From 71f3532e04e5c76327363a3fd36b506f54e5043d Mon Sep 17 00:00:00 2001 From: Přemysl Janouch Date: Sat, 21 Nov 2015 22:47:52 +0100 Subject: degesch: add the first Lua plugin to distribution This required separate plugin directories for both pluginized executables. --- CMakeLists.txt | 11 +- config.h.in | 2 +- plugins/coin | 128 --- plugins/degesch/ping-timeout.lua | 33 + plugins/eval | 312 ----- plugins/pomodoro | 502 --------- plugins/script | 2310 -------------------------------------- plugins/youtube | 111 -- plugins/zyklonb/coin | 128 +++ plugins/zyklonb/eval | 312 +++++ plugins/zyklonb/pomodoro | 502 +++++++++ plugins/zyklonb/script | 2310 ++++++++++++++++++++++++++++++++++++++ plugins/zyklonb/youtube | 111 ++ zyklonb.c | 1 + 14 files changed, 3404 insertions(+), 3369 deletions(-) delete mode 100755 plugins/coin create mode 100644 plugins/degesch/ping-timeout.lua delete mode 100755 plugins/eval delete mode 100755 plugins/pomodoro delete mode 100755 plugins/script delete mode 100755 plugins/youtube create mode 100755 plugins/zyklonb/coin create mode 100755 plugins/zyklonb/eval create mode 100755 plugins/zyklonb/pomodoro create mode 100755 plugins/zyklonb/script create mode 100755 plugins/zyklonb/youtube diff --git a/CMakeLists.txt b/CMakeLists.txt index 64bb667..2e8a2f8 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -94,7 +94,8 @@ set (HAVE_EDITLINE "${WANT_LIBEDIT}") set (HAVE_LUA "${WITH_LUA}") include (GNUInstallDirs) -set (plugin_dir ${CMAKE_INSTALL_LIBDIR}/${PROJECT_NAME}) +# ZyklonB is currently an odd duck but degesch follows normal XDG rules +set (zyklonb_plugin_dir ${CMAKE_INSTALL_LIBDIR}/zyklonb/plugins) configure_file (${PROJECT_SOURCE_DIR}/config.h.in ${PROJECT_BINARY_DIR}/config.h) include_directories (${PROJECT_SOURCE_DIR} ${PROJECT_BINARY_DIR}) @@ -138,10 +139,10 @@ add_custom_target (clang-tidy # Installation install (TARGETS zyklonb degesch kike DESTINATION ${CMAKE_INSTALL_BINDIR}) install (FILES LICENSE DESTINATION ${CMAKE_INSTALL_DOCDIR}) - -foreach (plugin coin eval script youtube ${plugins}) - install (FILES plugins/${plugin} DESTINATION ${plugin_dir}) -endforeach (plugin) +install (DIRECTORY plugins/zyklonb/ + DESTINATION ${zyklonb_plugin_dir} USE_SOURCE_PERMISSIONS) +install (DIRECTORY plugins/degesch/ + DESTINATION ${CMAKE_INSTALL_DATADIR}/degesch/plugins) # Generate documentation from program help find_program (HELP2MAN_EXECUTABLE help2man) diff --git a/config.h.in b/config.h.in index 833f874..0ad9559 100644 --- a/config.h.in +++ b/config.h.in @@ -2,7 +2,7 @@ #define CONFIG_H #define PROGRAM_VERSION "${project_VERSION}" -#define PLUGIN_DIR "${CMAKE_INSTALL_PREFIX}/${plugin_dir}" +#define ZYKLONB_PLUGIN_DIR "${CMAKE_INSTALL_PREFIX}/${zyklonb_plugin_dir}" #cmakedefine HAVE_READLINE #cmakedefine HAVE_EDITLINE diff --git a/plugins/coin b/plugins/coin deleted file mode 100755 index 65967ad..0000000 --- a/plugins/coin +++ /dev/null @@ -1,128 +0,0 @@ -#!/usr/bin/env tclsh -# -# ZyklonB coin plugin, random number-based utilities -# -# Copyright 2012, 2014 Přemysl Janouch -# See the file LICENSE for licensing information. -# - -# This is a terrible excuse for a programming language and I feel dirty. - -proc parse {line} { - global msg - unset -nocomplain msg - - if [regexp {^:([^ ]*) *(.*)} $line -> prefix rest] { - set msg(prefix) $prefix - set line $rest - } - if [regexp {^([^ ]*) *(.*)} $line -> command rest] { - set msg(command) $command - set line $rest - } - while {1} { - set line [string trimleft $line " "] - set i [string first " " $line] - if {$i == -1} { set i [string length $line] } - if {$i == 0} { break } - - if {[string index $line 0] == ":"} { - lappend msg(param) [string range $line 1 end] - break - } - lappend msg(param) [string range $line 0 [expr $i - 1]] - set line [string range $line $i end] - } -} - -proc get_config {key} { - global msg - puts "ZYKLONB get_config :$key" - gets stdin line - parse $line - return [lindex $msg(param) 0] -} - -proc pmrespond {text} { - global ctx - global ctx_quote - puts "PRIVMSG $ctx :$ctx_quote$text" -} - -fconfigure stdin -translation crlf -encoding iso8859-1 -fconfigure stdout -translation crlf -encoding iso8859-1 - -set prefix [get_config prefix] -puts "ZYKLONB register" - -set eightball [list \ - "It is certain" \ - "It is decidedly so" \ - "Without a doubt" \ - "Yes - definitely" \ - "You may rely on it" \ - "As I see it, yes" \ - "Most likely" \ - "Outlook good" \ - "Yes" \ - "Signs point to yes" \ - "Reply hazy, try again" \ - "Ask again later" \ - "Better not tell you now" \ - "Cannot predict now" \ - "Concentrate and ask again" \ - "Don't count on it" \ - "My reply is no" \ - "My sources say no" \ - "Outlook not so good" \ - "Very doubtful"] - -while {[gets stdin line] != -1} { - parse $line - - if {! [info exists msg(prefix)] || ! [info exists msg(command)] - || $msg(command) != "PRIVMSG" || ! [info exists msg(param)] - || [llength $msg(param)] < 2} { continue } - - regexp {^[^!]*} $msg(prefix) ctx - if [regexp {^[#&+!]} [lindex $msg(param) 0]] { - set ctx_quote "$ctx: " - set ctx [lindex $msg(param) 0] - } else { set ctx_quote "" } - - set input [lindex $msg(param) 1] - set first_chars [string range $input 0 \ - [expr [string length $prefix] - 1]] - if {$first_chars != $prefix} { continue } - set input [string range $input [string length $prefix] end] - - if {$input == "coin"} { - if {rand() < 0.5} { - pmrespond "Heads." - } else { - pmrespond "Tails." - } - } elseif {[regexp {^dice( +|$)(.*)} $input -> _ args]} { - if {! [string is integer -strict $args] || $args <= 0} { - pmrespond "Invalid or missing number." - } else { - pmrespond [expr {int($args * rand()) + 1}] - } - } elseif {[regexp {^(choose|\?)( +|$)(.*)} $input -> _ _ args]} { - if {$args == ""} { - pmrespond "Nothing to choose from." - } else { - set c [split $args ",|"] - pmrespond [string trim [lindex $c \ - [expr {int([llength $c] * rand())}]]] - } - } elseif {[regexp {^eightball( +|$)(.*)} $input -> _ args]} { - if {$args == ""} { - pmrespond "You should, you know, ask something." - } else { - pmrespond [lindex $eightball \ - [expr {int([llength $eightball] * rand())}]]. - } - } -} - diff --git a/plugins/degesch/ping-timeout.lua b/plugins/degesch/ping-timeout.lua new file mode 100644 index 0000000..72a754f --- /dev/null +++ b/plugins/degesch/ping-timeout.lua @@ -0,0 +1,33 @@ +-- +-- ping-timeout.lua: ping timeout readability enhancement plugin +-- +-- Copyright (c) 2015, Přemysl Janouch +-- +-- Permission to use, copy, modify, and/or distribute this software for any +-- purpose with or without fee is hereby granted, provided that the above +-- copyright notice and this permission notice appear in all copies. +-- +-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY +-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION +-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN +-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +-- + +degesch.hook_irc (function (hook, server, line) + local start, timeout = + line:match ("^(:[^ ]* QUIT :Ping timeout:) (%d+) seconds$") + if not start then + return line + end + + local minutes = timeout // 60 + if minutes == 0 then + return line + end + + local seconds = timeout % 60 + return string.format ("%s %d minutes, %d seconds", start, minutes, seconds) +end) diff --git a/plugins/eval b/plugins/eval deleted file mode 100755 index 982d78b..0000000 --- a/plugins/eval +++ /dev/null @@ -1,312 +0,0 @@ -#!/usr/bin/awk -f -# -# ZyklonB eval plugin, LISP-like expression evaluator -# -# Copyright 2013, 2014 Přemysl Janouch -# See the file LICENSE for licensing information. -# - -BEGIN \ -{ - RS = "\r" - ORS = "\r\n" - IGNORECASE = 1 - srand() - - prefix = get_config("prefix") - - print "ZYKLONB register" - fflush("") - - # All functions have to be in this particular array - min_args["int"] = 1 - min_args["+"] = 1 - min_args["-"] = 1 - min_args["*"] = 1 - min_args["/"] = 1 - min_args["%"] = 1 - min_args["^"] = 1 - min_args["**"] = 1 - min_args["exp"] = 1 - min_args["sin"] = 1 - min_args["cos"] = 1 - min_args["atan2"] = 2 - min_args["log"] = 1 - min_args["rand"] = 0 - min_args["sqrt"] = 1 - - min_args["pi"] = 0 - min_args["e"] = 0 - - min_args["min"] = 1 - min_args["max"] = 1 - - # Whereas here their presence is only optional - max_args["int"] = 1 - max_args["sin"] = 1 - max_args["cos"] = 1 - max_args["atan2"] = 2 - max_args["log"] = 1 - max_args["rand"] = 0 - max_args["sqrt"] = 1 - - max_args["pi"] = 0 - max_args["e"] = 0 -} - -{ - parse($0) -} - -msg_command == "PRIVMSG" \ -{ - # Context = either channel or user nickname - match(msg_prefix, /^[^!]+/) - ctx = substr(msg_prefix, RSTART, RLENGTH) - if (msg_param[0] ~ /^[#&!+]/) - { - ctx_quote = ctx ": " - ctx = msg_param[0] - } - else - ctx_quote = "" - - - if (substr(msg_param[1], 1, length(prefix)) == prefix) - { - keyword = "eval" - text = substr(msg_param[1], 1 + length(prefix)) - if (match(text, "^" keyword "([^A-Za-z0-9].*|$)")) - process_request(substr(text, 1 + length(keyword))) - } -} - -{ - fflush("") -} - -function pmrespond (text) -{ - print "PRIVMSG " ctx " :" ctx_quote text -} - -function process_request (input, res, x) -{ - delete funs - delete accumulator - delete n_args - - res = "" - fun_top = 0 - funs[0] = "" - accumulator[0] = 0 - n_args[0] = 0 - - if (match(input, "^[ \t]*")) - input = substr(input, RLENGTH + 1) - if (input == "") - res = "expression missing" - - while (res == "" && input != "") { - if (match(input, "^-?[0-9]+\\.?[0-9]*")) { - x = substr(input, RSTART, RLENGTH) - input = substr(input, RLENGTH + 1) - - match(input, "^ *") - input = substr(input, RLENGTH + 1) - - res = process_argument(x) - } else if (match(input, "^[(]([^ ()]+)")) { - x = substr(input, RSTART + 1, RLENGTH - 1) - input = substr(input, RLENGTH + 1) - - match(input, "^ *") - input = substr(input, RLENGTH + 1) - - if (!(x in min_args)) { - res = "undefined function '" x "'" - } else { - fun_top++ - funs[fun_top] = x - accumulator[fun_top] = 636363 - n_args[fun_top] = 0 - } - } else if (match(input, "^[)] *")) { - input = substr(input, RLENGTH + 1) - res = process_end() - } else - res = "invalid input at '" substr(input, 1, 10) "...'" - } - - if (res == "") { - if (fun_top != 0) - res = "unclosed '" funs[fun_top] "'" - else if (n_args[0] != 1) - res = "internal error, expected one result" \ - ", got " n_args[0] " instead" - } - - if (res == "") - pmrespond(accumulator[0]) - else - pmrespond(res) -} - -function process_argument (arg) -{ - if (fun_top == 0) { - if (n_args[0]++ != 0) - return "too many results, I only expect one" - - accumulator[0] = arg - return "" - } - - fun = funs[fun_top] - if (fun in max_args && max_args[fun] <= n_args[fun_top]) - return "too many operands for " fun - - if (fun == "int") { - accumulator[fun_top] = int(arg) - } else if (fun == "+") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else - accumulator[fun_top] += arg - } else if (fun == "-") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else - accumulator[fun_top] -= arg - } else if (fun == "*") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else - accumulator[fun_top] *= arg - } else if (fun == "/") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else if (arg == 0) - return "division by zero" - else - accumulator[fun_top] /= arg - } else if (fun == "%") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else if (arg == 0) - return "division by zero" - else - accumulator[fun_top] %= arg - } else if (fun == "^" || fun == "**" || fun == "exp") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else - accumulator[fun_top] ^= arg - } else if (fun == "sin") { - accumulator[fun_top] = sin(arg) - } else if (fun == "cos") { - accumulator[fun_top] = cos(arg) - } else if (fun == "atan2") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else - accumulator[fun_top] = atan2(accumulator[fun_top], arg) - } else if (fun == "log") { - accumulator[fun_top] = log(arg) - } else if (fun == "rand") { - # Just for completeness, execution never gets here - } else if (fun == "sqrt") { - accumulator[fun_top] = sqrt(arg) - } else if (fun == "min") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else if (accumulator[fun_top] > arg) - accumulator[fun_top] = arg - } else if (fun == "max") { - if (n_args[fun_top] == 0) - accumulator[fun_top] = arg - else if (accumulator[fun_top] < arg) - accumulator[fun_top] = arg - } else - return "internal error, unhandled operands for " fun - - n_args[fun_top]++ - return "" -} - -function process_end () -{ - if (fun_top <= 0) - return "extraneous ')'" - - fun = funs[fun_top] - if (!(fun in min_args)) - return "internal error, unhandled ')' for '" fun "'" - if (min_args[fun] > n_args[fun_top]) - return "not enough operands for '" fun "'" - - # There's no 'init' function to do it in - if (fun == "rand") - accumulator[fun_top] = rand() - else if (fun == "pi") - accumulator[fun_top] = 3.141592653589793 - else if (fun == "e") - accumulator[fun_top] = 2.718281828459045 - - return process_argument(accumulator[fun_top--]) -} - -function get_config (key) -{ - print "ZYKLONB get_config :" key - fflush("") - - getline - parse($0) - return msg_param[0] -} - -function parse (line, s, n, id, token) -{ - s = 1 - id = 0 - - # NAWK only uses the first character of RS - if (line ~ /^\n/) - line = substr(line, 2) - - msg_prefix = "" - msg_command = "" - delete msg_param - - n = match(substr(line, s), / |$/) - while (n) - { - token = substr(line, s, n - 1) - if (token ~ /^:/) - { - if (s == 1) - msg_prefix = substr(token, 2) - else - { - msg_param[id] = substr(line, s + 1) - break - } - } - else if (!msg_command) - msg_command = toupper(token) - else - msg_param[id++] = token - - s = s + n - n = index(substr(line, s), " ") - - if (!n) - { - n = length(substr(line, s)) + 1 - if (n == 1) - break; - } - } -} - diff --git a/plugins/pomodoro b/plugins/pomodoro deleted file mode 100755 index 8f30327..0000000 --- a/plugins/pomodoro +++ /dev/null @@ -1,502 +0,0 @@ -#!/usr/bin/env ruby -# coding: utf-8 -# -# ZyklonB pomodoro plugin -# -# Copyright 2015 Přemysl Janouch -# See the file LICENSE for licensing information. -# - -# --- Simple event loop -------------------------------------------------------- - -# This is more or less a straight-forward port of my C event loop. It's a bit -# unfortunate that I really have to implement all this in order to get some -# basic asynchronicity but at least I get to exercise my Ruby. - -class TimerEvent - attr_accessor :index, :when, :callback - - def initialize (callback) - raise ArgumentError unless callback.is_a? Proc - - @index = nil - @when = nil - @callback = callback - end - - def active? - @index != nil - end - - def until - return @when - Time.new - end -end - -class IOEvent - READ = 1 << 0 - WRITE = 1 << 1 - - attr_accessor :read_index, :write_index, :io, :callback - - def initialize (io, callback) - raise ArgumentError unless callback.is_a? Proc - - @read_index = nil - @write_index = nil - @io = io - @callback = callback - end -end - -class EventLoop - def initialize - @running = false - @timers = [] - @readers = [] - @writers = [] - @io_to_event = {} - end - - def set_timer (timer, timeout) - raise ArgumentError unless timer.is_a? TimerEvent - - timer.when = Time.now + timeout - if timer.index - heapify_down timer.index - heapify_up timer.index - else - timer.index = @timers.size - @timers.push timer - heapify_up timer.index - end - end - - def reset_timer (timer) - raise ArgumentError unless timer.is_a? TimerEvent - remove_timer_at timer.index if timer.index - end - - def set_io (io_event, events) - raise ArgumentError unless io_event.is_a? IOEvent - raise ArgumentError unless events.is_a? Numeric - - reset_io io_event - - @io_to_event[io_event.io] = io_event - if events & IOEvent::READ - io_event.read_index = @readers.size - @readers.push io_event.io - end - if events & IOEvent::WRITE - io_event.read_index = @writers.size - @writers.push io_event.io - end - end - - def reset_io (io_event) - raise ArgumentError unless io_event.is_a? IOEvent - - @readers.delete_at io_event.read_index if io_event.read_index - @writers.delete_at io_event.write_index if io_event.write_index - - io_event.read_index = nil - io_event.write_index = nil - - @io_to_event.delete io_event.io - end - - def run - @running = true - while @running do one_iteration end - end - - def quit - @running = false - end - -private - def one_iteration - rs, ws, = IO.select @readers, @writers, [], nearest_timeout - dispatch_timers - (Array(rs) | Array(ws)).each do |io| - @io_to_event[io].callback.call io - end - end - - def dispatch_timers - now = Time.new - while not @timers.empty? and @timers[0].when <= now do - @timers[0].callback.call - remove_timer_at 0 - end - end - - def nearest_timeout - return nil if @timers.empty? - timeout = @timers[0].until - if timeout < 0 then 0 else timeout end - end - - def remove_timer_at (index) - @timers[index].index = nil - moved = @timers.pop - return if index == @timers.size - - @timers[index] = moved - @timers[index].index = index - heapify_down index - end - - def swap_timers (a, b) - @timers[a], @timers[b] = @timers[b], @timers[a] - @timers[a].index = a - @timers[b].index = b - end - - def heapify_up (index) - while index != 0 do - parent = (index - 1) / 2 - break if @timers[parent].when <= @timers[index].when - swap_timers index, parent - index = parent - end - end - - def heapify_down (index) - loop do - parent = index - left = 2 * index + 1 - right = 2 * index + 2 - - lowest = parent - lowest = left if left < @timers.size and - @timers[left] .when < @timers[lowest].when - lowest = right if right < @timers.size and - @timers[right].when < @timers[lowest].when - break if parent == lowest - - swap_timers lowest, parent - index = lowest - end - end -end - -# --- IRC protocol ------------------------------------------------------------- - -$stdin.set_encoding 'ASCII-8BIT' -$stdout.set_encoding 'ASCII-8BIT' - -$stdin.sync = true -$stdout.sync = true - -$/ = "\r\n" -$\ = "\r\n" - -RE_MSG = /(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?([^ ]+)(?: +(.*))?$/ -RE_ARGS = /:?((?<=:).*|[^ ]+) */ - -def parse (line) - m = line.match RE_MSG - return nil if not m - - nick, user, host, command, args = *m.captures - args = if args then args.scan(RE_ARGS).flatten else [] end - [nick, user, host, command, args] -end - -def bot_print (what) - print "ZYKLONB print :#{what}" -end - -# --- Initialization ----------------------------------------------------------- - -# We can only read in configuration from here so far -# To read it from anywhere else, it has to be done asynchronously -$config = {} -[:prefix].each do |name| - print "ZYKLONB get_config :#{name}" - _, _, _, _, args = *parse($stdin.gets.chomp) - $config[name] = args[0] -end - -print "ZYKLONB register" - -# --- Plugin logic ------------------------------------------------------------- - -# FIXME: this needs a major refactor as it doesn't make much sense at all - -class MessageMeta < Struct.new(:nick, :user, :host, :channel, :ctx, :quote) - def respond (message) - print "PRIVMSG #{ctx} :#{quote}#{message}" - end -end - -class Context - attr_accessor :nick, :ctx - - def initialize (meta) - @nick = meta.nick - @ctx = meta.ctx - end - - def == (other) - self.class == other.class \ - and other.nick == @nick \ - and other.ctx == @ctx - end - - alias eql? == - - def hash - @nick.hash ^ @ctx.hash - end -end - -class PomodoroTimer - def initialize (context) - @ctx = context.ctx - @nicks = [context.nick] - - @timer_work = TimerEvent.new(lambda { on_work }) - @timer_rest = TimerEvent.new(lambda { on_rest }) - - on_work - end - - def inform (message) - # FIXME: it tells the nick even in PM's - quote = "#{@nicks.join(" ")}: " - print "PRIVMSG #{@ctx} :#{quote}#{message}" - end - - def on_work - inform "work now!" - $loop.set_timer @timer_rest, 25 * 60 - end - - def on_rest - inform "rest now!" - $loop.set_timer @timer_work, 5 * 60 - end - - def join (meta) - return if @nicks.include? meta.nick - - meta.respond "you have joined their pomodoro" - @nicks |= [meta.nick] - end - - def part (meta, requested) - return if not @nicks.include? meta.nick - - if requested - meta.respond "you have stopped your pomodoro" - end - - @nicks -= [meta.nick] - if @nicks.empty? - $loop.reset_timer @timer_work - $loop.reset_timer @timer_rest - end - end - - def status (meta) - return if not @nicks.include? meta.nick - - if @timer_rest.active? - till = @timer_rest.until - meta.respond "working, #{(till / 60).to_i} minutes, " + - "#{(till % 60).to_i} seconds until rest" - end - if @timer_work.active? - till = @timer_work.until - meta.respond "resting, #{(till / 60).to_i} minutes, " + - "#{(till % 60).to_i} seconds until work" - end - end -end - -class Pomodoro - KEYWORD = "pomodoro" - - def initialize - @timers = {} - end - - def on_help (meta, args) - meta.respond "usage: #{KEYWORD} { start | stop | join | status }" - end - - def on_start (meta, args) - if args.size != 0 - meta.respond "usage: #{KEYWORD} start" - return - end - - context = Context.new meta - if @timers[context] - meta.respond "you already have a timer running here" - else - @timers[context] = PomodoroTimer.new meta - end - end - - def on_join (meta, args) - if args.size != 1 - meta.respond "usage: #{KEYWORD} join " - return - end - - context = Context.new meta - if @timers[context] - meta.respond "you already have a timer running here" - return - end - - joined_context = Context.new meta - joined_context.nick = args.shift - timer = @timers[joined_context] - if not timer - meta.respond "that person doesn't have a timer here" - else - timer.join meta - @timers[context] = timer - end - end - - def on_stop (meta, args) - if args.size != 0 - meta.respond "usage: #{KEYWORD} stop" - return - end - - context = Context.new meta - timer = @timers[context] - if not timer - meta.respond "you don't have a timer running here" - else - timer.part meta, true - @timers.delete context - end - end - - def on_status (meta, args) - if args.size != 0 - meta.respond "usage: #{KEYWORD} status" - return - end - - timer = @timers[Context.new meta] - if not timer - meta.respond "you don't have a timer running here" - else - timer.status meta - end - end - - def process_command (meta, msg) - args = msg.split - return if args.shift != KEYWORD - - method = "on_#{args.shift}" - send method, meta, args if respond_to? method - end - - def on_server_nick (meta, command, args) - # TODO: either handle this properly... - happened = false - @timers.keys.each do |key| - next if key.nick != meta.nick - @timers[key].part meta, false - @timers.delete key - happened = true - end - if happened - # TODO: ...or at least inform the user via his new nick - end - end - - def on_server_part (meta, command, args) - # TODO: instead of cancelling the user's pomodoros, either redirect - # them to PM's and later upon rejoining undo the redirection... - context = Context.new(meta) - context.ctx = meta.channel - if @timers.include? context - # TODO: ...or at least inform the user about the cancellation - @timers[context].part meta, false - @timers.delete context - end - end - - def on_server_quit (meta, command, args) - @timers.keys.each do |key| - next if key.nick != meta.nick - @timers[key].part meta, false - @timers.delete key - end - end - - def process (meta, command, args) - method = "on_server_#{command.downcase}" - send method, meta, command, args if respond_to? method - end -end - -# --- IRC message processing --------------------------------------------------- - -$handlers = [Pomodoro.new] -def process_line (line) - msg = parse line - return if not msg - - nick, user, host, command, args = *msg - - context = nick - quote = "" - channel = nil - - if args.size >= 1 and args[0].start_with? ?#, ?+, ?&, ?! - case command - when "PRIVMSG", "NOTICE", "JOIN" - context = args[0] - quote = "#{nick}: " - channel = args[0] - when "PART" - channel = args[0] - end - end - - # Handle any IRC message - meta = MessageMeta.new(nick, user, host, channel, context, quote).freeze - $handlers.each do |handler| - handler.process meta, command, args - end - - # Handle pre-processed bot commands - if command == 'PRIVMSG' and args.size >= 2 - msg = args[1] - return unless msg.start_with? $config[:prefix] - $handlers.each do |handler| - handler.process_command meta, msg[$config[:prefix].size..-1] - end - end -end - -buffer = "" -stdin_io = IOEvent.new($stdin, lambda do |io| - begin - buffer << io.read_nonblock(4096) - lines = buffer.split $/, -1 - buffer = lines.pop - lines.each { |line| process_line line } - rescue EOFError - $loop.quit - rescue IO::WaitReadable - # Ignore - end -end) - -$loop = EventLoop.new -$loop.set_io stdin_io, IOEvent::READ -$loop.run diff --git a/plugins/script b/plugins/script deleted file mode 100755 index 661fbb0..0000000 --- a/plugins/script +++ /dev/null @@ -1,2310 +0,0 @@ -#!/usr/bin/tcc -run -lm -// -// ZyklonB scripting plugin, using a custom stack-based language -// -// Copyright 2014 Přemysl Janouch -// See the file LICENSE for licensing information. -// -// Just compile this file as usual (sans #!) if you don't feel like using TCC. -// It is a very basic and portable C99 application. It's not supposed to be -// very sophisticated, for it'd get extremely big. -// -// The main influences of the language were Factor and Joy, stripped of all -// even barely complex stuff. In its current state, it's only really useful as -// a calculator but it's got great potential for extending. -// -// If you don't like something, just change it; this is just an experiment. -// -// NOTE: it is relatively easy to abuse. Be careful. -// - -#define _XOPEN_SOURCE 500 - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define ADDRESS_SPACE_LIMIT (100 * 1024 * 1024) -#include - -#if defined __GNUC__ -#define ATTRIBUTE_PRINTF(x, y) __attribute__ ((format (printf, x, y))) -#else // ! __GNUC__ -#define ATTRIBUTE_PRINTF(x, y) -#endif // ! __GNUC__ - -#define N_ELEMENTS(a) (sizeof (a) / sizeof ((a)[0])) - -// --- Utilities --------------------------------------------------------------- - -static char *strdup_printf (const char *format, ...) ATTRIBUTE_PRINTF (1, 2); - -static char * -strdup_vprintf (const char *format, va_list ap) -{ - va_list aq; - va_copy (aq, ap); - int size = vsnprintf (NULL, 0, format, aq); - va_end (aq); - if (size < 0) - return NULL; - - char buf[size + 1]; - size = vsnprintf (buf, sizeof buf, format, ap); - if (size < 0) - return NULL; - - return strdup (buf); -} - -static char * -strdup_printf (const char *format, ...) -{ - va_list ap; - va_start (ap, format); - char *result = strdup_vprintf (format, ap); - va_end (ap); - return result; -} - -// --- Generic buffer ---------------------------------------------------------- - -struct buffer -{ - char *s; ///< Buffer data - size_t alloc; ///< Number of bytes allocated - size_t len; ///< Number of bytes used - bool memory_failure; ///< Memory allocation failed -}; - -#define BUFFER_INITIALIZER { NULL, 0, 0, false } - -static bool -buffer_append (struct buffer *self, const void *s, size_t n) -{ - if (self->memory_failure) - return false; - - if (!self->s) - self->s = malloc (self->alloc = 8); - while (self->len + n > self->alloc) - self->s = realloc (self->s, self->alloc <<= 1); - - if (!self->s) - { - self->memory_failure = true; - return false; - } - - memcpy (self->s + self->len, s, n); - self->len += n; - return true; -} - -inline static bool -buffer_append_c (struct buffer *self, char c) -{ - return buffer_append (self, &c, 1); -} - -// --- Data types -------------------------------------------------------------- - -enum item_type -{ - ITEM_STRING, - ITEM_WORD, - ITEM_INTEGER, - ITEM_FLOAT, - ITEM_LIST -}; - -struct item -{ -#define ITEM_HEADER \ - enum item_type type; /**< The type of this object */ \ - struct item *next; /**< Next item on the list/stack */ - - ITEM_HEADER -}; - -struct item_string -{ - ITEM_HEADER - size_t len; ///< Length of the string (sans '\0') - char value[]; ///< The null-terminated string value -}; - -#define get_string(item) \ - (assert ((item)->type == ITEM_STRING), \ - ((struct item_string *)(item))->value) - -/// It looks like a string but it doesn't quack like a string -#define item_word item_string - -#define get_word(item) \ - (assert ((item)->type == ITEM_WORD), \ - ((struct item_word *)(item))->value) - -struct item_integer -{ - ITEM_HEADER - long long value; ///< The integer value -}; - -#define get_integer(item) \ - (assert ((item)->type == ITEM_INTEGER), \ - ((struct item_integer *)(item))->value) - -struct item_float -{ - ITEM_HEADER - long double value; ///< The floating point value -}; - -#define get_float(item) \ - (assert ((item)->type == ITEM_FLOAT), \ - ((struct item_float *)(item))->value) - -struct item_list -{ - ITEM_HEADER - struct item *head; ///< The head of the list -}; - -#define get_list(item) \ - (assert ((item)->type == ITEM_LIST), \ - ((struct item_list *)(item))->head) - -#define set_list(item, head_) \ - (assert ((item)->type == ITEM_LIST), \ - item_free_list (((struct item_list *)(item))->head), \ - ((struct item_list *)(item))->head = (head_)) - -const char * -item_type_to_str (enum item_type type) -{ - switch (type) - { - case ITEM_STRING: return "string"; - case ITEM_WORD: return "word"; - case ITEM_INTEGER: return "integer"; - case ITEM_FLOAT: return "float"; - case ITEM_LIST: return "list"; - } - abort (); -} - -// --- Item management --------------------------------------------------------- - -static void item_free_list (struct item *); -static struct item *new_clone_list (const struct item *); - -static void -item_free (struct item *item) -{ - if (item->type == ITEM_LIST) - item_free_list (get_list (item)); - free (item); -} - -static void -item_free_list (struct item *item) -{ - while (item) - { - struct item *link = item; - item = item->next; - item_free (link); - } -} - -static struct item * -new_clone (const struct item *item) -{ - size_t size; - switch (item->type) - { - case ITEM_STRING: - case ITEM_WORD: - { - const struct item_string *x = (const struct item_string *) item; - size = sizeof *x + x->len + 1; - break; - } - case ITEM_INTEGER: size = sizeof (struct item_integer); break; - case ITEM_FLOAT: size = sizeof (struct item_float); break; - case ITEM_LIST: size = sizeof (struct item_list); break; - } - - struct item *clone = malloc (size); - if (!clone) - return NULL; - - memcpy (clone, item, size); - if (item->type == ITEM_LIST) - { - struct item_list *x = (struct item_list *) clone; - if (x->head && !(x->head = new_clone_list (x->head))) - { - free (clone); - return NULL; - } - } - clone->next = NULL; - return clone; -} - -static struct item * -new_clone_list (const struct item *item) -{ - struct item *head = NULL, *clone; - for (struct item **out = &head; item; item = item->next) - { - if (!(clone = *out = new_clone (item))) - { - item_free_list (head); - return NULL; - } - clone->next = NULL; - out = &clone->next; - } - return head; -} - -static struct item * -new_string (const char *s, ssize_t len) -{ - if (len < 0) - len = strlen (s); - - struct item_string *item = calloc (1, sizeof *item + len + 1); - if (!item) - return NULL; - - item->type = ITEM_STRING; - item->len = len; - memcpy (item->value, s, len); - item->value[len] = '\0'; - return (struct item *) item; -} - -static struct item * -new_word (const char *s, ssize_t len) -{ - struct item *item = new_string (s, len); - if (!item) - return NULL; - - item->type = ITEM_WORD; - return item; -} - -static struct item * -new_integer (long long value) -{ - struct item_integer *item = calloc (1, sizeof *item); - if (!item) - return NULL; - - item->type = ITEM_INTEGER; - item->value = value; - return (struct item *) item; -} - -static struct item * -new_float (long double value) -{ - struct item_float *item = calloc (1, sizeof *item); - if (!item) - return NULL; - - item->type = ITEM_FLOAT; - item->value = value; - return (struct item *) item; -} - -static struct item * -new_list (struct item *head) -{ - struct item_list *item = calloc (1, sizeof *item); - if (!item) - return NULL; - - item->type = ITEM_LIST; - item->head = head; - return (struct item *) item; -} - -// --- Parsing ----------------------------------------------------------------- - -#define PARSE_ERROR_TABLE(XX) \ - XX( OK, NULL ) \ - XX( EOF, "unexpected end of input" ) \ - XX( INVALID_HEXA_ESCAPE, "invalid hexadecimal escape sequence" ) \ - XX( INVALID_ESCAPE, "unrecognized escape sequence" ) \ - XX( MEMORY, "memory allocation failure" ) \ - XX( FLOAT_RANGE, "floating point value out of range" ) \ - XX( INTEGER_RANGE, "integer out of range" ) \ - XX( INVALID_INPUT, "invalid input" ) \ - XX( UNEXPECTED_INPUT, "unexpected input" ) - -enum tokenizer_error -{ -#define XX(x, y) PARSE_ERROR_ ## x, - PARSE_ERROR_TABLE (XX) -#undef XX - PARSE_ERROR_COUNT -}; - -struct tokenizer -{ - const char *cursor; - enum tokenizer_error error; -}; - -static bool -decode_hexa_escape (struct tokenizer *self, struct buffer *buf) -{ - int i; - char c, code = 0; - - for (i = 0; i < 2; i++) - { - c = tolower (*self->cursor); - if (c >= '0' && c <= '9') - code = (code << 4) | (c - '0'); - else if (c >= 'a' && c <= 'f') - code = (code << 4) | (c - 'a' + 10); - else - break; - - self->cursor++; - } - - if (!i) - return false; - - buffer_append_c (buf, code); - return true; -} - -static bool -decode_octal_escape (struct tokenizer *self, struct buffer *buf) -{ - int i; - char c, code = 0; - - for (i = 0; i < 3; i++) - { - c = *self->cursor; - if (c < '0' || c > '7') - break; - - code = (code << 3) | (c - '0'); - self->cursor++; - } - - if (!i) - return false; - - buffer_append_c (buf, code); - return true; -} - -static bool -decode_escape_sequence (struct tokenizer *self, struct buffer *buf) -{ - // Support some basic escape sequences from the C language - char c; - switch ((c = *self->cursor)) - { - case '\0': - self->error = PARSE_ERROR_EOF; - return false; - case 'x': - case 'X': - self->cursor++; - if (decode_hexa_escape (self, buf)) - return true; - - self->error = PARSE_ERROR_INVALID_HEXA_ESCAPE; - return false; - default: - if (decode_octal_escape (self, buf)) - return true; - - self->cursor++; - const char *from = "abfnrtv\"\\", *to = "\a\b\f\n\r\t\v\"\\", *x; - if ((x = strchr (from, c))) - { - buffer_append_c (buf, to[x - from]); - return true; - } - - self->error = PARSE_ERROR_INVALID_ESCAPE; - return false; - } -} - -static struct item * -parse_string (struct tokenizer *self) -{ - struct buffer buf = BUFFER_INITIALIZER; - struct item *item = NULL; - char c; - - while (true) - switch ((c = *self->cursor++)) - { - case '\0': - self->cursor--; - self->error = PARSE_ERROR_EOF; - goto end; - case '"': - if (buf.memory_failure - || !(item = new_string (buf.s, buf.len))) - self->error = PARSE_ERROR_MEMORY; - goto end; - case '\\': - if (decode_escape_sequence (self, &buf)) - break; - goto end; - default: - buffer_append_c (&buf, c); - } - -end: - free (buf.s); - return item; -} - -static struct item * -try_parse_number (struct tokenizer *self) -{ - // These two standard library functions can digest a lot of various inputs, - // including NaN and +/- infinity. That may get a bit confusing. - char *float_end; - errno = 0; - long double float_value = strtold (self->cursor, &float_end); - int float_errno = errno; - - char *int_end; - errno = 0; - long long int_value = strtoll (self->cursor, &int_end, 10); - int int_errno = errno; - - // If they both fail, then this is most probably not a number. - if (float_end == int_end && float_end == self->cursor) - return NULL; - - // Only use the floating point result if it parses more characters: - struct item *item; - if (float_end > int_end) - { - if (float_errno == ERANGE) - { - self->error = PARSE_ERROR_FLOAT_RANGE; - return NULL; - } - self->cursor = float_end; - if (!(item = new_float (float_value))) - self->error = PARSE_ERROR_MEMORY; - return item; - } - else - { - if (int_errno == ERANGE) - { - self->error = PARSE_ERROR_INTEGER_RANGE; - return NULL; - } - self->cursor = int_end; - if (!(item = new_integer (int_value))) - self->error = PARSE_ERROR_MEMORY; - return item; - } -} - -static struct item * -parse_word (struct tokenizer *self) -{ - struct buffer buf = BUFFER_INITIALIZER; - struct item *item = NULL; - char c; - - // Here we accept almost anything that doesn't break the grammar - while (!strchr (" []\"", (c = *self->cursor++)) && (unsigned char) c > ' ') - buffer_append_c (&buf, c); - self->cursor--; - - if (buf.memory_failure) - self->error = PARSE_ERROR_MEMORY; - else if (!buf.len) - self->error = PARSE_ERROR_INVALID_INPUT; - else if (!(item = new_word (buf.s, buf.len))) - self->error = PARSE_ERROR_MEMORY; - - free (buf.s); - return item; -} - -static struct item *parse_item_list (struct tokenizer *); - -static struct item * -parse_list (struct tokenizer *self) -{ - struct item *list = parse_item_list (self); - if (self->error) - { - assert (list == NULL); - return NULL; - } - if (!*self->cursor) - { - self->error = PARSE_ERROR_EOF; - item_free_list (list); - return NULL; - } - assert (*self->cursor == ']'); - self->cursor++; - return new_list (list); -} - -static struct item * -parse_item (struct tokenizer *self) -{ - char c; - switch ((c = *self->cursor++)) - { - case '[': return parse_list (self); - case '"': return parse_string (self); - default:; - } - - self->cursor--; - struct item *item = try_parse_number (self); - if (!item && !self->error) - item = parse_word (self); - return item; -} - -static struct item * -parse_item_list (struct tokenizer *self) -{ - struct item *head = NULL; - struct item **tail = &head; - - char c; - bool expected = true; - while ((c = *self->cursor) && c != ']') - { - if (isspace (c)) - { - self->cursor++; - expected = true; - continue; - } - else if (!expected) - { - self->error = PARSE_ERROR_UNEXPECTED_INPUT; - goto fail; - } - - if (!(*tail = parse_item (self))) - goto fail; - tail = &(*tail)->next; - expected = false; - } - return head; - -fail: - item_free_list (head); - return NULL; -} - -static struct item * -parse (const char *s, const char **error) -{ - struct tokenizer self = { .cursor = s, .error = PARSE_ERROR_OK }; - struct item *list = parse_item_list (&self); - if (!self.error && *self.cursor != '\0') - { - self.error = PARSE_ERROR_UNEXPECTED_INPUT; - item_free_list (list); - list = NULL; - } - -#define XX(x, y) y, - static const char *strings[PARSE_ERROR_COUNT] = - { PARSE_ERROR_TABLE (XX) }; -#undef XX - - static char error_buf[128]; - if (self.error && error) - { - snprintf (error_buf, sizeof error_buf, "at character %d: %s", - (int) (self.cursor - s) + 1, strings[self.error]); - *error = error_buf; - } - return list; -} - -// --- Runtime ----------------------------------------------------------------- - -// TODO: try to think of a _simple_ way to do preemptive multitasking - -struct context -{ - struct item *stack; ///< The current top of the stack - size_t stack_size; ///< Number of items on the stack - - size_t reduction_count; ///< # of function calls so far - size_t reduction_limit; ///< The hard limit on function calls - - char *error; ///< Error information - bool error_is_fatal; ///< Whether the error can be catched - bool memory_failure; ///< Memory allocation failure - - void *user_data; ///< User data -}; - -/// Internal handler for a function -typedef bool (*handler_fn) (struct context *); - -struct fn -{ - struct fn *next; ///< The next link in the chain - - handler_fn handler; ///< Internal C handler, or NULL - struct item *script; ///< Alternatively runtime code - char name[]; ///< The name of the function -}; - -struct fn *g_functions; ///< Maps words to functions - -static void -context_init (struct context *ctx) -{ - ctx->stack = NULL; - ctx->stack_size = 0; - - ctx->reduction_count = 0; - ctx->reduction_limit = 2000; - - ctx->error = NULL; - ctx->error_is_fatal = false; - ctx->memory_failure = false; - - ctx->user_data = NULL; -} - -static void -context_free (struct context *ctx) -{ - item_free_list (ctx->stack); - ctx->stack = NULL; - - free (ctx->error); - ctx->error = NULL; -} - -static bool -set_error (struct context *ctx, const char *format, ...) -{ - free (ctx->error); - - va_list ap; - va_start (ap, format); - ctx->error = strdup_vprintf (format, ap); - va_end (ap); - - if (!ctx->error) - ctx->memory_failure = true; - return false; -} - -static bool -push (struct context *ctx, struct item *item) -{ - // The `item' is typically a result from new_(), thus when it is null, - // that function must have failed. This is a shortcut for convenience. - if (!item) - { - ctx->memory_failure = true; - return false; - } - - assert (item->next == NULL); - item->next = ctx->stack; - ctx->stack = item; - ctx->stack_size++; - return true; -} - -static bool -bump_reductions (struct context *ctx) -{ - if (++ctx->reduction_count >= ctx->reduction_limit) - { - ctx->error_is_fatal = true; - return set_error (ctx, "reduction limit reached"); - } - return true; -} - -static bool execute (struct context *, struct item *); - -static bool -call_function (struct context *ctx, const char *name) -{ - struct fn *iter; - for (iter = g_functions; iter; iter = iter->next) - if (!strcmp (name, iter->name)) - goto found; - return set_error (ctx, "unknown function: %s", name); - -found: - if (!bump_reductions (ctx)) - return false; - - if (iter->handler - ? iter->handler (ctx) - : execute (ctx, iter->script)) - return true; - - // In this case, `error' is NULL - if (ctx->memory_failure) - return false; - - // This creates some form of a stack trace - char *tmp = ctx->error; - ctx->error = NULL; - set_error (ctx, "%s -> %s", name, tmp); - free (tmp); - return false; -} - -static void -free_function (struct fn *fn) -{ - item_free_list (fn->script); - free (fn); -} - -static void -unregister_function (const char *name) -{ - for (struct fn **iter = &g_functions; *iter; iter = &(*iter)->next) - if (!strcmp ((*iter)->name, name)) - { - struct fn *tmp = *iter; - *iter = tmp->next; - free_function (tmp); - break; - } -} - -static struct fn * -prepend_new_fn (const char *name) -{ - struct fn *fn = calloc (1, sizeof *fn + strlen (name) + 1); - if (!fn) - return NULL; - - strcpy (fn->name, name); - fn->next = g_functions; - return g_functions = fn; -} - -static bool -register_handler (const char *name, handler_fn handler) -{ - unregister_function (name); - struct fn *fn = prepend_new_fn (name); - if (!fn) - return false; - fn->handler = handler; - return true; -} - -static bool -register_script (const char *name, struct item *script) -{ - unregister_function (name); - struct fn *fn = prepend_new_fn (name); - if (!fn) - return false; - fn->script = script; - return true; -} - -static bool -execute (struct context *ctx, struct item *script) -{ - for (; script; script = script->next) - { - if (script->type != ITEM_WORD) - { - if (!bump_reductions (ctx) - || !push (ctx, new_clone (script))) - return false; - } - else if (!call_function (ctx, get_word (script))) - return false; - } - return true; -} - -// --- Runtime library --------------------------------------------------------- - -#define defn(name) static bool name (struct context *ctx) - -#define check_stack(n) \ - if (ctx->stack_size < n) { \ - set_error (ctx, "stack underflow"); \ - return 0; \ - } - -inline static bool -check_stack_safe (struct context *ctx, size_t n) -{ - check_stack (n); - return true; -} - -static bool -check_type (struct context *ctx, const void *item_, enum item_type type) -{ - const struct item *item = item_; - if (item->type == type) - return true; - - return set_error (ctx, "invalid type: expected `%s', got `%s'", - item_type_to_str (type), item_type_to_str (item->type)); -} - -static struct item * -pop (struct context *ctx) -{ - check_stack (1); - struct item *top = ctx->stack; - ctx->stack = top->next; - top->next = NULL; - ctx->stack_size--; - return top; -} - -// - - Types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -#define defn_is_type(name, item_type) \ - defn (fn_is_##name) { \ - check_stack (1); \ - struct item *top = pop (ctx); \ - push (ctx, new_integer (top->type == (item_type))); \ - item_free (top); \ - return true; \ - } - -defn_is_type (string, ITEM_STRING) -defn_is_type (word, ITEM_WORD) -defn_is_type (integer, ITEM_INTEGER) -defn_is_type (float, ITEM_FLOAT) -defn_is_type (list, ITEM_LIST) - -defn (fn_to_string) -{ - check_stack (1); - struct item *item = pop (ctx); - char *value; - - switch (item->type) - { - case ITEM_WORD: - item->type = ITEM_STRING; - case ITEM_STRING: - return push (ctx, item); - - case ITEM_FLOAT: - value = strdup_printf ("%Lf", get_float (item)); - break; - case ITEM_INTEGER: - value = strdup_printf ("%lld", get_integer (item)); - break; - - default: - set_error (ctx, "cannot convert `%s' to `%s'", - item_type_to_str (item->type), item_type_to_str (ITEM_STRING)); - item_free (item); - return false; - } - - item_free (item); - if (!value) - { - ctx->memory_failure = true; - return false; - } - - item = new_string (value, -1); - free (value); - return push (ctx, item); -} - -defn (fn_to_integer) -{ - check_stack (1); - struct item *item = pop (ctx); - long long value; - - switch (item->type) - { - case ITEM_INTEGER: - return push (ctx, item); - case ITEM_FLOAT: - value = get_float (item); - break; - - case ITEM_STRING: - { - char *end; - const char *s = get_string (item); - value = strtoll (s, &end, 10); - if (end != s && *s == '\0') - break; - - item_free (item); - return set_error (ctx, "integer conversion error"); - } - - default: - set_error (ctx, "cannot convert `%s' to `%s'", - item_type_to_str (item->type), item_type_to_str (ITEM_INTEGER)); - item_free (item); - return false; - } - - item_free (item); - return push (ctx, new_integer (value)); -} - -defn (fn_to_float) -{ - check_stack (1); - struct item *item = pop (ctx); - long double value; - - switch (item->type) - { - case ITEM_FLOAT: - return push (ctx, item); - case ITEM_INTEGER: - value = get_integer (item); - break; - - case ITEM_STRING: - { - char *end; - const char *s = get_string (item); - value = strtold (s, &end); - if (end != s && *s == '\0') - break; - - item_free (item); - return set_error (ctx, "float conversion error"); - } - - default: - set_error (ctx, "cannot convert `%s' to `%s'", - item_type_to_str (item->type), item_type_to_str (ITEM_FLOAT)); - item_free (item); - return false; - } - - item_free (item); - return push (ctx, new_float (value)); -} - -// - - Miscellaneous - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -defn (fn_length) -{ - check_stack (1); - struct item *item = pop (ctx); - bool success = true; - switch (item->type) - { - case ITEM_STRING: - success = push (ctx, new_integer (((struct item_string *) item)->len)); - break; - case ITEM_LIST: - { - long long length = 0; - struct item *iter; - for (iter = get_list (item); iter; iter = iter->next) - length++; - success = push (ctx, new_integer (length)); - break; - } - default: - success = set_error (ctx, "invalid type"); - } - item_free (item); - return success; -} - -// - - Stack operations - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -defn (fn_dup) -{ - check_stack (1); - return push (ctx, new_clone (ctx->stack)); -} - -defn (fn_drop) -{ - check_stack (1); - item_free (pop (ctx)); - return true; -} - -defn (fn_swap) -{ - check_stack (2); - struct item *second = pop (ctx), *first = pop (ctx); - return push (ctx, second) && push (ctx, first); -} - -defn (fn_call) -{ - check_stack (1); - struct item *script = pop (ctx); - bool success = check_type (ctx, script, ITEM_LIST) - && execute (ctx, get_list (script)); - item_free (script); - return success; -} - -defn (fn_dip) -{ - check_stack (2); - struct item *script = pop (ctx); - struct item *item = pop (ctx); - bool success = check_type (ctx, script, ITEM_LIST) - && execute (ctx, get_list (script)); - item_free (script); - if (!success) - { - item_free (item); - return false; - } - return push (ctx, item); -} - -defn (fn_unit) -{ - check_stack (1); - struct item *item = pop (ctx); - return push (ctx, new_list (item)); -} - -defn (fn_cons) -{ - check_stack (2); - struct item *list = pop (ctx); - struct item *item = pop (ctx); - if (!check_type (ctx, list, ITEM_LIST)) - { - item_free (list); - item_free (item); - return false; - } - item->next = get_list (list); - ((struct item_list *) list)->head = item; - return push (ctx, list); -} - -defn (fn_cat) -{ - check_stack (2); - struct item *scnd = pop (ctx); - struct item *frst = pop (ctx); - if (!check_type (ctx, frst, ITEM_LIST) - || !check_type (ctx, scnd, ITEM_LIST)) - { - item_free (frst); - item_free (scnd); - return false; - } - - // XXX: we shouldn't have to do this in O(n) - struct item **tail = &((struct item_list *) frst)->head; - while (*tail) - tail = &(*tail)->next; - *tail = get_list (scnd); - - ((struct item_list *) scnd)->head = NULL; - item_free (scnd); - return push (ctx, frst); -} - -defn (fn_uncons) -{ - check_stack (1); - struct item *list = pop (ctx); - if (!check_type (ctx, list, ITEM_LIST)) - goto fail; - struct item *first = get_list (list); - if (!first) - { - set_error (ctx, "list is empty"); - goto fail; - } - ((struct item_list *) list)->head = first->next; - first->next = NULL; - return push (ctx, first) && push (ctx, list); -fail: - item_free (list); - return false; -} - -// - - Logical - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -static bool -to_boolean (struct context *ctx, struct item *item, bool *ok) -{ - switch (item->type) - { - case ITEM_STRING: - return *get_string (item) != '\0'; - case ITEM_INTEGER: - return get_integer (item) != 0; - case ITEM_FLOAT: - return get_float (item) != 0.; - default: - return (*ok = set_error (ctx, "cannot convert `%s' to boolean", - item_type_to_str (item->type))); - } -} - -defn (fn_not) -{ - check_stack (1); - struct item *item = pop (ctx); - bool ok = true; - bool result = !to_boolean (ctx, item, &ok); - item_free (item); - return ok && push (ctx, new_integer (result)); -} - -defn (fn_and) -{ - check_stack (2); - struct item *op1 = pop (ctx); - struct item *op2 = pop (ctx); - bool ok = true; - bool result = to_boolean (ctx, op1, &ok) && to_boolean (ctx, op2, &ok); - item_free (op1); - item_free (op2); - return ok && push (ctx, new_integer (result)); -} - -defn (fn_or) -{ - check_stack (2); - struct item *op1 = pop (ctx); - struct item *op2 = pop (ctx); - bool ok = true; - bool result = to_boolean (ctx, op1, &ok) - || !ok || to_boolean (ctx, op2, &ok); - item_free (op1); - item_free (op2); - return ok && push (ctx, new_integer (result)); -} - -// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -defn (fn_if) -{ - check_stack (3); - struct item *else_ = pop (ctx); - struct item *then_ = pop (ctx); - struct item *cond_ = pop (ctx); - - bool ok = true; - bool condition = to_boolean (ctx, cond_, &ok); - item_free (cond_); - - bool success = false; - if (ok - && check_type (ctx, then_, ITEM_LIST) - && check_type (ctx, else_, ITEM_LIST)) - success = execute (ctx, condition - ? get_list (then_) - : get_list (else_)); - - item_free (then_); - item_free (else_); - return success; -} - -defn (fn_try) -{ - check_stack (2); - struct item *catch = pop (ctx); - struct item *try = pop (ctx); - bool success = false; - if (!check_type (ctx, try, ITEM_LIST) - || !check_type (ctx, catch, ITEM_LIST)) - goto fail; - - if (!execute (ctx, get_list (try))) - { - if (ctx->memory_failure || ctx->error_is_fatal) - goto fail; - - success = push (ctx, new_string (ctx->error, -1)); - free (ctx->error); - ctx->error = NULL; - - if (success) - success = execute (ctx, get_list (catch)); - } - -fail: - item_free (try); - item_free (catch); - return success; -} - -defn (fn_map) -{ - check_stack (2); - struct item *fn = pop (ctx); - struct item *list = pop (ctx); - if (!check_type (ctx, fn, ITEM_LIST) - || !check_type (ctx, list, ITEM_LIST)) - { - item_free (fn); - item_free (list); - return false; - } - - bool success = false; - struct item *result = NULL, **tail = &result; - for (struct item *iter = get_list (list); iter; iter = iter->next) - { - if (!push (ctx, new_clone (iter)) - || !execute (ctx, get_list (fn)) - || !check_stack_safe (ctx, 1)) - goto fail; - - struct item *item = pop (ctx); - *tail = item; - tail = &item->next; - } - success = true; - -fail: - set_list (list, result); - item_free (fn); - if (!success) - { - item_free (list); - return false; - } - return push (ctx, list); -} - -defn (fn_filter) -{ - check_stack (2); - struct item *fn = pop (ctx); - struct item *list = pop (ctx); - if (!check_type (ctx, fn, ITEM_LIST) - || !check_type (ctx, list, ITEM_LIST)) - { - item_free (fn); - item_free (list); - return false; - } - - bool success = false; - bool ok = true; - struct item *result = NULL, **tail = &result; - for (struct item *iter = get_list (list); iter; iter = iter->next) - { - if (!push (ctx, new_clone (iter)) - || !execute (ctx, get_list (fn)) - || !check_stack_safe (ctx, 1)) - goto fail; - - struct item *item = pop (ctx); - bool survived = to_boolean (ctx, item, &ok); - item_free (item); - if (!ok) - goto fail; - if (!survived) - continue; - - if (!(item = new_clone (iter))) - goto fail; - *tail = item; - tail = &item->next; - } - success = true; - -fail: - set_list (list, result); - item_free (fn); - if (!success) - { - item_free (list); - return false; - } - return push (ctx, list); -} - -defn (fn_fold) -{ - check_stack (3); - struct item *op = pop (ctx); - struct item *null = pop (ctx); - struct item *list = pop (ctx); - bool success = false; - if (!check_type (ctx, op, ITEM_LIST) - || !check_type (ctx, list, ITEM_LIST)) - { - item_free (null); - goto fail; - } - - push (ctx, null); - for (struct item *iter = get_list (list); iter; iter = iter->next) - if (!push (ctx, new_clone (iter)) - || !execute (ctx, get_list (op))) - goto fail; - success = true; - -fail: - item_free (op); - item_free (list); - return success; -} - -defn (fn_each) -{ - check_stack (2); - struct item *op = pop (ctx); - struct item *list = pop (ctx); - bool success = false; - if (!check_type (ctx, op, ITEM_LIST) - || !check_type (ctx, list, ITEM_LIST)) - goto fail; - - for (struct item *iter = get_list (list); iter; iter = iter->next) - if (!push (ctx, new_clone (iter)) - || !execute (ctx, get_list (op))) - goto fail; - success = true; - -fail: - item_free (op); - item_free (list); - return success; -} - -// - - Arithmetic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// XXX: why not a `struct item_string *` argument? -static bool -push_repeated_string (struct context *ctx, struct item *op1, struct item *op2) -{ - struct item_string *string = (struct item_string *) op1; - struct item_integer *repeat = (struct item_integer *) op2; - assert (string->type == ITEM_STRING); - assert (repeat->type == ITEM_INTEGER); - - if (repeat->value < 0) - return set_error (ctx, "cannot multiply a string by a negative value"); - - char *buf = NULL; - size_t len = string->len * repeat->value; - if (len < string->len && repeat->value != 0) - goto allocation_fail; - - buf = malloc (len); - if (!buf) - goto allocation_fail; - - for (size_t i = 0; i < len; i += string->len) - memcpy (buf + i, string->value, string->len); - struct item *item = new_string (buf, len); - free (buf); - return push (ctx, item); - -allocation_fail: - ctx->memory_failure = true; - return false; -} - -defn (fn_times) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_integer (op1) * get_integer (op2))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_integer (op1) * get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_float (op1) * get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_float (get_float (op1) * get_integer (op2))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_STRING) - ok = push_repeated_string (ctx, op2, op1); - else if (op1->type == ITEM_STRING && op2->type == ITEM_INTEGER) - ok = push_repeated_string (ctx, op1, op2); - else - ok = set_error (ctx, "cannot multiply `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -defn (fn_pow) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - // TODO: implement this properly, outputting an integer - ok = push (ctx, new_float (powl (get_integer (op1), get_integer (op2)))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (powl (get_integer (op1), get_float (op2)))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (powl (get_float (op1), get_float (op2)))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_float (powl (get_float (op1), get_integer (op2)))); - else - ok = set_error (ctx, "cannot exponentiate `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -defn (fn_div) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - { - if (get_integer (op2) == 0) - ok = set_error (ctx, "division by zero"); - else - ok = push (ctx, new_integer (get_integer (op1) / get_integer (op2))); - } - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_integer (op1) / get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_float (op1) / get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_float (get_float (op1) / get_integer (op2))); - else - ok = set_error (ctx, "cannot divide `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -defn (fn_mod) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - { - if (get_integer (op2) == 0) - ok = set_error (ctx, "division by zero"); - else - ok = push (ctx, new_integer (get_integer (op1) % get_integer (op2))); - } - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (fmodl (get_integer (op1), get_float (op2)))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (fmodl (get_float (op1), get_float (op2)))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_float (fmodl (get_float (op1), get_integer (op2)))); - else - ok = set_error (ctx, "cannot divide `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -static bool -push_concatenated_string (struct context *ctx, - struct item *op1, struct item *op2) -{ - struct item_string *s1 = (struct item_string *) op1; - struct item_string *s2 = (struct item_string *) op2; - assert (s1->type == ITEM_STRING); - assert (s2->type == ITEM_STRING); - - char *buf = NULL; - size_t len = s1->len + s2->len; - if (len < s1->len || len < s2->len) - goto allocation_fail; - - buf = malloc (len); - if (!buf) - goto allocation_fail; - - memcpy (buf, s1->value, s1->len); - memcpy (buf + s1->len, s2->value, s2->len); - struct item *item = new_string (buf, len); - free (buf); - return push (ctx, item); - -allocation_fail: - ctx->memory_failure = true; - return false; - -} - -defn (fn_plus) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_integer (op1) + get_integer (op2))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_integer (op1) + get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_float (op1) + get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_float (get_float (op1) + get_integer (op2))); - else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING) - ok = push_concatenated_string (ctx, op1, op2); - else - ok = set_error (ctx, "cannot add `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -defn (fn_minus) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_integer (op1) - get_integer (op2))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_integer (op1) - get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_float (get_float (op1) - get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_float (get_float (op1) - get_integer (op2))); - else - ok = set_error (ctx, "cannot subtract `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -// - - Comparison - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -static int -compare_strings (struct item_string *s1, struct item_string *s2) -{ - // XXX: not entirely correct wrt. null bytes - size_t len = (s1->len < s2->len ? s1->len : s2->len) + 1; - return memcmp (s1->value, s2->value, len); -} - -static bool compare_lists (struct item *, struct item *); - -static bool -compare_list_items (struct item *op1, struct item *op2) -{ - if (op1->type != op2->type) - return false; - - switch (op1->type) - { - case ITEM_STRING: - case ITEM_WORD: - return !compare_strings ((struct item_string *) op1, - (struct item_string *) op2); - case ITEM_FLOAT: - return get_float (op1) == get_float (op2); - case ITEM_INTEGER: - return get_integer (op1) == get_integer (op2); - case ITEM_LIST: - return compare_lists (get_list (op1), get_list (op2)); - } - abort (); -} - -static bool -compare_lists (struct item *op1, struct item *op2) -{ - while (op1 && op2) - { - if (!compare_list_items (op1, op2)) - return false; - - op1 = op1->next; - op2 = op2->next; - } - return !op1 && !op2; -} - -defn (fn_eq) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_integer (op1) == get_integer (op2))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_integer (get_integer (op1) == get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_integer (get_float (op1) == get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_float (op1) == get_integer (op2))); - else if (op1->type == ITEM_LIST && op2->type == ITEM_LIST) - ok = push (ctx, new_integer (compare_lists - (get_list (op1), get_list (op2)))); - else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING) - ok = push (ctx, new_integer (compare_strings - ((struct item_string *)(op1), (struct item_string *)(op2)) == 0)); - else - ok = set_error (ctx, "cannot compare `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -defn (fn_lt) -{ - check_stack (2); - struct item *op2 = pop (ctx); - struct item *op1 = pop (ctx); - - bool ok; - if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_integer (op1) < get_integer (op2))); - else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) - ok = push (ctx, new_integer (get_integer (op1) < get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) - ok = push (ctx, new_integer (get_float (op1) < get_float (op2))); - else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) - ok = push (ctx, new_integer (get_float (op1) < get_integer (op2))); - else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING) - ok = push (ctx, new_integer (compare_strings - ((struct item_string *)(op1), (struct item_string *)(op2)) < 0)); - else - ok = set_error (ctx, "cannot compare `%s' and `%s'", - item_type_to_str (op1->type), item_type_to_str (op2->type)); - - item_free (op1); - item_free (op2); - return ok; -} - -// - - Utilities - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -defn (fn_rand) -{ - return push (ctx, new_float ((long double) rand () - / ((long double) RAND_MAX + 1))); -} - -defn (fn_time) -{ - return push (ctx, new_integer (time (NULL))); -} - -// XXX: this is a bit too constrained; combines strftime() with gmtime() -defn (fn_strftime) -{ - check_stack (2); - struct item *format = pop (ctx); - struct item *time_ = pop (ctx); - bool success = false; - if (!check_type (ctx, time_, ITEM_INTEGER) - || !check_type (ctx, format, ITEM_STRING)) - goto fail; - - if (get_integer (time_) < 0) - { - set_error (ctx, "invalid time value"); - goto fail; - } - - char buf[128]; - time_t time__ = get_integer (time_); - struct tm tm; - gmtime_r (&time__, &tm); - buf[strftime (buf, sizeof buf, get_string (format), &tm)] = '\0'; - success = push (ctx, new_string (buf, -1)); - -fail: - item_free (time_); - item_free (format); - return success; -} - -// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -static void item_list_to_str (const struct item *, struct buffer *); - -static void -string_to_str (const struct item_string *string, struct buffer *buf) -{ - buffer_append_c (buf, '"'); - for (size_t i = 0; i < string->len; i++) - { - char c = string->value[i]; - if (c == '\n') buffer_append (buf, "\\n", 2); - else if (c == '\r') buffer_append (buf, "\\r", 2); - else if (c == '\t') buffer_append (buf, "\\t", 2); - else if (!isprint (c)) - { - char tmp[8]; - snprintf (tmp, sizeof tmp, "\\x%02x", (unsigned char) c); - buffer_append (buf, tmp, strlen (tmp)); - } - else if (c == '\\') buffer_append (buf, "\\\\", 2); - else if (c == '"') buffer_append (buf, "\\\"", 2); - else buffer_append_c (buf, c); - } - buffer_append_c (buf, '"'); -} - -static void -item_to_str (const struct item *item, struct buffer *buf) -{ - switch (item->type) - { - char *x; - case ITEM_STRING: - string_to_str ((struct item_string *) item, buf); - break; - case ITEM_WORD: - { - struct item_word *word = (struct item_word *) item; - buffer_append (buf, word->value, word->len); - break; - } - case ITEM_INTEGER: - if (!(x = strdup_printf ("%lld", get_integer (item)))) - goto alloc_failure; - buffer_append (buf, x, strlen (x)); - free (x); - break; - case ITEM_FLOAT: - if (!(x = strdup_printf ("%Lf", get_float (item)))) - goto alloc_failure; - buffer_append (buf, x, strlen (x)); - free (x); - break; - case ITEM_LIST: - buffer_append_c (buf, '['); - item_list_to_str (get_list (item), buf); - buffer_append_c (buf, ']'); - break; - } - return; - -alloc_failure: - // This is a bit hackish but it simplifies stuff - buf->memory_failure = true; - free (buf->s); - buf->s = NULL; -} - -static void -item_list_to_str (const struct item *script, struct buffer *buf) -{ - if (!script) - return; - - item_to_str (script, buf); - while ((script = script->next)) - { - buffer_append_c (buf, ' '); - item_to_str (script, buf); - } -} - -// --- IRC protocol ------------------------------------------------------------ - -struct message -{ - char *prefix; ///< Message prefix - char *command; ///< IRC command - char *params[16]; ///< Command parameters (0-terminated) - size_t n_params; ///< Number of parameters present -}; - -inline static char * -cut_word (char **s) -{ - char *start = *s, *end = *s + strcspn (*s, " "); - *s = end + strspn (end, " "); - *end = '\0'; - return start; -} - -static bool -parse_message (char *s, struct message *msg) -{ - memset (msg, 0, sizeof *msg); - - // Ignore IRC 3.2 message tags, if present - if (*s == '@') - { - s += strcspn (s, " "); - s += strspn (s, " "); - } - - // Prefix - if (*s == ':') - msg->prefix = cut_word (&s) + 1; - - // Command - if (!*(msg->command = cut_word (&s))) - return false; - - // Parameters - while (*s) - { - size_t n = msg->n_params++; - if (msg->n_params >= N_ELEMENTS (msg->params)) - return false; - if (*s == ':') - { - msg->params[n] = ++s; - break; - } - msg->params[n] = cut_word (&s); - } - return true; -} - -static struct message * -read_message (void) -{ - static bool discard = false; - static char buf[1025]; - static struct message msg; - - bool discard_this; - do - { - if (!fgets (buf, sizeof buf, stdin)) - return NULL; - size_t len = strlen (buf); - - // Just to be on the safe side, if the line overflows our buffer, - // ignore everything up until the next line. - discard_this = discard; - if (len >= 2 && !strcmp (buf + len - 2, "\r\n")) - { - buf[len -= 2] = '\0'; - discard = false; - } - else - discard = true; - } - // Invalid messages are silently ignored - while (discard_this || !parse_message (buf, &msg)); - return &msg; -} - -// --- Interfacing with the bot ------------------------------------------------ - -#define BOT_PRINT "ZYKLONB print :script: " - -static const char * -get_config (const char *key) -{ - printf ("ZYKLONB get_config :%s\r\n", key); - struct message *msg = read_message (); - if (!msg || msg->n_params <= 0) - exit (EXIT_FAILURE); - return msg->params[0]; -} - -// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -// TODO: implement more functions; try to avoid writing them in C - -static bool -init_runtime_library_scripts (void) -{ - bool ok = true; - - // It's much cheaper (and more fun) to define functions in terms of other - // ones. The "unit tests" serve a secondary purpose of showing the usage. - struct script - { - const char *name; ///< Name of the function - const char *definition; ///< The defining script - const char *unit_test; ///< Trivial unit test, must return 1 - } - scripts[] = - { - { "nip", "swap drop", "1 2 nip 2 =" }, - { "over", "[dup] dip swap", "1 2 over nip nip 1 =" }, - { "swons", "swap cons", "[2] 1 swons [1 2] =" }, - { "first", "uncons drop", "[1 2 3] first 1 =" }, - { "rest", "uncons swap drop", "[1 2 3] rest [2 3] =" }, - { "reverse", "[] swap [swap cons] each", "[1 2] reverse [2 1] =" }, - { "curry", "cons", "1 2 [+] curry call 3 =" }, - - { "xor", "not swap not + 1 =", "1 1 xor 0 =" }, - { "min", "over over < [drop] [nip] if", "1 2 min 1 =" }, - { "max", "over over > [drop] [nip] if", "1 2 max 2 =" }, - - { "all?", "[and] cat 1 swap fold", "[3 4 5] [> 3] all? 0 =" }, - { "any?", "[or] cat 0 swap fold", "[3 4 5] [> 3] any? 1 =" }, - - { ">", "swap <", "1 2 > 0 =" }, - { "!=", "= not", "1 2 != 1 =" }, - { "<=", "> not", "1 2 <= 1 =" }, - { ">=", "< not", "1 2 >= 0 =" }, - - // XXX: this is a bit crazy and does not work with an empty list - { "join", "[uncons] dip swap [[dup] dip swap [+ +] dip] each drop", - "[1 2 3] [>string] map \" -> \" join \"1 -> 2 -> 3\" =" }, - }; - - for (size_t i = 0; i < N_ELEMENTS (scripts); i++) - { - const char *error = NULL; - struct item *script = parse (scripts[i].definition, &error); - if (error) - { - printf (BOT_PRINT "error parsing internal script `%s': %s\r\n", - scripts[i].definition, error); - ok = false; - } - else - ok &= register_script (scripts[i].name, script); - } - - struct context ctx; - for (size_t i = 0; i < N_ELEMENTS (scripts); i++) - { - const char *error = NULL; - struct item *script = parse (scripts[i].unit_test, &error); - if (error) - { - printf (BOT_PRINT "error parsing unit test for `%s': %s\r\n", - scripts[i].name, error); - ok = false; - continue; - } - context_init (&ctx); - execute (&ctx, script); - item_free_list (script); - - const char *failure = NULL; - if (ctx.memory_failure) - failure = "memory allocation failure"; - else if (ctx.error) - failure = ctx.error; - else if (ctx.stack_size != 1) - failure = "too many results on the stack"; - else if (ctx.stack->type != ITEM_INTEGER) - failure = "result is not an integer"; - else if (get_integer (ctx.stack) != 1) - failure = "wrong test result"; - if (failure) - { - printf (BOT_PRINT "error executing unit test for `%s': %s\r\n", - scripts[i].name, failure); - ok = false; - } - context_free (&ctx); - } - return ok; -} - -static bool -init_runtime_library (void) -{ - bool ok = true; - - // Type detection - ok &= register_handler ("string?", fn_is_string); - ok &= register_handler ("word?", fn_is_word); - ok &= register_handler ("integer?", fn_is_integer); - ok &= register_handler ("float?", fn_is_float); - ok &= register_handler ("list?", fn_is_list); - - // Type conversion - ok &= register_handler (">string", fn_to_string); - ok &= register_handler (">integer", fn_to_integer); - ok &= register_handler (">float", fn_to_float); - - // Miscellaneous - ok &= register_handler ("length", fn_length); - - // Basic stack manipulation - ok &= register_handler ("dup", fn_dup); - ok &= register_handler ("drop", fn_drop); - ok &= register_handler ("swap", fn_swap); - - // Calling stuff - ok &= register_handler ("call", fn_call); - ok &= register_handler ("dip", fn_dip); - - // Control flow - ok &= register_handler ("if", fn_if); - ok &= register_handler ("try", fn_try); - - // List processing - ok &= register_handler ("map", fn_map); - ok &= register_handler ("filter", fn_filter); - ok &= register_handler ("fold", fn_fold); - ok &= register_handler ("each", fn_each); - - // List manipulation - ok &= register_handler ("unit", fn_unit); - ok &= register_handler ("cons", fn_cons); - ok &= register_handler ("cat", fn_cat); - ok &= register_handler ("uncons", fn_uncons); - - // Arithmetic operations - ok &= register_handler ("+", fn_plus); - ok &= register_handler ("-", fn_minus); - ok &= register_handler ("*", fn_times); - ok &= register_handler ("^", fn_pow); - ok &= register_handler ("/", fn_div); - ok &= register_handler ("%", fn_mod); - - // Comparison - ok &= register_handler ("=", fn_eq); - ok &= register_handler ("<", fn_lt); - - // Logical operations - ok &= register_handler ("not", fn_not); - ok &= register_handler ("and", fn_and); - ok &= register_handler ("or", fn_or); - - // Utilities - ok &= register_handler ("rand", fn_rand); - ok &= register_handler ("time", fn_time); - ok &= register_handler ("strftime", fn_strftime); - - ok &= init_runtime_library_scripts (); - return ok; -} - -static void -free_runtime_library (void) -{ - struct fn *next, *iter; - for (iter = g_functions; iter; iter = next) - { - next = iter->next; - free_function (iter); - } -} - -// --- Function database ------------------------------------------------------- - -// TODO: a global variable storing the various procedures (db) -// XXX: defining procedures would ideally need some kind of an ACL - -static void -read_db (void) -{ - // TODO -} - -static void -write_db (void) -{ - // TODO -} - -// --- Main -------------------------------------------------------------------- - -static char *g_prefix; - -struct user_info -{ - char *ctx; ///< Context: channel or user - char *ctx_quote; ///< Reply quotation -}; - -defn (fn_dot) -{ - check_stack (1); - struct item *item = pop (ctx); - struct user_info *info = ctx->user_data; - - struct buffer buf = BUFFER_INITIALIZER; - item_to_str (item, &buf); - item_free (item); - buffer_append_c (&buf, '\0'); - if (buf.memory_failure) - { - ctx->memory_failure = true; - return false; - } - - if (buf.len > 255) - buf.s[255] = '\0'; - - printf ("PRIVMSG %s :%s%s\r\n", info->ctx, info->ctx_quote, buf.s); - free (buf.s); - return true; -} - -static void -process_message (struct message *msg) -{ - if (!msg->prefix - || strcasecmp (msg->command, "PRIVMSG") - || msg->n_params < 2) - return; - char *line = msg->params[1]; - - // Filter out only our commands - size_t prefix_len = strlen (g_prefix); - if (strncmp (line, g_prefix, prefix_len)) - return; - line += prefix_len; - - char *command = cut_word (&line); - if (strcasecmp (command, "script")) - return; - - // Retrieve information on how to respond back - char *msg_ctx = msg->prefix, *x; - if ((x = strchr (msg_ctx, '!'))) - *x = '\0'; - - char *msg_ctx_quote; - if (strchr ("#+&!", *msg->params[0])) - { - msg_ctx_quote = strdup_printf ("%s: ", msg_ctx); - msg_ctx = msg->params[0]; - } - else - msg_ctx_quote = strdup (""); - - if (!msg_ctx_quote) - { - printf (BOT_PRINT "%s\r\n", "memory allocation failure"); - return; - } - - struct user_info info; - info.ctx = msg_ctx; - info.ctx_quote = msg_ctx_quote; - - // Finally parse and execute the macro - const char *error = NULL; - struct item *script = parse (line, &error); - if (error) - { - printf ("PRIVMSG %s :%s%s: %s\r\n", - msg_ctx, msg_ctx_quote, "parse error", error); - goto end; - } - - struct context ctx; - context_init (&ctx); - ctx.user_data = &info; - execute (&ctx, script); - item_free_list (script); - - const char *failure = NULL; - if (ctx.memory_failure) - failure = "memory allocation failure"; - else if (ctx.error) - failure = ctx.error; - if (failure) - printf ("PRIVMSG %s :%s%s: %s\r\n", - msg_ctx, msg_ctx_quote, "runtime error", failure); - context_free (&ctx); -end: - free (msg_ctx_quote); -} - -int -main (int argc, char *argv[]) -{ - freopen (NULL, "rb", stdin); setvbuf (stdin, NULL, _IOLBF, BUFSIZ); - freopen (NULL, "wb", stdout); setvbuf (stdout, NULL, _IOLBF, BUFSIZ); - - struct rlimit limit = - { - .rlim_cur = ADDRESS_SPACE_LIMIT, - .rlim_max = ADDRESS_SPACE_LIMIT - }; - - // Lower the memory limits to something sensible to prevent abuse - (void) setrlimit (RLIMIT_AS, &limit); - - read_db (); - if (!init_runtime_library () - || !register_handler (".", fn_dot)) - printf (BOT_PRINT "%s\r\n", "runtime library initialization failed"); - - g_prefix = strdup (get_config ("prefix")); - printf ("ZYKLONB register\r\n"); - struct message *msg; - while ((msg = read_message ())) - process_message (msg); - - free_runtime_library (); - free (g_prefix); - return 0; -} - diff --git a/plugins/youtube b/plugins/youtube deleted file mode 100755 index 5614860..0000000 --- a/plugins/youtube +++ /dev/null @@ -1,111 +0,0 @@ -#!/usr/bin/env python3 -# -# ZyklonB YouTube plugin, displaying info about YouTube links -# -# Copyright 2014 - 2015, Přemysl Janouch -# See the file LICENSE for licensing information. -# - -import sys -import io -import re -import json -import urllib.request - -class Plugin: - re_msg = re.compile ('(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?' - '([^ ]+)(?: +(.*))?\r\n$') - re_args = re.compile (':?((?<=:).*|[^ ]+) *') - - def parse (self, line): - m = self.re_msg.match (line) - if m is None: - return None - - (nick, user, host, command, args) = m.groups () - args = [] if args is None else self.re_args.findall (args) - return (nick, user, host, command, args) - - def get_config (self, key): - print ("ZYKLONB get_config :%s" % key) - (_, _, _, _, args) = self.parse (sys.stdin.readline ()) - return args[0] - - def bot_print (self, what): - print ('ZYKLONB print :%s' % what) - -class YouTube (Plugin): - re_videos = [re.compile (x) for x in [ - r'youtube\.[a-z]+/[^ ]*[&?]v=([-\w]+)', - r'youtube\.[a-z]+/v/([-\w]+)', - r'youtu\.be/([-\w]+)' - ]] - re_playlists = [re.compile (x) for x in [ - r'youtube\.[a-z]+/playlist[&?][^ ]*(?<=&|\?)list=([-\w]+)', - ]] - - def print_info (self, channel, url, cb): - try: - data = json.loads (urllib.request.urlopen - (url, None, 30).read ().decode ('utf-8')) - - for line in map (lambda x: "YouTube: " + cb (x), data['items']): - print ("PRIVMSG %s :%s" % (channel, - line.encode ('utf-8').decode ('iso8859-1'))) - - except Exception as err: - self.bot_print ('youtube: %s' % (err)) - - def print_video_info (self, channel, video_id): - url = 'https://www.googleapis.com/youtube/v3/' \ - + 'videos?id=%s&key=%s&part=snippet,contentDetails,statistics' \ - % (video_id, self.youtube_api_key) - self.print_info (channel, url, lambda x: "%s | %s | %sx" % ( - x['snippet']['title'], - x['contentDetails']['duration'][2:].lower (), - x['statistics']['viewCount'])) - - def print_playlist_info (self, channel, playlist_id): - url = 'https://www.googleapis.com/youtube/v3/' \ - + 'playlists?id=%s&key=%s&part=snippet,contentDetails' \ - % (playlist_id, self.youtube_api_key) - self.print_info (channel, url, lambda x: "%s | %d videos" % ( - x['snippet']['title'], - x['contentDetails']['itemCount'])) - - def process_line (self, line): - msg = self.parse (line) - if msg is None: - return - - (nick, user, host, command, args) = msg - if command != 'PRIVMSG' or len (args) < 2: - return - - ctx = args[0] - if not ctx.startswith (('#', '+', '&', '!')): - ctx = nick - - for regex in self.re_videos: - for i in regex.findall (args[1]): - self.print_video_info (ctx, i) - for regex in self.re_playlists: - for i in regex.findall (args[1]): - self.print_playlist_info (ctx, i) - - def run (self): - self.youtube_api_key = self.get_config ('youtube_api_key') - if self.youtube_api_key == "": - self.bot_print ("youtube: missing `youtube_api_key'") - - print ("ZYKLONB register") - - for line in sys.stdin: - self.process_line (line) - -sys.stdin = io.TextIOWrapper (sys.__stdin__.buffer, - encoding = 'iso8859-1', newline = '\r\n', line_buffering = True) -sys.stdout = io.TextIOWrapper (sys.__stdout__.buffer, - encoding = 'iso8859-1', newline = '\r\n', line_buffering = True) - -YouTube ().run () diff --git a/plugins/zyklonb/coin b/plugins/zyklonb/coin new file mode 100755 index 0000000..65967ad --- /dev/null +++ b/plugins/zyklonb/coin @@ -0,0 +1,128 @@ +#!/usr/bin/env tclsh +# +# ZyklonB coin plugin, random number-based utilities +# +# Copyright 2012, 2014 Přemysl Janouch +# See the file LICENSE for licensing information. +# + +# This is a terrible excuse for a programming language and I feel dirty. + +proc parse {line} { + global msg + unset -nocomplain msg + + if [regexp {^:([^ ]*) *(.*)} $line -> prefix rest] { + set msg(prefix) $prefix + set line $rest + } + if [regexp {^([^ ]*) *(.*)} $line -> command rest] { + set msg(command) $command + set line $rest + } + while {1} { + set line [string trimleft $line " "] + set i [string first " " $line] + if {$i == -1} { set i [string length $line] } + if {$i == 0} { break } + + if {[string index $line 0] == ":"} { + lappend msg(param) [string range $line 1 end] + break + } + lappend msg(param) [string range $line 0 [expr $i - 1]] + set line [string range $line $i end] + } +} + +proc get_config {key} { + global msg + puts "ZYKLONB get_config :$key" + gets stdin line + parse $line + return [lindex $msg(param) 0] +} + +proc pmrespond {text} { + global ctx + global ctx_quote + puts "PRIVMSG $ctx :$ctx_quote$text" +} + +fconfigure stdin -translation crlf -encoding iso8859-1 +fconfigure stdout -translation crlf -encoding iso8859-1 + +set prefix [get_config prefix] +puts "ZYKLONB register" + +set eightball [list \ + "It is certain" \ + "It is decidedly so" \ + "Without a doubt" \ + "Yes - definitely" \ + "You may rely on it" \ + "As I see it, yes" \ + "Most likely" \ + "Outlook good" \ + "Yes" \ + "Signs point to yes" \ + "Reply hazy, try again" \ + "Ask again later" \ + "Better not tell you now" \ + "Cannot predict now" \ + "Concentrate and ask again" \ + "Don't count on it" \ + "My reply is no" \ + "My sources say no" \ + "Outlook not so good" \ + "Very doubtful"] + +while {[gets stdin line] != -1} { + parse $line + + if {! [info exists msg(prefix)] || ! [info exists msg(command)] + || $msg(command) != "PRIVMSG" || ! [info exists msg(param)] + || [llength $msg(param)] < 2} { continue } + + regexp {^[^!]*} $msg(prefix) ctx + if [regexp {^[#&+!]} [lindex $msg(param) 0]] { + set ctx_quote "$ctx: " + set ctx [lindex $msg(param) 0] + } else { set ctx_quote "" } + + set input [lindex $msg(param) 1] + set first_chars [string range $input 0 \ + [expr [string length $prefix] - 1]] + if {$first_chars != $prefix} { continue } + set input [string range $input [string length $prefix] end] + + if {$input == "coin"} { + if {rand() < 0.5} { + pmrespond "Heads." + } else { + pmrespond "Tails." + } + } elseif {[regexp {^dice( +|$)(.*)} $input -> _ args]} { + if {! [string is integer -strict $args] || $args <= 0} { + pmrespond "Invalid or missing number." + } else { + pmrespond [expr {int($args * rand()) + 1}] + } + } elseif {[regexp {^(choose|\?)( +|$)(.*)} $input -> _ _ args]} { + if {$args == ""} { + pmrespond "Nothing to choose from." + } else { + set c [split $args ",|"] + pmrespond [string trim [lindex $c \ + [expr {int([llength $c] * rand())}]]] + } + } elseif {[regexp {^eightball( +|$)(.*)} $input -> _ args]} { + if {$args == ""} { + pmrespond "You should, you know, ask something." + } else { + pmrespond [lindex $eightball \ + [expr {int([llength $eightball] * rand())}]]. + } + } +} + diff --git a/plugins/zyklonb/eval b/plugins/zyklonb/eval new file mode 100755 index 0000000..982d78b --- /dev/null +++ b/plugins/zyklonb/eval @@ -0,0 +1,312 @@ +#!/usr/bin/awk -f +# +# ZyklonB eval plugin, LISP-like expression evaluator +# +# Copyright 2013, 2014 Přemysl Janouch +# See the file LICENSE for licensing information. +# + +BEGIN \ +{ + RS = "\r" + ORS = "\r\n" + IGNORECASE = 1 + srand() + + prefix = get_config("prefix") + + print "ZYKLONB register" + fflush("") + + # All functions have to be in this particular array + min_args["int"] = 1 + min_args["+"] = 1 + min_args["-"] = 1 + min_args["*"] = 1 + min_args["/"] = 1 + min_args["%"] = 1 + min_args["^"] = 1 + min_args["**"] = 1 + min_args["exp"] = 1 + min_args["sin"] = 1 + min_args["cos"] = 1 + min_args["atan2"] = 2 + min_args["log"] = 1 + min_args["rand"] = 0 + min_args["sqrt"] = 1 + + min_args["pi"] = 0 + min_args["e"] = 0 + + min_args["min"] = 1 + min_args["max"] = 1 + + # Whereas here their presence is only optional + max_args["int"] = 1 + max_args["sin"] = 1 + max_args["cos"] = 1 + max_args["atan2"] = 2 + max_args["log"] = 1 + max_args["rand"] = 0 + max_args["sqrt"] = 1 + + max_args["pi"] = 0 + max_args["e"] = 0 +} + +{ + parse($0) +} + +msg_command == "PRIVMSG" \ +{ + # Context = either channel or user nickname + match(msg_prefix, /^[^!]+/) + ctx = substr(msg_prefix, RSTART, RLENGTH) + if (msg_param[0] ~ /^[#&!+]/) + { + ctx_quote = ctx ": " + ctx = msg_param[0] + } + else + ctx_quote = "" + + + if (substr(msg_param[1], 1, length(prefix)) == prefix) + { + keyword = "eval" + text = substr(msg_param[1], 1 + length(prefix)) + if (match(text, "^" keyword "([^A-Za-z0-9].*|$)")) + process_request(substr(text, 1 + length(keyword))) + } +} + +{ + fflush("") +} + +function pmrespond (text) +{ + print "PRIVMSG " ctx " :" ctx_quote text +} + +function process_request (input, res, x) +{ + delete funs + delete accumulator + delete n_args + + res = "" + fun_top = 0 + funs[0] = "" + accumulator[0] = 0 + n_args[0] = 0 + + if (match(input, "^[ \t]*")) + input = substr(input, RLENGTH + 1) + if (input == "") + res = "expression missing" + + while (res == "" && input != "") { + if (match(input, "^-?[0-9]+\\.?[0-9]*")) { + x = substr(input, RSTART, RLENGTH) + input = substr(input, RLENGTH + 1) + + match(input, "^ *") + input = substr(input, RLENGTH + 1) + + res = process_argument(x) + } else if (match(input, "^[(]([^ ()]+)")) { + x = substr(input, RSTART + 1, RLENGTH - 1) + input = substr(input, RLENGTH + 1) + + match(input, "^ *") + input = substr(input, RLENGTH + 1) + + if (!(x in min_args)) { + res = "undefined function '" x "'" + } else { + fun_top++ + funs[fun_top] = x + accumulator[fun_top] = 636363 + n_args[fun_top] = 0 + } + } else if (match(input, "^[)] *")) { + input = substr(input, RLENGTH + 1) + res = process_end() + } else + res = "invalid input at '" substr(input, 1, 10) "...'" + } + + if (res == "") { + if (fun_top != 0) + res = "unclosed '" funs[fun_top] "'" + else if (n_args[0] != 1) + res = "internal error, expected one result" \ + ", got " n_args[0] " instead" + } + + if (res == "") + pmrespond(accumulator[0]) + else + pmrespond(res) +} + +function process_argument (arg) +{ + if (fun_top == 0) { + if (n_args[0]++ != 0) + return "too many results, I only expect one" + + accumulator[0] = arg + return "" + } + + fun = funs[fun_top] + if (fun in max_args && max_args[fun] <= n_args[fun_top]) + return "too many operands for " fun + + if (fun == "int") { + accumulator[fun_top] = int(arg) + } else if (fun == "+") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else + accumulator[fun_top] += arg + } else if (fun == "-") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else + accumulator[fun_top] -= arg + } else if (fun == "*") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else + accumulator[fun_top] *= arg + } else if (fun == "/") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else if (arg == 0) + return "division by zero" + else + accumulator[fun_top] /= arg + } else if (fun == "%") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else if (arg == 0) + return "division by zero" + else + accumulator[fun_top] %= arg + } else if (fun == "^" || fun == "**" || fun == "exp") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else + accumulator[fun_top] ^= arg + } else if (fun == "sin") { + accumulator[fun_top] = sin(arg) + } else if (fun == "cos") { + accumulator[fun_top] = cos(arg) + } else if (fun == "atan2") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else + accumulator[fun_top] = atan2(accumulator[fun_top], arg) + } else if (fun == "log") { + accumulator[fun_top] = log(arg) + } else if (fun == "rand") { + # Just for completeness, execution never gets here + } else if (fun == "sqrt") { + accumulator[fun_top] = sqrt(arg) + } else if (fun == "min") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else if (accumulator[fun_top] > arg) + accumulator[fun_top] = arg + } else if (fun == "max") { + if (n_args[fun_top] == 0) + accumulator[fun_top] = arg + else if (accumulator[fun_top] < arg) + accumulator[fun_top] = arg + } else + return "internal error, unhandled operands for " fun + + n_args[fun_top]++ + return "" +} + +function process_end () +{ + if (fun_top <= 0) + return "extraneous ')'" + + fun = funs[fun_top] + if (!(fun in min_args)) + return "internal error, unhandled ')' for '" fun "'" + if (min_args[fun] > n_args[fun_top]) + return "not enough operands for '" fun "'" + + # There's no 'init' function to do it in + if (fun == "rand") + accumulator[fun_top] = rand() + else if (fun == "pi") + accumulator[fun_top] = 3.141592653589793 + else if (fun == "e") + accumulator[fun_top] = 2.718281828459045 + + return process_argument(accumulator[fun_top--]) +} + +function get_config (key) +{ + print "ZYKLONB get_config :" key + fflush("") + + getline + parse($0) + return msg_param[0] +} + +function parse (line, s, n, id, token) +{ + s = 1 + id = 0 + + # NAWK only uses the first character of RS + if (line ~ /^\n/) + line = substr(line, 2) + + msg_prefix = "" + msg_command = "" + delete msg_param + + n = match(substr(line, s), / |$/) + while (n) + { + token = substr(line, s, n - 1) + if (token ~ /^:/) + { + if (s == 1) + msg_prefix = substr(token, 2) + else + { + msg_param[id] = substr(line, s + 1) + break + } + } + else if (!msg_command) + msg_command = toupper(token) + else + msg_param[id++] = token + + s = s + n + n = index(substr(line, s), " ") + + if (!n) + { + n = length(substr(line, s)) + 1 + if (n == 1) + break; + } + } +} + diff --git a/plugins/zyklonb/pomodoro b/plugins/zyklonb/pomodoro new file mode 100755 index 0000000..8f30327 --- /dev/null +++ b/plugins/zyklonb/pomodoro @@ -0,0 +1,502 @@ +#!/usr/bin/env ruby +# coding: utf-8 +# +# ZyklonB pomodoro plugin +# +# Copyright 2015 Přemysl Janouch +# See the file LICENSE for licensing information. +# + +# --- Simple event loop -------------------------------------------------------- + +# This is more or less a straight-forward port of my C event loop. It's a bit +# unfortunate that I really have to implement all this in order to get some +# basic asynchronicity but at least I get to exercise my Ruby. + +class TimerEvent + attr_accessor :index, :when, :callback + + def initialize (callback) + raise ArgumentError unless callback.is_a? Proc + + @index = nil + @when = nil + @callback = callback + end + + def active? + @index != nil + end + + def until + return @when - Time.new + end +end + +class IOEvent + READ = 1 << 0 + WRITE = 1 << 1 + + attr_accessor :read_index, :write_index, :io, :callback + + def initialize (io, callback) + raise ArgumentError unless callback.is_a? Proc + + @read_index = nil + @write_index = nil + @io = io + @callback = callback + end +end + +class EventLoop + def initialize + @running = false + @timers = [] + @readers = [] + @writers = [] + @io_to_event = {} + end + + def set_timer (timer, timeout) + raise ArgumentError unless timer.is_a? TimerEvent + + timer.when = Time.now + timeout + if timer.index + heapify_down timer.index + heapify_up timer.index + else + timer.index = @timers.size + @timers.push timer + heapify_up timer.index + end + end + + def reset_timer (timer) + raise ArgumentError unless timer.is_a? TimerEvent + remove_timer_at timer.index if timer.index + end + + def set_io (io_event, events) + raise ArgumentError unless io_event.is_a? IOEvent + raise ArgumentError unless events.is_a? Numeric + + reset_io io_event + + @io_to_event[io_event.io] = io_event + if events & IOEvent::READ + io_event.read_index = @readers.size + @readers.push io_event.io + end + if events & IOEvent::WRITE + io_event.read_index = @writers.size + @writers.push io_event.io + end + end + + def reset_io (io_event) + raise ArgumentError unless io_event.is_a? IOEvent + + @readers.delete_at io_event.read_index if io_event.read_index + @writers.delete_at io_event.write_index if io_event.write_index + + io_event.read_index = nil + io_event.write_index = nil + + @io_to_event.delete io_event.io + end + + def run + @running = true + while @running do one_iteration end + end + + def quit + @running = false + end + +private + def one_iteration + rs, ws, = IO.select @readers, @writers, [], nearest_timeout + dispatch_timers + (Array(rs) | Array(ws)).each do |io| + @io_to_event[io].callback.call io + end + end + + def dispatch_timers + now = Time.new + while not @timers.empty? and @timers[0].when <= now do + @timers[0].callback.call + remove_timer_at 0 + end + end + + def nearest_timeout + return nil if @timers.empty? + timeout = @timers[0].until + if timeout < 0 then 0 else timeout end + end + + def remove_timer_at (index) + @timers[index].index = nil + moved = @timers.pop + return if index == @timers.size + + @timers[index] = moved + @timers[index].index = index + heapify_down index + end + + def swap_timers (a, b) + @timers[a], @timers[b] = @timers[b], @timers[a] + @timers[a].index = a + @timers[b].index = b + end + + def heapify_up (index) + while index != 0 do + parent = (index - 1) / 2 + break if @timers[parent].when <= @timers[index].when + swap_timers index, parent + index = parent + end + end + + def heapify_down (index) + loop do + parent = index + left = 2 * index + 1 + right = 2 * index + 2 + + lowest = parent + lowest = left if left < @timers.size and + @timers[left] .when < @timers[lowest].when + lowest = right if right < @timers.size and + @timers[right].when < @timers[lowest].when + break if parent == lowest + + swap_timers lowest, parent + index = lowest + end + end +end + +# --- IRC protocol ------------------------------------------------------------- + +$stdin.set_encoding 'ASCII-8BIT' +$stdout.set_encoding 'ASCII-8BIT' + +$stdin.sync = true +$stdout.sync = true + +$/ = "\r\n" +$\ = "\r\n" + +RE_MSG = /(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?([^ ]+)(?: +(.*))?$/ +RE_ARGS = /:?((?<=:).*|[^ ]+) */ + +def parse (line) + m = line.match RE_MSG + return nil if not m + + nick, user, host, command, args = *m.captures + args = if args then args.scan(RE_ARGS).flatten else [] end + [nick, user, host, command, args] +end + +def bot_print (what) + print "ZYKLONB print :#{what}" +end + +# --- Initialization ----------------------------------------------------------- + +# We can only read in configuration from here so far +# To read it from anywhere else, it has to be done asynchronously +$config = {} +[:prefix].each do |name| + print "ZYKLONB get_config :#{name}" + _, _, _, _, args = *parse($stdin.gets.chomp) + $config[name] = args[0] +end + +print "ZYKLONB register" + +# --- Plugin logic ------------------------------------------------------------- + +# FIXME: this needs a major refactor as it doesn't make much sense at all + +class MessageMeta < Struct.new(:nick, :user, :host, :channel, :ctx, :quote) + def respond (message) + print "PRIVMSG #{ctx} :#{quote}#{message}" + end +end + +class Context + attr_accessor :nick, :ctx + + def initialize (meta) + @nick = meta.nick + @ctx = meta.ctx + end + + def == (other) + self.class == other.class \ + and other.nick == @nick \ + and other.ctx == @ctx + end + + alias eql? == + + def hash + @nick.hash ^ @ctx.hash + end +end + +class PomodoroTimer + def initialize (context) + @ctx = context.ctx + @nicks = [context.nick] + + @timer_work = TimerEvent.new(lambda { on_work }) + @timer_rest = TimerEvent.new(lambda { on_rest }) + + on_work + end + + def inform (message) + # FIXME: it tells the nick even in PM's + quote = "#{@nicks.join(" ")}: " + print "PRIVMSG #{@ctx} :#{quote}#{message}" + end + + def on_work + inform "work now!" + $loop.set_timer @timer_rest, 25 * 60 + end + + def on_rest + inform "rest now!" + $loop.set_timer @timer_work, 5 * 60 + end + + def join (meta) + return if @nicks.include? meta.nick + + meta.respond "you have joined their pomodoro" + @nicks |= [meta.nick] + end + + def part (meta, requested) + return if not @nicks.include? meta.nick + + if requested + meta.respond "you have stopped your pomodoro" + end + + @nicks -= [meta.nick] + if @nicks.empty? + $loop.reset_timer @timer_work + $loop.reset_timer @timer_rest + end + end + + def status (meta) + return if not @nicks.include? meta.nick + + if @timer_rest.active? + till = @timer_rest.until + meta.respond "working, #{(till / 60).to_i} minutes, " + + "#{(till % 60).to_i} seconds until rest" + end + if @timer_work.active? + till = @timer_work.until + meta.respond "resting, #{(till / 60).to_i} minutes, " + + "#{(till % 60).to_i} seconds until work" + end + end +end + +class Pomodoro + KEYWORD = "pomodoro" + + def initialize + @timers = {} + end + + def on_help (meta, args) + meta.respond "usage: #{KEYWORD} { start | stop | join | status }" + end + + def on_start (meta, args) + if args.size != 0 + meta.respond "usage: #{KEYWORD} start" + return + end + + context = Context.new meta + if @timers[context] + meta.respond "you already have a timer running here" + else + @timers[context] = PomodoroTimer.new meta + end + end + + def on_join (meta, args) + if args.size != 1 + meta.respond "usage: #{KEYWORD} join " + return + end + + context = Context.new meta + if @timers[context] + meta.respond "you already have a timer running here" + return + end + + joined_context = Context.new meta + joined_context.nick = args.shift + timer = @timers[joined_context] + if not timer + meta.respond "that person doesn't have a timer here" + else + timer.join meta + @timers[context] = timer + end + end + + def on_stop (meta, args) + if args.size != 0 + meta.respond "usage: #{KEYWORD} stop" + return + end + + context = Context.new meta + timer = @timers[context] + if not timer + meta.respond "you don't have a timer running here" + else + timer.part meta, true + @timers.delete context + end + end + + def on_status (meta, args) + if args.size != 0 + meta.respond "usage: #{KEYWORD} status" + return + end + + timer = @timers[Context.new meta] + if not timer + meta.respond "you don't have a timer running here" + else + timer.status meta + end + end + + def process_command (meta, msg) + args = msg.split + return if args.shift != KEYWORD + + method = "on_#{args.shift}" + send method, meta, args if respond_to? method + end + + def on_server_nick (meta, command, args) + # TODO: either handle this properly... + happened = false + @timers.keys.each do |key| + next if key.nick != meta.nick + @timers[key].part meta, false + @timers.delete key + happened = true + end + if happened + # TODO: ...or at least inform the user via his new nick + end + end + + def on_server_part (meta, command, args) + # TODO: instead of cancelling the user's pomodoros, either redirect + # them to PM's and later upon rejoining undo the redirection... + context = Context.new(meta) + context.ctx = meta.channel + if @timers.include? context + # TODO: ...or at least inform the user about the cancellation + @timers[context].part meta, false + @timers.delete context + end + end + + def on_server_quit (meta, command, args) + @timers.keys.each do |key| + next if key.nick != meta.nick + @timers[key].part meta, false + @timers.delete key + end + end + + def process (meta, command, args) + method = "on_server_#{command.downcase}" + send method, meta, command, args if respond_to? method + end +end + +# --- IRC message processing --------------------------------------------------- + +$handlers = [Pomodoro.new] +def process_line (line) + msg = parse line + return if not msg + + nick, user, host, command, args = *msg + + context = nick + quote = "" + channel = nil + + if args.size >= 1 and args[0].start_with? ?#, ?+, ?&, ?! + case command + when "PRIVMSG", "NOTICE", "JOIN" + context = args[0] + quote = "#{nick}: " + channel = args[0] + when "PART" + channel = args[0] + end + end + + # Handle any IRC message + meta = MessageMeta.new(nick, user, host, channel, context, quote).freeze + $handlers.each do |handler| + handler.process meta, command, args + end + + # Handle pre-processed bot commands + if command == 'PRIVMSG' and args.size >= 2 + msg = args[1] + return unless msg.start_with? $config[:prefix] + $handlers.each do |handler| + handler.process_command meta, msg[$config[:prefix].size..-1] + end + end +end + +buffer = "" +stdin_io = IOEvent.new($stdin, lambda do |io| + begin + buffer << io.read_nonblock(4096) + lines = buffer.split $/, -1 + buffer = lines.pop + lines.each { |line| process_line line } + rescue EOFError + $loop.quit + rescue IO::WaitReadable + # Ignore + end +end) + +$loop = EventLoop.new +$loop.set_io stdin_io, IOEvent::READ +$loop.run diff --git a/plugins/zyklonb/script b/plugins/zyklonb/script new file mode 100755 index 0000000..661fbb0 --- /dev/null +++ b/plugins/zyklonb/script @@ -0,0 +1,2310 @@ +#!/usr/bin/tcc -run -lm +// +// ZyklonB scripting plugin, using a custom stack-based language +// +// Copyright 2014 Přemysl Janouch +// See the file LICENSE for licensing information. +// +// Just compile this file as usual (sans #!) if you don't feel like using TCC. +// It is a very basic and portable C99 application. It's not supposed to be +// very sophisticated, for it'd get extremely big. +// +// The main influences of the language were Factor and Joy, stripped of all +// even barely complex stuff. In its current state, it's only really useful as +// a calculator but it's got great potential for extending. +// +// If you don't like something, just change it; this is just an experiment. +// +// NOTE: it is relatively easy to abuse. Be careful. +// + +#define _XOPEN_SOURCE 500 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define ADDRESS_SPACE_LIMIT (100 * 1024 * 1024) +#include + +#if defined __GNUC__ +#define ATTRIBUTE_PRINTF(x, y) __attribute__ ((format (printf, x, y))) +#else // ! __GNUC__ +#define ATTRIBUTE_PRINTF(x, y) +#endif // ! __GNUC__ + +#define N_ELEMENTS(a) (sizeof (a) / sizeof ((a)[0])) + +// --- Utilities --------------------------------------------------------------- + +static char *strdup_printf (const char *format, ...) ATTRIBUTE_PRINTF (1, 2); + +static char * +strdup_vprintf (const char *format, va_list ap) +{ + va_list aq; + va_copy (aq, ap); + int size = vsnprintf (NULL, 0, format, aq); + va_end (aq); + if (size < 0) + return NULL; + + char buf[size + 1]; + size = vsnprintf (buf, sizeof buf, format, ap); + if (size < 0) + return NULL; + + return strdup (buf); +} + +static char * +strdup_printf (const char *format, ...) +{ + va_list ap; + va_start (ap, format); + char *result = strdup_vprintf (format, ap); + va_end (ap); + return result; +} + +// --- Generic buffer ---------------------------------------------------------- + +struct buffer +{ + char *s; ///< Buffer data + size_t alloc; ///< Number of bytes allocated + size_t len; ///< Number of bytes used + bool memory_failure; ///< Memory allocation failed +}; + +#define BUFFER_INITIALIZER { NULL, 0, 0, false } + +static bool +buffer_append (struct buffer *self, const void *s, size_t n) +{ + if (self->memory_failure) + return false; + + if (!self->s) + self->s = malloc (self->alloc = 8); + while (self->len + n > self->alloc) + self->s = realloc (self->s, self->alloc <<= 1); + + if (!self->s) + { + self->memory_failure = true; + return false; + } + + memcpy (self->s + self->len, s, n); + self->len += n; + return true; +} + +inline static bool +buffer_append_c (struct buffer *self, char c) +{ + return buffer_append (self, &c, 1); +} + +// --- Data types -------------------------------------------------------------- + +enum item_type +{ + ITEM_STRING, + ITEM_WORD, + ITEM_INTEGER, + ITEM_FLOAT, + ITEM_LIST +}; + +struct item +{ +#define ITEM_HEADER \ + enum item_type type; /**< The type of this object */ \ + struct item *next; /**< Next item on the list/stack */ + + ITEM_HEADER +}; + +struct item_string +{ + ITEM_HEADER + size_t len; ///< Length of the string (sans '\0') + char value[]; ///< The null-terminated string value +}; + +#define get_string(item) \ + (assert ((item)->type == ITEM_STRING), \ + ((struct item_string *)(item))->value) + +/// It looks like a string but it doesn't quack like a string +#define item_word item_string + +#define get_word(item) \ + (assert ((item)->type == ITEM_WORD), \ + ((struct item_word *)(item))->value) + +struct item_integer +{ + ITEM_HEADER + long long value; ///< The integer value +}; + +#define get_integer(item) \ + (assert ((item)->type == ITEM_INTEGER), \ + ((struct item_integer *)(item))->value) + +struct item_float +{ + ITEM_HEADER + long double value; ///< The floating point value +}; + +#define get_float(item) \ + (assert ((item)->type == ITEM_FLOAT), \ + ((struct item_float *)(item))->value) + +struct item_list +{ + ITEM_HEADER + struct item *head; ///< The head of the list +}; + +#define get_list(item) \ + (assert ((item)->type == ITEM_LIST), \ + ((struct item_list *)(item))->head) + +#define set_list(item, head_) \ + (assert ((item)->type == ITEM_LIST), \ + item_free_list (((struct item_list *)(item))->head), \ + ((struct item_list *)(item))->head = (head_)) + +const char * +item_type_to_str (enum item_type type) +{ + switch (type) + { + case ITEM_STRING: return "string"; + case ITEM_WORD: return "word"; + case ITEM_INTEGER: return "integer"; + case ITEM_FLOAT: return "float"; + case ITEM_LIST: return "list"; + } + abort (); +} + +// --- Item management --------------------------------------------------------- + +static void item_free_list (struct item *); +static struct item *new_clone_list (const struct item *); + +static void +item_free (struct item *item) +{ + if (item->type == ITEM_LIST) + item_free_list (get_list (item)); + free (item); +} + +static void +item_free_list (struct item *item) +{ + while (item) + { + struct item *link = item; + item = item->next; + item_free (link); + } +} + +static struct item * +new_clone (const struct item *item) +{ + size_t size; + switch (item->type) + { + case ITEM_STRING: + case ITEM_WORD: + { + const struct item_string *x = (const struct item_string *) item; + size = sizeof *x + x->len + 1; + break; + } + case ITEM_INTEGER: size = sizeof (struct item_integer); break; + case ITEM_FLOAT: size = sizeof (struct item_float); break; + case ITEM_LIST: size = sizeof (struct item_list); break; + } + + struct item *clone = malloc (size); + if (!clone) + return NULL; + + memcpy (clone, item, size); + if (item->type == ITEM_LIST) + { + struct item_list *x = (struct item_list *) clone; + if (x->head && !(x->head = new_clone_list (x->head))) + { + free (clone); + return NULL; + } + } + clone->next = NULL; + return clone; +} + +static struct item * +new_clone_list (const struct item *item) +{ + struct item *head = NULL, *clone; + for (struct item **out = &head; item; item = item->next) + { + if (!(clone = *out = new_clone (item))) + { + item_free_list (head); + return NULL; + } + clone->next = NULL; + out = &clone->next; + } + return head; +} + +static struct item * +new_string (const char *s, ssize_t len) +{ + if (len < 0) + len = strlen (s); + + struct item_string *item = calloc (1, sizeof *item + len + 1); + if (!item) + return NULL; + + item->type = ITEM_STRING; + item->len = len; + memcpy (item->value, s, len); + item->value[len] = '\0'; + return (struct item *) item; +} + +static struct item * +new_word (const char *s, ssize_t len) +{ + struct item *item = new_string (s, len); + if (!item) + return NULL; + + item->type = ITEM_WORD; + return item; +} + +static struct item * +new_integer (long long value) +{ + struct item_integer *item = calloc (1, sizeof *item); + if (!item) + return NULL; + + item->type = ITEM_INTEGER; + item->value = value; + return (struct item *) item; +} + +static struct item * +new_float (long double value) +{ + struct item_float *item = calloc (1, sizeof *item); + if (!item) + return NULL; + + item->type = ITEM_FLOAT; + item->value = value; + return (struct item *) item; +} + +static struct item * +new_list (struct item *head) +{ + struct item_list *item = calloc (1, sizeof *item); + if (!item) + return NULL; + + item->type = ITEM_LIST; + item->head = head; + return (struct item *) item; +} + +// --- Parsing ----------------------------------------------------------------- + +#define PARSE_ERROR_TABLE(XX) \ + XX( OK, NULL ) \ + XX( EOF, "unexpected end of input" ) \ + XX( INVALID_HEXA_ESCAPE, "invalid hexadecimal escape sequence" ) \ + XX( INVALID_ESCAPE, "unrecognized escape sequence" ) \ + XX( MEMORY, "memory allocation failure" ) \ + XX( FLOAT_RANGE, "floating point value out of range" ) \ + XX( INTEGER_RANGE, "integer out of range" ) \ + XX( INVALID_INPUT, "invalid input" ) \ + XX( UNEXPECTED_INPUT, "unexpected input" ) + +enum tokenizer_error +{ +#define XX(x, y) PARSE_ERROR_ ## x, + PARSE_ERROR_TABLE (XX) +#undef XX + PARSE_ERROR_COUNT +}; + +struct tokenizer +{ + const char *cursor; + enum tokenizer_error error; +}; + +static bool +decode_hexa_escape (struct tokenizer *self, struct buffer *buf) +{ + int i; + char c, code = 0; + + for (i = 0; i < 2; i++) + { + c = tolower (*self->cursor); + if (c >= '0' && c <= '9') + code = (code << 4) | (c - '0'); + else if (c >= 'a' && c <= 'f') + code = (code << 4) | (c - 'a' + 10); + else + break; + + self->cursor++; + } + + if (!i) + return false; + + buffer_append_c (buf, code); + return true; +} + +static bool +decode_octal_escape (struct tokenizer *self, struct buffer *buf) +{ + int i; + char c, code = 0; + + for (i = 0; i < 3; i++) + { + c = *self->cursor; + if (c < '0' || c > '7') + break; + + code = (code << 3) | (c - '0'); + self->cursor++; + } + + if (!i) + return false; + + buffer_append_c (buf, code); + return true; +} + +static bool +decode_escape_sequence (struct tokenizer *self, struct buffer *buf) +{ + // Support some basic escape sequences from the C language + char c; + switch ((c = *self->cursor)) + { + case '\0': + self->error = PARSE_ERROR_EOF; + return false; + case 'x': + case 'X': + self->cursor++; + if (decode_hexa_escape (self, buf)) + return true; + + self->error = PARSE_ERROR_INVALID_HEXA_ESCAPE; + return false; + default: + if (decode_octal_escape (self, buf)) + return true; + + self->cursor++; + const char *from = "abfnrtv\"\\", *to = "\a\b\f\n\r\t\v\"\\", *x; + if ((x = strchr (from, c))) + { + buffer_append_c (buf, to[x - from]); + return true; + } + + self->error = PARSE_ERROR_INVALID_ESCAPE; + return false; + } +} + +static struct item * +parse_string (struct tokenizer *self) +{ + struct buffer buf = BUFFER_INITIALIZER; + struct item *item = NULL; + char c; + + while (true) + switch ((c = *self->cursor++)) + { + case '\0': + self->cursor--; + self->error = PARSE_ERROR_EOF; + goto end; + case '"': + if (buf.memory_failure + || !(item = new_string (buf.s, buf.len))) + self->error = PARSE_ERROR_MEMORY; + goto end; + case '\\': + if (decode_escape_sequence (self, &buf)) + break; + goto end; + default: + buffer_append_c (&buf, c); + } + +end: + free (buf.s); + return item; +} + +static struct item * +try_parse_number (struct tokenizer *self) +{ + // These two standard library functions can digest a lot of various inputs, + // including NaN and +/- infinity. That may get a bit confusing. + char *float_end; + errno = 0; + long double float_value = strtold (self->cursor, &float_end); + int float_errno = errno; + + char *int_end; + errno = 0; + long long int_value = strtoll (self->cursor, &int_end, 10); + int int_errno = errno; + + // If they both fail, then this is most probably not a number. + if (float_end == int_end && float_end == self->cursor) + return NULL; + + // Only use the floating point result if it parses more characters: + struct item *item; + if (float_end > int_end) + { + if (float_errno == ERANGE) + { + self->error = PARSE_ERROR_FLOAT_RANGE; + return NULL; + } + self->cursor = float_end; + if (!(item = new_float (float_value))) + self->error = PARSE_ERROR_MEMORY; + return item; + } + else + { + if (int_errno == ERANGE) + { + self->error = PARSE_ERROR_INTEGER_RANGE; + return NULL; + } + self->cursor = int_end; + if (!(item = new_integer (int_value))) + self->error = PARSE_ERROR_MEMORY; + return item; + } +} + +static struct item * +parse_word (struct tokenizer *self) +{ + struct buffer buf = BUFFER_INITIALIZER; + struct item *item = NULL; + char c; + + // Here we accept almost anything that doesn't break the grammar + while (!strchr (" []\"", (c = *self->cursor++)) && (unsigned char) c > ' ') + buffer_append_c (&buf, c); + self->cursor--; + + if (buf.memory_failure) + self->error = PARSE_ERROR_MEMORY; + else if (!buf.len) + self->error = PARSE_ERROR_INVALID_INPUT; + else if (!(item = new_word (buf.s, buf.len))) + self->error = PARSE_ERROR_MEMORY; + + free (buf.s); + return item; +} + +static struct item *parse_item_list (struct tokenizer *); + +static struct item * +parse_list (struct tokenizer *self) +{ + struct item *list = parse_item_list (self); + if (self->error) + { + assert (list == NULL); + return NULL; + } + if (!*self->cursor) + { + self->error = PARSE_ERROR_EOF; + item_free_list (list); + return NULL; + } + assert (*self->cursor == ']'); + self->cursor++; + return new_list (list); +} + +static struct item * +parse_item (struct tokenizer *self) +{ + char c; + switch ((c = *self->cursor++)) + { + case '[': return parse_list (self); + case '"': return parse_string (self); + default:; + } + + self->cursor--; + struct item *item = try_parse_number (self); + if (!item && !self->error) + item = parse_word (self); + return item; +} + +static struct item * +parse_item_list (struct tokenizer *self) +{ + struct item *head = NULL; + struct item **tail = &head; + + char c; + bool expected = true; + while ((c = *self->cursor) && c != ']') + { + if (isspace (c)) + { + self->cursor++; + expected = true; + continue; + } + else if (!expected) + { + self->error = PARSE_ERROR_UNEXPECTED_INPUT; + goto fail; + } + + if (!(*tail = parse_item (self))) + goto fail; + tail = &(*tail)->next; + expected = false; + } + return head; + +fail: + item_free_list (head); + return NULL; +} + +static struct item * +parse (const char *s, const char **error) +{ + struct tokenizer self = { .cursor = s, .error = PARSE_ERROR_OK }; + struct item *list = parse_item_list (&self); + if (!self.error && *self.cursor != '\0') + { + self.error = PARSE_ERROR_UNEXPECTED_INPUT; + item_free_list (list); + list = NULL; + } + +#define XX(x, y) y, + static const char *strings[PARSE_ERROR_COUNT] = + { PARSE_ERROR_TABLE (XX) }; +#undef XX + + static char error_buf[128]; + if (self.error && error) + { + snprintf (error_buf, sizeof error_buf, "at character %d: %s", + (int) (self.cursor - s) + 1, strings[self.error]); + *error = error_buf; + } + return list; +} + +// --- Runtime ----------------------------------------------------------------- + +// TODO: try to think of a _simple_ way to do preemptive multitasking + +struct context +{ + struct item *stack; ///< The current top of the stack + size_t stack_size; ///< Number of items on the stack + + size_t reduction_count; ///< # of function calls so far + size_t reduction_limit; ///< The hard limit on function calls + + char *error; ///< Error information + bool error_is_fatal; ///< Whether the error can be catched + bool memory_failure; ///< Memory allocation failure + + void *user_data; ///< User data +}; + +/// Internal handler for a function +typedef bool (*handler_fn) (struct context *); + +struct fn +{ + struct fn *next; ///< The next link in the chain + + handler_fn handler; ///< Internal C handler, or NULL + struct item *script; ///< Alternatively runtime code + char name[]; ///< The name of the function +}; + +struct fn *g_functions; ///< Maps words to functions + +static void +context_init (struct context *ctx) +{ + ctx->stack = NULL; + ctx->stack_size = 0; + + ctx->reduction_count = 0; + ctx->reduction_limit = 2000; + + ctx->error = NULL; + ctx->error_is_fatal = false; + ctx->memory_failure = false; + + ctx->user_data = NULL; +} + +static void +context_free (struct context *ctx) +{ + item_free_list (ctx->stack); + ctx->stack = NULL; + + free (ctx->error); + ctx->error = NULL; +} + +static bool +set_error (struct context *ctx, const char *format, ...) +{ + free (ctx->error); + + va_list ap; + va_start (ap, format); + ctx->error = strdup_vprintf (format, ap); + va_end (ap); + + if (!ctx->error) + ctx->memory_failure = true; + return false; +} + +static bool +push (struct context *ctx, struct item *item) +{ + // The `item' is typically a result from new_(), thus when it is null, + // that function must have failed. This is a shortcut for convenience. + if (!item) + { + ctx->memory_failure = true; + return false; + } + + assert (item->next == NULL); + item->next = ctx->stack; + ctx->stack = item; + ctx->stack_size++; + return true; +} + +static bool +bump_reductions (struct context *ctx) +{ + if (++ctx->reduction_count >= ctx->reduction_limit) + { + ctx->error_is_fatal = true; + return set_error (ctx, "reduction limit reached"); + } + return true; +} + +static bool execute (struct context *, struct item *); + +static bool +call_function (struct context *ctx, const char *name) +{ + struct fn *iter; + for (iter = g_functions; iter; iter = iter->next) + if (!strcmp (name, iter->name)) + goto found; + return set_error (ctx, "unknown function: %s", name); + +found: + if (!bump_reductions (ctx)) + return false; + + if (iter->handler + ? iter->handler (ctx) + : execute (ctx, iter->script)) + return true; + + // In this case, `error' is NULL + if (ctx->memory_failure) + return false; + + // This creates some form of a stack trace + char *tmp = ctx->error; + ctx->error = NULL; + set_error (ctx, "%s -> %s", name, tmp); + free (tmp); + return false; +} + +static void +free_function (struct fn *fn) +{ + item_free_list (fn->script); + free (fn); +} + +static void +unregister_function (const char *name) +{ + for (struct fn **iter = &g_functions; *iter; iter = &(*iter)->next) + if (!strcmp ((*iter)->name, name)) + { + struct fn *tmp = *iter; + *iter = tmp->next; + free_function (tmp); + break; + } +} + +static struct fn * +prepend_new_fn (const char *name) +{ + struct fn *fn = calloc (1, sizeof *fn + strlen (name) + 1); + if (!fn) + return NULL; + + strcpy (fn->name, name); + fn->next = g_functions; + return g_functions = fn; +} + +static bool +register_handler (const char *name, handler_fn handler) +{ + unregister_function (name); + struct fn *fn = prepend_new_fn (name); + if (!fn) + return false; + fn->handler = handler; + return true; +} + +static bool +register_script (const char *name, struct item *script) +{ + unregister_function (name); + struct fn *fn = prepend_new_fn (name); + if (!fn) + return false; + fn->script = script; + return true; +} + +static bool +execute (struct context *ctx, struct item *script) +{ + for (; script; script = script->next) + { + if (script->type != ITEM_WORD) + { + if (!bump_reductions (ctx) + || !push (ctx, new_clone (script))) + return false; + } + else if (!call_function (ctx, get_word (script))) + return false; + } + return true; +} + +// --- Runtime library --------------------------------------------------------- + +#define defn(name) static bool name (struct context *ctx) + +#define check_stack(n) \ + if (ctx->stack_size < n) { \ + set_error (ctx, "stack underflow"); \ + return 0; \ + } + +inline static bool +check_stack_safe (struct context *ctx, size_t n) +{ + check_stack (n); + return true; +} + +static bool +check_type (struct context *ctx, const void *item_, enum item_type type) +{ + const struct item *item = item_; + if (item->type == type) + return true; + + return set_error (ctx, "invalid type: expected `%s', got `%s'", + item_type_to_str (type), item_type_to_str (item->type)); +} + +static struct item * +pop (struct context *ctx) +{ + check_stack (1); + struct item *top = ctx->stack; + ctx->stack = top->next; + top->next = NULL; + ctx->stack_size--; + return top; +} + +// - - Types - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +#define defn_is_type(name, item_type) \ + defn (fn_is_##name) { \ + check_stack (1); \ + struct item *top = pop (ctx); \ + push (ctx, new_integer (top->type == (item_type))); \ + item_free (top); \ + return true; \ + } + +defn_is_type (string, ITEM_STRING) +defn_is_type (word, ITEM_WORD) +defn_is_type (integer, ITEM_INTEGER) +defn_is_type (float, ITEM_FLOAT) +defn_is_type (list, ITEM_LIST) + +defn (fn_to_string) +{ + check_stack (1); + struct item *item = pop (ctx); + char *value; + + switch (item->type) + { + case ITEM_WORD: + item->type = ITEM_STRING; + case ITEM_STRING: + return push (ctx, item); + + case ITEM_FLOAT: + value = strdup_printf ("%Lf", get_float (item)); + break; + case ITEM_INTEGER: + value = strdup_printf ("%lld", get_integer (item)); + break; + + default: + set_error (ctx, "cannot convert `%s' to `%s'", + item_type_to_str (item->type), item_type_to_str (ITEM_STRING)); + item_free (item); + return false; + } + + item_free (item); + if (!value) + { + ctx->memory_failure = true; + return false; + } + + item = new_string (value, -1); + free (value); + return push (ctx, item); +} + +defn (fn_to_integer) +{ + check_stack (1); + struct item *item = pop (ctx); + long long value; + + switch (item->type) + { + case ITEM_INTEGER: + return push (ctx, item); + case ITEM_FLOAT: + value = get_float (item); + break; + + case ITEM_STRING: + { + char *end; + const char *s = get_string (item); + value = strtoll (s, &end, 10); + if (end != s && *s == '\0') + break; + + item_free (item); + return set_error (ctx, "integer conversion error"); + } + + default: + set_error (ctx, "cannot convert `%s' to `%s'", + item_type_to_str (item->type), item_type_to_str (ITEM_INTEGER)); + item_free (item); + return false; + } + + item_free (item); + return push (ctx, new_integer (value)); +} + +defn (fn_to_float) +{ + check_stack (1); + struct item *item = pop (ctx); + long double value; + + switch (item->type) + { + case ITEM_FLOAT: + return push (ctx, item); + case ITEM_INTEGER: + value = get_integer (item); + break; + + case ITEM_STRING: + { + char *end; + const char *s = get_string (item); + value = strtold (s, &end); + if (end != s && *s == '\0') + break; + + item_free (item); + return set_error (ctx, "float conversion error"); + } + + default: + set_error (ctx, "cannot convert `%s' to `%s'", + item_type_to_str (item->type), item_type_to_str (ITEM_FLOAT)); + item_free (item); + return false; + } + + item_free (item); + return push (ctx, new_float (value)); +} + +// - - Miscellaneous - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +defn (fn_length) +{ + check_stack (1); + struct item *item = pop (ctx); + bool success = true; + switch (item->type) + { + case ITEM_STRING: + success = push (ctx, new_integer (((struct item_string *) item)->len)); + break; + case ITEM_LIST: + { + long long length = 0; + struct item *iter; + for (iter = get_list (item); iter; iter = iter->next) + length++; + success = push (ctx, new_integer (length)); + break; + } + default: + success = set_error (ctx, "invalid type"); + } + item_free (item); + return success; +} + +// - - Stack operations - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +defn (fn_dup) +{ + check_stack (1); + return push (ctx, new_clone (ctx->stack)); +} + +defn (fn_drop) +{ + check_stack (1); + item_free (pop (ctx)); + return true; +} + +defn (fn_swap) +{ + check_stack (2); + struct item *second = pop (ctx), *first = pop (ctx); + return push (ctx, second) && push (ctx, first); +} + +defn (fn_call) +{ + check_stack (1); + struct item *script = pop (ctx); + bool success = check_type (ctx, script, ITEM_LIST) + && execute (ctx, get_list (script)); + item_free (script); + return success; +} + +defn (fn_dip) +{ + check_stack (2); + struct item *script = pop (ctx); + struct item *item = pop (ctx); + bool success = check_type (ctx, script, ITEM_LIST) + && execute (ctx, get_list (script)); + item_free (script); + if (!success) + { + item_free (item); + return false; + } + return push (ctx, item); +} + +defn (fn_unit) +{ + check_stack (1); + struct item *item = pop (ctx); + return push (ctx, new_list (item)); +} + +defn (fn_cons) +{ + check_stack (2); + struct item *list = pop (ctx); + struct item *item = pop (ctx); + if (!check_type (ctx, list, ITEM_LIST)) + { + item_free (list); + item_free (item); + return false; + } + item->next = get_list (list); + ((struct item_list *) list)->head = item; + return push (ctx, list); +} + +defn (fn_cat) +{ + check_stack (2); + struct item *scnd = pop (ctx); + struct item *frst = pop (ctx); + if (!check_type (ctx, frst, ITEM_LIST) + || !check_type (ctx, scnd, ITEM_LIST)) + { + item_free (frst); + item_free (scnd); + return false; + } + + // XXX: we shouldn't have to do this in O(n) + struct item **tail = &((struct item_list *) frst)->head; + while (*tail) + tail = &(*tail)->next; + *tail = get_list (scnd); + + ((struct item_list *) scnd)->head = NULL; + item_free (scnd); + return push (ctx, frst); +} + +defn (fn_uncons) +{ + check_stack (1); + struct item *list = pop (ctx); + if (!check_type (ctx, list, ITEM_LIST)) + goto fail; + struct item *first = get_list (list); + if (!first) + { + set_error (ctx, "list is empty"); + goto fail; + } + ((struct item_list *) list)->head = first->next; + first->next = NULL; + return push (ctx, first) && push (ctx, list); +fail: + item_free (list); + return false; +} + +// - - Logical - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +static bool +to_boolean (struct context *ctx, struct item *item, bool *ok) +{ + switch (item->type) + { + case ITEM_STRING: + return *get_string (item) != '\0'; + case ITEM_INTEGER: + return get_integer (item) != 0; + case ITEM_FLOAT: + return get_float (item) != 0.; + default: + return (*ok = set_error (ctx, "cannot convert `%s' to boolean", + item_type_to_str (item->type))); + } +} + +defn (fn_not) +{ + check_stack (1); + struct item *item = pop (ctx); + bool ok = true; + bool result = !to_boolean (ctx, item, &ok); + item_free (item); + return ok && push (ctx, new_integer (result)); +} + +defn (fn_and) +{ + check_stack (2); + struct item *op1 = pop (ctx); + struct item *op2 = pop (ctx); + bool ok = true; + bool result = to_boolean (ctx, op1, &ok) && to_boolean (ctx, op2, &ok); + item_free (op1); + item_free (op2); + return ok && push (ctx, new_integer (result)); +} + +defn (fn_or) +{ + check_stack (2); + struct item *op1 = pop (ctx); + struct item *op2 = pop (ctx); + bool ok = true; + bool result = to_boolean (ctx, op1, &ok) + || !ok || to_boolean (ctx, op2, &ok); + item_free (op1); + item_free (op2); + return ok && push (ctx, new_integer (result)); +} + +// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +defn (fn_if) +{ + check_stack (3); + struct item *else_ = pop (ctx); + struct item *then_ = pop (ctx); + struct item *cond_ = pop (ctx); + + bool ok = true; + bool condition = to_boolean (ctx, cond_, &ok); + item_free (cond_); + + bool success = false; + if (ok + && check_type (ctx, then_, ITEM_LIST) + && check_type (ctx, else_, ITEM_LIST)) + success = execute (ctx, condition + ? get_list (then_) + : get_list (else_)); + + item_free (then_); + item_free (else_); + return success; +} + +defn (fn_try) +{ + check_stack (2); + struct item *catch = pop (ctx); + struct item *try = pop (ctx); + bool success = false; + if (!check_type (ctx, try, ITEM_LIST) + || !check_type (ctx, catch, ITEM_LIST)) + goto fail; + + if (!execute (ctx, get_list (try))) + { + if (ctx->memory_failure || ctx->error_is_fatal) + goto fail; + + success = push (ctx, new_string (ctx->error, -1)); + free (ctx->error); + ctx->error = NULL; + + if (success) + success = execute (ctx, get_list (catch)); + } + +fail: + item_free (try); + item_free (catch); + return success; +} + +defn (fn_map) +{ + check_stack (2); + struct item *fn = pop (ctx); + struct item *list = pop (ctx); + if (!check_type (ctx, fn, ITEM_LIST) + || !check_type (ctx, list, ITEM_LIST)) + { + item_free (fn); + item_free (list); + return false; + } + + bool success = false; + struct item *result = NULL, **tail = &result; + for (struct item *iter = get_list (list); iter; iter = iter->next) + { + if (!push (ctx, new_clone (iter)) + || !execute (ctx, get_list (fn)) + || !check_stack_safe (ctx, 1)) + goto fail; + + struct item *item = pop (ctx); + *tail = item; + tail = &item->next; + } + success = true; + +fail: + set_list (list, result); + item_free (fn); + if (!success) + { + item_free (list); + return false; + } + return push (ctx, list); +} + +defn (fn_filter) +{ + check_stack (2); + struct item *fn = pop (ctx); + struct item *list = pop (ctx); + if (!check_type (ctx, fn, ITEM_LIST) + || !check_type (ctx, list, ITEM_LIST)) + { + item_free (fn); + item_free (list); + return false; + } + + bool success = false; + bool ok = true; + struct item *result = NULL, **tail = &result; + for (struct item *iter = get_list (list); iter; iter = iter->next) + { + if (!push (ctx, new_clone (iter)) + || !execute (ctx, get_list (fn)) + || !check_stack_safe (ctx, 1)) + goto fail; + + struct item *item = pop (ctx); + bool survived = to_boolean (ctx, item, &ok); + item_free (item); + if (!ok) + goto fail; + if (!survived) + continue; + + if (!(item = new_clone (iter))) + goto fail; + *tail = item; + tail = &item->next; + } + success = true; + +fail: + set_list (list, result); + item_free (fn); + if (!success) + { + item_free (list); + return false; + } + return push (ctx, list); +} + +defn (fn_fold) +{ + check_stack (3); + struct item *op = pop (ctx); + struct item *null = pop (ctx); + struct item *list = pop (ctx); + bool success = false; + if (!check_type (ctx, op, ITEM_LIST) + || !check_type (ctx, list, ITEM_LIST)) + { + item_free (null); + goto fail; + } + + push (ctx, null); + for (struct item *iter = get_list (list); iter; iter = iter->next) + if (!push (ctx, new_clone (iter)) + || !execute (ctx, get_list (op))) + goto fail; + success = true; + +fail: + item_free (op); + item_free (list); + return success; +} + +defn (fn_each) +{ + check_stack (2); + struct item *op = pop (ctx); + struct item *list = pop (ctx); + bool success = false; + if (!check_type (ctx, op, ITEM_LIST) + || !check_type (ctx, list, ITEM_LIST)) + goto fail; + + for (struct item *iter = get_list (list); iter; iter = iter->next) + if (!push (ctx, new_clone (iter)) + || !execute (ctx, get_list (op))) + goto fail; + success = true; + +fail: + item_free (op); + item_free (list); + return success; +} + +// - - Arithmetic - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +// XXX: why not a `struct item_string *` argument? +static bool +push_repeated_string (struct context *ctx, struct item *op1, struct item *op2) +{ + struct item_string *string = (struct item_string *) op1; + struct item_integer *repeat = (struct item_integer *) op2; + assert (string->type == ITEM_STRING); + assert (repeat->type == ITEM_INTEGER); + + if (repeat->value < 0) + return set_error (ctx, "cannot multiply a string by a negative value"); + + char *buf = NULL; + size_t len = string->len * repeat->value; + if (len < string->len && repeat->value != 0) + goto allocation_fail; + + buf = malloc (len); + if (!buf) + goto allocation_fail; + + for (size_t i = 0; i < len; i += string->len) + memcpy (buf + i, string->value, string->len); + struct item *item = new_string (buf, len); + free (buf); + return push (ctx, item); + +allocation_fail: + ctx->memory_failure = true; + return false; +} + +defn (fn_times) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_integer (op1) * get_integer (op2))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_integer (op1) * get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_float (op1) * get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_float (get_float (op1) * get_integer (op2))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_STRING) + ok = push_repeated_string (ctx, op2, op1); + else if (op1->type == ITEM_STRING && op2->type == ITEM_INTEGER) + ok = push_repeated_string (ctx, op1, op2); + else + ok = set_error (ctx, "cannot multiply `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +defn (fn_pow) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + // TODO: implement this properly, outputting an integer + ok = push (ctx, new_float (powl (get_integer (op1), get_integer (op2)))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (powl (get_integer (op1), get_float (op2)))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (powl (get_float (op1), get_float (op2)))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_float (powl (get_float (op1), get_integer (op2)))); + else + ok = set_error (ctx, "cannot exponentiate `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +defn (fn_div) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + { + if (get_integer (op2) == 0) + ok = set_error (ctx, "division by zero"); + else + ok = push (ctx, new_integer (get_integer (op1) / get_integer (op2))); + } + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_integer (op1) / get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_float (op1) / get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_float (get_float (op1) / get_integer (op2))); + else + ok = set_error (ctx, "cannot divide `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +defn (fn_mod) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + { + if (get_integer (op2) == 0) + ok = set_error (ctx, "division by zero"); + else + ok = push (ctx, new_integer (get_integer (op1) % get_integer (op2))); + } + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (fmodl (get_integer (op1), get_float (op2)))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (fmodl (get_float (op1), get_float (op2)))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_float (fmodl (get_float (op1), get_integer (op2)))); + else + ok = set_error (ctx, "cannot divide `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +static bool +push_concatenated_string (struct context *ctx, + struct item *op1, struct item *op2) +{ + struct item_string *s1 = (struct item_string *) op1; + struct item_string *s2 = (struct item_string *) op2; + assert (s1->type == ITEM_STRING); + assert (s2->type == ITEM_STRING); + + char *buf = NULL; + size_t len = s1->len + s2->len; + if (len < s1->len || len < s2->len) + goto allocation_fail; + + buf = malloc (len); + if (!buf) + goto allocation_fail; + + memcpy (buf, s1->value, s1->len); + memcpy (buf + s1->len, s2->value, s2->len); + struct item *item = new_string (buf, len); + free (buf); + return push (ctx, item); + +allocation_fail: + ctx->memory_failure = true; + return false; + +} + +defn (fn_plus) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_integer (op1) + get_integer (op2))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_integer (op1) + get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_float (op1) + get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_float (get_float (op1) + get_integer (op2))); + else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING) + ok = push_concatenated_string (ctx, op1, op2); + else + ok = set_error (ctx, "cannot add `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +defn (fn_minus) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_integer (op1) - get_integer (op2))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_integer (op1) - get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_float (get_float (op1) - get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_float (get_float (op1) - get_integer (op2))); + else + ok = set_error (ctx, "cannot subtract `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +// - - Comparison - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +static int +compare_strings (struct item_string *s1, struct item_string *s2) +{ + // XXX: not entirely correct wrt. null bytes + size_t len = (s1->len < s2->len ? s1->len : s2->len) + 1; + return memcmp (s1->value, s2->value, len); +} + +static bool compare_lists (struct item *, struct item *); + +static bool +compare_list_items (struct item *op1, struct item *op2) +{ + if (op1->type != op2->type) + return false; + + switch (op1->type) + { + case ITEM_STRING: + case ITEM_WORD: + return !compare_strings ((struct item_string *) op1, + (struct item_string *) op2); + case ITEM_FLOAT: + return get_float (op1) == get_float (op2); + case ITEM_INTEGER: + return get_integer (op1) == get_integer (op2); + case ITEM_LIST: + return compare_lists (get_list (op1), get_list (op2)); + } + abort (); +} + +static bool +compare_lists (struct item *op1, struct item *op2) +{ + while (op1 && op2) + { + if (!compare_list_items (op1, op2)) + return false; + + op1 = op1->next; + op2 = op2->next; + } + return !op1 && !op2; +} + +defn (fn_eq) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_integer (op1) == get_integer (op2))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_integer (get_integer (op1) == get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_integer (get_float (op1) == get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_float (op1) == get_integer (op2))); + else if (op1->type == ITEM_LIST && op2->type == ITEM_LIST) + ok = push (ctx, new_integer (compare_lists + (get_list (op1), get_list (op2)))); + else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING) + ok = push (ctx, new_integer (compare_strings + ((struct item_string *)(op1), (struct item_string *)(op2)) == 0)); + else + ok = set_error (ctx, "cannot compare `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +defn (fn_lt) +{ + check_stack (2); + struct item *op2 = pop (ctx); + struct item *op1 = pop (ctx); + + bool ok; + if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_integer (op1) < get_integer (op2))); + else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT) + ok = push (ctx, new_integer (get_integer (op1) < get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT) + ok = push (ctx, new_integer (get_float (op1) < get_float (op2))); + else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER) + ok = push (ctx, new_integer (get_float (op1) < get_integer (op2))); + else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING) + ok = push (ctx, new_integer (compare_strings + ((struct item_string *)(op1), (struct item_string *)(op2)) < 0)); + else + ok = set_error (ctx, "cannot compare `%s' and `%s'", + item_type_to_str (op1->type), item_type_to_str (op2->type)); + + item_free (op1); + item_free (op2); + return ok; +} + +// - - Utilities - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +defn (fn_rand) +{ + return push (ctx, new_float ((long double) rand () + / ((long double) RAND_MAX + 1))); +} + +defn (fn_time) +{ + return push (ctx, new_integer (time (NULL))); +} + +// XXX: this is a bit too constrained; combines strftime() with gmtime() +defn (fn_strftime) +{ + check_stack (2); + struct item *format = pop (ctx); + struct item *time_ = pop (ctx); + bool success = false; + if (!check_type (ctx, time_, ITEM_INTEGER) + || !check_type (ctx, format, ITEM_STRING)) + goto fail; + + if (get_integer (time_) < 0) + { + set_error (ctx, "invalid time value"); + goto fail; + } + + char buf[128]; + time_t time__ = get_integer (time_); + struct tm tm; + gmtime_r (&time__, &tm); + buf[strftime (buf, sizeof buf, get_string (format), &tm)] = '\0'; + success = push (ctx, new_string (buf, -1)); + +fail: + item_free (time_); + item_free (format); + return success; +} + +// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +static void item_list_to_str (const struct item *, struct buffer *); + +static void +string_to_str (const struct item_string *string, struct buffer *buf) +{ + buffer_append_c (buf, '"'); + for (size_t i = 0; i < string->len; i++) + { + char c = string->value[i]; + if (c == '\n') buffer_append (buf, "\\n", 2); + else if (c == '\r') buffer_append (buf, "\\r", 2); + else if (c == '\t') buffer_append (buf, "\\t", 2); + else if (!isprint (c)) + { + char tmp[8]; + snprintf (tmp, sizeof tmp, "\\x%02x", (unsigned char) c); + buffer_append (buf, tmp, strlen (tmp)); + } + else if (c == '\\') buffer_append (buf, "\\\\", 2); + else if (c == '"') buffer_append (buf, "\\\"", 2); + else buffer_append_c (buf, c); + } + buffer_append_c (buf, '"'); +} + +static void +item_to_str (const struct item *item, struct buffer *buf) +{ + switch (item->type) + { + char *x; + case ITEM_STRING: + string_to_str ((struct item_string *) item, buf); + break; + case ITEM_WORD: + { + struct item_word *word = (struct item_word *) item; + buffer_append (buf, word->value, word->len); + break; + } + case ITEM_INTEGER: + if (!(x = strdup_printf ("%lld", get_integer (item)))) + goto alloc_failure; + buffer_append (buf, x, strlen (x)); + free (x); + break; + case ITEM_FLOAT: + if (!(x = strdup_printf ("%Lf", get_float (item)))) + goto alloc_failure; + buffer_append (buf, x, strlen (x)); + free (x); + break; + case ITEM_LIST: + buffer_append_c (buf, '['); + item_list_to_str (get_list (item), buf); + buffer_append_c (buf, ']'); + break; + } + return; + +alloc_failure: + // This is a bit hackish but it simplifies stuff + buf->memory_failure = true; + free (buf->s); + buf->s = NULL; +} + +static void +item_list_to_str (const struct item *script, struct buffer *buf) +{ + if (!script) + return; + + item_to_str (script, buf); + while ((script = script->next)) + { + buffer_append_c (buf, ' '); + item_to_str (script, buf); + } +} + +// --- IRC protocol ------------------------------------------------------------ + +struct message +{ + char *prefix; ///< Message prefix + char *command; ///< IRC command + char *params[16]; ///< Command parameters (0-terminated) + size_t n_params; ///< Number of parameters present +}; + +inline static char * +cut_word (char **s) +{ + char *start = *s, *end = *s + strcspn (*s, " "); + *s = end + strspn (end, " "); + *end = '\0'; + return start; +} + +static bool +parse_message (char *s, struct message *msg) +{ + memset (msg, 0, sizeof *msg); + + // Ignore IRC 3.2 message tags, if present + if (*s == '@') + { + s += strcspn (s, " "); + s += strspn (s, " "); + } + + // Prefix + if (*s == ':') + msg->prefix = cut_word (&s) + 1; + + // Command + if (!*(msg->command = cut_word (&s))) + return false; + + // Parameters + while (*s) + { + size_t n = msg->n_params++; + if (msg->n_params >= N_ELEMENTS (msg->params)) + return false; + if (*s == ':') + { + msg->params[n] = ++s; + break; + } + msg->params[n] = cut_word (&s); + } + return true; +} + +static struct message * +read_message (void) +{ + static bool discard = false; + static char buf[1025]; + static struct message msg; + + bool discard_this; + do + { + if (!fgets (buf, sizeof buf, stdin)) + return NULL; + size_t len = strlen (buf); + + // Just to be on the safe side, if the line overflows our buffer, + // ignore everything up until the next line. + discard_this = discard; + if (len >= 2 && !strcmp (buf + len - 2, "\r\n")) + { + buf[len -= 2] = '\0'; + discard = false; + } + else + discard = true; + } + // Invalid messages are silently ignored + while (discard_this || !parse_message (buf, &msg)); + return &msg; +} + +// --- Interfacing with the bot ------------------------------------------------ + +#define BOT_PRINT "ZYKLONB print :script: " + +static const char * +get_config (const char *key) +{ + printf ("ZYKLONB get_config :%s\r\n", key); + struct message *msg = read_message (); + if (!msg || msg->n_params <= 0) + exit (EXIT_FAILURE); + return msg->params[0]; +} + +// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - + +// TODO: implement more functions; try to avoid writing them in C + +static bool +init_runtime_library_scripts (void) +{ + bool ok = true; + + // It's much cheaper (and more fun) to define functions in terms of other + // ones. The "unit tests" serve a secondary purpose of showing the usage. + struct script + { + const char *name; ///< Name of the function + const char *definition; ///< The defining script + const char *unit_test; ///< Trivial unit test, must return 1 + } + scripts[] = + { + { "nip", "swap drop", "1 2 nip 2 =" }, + { "over", "[dup] dip swap", "1 2 over nip nip 1 =" }, + { "swons", "swap cons", "[2] 1 swons [1 2] =" }, + { "first", "uncons drop", "[1 2 3] first 1 =" }, + { "rest", "uncons swap drop", "[1 2 3] rest [2 3] =" }, + { "reverse", "[] swap [swap cons] each", "[1 2] reverse [2 1] =" }, + { "curry", "cons", "1 2 [+] curry call 3 =" }, + + { "xor", "not swap not + 1 =", "1 1 xor 0 =" }, + { "min", "over over < [drop] [nip] if", "1 2 min 1 =" }, + { "max", "over over > [drop] [nip] if", "1 2 max 2 =" }, + + { "all?", "[and] cat 1 swap fold", "[3 4 5] [> 3] all? 0 =" }, + { "any?", "[or] cat 0 swap fold", "[3 4 5] [> 3] any? 1 =" }, + + { ">", "swap <", "1 2 > 0 =" }, + { "!=", "= not", "1 2 != 1 =" }, + { "<=", "> not", "1 2 <= 1 =" }, + { ">=", "< not", "1 2 >= 0 =" }, + + // XXX: this is a bit crazy and does not work with an empty list + { "join", "[uncons] dip swap [[dup] dip swap [+ +] dip] each drop", + "[1 2 3] [>string] map \" -> \" join \"1 -> 2 -> 3\" =" }, + }; + + for (size_t i = 0; i < N_ELEMENTS (scripts); i++) + { + const char *error = NULL; + struct item *script = parse (scripts[i].definition, &error); + if (error) + { + printf (BOT_PRINT "error parsing internal script `%s': %s\r\n", + scripts[i].definition, error); + ok = false; + } + else + ok &= register_script (scripts[i].name, script); + } + + struct context ctx; + for (size_t i = 0; i < N_ELEMENTS (scripts); i++) + { + const char *error = NULL; + struct item *script = parse (scripts[i].unit_test, &error); + if (error) + { + printf (BOT_PRINT "error parsing unit test for `%s': %s\r\n", + scripts[i].name, error); + ok = false; + continue; + } + context_init (&ctx); + execute (&ctx, script); + item_free_list (script); + + const char *failure = NULL; + if (ctx.memory_failure) + failure = "memory allocation failure"; + else if (ctx.error) + failure = ctx.error; + else if (ctx.stack_size != 1) + failure = "too many results on the stack"; + else if (ctx.stack->type != ITEM_INTEGER) + failure = "result is not an integer"; + else if (get_integer (ctx.stack) != 1) + failure = "wrong test result"; + if (failure) + { + printf (BOT_PRINT "error executing unit test for `%s': %s\r\n", + scripts[i].name, failure); + ok = false; + } + context_free (&ctx); + } + return ok; +} + +static bool +init_runtime_library (void) +{ + bool ok = true; + + // Type detection + ok &= register_handler ("string?", fn_is_string); + ok &= register_handler ("word?", fn_is_word); + ok &= register_handler ("integer?", fn_is_integer); + ok &= register_handler ("float?", fn_is_float); + ok &= register_handler ("list?", fn_is_list); + + // Type conversion + ok &= register_handler (">string", fn_to_string); + ok &= register_handler (">integer", fn_to_integer); + ok &= register_handler (">float", fn_to_float); + + // Miscellaneous + ok &= register_handler ("length", fn_length); + + // Basic stack manipulation + ok &= register_handler ("dup", fn_dup); + ok &= register_handler ("drop", fn_drop); + ok &= register_handler ("swap", fn_swap); + + // Calling stuff + ok &= register_handler ("call", fn_call); + ok &= register_handler ("dip", fn_dip); + + // Control flow + ok &= register_handler ("if", fn_if); + ok &= register_handler ("try", fn_try); + + // List processing + ok &= register_handler ("map", fn_map); + ok &= register_handler ("filter", fn_filter); + ok &= register_handler ("fold", fn_fold); + ok &= register_handler ("each", fn_each); + + // List manipulation + ok &= register_handler ("unit", fn_unit); + ok &= register_handler ("cons", fn_cons); + ok &= register_handler ("cat", fn_cat); + ok &= register_handler ("uncons", fn_uncons); + + // Arithmetic operations + ok &= register_handler ("+", fn_plus); + ok &= register_handler ("-", fn_minus); + ok &= register_handler ("*", fn_times); + ok &= register_handler ("^", fn_pow); + ok &= register_handler ("/", fn_div); + ok &= register_handler ("%", fn_mod); + + // Comparison + ok &= register_handler ("=", fn_eq); + ok &= register_handler ("<", fn_lt); + + // Logical operations + ok &= register_handler ("not", fn_not); + ok &= register_handler ("and", fn_and); + ok &= register_handler ("or", fn_or); + + // Utilities + ok &= register_handler ("rand", fn_rand); + ok &= register_handler ("time", fn_time); + ok &= register_handler ("strftime", fn_strftime); + + ok &= init_runtime_library_scripts (); + return ok; +} + +static void +free_runtime_library (void) +{ + struct fn *next, *iter; + for (iter = g_functions; iter; iter = next) + { + next = iter->next; + free_function (iter); + } +} + +// --- Function database ------------------------------------------------------- + +// TODO: a global variable storing the various procedures (db) +// XXX: defining procedures would ideally need some kind of an ACL + +static void +read_db (void) +{ + // TODO +} + +static void +write_db (void) +{ + // TODO +} + +// --- Main -------------------------------------------------------------------- + +static char *g_prefix; + +struct user_info +{ + char *ctx; ///< Context: channel or user + char *ctx_quote; ///< Reply quotation +}; + +defn (fn_dot) +{ + check_stack (1); + struct item *item = pop (ctx); + struct user_info *info = ctx->user_data; + + struct buffer buf = BUFFER_INITIALIZER; + item_to_str (item, &buf); + item_free (item); + buffer_append_c (&buf, '\0'); + if (buf.memory_failure) + { + ctx->memory_failure = true; + return false; + } + + if (buf.len > 255) + buf.s[255] = '\0'; + + printf ("PRIVMSG %s :%s%s\r\n", info->ctx, info->ctx_quote, buf.s); + free (buf.s); + return true; +} + +static void +process_message (struct message *msg) +{ + if (!msg->prefix + || strcasecmp (msg->command, "PRIVMSG") + || msg->n_params < 2) + return; + char *line = msg->params[1]; + + // Filter out only our commands + size_t prefix_len = strlen (g_prefix); + if (strncmp (line, g_prefix, prefix_len)) + return; + line += prefix_len; + + char *command = cut_word (&line); + if (strcasecmp (command, "script")) + return; + + // Retrieve information on how to respond back + char *msg_ctx = msg->prefix, *x; + if ((x = strchr (msg_ctx, '!'))) + *x = '\0'; + + char *msg_ctx_quote; + if (strchr ("#+&!", *msg->params[0])) + { + msg_ctx_quote = strdup_printf ("%s: ", msg_ctx); + msg_ctx = msg->params[0]; + } + else + msg_ctx_quote = strdup (""); + + if (!msg_ctx_quote) + { + printf (BOT_PRINT "%s\r\n", "memory allocation failure"); + return; + } + + struct user_info info; + info.ctx = msg_ctx; + info.ctx_quote = msg_ctx_quote; + + // Finally parse and execute the macro + const char *error = NULL; + struct item *script = parse (line, &error); + if (error) + { + printf ("PRIVMSG %s :%s%s: %s\r\n", + msg_ctx, msg_ctx_quote, "parse error", error); + goto end; + } + + struct context ctx; + context_init (&ctx); + ctx.user_data = &info; + execute (&ctx, script); + item_free_list (script); + + const char *failure = NULL; + if (ctx.memory_failure) + failure = "memory allocation failure"; + else if (ctx.error) + failure = ctx.error; + if (failure) + printf ("PRIVMSG %s :%s%s: %s\r\n", + msg_ctx, msg_ctx_quote, "runtime error", failure); + context_free (&ctx); +end: + free (msg_ctx_quote); +} + +int +main (int argc, char *argv[]) +{ + freopen (NULL, "rb", stdin); setvbuf (stdin, NULL, _IOLBF, BUFSIZ); + freopen (NULL, "wb", stdout); setvbuf (stdout, NULL, _IOLBF, BUFSIZ); + + struct rlimit limit = + { + .rlim_cur = ADDRESS_SPACE_LIMIT, + .rlim_max = ADDRESS_SPACE_LIMIT + }; + + // Lower the memory limits to something sensible to prevent abuse + (void) setrlimit (RLIMIT_AS, &limit); + + read_db (); + if (!init_runtime_library () + || !register_handler (".", fn_dot)) + printf (BOT_PRINT "%s\r\n", "runtime library initialization failed"); + + g_prefix = strdup (get_config ("prefix")); + printf ("ZYKLONB register\r\n"); + struct message *msg; + while ((msg = read_message ())) + process_message (msg); + + free_runtime_library (); + free (g_prefix); + return 0; +} + diff --git a/plugins/zyklonb/youtube b/plugins/zyklonb/youtube new file mode 100755 index 0000000..5614860 --- /dev/null +++ b/plugins/zyklonb/youtube @@ -0,0 +1,111 @@ +#!/usr/bin/env python3 +# +# ZyklonB YouTube plugin, displaying info about YouTube links +# +# Copyright 2014 - 2015, Přemysl Janouch +# See the file LICENSE for licensing information. +# + +import sys +import io +import re +import json +import urllib.request + +class Plugin: + re_msg = re.compile ('(?::([^! ]*)(?:!([^@]*)@([^ ]*))? +)?' + '([^ ]+)(?: +(.*))?\r\n$') + re_args = re.compile (':?((?<=:).*|[^ ]+) *') + + def parse (self, line): + m = self.re_msg.match (line) + if m is None: + return None + + (nick, user, host, command, args) = m.groups () + args = [] if args is None else self.re_args.findall (args) + return (nick, user, host, command, args) + + def get_config (self, key): + print ("ZYKLONB get_config :%s" % key) + (_, _, _, _, args) = self.parse (sys.stdin.readline ()) + return args[0] + + def bot_print (self, what): + print ('ZYKLONB print :%s' % what) + +class YouTube (Plugin): + re_videos = [re.compile (x) for x in [ + r'youtube\.[a-z]+/[^ ]*[&?]v=([-\w]+)', + r'youtube\.[a-z]+/v/([-\w]+)', + r'youtu\.be/([-\w]+)' + ]] + re_playlists = [re.compile (x) for x in [ + r'youtube\.[a-z]+/playlist[&?][^ ]*(?<=&|\?)list=([-\w]+)', + ]] + + def print_info (self, channel, url, cb): + try: + data = json.loads (urllib.request.urlopen + (url, None, 30).read ().decode ('utf-8')) + + for line in map (lambda x: "YouTube: " + cb (x), data['items']): + print ("PRIVMSG %s :%s" % (channel, + line.encode ('utf-8').decode ('iso8859-1'))) + + except Exception as err: + self.bot_print ('youtube: %s' % (err)) + + def print_video_info (self, channel, video_id): + url = 'https://www.googleapis.com/youtube/v3/' \ + + 'videos?id=%s&key=%s&part=snippet,contentDetails,statistics' \ + % (video_id, self.youtube_api_key) + self.print_info (channel, url, lambda x: "%s | %s | %sx" % ( + x['snippet']['title'], + x['contentDetails']['duration'][2:].lower (), + x['statistics']['viewCount'])) + + def print_playlist_info (self, channel, playlist_id): + url = 'https://www.googleapis.com/youtube/v3/' \ + + 'playlists?id=%s&key=%s&part=snippet,contentDetails' \ + % (playlist_id, self.youtube_api_key) + self.print_info (channel, url, lambda x: "%s | %d videos" % ( + x['snippet']['title'], + x['contentDetails']['itemCount'])) + + def process_line (self, line): + msg = self.parse (line) + if msg is None: + return + + (nick, user, host, command, args) = msg + if command != 'PRIVMSG' or len (args) < 2: + return + + ctx = args[0] + if not ctx.startswith (('#', '+', '&', '!')): + ctx = nick + + for regex in self.re_videos: + for i in regex.findall (args[1]): + self.print_video_info (ctx, i) + for regex in self.re_playlists: + for i in regex.findall (args[1]): + self.print_playlist_info (ctx, i) + + def run (self): + self.youtube_api_key = self.get_config ('youtube_api_key') + if self.youtube_api_key == "": + self.bot_print ("youtube: missing `youtube_api_key'") + + print ("ZYKLONB register") + + for line in sys.stdin: + self.process_line (line) + +sys.stdin = io.TextIOWrapper (sys.__stdin__.buffer, + encoding = 'iso8859-1', newline = '\r\n', line_buffering = True) +sys.stdout = io.TextIOWrapper (sys.__stdout__.buffer, + encoding = 'iso8859-1', newline = '\r\n', line_buffering = True) + +YouTube ().run () diff --git a/zyklonb.c b/zyklonb.c index 13a68e3..053130a 100644 --- a/zyklonb.c +++ b/zyklonb.c @@ -19,6 +19,7 @@ #include "config.h" #define PROGRAM_NAME "ZyklonB" +#define PLUGIN_DIR ZYKLONB_PLUGIN_DIR #include "common.c" -- cgit v1.2.3-70-g09d2