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-rwxr-xr-xplugins/eval312
1 files changed, 0 insertions, 312 deletions
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;
- }
- }
-}
-
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