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-rwxr-xr-xplugins/script403
1 files changed, 285 insertions, 118 deletions
diff --git a/plugins/script b/plugins/script
index 55b35b3..c81aaa6 100755
--- a/plugins/script
+++ b/plugins/script
@@ -1,4 +1,4 @@
-#!/usr/bin/tcc -run
+#!/usr/bin/tcc -run -lm
//
// ZyklonB scripting plugin, using a custom stack-based language
//
@@ -30,6 +30,7 @@
#include <time.h>
#include <stdbool.h>
#include <strings.h>
+#include <math.h>
#if defined __GNUC__
#define ATTRIBUTE_PRINTF(x, y) __attribute__ ((format (printf, x, y)))
@@ -1003,14 +1004,16 @@ defn (fn_cons)
check_stack (2);
struct item *list = pop (ctx);
struct item *item = pop (ctx);
- bool success = check_type (ctx, list, ITEM_LIST);
+ 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;
- if (success)
- push (ctx, list);
- else
- item_free (list);
- return success;
+ push (ctx, list);
+ return true;
}
defn (fn_cat)
@@ -1358,8 +1361,8 @@ allocation_fail:
defn (fn_times)
{
check_stack (2);
- struct item *op1 = pop (ctx);
struct item *op2 = pop (ctx);
+ struct item *op1 = pop (ctx);
bool success = true;
if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER)
@@ -1386,6 +1389,104 @@ defn (fn_times)
return success;
}
+defn (fn_pow)
+{
+ check_stack (2);
+ struct item *op2 = pop (ctx);
+ struct item *op1 = pop (ctx);
+ bool success = true;
+
+ if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER)
+ // TODO: implement this properly, outputting an integer
+ push (ctx, new_float (powl (get_integer (op1), get_integer (op2))));
+ else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (powl (get_integer (op1), get_float (op2))));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (powl (get_float (op1), get_float (op2))));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER)
+ push (ctx, new_float (powl (get_float (op1), get_integer (op2))));
+ else
+ {
+ ctx->error = strdup_printf ("cannot exponentiate `%s' and `%s'",
+ item_type_to_str (op1->type), item_type_to_str (op2->type));
+ success = false;
+ }
+
+ item_free (op1);
+ item_free (op2);
+ return success;
+}
+
+defn (fn_div)
+{
+ check_stack (2);
+ struct item *op2 = pop (ctx);
+ struct item *op1 = pop (ctx);
+ bool success = true;
+
+ if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER)
+ {
+ if (get_integer (op2) == 0)
+ {
+ ctx->error = strdup ("division by zero");
+ success = false;
+ }
+ else
+ push (ctx, new_integer (get_integer (op1) / get_integer (op2)));
+ }
+ else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (get_integer (op1) / get_float (op2)));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (get_float (op1) / get_float (op2)));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER)
+ push (ctx, new_float (get_float (op1) / get_integer (op2)));
+ else
+ {
+ ctx->error = strdup_printf ("cannot divide `%s' and `%s'",
+ item_type_to_str (op1->type), item_type_to_str (op2->type));
+ success = false;
+ }
+
+ item_free (op1);
+ item_free (op2);
+ return success;
+}
+
+defn (fn_mod)
+{
+ check_stack (2);
+ struct item *op2 = pop (ctx);
+ struct item *op1 = pop (ctx);
+ bool success = true;
+
+ if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER)
+ {
+ if (get_integer (op2) == 0)
+ {
+ ctx->error = strdup ("division by zero");
+ success = false;
+ }
+ else
+ push (ctx, new_integer (get_integer (op1) % get_integer (op2)));
+ }
+ else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (fmodl (get_integer (op1), get_float (op2))));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (fmodl (get_float (op1), get_float (op2))));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER)
+ push (ctx, new_float (fmodl (get_float (op1), get_integer (op2))));
+ else
+ {
+ ctx->error = strdup_printf ("cannot divide `%s' and `%s'",
+ item_type_to_str (op1->type), item_type_to_str (op2->type));
+ success = false;
+ }
+
+ item_free (op1);
+ item_free (op2);
+ return success;
+}
+
static bool
push_concatenated_string (struct context *ctx,
struct item *op1, struct item *op2)
@@ -1424,8 +1525,8 @@ allocation_fail:
defn (fn_plus)
{
check_stack (2);
- struct item *op1 = pop (ctx);
struct item *op2 = pop (ctx);
+ struct item *op1 = pop (ctx);
bool success = true;
if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER)
@@ -1437,7 +1538,7 @@ defn (fn_plus)
else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER)
push (ctx, new_float (get_float (op1) + get_integer (op2)));
else if (op1->type == ITEM_STRING && op2->type == ITEM_STRING)
- success = push_concatenated_string (ctx, op2, op1);
+ success = push_concatenated_string (ctx, op1, op2);
else
{
ctx->error = strdup_printf ("cannot add `%s' and `%s'",
@@ -1450,6 +1551,33 @@ defn (fn_plus)
return success;
}
+defn (fn_minus)
+{
+ check_stack (2);
+ struct item *op2 = pop (ctx);
+ struct item *op1 = pop (ctx);
+ bool success = true;
+
+ if (op1->type == ITEM_INTEGER && op2->type == ITEM_INTEGER)
+ push (ctx, new_integer (get_integer (op1) - get_integer (op2)));
+ else if (op1->type == ITEM_INTEGER && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (get_integer (op1) - get_float (op2)));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_FLOAT)
+ push (ctx, new_float (get_float (op1) - get_float (op2)));
+ else if (op1->type == ITEM_FLOAT && op2->type == ITEM_INTEGER)
+ push (ctx, new_float (get_float (op1) - get_integer (op2)));
+ else
+ {
+ ctx->error = strdup_printf ("cannot subtract `%s' and `%s'",
+ item_type_to_str (op1->type), item_type_to_str (op2->type));
+ success = false;
+ }
+
+ item_free (op1);
+ item_free (op2);
+ return success;
+}
+
// - - Comparison - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static int
@@ -1680,114 +1808,6 @@ item_list_to_str (const struct item *script, struct buffer *buf)
}
}
-// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-
-// TODO: implement more functions; try to avoid writing it in C
-// -, /, %, ** -- arithmetic
-// at { value index -- sub-value } -- get n-th subvalue of a string/list
-
-static void
-init_runtime_library_scripts (void)
-{
- struct script
- {
- const char *name;
- const char *definition;
- }
- scripts[] =
- {
- { "swons", "swap cons" },
- { "first", "uncons drop" },
- { "rest", "uncons swap drop" },
-
- { ">", "swap <" },
- { "!=", "= not" },
- { "<=", "> not" },
- { ">=", "< not" },
-
- // XXX: this is a bit crazy and does not work with an empty list
- { "join", "[uncons] dip swap [[dup] dip swap [+ +] dip] each drop" },
- };
-
- for (size_t i = 0; i < N_ELEMENTS (scripts); i++)
- {
- char *error = NULL;
- struct item *script = parse (scripts[i].definition, &error);
- if (error)
- {
- fprintf (stderr, "error parsing internal script `%s': %s\n",
- scripts[i].definition, error);
- free (error);
- exit (EXIT_FAILURE);
- }
- register_script (scripts[i].name, script);
- }
-}
-
-static void
-init_runtime_library (void)
-{
- init_runtime_library_scripts ();
-
- // Type detection
- register_handler ("string?", fn_is_string);
- register_handler ("word?", fn_is_word);
- register_handler ("integer?", fn_is_integer);
- register_handler ("float?", fn_is_float);
- register_handler ("list?", fn_is_list);
-
- // Type conversion
- register_handler (">string", fn_to_string);
- register_handler (">integer", fn_to_integer);
- register_handler (">float", fn_to_float);
-
- // Miscellaneous
- register_handler ("length", fn_length);
-
- // Basic stack manipulation
- register_handler ("dup", fn_dup);
- register_handler ("drop", fn_drop);
- register_handler ("swap", fn_swap);
-
- // Calling stuff
- register_handler ("call", fn_call);
- register_handler ("dip", fn_dip);
-
- // Control flow
- register_handler ("if", fn_if);
- register_handler ("try", fn_try);
-
- // List processing
- register_handler ("map", fn_map);
- register_handler ("filter", fn_filter);
- register_handler ("fold", fn_fold);
- register_handler ("each", fn_each);
-
- // List manipulation
- register_handler ("unit", fn_unit);
- register_handler ("cons", fn_cons);
- register_handler ("cat", fn_cat);
- register_handler ("uncons", fn_uncons);
-
- // Arithmetic operations
- register_handler ("*", fn_times);
- register_handler ("+", fn_plus);
-
- // Comparison
- register_handler ("=", fn_eq);
- register_handler ("<", fn_lt);
-
- // Logical operations
- register_handler ("not", fn_not);
- register_handler ("and", fn_and);
- register_handler ("or", fn_or);
-
- // Utilities
- register_handler ("rand", fn_rand);
- register_handler ("time", fn_time);
- register_handler ("strftime", fn_strftime);
-}
-
// --- IRC protocol ------------------------------------------------------------
struct message
@@ -1887,6 +1907,153 @@ get_config (const char *key)
return msg->params[0];
}
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+// TODO: implement more functions; try to avoid writing them in C
+
+static void
+init_runtime_library_scripts (void)
+{
+ // 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++)
+ {
+ 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);
+ free (error);
+ continue;
+ }
+ register_script (scripts[i].name, script);
+ }
+
+ struct context ctx;
+ for (size_t i = 0; i < N_ELEMENTS (scripts); i++)
+ {
+ 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);
+ free (error);
+ continue;
+ }
+ context_init (&ctx);
+ execute (&ctx, script);
+ item_free_list (script);
+ if (ctx.error || ctx.stack_size != 1
+ || ctx.stack->type != ITEM_INTEGER || get_integer (ctx.stack) != 1)
+ printf (BOT_PRINT "error executing unit test for `%s': %s\r\n",
+ scripts[i].name, ctx.error ? ctx.error : "wrong test result");
+ context_free (&ctx);
+ }
+}
+
+static void
+init_runtime_library (void)
+{
+ // Type detection
+ register_handler ("string?", fn_is_string);
+ register_handler ("word?", fn_is_word);
+ register_handler ("integer?", fn_is_integer);
+ register_handler ("float?", fn_is_float);
+ register_handler ("list?", fn_is_list);
+
+ // Type conversion
+ register_handler (">string", fn_to_string);
+ register_handler (">integer", fn_to_integer);
+ register_handler (">float", fn_to_float);
+
+ // Miscellaneous
+ register_handler ("length", fn_length);
+
+ // Basic stack manipulation
+ register_handler ("dup", fn_dup);
+ register_handler ("drop", fn_drop);
+ register_handler ("swap", fn_swap);
+
+ // Calling stuff
+ register_handler ("call", fn_call);
+ register_handler ("dip", fn_dip);
+
+ // Control flow
+ register_handler ("if", fn_if);
+ register_handler ("try", fn_try);
+
+ // List processing
+ register_handler ("map", fn_map);
+ register_handler ("filter", fn_filter);
+ register_handler ("fold", fn_fold);
+ register_handler ("each", fn_each);
+
+ // List manipulation
+ register_handler ("unit", fn_unit);
+ register_handler ("cons", fn_cons);
+ register_handler ("cat", fn_cat);
+ register_handler ("uncons", fn_uncons);
+
+ // Arithmetic operations
+ register_handler ("+", fn_plus);
+ register_handler ("-", fn_minus);
+ register_handler ("*", fn_times);
+ register_handler ("^", fn_pow);
+ register_handler ("/", fn_div);
+ register_handler ("%", fn_mod);
+
+ // Comparison
+ register_handler ("=", fn_eq);
+ register_handler ("<", fn_lt);
+
+ // Logical operations
+ register_handler ("not", fn_not);
+ register_handler ("and", fn_and);
+ register_handler ("or", fn_or);
+
+ // Utilities
+ register_handler ("rand", fn_rand);
+ register_handler ("time", fn_time);
+ register_handler ("strftime", fn_strftime);
+
+ init_runtime_library_scripts ();
+}
+
// --- Function database -------------------------------------------------------
// TODO: a global variable storing the various procedures (db)
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2024-12-14 09:03:14 +0000