Fixed static allocation of builting functions.

Co-authored-by: bgiobbe-tcs <bgiobbe.tcs@gmail.com>

src/exec.c

@@ -14,33 +14,17 @@ extern AST* root;
 AST* exec_find(char* name);
 
 AST* exec_start(AST* ast) {
+    log_dbg("Started execution.");
     scope = stack_init();
 
     HTab* global = htab_init();
 
-    for (int i = 0; i < NBUILTIN_FNS; i++)
+    for (int i = 0; i < BUILTIN_FNS_LN; i++)
         htab_ins(
-            global, builtin_fns_names[i],
-            ast_init(AST_TYPE_BIF, ast_bif_data_init(builtin_fns[i]))
+            global, BUILTIN_FNS[i].name,
+            ast_init(AST_TYPE_BIF, ast_bif_data_init(BUILTIN_FNS[i].fn))
         );
 
-    /*
-    htab_ins(
-        global, "sum", ast_init(AST_TYPE_BIF, ast_bif_data_init(builtin_sum))
-    );
-
-    htab_ins(
-        global, "sub", ast_init(AST_TYPE_BIF, ast_bif_data_init(builtin_sub))
-    );
-
-    htab_ins(
-        global, "mul", ast_init(AST_TYPE_BIF, ast_bif_data_init(builtin_mul))
-    );
-
-    htab_ins(
-        global, "div", ast_init(AST_TYPE_BIF, ast_bif_data_init(builtin_div))
-        );*/
-
     // Push global namespace to `scope`.
     stack_push(scope, global);
 
@@ -48,7 +32,6 @@ AST* exec_start(AST* ast) {
 }
 
 AST* exec_exp(AST* ast) {
-    log_dbg("Started execution.");
     switch (ast->type) {
         case AST_TYPE_BLOCK: return exec_block(ast);
         case AST_TYPE_CALL:  return exec_call(ast);

src/include/builtin.h

@@ -15,12 +15,17 @@ AST* builtin_mul(size_t argc, AST** argv);
 // Divide nums.
 AST* builtin_div(size_t argc, AST** argv);
 
-#define NBUILTIN_FNS 4
-// The list of built-in functions.
-static AST* (*builtin_fns[NBUILTIN_FNS])(size_t argc, AST** argv) = {
-    builtin_sum, builtin_sub, builtin_mul, builtin_div
+struct builtin_data {
+    char* name;
+    AST* (*fn)(size_t argc, AST** argv);
 };
 
-static char* builtin_fns_names[NBUILTIN_FNS] = {"sum", "sub", "mul", "div"};
+static struct builtin_data BUILTIN_FNS[] = {
+    { "sum", builtin_sum },
+    { "sub", builtin_sub },
+    { "mul", builtin_mul },
+    { "div", builtin_div },
+};
+#define BUILTIN_FNS_LN (arrln(BUILTIN_FNS))
 
 #endif

src/include/util.h

@@ -4,6 +4,12 @@
 // Most of this file is cursed printing macros for `ast_print()`. Do not attempt
 // to comprehend.
 
+// Allocate a pointer with a type.
+#define talloc(T, X) T* X = malloc(sizeof(T));
+
+// Get the length of an array.
+#define arrln(A) (sizeof(A)/sizeof(*A))
+
 #ifdef DBG // Debug macros
 
 // Log a message.
@@ -101,7 +107,4 @@
 #define INDENT_FIELD_LIST_CLOSE                                                \
     printf(COL_BWHI "%s ]\n" COL_RESET, INDENT_spacing->buf);
 
-// Allocate a pointer with a type.
-#define talloc(T, X) T* X = malloc(sizeof(T));
-
 #endif

test/Unity

@@ -1 +1 @@
-Subproject commit cdf1d0297effc2736ee847e557b4275b4f02310b
+Subproject commit 73237c5d224169c7b4d2ec8321f9ac92e8071708