feat: use types of values in stack and instructions

Makefile

@@ -3,9 +3,10 @@
 # SPDX-License-Identifier: GPL-3.0
 
 wai: wai.c
-	gcc -ggdb -Wall -Wextra -o wai wai.c
+	gcc -Wall -Wextra -o wai wai.c
 
 # tests/factorial.wasm: tests/factorial.wat
 .PHONY: tests
 tests:
 	wat2wasm -o tests/factorial.wasm tests/factorial.wat
+

wai.c

@@ -30,6 +30,7 @@
 #include <string.h>
 #include <sys/stat.h>
 #include <inttypes.h>
+#include <sys/types.h>
 
 enum section {
   Section_Custom,
@@ -53,24 +54,9 @@ struct stack {
   size_t bytes;
 };
 
-#define MAX_FUNCTIONS 128
-enum export_desc {
-  Export_Func,
-  Export_Table,
-  Export_Mem,
-  Export_Global,
-};
-
-struct export_t {
-  u_char name[128];
-  size_t name_length;
-  uint32_t index;
-  enum export_desc description;
-};
-
 struct module {
   struct type_t *types;
-  u_char *funcs[MAX_FUNCTIONS];
+  u_char *funcs[128];
   struct table_t *tables;
   struct mem_t *mems;
   struct global_t *globals;
@@ -78,7 +64,7 @@ struct module {
   struct data_t *datas;
   struct start_t *start;
   struct import_t *imports;
-  struct export_t exports[MAX_FUNCTIONS];
+  struct export_t *exports;
   u_char *binary;
   struct stack stack;
   int scope;
@@ -366,27 +352,19 @@ int parse_section(struct module *module, u_char *binary, int len) {
     case Section_Export:
       printf("section: exports\n");
       int num_exports = binary[i];
-      
-      if(num_exports > MAX_FUNCTIONS) {
-	printf("Number of exports exceeds maximum number of functions in a module (%d)", MAX_FUNCTIONS);
-	return -1;
-      }
-      
       incr(i, len);
       for (int exports_i = 0; exports_i < num_exports; exports_i++) {
-	struct export_t *export = &module->exports[i];
-
-        export->name_length = binary[i];
+        int string_len = binary[i];
         incr(i, len);
-	
-        for (int si = 0; si < export->name_length; si++) {
-	  export->name[si] = binary[i];
+        printf("export name: ");
+        for (int si = 0; si < string_len; si++) {
+          putchar(binary[i]);
           incr(i, len);
         }
-	export->description = (int) binary[i];
+        putchar('\n');
+        // export kind
         incr(i, len);
-	export->index = (uint32_t) binary[i];
-	printf("export name: %s of type %d\n", export->name, export->description);
+        // export func index
         incr(i, len);
       }
       break;
@@ -441,6 +419,7 @@ int parse_module(u_char *binary, size_t len) {
   return i;
 }
 
+
 int main(int argc, char **argv) {
   
   if (argc != 2) {
@@ -458,7 +437,7 @@ int main(int argc, char **argv) {
   printf("size: %ld\n", st.st_size);
   
   u_char *binary = malloc(st.st_size);
-  fread(binary, st.st_size, 1, file);
+  fread(binary, st.st_size, st.st_size, file);
 
   if (parse_module(binary, st.st_size) == -1) {
     printf("error :(\n");