feat: finished variables declaration / assign

src/compiler/utils/fzl_symtable.c

@@ -0,0 +1,68 @@
+#include <compiler/utils/fzl_symtable.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+fzl_symtable_t *fzl_mksymt()
+{
+  fzl_symtable_t *tbl = malloc(sizeof(fzl_symtable_t));
+  if (!tbl)
+    return NULL;
+
+  tbl->remainder = 2;
+  tbl->size      = 0;
+  tbl->symbols   = malloc(tbl->remainder * sizeof(fzl_sym_t));
+  if (!tbl->symbols)
+    return NULL;
+
+  return tbl;
+}
+
+fzl_symtable_res_t fzl_symt_put(fzl_symtable_t *symt, char *name,
+                                fzl_type_t type)
+{
+  if (!symt)
+    return FZL_SYMTABLE_RESULT_ERR;
+
+  for (size_t i = 0; i < symt->size; i++)
+    if (strcmp(symt->symbols[i].name, name) == 0)
+      return FZL_SYMTABLE_RESULT_EXISTS;
+
+  if (symt->remainder <= symt->size)
+  {
+    symt->remainder *= 2;
+    symt->symbols = realloc(symt->symbols, symt->remainder * sizeof(fzl_sym_t));
+  }
+
+  symt->symbols[symt->size++] = (fzl_sym_t){.name = name, .type = type};
+  return FZL_SYMTABLE_RESULT_OK;
+}
+
+bool fzl_symt_get(fzl_symtable_t *symt, char *name, fzl_sym_t *res)
+{
+  if (!symt)
+    return false;
+
+  for (size_t i = 0; i < symt->size; i++)
+  {
+    if (strcmp(symt->symbols[i].name, name) == 0)
+    {
+      *res = symt->symbols[i];
+      return true;
+    }
+  }
+
+  return false;
+}
+
+void fzl_freesymt(fzl_symtable_t *symt)
+{
+  if (!symt)
+    return;
+
+  if (symt->symbols)
+    free(symt->symbols);
+
+  free(symt);
+}