init basic

ccompiler/frontend/parser/symtab/scope.c

@@ -0,0 +1,43 @@
+// scope.c
+#include "scope.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct Scope Scope;
+
+Scope* scope_create(Scope* parent) {
+    Scope* scope = malloc(sizeof(Scope));
+    hmap_init(&scope->symbols);
+    scope->parent = parent;
+    scope->base_offset = 0;
+    scope->cur_offset = 0;
+    return scope;
+}
+
+void scope_destroy(Scope* scope) {
+    hmap_destroy(&scope->symbols);
+    free(scope);
+}
+
+void scope_insert(Scope* scope, const char* name, void* symbol) {
+    if (hmap_contains(&scope->symbols, name)) {
+        // 处理重复定义错误
+        fprintf(stderr, "Error: Symbol '%s' already defined\n", name);
+        exit(EXIT_FAILURE);
+    }
+    hmap_put(&scope->symbols, name, symbol);
+}
+
+void* scope_lookup(Scope* scope, const char* name) {
+    void* symbol = NULL;
+    while (scope) {
+        symbol = hmap_get(&scope->symbols, name);
+        if (symbol) break;
+        scope = scope->parent;
+    }
+    return symbol;
+}
+
+void* scope_lookup_current(Scope* scope, const char* name) {
+    return hmap_get(&scope->symbols, name);
+}