stage1 大量重构

stage1/spl_scope.c

@@ -0,0 +1,46 @@
+#include "spl_scope.h"
+
+void spl_scope_init(spl_scope_t *scope) {
+    vec_init(scope->scopes);
+    vec_push(scope->scopes, (spl_scope_node_t){0});
+    scope->current_scope = 0;
+    scope->root_scope = 0;
+}
+
+void spl_scope_drop(spl_scope_t *scope) {
+    for (usize i = 0; i < vec_size(scope->scopes); ++i) {
+        map_free(vec_at(scope->scopes, i).symbols);
+    }
+    vec_free(scope->scopes);
+    scope->current_scope = 0;
+    scope->root_scope = 0;
+}
+
+spl_scope_id_t spl_scope_alloc(spl_scope_t *scope) {
+    spl_scope_node_t n = {0};
+    n.parent = scope->current_scope;
+    map_init(n.symbols, MAP_HASH_STR, MAP_CMP_STR);
+    vec_push(scope->scopes, n);
+    return vec_size(scope->scopes) - 1;
+}
+
+bool spl_scope_insert(spl_scope_t *scope, spl_scope_id_t id, spl_symbol_t symbol) {
+    Assert(id != 0 && id < vec_size(scope->scopes));
+    spl_scope_node_t *node = &vec_at(scope->scopes, id);
+    spl_symbol_t old = {0};
+    if (map_get(node->symbols, symbol.name, &old))
+        return false;
+    map_put(node->symbols, symbol.name, symbol);
+    return true;
+}
+
+bool spl_scope_find(spl_scope_t *scope, const char *name, spl_symbol_t *out) {
+    if (!scope || !name || !out)
+        return false;
+    for (spl_scope_id_t id = scope->current_scope; id != 0; id = vec_at(scope->scopes, id).parent) {
+        spl_scope_node_t *s = &vec_at(scope->scopes, id);
+        if (map_get(s->symbols, name, out))
+            return true;
+    }
+    return false;
+}