1 files changed, 36 insertions, 0 deletions
diff --git a/Scope.c b/Scope.c
new file mode 100644
index 0000000..3df00b9
--- /dev/null
+++ b/Scope.c
@@ -0,0 +1,36 @@
+#include "Scope.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <xxhash.h>
+
+Scope *scope_create(const Scope *parent)
+{
+	Scope *const scope = malloc(sizeof(Scope));
+	if (scope == NULL) {
+		perror("scope_create");
+		return NULL;
+	}
+	scope->used = 0;
+	scope->parent = parent;
+	return scope;
+}
+
+int scope_insert(Scope *scope, const char *word, int value)
+{
+	if (scope->used >= SCOPE_WORD_MAX) {
+		fprintf(stderr, "scope full\n");
+		return 1;
+	}
+	const XXH32_hash_t hash = XXH32(word, strlen(word), 0);
+	for (int i = 0; i < scope->used; i++)
+		if (scope->words_hash[i] == hash) {
+			fprintf(stderr, "shadowed word\n");
+			return 1;
+		}
+	scope->words[scope->used] = word;
+	scope->values[scope->used] = value;
+	scope->words_hash[scope->used] = hash;
+	scope->used += 1;
+	return 0;
+}