1 files changed, 27 insertions, 0 deletions
diff --git a/src/symtab.c b/src/symtab.c
new file mode 100644
index 0000000..279fdb9
--- /dev/null
+++ b/src/symtab.c
@@ -0,0 +1,27 @@
+#include <stddef.h>
+#include <stdint.h>
+
+#include "alloc.h"
+#include "symtab.h"
+#include "strview.h"
+
+struct symtab {
+	symtab_t *child[4];
+	strview_t key;
+	symval_t val;
+};
+
+symval_t *
+symtab_insert(symtab_t **m, strview_t sv, arena_t *a)
+{
+	for (uint64_t h = strview_hash(sv); *m; h <<= 2) {
+		if (strview_eq(sv, (*m)->key))
+			return &(*m)->val;
+		m = &(*m)->child[h >> 62];
+	}
+	if (a == NULL)
+		return NULL;
+	*m = arena_new(a, symtab_t, 1);
+	(*m)->key = sv;
+	return &(*m)->val;
+}