refactor masm to add codegen step

1 files changed, 43 insertions, 0 deletions

diff --git a/masm/reftab.c b/masm/reftab.c
new file mode 100644
index 0000000..f8793e1
--- /dev/null
+++ b/masm/reftab.c
@@ -0,0 +1,43 @@
+#include <stdlib.h>
+#include <merror.h>
+
+#include "tab.h"
+
+#define REFTAB_INIT_LEN 8
+
+int reftab_init(struct reference_table *reftab)
+{
+	reftab->size = REFTAB_INIT_LEN;
+	reftab->len = 0;
+	reftab->references = malloc(sizeof(struct reference)
+			     * REFTAB_INIT_LEN);
+
+	if (reftab->references == NULL) {
+		PERROR("cannot alloc");
+		return M_ERROR;
+	}
+
+	return M_SUCCESS;
+}
+
+void reftab_free(struct reference_table *reftab)
+{
+	free(reftab->references);
+}
+
+int reftab_push(struct reference_table *reftab, struct reference *ref)
+{
+	if (reftab->len >= reftab->size) {
+		reftab->size *= 2;
+		reftab->references = realloc(reftab->references,
+			       sizeof(struct reference) * reftab->size);
+
+		if (reftab->references == NULL) {
+			PERROR("cannot realloc");
+			return M_ERROR;
+		}
+	}
+
+	reftab->references[reftab->len++] = *ref;
+	return M_SUCCESS;
+}