lang: start implementing code generation (ast to ir) facility

lang/codegen/codegen.c

@@ -0,0 +1,69 @@
+#include "codegen.h"
+
+#include <ivy/lang/codegen.h>
+#include <mie/builder.h>
+#include <mie/module.h>
+#include <stdlib.h>
+#include <string.h>
+
+enum ivy_status ivy_codegen_create(struct ivy_codegen **out)
+{
+	struct ivy_codegen *gen = malloc(sizeof *gen);
+	if (!gen) {
+		return IVY_ERR_NO_MEMORY;
+	}
+
+	memset(gen, 0x0, sizeof *gen);
+
+	gen->c_ctx = mie_ctx_create();
+
+	*out = gen;
+	return IVY_OK;
+}
+
+void ivy_codegen_destroy(struct ivy_codegen *gen)
+{
+	if (gen->c_module) {
+		mie_value_destroy(MIE_VALUE(gen->c_module));
+	}
+
+	if (gen->c_builder) {
+		mie_builder_destroy(gen->c_builder);
+	}
+
+	if (gen->c_ctx) {
+		mie_ctx_destroy(gen->c_ctx);
+	}
+
+	free(gen);
+}
+
+enum ivy_status ivy_codegen_start_module(struct ivy_codegen *gen)
+{
+	if (gen->c_module || gen->c_builder) {
+		return IVY_ERR_BAD_STATE;
+	}
+
+	gen->c_module = mie_module_create();
+	gen->c_builder = mie_builder_create(gen->c_ctx, gen->c_module);
+
+	return IVY_OK;
+}
+
+enum ivy_status ivy_codegen_end_module(
+	struct ivy_codegen *gen, struct mie_module **out)
+{
+	if (!gen->c_module) {
+		return IVY_ERR_BAD_STATE;
+	}
+
+	struct mie_module *module = gen->c_module;
+	mie_builder_destroy(gen->c_builder);
+
+	gen->c_module = NULL;
+	gen->c_builder = NULL;
+
+	*out = module;
+
+	return IVY_OK;
+}