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/*
* C code generator. Does not actually call the compiler,
* that's done by the Makefile. The other `out*.c` files handle
* specific parts of C code generation.
*
* Copyright © 2020-2025 Samuel Lidén Borell <samuel@kodafritt.se>
*
* SPDX-License-Identifier: EUPL-1.2+
*/
#include <assert.h>
#include <stdio.h>
#include "compiler.h"
#include "out.h"
static void emit_header(void)
{
outf(
"/* Generated code from bootstrap compiler */\n"
"#include \"rtl.h\"\n"
"\n");
}
static void emit_footer(void)
{
}
void emit_ident(struct Ident *ident)
{
outf("%.*s", ident->node.length, ident->node.name);
}
/* FIXME arrays, optional types, generics... */
void emit_typeref_prefix(struct TypeRef *tr)
{
/* TODO output parantheses for nested types e.g. array of pointer etc. */
switch (tr->kind) {
case TR_UNKNOWN:
ast_error("TR_UNKNOWN encountered at codegen time");
case TR_BOOL:
outf("bool ");
break;
case TR_INT:
/* TODO unsigned and uint64 */
outf("int ");
break;
case TR_STRING:
case TR_CLASS:
emit_type(tr->u.class_);
outc(' ');
outc('*');
}
}
void emit_typeref_suffix(struct TypeRef *tr)
{
/* TODO arrays? */
(void)tr;
}
/*static void emit_decl(struct Type *type, struct Ident *ident)
{
emit_type_prefix(type);
if (ident) {
emit_ident(ident);
}
emit_type_suffix(type);
}*/
/*static void emit_vardecl(struct Var *var)
{
}
*/
void emit_type(struct Type *type)
{
/* FIXME this leads to a name conflict. */
/* FIXME currently, there's no check that nested/inner types start with `_` */
outf("struct ");
if (type->outer) {
emit_ident(&type->outer->ident);
}
emit_ident(&type->ident);
}
static void emit_module(struct Module *mod)
{
struct Type *type, *inner;
emit_string_constants();
if (mod->types_list) {
outc('\n');
/* Pre-declare types */
for (type = mod->types_list; type; type = type->next) {
predeclare_type(type);
for (inner = type->inner_types_list; inner; inner = inner->next) {
assert(inner->inner_types_list == NULL);
predeclare_type(inner);
}
}
/* Emit types */
/* XXX this is tricky if structs are allowed to be embedded
without a pointer. Then it has to be done in the correct order */
for (type = mod->types_list; type; type = type->next) {
define_type(type);
for (inner = type->inner_types_list; inner; inner = inner->next) {
define_type(inner);
}
}
}
outc('\n');
/* Pre-declare functions */
predeclare_funcs(mod->funcs_list);
for (type = mod->types_list; type; type = type->next) {
predeclare_funcs(type->funcs_list);
for (inner = type->inner_types_list; inner; inner = inner->next) {
predeclare_funcs(inner->funcs_list);
}
}
/* Emit function bodies */
define_funcs(mod->funcs_list);
for (type = mod->types_list; type; type = type->next) {
define_funcs(type->funcs_list);
for (inner = type->inner_types_list; inner; inner = inner->next) {
define_funcs(inner->funcs_list);
}
}
}
static void emit_code(void)
{
struct Module *mod;
for (mod = modules; mod; mod = mod->next) {
emit_module(mod);
}
/* TODO test code. replace this.
maybe the stdlib should be in a separate object file?
(which could contain `main()`) */
beginf("int main(void) {\n");
indentf("printf(\"Test\\n\");\n");
indentf("return EXIT_SUCCESS;\n");
endf("}\n");
}
void emit_c_code(const char *filename)
{
outfile_path = filename;
outfile = fopen(filename, "wb");
if (!outfile) {
io_error();
}
emit_header();
emit_code();
emit_footer();
if (fclose(outfile) < 0) {
io_error();
}
}
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