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typedef struct {
FILE *outc;
unsigned long ident_counter;
ParsedFile *file;
Block *block;
Identifier main_ident;
} CGenerator;
static void cgen_create(CGenerator *g, FILE *out, Identifiers *ids) {
g->outc = out;
g->ident_counter = 0;
g->main_ident = ident_get(ids, "main");
}
static void cgen_block_enter(CGenerator *g, Block *b) {
g->block = b;
Statement *stmts;
if (b == NULL) {
stmts = g->file->stmts;
} else {
stmts = b->stmts;
}
block_enter(b, stmts);
}
static void cgen_block_exit(CGenerator *g, Block *into) {
Block *b = g->block;
Statement *stmts;
if (b == NULL) {
stmts = g->file->stmts;
} else {
stmts = b->stmts;
}
block_exit(b, stmts);
g->block = into;
}
static inline FILE *cgen_writing_to(CGenerator *g) {
return g->outc; /* for now */
}
static void cgen_write(CGenerator *g, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vfprintf(cgen_writing_to(g), fmt, args);
va_end(args);
}
static void cgen_ident(CGenerator *g, Identifier i) {
if (i == g->main_ident) {
/* don't conflict with C's main! */
cgen_write(g, "main__");
} else {
fprint_ident(cgen_writing_to(g), i);
}
}
static bool cgen_type_post(CGenerator *g, Type *t, Location where);
static bool cgen_type_pre(CGenerator *g, Type *t, Location where) {
switch (t->kind) {
case TYPE_BUILTIN:
switch (t->builtin) {
case BUILTIN_I8: cgen_write(g, "i8"); break;
case BUILTIN_I16: cgen_write(g, "i16"); break;
case BUILTIN_I32: cgen_write(g, "i32"); break;
case BUILTIN_I64: cgen_write(g, "i64"); break;
case BUILTIN_U8: cgen_write(g, "u8"); break;
case BUILTIN_U16: cgen_write(g, "u16"); break;
case BUILTIN_U32: cgen_write(g, "u32"); break;
case BUILTIN_U64: cgen_write(g, "u64"); break;
case BUILTIN_CHAR: cgen_write(g, "char"); break;
case BUILTIN_BOOL: cgen_write(g, "bool"); break;
case BUILTIN_F32: cgen_write(g, "f32"); break;
case BUILTIN_F64: cgen_write(g, "f64"); break;
} break;
case TYPE_VOID: cgen_write(g, "void"); break;
case TYPE_UNKNOWN:
err_print(t->where, "Can't determine type.");
return false;
}
return true;
}
static bool cgen_type_post(CGenerator *g, Type *t, Location where) {
return true;
}
static bool cgen_fn_header(CGenerator *g, FnExpr *f, Location where) {
if (!cgen_type_pre(g, &f->ret_type, where)) return false;
cgen_write(g, " ");
if (f->c.name) {
cgen_ident(g, f->c.name);
} else {
/* TODO */
}
if (!cgen_type_post(g, &f->ret_type, where)) return false;
cgen_write(g, "(");
arr_foreach(f->params, Declaration, d) {
arr_foreach(d->idents, Identifier, i) {
if (!cgen_type_pre(g, &d->type, where))
return false;
cgen_ident(g, *i);
if (!cgen_type_post(g, &d->type, where))
return false;
}
}
cgen_write(g, ")");
return true;
}
static bool cgen_decls_file(CGenerator *g, ParsedFile *f);
static bool cgen_file(CGenerator *g, ParsedFile *f) {
g->file = f;
cgen_write(g, "#include <stdint.h>\n"
"typedef int8_t i8;\n"
"typedef int16_t i16;\n"
"typedef int32_t i32;\n"
"typedef int64_t i64;\n"
"typedef uint8_t u8;\n"
"typedef uint16_t u16;\n"
"typedef uint32_t u32;\n"
"typedef uint64_t u64;\n"
"typedef float f32;\n"
"typedef double f64;\n"
"typedef unsigned char bool;\n"
"#define false ((bool)0)\n"
"#define true ((bool)1)\n\n\n");
cgen_block_enter(g, NULL);
if (!cgen_decls_file(g, f))
return false;
cgen_write(g, "/* code */\n");
cgen_block_exit(g, NULL);
cgen_write(g, "int main() {\n\tmain__();\n\treturn 0;\n}\n");
return true;
}
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