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/*
Copyright (C) 2019, 2020 Leo Tenenbaum.
This file is part of toc. toc is distributed under version 3 of the GNU General Public License, without any warranty whatsoever.
You should have received a copy of the GNU General Public License along with toc. If not, see <https://www.gnu.org/licenses/>.
*/
static void cgen_decls_stmt(CGenerator *g, Statement *s);
static void cgen_decls_block(CGenerator *g, Block *b);
static void cgen_decls_decl(CGenerator *g, Declaration *d);
static void cgen_decls_type(CGenerator *g, Type *type) {
if (!(type->flags & TYPE_IS_RESOLVED)) /* non-instance constant fn parameter type */
return;
if (type->kind == TYPE_STRUCT) {
StructDef *sdef = type->struc;
if (!(sdef->flags & STRUCT_DEF_CGEN_DEFINED)) {
/* generate struct definition */
cgen_write(g, "struct ");
cgen_struct_name(g, sdef);
cgen_write(g, "{");
cgen_nl(g);
++g->indent_lvl;
arr_foreach(sdef->fields, Field, f) {
cgen_type_pre(g, &f->type, sdef->where);
cgen_write(g, " ");
cgen_ident_simple(g, f->name);
cgen_type_post(g, &f->type, sdef->where);
cgen_write(g, ";");
cgen_nl(g);
}
--g->indent_lvl;
cgen_write(g, "};");
cgen_nl(g);
sdef->flags |= STRUCT_DEF_CGEN_DEFINED;
}
}
cgen_recurse_subtypes(cgen_decls_type, g, type);
}
static void cgen_single_fn_decl(CGenerator *g, FnExpr *f, U64 instance, U64 which_are_const) {
if (cgen_should_gen_fn(f)) {
cgen_fn_header(g, f, instance, which_are_const);
cgen_write(g, ";");
cgen_nl(g);
}
}
static void cgen_decls_fn_instances(CGenerator *g, FnExpr *f) {
Instance **data = f->instances.data;
for (U64 i = 0; i < f->instances.cap; ++i) {
if (f->instances.occupied[i]) {
if (cgen_should_gen_fn((*data)->fn)) {
(*data)->fn->c.name = f->c.name;
(*data)->fn->c.id = f->c.id;
cgen_single_fn_decl(g, (*data)->fn, (*data)->c.id, (*data)->val.tuple[0].u64);
cgen_write(g, ";");
cgen_nl(g);
}
}
++data;
}
}
static void cgen_fn_decl(CGenerator *g, FnExpr *f, Type *t) {
if (f->flags & FN_EXPR_FOREIGN) {
/* foreign function declaration */
cgen_write(g, "extern ");
Type *fn_types = t->fn.types;
const char *foreign_name = f->foreign.name;
cgen_type_pre(g, &fn_types[0], f->where);
cgen_write(g, " %s", foreign_name);
cgen_write(g, "(");
arr_foreach(fn_types, Type, sub) {
if (sub == fn_types) continue;
if (sub != fn_types+1)
cgen_write(g, ", ");
cgen_type_pre(g, t, f->where);
cgen_type_post(g, t, f->where);
}
cgen_write(g, ")");
cgen_type_post(g, &fn_types[0], f->where);
cgen_write(g, ";");
if (!f->c.name || !ident_eq_str(f->c.name, foreign_name)) {
cgen_write(g, "static ");
cgen_type_pre(g, t, f->where);
cgen_write(g, " const ");
cgen_fn_name(g, f);
cgen_type_post(g, t, f->where);
cgen_write(g, " = %s;", foreign_name);
}
cgen_nl(g);
return;
}
FnType *fn_type = &t->fn;
if (fn_type->constness) {
cgen_decls_fn_instances(g, f);
} else {
cgen_single_fn_decl(g, f, 0, 0);
}
}
static void cgen_decls_expr(CGenerator *g, Expression *e) {
assert(e->flags & EXPR_FOUND_TYPE);
cgen_recurse_subexprs(g, e, cgen_decls_expr, cgen_decls_block, cgen_decls_decl);
switch (e->kind) {
case EXPR_FN: {
FnExpr *f = e->fn;
f->c.name = NULL;
if (!f->c.id)
f->c.id = ++g->ident_counter;
cgen_fn_decl(g, e->fn, &e->type);
} break;
case EXPR_TYPE: {
Type *type = &e->typeval;
cgen_decls_type(g, type);
} break;
case EXPR_CAST:
cgen_decls_type(g, &e->cast.type);
break;
case EXPR_BINARY_OP: {
Type *lhs_type = &e->binary.lhs->type;
if (lhs_type->kind == TYPE_PTR)
lhs_type = lhs_type->ptr;
} break;
default:
break;
}
}
static void cgen_decls_block(CGenerator *g, Block *b) {
Block *prev_block = g->block;
g->block = b;
arr_foreach(b->stmts, Statement, s)
cgen_decls_stmt(g, s);
if (b->ret_expr) cgen_decls_expr(g, b->ret_expr);
g->block = prev_block;
}
static void cgen_decls_decl(CGenerator *g, Declaration *d) {
cgen_decls_type(g, &d->type);
if (cgen_fn_is_direct(g, d)) {
cgen_fn_decl(g, d->expr.fn, &d->expr.type);
cgen_recurse_subexprs(g, (&d->expr), cgen_decls_expr, cgen_decls_block, cgen_decls_decl);
} else {
if (d->flags & DECL_HAS_EXPR) {
cgen_decls_expr(g, &d->expr);
}
if ((g->block == NULL || (g->block->flags & BLOCK_IS_NMS)) && g->fn == NULL) {
for (int i = 0, n_idents = (int)arr_len(d->idents); i < n_idents; ++i) {
Identifier ident = d->idents[i];
Type *type = decl_type_at_index(d, i);
if (!type_is_compileonly(type)) {
if (!(d->flags & DECL_EXPORT))
cgen_write(g, "static ");
cgen_type_pre(g, type, d->where);
cgen_write(g, " ");
cgen_ident(g, ident);
cgen_type_post(g, type, d->where);
if (d->flags & DECL_HAS_EXPR) {
Value *val = decl_val_at_index(d, i);
cgen_write(g, " = ");
cgen_val(g, *val, type, d->where);
} else {
cgen_write(g, " = ");
cgen_zero_value(g, type);
}
cgen_write(g, ";");
cgen_nl(g);
}
}
}
}
}
static void cgen_decls_stmt(CGenerator *g, Statement *s) {
switch (s->kind) {
case STMT_DECL:
cgen_decls_decl(g, s->decl);
break;
case STMT_EXPR:
cgen_decls_expr(g, &s->expr);
break;
case STMT_RET:
if (s->ret.flags & RET_HAS_EXPR)
cgen_decls_expr(g, &s->ret.expr);
break;
case STMT_INCLUDE:
if (s->inc.inc_file && (s->inc.inc_file->flags & INC_FILE_CGEND_DECLS)) {
/* already generated */
} else {
if (s->inc.inc_file) s->inc.inc_file->flags |= INC_FILE_CGEND_DECLS;
arr_foreach(s->inc.stmts, Statement, sub)
cgen_decls_stmt(g, sub);
}
break;
}
}
static void cgen_decls_file(CGenerator *g, ParsedFile *f) {
cgen_write(g, "/* declarations */\n");
arr_foreach(f->stmts, Statement, s) {
cgen_decls_stmt(g, s);
}
}
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