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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 bool cgen_decls_stmt(CGenerator *g, Statement *s);
static bool cgen_decls_block(CGenerator *g, Block *b);
static bool cgen_decls_decl(CGenerator *g, Declaration *d);
static bool cgen_decls_fn_instances(CGenerator *g, Expression *e) {
assert(e->kind == EXPR_FN);
FnExpr *f = e->fn;
assert(e->type.fn.constness);
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;
if (!cgen_fn_header(g, &(*data)->fn, e->where, (*data)->c.id, (*data)->val.tuple[0].u64))
return false;
cgen_write(g, ";");
cgen_nl(g);
}
}
++data;
}
return true;
}
static bool cgen_decls_expr(CGenerator *g, Expression *e) {
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++;
FnType *fn_type = &e->type.fn;
if (fn_type->constness) {
if (!cgen_decls_fn_instances(g, e))
return false;
} else {
if (cgen_should_gen_fn(e->fn)) {
fn_enter(e->fn, 0);
if (!cgen_fn_header(g, e->fn, e->where, 0, 0))
return false;
cgen_write(g, ";");
cgen_nl(g);
fn_exit(e->fn);
}
}
} break;
case EXPR_TYPE: {
Type *type = &e->typeval;
if (type->kind == TYPE_STRUCT) {
StructDef *sdef = type->struc;
if (!(sdef->flags & STRUCT_DEF_CGENERATED)) {
/* generate struct definition */
cgen_write(g, "struct ");
if (sdef->c.name)
cgen_ident(g, sdef->c.name);
else
cgen_ident_id(g, sdef->c.id);
cgen_write(g, "{");
cgen_nl(g);
++g->indent_lvl;
arr_foreach(sdef->fields, Field, f) {
if (!cgen_type_pre(g, f->type, e->where)) return false;
cgen_write(g, " ");
cgen_ident(g, f->name);
if (!cgen_type_post(g, f->type, e->where)) return false;
cgen_write(g, ";");
cgen_nl(g);
}
--g->indent_lvl;
cgen_write(g, "};");
cgen_nl(g);
sdef->flags |= STRUCT_DEF_CGENERATED;
}
}
} break;
default:
break;
}
return true;
}
static bool cgen_decls_block(CGenerator *g, Block *b) {
Block *prev = g->block;
if (!cgen_block_enter(g, b))
return false;
arr_foreach(b->stmts, Statement, s)
if (!cgen_decls_stmt(g, s))
return false;
if (b->ret_expr && !cgen_decls_expr(g, b->ret_expr))
return false;
cgen_block_exit(g, prev);
return true;
}
static bool cgen_decls_decl(CGenerator *g, Declaration *d) {
if (cgen_fn_is_direct(g, d)) {
d->expr.fn->c.name = d->idents[0];
if (d->expr.type.fn.constness) {
if (!cgen_decls_fn_instances(g, &d->expr))
return false;
} else {
if (cgen_should_gen_fn(d->expr.fn)) {
fn_enter(d->expr.fn, 0);
if (!cgen_fn_header(g, d->expr.fn, d->where, 0, 0))
return false;
cgen_write(g, ";");
cgen_nl(g);
fn_exit(d->expr.fn);
}
}
cgen_recurse_subexprs(g, (&d->expr), cgen_decls_expr, cgen_decls_block, cgen_decls_decl);
} else if (d->flags & DECL_HAS_EXPR) {
if (!cgen_decls_expr(g, &d->expr))
return false;
}
return true;
}
static bool cgen_decls_stmt(CGenerator *g, Statement *s) {
switch (s->kind) {
case STMT_DECL:
if (!cgen_decls_decl(g, &s->decl))
return false;
break;
case STMT_EXPR:
if (!cgen_decls_expr(g, &s->expr))
return false;
break;
case STMT_RET:
if (s->ret.flags & RET_HAS_EXPR)
if (!cgen_decls_expr(g, &s->ret.expr))
return false;
break;
}
return true;
}
static bool cgen_decls_file(CGenerator *g, ParsedFile *f) {
cgen_write(g, "/* declarations */\n");
arr_foreach(f->stmts, Statement, s) {
if (!cgen_decls_stmt(g, s))
return false;
}
return true;
}
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