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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_sdecls_stmt(CGenerator *g, Statement *s);
static void cgen_sdecls_decl(CGenerator *g, Declaration *d);
static void cgen_sdecls_expr(CGenerator *g, Expression *e);
/* i is the name for this type, NULL if not available */
static void cgen_sdecls_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;
/* we'll actually define the struct later; here we can just declare it */
if (sdef->flags & STRUCT_DEF_CGEN_DECLARED) {
/* we've already done this */
} else {
cgen_write(g, "struct ");
if (!sdef->name) {
sdef->c.id = ++g->ident_counter;
}
cgen_struct_name(g, sdef);
cgen_write(g, ";");
cgen_nl(g);
sdef->flags |= STRUCT_DEF_CGEN_DECLARED;
}
}
cgen_recurse_subtypes(cgen_sdecls_type, g, type);
}
static void cgen_sdecls_block(CGenerator *g, Block *b) {
Block *prev_block = g->block;
g->block = b;
arr_foreach(b->stmts, Statement, s)
cgen_sdecls_stmt(g, s);
if (b->ret_expr)
cgen_sdecls_expr(g, b->ret_expr);
g->block = prev_block;
}
static char *cgen_nms_prefix_part(CGenerator *g, Namespace *n) {
char *s;
while (n->points_to) {
n = n->points_to;
}
if (n->associated_ident) {
size_t ident_len = n->associated_ident->len;
s = malloc(ident_len + 3);
memcpy(s, n->associated_ident->str, ident_len);
s[ident_len] = '_';
s[ident_len+1] = '_';
s[ident_len+2] = '\0';
} else {
s = calloc(CGEN_IDENT_ID_STR_SIZE + 3, 1);
cgen_ident_id_to_str(s, ++g->ident_counter);
size_t len = strlen(s);
s[len] = '_';
s[len+1] = '_';
s[len+2] = '\0';
}
return s;
}
static void cgen_sdecls_expr(CGenerator *g, Expression *e) {
switch (e->kind) {
case EXPR_CAST:
cgen_sdecls_type(g, &e->cast.type);
break;
case EXPR_FN:
/* needs to go before decls_cgen.c... */
e->fn->c.id = ++g->ident_counter;
break;
case EXPR_TYPE:
cgen_sdecls_type(g, e->typeval);
break;
case EXPR_NMS: {
char *prefix_part = cgen_nms_prefix_part(g, e->nms);
size_t prefix_part_len = strlen(prefix_part);
char const *prev_prefix = g->nms_prefixes ? *(char const **)arr_last(g->nms_prefixes)
: "";
size_t prev_prefix_len = strlen(prev_prefix);
char *new_prefix = cgen_malloc(g, prev_prefix_len + prefix_part_len + 1);
memcpy(new_prefix, prev_prefix, prev_prefix_len);
memcpy(new_prefix + prev_prefix_len, prefix_part, prefix_part_len);
free(prefix_part);
*(char const **)arr_add(&g->nms_prefixes) = new_prefix;
new_prefix[prev_prefix_len + prefix_part_len] = 0;
e->nms->c.prefix = new_prefix;
} break;
default: break;
}
if (e->kind != EXPR_IDENT) {
cgen_recurse_subexprs(g, e, cgen_sdecls_expr, cgen_sdecls_block, cgen_sdecls_decl);
}
if (e->kind == EXPR_NMS) {
arr_remove_last(&g->nms_prefixes);
}
}
static void cgen_sdecls_decl(CGenerator *g, Declaration *d) {
cgen_sdecls_type(g, &d->type);
if (cgen_fn_is_direct(g, d)) {
d->expr.fn->c.name = d->idents[0];
}
for (int idx = 0; idx < (int)arr_len(d->idents); ++idx) {
Type *type = decl_type_at_index(d, idx);
if (type_is_builtin(type, BUILTIN_TYPE) && !(d->flags & DECL_IS_PARAM)) {
Value *val = decl_val_at_index(d, idx);
cgen_sdecls_type(g, val->type);
}
}
if (d->flags & DECL_HAS_EXPR) {
cgen_sdecls_expr(g, &d->expr);
if (d->flags & DECL_EXPORT) {
if (d->expr.kind == EXPR_FN)
d->expr.fn->flags |= FN_EXPR_EXPORT;
}
}
}
static void cgen_sdecls_stmt(CGenerator *g, Statement *s) {
switch (s->kind) {
case STMT_DECL:
cgen_sdecls_decl(g, s->decl);
break;
case STMT_EXPR:
cgen_sdecls_expr(g, &s->expr);
break;
case STMT_RET:
if (s->ret.flags & RET_HAS_EXPR)
cgen_sdecls_expr(g, &s->ret.expr);
break;
case STMT_INCLUDE:
if (s->inc.inc_file && (s->inc.inc_file->flags & INC_FILE_CGEND_SDECLS)) {
/* already generated */
} else {
if (s->inc.inc_file) s->inc.inc_file->flags |= INC_FILE_CGEND_SDECLS;
arr_foreach(s->inc.stmts, Statement, sub)
cgen_sdecls_stmt(g, sub);
}
break;
}
}
static void cgen_sdecls_file(CGenerator *g, ParsedFile *f) {
arr_foreach(f->stmts, Statement, s) {
cgen_sdecls_stmt(g, s);
}
}
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