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tccgen: better find_field() not found error messages

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Also: return all of 'cumofs' (no extra '+' required at caller)
This commit is contained in:
grischka 2022-12-22 13:08:36 +01:00
parent 909d58dd5e
commit 62d857a6f9
1 changed files with 26 additions and 17 deletions
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37
tccgen.c
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@ -3920,21 +3920,34 @@ redo:
static Sym * find_field (CType *type, int v, int *cumofs)
{
Sym *s = type->ref;
v |= SYM_FIELD;
int v1 = v | SYM_FIELD;
while ((s = s->next) != NULL) {
if ((s->v & SYM_FIELD) &&
(s->type.t & VT_BTYPE) == VT_STRUCT &&
(s->v & ~SYM_FIELD) >= SYM_FIRST_ANOM) {
Sym *ret = find_field (&s->type, v, cumofs);
if (s->v == v1) {
*cumofs += s->c;
return s;
}
if ((s->type.t & VT_BTYPE) == VT_STRUCT
&& s->v >= (SYM_FIRST_ANOM | SYM_FIELD)) {
/* try to find field in anonymous sub-struct/union */
Sym *ret = find_field (&s->type, v1, cumofs);
if (ret) {
*cumofs += s->c;
return ret;
}
}
if (s->v == v)
break;
}
return s;
if (!(v & SYM_FIELD)) { /* top-level call */
s = type->ref;
if (s->c < 0)
tcc_error("dereferencing incomplete type '%s'",
get_tok_str(s->v & ~SYM_STRUCT, 0));
else
tcc_error("field not found: %s",
get_tok_str(v, &tokc));
}
return NULL;
}
static void check_fields (CType *type, int check)
@ -5895,11 +5908,9 @@ special_math_val:
if (tok == TOK_CINT || tok == TOK_CUINT)
expect("field name");
s = find_field(&vtop->type, tok, &cumofs);
if (!s)
tcc_error("field not found: %s", get_tok_str(tok & ~SYM_FIELD, &tokc));
/* add field offset to pointer */
vtop->type = char_pointer_type; /* change type to 'char *' */
vpushi(cumofs + s->c);
vpushi(cumofs);
gen_op('+');
/* change type to field type, and set to lvalue */
vtop->type = s->type;
@ -7349,12 +7360,10 @@ static int decl_designator(init_params *p, CType *type, unsigned long c,
expect("struct/union type");
cumofs = 0;
f = find_field(type, l, &cumofs);
if (!f)
expect("field");
if (cur_field)
*cur_field = f;
type = &f->type;
c += cumofs + f->c;
c += cumofs;
}
cur_field = NULL;
}