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Check enum range for typed enums
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This commit is contained in:
herman ten brugge 2025-08-24 11:22:38 +02:00
parent 6ca6328e29
commit 8c59fd3cb6
1 changed files with 12 additions and 2 deletions
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14
tccgen.c
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@ -4431,13 +4431,19 @@ do_decl:
/* non empty enums are not allowed */
ps = &s->next;
if (u == VT_ENUM) {
long long ll = 0, pl = 0, nl = 0;
long long ll = 0, pl = 0, nl = 0, ni = 0, pi = 0;
unsigned long long mu = 0;
CType t;
t.ref = s;
/* enum symbols have static storage */
t.t = VT_INT|VT_STATIC|VT_ENUM_VAL;
if (bt)
if (bt) {
t.t = bt|VT_STATIC|VT_ENUM_VAL;
mu = 1llu << (type_size(&t, &align) * 8 - 1);
pi = mu - 1;
ni = -mu;
mu = (mu << 1) - 1u;
}
for(;;) {
v = tok;
if (v < TOK_UIDENT)
@ -4451,6 +4457,10 @@ do_decl:
next();
ll = expr_const64();
}
if (bt && (t.t & VT_UNSIGNED ? (unsigned long long)ll > mu
: ll < ni || ll > pi))
tcc_error("enumerator value outside the range of underlying type '%s'",
get_tok_str(v, NULL));
ss = sym_push(v, &t, VT_CONST, 0);
ss->enum_val = ll;
*ps = ss, ps = &ss->next;