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| author | Sabas <sabasjimenez@gmail.com> | 2020-04-09 17:05:11 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-04-09 17:05:11 -0500 |
| commit | cac4fb0318015f344e191e3077e99ffdce347515 (patch) | |
| tree | d96c5d7010563f9db3f4e5fb2f981e5bb75c6345 /py/sequence.c | |
| parent | 2a47623283911c8ebac6152560affc8c419dbddf (diff) | |
| parent | b3b8b5ca71dc58415083180d04b407185514c216 (diff) | |
Merge branch 'master' into nfc_copy
Diffstat (limited to 'py/sequence.c')
| -rw-r--r-- | py/sequence.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/py/sequence.c b/py/sequence.c index a750e5bac..0e668ea2a 100644 --- a/py/sequence.c +++ b/py/sequence.c @@ -34,6 +34,11 @@ #define SWAP(type, var1, var2) { type t = var2; var2 = var1; var1 = t; } +#if __GNUC__ < 5 +// n.b. does not actually detect overflow! +#define __builtin_mul_overflow(a, b, x) (*(x) = (a) * (b), false) +#endif + // Detect when a multiply causes an overflow. size_t mp_seq_multiply_len(size_t item_sz, size_t len) { size_t new_len; |