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| author | TG-Techie <39284876+TG-Techie@users.noreply.github.com> | 2020-03-06 13:57:31 -0500 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-03-06 13:57:31 -0500 |
| commit | 7198056bc31ebae22337af119c07c7dca03e85d5 (patch) | |
| tree | 421b1c044250320ae15500f8578f6fec529937fa /py/sequence.c | |
| parent | 6d4ffc69fdfe19366b15861694f97cbf77452937 (diff) | |
| parent | ba0c14f9ddf01f6cf98d278cbc4769a476342db0 (diff) | |
Merge pull request #2 from adafruit/5.0.x
5.0.x
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; |