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Keep it simple

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Frank Denis 2015-11-16 23:47:33 +01:00
parent 9337ecfa60
commit 55f6eb83f8
1 changed files with 4 additions and 15 deletions
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19
src/libsodium/sodium/utils.c
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@ -157,24 +157,13 @@ sodium_compare(const unsigned char *b1_, const unsigned char *b2_, size_t len)
int
sodium_is_zero(const unsigned char *n, const size_t nlen)
{
size_t i = 0U;
size_t i;
unsigned char c = 0U;
#if !defined(CPU_UNALIGNED_ACCESS) || !defined(NATIVE_LITTLE_ENDIAN)
uint_fast8_t c = 0U;
for (; i < nlen; i++) {
for (i = 0U; i < nlen; i++) {
c |= n[i];
}
return (int) ((((uint_fast16_t) c - 1U) >> 8) & 1U);
#else
uint_fast32_t c = 0U;
for (; i < (nlen & ~0x3); i += 4U) {
c |= *((const uint32_t *) (const void *) &n[i]);
}
for (; i < nlen; i++) {
c |= n[i];
}
return (int) ((((uint_fast64_t) c - 1U) >> 32) & 1U);
#endif
return 1 & ((c - 1) >> 8);
}
void