diff options
Diffstat (limited to 'mempsetelem.c')
| -rw-r--r-- | mempsetelem.c | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/mempsetelem.c b/mempsetelem.c index cf84702..61b202b 100644 --- a/mempsetelem.c +++ b/mempsetelem.c @@ -1,5 +1,5 @@ /* See LICENSE file for copyright and license details. */ -#include "libsimple.h" +#include "common.h" #ifndef TEST @@ -12,6 +12,8 @@ libsimple_mempsetelem(void *buf_, const void *item, size_t width, size_t n) case 1: return &((char *)memset(buf_, *(const char *)item, n))[n]; case 2: + if ((uintptr_t)buf_ % _Alignof(uint16_t) || (uintptr_t)item % _Alignof(uint16_t)) + goto misaligned; { uint16_t *buf = buf_; uint16_t *end = &buf[n]; @@ -21,6 +23,8 @@ libsimple_mempsetelem(void *buf_, const void *item, size_t width, size_t n) return buf; } case 4: + if ((uintptr_t)buf_ % _Alignof(uint32_t) || (uintptr_t)item % _Alignof(uint32_t)) + goto misaligned; { uint32_t *buf = buf_; uint32_t *end = &buf[n]; @@ -30,6 +34,8 @@ libsimple_mempsetelem(void *buf_, const void *item, size_t width, size_t n) return buf; } case 8: + if ((uintptr_t)buf_ % _Alignof(uint64_t) || (uintptr_t)item % _Alignof(uint64_t)) + goto misaligned; { uint64_t *buf = buf_; uint64_t *end = &buf[n]; @@ -39,6 +45,7 @@ libsimple_mempsetelem(void *buf_, const void *item, size_t width, size_t n) return buf; } default: + misaligned: { char *buf = buf_; size_t i; @@ -57,8 +64,8 @@ libsimple_mempsetelem(void *buf_, const void *item, size_t width, size_t n) int main(void) { - char buf_[4096]; - char *buf = buf_; + _Alignas(8) char buf_[4096]; + _Alignas(8) char *buf = buf_; size_t i; memset(buf, 0, sizeof(buf_)); @@ -76,6 +83,10 @@ main(void) assert(libsimple_mempsetelem(buf, &(uint64_t){0x0102030450607080ULL}, 8, 100) == &buf[800]); assert(libsimple_mempsetelem(buf, (char []){(char)0xA0, (char)0xB0, (char)0xC0}, 3, 16) == &buf[48]); +#if defined(__clang__) +# pragma clang diagnostic ignored "-Wcast-align" +#endif + for (i = 0; i < 48; i++) assert(buf[i] == ((char []){(char)0xA0, (char)0xB0, (char)0xC0})[i % 3]); for (; i < 800; i += 8) |