diff options
Diffstat (limited to '')
| -rw-r--r-- | memrelem_inv.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/memrelem_inv.c b/memrelem_inv.c new file mode 100644 index 0000000..5cadab1 --- /dev/null +++ b/memrelem_inv.c @@ -0,0 +1,76 @@ +/* See LICENSE file for copyright and license details. */ +#include "libsimple.h" +#ifndef TEST + + +void * +libsimple_memrelem_inv(const void *hay_, size_t hayn, const void *sub_, size_t subn) /* TODO test, man */ +{ + switch (subn) { + case 0: + return NULL; + case 1: + { + uint8_t *hay = (void *)hay_; + uint8_t sub = *(uint8_t *)sub_; + for (hay += hayn; hayn--;) + if (*--hay != sub) + return hay; + break; + } + case 2: + { + uint16_t *hay = (void *)hay_; + uint16_t sub = *(uint16_t *)sub_; + for (hay += hayn; hayn--;) + if (*--hay != sub) + return hay; + break; + } + case 4: + { + uint32_t *hay = (void *)hay_; + uint32_t sub = *(uint32_t *)sub_; + for (hay += hayn; hayn--;) + if (*--hay != sub) + return hay; + break; + } + case 8: + { + uint64_t *hay = (void *)hay_; + uint64_t sub = *(uint64_t *)sub_; + for (hay += hayn; hayn--;) + if (*--hay != sub) + return hay; + break; + } + default: + { + char *hay = (void *)hay_; + const char *sub = sub_; + size_t i; + for (hay += hayn * subn; hayn--;) { + hay -= subn; + for (i = 0; i < subn; i++) + if (hay[i] != sub[i]) + return hay; + } + break; + } + } + + return NULL; +} + + +#else +#include "test.h" + +int +main(void) +{ + return 0; +} + +#endif |