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Diffstat (limited to '')
| -rw-r--r-- | memrcaseeqlen.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/memrcaseeqlen.c b/memrcaseeqlen.c new file mode 100644 index 0000000..3f586b7 --- /dev/null +++ b/memrcaseeqlen.c @@ -0,0 +1,41 @@ +/* See LICENSE file for copyright and license details. */ +#include "libsimple.h" +#ifndef TEST + + +size_t +libsimple_memrcaseeqlen(const void *a_, size_t n, const void *b_, size_t m) +{ + const char *a = &((char *)a_)[n], *b = &((char *)b_)[m]; + size_t i = 0, len = n < m ? n : m; + for (; i < len && (--a, --b, tolower(*a) == tolower(*b)); i++); + return i; +} + + +#else +#include "test.h" + +int +main(void) +{ + char s[] = "abcdefgh", t[] = "ABCDEFGH"; + size_t i, j; + assert(libsimple_memrcaseeqlen("x", 0, "x", 0) == 0); + assert(libsimple_memrcaseeqlen("x", 1, "x", 0) == 0); + assert(libsimple_memrcaseeqlen("x", 1, "y", 1) == 0); + assert(libsimple_memrcaseeqlen("y", 0, "y", 1) == 0); + for (i = 0; i <= 8; i++) { + for (j = 0; j <= 8; j++) { + assert(libsimple_memrcaseeqlen(&s[i], 8 - i, &t[j], 8 - j) == 8 - (i > j ? i : j)); + assert(libsimple_memrcaseeqlen(s, i, t, j) == (i == j ? i : 0)); + assert(libsimple_memrcaseeqlen(&t[i], 8 - i, &s[j], 8 - j) == 8 - (i > j ? i : j)); + assert(libsimple_memrcaseeqlen(t, i, s, j) == (i == j ? i : 0)); + } + } + assert(libsimple_memrcaseeqlen("abc", 3, "abc", 3) == 3); + assert(libsimple_memrcaseeqlen("123", 3, "123", 3) == 3); + return 0; +} + +#endif |