From d69fd77060515537f9b6cba0daa12c1155b2c02f Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Mon, 22 Oct 2018 15:52:32 +0200 Subject: Add strn{,case}chr{,nul}, strnend, and strrn{,case}chr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- strnchr.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 strnchr.c (limited to 'strnchr.c') diff --git a/strnchr.c b/strnchr.c new file mode 100644 index 0000000..e03df86 --- /dev/null +++ b/strnchr.c @@ -0,0 +1,42 @@ +/* See LICENSE file for copyright and license details. */ +#include "libsimple.h" +#ifndef TEST + + +char * +libsimple_strnchr(const char *s_, int c_, size_t n) +{ + char *s = *(char **)(void *)&s_, c = (char)c_; + char *end = &s[n]; + for (; s != end && *s && *s != c; s++); + return s == end ? NULL : *s == c ? s : NULL; +} + + +#else +#include "test.h" + +int +main(void) +{ + assert(!strcmpnul(libsimple_strnchr("abcABCabcABC", 'a', 13), "abcABCabcABC")); + assert(!strcmpnul(libsimple_strnchr("abcABCabcABC", 'c', 13), "cABCabcABC")); + assert(!strcmpnul(libsimple_strnchr("abcABCabcABC", 'A', 13), "ABCabcABC")); + assert(!strcmpnul(libsimple_strnchr("abcABCabcABC", 'C', 13), "CabcABC")); + assert(!strcmpnul(libsimple_strnchr("ABCabcABCabc", 'a', 13), "abcABCabc")); + assert(!strcmpnul(libsimple_strnchr("ABCabcABCabc", 'c', 13), "cABCabc")); + assert(!strcmpnul(libsimple_strnchr("ABCabcABCabc", 'A', 13), "ABCabcABCabc")); + assert(!strcmpnul(libsimple_strnchr("ABCabcABCabc", 'C', 13), "CabcABCabc")); + assert(!libsimple_strnchr("abcABCabcABC", 'x', 13)); + assert(!libsimple_strnchr("abcABCabcABC", 'x', 20)); + assert(!strcmpnul(libsimple_strnchr("abcABCabcABC", '\0', 13), "")); + assert(!strcmpnul(libsimple_strnchr("abcABCabcABC", '\0', 20), "")); + assert(!libsimple_strnchr("abcABCabcABC", '\0', 3)); + assert(!libsimple_strnchr("abcdef", 'd', 3)); + assert(!libsimple_strnchr("abcdef", 'e', 3)); + assert(!strcmpnul(libsimple_strnchr("123123", '1', 7), "123123")); + assert(!strcmpnul(libsimple_strnchr("123123", '3', 7), "3123")); + return 0; +} + +#endif -- cgit v1.2.3-70-g09d2