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 --- strrnchr.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 strrnchr.c (limited to 'strrnchr.c') diff --git a/strrnchr.c b/strrnchr.c new file mode 100644 index 0000000..d67775e --- /dev/null +++ b/strrnchr.c @@ -0,0 +1,47 @@ +/* See LICENSE file for copyright and license details. */ +#include "libsimple.h" +#ifndef TEST + + +char * +libsimple_strrnchr(const char *s_, int c_, size_t n) +{ + char *s = *(char **)(void *)&s_, c = (char)c_; + char *end = &s[n], *r = NULL; + for (; s != end; s++) { + if (*s == c) + r = s; + if (!*s) + break; + } + return r; +} + + +#else +#include "test.h" + +int +main(void) +{ + assert(!strcmpnul(libsimple_strrnchr("abcABCabcABC", 'a', 13), "abcABC")); + assert(!strcmpnul(libsimple_strrnchr("abcABCabcABC", 'c', 13), "cABC")); + assert(!strcmpnul(libsimple_strrnchr("abcABCabcABC", 'A', 13), "ABC")); + assert(!strcmpnul(libsimple_strrnchr("abcABCabcABC", 'C', 13), "C")); + assert(!strcmpnul(libsimple_strrnchr("ABCabcABCabc", 'a', 13), "abc")); + assert(!strcmpnul(libsimple_strrnchr("ABCabcABCabc", 'c', 13), "c")); + assert(!strcmpnul(libsimple_strrnchr("ABCabcABCabc", 'A', 13), "ABCabc")); + assert(!strcmpnul(libsimple_strrnchr("ABCabcABCabc", 'C', 13), "Cabc")); + assert(!libsimple_strrnchr("abcABCabcABC", 'x', 13)); + assert(!libsimple_strrnchr("abcABCabcABC", 'x', 20)); + assert(!strcmpnul(libsimple_strrnchr("abcABCabcABC", '\0', 13), "")); + assert(!strcmpnul(libsimple_strrnchr("abcABCabcABC", '\0', 20), "")); + assert(!libsimple_strrnchr("abcABCabcABC", '\0', 3)); + assert(!libsimple_strrnchr("abcdef", 'd', 3)); + assert(!libsimple_strrnchr("abcdef", 'e', 3)); + assert(!strcmpnul(libsimple_strrnchr("123123", '1', 7), "123")); + assert(!strcmpnul(libsimple_strrnchr("123123", '3', 7), "3")); + return 0; +} + +#endif -- cgit v1.2.3-70-g09d2