From c6ef89664b8c0d7aa85bddd5c7014aa6df82cbe7 Mon Sep 17 00:00:00 2001 From: tcsullivan Date: Sat, 17 Nov 2018 13:02:57 -0500 Subject: added pdclib, removed sash --- src/pdclib/functions/string/memchr.c | 41 ++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 src/pdclib/functions/string/memchr.c (limited to 'src/pdclib/functions/string/memchr.c') diff --git a/src/pdclib/functions/string/memchr.c b/src/pdclib/functions/string/memchr.c new file mode 100644 index 0000000..29598a7 --- /dev/null +++ b/src/pdclib/functions/string/memchr.c @@ -0,0 +1,41 @@ +/* memchr( const void *, int, size_t ) + + This file is part of the Public Domain C Library (PDCLib). + Permission is granted to use, modify, and / or redistribute at will. +*/ + +#include + +#ifndef REGTEST + +void * memchr( const void * s, int c, size_t n ) +{ + const unsigned char * p = (const unsigned char *) s; + while ( n-- ) + { + if ( *p == (unsigned char) c ) + { + return (void *) p; + } + ++p; + } + return NULL; +} + +#endif + +#ifdef TEST + +#include "_PDCLIB_test.h" + +int main( void ) +{ + TESTCASE( memchr( abcde, 'c', 5 ) == &abcde[2] ); + TESTCASE( memchr( abcde, 'a', 1 ) == &abcde[0] ); + TESTCASE( memchr( abcde, 'a', 0 ) == NULL ); + TESTCASE( memchr( abcde, '\0', 5 ) == NULL ); + TESTCASE( memchr( abcde, '\0', 6 ) == &abcde[5] ); + return TEST_RESULTS; +} + +#endif -- cgit v1.2.3