41 lines
840 B
C
41 lines
840 B
C
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/* memchr( const void *, int, size_t )
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This file is part of the Public Domain C Library (PDCLib).
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Permission is granted to use, modify, and / or redistribute at will.
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*/
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#include <string.h>
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#ifndef REGTEST
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void * memchr( const void * s, int c, size_t n )
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{
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const unsigned char * p = (const unsigned char *) s;
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while ( n-- )
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{
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if ( *p == (unsigned char) c )
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{
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return (void *) p;
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}
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++p;
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}
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return NULL;
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}
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#endif
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#ifdef TEST
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#include "_PDCLIB_test.h"
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int main( void )
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{
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TESTCASE( memchr( abcde, 'c', 5 ) == &abcde[2] );
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TESTCASE( memchr( abcde, 'a', 1 ) == &abcde[0] );
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TESTCASE( memchr( abcde, 'a', 0 ) == NULL );
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TESTCASE( memchr( abcde, '\0', 5 ) == NULL );
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TESTCASE( memchr( abcde, '\0', 6 ) == &abcde[5] );
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return TEST_RESULTS;
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}
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#endif
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