65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
/* strncat( char *, const char *, 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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char * strncat( char * s1, const char * s2, size_t n )
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{
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char * rc = s1;
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while ( *s1 )
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{
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++s1;
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}
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while ( n && ( *s1++ = *s2++ ) )
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{
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--n;
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}
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if ( n == 0 )
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{
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*s1 = '\0';
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}
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return rc;
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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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char s[] = "xx\0xxxxxx";
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TESTCASE( strncat( s, abcde, 10 ) == s );
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TESTCASE( s[2] == 'a' );
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TESTCASE( s[6] == 'e' );
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TESTCASE( s[7] == '\0' );
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TESTCASE( s[8] == 'x' );
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s[0] = '\0';
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TESTCASE( strncat( s, abcdx, 10 ) == s );
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TESTCASE( s[4] == 'x' );
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TESTCASE( s[5] == '\0' );
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TESTCASE( strncat( s, "\0", 10 ) == s );
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TESTCASE( s[5] == '\0' );
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TESTCASE( s[6] == 'e' );
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TESTCASE( strncat( s, abcde, 0 ) == s );
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TESTCASE( s[5] == '\0' );
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TESTCASE( s[6] == 'e' );
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TESTCASE( strncat( s, abcde, 3 ) == s );
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TESTCASE( s[5] == 'a' );
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TESTCASE( s[7] == 'c' );
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TESTCASE( s[8] == '\0' );
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return TEST_RESULTS;
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}
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#endif
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