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Sprite 1984 - 1993
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strncat.c
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C/C++ Source or Header
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1989-03-22
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2KB
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64 lines
/*
* strncat.c --
*
* Source code for the "strncat" library routine.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/string/RCS/strncat.c,v 1.2 89/03/22 16:07:05 rab Exp $ SPRITE (Berkeley)";
#endif /* not lint */
#include <string.h>
/*
*----------------------------------------------------------------------
*
* strncat --
*
* Copy one string (src) onto the end of another (dst), with a
* limit on how many bytes to copy.
*
* Results:
* The return value is a pointer to the destination string, dst.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
char *
strncat(dst, src, numChars)
register char *src; /* Place from which to copy. */
char *dst; /* Destination string: *srcPtr gets added
* onto the end of this. */
register int numChars; /* Maximum number of chars to copy. */
{
register char *copy = dst;
if (numChars == 0) {
return dst;
}
do {
} while (*copy++ != 0);
copy -= 1;
do {
if ((*copy++ = *src++) == 0) {
return dst;
}
} while (--numChars > 0);
*copy = 0;
return dst;
}