Category : C Source Code
Archive   : ECSTR.ZIP
Filename : STRXNCAT.C

Output of file : STRXNCAT.C contained in archive : ECSTR.ZIP
/* File : strxncat.c
Author : Richard A. O'Keefe.
Updated: 2 June 1984
Defines: strxncat()

strxncat(dst, len, src1, ..., srcn, NullS)
moves the first len bytes of the concatenation of dst,src1,...,srcn
to dst, terminating it with a NUL character unless len runs out, and
returns the original value of dst.
It is just like strcat except that it concatenates multiple sources.
Roughly, strxncat(d, L, s1, ..., sn) <=> strxncpy(d, L, d, s1, ..., sn).
Beware: the last argument should be the null character pointer.
Take VERY great care not to omit it! Also be careful to use NullS
and NOT to use 0, as on some machines 0 is not the same size as a
character pointer, or not the same bit pattern as NullS.

Note: strxncat is like strncat in that it will add at most one NUL,
and may in consequence move fewer than len characters. No so the
strxncpy and strxnmov routines, which resemble strncpy and strnmov.

#include "strings.h"

char *strxncat(va_alist)
va_list pvar;
register char *dst, *src;
register int len;
char *bogus;

dst = va_arg(pvar, char *);
bogus = dst;
len = va_arg(pvar, int);
while (*dst)
if (--len < 0) return bogus;
else dst++;
src = va_arg(pvar, char *);
while (src != NullS) {
do if (--len < 0) return bogus;
while (*dst++ = *src++);
src = va_arg(pvar, char *);
return bogus;

  3 Responses to “Category : C Source Code
Archive   : ECSTR.ZIP
Filename : STRXNCAT.C

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: