ack/lang/cem/libcc.ansi/core/string/strncat.c
David Given d1cdb07719 Realise that the libc core can safely call other libc core functions, even if
they're not defined in the core: so putw() can call stdio stuff, for example.
So the earlier concept of pureness isn't necessary. Rename accordingly.
2018-06-21 23:24:23 +02:00

30 lines
466 B
C

/*
* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
* See the copyright notice in the ACK home directory, in the file "Copyright".
*/
/* $Id$ */
#include <string.h>
char* strncat(char* ret, register const char* s2, size_t n)
{
register char* s1 = ret;
if (n > 0)
{
while (*s1++)
/* EMPTY */;
s1--;
while (*s1++ = *s2++)
{
if (--n > 0)
continue;
*s1 = '\0';
break;
}
return ret;
}
else
return s1;
}