strlcat.c

Go to the documentation of this file.

/* @(#)strlcat.c    1.1 10/04/26 Copyright 2010 J. Schilling */
#include <schily/mconfig.h>
#ifndef lint
static  UConst char sccsid[] =
    "@(#)strlcat.c  1.1 10/04/26 Copyright 2010 J. Schilling";
#endif
/*
 *  strlcat() to be used if missing in libc
 *
 *  Copyright (c) 2010 J. Schilling
 */
/*
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * See the file CDDL.Schily.txt in this distribution for details.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file CDDL.Schily.txt from this distribution.
 */
 
#include <schily/standard.h>
#include <schily/unistd.h>
#include <schily/string.h>
#include <schily/libport.h>
 
#ifndef HAVE_STRLCAT
 
EXPORT size_t
strlcat(s1, s2, len)
    register char       *s1;
    register const char *s2;
    register size_t     len;
{
    const char      *os1    = s1;
        size_t      olen    = len;
 
    if (len > 0) {
        while (--len > 0 && *s1++ != '\0')
            ;
 
        if (len == 0)
            return (olen + strlen(s2));
 
        s1--;
        len++;
        while (--len > 0 && (*s1++ = *s2++) != '\0')
            ;
        if (len == 0) {
            *s1 = '\0';
            return (s1 - os1 + strlen(s2));
        }
        return (--s1 - os1);
    }
    return (strlen(s2));
}
#endif  /* HAVE_STRLCAT */