117 lines
3.0 KiB
C
117 lines
3.0 KiB
C
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/*
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* Copyright (c) 1995, 1996, 1997 Kungliga Tekniska H<EFBFBD>gskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Kungliga Tekniska
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* H<EFBFBD>gskolan and its contributors.
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*
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* 4. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "krb_locl.h"
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RCSID("$Id: k_concat.c,v 1.5 1997/05/02 08:56:39 joda Exp $");
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int
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k_concat (char *s, size_t len, ...)
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{
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int ret;
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va_list args;
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va_start(args, len);
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ret = k_vconcat (s, len, args);
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va_end(args);
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return ret;
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}
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int
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k_vconcat (char *s, size_t len, va_list args)
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{
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const char *a;
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while ((a = va_arg(args, const char*))) {
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size_t n = strlen (a);
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if (n >= len)
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return -1;
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strncpy (s, a, n);
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s += n;
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len -= n;
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}
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*s = '\0';
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return 0;
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}
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size_t
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k_vmconcat (char **s, size_t max_len, va_list args)
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{
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const char *a;
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char *p, *q;
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size_t len = 0;
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*s = NULL;
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p = malloc(1);
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if(p == NULL)
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return 0;
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*p = 0;
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len = 1;
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while ((a = va_arg(args, const char*))) {
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size_t n = strlen (a);
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if(max_len && len + n > max_len){
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free(p);
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return 0;
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}
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q = realloc(p, len + n);
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if(q == NULL){
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free(p);
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return 0;
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}
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p = q;
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len += n;
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strcat(p, a);
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}
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*s = p;
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return len;
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}
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size_t
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k_mconcat (char **s, size_t max_len, ...)
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{
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int ret;
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va_list args;
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va_start(args, max_len);
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ret = k_vmconcat (s, max_len, args);
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va_end(args);
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return ret;
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}
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