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/*
* Copyright (c) 1994 Christos Zoulas
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christos Zoulas.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char *rcsid = "$Id: str.c,v 1.2 2004/08/01 18:32:20 deraadt Exp $";
#endif
/*
* Counted strings
*/
#include <stdlib.h>
#include <string.h>
#include "util.h"
#include "str.h"
/*
* str_init(): Initialize string
*/
void
str_init(struct string *s)
{
s->s_str = NULL;
s->s_len = 0;
}
/*
* str_append(): Append string allocating buffer as necessary
*/
void
str_append(struct string *buf, const char *str, int del)
{
size_t len = strlen(str) + 1;
if (buf->s_str == NULL)
buf->s_str = emalloc(len);
else {
buf->s_str = erealloc(buf->s_str, buf->s_len + len +
(del ? 2 : 1));
if (del)
buf->s_str[buf->s_len++] = del;
}
memcpy(&buf->s_str[buf->s_len], str, len);
buf->s_len += len - 1;
}
/*
* str_prepend(): Prepend string allocating buffer as necessary
*/
void
str_prepend(struct string *buf, const char *str, int del)
{
char *ptr, *sptr;
size_t len = strlen(str) + 1;
sptr = ptr = emalloc(buf->s_len + len + (del ? 2 : 1));
if (del)
*ptr++ = del;
memcpy(ptr, str, len);
if (buf->s_str) {
memcpy(&ptr[len - 1], buf->s_str, buf->s_len + 1);
free(buf->s_str);
}
buf->s_str = sptr;
buf->s_len += del ? len : len - 1;
}
/*
* str_free(): Free a string
*/
void
str_free(struct string *s)
{
free(s->s_str);
s->s_str = NULL;
s->s_len = 0;
}
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