111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/* $NetBSD: str.c,v 1.7 2009/10/21 01:07:47 snj Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
__RCSID("$NetBSD: str.c,v 1.7 2009/10/21 01:07:47 snj Exp $");
|
|
#endif
|
|
|
|
/*
|
|
* Counted strings
|
|
*/
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <err.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;
|
|
}
|