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/*-
* Copyright (c) 2003-2004 Tim Kientzle
* 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
* in this position and unchanged.
* 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(S) ``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(S) 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 "archive_platform.h"
__FBSDID("$FreeBSD$");
/*
* Basic resizable string support, to simplify manipulating arbitrary-sized
* strings while minimizing heap activity.
*/
#include <stdlib.h>
#include <string.h>
#include "archive_private.h"
#include "archive_string.h"
struct archive_string *
__archive_string_append(struct archive_string *as, const char *p, size_t s)
{
__archive_string_ensure(as, as->length + s + 1);
memcpy(as->s + as->length, p, s);
as->s[as->length + s] = 0;
as->length += s;
return (as);
}
void
__archive_string_free(struct archive_string *as)
{
as->length = 0;
as->buffer_length = 0;
if (as->s != NULL)
free(as->s);
}
struct archive_string *
__archive_string_ensure(struct archive_string *as, size_t s)
{
if (as->s && (s <= as->buffer_length))
return (as);
if (as->buffer_length < 32)
as->buffer_length = 32;
while (as->buffer_length < s)
as->buffer_length *= 2;
as->s = realloc(as->s, as->buffer_length);
/* TODO: Return null instead and fix up all of our callers to
* handle this correctly. */
if (as->s == NULL)
__archive_errx(1, "Out of memory");
return (as);
}
struct archive_string *
__archive_strncat(struct archive_string *as, const char *p, size_t n)
{
size_t s;
const char *pp;
/* Like strlen(p), except won't examine positions beyond p[n]. */
s = 0;
pp = p;
while (*pp && s < n) {
pp++;
s++;
}
return (__archive_string_append(as, p, s));
}
struct archive_string *
__archive_strappend_char(struct archive_string *as, char c)
{
return (__archive_string_append(as, &c, 1));
}
struct archive_string *
__archive_strappend_int(struct archive_string *as, int d, int base)
{
static const char *digits = "0123457890abcdef";
if (d < 0) {
__archive_strappend_char(as, '-');
d = -d;
}
if (d >= base)
__archive_strappend_int(as, d/base, base);
__archive_strappend_char(as, digits[d % base]);
return (as);
}
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