2 * Copyright (c) 2003-2007 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "archive_platform.h"
27 __FBSDID("$FreeBSD: src/lib/libarchive/archive_string.c,v 1.9 2007/01/13 03:30:14 kientzle Exp $");
30 * Basic resizable string support, to simplify manipulating arbitrary-sized
31 * strings while minimizing heap activity.
41 #include "archive_private.h"
42 #include "archive_string.h"
44 struct archive_string
*
45 __archive_string_append(struct archive_string
*as
, const char *p
, size_t s
)
47 __archive_string_ensure(as
, as
->length
+ s
+ 1);
48 memcpy(as
->s
+ as
->length
, p
, s
);
49 as
->s
[as
->length
+ s
] = 0;
55 __archive_string_copy(struct archive_string
*dest
, struct archive_string
*src
)
57 __archive_string_ensure(dest
, src
->length
+ 1);
58 memcpy(dest
->s
, src
->s
, src
->length
);
59 dest
->length
= src
->length
;
60 dest
->s
[dest
->length
] = 0;
64 __archive_string_free(struct archive_string
*as
)
67 as
->buffer_length
= 0;
72 struct archive_string
*
73 __archive_string_ensure(struct archive_string
*as
, size_t s
)
75 if (as
->s
&& (s
<= as
->buffer_length
))
78 if (as
->buffer_length
< 32)
79 as
->buffer_length
= 32;
80 while (as
->buffer_length
< s
)
81 as
->buffer_length
*= 2;
82 as
->s
= (char *)realloc(as
->s
, as
->buffer_length
);
83 /* TODO: Return null instead and fix up all of our callers to
84 * handle this correctly. */
86 __archive_errx(1, "Out of memory");
90 struct archive_string
*
91 __archive_strncat(struct archive_string
*as
, const char *p
, size_t n
)
96 /* Like strlen(p), except won't examine positions beyond p[n]. */
99 while (*pp
&& s
< n
) {
103 return (__archive_string_append(as
, p
, s
));
106 struct archive_string
*
107 __archive_strappend_char(struct archive_string
*as
, char c
)
109 return (__archive_string_append(as
, &c
, 1));
112 struct archive_string
*
113 __archive_strappend_int(struct archive_string
*as
, int d
, int base
)
115 static const char *digits
= "0123456789abcdef";
118 __archive_strappend_char(as
, '-');
122 __archive_strappend_int(as
, d
/base
, base
);
123 __archive_strappend_char(as
, digits
[d
% base
]);