2 * Copyright (c) 2003-2004 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 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "archive_platform.h"
28 __FBSDID("$FreeBSD: src/lib/libarchive/archive_string_sprintf.c,v 1.7 2005/01/16 22:13:51 kientzle Exp $");
31 * The use of printf()-family functions can be troublesome
32 * for space-constrained applications. In addition, correctly
33 * implementing this function in terms of vsnprintf() requires
34 * two calls (one to determine the size, another to format the
35 * result), which in turn requires duplicating the argument list
36 * using va_copy, which isn't yet universally available.
38 * So, I've implemented a bare minimum of printf()-like capability
39 * here. This is only used to format error messages, so doesn't
40 * require any floating-point support or field-width handling.
45 #include "archive_string.h"
48 * Like 'vsprintf', but ensures the target is big enough, resizing if
52 __archive_string_vsprintf(struct archive_string
*as
, const char *fmt
,
56 intmax_t s
; /* Signed integer temp. */
57 uintmax_t u
; /* Unsigned integer temp. */
60 __archive_string_ensure(as
, 64);
68 for (p
= fmt
; *p
!= '\0'; p
++) {
69 const char *saved_p
= p
;
72 archive_strappend_char(as
, *p
);
91 __archive_strappend_char(as
, '%');
95 __archive_strappend_char(as
, s
);
99 case 'j': s
= va_arg(ap
, intmax_t); break;
100 case 'l': s
= va_arg(ap
, long); break;
101 default: s
= va_arg(ap
, int); break;
103 archive_strappend_int(as
, s
, 10);
106 p2
= va_arg(ap
, char *);
107 archive_strcat(as
, p2
);
109 case 'o': case 'u': case 'x': case 'X':
110 /* Common handling for unsigned integer formats. */
112 case 'j': u
= va_arg(ap
, uintmax_t); break;
113 case 'l': u
= va_arg(ap
, unsigned long); break;
114 default: u
= va_arg(ap
, unsigned int); break;
116 /* Format it in the correct base. */
118 case 'o': archive_strappend_int(as
, u
, 8); break;
119 case 'u': archive_strappend_int(as
, u
, 10); break;
120 default: archive_strappend_int(as
, u
, 16); break;
124 /* Rewind and print the initial '%' literally. */
126 archive_strappend_char(as
, *p
);