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_sprintf.c,v 1.9 2007/07/15 19:13:59 kientzle Exp $");
30 * The use of printf()-family functions can be troublesome
31 * for space-constrained applications. In addition, correctly
32 * implementing this function in terms of vsnprintf() requires
33 * two calls (one to determine the size, another to format the
34 * result), which in turn requires duplicating the argument list
35 * using va_copy, which isn't yet universally available.
37 * So, I've implemented a bare minimum of printf()-like capability
38 * here. This is only used to format error messages, so doesn't
39 * require any floating-point support or field-width handling.
44 #include "archive_string.h"
45 #include "archive_private.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 if (__archive_string_ensure(as
, 64) == NULL
)
61 __archive_errx(1, "Out of memory");
69 for (p
= fmt
; *p
!= '\0'; p
++) {
70 const char *saved_p
= p
;
73 archive_strappend_char(as
, *p
);
92 __archive_strappend_char(as
, '%');
96 __archive_strappend_char(as
, s
);
100 case 'j': s
= va_arg(ap
, intmax_t); break;
101 case 'l': s
= va_arg(ap
, long); break;
102 default: s
= va_arg(ap
, int); break;
104 archive_strappend_int(as
, s
, 10);
107 p2
= va_arg(ap
, char *);
108 archive_strcat(as
, p2
);
110 case 'o': case 'u': case 'x': case 'X':
111 /* Common handling for unsigned integer formats. */
113 case 'j': u
= va_arg(ap
, uintmax_t); break;
114 case 'l': u
= va_arg(ap
, unsigned long); break;
115 default: u
= va_arg(ap
, unsigned int); break;
117 /* Format it in the correct base. */
119 case 'o': archive_strappend_int(as
, u
, 8); break;
120 case 'u': archive_strappend_int(as
, u
, 10); break;
121 default: archive_strappend_int(as
, u
, 16); break;
125 /* Rewind and print the initial '%' literally. */
127 archive_strappend_char(as
, *p
);