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 1.8 2007/01/09 08:05:55 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"
47 * Like 'vsprintf', but ensures the target is big enough, resizing if
51 __archive_string_vsprintf(struct archive_string *as, const char *fmt,
55 intmax_t s; /* Signed integer temp. */
56 uintmax_t u; /* Unsigned integer temp. */
59 __archive_string_ensure(as, 64);
67 for (p = fmt; *p != '\0'; p++) {
68 const char *saved_p = p;
71 archive_strappend_char(as, *p);
90 __archive_strappend_char(as, '%');
94 __archive_strappend_char(as, s);
98 case 'j': s = va_arg(ap, intmax_t); break;
99 case 'l': s = va_arg(ap, long); break;
100 default: s = va_arg(ap, int); break;
102 archive_strappend_int(as, s, 10);
105 p2 = va_arg(ap, char *);
106 archive_strcat(as, p2);
108 case 'o': case 'u': case 'x': case 'X':
109 /* Common handling for unsigned integer formats. */
111 case 'j': u = va_arg(ap, uintmax_t); break;
112 case 'l': u = va_arg(ap, unsigned long); break;
113 default: u = va_arg(ap, unsigned int); break;
115 /* Format it in the correct base. */
117 case 'o': archive_strappend_int(as, u, 8); break;
118 case 'u': archive_strappend_int(as, u, 10); break;
119 default: archive_strappend_int(as, u, 16); break;
123 /* Rewind and print the initial '%' literally. */
125 archive_strappend_char(as, *p);