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2aa62f2b | 1 | /* $NetBSD: vsnprintf.c,v 1.20 2005/02/09 21:35:47 kleink Exp $ */\r |
2 | \r | |
3 | /*-\r | |
4 | * Copyright (c) 1990, 1993\r | |
5 | * The Regents of the University of California. All rights reserved.\r | |
6 | *\r | |
7 | * This code is derived from software contributed to Berkeley by\r | |
8 | * Chris Torek.\r | |
9 | *\r | |
10 | * Redistribution and use in source and binary forms, with or without\r | |
11 | * modification, are permitted provided that the following conditions\r | |
12 | * are met:\r | |
13 | * 1. Redistributions of source code must retain the above copyright\r | |
14 | * notice, this list of conditions and the following disclaimer.\r | |
15 | * 2. Redistributions in binary form must reproduce the above copyright\r | |
16 | * notice, this list of conditions and the following disclaimer in the\r | |
17 | * documentation and/or other materials provided with the distribution.\r | |
18 | * 3. Neither the name of the University nor the names of its contributors\r | |
19 | * may be used to endorse or promote products derived from this software\r | |
20 | * without specific prior written permission.\r | |
21 | *\r | |
22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r | |
23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r | |
24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r | |
25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r | |
26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r | |
27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r | |
28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r | |
29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r | |
30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r | |
31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r | |
32 | * SUCH DAMAGE.\r | |
33 | */\r | |
34 | #include <LibConfig.h>\r | |
35 | #include <sys/EfiCdefs.h>\r | |
36 | #if defined(LIBC_SCCS) && !defined(lint)\r | |
37 | #if 0\r | |
38 | static char sccsid[] = "@(#)vsnprintf.c 8.1 (Berkeley) 6/4/93";\r | |
39 | #else\r | |
40 | __RCSID("$NetBSD: vsnprintf.c,v 1.20 2005/02/09 21:35:47 kleink Exp $");\r | |
41 | #endif\r | |
42 | #endif /* LIBC_SCCS and not lint */\r | |
43 | \r | |
44 | #include "namespace.h"\r | |
45 | \r | |
46 | #include <assert.h>\r | |
47 | #include <errno.h>\r | |
48 | #include <stdio.h>\r | |
49 | #include "reentrant.h"\r | |
50 | #include "local.h"\r | |
51 | \r | |
52 | #ifdef __weak_alias\r | |
53 | __weak_alias(vsnprintf,_vsnprintf)\r | |
54 | #endif\r | |
55 | \r | |
56 | int\r | |
d7ce7006 | 57 | vsnprintf(char *str, size_t n, const char *fmt, va_list ap)\r |
2aa62f2b | 58 | {\r |
59 | int ret;\r | |
60 | FILE f;\r | |
61 | struct __sfileext fext;\r | |
62 | unsigned char dummy[1];\r | |
63 | \r | |
64 | _DIAGASSERT(n == 0 || str != NULL);\r | |
65 | _DIAGASSERT(fmt != NULL);\r | |
66 | \r | |
67 | if ((int)n < 0) {\r | |
68 | errno = EINVAL;\r | |
69 | return (-1);\r | |
70 | }\r | |
71 | \r | |
72 | _FILEEXT_SETUP(&f, &fext);\r | |
73 | f._file = -1;\r | |
74 | f._flags = __SWR | __SSTR;\r | |
75 | if (n == 0) {\r | |
76 | f._bf._base = f._p = dummy;\r | |
77 | f._bf._size = f._w = 0;\r | |
78 | } else {\r | |
79 | f._bf._base = f._p = (unsigned char *)str;\r | |
53e1e5c6 | 80 | f._bf._size = f._w = (int)(n - 1);\r |
2aa62f2b | 81 | }\r |
82 | ret = __vfprintf_unlocked(&f, fmt, ap);\r | |
83 | *f._p = 0;\r | |
84 | return (ret);\r | |
85 | }\r |