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