| | 1 | /*- |
| | 2 | * Copyright (c) 1990, 1993 |
| | 3 | * The Regents of the University of California. All rights reserved. |
| | 4 | * |
| | 5 | * This code is derived from software contributed to Berkeley by |
| | 6 | * Chris Torek. |
| | 7 | * |
| | 8 | * Redistribution and use in source and binary forms, with or without |
| | 9 | * modification, are permitted provided that the following conditions |
| | 10 | * are met: |
| | 11 | * 1. Redistributions of source code must retain the above copyright |
| | 12 | * notice, this list of conditions and the following disclaimer. |
| | 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 14 | * notice, this list of conditions and the following disclaimer in the |
| | 15 | * documentation and/or other materials provided with the distribution. |
| | 16 | * 3. All advertising materials mentioning features or use of this software |
| | 17 | * must display the following acknowledgement: |
| | 18 | * This product includes software developed by the University of |
| | 19 | * California, Berkeley and its contributors. |
| | 20 | * 4. Neither the name of the University nor the names of its contributors |
| | 21 | * may be used to endorse or promote products derived from this software |
| | 22 | * without specific prior written permission. |
| | 23 | * |
| | 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| | 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| | 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| | 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| | 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| | 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| | 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| | 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| | 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| | 34 | * SUCH DAMAGE. |
| | 35 | * |
| | 36 | * @(#)vsnprintf.c 8.1 (Berkeley) 6/4/93 |
| | 37 | * $FreeBSD: src/lib/libc/stdio/vsnprintf.c,v 1.12.2.1 2002/09/23 06:58:17 maxim Exp $ |
| | 38 | * $DragonFly: src/lib/libc/stdio/vsnprintf.c,v 1.7 2005/07/23 23:14:44 joerg Exp $ |
| | 39 | */ |
| | 40 | |
| | 41 | #include <limits.h> |
| | 42 | #include <stdio.h> |
| | 43 | #include <stdarg.h> |
| | 44 | |
| | 45 | #include "local.h" |
| | 46 | #include "priv_stdio.h" |
| | 47 | |
| | 48 | int |
| | 49 | vsnprintf(char *str, size_t n, const char *fmt, va_list ap) |
| | 50 | { |
| | 51 | size_t on; |
| | 52 | int ret; |
| | 53 | char dummy; |
| | 54 | FILE f; |
| | 55 | |
| | 56 | on = n; |
| | 57 | if (n != 0) |
| | 58 | n--; |
| | 59 | if (n > INT_MAX) |
| | 60 | n = INT_MAX; |
| | 61 | /* Stdio internals do not deal correctly with zero length buffer */ |
| | 62 | if (n == 0) { |
| | 63 | str = &dummy; |
| | 64 | n = 1; |
| | 65 | } |
| | 66 | f.pub._fileno = -1; |
| | 67 | f.pub._flags = __SWR | __SSTR; |
| | 68 | f._bf._base = f.pub._p = (unsigned char *)str; |
| | 69 | f._bf._size = f.pub._w = n; |
| | 70 | f._up = NULL; |
| | 71 | f.fl_mutex = PTHREAD_MUTEX_INITIALIZER; |
| | 72 | f.fl_owner = NULL; |
| | 73 | f.fl_count = 0; |
| | 74 | ret = __vfprintf(&f, fmt, ap); |
| | 75 | if (on > 0) |
| | 76 | *f.pub._p = '\0'; |
| | 77 | return (ret); |
| | 78 | } |
projects / dragonfly.git / blame_incremental