| | 1 | /*- |
| | 2 | * Copyright (c) 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 | * Paul Borman at Krystal Technologies. |
| | 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 | |
| | 37 | #include <sys/cdefs.h> |
| | 38 | __FBSDID("$FreeBSD: src/lib/libc/locale/wcstombs.c,v 1.5 2002/10/27 10:41:21 tjr Exp $"); |
| | 39 | |
| | 40 | #include <errno.h> |
| | 41 | #include <stdlib.h> |
| | 42 | #include <limits.h> |
| | 43 | #include <stddef.h> |
| | 44 | #include <rune.h> |
| | 45 | |
| | 46 | size_t |
| | 47 | wcstombs(char * __restrict s, const wchar_t * __restrict pwcs, size_t n) |
| | 48 | { |
| | 49 | char buf[MB_LEN_MAX]; |
| | 50 | char *e; |
| | 51 | int cnt, nb; |
| | 52 | |
| | 53 | if (pwcs == NULL || n > INT_MAX) { |
| | 54 | errno = EINVAL; |
| | 55 | return (-1); |
| | 56 | } |
| | 57 | |
| | 58 | cnt = 0; |
| | 59 | |
| | 60 | if (s == NULL) { |
| | 61 | /* Convert and count only, do not store. */ |
| | 62 | while (*pwcs != L'\0') { |
| | 63 | if (sputrune(*pwcs++, buf, MB_LEN_MAX, &e) == 0) { |
| | 64 | errno = EILSEQ; |
| | 65 | return (-1); |
| | 66 | } |
| | 67 | cnt += e - buf; |
| | 68 | } |
| | 69 | return (cnt); |
| | 70 | } |
| | 71 | |
| | 72 | /* Convert, store and count characters. */ |
| | 73 | nb = n; |
| | 74 | while (nb > 0) { |
| | 75 | if (*pwcs == L'\0') { |
| | 76 | *s = '\0'; |
| | 77 | break; |
| | 78 | } |
| | 79 | if (sputrune(*pwcs++, s, nb, &e) == 0) { |
| | 80 | errno = EILSEQ; |
| | 81 | return (-1); |
| | 82 | } |
| | 83 | if (e == NULL) /* too long */ |
| | 84 | return (cnt); |
| | 85 | cnt += e - s; |
| | 86 | nb -= e - s; |
| | 87 | s = e; |
| | 88 | } |
| | 89 | |
| | 90 | return (cnt); |
| | 91 | } |
projects / apple / libc.git / blame_incremental