1 /*- 2 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua> 3 * at Electronni Visti IA, Kiev, Ukraine. 4 * All rights reserved. 5 * 6 * Copyright (c) 2011 The FreeBSD Foundation 7 * All rights reserved. 8 * Portions of this software were developed by David Chisnall 9 * under sponsorship from the FreeBSD Foundation. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include <sys/cdefs.h> 34 #if 0 35 __FBSDID("FreeBSD: src/lib/libc/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp "); 36 #endif 37 __FBSDID("$FreeBSD$"); 38 39 #include <stdlib.h> 40 #include <string.h> 41 #include <wchar.h> 42 #include "collate.h" 43 44 static char *__mbsdup(const wchar_t *); 45 46 /* 47 * Placeholder wcsxfrm() implementation. See wcscoll.c for a description of 48 * the logic used. 49 */ 50 size_t 51 wcsxfrm_l(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len, locale_t locale) 52 { 53 int prim, sec, l; 54 size_t slen; 55 char *mbsrc, *s, *ss; 56 FIX_LOCALE(locale); 57 struct xlocale_collate *table = 58 (struct xlocale_collate*)locale->components[XLC_COLLATE]; 59 60 if (*src == L'\0') { 61 if (len != 0) 62 *dest = L'\0'; 63 return (0); 64 } 65 66 if (table->__collate_load_error || MB_CUR_MAX > 1) { 67 slen = wcslen(src); 68 if (len > 0) { 69 if (slen < len) 70 wcscpy(dest, src); 71 else { 72 wcsncpy(dest, src, len - 1); 73 dest[len - 1] = L'\0'; 74 } 75 } 76 return (slen); 77 } 78 79 mbsrc = __mbsdup(src); 80 slen = 0; 81 prim = sec = 0; 82 ss = s = __collate_substitute(table, mbsrc); 83 while (*s != '\0') { 84 while (*s != '\0' && prim == 0) { 85 __collate_lookup(table, s, &l, &prim, &sec); 86 s += l; 87 } 88 if (prim != 0) { 89 if (len > 1) { 90 *dest++ = (wchar_t)prim; 91 len--; 92 } 93 slen++; 94 prim = 0; 95 } 96 } 97 free(ss); 98 free(mbsrc); 99 if (len != 0) 100 *dest = L'\0'; 101 102 return (slen); 103 } 104 size_t 105 wcsxfrm(wchar_t * __restrict dest, const wchar_t * __restrict src, size_t len) 106 { 107 return wcsxfrm_l(dest, src, len, __get_locale()); 108 } 109 110 static char * 111 __mbsdup(const wchar_t *ws) 112 { 113 static const mbstate_t initial; 114 mbstate_t st; 115 const wchar_t *wcp; 116 size_t len; 117 char *mbs; 118 119 wcp = ws; 120 st = initial; 121 if ((len = wcsrtombs(NULL, &wcp, 0, &st)) == (size_t)-1) 122 return (NULL); 123 if ((mbs = malloc(len + 1)) == NULL) 124 return (NULL); 125 st = initial; 126 wcsrtombs(mbs, &ws, len + 1, &st); 127 128 return (mbs); 129 } 130