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