1 /* $NetBSD: strxfrm.c,v 1.13 2013/04/19 23:28:47 joerg 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 35 #include <sys/cdefs.h> 36 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)strxfrm.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 __RCSID("$NetBSD: strxfrm.c,v 1.13 2013/04/19 23:28:47 joerg Exp $"); 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include "namespace.h" 45 46 #include <assert.h> 47 #include <locale.h> 48 #include <string.h> 49 #include "setlocale_local.h" 50 51 __weak_alias(strxfrm_l, _strxfrm_l) 52 53 /* 54 * Transform src, storing the result in dst, such that 55 * strcmp() on transformed strings returns what strcoll() 56 * on the original untransformed strings would return. 57 */ 58 size_t 59 strxfrm_l(char *dst, const char *src, size_t n, locale_t loc) 60 { 61 size_t srclen, copysize; 62 63 _DIAGASSERT(src != NULL); 64 65 if (loc == NULL) 66 loc = _C_locale; 67 /* XXX: LC_COLLATE should be implemented. */ 68 /* LINTED */(void)loc; 69 70 /* 71 * Since locales are unimplemented, this is just a copy. 72 */ 73 srclen = strlen(src); 74 if (n != 0) { 75 _DIAGASSERT(dst != NULL); 76 copysize = srclen < n ? srclen : n - 1; 77 (void)memcpy(dst, src, copysize); 78 dst[copysize] = 0; 79 } 80 return (srclen); 81 } 82 83 size_t 84 strxfrm(char *dst, const char *src, size_t n) 85 { 86 return strxfrm_l(dst, src, n, *_current_locale()); 87 } 88