1 /** @file 2 3 Copyright (c) 2011, Intel Corporation. All rights reserved.<BR> 4 This program and the accompanying materials are licensed and made available under 5 the terms and conditions of the BSD License that accompanies this distribution. 6 The full text of the license may be found at 7 http://opensource.org/licenses/bsd-license. 8 9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 11 12 * Copyright (c) 1997, 2002 The NetBSD Foundation, Inc. 13 * All rights reserved. 14 * 15 * This code is derived from software contributed to The NetBSD Foundation 16 * by Klaus Klein and Jason R. Thorpe. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 39 NetBSD: dirname.c,v 1.10 2008/05/10 22:39:40 christos Exp 40 */ 41 #include <LibConfig.h> 42 #include <sys/cdefs.h> 43 44 #include <limits.h> 45 #include <ctype.h> 46 #include <string.h> 47 48 #ifdef __weak_alias 49 __weak_alias(dirname,_dirname) 50 #endif 51 52 #ifdef HAVE_DIRNAME 53 char * 54 dirname(char *path) 55 { 56 static char singledot[] = "."; 57 static char result[PATH_MAX]; 58 const char *lastp; 59 size_t len; 60 61 /* 62 * If `path' is a null pointer or points to an empty string, 63 * return a pointer to the string ".". 64 */ 65 if ((path == NULL) || (*path == '\0')) 66 return (singledot); 67 68 /* Strip trailing slashes, if any. */ 69 lastp = path + strlen(path) - 1; 70 while (lastp != path && isDirSep(*lastp)) 71 lastp--; 72 73 /* Terminate path at the last occurence of '/'. */ 74 do { 75 if (isDirSep(*lastp)) { 76 /* Strip trailing slashes, if any. */ 77 while (lastp != path && isDirSep(*lastp)) 78 lastp--; 79 80 /* ...and copy the result into the result buffer. 81 We make sure that there will be room for the terminating NUL 82 and for a final '/', if necessary. 83 */ 84 len = (lastp - path) + 1 /* last char */; 85 if (len > (PATH_MAX - 2)) 86 len = PATH_MAX - 2; 87 88 memcpy(result, path, len); 89 if(*lastp == ':') { /* Have we stripped off all except the Volume name? */ 90 if(isDirSep(lastp[1])) { /* Was ...":/"... so we want the root of the volume. */ 91 result[len++] = '/'; 92 } 93 else { 94 result[len++] = '.'; 95 } 96 } 97 result[len] = '\0'; 98 return (result); 99 } 100 } while (--lastp >= path); 101 102 /* No /'s found, return a pointer to the string ".". */ 103 return (singledot); 104 } 105 #endif 106
