1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #include <libgen.h> 29 #include <errno.h> 30 #include <string.h> 31 #include <sys/param.h> 32 33 int 34 basename_r(const char* path, char* buffer, size_t bufflen) 35 { 36 const char *endp, *startp; 37 int len, result; 38 char temp[2]; 39 40 /* Empty or NULL string gets treated as "." */ 41 if (path == NULL || *path == '\0') { 42 startp = "."; 43 len = 1; 44 goto Exit; 45 } 46 47 /* Strip trailing slashes */ 48 endp = path + strlen(path) - 1; 49 while (endp > path && *endp == '/') 50 endp--; 51 52 /* All slashes becomes "/" */ 53 if (endp == path && *endp == '/') { 54 startp = "/"; 55 len = 1; 56 goto Exit; 57 } 58 59 /* Find the start of the base */ 60 startp = endp; 61 while (startp > path && *(startp - 1) != '/') 62 startp--; 63 64 len = endp - startp +1; 65 66 Exit: 67 result = len; 68 if (buffer == NULL) { 69 return result; 70 } 71 if (len > (int)bufflen-1) { 72 len = (int)bufflen-1; 73 result = -1; 74 errno = ERANGE; 75 } 76 77 if (len >= 0) { 78 memcpy( buffer, startp, len ); 79 buffer[len] = 0; 80 } 81 return result; 82 } 83
