1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 20 * * 21 ***********************************************************************/ 22 #pragma prototyped 23 /* 24 * basename(3) implementation 25 */ 26 27 #include <ast_std.h> 28 29 #if defined(__EXPORT__) 30 #define extern __EXPORT__ 31 #endif 32 33 extern char *basename(register char *pathname) 34 { 35 register char *first, *last; 36 for(first=last=pathname; *last; last++); 37 /* back over trailing '/' */ 38 if(last>first) 39 while(*--last=='/' && last > first); 40 if(last==first && *last=='/') 41 { 42 /* all '/' or "" */ 43 if(*first=='/') 44 if(*++last=='/') /* keep leading // */ 45 last++; 46 } 47 else 48 { 49 for(first=last++;first>pathname && *first!='/';first--); 50 if(*first=='/') 51 first++; 52 } 53 *last = 0; 54 return(first); 55 } 56