1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 AT&T Intellectual Property * 5* and is licensed under the * 6* Common Public License, Version 1.0 * 7* by AT&T Intellectual Property * 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 33extern 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