1N/A/***********************************************************************
1N/A* *
1N/A* This software is part of the ast package *
1N/A* Copyright (c) 1985-2011 AT&T Intellectual Property *
1N/A* and is licensed under the *
1N/A* Common Public License, Version 1.0 *
1N/A* by AT&T Intellectual Property *
1N/A* *
1N/A* A copy of the License is available at *
1N/A* http://www.opensource.org/licenses/cpl1.0.txt *
1N/A* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
1N/A* *
1N/A* Information and Software Systems Research *
1N/A* AT&T Research *
1N/A* Florham Park NJ *
1N/A* *
1N/A* Glenn Fowler <gsf@research.att.com> *
1N/A* David Korn <dgk@research.att.com> *
1N/A* Phong Vo <kpv@research.att.com> *
1N/A* *
1N/A***********************************************************************/
1N/A#pragma prototyped
1N/A/*
1N/A * dirname(3) implementation
1N/A */
1N/A
1N/A#include <ast_std.h>
1N/A
1N/A#if defined(__EXPORT__)
1N/A#define extern __EXPORT__
1N/A#endif
1N/A
1N/Aextern char *dirname(register char *pathname)
1N/A{
1N/A register char *last;
1N/A /* go to end of path */
1N/A for(last=pathname; *last; last++);
1N/A /* back over trailing '/' */
1N/A while(last>pathname && *--last=='/');
1N/A /* back over non-slash chars */
1N/A for(;last>pathname && *last!='/';last--);
1N/A if(last==pathname)
1N/A {
1N/A /* all '/' or "" */
1N/A if(*last!='/')
1N/A *last = '.';
1N/A /* preserve // */
1N/A else if(last[1]=='/')
1N/A last++;
1N/A }
1N/A else
1N/A {
1N/A /* back over trailing '/' */
1N/A for(;*last=='/' && last > pathname; last--);
1N/A /* preserve // */
1N/A if(last==pathname && *pathname=='/' && pathname[1]=='/')
1N/A last++;
1N/A }
1N/A *(last + 1) = 0;
1N/A return(pathname);
1N/A}