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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* dirname(3) implementation
*/
#include <ast_std.h>
#if defined(__EXPORT__)
#define extern __EXPORT__
#endif
extern char *dirname(register char *pathname)
{
register char *last;
/* go to end of path */
for(last=pathname; *last; last++);
/* back over trailing '/' */
while(last>pathname && *--last=='/');
/* back over non-slash chars */
for(;last>pathname && *last!='/';last--);
if(last==pathname)
{
/* all '/' or "" */
if(*last!='/')
*last = '.';
/* preserve // */
else if(last[1]=='/')
last++;
}
else
{
/* back over trailing '/' */
for(;*last=='/' && last > pathname; last--);
/* preserve // */
if(last==pathname && *pathname=='/' && pathname[1]=='/')
last++;
}
*(last + 1) = 0;
return(pathname);
}
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