libgen: basename and dirname [PATCH]

[Jeff Johnston]

Checked in with massaging.  The declarations of functions and their prototypes 
should use the _DEFUN and _EXFUN macros from <_ansi.h>.

I moved the functions to ELIX_LEVEL_4_OBJS.  You will see the same thing as you 
do now.

I also created a new libgen.h header file from scratch that doesn't have the 
Cygwin license..

-- Jeff J.

Shaun Jackman wrote:
> On Apr 8, 2005 10:51 AM, Jeff Johnston <jjohnstn@redhat.com> wrote:
> 
>>I realize it is a pain, but it could be a whole lot worse if we forced everyone
>>to sign a permission form like the FSF does.
>>
>>Regards,
>>
>>-- Jeff J.
> 
> 
> It's not a problem. I understand the purpose of copyrights and
> licenses. Here's the revised patch. I stole libgen.h from
> winsup/cygwin/include/libgen.h..
> 
> Cheers,
> Shaun
> 
> 2005-04-08  Shaun Jackman  <sjackman@gmail.com>
> 
> 	* libc/unix/Makefile.am: Add basename.c and dirname.c to GENERAL_SOURCES.
> 	* libc/include/libgen.h: New file.
> 	* libc/unix/basename.c: Ditto.
> 	* libc/unix/dirname.c: Ditto.
> 
> diff -u -r1.4 Makefile.am
> --- libc/unix/Makefile.am	26 Aug 2002 18:56:09 -0000	1.4
> +++ libc/unix/Makefile.am	8 Apr 2005 18:25:57 -0000
> @@ -5,6 +5,8 @@
>  INCLUDES = $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS)
>  
>  GENERAL_SOURCES = \
> +	basename.c	\
> +	dirname.c	\
>  	getcwd.c 	\
>  	pread.c 	\
>  	pwrite.c 	\
> diff -u /dev/null libc/include/libgen.h
> --- /dev/null	2005-04-04 21:44:30.000000000 -0700
> +++ libc/include/libgen.h	2005-04-08 10:12:06.000000000 -0700
> @@ -0,0 +1,23 @@
> +/* libgen.h
> +
> +   Copyright 2005 Red Hat, Inc.
> +
> +This file is part of Cygwin.
> +
> +This software is a copyrighted work licensed under the terms of the
> +Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
> +details. */
> +
> +#ifndef _LIBGEN_H
> +#define _LIBGEN_H
> +
> +#include <sys/cdefs.h>
> +
> +__BEGIN_DECLS
> +
> +extern char *basename (char *path);
> +extern char *dirname (char *path);
> +
> +__END_DECLS
> +
> +#endif /* _LIBGEN_H */
> diff -u /dev/null libc/unix/basename.c
> --- /dev/null	2005-04-04 21:44:30.000000000 -0700
> +++ libc/unix/basename.c	2005-04-08 11:28:08.000000000 -0700
> @@ -0,0 +1,22 @@
> +/* Copyright 2005 Shaun Jackman
> + * Permission to use, copy, modify, and distribute this software
> + * is freely granted, provided that this notice is preserved.
> + */
> +
> +#include <string.h>
> +
> +char* basename(char *path)
> +{
> +	char *p;
> +	if( path == NULL || *path == '\0' )
> +		return ".";
> +	p = path + strlen(path) - 1;
> +	while( *p == '/' ) {
> +		if( p == path )
> +			return path;
> +		*p-- = '\0';
> +	}
> +	while( p >= path && *p != '/' )
> +		p--;
> +	return p + 1;
> +}
> diff -u /dev/null libc/unix/dirname.c
> --- /dev/null	2005-04-04 21:44:30.000000000 -0700
> +++ libc/unix/dirname.c	2005-04-08 11:28:11.000000000 -0700
> @@ -0,0 +1,25 @@
> +/* Copyright 2005 Shaun Jackman
> + * Permission to use, copy, modify, and distribute this software
> + * is freely granted, provided that this notice is preserved.
> + */
> +
> +#include <string.h>
> +
> +char* dirname(char *path)
> +{
> +	char *p;
> +	if( path == NULL || *path == '\0' )
> +		return ".";
> +	p = path + strlen(path) - 1;
> +	while( *p == '/' ) {
> +		if( p == path )
> +			return path;
> +		*p-- = '\0';
> +	}
> +	while( p >= path && *p != '/' )
> +		p--;
> +	return
> +		p < path ? "." :
> +		p == path ? "/" :
> +		(*p = '\0', path);
> +}