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Imported Upstream version 1.4.15

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Jan Wagner 2013-11-26 23:57:29 +01:00
parent 882cdeecca
commit 047baae1ca
386 changed files with 60019 additions and 38317 deletions
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64
gl/dirname.c
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@ -1,6 +1,6 @@
/* dirname.c -- return all but the last element in a file name
Copyright (C) 1990, 1998, 2000, 2001, 2003, 2004, 2005, 2006 Free Software
Copyright (C) 1990, 1998, 2000-2001, 2003-2006, 2009-2010 Free Software
Foundation, Inc.
This program is free software: you can redistribute it and/or modify
@ -20,65 +20,19 @@
#include "dirname.h"
#include <stdlib.h>
#include <string.h>
#include "xalloc.h"
/* Return the length of the prefix of FILE that will be used by
dir_name. If FILE is in the working directory, this returns zero
even though `dir_name (FILE)' will return ".". Works properly even
if there are trailing slashes (by effectively ignoring them). */
size_t
dir_len (char const *file)
{
size_t prefix_length = FILE_SYSTEM_PREFIX_LEN (file);
size_t length;
/* Advance prefix_length beyond important leading slashes. */
prefix_length += (prefix_length != 0
? (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
&& ISSLASH (file[prefix_length]))
: (ISSLASH (file[0])
? ((DOUBLE_SLASH_IS_DISTINCT_ROOT
&& ISSLASH (file[1]) && ! ISSLASH (file[2])
? 2 : 1))
: 0));
/* Strip the basename and any redundant slashes before it. */
for (length = last_component (file) - file;
prefix_length < length; length--)
if (! ISSLASH (file[length - 1]))
break;
return length;
}
/* In general, we can't use the builtin `dirname' function if available,
since it has different meanings in different environments.
In some environments the builtin `dirname' modifies its argument.
Return the leading directories part of FILE, allocated with xmalloc.
Works properly even if there are trailing slashes (by effectively
ignoring them). Unlike POSIX dirname(), FILE cannot be NULL.
If lstat (FILE) would succeed, then { chdir (dir_name (FILE));
lstat (base_name (FILE)); } will access the same file. Likewise,
if the sequence { chdir (dir_name (FILE));
rename (base_name (FILE), "foo"); } succeeds, you have renamed FILE
to "foo" in the same directory FILE was in. */
/* Just like mdir_name (dirname-lgpl.c), except, rather than
returning NULL upon malloc failure, here, we report the
"memory exhausted" condition and exit. */
char *
dir_name (char const *file)
{
size_t length = dir_len (file);
bool append_dot = (length == 0
|| (FILE_SYSTEM_DRIVE_PREFIX_CAN_BE_RELATIVE
&& length == FILE_SYSTEM_PREFIX_LEN (file)
&& file[2] != '\0' && ! ISSLASH (file[2])));
char *dir = xmalloc (length + append_dot + 1);
memcpy (dir, file, length);
if (append_dot)
dir[length++] = '.';
dir[length] = '\0';
return dir;
char *result = mdir_name (file);
if (!result)
xalloc_die ();
return result;
}