49d1a4c562
also start prefering NtDll API. so far: * NtQueryInformationFile * NtClose adds a performance workaround for windows unicode conversion. but that should probably be removed before merging
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* basename.c
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*
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* $Id: basename.c,v 1.2 2007/03/08 23:15:58 keithmarshall Exp $
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*
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* Provides an implementation of the "basename" function, conforming
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* to SUSv3, with extensions to accommodate Win32 drive designators,
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* and suitable for use on native Microsoft(R) Win32 platforms.
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*
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* Written by Keith Marshall <keithmarshall@users.sourceforge.net>
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*
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* This is free software. You may redistribute and/or modify it as you
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* see fit, without restriction of copyright.
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*
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* This software is provided "as is", in the hope that it may be useful,
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* but WITHOUT WARRANTY OF ANY KIND, not even any implied warranty of
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* MERCHANTABILITY, nor of FITNESS FOR ANY PARTICULAR PURPOSE. At no
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* time will the author accept any form of liability for any damages,
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* however caused, resulting from the use of this software.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <libgen.h>
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#include <locale.h>
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#ifndef __cdecl
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#define __cdecl
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#endif
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char * __cdecl
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basename (char *path)
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{
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static char *retfail = NULL;
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size_t len;
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/* to handle path names for files in multibyte character locales,
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* we need to set up LC_CTYPE to match the host file system locale
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*/
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char *locale = setlocale (LC_CTYPE, NULL);
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if (locale != NULL)
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locale = strdup (locale);
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setlocale (LC_CTYPE, "");
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if (path && *path)
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{
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/* allocate sufficient local storage space,
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* in which to create a wide character reference copy of path
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*/
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wchar_t refcopy[1 + (len = mbstowcs (NULL, path, 0))];
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/* create the wide character reference copy of path,
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* and step over the drive designator, if present ...
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*/
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wchar_t *refpath = refcopy;
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if ((len = mbstowcs( refpath, path, len)) > 1 && refpath[1] == L':')
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{
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/* FIXME: maybe should confirm *refpath is a valid drive designator */
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refpath += 2;
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}
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/* ensure that our wide character reference path is NUL terminated */
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refcopy[len] = L'\0';
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/* check again, just to ensure we still have a non-empty path name ... */
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if (*refpath)
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{
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/* and, when we do, process it in the wide character domain ...
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* scanning from left to right, to the char after the final dir separator. */
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wchar_t *refname;
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for (refname = refpath; *refpath; ++refpath)
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{
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if (*refpath == L'/' || *refpath == L'\\')
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{
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/* we found a dir separator ...
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* step over it, and any others which immediately follow it. */
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while (*refpath == L'/' || *refpath == L'\\')
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++refpath;
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/* if we didn't reach the end of the path string ... */
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if (*refpath)
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/* then we have a new candidate for the base name. */
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refname = refpath;
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/* otherwise ...
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* strip off any trailing dir separators which we found. */
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else
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while (refpath > refname
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&& (*--refpath == L'/' || *refpath == L'\\') )
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*refpath = L'\0';
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}
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}
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/* in the wide character domain ...
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* refname now points at the resolved base name ... */
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if (*refname)
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{
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/* if it's not empty,
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* then we transform the full normalised path back into
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* the multibyte character domain, and skip over the dirname,
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* to return the resolved basename. */
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if ((len = wcstombs( path, refcopy, len)) != (size_t)(-1))
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path[len] = '\0';
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*refname = L'\0';
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if ((len = wcstombs( NULL, refcopy, 0 )) != (size_t)(-1))
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path += len;
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}
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else
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{
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/* the basename is empty, so return the default value of "/",
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* transforming from wide char to multibyte char domain, and
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* returning it in our own buffer. */
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retfail = realloc (retfail, len = 1 + wcstombs (NULL, L"/", 0));
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wcstombs (path = retfail, L"/", len);
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}
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/* restore the caller's locale, clean up, and return the result */
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setlocale (LC_CTYPE, locale);
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free (locale);
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return path;
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}
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/* or we had an empty residual path name, after the drive designator,
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* in which case we simply fall through ... */
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}
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/* and, if we get to here ...
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* the path name is either NULL, or it decomposes to an empty string;
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* in either case, we return the default value of "." in our own buffer,
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* reloading it with the correct value, transformed from the wide char
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* to the multibyte char domain, just in case the caller trashed it
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* after a previous call.
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*/
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retfail = realloc (retfail, len = 1 + wcstombs( NULL, L".", 0));
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wcstombs (retfail, L".", len);
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/* restore the caller's locale, clean up, and return the result. */
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setlocale (LC_CTYPE, locale);
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free (locale);
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return retfail;
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}
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