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updated dirent.[ch] from mingw-w64.

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git-svn-id: http://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@316 af15c1b1-3010-417e-b628-4374ebc0bcbd
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sezero 2010-08-30 13:50:28 +00:00
parent 12a9aa1004
commit b06952472b
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459
Windows/VisualStudio/dirent.c
View file

@ -1,147 +1,342 @@
/*
* dirent.c
* This file has no copyright assigned and is placed in the Public Domain.
* This file is a part of the mingw-runtime package.
* No warranty is given; refer to the file DISCLAIMER within the package.
*
* Derived from DIRLIB.C by Matt J. Weinstein
* This note appears in the DIRLIB.H
* DIRLIB.H by M. J. Weinstein Released to public domain 1-Jan-89
*
* Updated by Jeremy Bettis <jeremy@hksys.com>
* Significantly revised and rewinddir, seekdir and telldir added by Colin
* Peters <colin@fu.is.saga-u.ac.jp>
*
*/
Implementation of POSIX directory browsing functions and types for Win32.
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
History: Created March 1997. Updated June 2003.
Rights: See end of file.
*/
#include <stddef.h> /* for intptr_t under MSVC */
/*#include <stdint.h>*/
#include <dirent.h>
#include <errno.h>
#include <io.h> /* _findfirst and _findnext set errno if they return -1 */
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <io.h>
#include <direct.h>
#include <dirent.h>
#ifdef __cplusplus
extern "C"
#include <windows.h> /* for GetFileAttributes */
#include <tchar.h>
#define SUFFIX _T("*")
#define SLASH _T("\\")
/* Helper for opendir(). */
static __inline DWORD _tGetFileAttributes (const _TCHAR * tPath)
{
#ifdef _UNICODE
/* GetFileAttributesW does not work on W9x, so convert to ANSI */
if (_osver & 0x8000)
{
char aPath [MAX_PATH];
WideCharToMultiByte (CP_ACP, 0, tPath, -1, aPath, MAX_PATH, NULL, NULL);
return GetFileAttributesA (aPath);
}
return GetFileAttributesW (tPath);
#else
return GetFileAttributesA (tPath);
#endif
struct DIR
{
intptr_t handle; /* -1 for failed rewind */
struct _finddata_t info;
struct dirent result; /* d_name null iff first time */
char *name; /* null-terminated char string */
};
DIR *opendir(const char *name)
{
DIR *dir = 0;
if(name && name[0])
{
size_t base_length = strlen(name);
const char *all = /* search pattern must end with suitable wildcard */
strchr("/\\", name[base_length - 1]) ? "*" : "/*";
if((dir = (DIR *) malloc(sizeof *dir)) != 0 &&
(dir->name = (char *) malloc(base_length + strlen(all) + 1)) != 0)
{
strcat(strcpy(dir->name, name), all);
if((dir->handle = _findfirst(dir->name, &dir->info)) != -1)
{
dir->result.d_name = 0;
}
else /* rollback */
{
free(dir->name);
free(dir);
dir = 0;
}
}
else /* rollback */
{
free(dir);
dir = 0;
errno = ENOMEM;
}
}
else
{
errno = EINVAL;
}
return dir;
}
int closedir(DIR *dir)
{
int result = -1;
if(dir)
{
if(dir->handle != -1)
{
result = _findclose(dir->handle);
}
free(dir->name);
free(dir);
}
if(result == -1) /* map all errors to EBADF */
{
errno = EBADF;
}
return result;
}
struct dirent *readdir(DIR *dir)
{
struct dirent *result = 0;
if(dir && dir->handle != -1)
{
if(!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1)
{
result = &dir->result;
result->d_name = dir->info.name;
}
}
else
{
errno = EBADF;
}
return result;
}
void rewinddir(DIR *dir)
{
if(dir && dir->handle != -1)
{
_findclose(dir->handle);
dir->handle = _findfirst(dir->name, &dir->info);
dir->result.d_name = 0;
}
else
{
errno = EBADF;
}
}
#ifdef __cplusplus
}
#endif
/*
* opendir
*
* Returns a pointer to a DIR structure appropriately filled in to begin
* searching a directory.
*/
_TDIR *
_topendir (const _TCHAR *szPath)
{
_TDIR *nd;
unsigned int rc;
_TCHAR szFullPath[MAX_PATH];
Copyright Kevlin Henney, 1997, 2003. All rights reserved.
errno = 0;
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose is hereby granted without fee, provided
that this copyright and permissions notice appear in all copies and
derivatives.
This software is supplied "as is" without express or implied warranty.
if (!szPath)
{
errno = EFAULT;
return (_TDIR *) 0;
}
But that said, if there are any problems please get in touch.
if (szPath[0] == _T('\0'))
{
errno = ENOTDIR;
return (_TDIR *) 0;
}
/* Attempt to determine if the given path really is a directory. */
rc = _tGetFileAttributes (szPath);
if (rc == INVALID_FILE_ATTRIBUTES)
{
/* call GetLastError for more error info */
errno = ENOENT;
return (_TDIR *) 0;
}
if (!(rc & FILE_ATTRIBUTE_DIRECTORY))
{
/* Error, entry exists but not a directory. */
errno = ENOTDIR;
return (_TDIR *) 0;
}
/* Make an absolute pathname. */
_tfullpath (szFullPath, szPath, MAX_PATH);
/* Allocate enough space to store DIR structure and the complete
* directory path given. */
nd = (_TDIR *) malloc (sizeof (_TDIR) + (_tcslen (szFullPath)
+ _tcslen (SLASH)
+ _tcslen (SUFFIX) + 1)
* sizeof (_TCHAR));
if (!nd)
{
/* Error, out of memory. */
errno = ENOMEM;
return (_TDIR *) 0;
}
/* Create the search expression. */
_tcscpy (nd->dd_name, szFullPath);
/* Add on a slash if the path does not end with one. */
if (nd->dd_name[0] != _T('\0') &&
nd->dd_name[_tcslen (nd->dd_name) - 1] != _T('/') &&
nd->dd_name[_tcslen (nd->dd_name) - 1] != _T('\\'))
{
_tcscat (nd->dd_name, SLASH);
}
/* Add on the search pattern */
_tcscat (nd->dd_name, SUFFIX);
/* Initialize handle to -1 so that a premature closedir doesn't try
* to call _findclose on it. */
nd->dd_handle = -1;
/* Initialize the status. */
nd->dd_stat = 0;
/* Initialize the dirent structure. ino and reclen are invalid under
* Win32, and name simply points at the appropriate part of the
* findfirst_t structure. */
nd->dd_dir.d_ino = 0;
nd->dd_dir.d_reclen = 0;
nd->dd_dir.d_namlen = 0;
memset (nd->dd_dir.d_name, 0, 260 /*FILENAME_MAX*/);
return nd;
}
/*
* readdir
*
* Return a pointer to a dirent structure filled with the information on the
* next entry in the directory.
*/
struct _tdirent *
_treaddir (_TDIR * dirp)
{
errno = 0;
/* Check for valid DIR struct. */
if (!dirp)
{
errno = EFAULT;
return (struct _tdirent *) 0;
}
if (dirp->dd_stat < 0)
{
/* We have already returned all files in the directory
* (or the structure has an invalid dd_stat). */
return (struct _tdirent *) 0;
}
else if (dirp->dd_stat == 0)
{
/* We haven't started the search yet. */
/* Start the search */
dirp->dd_handle = _tfindfirst (dirp->dd_name, &(dirp->dd_dta));
if (dirp->dd_handle == -1)
{
/* Whoops! Seems there are no files in that
* directory. */
dirp->dd_stat = -1;
}
else
{
dirp->dd_stat = 1;
}
}
else
{
/* Get the next search entry. */
if (_tfindnext (dirp->dd_handle, &(dirp->dd_dta)))
{
/* We are off the end or otherwise error.
_findnext sets errno to ENOENT if no more file
Undo this. */
DWORD winerr = GetLastError ();
if (winerr == ERROR_NO_MORE_FILES)
errno = 0;
_findclose (dirp->dd_handle);
dirp->dd_handle = -1;
dirp->dd_stat = -1;
}
else
{
/* Update the status to indicate the correct
* number. */
dirp->dd_stat++;
}
}
if (dirp->dd_stat > 0)
{
/* Successfully got an entry. Everything about the file is
* already appropriately filled in except the length of the
* file name. */
dirp->dd_dir.d_namlen = _tcslen (dirp->dd_dta.name);
_tcscpy (dirp->dd_dir.d_name, dirp->dd_dta.name);
return &dirp->dd_dir;
}
return (struct _tdirent *) 0;
}
/*
* closedir
*
* Frees up resources allocated by opendir.
*/
int
_tclosedir (_TDIR * dirp)
{
int rc;
errno = 0;
rc = 0;
if (!dirp)
{
errno = EFAULT;
return -1;
}
if (dirp->dd_handle != -1)
{
rc = _findclose (dirp->dd_handle);
}
/* Delete the dir structure. */
free (dirp);
return rc;
}
/*
* rewinddir
*
* Return to the beginning of the directory "stream". We simply call findclose
* and then reset things like an opendir.
*/
void
_trewinddir (_TDIR * dirp)
{
errno = 0;
if (!dirp)
{
errno = EFAULT;
return;
}
if (dirp->dd_handle != -1)
{
_findclose (dirp->dd_handle);
}
dirp->dd_handle = -1;
dirp->dd_stat = 0;
}
/*
* telldir
*
* Returns the "position" in the "directory stream" which can be used with
* seekdir to go back to an old entry. We simply return the value in stat.
*/
long
_ttelldir (_TDIR * dirp)
{
errno = 0;
if (!dirp)
{
errno = EFAULT;
return -1;
}
return dirp->dd_stat;
}
/*
* seekdir
*
* Seek to an entry previously returned by telldir. We rewind the directory
* and call readdir repeatedly until either dd_stat is the position number
* or -1 (off the end). This is not perfect, in that the directory may
* have changed while we weren't looking. But that is probably the case with
* any such system.
*/
void
_tseekdir (_TDIR * dirp, long lPos)
{
errno = 0;
if (!dirp)
{
errno = EFAULT;
return;
}
if (lPos < -1)
{
/* Seeking to an invalid position. */
errno = EINVAL;
return;
}
else if (lPos == -1)
{
/* Seek past end. */
if (dirp->dd_handle != -1)
{
_findclose (dirp->dd_handle);
}
dirp->dd_handle = -1;
dirp->dd_stat = -1;
}
else
{
/* Rewind and read forward to the appropriate index. */
_trewinddir (dirp);
while ((dirp->dd_stat < lPos) && _treaddir (dirp))
;
}
}
*/

150
Windows/VisualStudio/dirent.h
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@ -1,50 +1,142 @@
#ifndef DIRENT_INCLUDED
#define DIRENT_INCLUDED
/*
* DIRENT.H (formerly DIRLIB.H)
* This file has no copyright assigned and is placed in the Public Domain.
* This file is a part of the mingw-runtime package.
* No warranty is given; refer to the file DISCLAIMER within the package.
*
*/
Declaration of POSIX directory browsing functions and types for Win32.
#ifndef _DIRENT_H_
#define _DIRENT_H_
Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
History: Created March 1997. Updated June 2003.
Rights: See end of file.
*/
#include <stddef.h>
#include <io.h>
#ifndef RC_INVOKED
#ifdef __cplusplus
extern "C"
{
extern "C" {
#endif
typedef struct DIR DIR;
struct dirent
{
char *d_name;
long d_ino; /* Always zero. */
unsigned short d_reclen; /* Always zero. */
unsigned short d_namlen; /* Length of name in d_name. */
char d_name[260]; /* [FILENAME_MAX] */ /* File name. */
};
DIR *opendir(const char *);
int closedir(DIR *);
struct dirent *readdir(DIR *);
void rewinddir(DIR *);
/*
* This is an internal data structure. Good programmers will not use it
* except as an argument to one of the functions below.
* dd_stat field is now int (was short in older versions).
*/
typedef struct
{
/* disk transfer area for this dir */
struct _finddata_t dd_dta;
/* dirent struct to return from dir (NOTE: this makes this thread
* safe as long as only one thread uses a particular DIR struct at
* a time) */
struct dirent dd_dir;
/* _findnext handle */
intptr_t dd_handle;
/*
* Status of search:
* 0 = not started yet (next entry to read is first entry)
* -1 = off the end
* positive = 0 based index of next entry
*/
int dd_stat;
/* given path for dir with search pattern (struct is extended) */
char dd_name[1];
} DIR;
DIR* __cdecl opendir (const char*);
struct dirent* __cdecl readdir (DIR*);
int __cdecl closedir (DIR*);
void __cdecl rewinddir (DIR*);
long __cdecl telldir (DIR*);
void __cdecl seekdir (DIR*, long);
/* wide char versions */
struct _wdirent
{
long d_ino; /* Always zero. */
unsigned short d_reclen; /* Always zero. */
unsigned short d_namlen; /* Length of name in d_name. */
wchar_t d_name[260]; /* [FILENAME_MAX] */ /* File name. */
};
/*
* This is an internal data structure. Good programmers will not use it
* except as an argument to one of the functions below.
*/
typedef struct
{
/* disk transfer area for this dir */
struct _wfinddata_t dd_dta;
Copyright Kevlin Henney, 1997, 2003. All rights reserved.
/* dirent struct to return from dir (NOTE: this makes this thread
* safe as long as only one thread uses a particular DIR struct at
* a time) */
struct _wdirent dd_dir;
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose is hereby granted without fee, provided
that this copyright and permissions notice appear in all copies and
derivatives.
This software is supplied "as is" without express or implied warranty.
/* _findnext handle */
intptr_t dd_handle;
But that said, if there are any problems please get in touch.
/*
* Status of search:
* 0 = not started yet (next entry to read is first entry)
* -1 = off the end
* positive = 0 based index of next entry
*/
int dd_stat;
*/
/* given path for dir with search pattern (struct is extended) */
wchar_t dd_name[1];
} _WDIR;
#ifdef __cplusplus
_WDIR* __cdecl _wopendir (const wchar_t*);
struct _wdirent* __cdecl _wreaddir (_WDIR*);
int __cdecl _wclosedir (_WDIR*);
void __cdecl _wrewinddir (_WDIR*);
long __cdecl _wtelldir (_WDIR*);
void __cdecl _wseekdir (_WDIR*, long);
#ifdef _UNICODE
#define _tdirent _wdirent
#define _TDIR _WDIR
#define _topendir _wopendir
#define _tclosedir _wclosedir
#define _treaddir _wreaddir
#define _trewinddir _wrewinddir
#define _ttelldir _wtelldir
#define _tseekdir _wseekdir
#else
#define _tdirent dirent
#define _TDIR DIR
#define _topendir opendir
#define _tclosedir closedir
#define _treaddir readdir
#define _trewinddir rewinddir
#define _ttelldir telldir
#define _tseekdir seekdir
#endif
#ifdef __cplusplus
}
#endif
#endif
#endif /* Not RC_INVOKED */
#endif /* Not _DIRENT_H_ */