| /***************************************************************************** |
| * dirent.h - dirent API for Microsoft Visual Studio |
| * |
| * Copyright (C) 2006 Toni Ronkko |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining |
| * a copy of this software and associated documentation files (the |
| * ``Software''), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sublicense, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| * IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| * |
| * Dec 15, 2009, John Cunningham |
| * Added rewinddir member function |
| * |
| * Jan 18, 2008, Toni Ronkko |
| * Using FindFirstFileA and WIN32_FIND_DATAA to avoid converting string |
| * between multi-byte and unicode representations. This makes the |
| * code simpler and also allows the code to be compiled under MingW. Thanks |
| * to Azriel Fasten for the suggestion. |
| * |
| * Mar 4, 2007, Toni Ronkko |
| * Bug fix: due to the strncpy_s() function this file only compiled in |
| * Visual Studio 2005. Using the new string functions only when the |
| * compiler version allows. |
| * |
| * Nov 2, 2006, Toni Ronkko |
| * Major update: removed support for Watcom C, MS-DOS and Turbo C to |
| * simplify the file, updated the code to compile cleanly on Visual |
| * Studio 2005 with both unicode and multi-byte character strings, |
| * removed rewinddir() as it had a bug. |
| * |
| * Aug 20, 2006, Toni Ronkko |
| * Removed all remarks about MSVC 1.0, which is antiqued now. Simplified |
| * comments by removing SGML tags. |
| * |
| * May 14 2002, Toni Ronkko |
| * Embedded the function definitions directly to the header so that no |
| * source modules need to be included in the Visual Studio project. Removed |
| * all the dependencies to other projects so that this very header can be |
| * used independently. |
| * |
| * May 28 1998, Toni Ronkko |
| * First version. |
| *****************************************************************************/ |
| #ifndef __WINDOWS_DIRENT_H |
| #define __WINDOWS_DIRENT_H |
| |
| #include <windows.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| typedef struct dirent |
| { |
| char d_name[MAX_PATH + 1]; /* current dir entry (multi-byte char string) */ |
| WIN32_FIND_DATAA data; /* file attributes */ |
| } dirent; |
| |
| |
| typedef struct DIR |
| { |
| dirent current; /* Current directory entry */ |
| int cached; /* Indicates un-processed entry in memory */ |
| HANDLE search_handle; /* File search handle */ |
| char patt[MAX_PATH + 3]; /* search pattern (3 = pattern + "\\*\0") */ |
| } DIR; |
| |
| |
| /* Forward declarations */ |
| static DIR *opendir (const char *dirname); |
| static struct dirent *readdir (DIR *dirp); |
| static int closedir (DIR *dirp); |
| |
| #ifndef USE_VTK_COSMO |
| static void rewinddir(DIR* dirp); |
| #endif |
| |
| /* Use the new safe string functions introduced in Visual Studio 2005 */ |
| #if defined(_MSC_VER) && _MSC_VER >= 1400 |
| # define STRNCPY(dest,src,size) strncpy_s((dest),(size),(src),_TRUNCATE) |
| #else |
| # define STRNCPY(dest,src,size) strncpy((dest),(src),(size)) |
| #endif |
| |
| |
| /***************************************************************************** |
| * Open directory stream DIRNAME for read and return a pointer to the |
| * internal working area that is used to retrieve individual directory |
| * entries. |
| */ |
| static DIR *opendir(const char *dirname) |
| { |
| DIR *dirp; |
| assert (dirname != NULL); |
| assert (strlen (dirname) < MAX_PATH); |
| |
| /* construct new DIR structure */ |
| dirp = (DIR*) malloc (sizeof (struct DIR)); |
| if (dirp != NULL) { |
| char *p; |
| |
| /* take directory name... */ |
| STRNCPY (dirp->patt, dirname, sizeof(dirp->patt)); |
| dirp->patt[MAX_PATH] = '\0'; |
| |
| /* ... and append search pattern to it */ |
| p = strchr (dirp->patt, '\0'); |
| if (dirp->patt < p && *(p-1) != '\\' && *(p-1) != ':') { |
| *p++ = '\\'; |
| } |
| *p++ = '*'; |
| *p = '\0'; |
| |
| /* open stream and retrieve first file */ |
| dirp->search_handle = FindFirstFileA (dirp->patt, &dirp->current.data); |
| if (dirp->search_handle == INVALID_HANDLE_VALUE) { |
| /* invalid search pattern? */ |
| free (dirp); |
| return NULL; |
| } |
| |
| /* there is an un-processed directory entry in memory now */ |
| dirp->cached = 1; |
| } |
| |
| return dirp; |
| } |
| |
| |
| /***************************************************************************** |
| * Read a directory entry, and return a pointer to a dirent structure |
| * containing the name of the entry in d_name field. Individual directory |
| * entries returned by this very function include regular files, |
| * sub-directories, pseudo-directories "." and "..", but also volume labels, |
| * hidden files and system files may be returned. |
| */ |
| static struct dirent *readdir(DIR *dirp) |
| { |
| assert (dirp != NULL); |
| |
| if (dirp->search_handle == INVALID_HANDLE_VALUE) { |
| /* directory stream was opened/rewound incorrectly or ended normally */ |
| return NULL; |
| } |
| |
| /* get next directory entry */ |
| if (dirp->cached != 0) { |
| /* a valid directory entry already in memory */ |
| dirp->cached = 0; |
| } else { |
| /* read next directory entry from disk */ |
| if (FindNextFileA (dirp->search_handle, &dirp->current.data) == FALSE) { |
| /* the very last file has been processed or an error occured */ |
| FindClose (dirp->search_handle); |
| dirp->search_handle = INVALID_HANDLE_VALUE; |
| return NULL; |
| } |
| } |
| |
| /* copy as a multibyte character string */ |
| STRNCPY ( dirp->current.d_name, |
| dirp->current.data.cFileName, |
| sizeof(dirp->current.d_name) ); |
| dirp->current.d_name[MAX_PATH] = '\0'; |
| |
| return &dirp->current; |
| } |
| |
| /***************************************************************************** |
| * Close directory stream opened by opendir() function. Close of the |
| * directory stream invalidates the DIR structure as well as any previously |
| * read directory entry. |
| */ |
| static int closedir(DIR *dirp) |
| { |
| assert (dirp != NULL); |
| |
| /* release search handle */ |
| if (dirp->search_handle != INVALID_HANDLE_VALUE) { |
| FindClose (dirp->search_handle); |
| dirp->search_handle = INVALID_HANDLE_VALUE; |
| } |
| |
| /* release directory handle */ |
| free (dirp); |
| return 0; |
| } |
| |
| #ifndef USE_VTK_COSMO |
| |
| /***************************************************************************** |
| * Resets the position of the directory stream to which dirp refers to the |
| * beginning of the directory. It also causes the directory stream to refer |
| * to the current state of the corresponding directory, as a call to opendir() |
| * would have done. If dirp does not refer to a directory stream, the effect |
| * is undefined. |
| */ |
| static void rewinddir(DIR* dirp) |
| { |
| /* release search handle */ |
| if (dirp->search_handle != INVALID_HANDLE_VALUE) { |
| FindClose (dirp->search_handle); |
| dirp->search_handle = INVALID_HANDLE_VALUE; |
| } |
| |
| /* open new search handle and retrieve first file */ |
| dirp->search_handle = FindFirstFileA (dirp->patt, &dirp->current.data); |
| if (dirp->search_handle == INVALID_HANDLE_VALUE) { |
| /* invalid search pattern? */ |
| free (dirp); |
| return; |
| } |
| |
| /* there is an un-processed directory entry in memory now */ |
| dirp->cached = 1; |
| } |
| |
| #endif |
| |
| #endif /*__WINDOWS_DIRENT_H*/ |