some more multiplatform support

1 files changed, 199 insertions, 0 deletions

diff --git a/src/common/dirent-win32.c b/src/common/dirent-win32.c
new file mode 100644
index 00000000..273c6732
--- /dev/null
+++ b/src/common/dirent-win32.c
@@ -0,0 +1,199 @@
+/*****************************************************************************
+ * 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.
+ *****************************************************************************/
+
+#include "dirent-win32.h"
+
+/* 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.
+ */
+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.
+ */
+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.
+ */
+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;
+}
+
+
+/*****************************************************************************
+ * 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.
+ */
+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;
+}