* autoload.cc (GetCompressedFileSize): Add.

* fhandler_disk_file.cc (fhandler_disk_file::fstat_helper): Compute
	st_blocks value from GetCompressedFileSize() if available.

winsup/cygwin/ChangeLog

@@ -1,3 +1,9 @@
+2003-02-20  Corinna Vinschen  <corinna@vinschen.de>
+
+	* autoload.cc (GetCompressedFileSize): Add.
+	* fhandler_disk_file.cc (fhandler_disk_file::fstat_helper): Compute
+	st_blocks value from GetCompressedFileSize() if available.
+
 2003-02-18  Vaclav Haisman  <V.Haisman@sh.cvut.cz>
 
 	* wincap.h (wincaps::supports_sparse_files): New flag.

winsup/cygwin/autoload.cc

@@ -497,6 +497,7 @@ LoadDLLfunc (CoCreateInstance, 20, ole32)
 LoadDLLfuncEx (CancelIo, 4, kernel32, 1)
 LoadDLLfuncEx (CreateHardLinkA, 12, kernel32, 1)
 LoadDLLfuncEx (CreateToolhelp32Snapshot, 8, kernel32, 1)
+LoadDLLfuncEx2 (GetCompressedFileSizeA, 8, kernel32, 1, 0xffffffff)
 LoadDLLfuncEx (GetConsoleWindow, 0, kernel32, 1)
 LoadDLLfuncEx2 (IsDebuggerPresent, 0, kernel32, 1, 1)
 LoadDLLfuncEx (Process32First, 8, kernel32, 1)

winsup/cygwin/fhandler_disk_file.cc

@@ -260,6 +260,19 @@ fhandler_disk_file::fstat_helper (struct __stat64 *buf, path_conv *pc,
     }
 
   buf->st_blksize = S_BLKSIZE;
+
+  /* GetCompressedFileSize() gets autoloaded.  It returns INVALID_FILE_SIZE
+     if it doesn't exist.  Since that's also a valid return value on 64bit
+     capable file systems, we must additionally check for the win32 error. */
+  nFileSizeLow = GetCompressedFileSizeA (pc->get_win32 (), &nFileSizeHigh);
+  if (nFileSizeLow != INVALID_FILE_SIZE || GetLastError () == NO_ERROR)
+    /* On systems supporting compressed (and sparsed) files,
+       GetCompressedFileSize() returns the actual amount of
+       bytes allocated on disk.  */
+    buf->st_blocks = (((__off64_t)nFileSizeHigh << 32)
+		     + nFileSizeLow + S_BLKSIZE - 1) / S_BLKSIZE;
+  else
+    /* Just compute no. of blocks from file size. */
     buf->st_blocks  = (buf->st_size + S_BLKSIZE - 1) / S_BLKSIZE;
 
   buf->st_mode = 0;