no real change; just reordered some implementations before real commit

[wxWidgets.git] / src / common / file.cpp

diff --git a/src/common/file.cpp b/src/common/file.cpp
index 45ab8ade8cff914a09e1f0602eaa2f6bc3ec17a5..58e36f221899a1557a96c7015cb2871b53b73092 100644 (file)
--- a/src/common/file.cpp
+++ b/src/common/file.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        file.cpp
+// Name:        src/common/file.cpp
 // Purpose:     wxFile - encapsulates low-level "file descriptor"
 //              wxTempFile
 // Author:      Vadim Zeitlin
@@ -26,28 +26,26 @@
 // standard
 #if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
 
-#ifndef __SALFORDC__
-    #define   WIN32_LEAN_AND_MEAN
-    #define   NOSERVICE
-    #define   NOIME
-    #define   NOATOM
-    #define   NOGDI
-    #define   NOGDICAPMASKS
-    #define   NOMETAFILE
-    #define   NOMINMAX
-    #define   NOMSG
-    #define   NOOPENFILE
-    #define   NORASTEROPS
-    #define   NOSCROLL
-    #define   NOSOUND
-    #define   NOSYSMETRICS
-    #define   NOTEXTMETRIC
-    #define   NOWH
-    #define   NOCOMM
-    #define   NOKANJI
-    #define   NOCRYPT
-    #define   NOMCX
-#endif
+#define   WIN32_LEAN_AND_MEAN
+#define   NOSERVICE
+#define   NOIME
+#define   NOATOM
+#define   NOGDI
+#define   NOGDICAPMASKS
+#define   NOMETAFILE
+#define   NOMINMAX
+#define   NOMSG
+#define   NOOPENFILE
+#define   NORASTEROPS
+#define   NOSCROLL
+#define   NOSOUND
+#define   NOSYSMETRICS
+#define   NOTEXTMETRIC
+#define   NOWH
+#define   NOCOMM
+#define   NOKANJI
+#define   NOCRYPT
+#define   NOMCX
 
 #elif defined(__WXMSW__) && defined(__WXWINCE__)
     #include  "wx/msw/missing.h"
@@ -82,6 +80,8 @@
     char* mktemp( char * path ) { return path ;}
     #include <stat.h>
     #include <unistd.h>
+#elif defined(__WXPALMOS__)
+    #include "wx/palmos/missing.h"
 #else
     #error  "Please specify the header with file functions declarations."
 #endif  //Win/UNIX
@@ -99,23 +99,12 @@
     };
 #endif // W_OK
 
-#ifdef __SALFORDC__
-    #include <unix.h>
-#endif
-
-// some broken compilers don't have 3rd argument in open() and creat()
-#ifdef __SALFORDC__
-    #define ACCESS(access)
-    #define stat    _stat
-#else // normal compiler
-    #define ACCESS(access)  , (access)
-#endif // Salford C
-
 // wxWidgets
 #ifndef WX_PRECOMP
     #include  "wx/string.h"
     #include  "wx/intl.h"
     #include  "wx/log.h"
+    #include "wx/crt.h"
 #endif // !WX_PRECOMP
 
 #include  "wx/filename.h"
@@ -197,16 +186,10 @@ bool wxFile::Create(const wxString& fileName, bool bOverwrite, int accessMode)
 {
     // if bOverwrite we create a new file or truncate the existing one,
     // otherwise we only create the new file and fail if it already exists
-#if defined(__WXMAC__) && !defined(__UNIX__) && !wxUSE_UNICODE
-    // Dominic Mazzoni [dmazzoni+@cs.cmu.edu] reports that open is still broken on the mac, so we replace
-    // int fd = open( fileName , O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL), access);
-    int fd = creat( fileName , accessMode);
-#else
     int fd = wxOpen( fileName,
                      O_BINARY | O_WRONLY | O_CREAT |
-                     (bOverwrite ? O_TRUNC : O_EXCL)
-                     ACCESS(accessMode) );
-#endif
+                     (bOverwrite ? O_TRUNC : O_EXCL),
+                     accessMode );
     if ( fd == -1 )
     {
         wxLogSysError(_("can't create file '%s'"), fileName);
@@ -257,7 +240,7 @@ bool wxFile::Open(const wxString& fileName, OpenMode mode, int accessMode)
     accessMode &= wxS_IRUSR | wxS_IWUSR;
 #endif // __WINDOWS__
 
-    int fd = wxOpen( fileName, flags ACCESS(accessMode));
+    int fd = wxOpen( fileName, flags, accessMode);
 
     if ( fd == -1 )
     {
@@ -410,6 +393,21 @@ wxFileOffset wxFile::Length() const
 {
     wxASSERT( IsOpened() );
 
+    // we use a special method for Linux systems where files in sysfs (i.e.
+    // those under /sys typically) return length of 4096 bytes even when
+    // they're much smaller -- this is a problem as it results in errors later
+    // when we try reading 4KB from them
+#ifdef __LINUX__
+    struct stat st;
+    if ( fstat(m_fd, &st) == 0 )
+    {
+        // returning 0 for the special files indicates to the caller that they
+        // are not seekable
+        return st.st_blocks ? st.st_size : 0;
+    }
+    //else: failed to stat, try the normal method
+#endif // __LINUX__
+
     wxFileOffset iRc = Tell();
     if ( iRc != wxInvalidOffset ) {
         // have to use const_cast :-(
@@ -440,7 +438,7 @@ bool wxFile::Eof() const
 
     wxFileOffset iRc;
 
-#if defined(__DOS__) || defined(__UNIX__) || defined(__GNUWIN32__) || defined( __MWERKS__ ) || defined(__SALFORDC__)
+#if defined(__DOS__) || defined(__UNIX__) || defined(__GNUWIN32__) || defined( __MWERKS__ )
     // @@ this doesn't work, of course, on unseekable file descriptors
     wxFileOffset ofsCur = Tell(),
     ofsMax = Length();