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test whether pointer is non-NULL before using it, not after, in wxAnimation::Load...
[wxWidgets.git] / include / wx / filefn.h
diff --git a/include/wx/filefn.h b/include/wx/filefn.h
index 67fae5e069560a697e153b3341674395cc4442a6..466adfaa7dac1979810e229644b639d540d38959 100644 (file)
--- a/include/wx/filefn.h
+++ b/include/wx/filefn.h
@@ -170,7 +170,7 @@ enum wxFileKind
 
     // detect compilers which have support for huge files
     #if defined(__VISUALC__)
 
     // detect compilers which have support for huge files
     #if defined(__VISUALC__)
-       #define wxHAS_HUGE_FILES 1
+        #define wxHAS_HUGE_FILES 1
     #elif defined(__MINGW32__)
         #define wxHAS_HUGE_FILES 1
     #elif defined(_LARGE_FILES)
     #elif defined(__MINGW32__)
         #define wxHAS_HUGE_FILES 1
     #elif defined(_LARGE_FILES)
@@ -181,12 +181,6 @@ enum wxFileKind
     // huge file support (or at least not all functions needed for it by wx)
     // currently
 
     // huge file support (or at least not all functions needed for it by wx)
     // currently
 
-
-    // functions
-    #if defined(__BORLANDC__) || defined(__WATCOMC__)
-        #define   _tell        tell
-    #endif
-
     #ifdef wxHAS_HUGE_FILES
         typedef wxLongLong_t wxFileOffset;
         #define wxFileOffsetFmtSpec wxLongLongFmtSpec
     #ifdef wxHAS_HUGE_FILES
         typedef wxLongLong_t wxFileOffset;
         #define wxFileOffsetFmtSpec wxLongLongFmtSpec
@@ -194,7 +188,33 @@ enum wxFileKind
         typedef off_t wxFileOffset;
     #endif
 
         typedef off_t wxFileOffset;
     #endif
 
-    #define   wxClose      _close
+
+    // functions
+
+    // MSVC and compatible compilers prepend underscores to the POSIX function
+    // names, other compilers don't and even if their later versions usually do
+    // define the versions with underscores for MSVC compatibility, it's better
+    // to avoid using them as they're not present in earlier versions and
+    // always using the native functions spelling is easier than testing for
+    // the versions
+    #if defined(__BORLANDC__) || defined(__DMC__) || defined(__WATCOMC__)
+        #define wxPOSIX_IDENT(func)    ::func
+    #else // by default assume MSVC-compatible names
+        #define wxPOSIX_IDENT(func)    _ ## func
+        #define wxHAS_UNDERSCORES_IN_POSIX_IDENTS
+    #endif
+
+    // at least Borland 5.5 doesn't like "struct ::stat" so don't use the scope
+    // resolution operator present in wxPOSIX_IDENT for it
+    #ifdef __BORLANDC__
+        #define wxPOSIX_STRUCT(s)    struct s
+    #else
+        #define wxPOSIX_STRUCT(s)    struct wxPOSIX_IDENT(s)
+    #endif
+
+    // first functions not working with strings, i.e. without ANSI/Unicode
+    // complications
+    #define   wxClose      wxPOSIX_IDENT(close)
 
     #if defined(__MWERKS__)
         #if __MSL__ >= 0x6000
 
     #if defined(__MWERKS__)
         #if __MSL__ >= 0x6000
@@ -206,33 +226,33 @@ enum wxFileKind
             #define wxWrite(fd, buf, nCount)\
                   _write(fd, (const char *)buf, nCount)
         #endif
             #define wxWrite(fd, buf, nCount)\
                   _write(fd, (const char *)buf, nCount)
         #endif
-    #else
-        #if defined(__DMC__) || defined(__WATCOMC__)
-            #define wxRead        ::read
-            #define wxWrite       ::write
-        #else
-            #define wxRead         _read
-            #define wxWrite        _write
-        #endif
+    #else // __MWERKS__
+        #define wxRead         wxPOSIX_IDENT(read)
+        #define wxWrite        wxPOSIX_IDENT(write)
     #endif
     #endif
+
     #ifdef wxHAS_HUGE_FILES
     #ifdef wxHAS_HUGE_FILES
-        #define   wxSeek       _lseeki64
-        #define   wxLseek      _lseeki64
-        #define   wxTell       _telli64
+        #define   wxSeek       wxPOSIX_IDENT(lseeki64)
+        #define   wxLseek      wxPOSIX_IDENT(lseeki64)
+        #define   wxTell       wxPOSIX_IDENT(telli64)
     #else // !wxHAS_HUGE_FILES
     #else // !wxHAS_HUGE_FILES
-        #define   wxSeek       _lseek
-        #define   wxLseek      _lseek
-        #define   wxTell       _tell
+        #define   wxSeek       wxPOSIX_IDENT(lseek)
+        #define   wxLseek      wxPOSIX_IDENT(lseek)
+        #define   wxTell       wxPOSIX_IDENT(tell)
     #endif // wxHAS_HUGE_FILES/!wxHAS_HUGE_FILES
 
     #endif // wxHAS_HUGE_FILES/!wxHAS_HUGE_FILES
 
-    #define   wxFsync      _commit
+    #ifndef __WATCOMC__
+        #if !defined(__BORLANDC__) || (__BORLANDC__ > 0x540)
+           // NB: this one is not POSIX and always has the underscore
+           #define   wxFsync      _commit
 
 
-    #if defined(__WATCOMC__)
-        #define   wxEof        ::eof
-    #else
-        #define   wxEof        _eof
+           #define HAVE_FSYNC
+       #endif // BORLANDC
     #endif
 
     #endif
 
+    #define   wxEof        wxPOSIX_IDENT(eof)
+
+    // then the functions taking strings
     #if wxUSE_UNICODE
         #if wxUSE_UNICODE_MSLU
             // implement the missing file functions in Win9x ourselves
     #if wxUSE_UNICODE
         #if wxUSE_UNICODE_MSLU
             // implement the missing file functions in Win9x ourselves
@@ -241,17 +261,19 @@ enum wxFileKind
                 || ( defined(__MWERKS__) && defined(__WXMSW__) ) \
                 || ( defined(__BORLANDC__) && (__BORLANDC__ > 0x460) ) \
                 || defined(__DMC__)
                 || ( defined(__MWERKS__) && defined(__WXMSW__) ) \
                 || ( defined(__BORLANDC__) && (__BORLANDC__ > 0x460) ) \
                 || defined(__DMC__)
-                #ifdef __BORLANDC__
-                    // BCC has _stati64() function but struct stati64
-                    #define _stati64 stati64
-                #endif // __BORLANDC__
 
 
-                WXDLLIMPEXP_BASE int wxMSLU__wopen(const wxChar *name, int flags, int mode);
-                WXDLLIMPEXP_BASE int wxMSLU__waccess(const wxChar *name, int mode);
+                WXDLLIMPEXP_BASE int wxMSLU__wopen(const wxChar *name,
+                                                   int flags, int mode);
+                WXDLLIMPEXP_BASE int wxMSLU__waccess(const wxChar *name,
+                                                     int mode);
                 WXDLLIMPEXP_BASE int wxMSLU__wmkdir(const wxChar *name);
                 WXDLLIMPEXP_BASE int wxMSLU__wrmdir(const wxChar *name);
                 WXDLLIMPEXP_BASE int wxMSLU__wmkdir(const wxChar *name);
                 WXDLLIMPEXP_BASE int wxMSLU__wrmdir(const wxChar *name);
-                WXDLLIMPEXP_BASE int wxMSLU__wstat(const wxChar *name, struct _stat *buffer);
-                WXDLLIMPEXP_BASE int wxMSLU__wstati64(const wxChar *name, struct _stati64 *buffer);
+
+                WXDLLIMPEXP_BASE int
+                wxMSLU__wstat(const wxChar *name, wxPOSIX_STRUCT(stat) *buffer);
+                WXDLLIMPEXP_BASE int
+                wxMSLU__wstati64(const wxChar *name,
+                                 wxPOSIX_STRUCT(stati64) *buffer);
             #endif // Windows compilers with MSLU support
 
             #define   wxOpen       wxMSLU__wopen
             #endif // Windows compilers with MSLU support
 
             #define   wxOpen       wxMSLU__wopen
@@ -264,34 +286,43 @@ enum wxFileKind
             #else
                 #define   wxStat       wxMSLU__wstat
             #endif
             #else
                 #define   wxStat       wxMSLU__wstat
             #endif
-        #else
-            #define   wxOpen       _wopen
-            #define   wxAccess     _waccess
-            #define   wxMkDir      _wmkdir
-            #define   wxRmDir      _wrmdir
-            #ifdef wxHAS_HUGE_FILES
-                #define   wxStat       _wstati64
+        #else // !wxUSE_UNICODE_MSLU
+            #ifdef __BORLANDC__
+                #if __BORLANDC__ >= 0x550 && __BORLANDC__ <= 0x551
+                    WXDLLIMPEXP_BASE int wxOpen(const wxChar *pathname,
+                                                int flags, mode_t mode);
+                #else
+                    #define   wxOpen       _wopen
+                #endif
+                #define   wxAccess     _waccess
+                #define   wxMkDir      _wmkdir
+                #define   wxRmDir      _wrmdir
+                #ifdef wxHAS_HUGE_FILES
+                    #define   wxStat       _wstati64
+                #else
+                    #define   wxStat       _wstat
+                #endif
             #else
             #else
-                #define   wxStat       _wstat
+                #define   wxOpen       _wopen
+                #define   wxAccess     _waccess
+                #define   wxMkDir      _wmkdir
+                #define   wxRmDir      _wrmdir
+                #ifdef wxHAS_HUGE_FILES
+                    #define   wxStat       _wstati64
+                #else
+                    #define   wxStat       _wstat
+                #endif
             #endif
             #endif
-        #endif
+        #endif // wxUSE_UNICODE_MSLU/!wxUSE_UNICODE_MSLU
     #else // !wxUSE_UNICODE
     #else // !wxUSE_UNICODE
-        #ifdef __BORLANDC__
-            #define   wxOpen       open
-        #else
-            #define   wxOpen       _open
-        #endif
-        #define   wxAccess     _access
-        #define   wxMkDir      _mkdir
-        #ifdef __WATCOMC__
-            #define   wxRmDir      rmdir
-        #else
-            #define   wxRmDir      _rmdir
-        #endif
+        #define   wxOpen       wxPOSIX_IDENT(open)
+        #define   wxAccess     wxPOSIX_IDENT(access)
+        #define   wxMkDir      wxPOSIX_IDENT(mkdir)
+        #define   wxRmDir      wxPOSIX_IDENT(rmdir)
         #ifdef wxHAS_HUGE_FILES
         #ifdef wxHAS_HUGE_FILES
-            #define   wxStat       _stati64
+            #define   wxStat       wxPOSIX_IDENT(stati64)
         #else
         #else
-            #define   wxStat       _stat
+            #define   wxStat       wxPOSIX_IDENT(stat)
         #endif
     #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 
         #endif
     #endif // wxUSE_UNICODE/!wxUSE_UNICODE
 
@@ -313,7 +344,7 @@ enum wxFileKind
     #endif
 
     // constants (unless already defined by the user code)
     #endif
 
     // constants (unless already defined by the user code)
-    #if !defined(__BORLANDC__) && !defined(__WATCOMC__)
+    #ifdef wxHAS_UNDERSCORES_IN_POSIX_IDENTS
         #ifndef O_RDONLY
             #define   O_RDONLY    _O_RDONLY
             #define   O_WRONLY    _O_WRONLY
         #ifndef O_RDONLY
             #define   O_RDONLY    _O_RDONLY
             #define   O_WRONLY    _O_WRONLY
@@ -328,7 +359,7 @@ enum wxFileKind
             #define   S_IFDIR     _S_IFDIR
             #define   S_IFREG     _S_IFREG
         #endif
             #define   S_IFDIR     _S_IFDIR
             #define   S_IFREG     _S_IFREG
         #endif
-    #endif
+    #endif // wxHAS_UNDERSCORES_IN_POSIX_IDENTS
 
     #ifdef wxHAS_HUGE_FILES
         // wxFile is present and supports large files. Currently wxFFile
 
     #ifdef wxHAS_HUGE_FILES
         // wxFile is present and supports large files. Currently wxFFile
@@ -421,7 +452,7 @@ const int wxInvalidOffset = -1;
 WXDLLIMPEXP_BASE bool wxFileExists(const wxString& filename);
 
 // does the path exist? (may have or not '/' or '\\' at the end)
 WXDLLIMPEXP_BASE bool wxFileExists(const wxString& filename);
 
 // does the path exist? (may have or not '/' or '\\' at the end)
-WXDLLIMPEXP_BASE bool wxDirExists(const wxChar *pszPathName);
+WXDLLIMPEXP_BASE bool wxDirExists(const wxString& pathName);
 
 WXDLLIMPEXP_BASE bool wxIsAbsolutePath(const wxString& filename);
 
 
 WXDLLIMPEXP_BASE bool wxIsAbsolutePath(const wxString& filename);
 
wxWidgets (Impactor)