Fixing and upgrading Fl_Preferences (#374)

* Added filename function to Fl_Preferences

Static function to get filename before opening.
Member to get filename after opening.
Bug fixes for memory mapped preferences.

* ERROR is a macro on Windows, don't use it

* Added Fl_Preferences::dirty().

User can now check if the database will be written
when flushed or destroyed.
Flush returns a crude error code.

* Fl_Preferences::get binary data returns # of bytes read.

* Verified group deletion code

* Fl_Preferences ignores locale.

This will make .prefs files interchangeable
between different computers.

* Updating the Preferences Mode to ignore locale.

* Fixes in docs.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/drivers/WinAPI/Fl_WinAPI_System_Driver.H b/src/drivers/WinAPI/Fl_WinAPI_System_Driver.H
index a31d5248b..60dca9d17 100644
--- a/src/drivers/WinAPI/Fl_WinAPI_System_Driver.H
+++ b/src/drivers/WinAPI/Fl_WinAPI_System_Driver.H
@@ -67,6 +67,8 @@ public:
   virtual unsigned utf8to_mb(const char *src, unsigned srclen, char *dst, unsigned dstlen);
   virtual unsigned utf8from_mb(char *dst, unsigned dstlen, const char *src, unsigned srclen);
   virtual int clocale_printf(FILE *output, const char *format, va_list args);
+  virtual int clocale_snprintf(char *output, size_t output_size, const char *format, va_list args);
+  virtual int clocale_sscanf(const char *input, const char *format, va_list args);
   // these 2 are in Fl_get_key_win32.cxx
   virtual int event_key(int k);
   virtual int get_key(int k);