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, 8 insertions, 0 deletions

diff --git a/src/Fl_System_Driver.cxx b/src/Fl_System_Driver.cxx
index 71a60c034..75bbf3ef9 100644
--- a/src/Fl_System_Driver.cxx
+++ b/src/Fl_System_Driver.cxx
@@ -404,6 +404,14 @@ int Fl_System_Driver::clocale_printf(FILE *output, const char *format, va_list a
   return vfprintf(output, format, args);
 }
 
+int Fl_System_Driver::clocale_snprintf(char *output, size_t output_size, const char *format, va_list args) {
+  return vsnprintf(output, output_size, format, args);
+}
+
+int Fl_System_Driver::clocale_sscanf(const char *input, const char *format, va_list args) {
+  return vsscanf(input, format, args);
+}
+
 int Fl_System_Driver::filename_expand(char *to,int tolen, const char *from) {
   char *temp = new char[tolen];
   strlcpy(temp,from, tolen);