move LocaleGuard "up" into libpbd; use LocaleGuard to replace utterly broken std::locale() in Gtkmm2ext::BarController handling of logarithmic values

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@6598 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/ui_config.cc

@@ -25,6 +25,7 @@
 #include <pbd/failed_constructor.h>
 #include <pbd/xml++.h>
 #include <pbd/error.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/ardour.h>
 

libs/ardour/ardour/ardour.h

@@ -79,12 +79,6 @@ namespace ARDOUR {
 	extern Change NameChanged;
 	extern Change BoundsChanged;
 
-	struct LocaleGuard {
-	    LocaleGuard (const char*);
-	    ~LocaleGuard ();
-	    const char* old;
-	};
-
 	static const double SHUTTLE_FRACT_SPEED1=0.48412291827; /* derived from A1,A2 */
 
 	void setup_fpu ();

libs/ardour/audio_diskstream.cc

@@ -32,6 +32,7 @@
 
 #include <pbd/error.h>
 #include <pbd/basename.h>
+#include <pbd/localeguard.h>
 #include <glibmm/thread.h>
 #include <pbd/xml++.h>
 #include <pbd/memento_command.h>

libs/ardour/audio_track.cc

@@ -23,6 +23,7 @@
 
 #include <pbd/error.h>
 #include <pbd/enumwriter.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/audio_track.h>
 #include <ardour/audio_diskstream.h>

libs/ardour/audio_unit.cc

@@ -28,6 +28,7 @@
 #include <pbd/xml++.h>
 #include <pbd/whitespace.h>
 #include <pbd/pathscanner.h>
+#include <pbd/localeguard.h>
 
 #include <glibmm/thread.h>
 #include <glibmm/fileutils.h>

libs/ardour/audioregion.cc

@@ -34,6 +34,7 @@
 #include <pbd/stacktrace.h>
 #include <pbd/enumwriter.h>
 #include <pbd/convert.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/audioregion.h>
 #include <ardour/session.h>

libs/ardour/automation_event.cc

@@ -26,6 +26,7 @@
 #include <sigc++/bind.h>
 #include <ardour/automation_event.h>
 #include <pbd/stacktrace.h>
+#include <pbd/localeguard.h>
 
 #include "i18n.h"
 

libs/ardour/configuration.cc

@@ -26,6 +26,7 @@
 
 #include <pbd/failed_constructor.h>
 #include <pbd/xml++.h>
+#include <pbd/localeguard.h>
 
 #include <midi++/manager.h>
 

libs/ardour/crossfade.cc

@@ -19,7 +19,7 @@
 
 #include <sigc++/bind.h>
 
-#include <pbd/stacktrace.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/types.h>
 #include <ardour/crossfade.h>

libs/ardour/globals.cc

@@ -24,7 +24,6 @@
 #include <sys/resource.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include <locale.h>
 #include <errno.h>
 
 #ifdef VST_SUPPORT
@@ -606,20 +605,6 @@ ARDOUR::find_data_file (string name, string subdir)
 	return find_file (name, envvar, subdir);
 }
 
-ARDOUR::LocaleGuard::LocaleGuard (const char* str)
-{
-	old = strdup (setlocale (LC_NUMERIC, NULL));
-	if (strcmp (old, str)) {
-		setlocale (LC_NUMERIC, str);
-	} 
-}
-
-ARDOUR::LocaleGuard::~LocaleGuard ()
-{
-	setlocale (LC_NUMERIC, old);
-	free ((char*)old);
-}
-
 void
 ARDOUR::setup_fpu ()
 {

libs/ardour/io.cc

@@ -30,6 +30,7 @@
 
 #include <pbd/xml++.h>
 #include <pbd/replace_all.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/audioengine.h>
 #include <ardour/io.h>

libs/ardour/ladspa_plugin.cc

@@ -33,6 +33,7 @@
 #include <pbd/error.h>
 #include <pbd/pathscanner.h>
 #include <pbd/xml++.h>
+#include <pbd/localeguard.h>
 
 #include <midi++/manager.h>
 
@@ -44,7 +45,6 @@
 #include <pbd/stl_delete.h>
 
 #include "i18n.h"
-#include <locale.h>
 
 using namespace std;
 using namespace ARDOUR;

libs/ardour/lv2_plugin.cc

@@ -29,6 +29,7 @@
 #include <pbd/error.h>
 #include <pbd/pathscanner.h>
 #include <pbd/xml++.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/ardour.h>
 #include <ardour/session.h>

libs/ardour/panner.cc

@@ -33,6 +33,7 @@
 #include <pbd/failed_constructor.h>
 #include <pbd/xml++.h>
 #include <pbd/enumwriter.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/session.h>
 #include <ardour/panner.h>

libs/ardour/session_state.cc

@@ -55,6 +55,7 @@
 #include <pbd/strsplit.h>
 #include <pbd/stacktrace.h>
 #include <pbd/copyfile.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/audioengine.h>
 #include <ardour/configuration.h>

libs/ardour/tempo.cc

@@ -25,7 +25,10 @@
 #include <sigc++/bind.h>
 
 #include <glibmm/thread.h>
+
 #include <pbd/xml++.h>
+#include <pbd/localeguard.h>
+
 #include <ardour/tempo.h>
 #include <ardour/utils.h>
 

libs/ardour/vst_plugin.cc

@@ -40,6 +40,7 @@
 #include <pbd/error.h>
 #include <pbd/pathscanner.h>
 #include <pbd/xml++.h>
+#include <pbd/localeguard.h>
 
 #include <ardour/ardour.h>
 #include <ardour/session.h>

libs/gtkmm2ext/barcontroller.cc

@@ -25,6 +25,7 @@
 #include <algorithm>
 
 #include <pbd/controllable.h>
+#include <pbd/localeguard.h>
 
 #include <gtkmm2ext/gtk_ui.h>
 #include <gtkmm2ext/utils.h>
@@ -108,13 +109,14 @@ BarController::entry_input (double* new_value)
 
 	// extract a double from the string and take its log
 	Entry *entry = dynamic_cast<Entry *>(&spinner);
-	stringstream stream(entry->get_text());
-	stream.imbue(std::locale(""));
 
-	double value;
-	stream >> value;
-	
-	*new_value = log(value);
+	{
+		PBD::LocaleGuard lg (X_("POSIX"));
+		double value;
+		sscanf (entry->get_text().c_str(), "%g", &value);
+		*new_value = log(value);
+	}
+
 	return true;
 }
 
@@ -141,27 +143,17 @@ BarController::entry_output ()
 	string str;
 	size_t found;
 
-	// Gtk.Entry does not like the thousands separator, so we have to  
-	// remove it after conversion from float to string.
+	// Be sure to use POSIX or C locale here so that
+	// we don't end up with commas (as used by some locales)
+	// in the text entry.
 
-	stream.imbue(std::locale(""));
-	stream.precision(spinner.get_digits());
-
-	stream << fixed << exp(spinner.get_adjustment()->get_value());
-	
-	str=stream.str();
-
-	// find thousands separators, remove them
-	found = str.find(use_facet<numpunct<char> >(std::locale("")).thousands_sep());
-	while(found != str.npos) {
-		str.erase(found,1);
-
-		//find next
-		found = str.find(use_facet<numpunct<char> >(std::locale("")).thousands_sep());
+	{
+		PBD::LocaleGuard lg (X_("POSIX"));
+		char buf[128];
+		snprintf (buf, sizeof (buf), "%g", spinner.get_adjustment()->get_value());
+		Entry *entry = dynamic_cast<Entry *>(&spinner);
+		entry->set_text (buf);
 	}
-
-	Entry *entry = dynamic_cast<Entry *>(&spinner);
-	entry->set_text(str);
 	
 	return true;
 }

libs/pbd/SConscript

@@ -29,6 +29,7 @@ dmalloc.cc
 error.cc
 fpu.cc
 id.cc
+localeguard.cc
 mountpoint.cc
 path.cc
 pathscanner.cc

libs/pbd/localeguard.cc

@@ -0,0 +1,21 @@
+#include <cstring>
+#include <locale.h>
+#include <stdlib.h>
+
+#include "pbd/localeguard.h"
+
+PBD::LocaleGuard::LocaleGuard (const char* str)
+{
+	old = strdup (setlocale (LC_NUMERIC, NULL));
+	if (strcmp (old, str)) {
+		setlocale (LC_NUMERIC, str);
+	} 
+}
+
+PBD::LocaleGuard::~LocaleGuard ()
+{
+	setlocale (LC_NUMERIC, old);
+	free ((char*)old);
+}
+
+

libs/pbd/pbd/localeguard.h

@@ -0,0 +1,33 @@
+/*
+    Copyright (C) 1999-2010 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __pbd_localeguard_h__
+#define __pbd_localeguard_h__
+
+namespace PBD {
+
+struct LocaleGuard {
+    LocaleGuard (const char*);
+    ~LocaleGuard ();
+    const char* old;
+};
+
+}; // namespace
+
+#endif /* __pbd_localeguard_h__ */