Fixed a memory leak during locales switching on macOS and

removed frequent locales switching during gcode processing

src/libslic3r/GCode.cpp

@@ -720,6 +720,8 @@ void GCode::do_export(Print* print, const char* path, GCodeProcessor::Result* re
 {
     PROFILE_CLEAR();
 
+    CNumericLocalesSetter locales_setter;
+
     // Does the file exist? If so, we hope that it is still valid.
     if (print->is_step_done(psGCodeExport) && boost::filesystem::exists(boost::filesystem::path(path)))
         return;
@@ -750,7 +752,6 @@ void GCode::do_export(Print* print, const char* path, GCodeProcessor::Result* re
     std::string path_tmp(path);
     path_tmp += ".tmp";
 
-    CNumericLocalesSetter c_locales_setter;
     FILE *file = boost::nowide::fopen(path_tmp.c_str(), "wb");
     if (file == nullptr)
         throw Slic3r::RuntimeError(std::string("G-code export to ") + path + " failed.\nCannot open the file for writing.\n");

src/libslic3r/GCode/GCodeProcessor.cpp

@@ -1257,6 +1257,8 @@ void GCodeProcessor::process_file(const std::string& filename, bool apply_postpr
 {
     auto last_cancel_callback_time = std::chrono::high_resolution_clock::now();
 
+    CNumericLocalesSetter locales_setter;
+
 #if ENABLE_GCODE_VIEWER_STATISTICS
     auto start_time = std::chrono::high_resolution_clock::now();
 #endif // ENABLE_GCODE_VIEWER_STATISTICS

src/libslic3r/GCodeReader.cpp

@@ -27,7 +27,8 @@ void GCodeReader::apply_config(const DynamicPrintConfig &config)
 const char* GCodeReader::parse_line_internal(const char *ptr, GCodeLine &gline, std::pair<const char*, const char*> &command)
 {
     PROFILE_FUNC();
-    CNumericLocalesSetter locales_setter; // for strtod
+
+    assert(is_decimal_separator_point());
     
     // command and args
     const char *c = ptr;
@@ -153,7 +154,7 @@ bool GCodeReader::GCodeLine::has(char axis) const
 
 bool GCodeReader::GCodeLine::has_value(char axis, float &value) const
 {
-    CNumericLocalesSetter locales_setter; // for strtod
+    assert(is_decimal_separator_point());
     const char *c = m_raw.c_str();
     // Skip the whitespaces.
     c = skip_whitespaces(c);

src/libslic3r/LocalesUtils.cpp

@@ -11,11 +11,14 @@ CNumericLocalesSetter::CNumericLocalesSetter()
     _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
     m_orig_numeric_locale = std::setlocale(LC_NUMERIC, nullptr);
     std::setlocale(LC_NUMERIC, "C");
-#else
+#elif __linux__
     m_original_locale = uselocale((locale_t)0);
     m_new_locale = duplocale(m_original_locale);
     m_new_locale = newlocale(LC_NUMERIC_MASK, "C", m_new_locale);
     uselocale(m_new_locale);
+#else // APPLE
+    m_original_locale = uselocale((locale_t)0);
+    m_new_locale = newlocale(LC_NUMERIC_MASK, "C", m_original_locale);
 #endif
 }
 
@@ -58,7 +61,6 @@ double string_to_double_decimal_point(const std::string& str, size_t* pos /* = n
 
 std::string float_to_string_decimal_point(double value, int precision/* = -1*/)
 {
-    assert(is_decimal_separator_point());
     std::stringstream buf;
     if (precision >= 0)
         buf << std::fixed << std::setprecision(precision);
@@ -66,11 +68,6 @@ std::string float_to_string_decimal_point(double value, int precision/* = -1*/)
     return buf.str();
 }
 
-//std::string float_to_string_decimal_point(float value, int precision/* = -1*/)
-//{
-//    return float_to_string_decimal_point(double(value), precision);
-//}
-
 
 } // namespace Slic3r