update bundled_deps

bundled_deps/localesutils/LocalesUtils.hpp

@@ -0,0 +1,68 @@
+#ifndef slic3r_LocalesUtils_hpp_
+#define slic3r_LocalesUtils_hpp_
+
+#include <string>
+#include <clocale>
+#include <iomanip>
+#include <cassert>
+#include <string_view>
+
+#ifdef __APPLE__
+#include <xlocale.h>
+#endif
+
+namespace Slic3r {
+
+// RAII wrapper that sets LC_NUMERIC to "C" on construction
+// and restores the old value on destruction.
+class CNumericLocalesSetter {
+public:
+    CNumericLocalesSetter();
+    ~CNumericLocalesSetter();
+
+private:
+#ifdef _WIN32
+    std::string m_orig_numeric_locale;
+#else
+    locale_t m_original_locale;
+    locale_t m_new_locale;
+#endif
+
+};
+
+// A function to check that current C locale uses decimal point as a separator.
+// Intended mostly for asserts.
+bool is_decimal_separator_point();
+
+
+// A substitute for std::to_string that works according to
+// C++ locales, not C locale. Meant to be used when we need
+// to be sure that decimal point is used as a separator.
+// (We use user C locales and "C" C++ locales in most of the code.)
+std::string float_to_string_decimal_point(double value, int precision = -1);
+//std::string float_to_string_decimal_point(float value,  int precision = -1);
+double string_to_double_decimal_point(const std::string_view str, size_t* pos = nullptr);
+float  string_to_float_decimal_point (const std::string_view str, size_t* pos = nullptr);
+
+// Set locales to "C".
+inline void set_c_locales()
+{
+#ifdef _WIN32
+    _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
+    std::setlocale(LC_ALL, "C");
+#else
+    // We are leaking some memory here, because the newlocale() produced memory will never be released.
+    // This is not a problem though, as there will be a maximum one worker thread created per physical thread.
+    uselocale(newlocale(
+#ifdef __APPLE__
+        LC_ALL_MASK
+#else // some Unix / Linux / BSD
+        LC_ALL
+#endif
+        , "C", nullptr));
+#endif
+}
+
+} // namespace Slic3r
+
+#endif // slic3r_LocalesUtils_hpp_