/*
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* Copyright 2015 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrAutoLocaleSetter_DEFINED
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#define GrAutoLocaleSetter_DEFINED
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#include "GrTypes.h"
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#include "SkNoncopyable.h"
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#if defined(SK_BUILD_FOR_WIN)
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#include "SkString.h"
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#endif
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#if !defined(SK_BUILD_FOR_ANDROID)
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#include <locale.h>
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#endif
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#if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
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#include <xlocale.h>
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#include <cstring>
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#define HAVE_XLOCALE 1
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#else
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#define HAVE_XLOCALE 0
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#endif
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#if defined(SK_BUILD_FOR_ANDROID) || defined(__UCLIBC__) || defined(_NEWLIB_VERSION)
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#define HAVE_LOCALE_T 0
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#else
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#define HAVE_LOCALE_T 1
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#endif
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/**
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* Helper class for ensuring that we don't use the wrong locale when building shaders. Android
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* doesn't support locale in the NDK, so this is a no-op there.
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*/
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class GrAutoLocaleSetter : public SkNoncopyable {
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public:
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GrAutoLocaleSetter (const char* name) {
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#if defined(SK_BUILD_FOR_WIN)
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fOldPerThreadLocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
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char* oldLocale = setlocale(LC_ALL, name);
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if (oldLocale) {
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fOldLocale = oldLocale;
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fShouldRestoreLocale = true;
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} else {
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fShouldRestoreLocale = false;
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}
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#elif HAVE_LOCALE_T
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#if HAVE_XLOCALE
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// In xlocale nullptr means the C locale.
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if (0 == strcmp(name, "C")) {
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name = nullptr;
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}
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#endif
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fLocale = newlocale(LC_ALL_MASK, name, nullptr);
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if (fLocale) {
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fOldLocale = uselocale(fLocale);
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} else {
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fOldLocale = static_cast<locale_t>(nullptr);
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}
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#else
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(void) name; // suppress unused param warning.
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#endif
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}
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~GrAutoLocaleSetter () {
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#if defined(SK_BUILD_FOR_WIN)
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if (fShouldRestoreLocale) {
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setlocale(LC_ALL, fOldLocale.c_str());
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}
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_configthreadlocale(fOldPerThreadLocale);
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#elif HAVE_LOCALE_T
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if (fLocale) {
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uselocale(fOldLocale);
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freelocale(fLocale);
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}
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#endif
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}
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private:
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#if defined(SK_BUILD_FOR_WIN)
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int fOldPerThreadLocale;
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bool fShouldRestoreLocale;
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SkString fOldLocale;
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#elif HAVE_LOCALE_T
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locale_t fOldLocale;
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locale_t fLocale;
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#endif
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};
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#undef HAVE_LOCALE_T
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#undef HAVE_XLOCALE
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#endif
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