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