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// Copyright 2021 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "testing/scoped_set_tz.h"
#include <stdlib.h>
#include <time.h>
#include "build/build_config.h"
#include "core/fxcrt/check_op.h"
namespace {
constexpr char kTZ[] = "TZ";
#if BUILDFLAG(IS_WIN)
#define SETENV(name, value) _putenv_s(name, value)
#define TZSET _tzset
#define UNSETENV(name) _putenv_s(name, "")
#else
#define SETENV(name, value) setenv(name, value, 1)
#define TZSET tzset
#define UNSETENV(name) unsetenv(name)
#endif
} // namespace
ScopedSetTZ::ScopedSetTZ(const std::string& tz) {
const char* old_tz = getenv(kTZ);
if (old_tz)
old_tz_ = old_tz;
CHECK_EQ(0, SETENV(kTZ, tz.c_str()));
TZSET();
}
ScopedSetTZ::~ScopedSetTZ() {
if (old_tz_.has_value())
CHECK_EQ(0, SETENV(kTZ, old_tz_.value().c_str()));
else
CHECK_EQ(0, UNSETENV(kTZ));
TZSET();
}