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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/installer/util/channel_info.h"
#include "base/logging.h"
#include "base/win/registry.h"
#include "chrome/installer/util/google_update_constants.h"
using base::win::RegKey;
namespace {
const wchar_t kChannelBeta[] = L"beta";
const wchar_t kChannelDev[] = L"dev";
const wchar_t kModCeee[] = L"-CEEE";
const wchar_t kModChrome[] = L"-chrome";
const wchar_t kModChromeFrame[] = L"-chromeframe";
const wchar_t kModMultiInstall[] = L"-multi";
const wchar_t kModReadyMode[] = L"-readymode";
const wchar_t kSfxFull[] = L"-full";
const wchar_t kSfxMultiFail[] = L"-multifail";
const wchar_t* const kChannels[] = {
kChannelBeta,
kChannelDev
};
const wchar_t* const kModifiers[] = {
kModMultiInstall,
kModChrome,
kModChromeFrame,
kModCeee,
kModReadyMode,
kSfxMultiFail,
kSfxFull
};
enum ModifierIndex {
MOD_MULTI_INSTALL,
MOD_CHROME,
MOD_CHROME_FRAME,
MOD_CEEE,
MOD_READY_MODE,
SFX_MULTI_FAIL,
SFX_FULL,
NUM_MODIFIERS
};
COMPILE_ASSERT(NUM_MODIFIERS == arraysize(kModifiers),
kModifiers_disagrees_with_ModifierIndex_comma_they_must_match_bang);
// Returns true if the modifier is found, in which case |position| holds the
// location at which the modifier was found.
bool FindModifier(ModifierIndex index,
const std::wstring& ap_value,
std::wstring::size_type* position) {
DCHECK(position != NULL);
std::wstring::size_type mod_length =
std::wstring::traits_type::length(kModifiers[index]);
for (std::wstring::size_type pos = 0; ; ) {
*position = ap_value.find(kModifiers[index], pos, mod_length);
if (*position == std::wstring::npos)
break;
// The modifier must be either at the end of the string or followed by -.
pos = *position + mod_length;
if (pos == ap_value.size() || ap_value[pos] == L'-')
return true;
}
return false;
}
bool HasModifier(ModifierIndex index, const std::wstring& ap_value) {
DCHECK(index >= 0 && index < NUM_MODIFIERS);
std::wstring::size_type position;
return FindModifier(index, ap_value, &position);
}
std::wstring::size_type FindInsertionPoint(ModifierIndex index,
const std::wstring& ap_value) {
// Return the location of the next modifier.
std::wstring::size_type result;
for (int scan = index + 1; scan < NUM_MODIFIERS; ++scan) {
if (FindModifier(static_cast<ModifierIndex>(scan), ap_value, &result))
return result;
}
return ap_value.size();
}
// Returns true if |ap_value| is modified.
bool SetModifier(ModifierIndex index, bool set, std::wstring* ap_value) {
DCHECK(index >= 0 && index < NUM_MODIFIERS);
DCHECK(ap_value);
std::wstring::size_type position;
bool have_modifier = FindModifier(index, *ap_value, &position);
if (set) {
if (!have_modifier) {
ap_value->insert(FindInsertionPoint(index, *ap_value), kModifiers[index]);
return true;
}
} else {
if (have_modifier) {
ap_value->erase(position,
std::wstring::traits_type::length(kModifiers[index]));
return true;
}
}
return false;
}
} // namespace
namespace installer {
bool ChannelInfo::Initialize(const RegKey& key) {
return (key.ReadValue(google_update::kRegApField, &value_) == ERROR_SUCCESS);
}
bool ChannelInfo::Write(RegKey* key) const {
return (key->WriteValue(google_update::kRegApField, value_.c_str()) ==
ERROR_SUCCESS);
}
bool ChannelInfo::GetChannelName(std::wstring* channel_name) const {
DCHECK(channel_name);
if (value_.empty()) {
channel_name->erase();
return true;
} else {
for (const wchar_t* const* scan = &kChannels[0],
*const* end = &kChannels[arraysize(kChannels)]; scan != end;
++scan) {
if (value_.find(*scan) != std::wstring::npos) {
channel_name->assign(*scan);
return true;
}
}
// There may be modifiers present. Strip them off and see if we're left
// with the empty string (stable channel).
std::wstring tmp_value = value_;
for (int i = 0; i != NUM_MODIFIERS; ++i) {
SetModifier(static_cast<ModifierIndex>(i), false, &tmp_value);
}
if (tmp_value.empty()) {
channel_name->erase();
return true;
}
}
return false;
}
bool ChannelInfo::IsCeee() const {
return HasModifier(MOD_CEEE, value_);
}
bool ChannelInfo::SetCeee(bool value) {
return SetModifier(MOD_CEEE, value, &value_);
}
bool ChannelInfo::IsChrome() const {
return HasModifier(MOD_CHROME, value_);
}
bool ChannelInfo::SetChrome(bool value) {
return SetModifier(MOD_CHROME, value, &value_);
}
bool ChannelInfo::IsChromeFrame() const {
return HasModifier(MOD_CHROME_FRAME, value_);
}
bool ChannelInfo::SetChromeFrame(bool value) {
return SetModifier(MOD_CHROME_FRAME, value, &value_);
}
bool ChannelInfo::IsMultiInstall() const {
return HasModifier(MOD_MULTI_INSTALL, value_);
}
bool ChannelInfo::SetMultiInstall(bool value) {
return SetModifier(MOD_MULTI_INSTALL, value, &value_);
}
bool ChannelInfo::IsReadyMode() const {
return HasModifier(MOD_READY_MODE, value_);
}
bool ChannelInfo::SetReadyMode(bool value) {
return SetModifier(MOD_READY_MODE, value, &value_);
}
bool ChannelInfo::HasFullSuffix() const {
return HasModifier(SFX_FULL, value_);
}
bool ChannelInfo::SetFullSuffix(bool value) {
return SetModifier(SFX_FULL, value, &value_);
}
bool ChannelInfo::HasMultiFailSuffix() const {
return HasModifier(SFX_MULTI_FAIL, value_);
}
bool ChannelInfo::SetMultiFailSuffix(bool value) {
return SetModifier(SFX_MULTI_FAIL, value, &value_);
}
} // namespace installer
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