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// Copyright (c) 2009 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 <vector>
#include "base/string_util.h"
#include "base/version.h"
// static
Version* Version::GetVersionFromString(const std::wstring& version_str) {
if (!IsStringASCII(version_str))
return NULL;
return GetVersionFromString(WideToASCII(version_str));
}
// static
Version* Version::GetVersionFromString(const std::string& version_str) {
Version* vers = new Version();
if (vers->InitFromString(version_str))
return vers;
delete vers;
return NULL;
}
bool Version::Equals(const Version& that) const {
return CompareTo(that) == 0;
}
int Version::CompareTo(const Version& other) const {
std::vector<uint16> other_components = other.components();
size_t count = std::min(components_.size(), other_components.size());
for (size_t i = 0; i < count; ++i) {
if (components_[i] > other_components[i])
return 1;
if (components_[i] < other_components[i])
return -1;
}
if (components_.size() > other_components.size()) {
for (size_t i = count; i < components_.size(); ++i)
if (components_[i] > 0)
return 1;
} else if (components_.size() < other_components.size()) {
for (size_t i = count; i < other_components.size(); ++i)
if (other_components[i] > 0)
return -1;
}
return 0;
}
const std::string Version::GetString() const {
std::string version_str;
int count = components_.size();
for (int i = 0; i < count - 1; ++i) {
version_str.append(IntToString(components_[i]));
version_str.append(".");
}
version_str.append(IntToString(components_[count - 1]));
return version_str;
}
bool Version::InitFromString(const std::string& version_str) {
std::vector<std::string> numbers;
SplitString(version_str, '.', &numbers);
for (std::vector<std::string>::iterator i = numbers.begin();
i != numbers.end(); ++i) {
int num;
if (!StringToInt(*i, &num))
return false;
if (num < 0)
return false;
const uint16 max = 0xFFFF;
if (num > max)
return false;
// This throws out things like +3, or 032.
if (IntToString(num) != *i)
return false;
uint16 component = static_cast<uint16>(num);
components_.push_back(component);
}
return true;
}
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