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// Copyright (c) 2011 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 "base/version.h"
#include <algorithm>
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "base/string_split.h"
#include "base/string_util.h"
Version::Version() {
}
Version::~Version() {
}
Version::Version(const std::string& version_str) {
std::vector<std::string> numbers;
base::SplitString(version_str, '.', &numbers);
if (numbers.empty())
return;
std::vector<uint16> parsed;
for (std::vector<std::string>::iterator i = numbers.begin();
i != numbers.end(); ++i) {
int num;
if (!base::StringToInt(*i, &num))
return;
if (num < 0)
return;
const uint16 max = 0xFFFF;
if (num > max)
return;
// This throws out things like +3, or 032.
if (base::IntToString(num) != *i)
return;
parsed.push_back(static_cast<uint16>(num));
}
components_.swap(parsed);
}
bool Version::IsValid() const {
return (!components_.empty());
}
bool Version::IsOlderThan(const std::string& version_str) const {
Version proposed_ver(version_str);
if (!proposed_ver.IsValid())
return false;
return (CompareTo(proposed_ver) < 0);
}
// TODO(cpu): remove this method.
Version* Version::GetVersionFromString(const std::string& version_str) {
Version* vers = new Version(version_str);
if (vers->IsValid()) {
return vers;
}
delete vers;
return NULL;
}
// TODO(cpu): remove this method.
Version* Version::Clone() const {
DCHECK(IsValid());
return new Version(*this);
}
bool Version::Equals(const Version& that) const {
DCHECK(IsValid());
DCHECK(that.IsValid());
return (CompareTo(that) == 0);
}
int Version::CompareTo(const Version& other) const {
DCHECK(IsValid());
DCHECK(other.IsValid());
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 {
DCHECK(IsValid());
std::string version_str;
size_t count = components_.size();
for (size_t i = 0; i < count - 1; ++i) {
version_str.append(base::IntToString(components_[i]));
version_str.append(".");
}
version_str.append(base::IntToString(components_[count - 1]));
return version_str;
}
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