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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/base/versionparsing.h"
#include <stdlib.h>
namespace rtc {
bool ParseVersionString(const std::string& version_str,
int num_expected_segments,
int version[]) {
size_t pos = 0;
for (int i = 0;;) {
size_t dot_pos = version_str.find('.', pos);
size_t n;
if (dot_pos == std::string::npos) {
// npos here is a special value meaning "to the end of the string"
n = std::string::npos;
} else {
n = dot_pos - pos;
}
version[i] = atoi(version_str.substr(pos, n).c_str());
if (++i >= num_expected_segments) break;
if (dot_pos == std::string::npos) {
// Previous segment was not terminated by a dot, but there's supposed to
// be more segments, so that's an error.
return false;
}
pos = dot_pos + 1;
}
return true;
}
int CompareVersions(const int version1[],
const int version2[],
int num_segments) {
for (int i = 0; i < num_segments; ++i) {
int diff = version1[i] - version2[i];
if (diff != 0) {
return diff;
}
}
return 0;
}
} // namespace rtc
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