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