remoting/base/capabilities.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "remoting/base/capabilities.h"
   6
   7 #include <algorithm>
   8 #include <vector>
   9
  10 #include "base/stl_util.h"
  11 #include "base/strings/string_split.h"
  12 #include "base/strings/string_util.h"
  13
  14 namespace remoting {
  15
  16 bool HasCapability(const std::string& capabilities, const std::string& key) {
  17   std::vector<base::StringPiece> caps = base::SplitStringPiece(
  18       capabilities, " ", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
  19   return std::find(caps.begin(), caps.end(), base::StringPiece(key)) !=
  20          caps.end();
  21 }
  22
  23 std::string IntersectCapabilities(const std::string& client_capabilities,
  24                                   const std::string& host_capabilities) {
  25   std::vector<std::string> client_caps = base::SplitString(
  26       client_capabilities, " ", base::KEEP_WHITESPACE,
  27       base::SPLIT_WANT_NONEMPTY);
  28   std::sort(client_caps.begin(), client_caps.end());
  29
  30   std::vector<std::string> host_caps = base::SplitString(
  31         host_capabilities, " ", base::KEEP_WHITESPACE,
  32         base::SPLIT_WANT_NONEMPTY);
  33   std::sort(host_caps.begin(), host_caps.end());
  34
  35   std::vector<std::string> result =
  36       base::STLSetIntersection<std::vector<std::string> >(
  37           client_caps, host_caps);
  38
  39   return base::JoinString(result, " ");
  40 }
  41
  42 }  // namespace remoting