henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2008 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "webrtc/base/optionsfile.h" |
| 12 | |
| 13 | #include <ctype.h> |
| 14 | |
| 15 | #include "webrtc/base/logging.h" |
| 16 | #include "webrtc/base/stream.h" |
| 17 | #include "webrtc/base/stringencode.h" |
| 18 | |
| 19 | namespace rtc { |
| 20 | |
| 21 | OptionsFile::OptionsFile(const std::string &path) : path_(path) { |
| 22 | } |
| 23 | |
| 24 | bool OptionsFile::Load() { |
| 25 | options_.clear(); |
| 26 | // Open file. |
| 27 | FileStream stream; |
| 28 | int err; |
| 29 | if (!stream.Open(path_, "r", &err)) { |
| 30 | LOG_F(LS_WARNING) << "Could not open file, err=" << err; |
| 31 | // We do not consider this an error because we expect there to be no file |
| 32 | // until the user saves a setting. |
| 33 | return true; |
| 34 | } |
| 35 | // Read in all its data. |
| 36 | std::string line; |
| 37 | StreamResult res; |
| 38 | for (;;) { |
| 39 | res = stream.ReadLine(&line); |
| 40 | if (res != SR_SUCCESS) { |
| 41 | break; |
| 42 | } |
| 43 | size_t equals_pos = line.find('='); |
| 44 | if (equals_pos == std::string::npos) { |
| 45 | // We do not consider this an error. Instead we ignore the line and |
| 46 | // keep going. |
| 47 | LOG_F(LS_WARNING) << "Ignoring malformed line in " << path_; |
| 48 | continue; |
| 49 | } |
| 50 | std::string key(line, 0, equals_pos); |
| 51 | std::string value(line, equals_pos + 1, line.length() - (equals_pos + 1)); |
| 52 | options_[key] = value; |
| 53 | } |
| 54 | if (res != SR_EOS) { |
| 55 | LOG_F(LS_ERROR) << "Error when reading from file"; |
| 56 | return false; |
| 57 | } else { |
| 58 | return true; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | bool OptionsFile::Save() { |
| 63 | // Open file. |
| 64 | FileStream stream; |
| 65 | int err; |
| 66 | if (!stream.Open(path_, "w", &err)) { |
| 67 | LOG_F(LS_ERROR) << "Could not open file, err=" << err; |
| 68 | return false; |
| 69 | } |
| 70 | // Write out all the data. |
| 71 | StreamResult res = SR_SUCCESS; |
| 72 | size_t written; |
| 73 | int error; |
| 74 | for (OptionsMap::const_iterator i = options_.begin(); i != options_.end(); |
| 75 | ++i) { |
| 76 | res = stream.WriteAll(i->first.c_str(), i->first.length(), &written, |
| 77 | &error); |
| 78 | if (res != SR_SUCCESS) { |
| 79 | break; |
| 80 | } |
| 81 | res = stream.WriteAll("=", 1, &written, &error); |
| 82 | if (res != SR_SUCCESS) { |
| 83 | break; |
| 84 | } |
| 85 | res = stream.WriteAll(i->second.c_str(), i->second.length(), &written, |
| 86 | &error); |
| 87 | if (res != SR_SUCCESS) { |
| 88 | break; |
| 89 | } |
| 90 | res = stream.WriteAll("\n", 1, &written, &error); |
| 91 | if (res != SR_SUCCESS) { |
| 92 | break; |
| 93 | } |
| 94 | } |
| 95 | if (res != SR_SUCCESS) { |
| 96 | LOG_F(LS_ERROR) << "Unable to write to file"; |
| 97 | return false; |
| 98 | } else { |
| 99 | return true; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | bool OptionsFile::IsLegalName(const std::string &name) { |
| 104 | for (size_t pos = 0; pos < name.length(); ++pos) { |
| 105 | if (name[pos] == '\n' || name[pos] == '\\' || name[pos] == '=') { |
| 106 | // Illegal character. |
| 107 | LOG(LS_WARNING) << "Ignoring operation for illegal option " << name; |
| 108 | return false; |
| 109 | } |
| 110 | } |
| 111 | return true; |
| 112 | } |
| 113 | |
| 114 | bool OptionsFile::IsLegalValue(const std::string &value) { |
| 115 | for (size_t pos = 0; pos < value.length(); ++pos) { |
| 116 | if (value[pos] == '\n' || value[pos] == '\\') { |
| 117 | // Illegal character. |
| 118 | LOG(LS_WARNING) << "Ignoring operation for illegal value " << value; |
| 119 | return false; |
| 120 | } |
| 121 | } |
| 122 | return true; |
| 123 | } |
| 124 | |
| 125 | bool OptionsFile::GetStringValue(const std::string& option, |
| 126 | std::string *out_val) const { |
| 127 | LOG(LS_VERBOSE) << "OptionsFile::GetStringValue " |
| 128 | << option; |
| 129 | if (!IsLegalName(option)) { |
| 130 | return false; |
| 131 | } |
| 132 | OptionsMap::const_iterator i = options_.find(option); |
| 133 | if (i == options_.end()) { |
| 134 | return false; |
| 135 | } |
| 136 | *out_val = i->second; |
| 137 | return true; |
| 138 | } |
| 139 | |
| 140 | bool OptionsFile::GetIntValue(const std::string& option, |
| 141 | int *out_val) const { |
| 142 | LOG(LS_VERBOSE) << "OptionsFile::GetIntValue " |
| 143 | << option; |
| 144 | if (!IsLegalName(option)) { |
| 145 | return false; |
| 146 | } |
| 147 | OptionsMap::const_iterator i = options_.find(option); |
| 148 | if (i == options_.end()) { |
| 149 | return false; |
| 150 | } |
| 151 | return FromString(i->second, out_val); |
| 152 | } |
| 153 | |
| 154 | bool OptionsFile::SetStringValue(const std::string& option, |
| 155 | const std::string& value) { |
| 156 | LOG(LS_VERBOSE) << "OptionsFile::SetStringValue " |
| 157 | << option << ":" << value; |
| 158 | if (!IsLegalName(option) || !IsLegalValue(value)) { |
| 159 | return false; |
| 160 | } |
| 161 | options_[option] = value; |
| 162 | return true; |
| 163 | } |
| 164 | |
| 165 | bool OptionsFile::SetIntValue(const std::string& option, |
| 166 | int value) { |
| 167 | LOG(LS_VERBOSE) << "OptionsFile::SetIntValue " |
| 168 | << option << ":" << value; |
| 169 | if (!IsLegalName(option)) { |
| 170 | return false; |
| 171 | } |
| 172 | return ToString(value, &options_[option]); |
| 173 | } |
| 174 | |
| 175 | bool OptionsFile::RemoveValue(const std::string& option) { |
| 176 | LOG(LS_VERBOSE) << "OptionsFile::RemoveValue " << option; |
| 177 | if (!IsLegalName(option)) { |
| 178 | return false; |
| 179 | } |
| 180 | options_.erase(option); |
| 181 | return true; |
| 182 | } |
| 183 | |
| 184 | } // namespace rtc |