Adds a modified copy of talk/base to webrtc/base. It is the first step in migrating talk/base to webrtc/base.

BUG=N/A
R=andrew@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12199004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6107 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/base/optionsfile.cc

@@ -0,0 +1,184 @@
+/*
+ *  Copyright 2008 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/optionsfile.h"
+
+#include <ctype.h>
+
+#include "webrtc/base/logging.h"
+#include "webrtc/base/stream.h"
+#include "webrtc/base/stringencode.h"
+
+namespace rtc {
+
+OptionsFile::OptionsFile(const std::string &path) : path_(path) {
+}
+
+bool OptionsFile::Load() {
+  options_.clear();
+  // Open file.
+  FileStream stream;
+  int err;
+  if (!stream.Open(path_, "r", &err)) {
+    LOG_F(LS_WARNING) << "Could not open file, err=" << err;
+    // We do not consider this an error because we expect there to be no file
+    // until the user saves a setting.
+    return true;
+  }
+  // Read in all its data.
+  std::string line;
+  StreamResult res;
+  for (;;) {
+    res = stream.ReadLine(&line);
+    if (res != SR_SUCCESS) {
+      break;
+    }
+    size_t equals_pos = line.find('=');
+    if (equals_pos == std::string::npos) {
+      // We do not consider this an error. Instead we ignore the line and
+      // keep going.
+      LOG_F(LS_WARNING) << "Ignoring malformed line in " << path_;
+      continue;
+    }
+    std::string key(line, 0, equals_pos);
+    std::string value(line, equals_pos + 1, line.length() - (equals_pos + 1));
+    options_[key] = value;
+  }
+  if (res != SR_EOS) {
+    LOG_F(LS_ERROR) << "Error when reading from file";
+    return false;
+  } else {
+    return true;
+  }
+}
+
+bool OptionsFile::Save() {
+  // Open file.
+  FileStream stream;
+  int err;
+  if (!stream.Open(path_, "w", &err)) {
+    LOG_F(LS_ERROR) << "Could not open file, err=" << err;
+    return false;
+  }
+  // Write out all the data.
+  StreamResult res = SR_SUCCESS;
+  size_t written;
+  int error;
+  for (OptionsMap::const_iterator i = options_.begin(); i != options_.end();
+       ++i) {
+    res = stream.WriteAll(i->first.c_str(), i->first.length(), &written,
+        &error);
+    if (res != SR_SUCCESS) {
+      break;
+    }
+    res = stream.WriteAll("=", 1, &written, &error);
+    if (res != SR_SUCCESS) {
+      break;
+    }
+    res = stream.WriteAll(i->second.c_str(), i->second.length(), &written,
+        &error);
+    if (res != SR_SUCCESS) {
+      break;
+    }
+    res = stream.WriteAll("\n", 1, &written, &error);
+    if (res != SR_SUCCESS) {
+      break;
+    }
+  }
+  if (res != SR_SUCCESS) {
+    LOG_F(LS_ERROR) << "Unable to write to file";
+    return false;
+  } else {
+    return true;
+  }
+}
+
+bool OptionsFile::IsLegalName(const std::string &name) {
+  for (size_t pos = 0; pos < name.length(); ++pos) {
+    if (name[pos] == '\n' || name[pos] == '\\' || name[pos] == '=') {
+      // Illegal character.
+      LOG(LS_WARNING) << "Ignoring operation for illegal option " << name;
+      return false;
+    }
+  }
+  return true;
+}
+
+bool OptionsFile::IsLegalValue(const std::string &value) {
+  for (size_t pos = 0; pos < value.length(); ++pos) {
+    if (value[pos] == '\n' || value[pos] == '\\') {
+      // Illegal character.
+      LOG(LS_WARNING) << "Ignoring operation for illegal value " << value;
+      return false;
+    }
+  }
+  return true;
+}
+
+bool OptionsFile::GetStringValue(const std::string& option,
+                                 std::string *out_val) const {
+  LOG(LS_VERBOSE) << "OptionsFile::GetStringValue "
+                  << option;
+  if (!IsLegalName(option)) {
+    return false;
+  }
+  OptionsMap::const_iterator i = options_.find(option);
+  if (i == options_.end()) {
+    return false;
+  }
+  *out_val = i->second;
+  return true;
+}
+
+bool OptionsFile::GetIntValue(const std::string& option,
+                              int *out_val) const {
+  LOG(LS_VERBOSE) << "OptionsFile::GetIntValue "
+                  << option;
+  if (!IsLegalName(option)) {
+    return false;
+  }
+  OptionsMap::const_iterator i = options_.find(option);
+  if (i == options_.end()) {
+    return false;
+  }
+  return FromString(i->second, out_val);
+}
+
+bool OptionsFile::SetStringValue(const std::string& option,
+                                 const std::string& value) {
+  LOG(LS_VERBOSE) << "OptionsFile::SetStringValue "
+                  << option << ":" << value;
+  if (!IsLegalName(option) || !IsLegalValue(value)) {
+    return false;
+  }
+  options_[option] = value;
+  return true;
+}
+
+bool OptionsFile::SetIntValue(const std::string& option,
+                              int value) {
+  LOG(LS_VERBOSE) << "OptionsFile::SetIntValue "
+                  << option << ":" << value;
+  if (!IsLegalName(option)) {
+    return false;
+  }
+  return ToString(value, &options_[option]);
+}
+
+bool OptionsFile::RemoveValue(const std::string& option) {
+  LOG(LS_VERBOSE) << "OptionsFile::RemoveValue " << option;
+  if (!IsLegalName(option)) {
+    return false;
+  }
+  options_.erase(option);
+  return true;
+}
+
+}  // namespace rtc