text: /*
   * Copyright 2012, The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include "Parameters.h"
  
  #include <media/stagefright/MediaErrors.h>
  
  namespace android {
  
  // static
  sp<Parameters> Parameters::Parse(const char *data, size_t size) {
      sp<Parameters> params = new Parameters;
      status_t err = params->parse(data, size);
  
      if (err != OK) {
          return NULL;
      }
  
      return params;
  }
  
  Parameters::Parameters() {}
  
  Parameters::~Parameters() {}
  
  status_t Parameters::parse(const char *data, size_t size) {
      size_t i = 0;
      while (i < size) {
          size_t nameStart = i;
          while (i < size && data[i] != ':') {
              ++i;
          }
  
          if (i == size || i == nameStart) {
              return ERROR_MALFORMED;
          }
  
          AString name(&data[nameStart], i - nameStart);
          name.trim();
          name.tolower();
  
          ++i;
  
          size_t valueStart = i;
  
          while (i + 1 < size && (data[i] != '\r' || data[i + 1] != '\n')) {
              ++i;
          }
  
          AString value(&data[valueStart], i - valueStart);
          value.trim();
  
          mDict.add(name, value);
  
          while (i + 1 < size && data[i] == '\r' && data[i + 1] == '\n') {
              i += 2;
          }
      }
  
      return OK;
  }
  
  bool Parameters::findParameter(const char *name, AString *value) const {
      AString key = name;
      key.tolower();
  
      ssize_t index = mDict.indexOfKey(key);
  
      if (index < 0) {
          value->clear();
  
          return false;
      }
  
      *value = mDict.valueAt(index);
      return true;
  }
  
  }  // namespace android
  