C++ (Cpp) OptionMap::size示例

示例#1

    /// Utility function to adjust option strings, used by ToNormalised()/ToCustomised().
    bool AdjustOptions(void * parm, unsigned * parmLen, bool (PluginCodec_MediaFormat:: * adjuster)(OptionMap & original, OptionMap & changed))
    {
      if (parmLen == NULL || parm == NULL || *parmLen != sizeof(char ***)) {
        PTRACE(1, "Plugin", "Invalid parameters to AdjustOptions.");
        return false;
      }

      OptionMap originalOptions;
      for (const char * const * option = *(const char * const * *)parm; *option != NULL; option += 2)
        originalOptions[option[0]] = option[1];

      OptionMap changedOptions;
      if (!(this->*adjuster)(originalOptions, changedOptions)) {
        PTRACE(1, "Plugin", "Could not normalise/customise options.");
        return false;
      }

      char ** options = (char **)calloc(changedOptions.size()*2+1, sizeof(char *));
      *(char ***)parm = options;
      if (options == NULL) {
        PTRACE(1, "Plugin", "Could not allocate new option lists.");
        return false;
      }

      for (OptionMap::iterator i = changedOptions.begin(); i != changedOptions.end(); ++i) {
        *options++ = strdup(i->first.c_str());
        *options++ = strdup(i->second.c_str());
      }

      return true;
    }