Function ParseDebugString

src/utils/string_util.cc:71–132

}

bool ParseDebugString(const std::string& src, std::string* dst) {
  size_t src_len = src.size();
  std::string tmp;
  tmp.resize(src_len);

  int state = 0;  // 0: normal, 1: \, 2: \x, 3: \x[0-9a-fAZ-F]
  char bin_char = 0;
  size_t j = 0;
  for (size_t i = 0; i < src_len; i++) {
    uint8_t c = src[i];
    if (!IsVisible(c) && !isspace(c)) {
      return false;
    }
    switch (state) {
      case 0:
        if (c == '\\') {
          state = 1;
        } else {
          tmp[j++] = c;
        }
        break;
      case 1:
        if (c == 'x') {
          state = 2;
        } else if (c == '\\') {
          tmp[j++] = '\\';
          state = 0;
        } else {
          return false;
        }
        break;
      case 2:
        if (!IsHex(c)) {
          return false;
        } else {
          bin_char |= (ToBinary(c) << 4);
          state = 3;
        }
        break;
      case 3:
        if (!IsHex(c)) {
          return false;
        } else {
          bin_char |= ToBinary(c) & 0xF;
          tmp[j++] = bin_char;
          bin_char = 0;
          state = 0;
        }
        break;
      default:
        abort();
        break;
    }
  }

  if (state != 0) {
    return false;
  }