Example #1
0
File: Conv.cpp Project: Aj0Ay/folly
bool str_to_bool(StringPiece* src) {
  auto b = src->begin(), e = src->end();
  for (;; ++b) {
    FOLLY_RANGE_CHECK_STRINGPIECE(
      b < e, "No non-whitespace characters found in input string", *src);
    if (!isspace(*b)) break;
  }

  bool result;
  size_t len = e - b;
  switch (*b) {
    case '0':
    case '1': {
      result = false;
      for (; b < e && isdigit(*b); ++b) {
        FOLLY_RANGE_CHECK_STRINGPIECE(
          !result && (*b == '0' || *b == '1'),
          "Integer overflow when parsing bool: must be 0 or 1", *src);
        result = (*b == '1');
      }
      break;
    }
    case 'y':
    case 'Y':
      result = true;
      if (!bool_str_cmp(&b, len, "yes")) {
        ++b;  // accept the single 'y' character
      }
      break;
    case 'n':
    case 'N':
      result = false;
      if (!bool_str_cmp(&b, len, "no")) {
        ++b;
      }
      break;
    case 't':
    case 'T':
      result = true;
      if (!bool_str_cmp(&b, len, "true")) {
        ++b;
      }
      break;
    case 'f':
    case 'F':
      result = false;
      if (!bool_str_cmp(&b, len, "false")) {
        ++b;
      }
      break;
    case 'o':
    case 'O':
      if (bool_str_cmp(&b, len, "on")) {
        result = true;
      } else if (bool_str_cmp(&b, len, "off")) {
        result = false;
      } else {
        FOLLY_RANGE_CHECK_STRINGPIECE(false, "Invalid value for bool", *src);
      }
      break;
    default:
      FOLLY_RANGE_CHECK_STRINGPIECE(false, "Invalid value for bool", *src);
  }

  src->assign(b, e);
  return result;
}
Example #2
0
bool str_to_bool(StringPiece* src) {
  auto b = src->begin(), e = src->end();
  for (;; ++b) {
    FOLLY_RANGE_CHECK(b < e,
                      "No non-whitespace characters found in input string");
    if (!isspace(*b)) break;
  }

  bool result;
  size_t len = e - b;
  switch (*b) {
    case '0':
    case '1': {
      // Attempt to parse the value as an integer
      StringPiece tmp(*src);
      uint8_t value = to<uint8_t>(&tmp);
      // Only accept 0 or 1
      FOLLY_RANGE_CHECK(value <= 1,
                        "Integer overflow when parsing bool: must be 0 or 1");
      b = tmp.begin();
      result = (value == 1);
      break;
    }
    case 'y':
    case 'Y':
      result = true;
      if (!bool_str_cmp(&b, len, "yes")) {
        ++b;  // accept the single 'y' character
      }
      break;
    case 'n':
    case 'N':
      result = false;
      if (!bool_str_cmp(&b, len, "no")) {
        ++b;
      }
      break;
    case 't':
    case 'T':
      result = true;
      if (!bool_str_cmp(&b, len, "true")) {
        ++b;
      }
      break;
    case 'f':
    case 'F':
      result = false;
      if (!bool_str_cmp(&b, len, "false")) {
        ++b;
      }
      break;
    case 'o':
    case 'O':
      if (bool_str_cmp(&b, len, "on")) {
        result = true;
      } else if (bool_str_cmp(&b, len, "off")) {
        result = false;
      } else {
        FOLLY_RANGE_CHECK(false, "Invalid value for bool");
      }
      break;
    default:
      FOLLY_RANGE_CHECK(false, "Invalid value for bool");
  }

  src->assign(b, e);
  return result;
}