'use strict';

Object.defineProperty(exports, '__esModule', {
  value: true,
});
exports.readCodePoint = readCodePoint;
exports.readInt = readInt;
exports.readStringContents = readStringContents;
var _isDigit = function isDigit(code) {
  return code >= 48 && code <= 57;
};
const forbiddenNumericSeparatorSiblings = {
  decBinOct: new Set([46, 66, 69, 79, 95, 98, 101, 111]),
  hex: new Set([46, 88, 95, 120]),
};
const isAllowedNumericSeparatorSibling = {
  bin: (ch) => ch === 48 || ch === 49,
  oct: (ch) => ch >= 48 && ch <= 55,
  dec: (ch) => ch >= 48 && ch <= 57,
  hex: (ch) =>
    (ch >= 48 && ch <= 57) || (ch >= 65 && ch <= 70) || (ch >= 97 && ch <= 102),
};
function readStringContents(type, input, pos, lineStart, curLine, errors) {
  const initialPos = pos;
  const initialLineStart = lineStart;
  const initialCurLine = curLine;
  let out = '';
  let firstInvalidLoc = null;
  let chunkStart = pos;
  const { length } = input;
  for (;;) {
    if (pos >= length) {
      errors.unterminated(initialPos, initialLineStart, initialCurLine);
      out += input.slice(chunkStart, pos);
      break;
    }
    const ch = input.charCodeAt(pos);
    if (isStringEnd(type, ch, input, pos)) {
      out += input.slice(chunkStart, pos);
      break;
    }
    if (ch === 92) {
      out += input.slice(chunkStart, pos);
      const res = readEscapedChar(
        input,
        pos,
        lineStart,
        curLine,
        type === 'template',
        errors
      );
      if (res.ch === null && !firstInvalidLoc) {
        firstInvalidLoc = {
          pos,
          lineStart,
          curLine,
        };
      } else {
        out += res.ch;
      }
      ({ pos, lineStart, curLine } = res);
      chunkStart = pos;
    } else if (ch === 8232 || ch === 8233) {
      ++pos;
      ++curLine;
      lineStart = pos;
    } else if (ch === 10 || ch === 13) {
      if (type === 'template') {
        out += input.slice(chunkStart, pos) + '\n';
        ++pos;
        if (ch === 13 && input.charCodeAt(pos) === 10) {
          ++pos;
        }
        ++curLine;
        chunkStart = lineStart = pos;
      } else {
        errors.unterminated(initialPos, initialLineStart, initialCurLine);
      }
    } else {
      ++pos;
    }
  }
  return {
    pos,
    str: out,
    firstInvalidLoc,
    lineStart,
    curLine,
    containsInvalid: !!firstInvalidLoc,
  };
}
function isStringEnd(type, ch, input, pos) {
  if (type === 'template') {
    return ch === 96 || (ch === 36 && input.charCodeAt(pos + 1) === 123);
  }
  return ch === (type === 'double' ? 34 : 39);
}
function readEscapedChar(input, pos, lineStart, curLine, inTemplate, errors) {
  const throwOnInvalid = !inTemplate;
  pos++;
  const res = (ch) => ({
    pos,
    ch,
    lineStart,
    curLine,
  });
  const ch = input.charCodeAt(pos++);
  switch (ch) {
    case 110:
      return res('\n');
    case 114:
      return res('\r');
    case 120: {
      let code;
      ({ code, pos } = readHexChar(
        input,
        pos,
        lineStart,
        curLine,
        2,
        false,
        throwOnInvalid,
        errors
      ));
      return res(code === null ? null : String.fromCharCode(code));
    }
    case 117: {
      let code;
      ({ code, pos } = readCodePoint(
        input,
        pos,
        lineStart,
        curLine,
        throwOnInvalid,
        errors
      ));
      return res(code === null ? null : String.fromCodePoint(code));
    }
    case 116:
      return res('\t');
    case 98:
      return res('\b');
    case 118:
      return res('\u000b');
    case 102:
      return res('\f');
    case 13:
      if (input.charCodeAt(pos) === 10) {
        ++pos;
      }
    case 10:
      lineStart = pos;
      ++curLine;
    case 8232:
    case 8233:
      return res('');
    case 56:
    case 57:
      if (inTemplate) {
        return res(null);
      } else {
        errors.strictNumericEscape(pos - 1, lineStart, curLine);
      }
    default:
      if (ch >= 48 && ch <= 55) {
        const startPos = pos - 1;
        const match = /^[0-7]+/.exec(input.slice(startPos, pos + 2));
        let octalStr = match[0];
        let octal = parseInt(octalStr, 8);
        if (octal > 255) {
          octalStr = octalStr.slice(0, -1);
          octal = parseInt(octalStr, 8);
        }
        pos += octalStr.length - 1;
        const next = input.charCodeAt(pos);
        if (octalStr !== '0' || next === 56 || next === 57) {
          if (inTemplate) {
            return res(null);
          } else {
            errors.strictNumericEscape(startPos, lineStart, curLine);
          }
        }
        return res(String.fromCharCode(octal));
      }
      return res(String.fromCharCode(ch));
  }
}
function readHexChar(
  input,
  pos,
  lineStart,
  curLine,
  len,
  forceLen,
  throwOnInvalid,
  errors
) {
  const initialPos = pos;
  let n;
  ({ n, pos } = readInt(
    input,
    pos,
    lineStart,
    curLine,
    16,
    len,
    forceLen,
    false,
    errors,
    !throwOnInvalid
  ));
  if (n === null) {
    if (throwOnInvalid) {
      errors.invalidEscapeSequence(initialPos, lineStart, curLine);
    } else {
      pos = initialPos - 1;
    }
  }
  return {
    code: n,
    pos,
  };
}
function readInt(
  input,
  pos,
  lineStart,
  curLine,
  radix,
  len,
  forceLen,
  allowNumSeparator,
  errors,
  bailOnError
) {
  const start = pos;
  const forbiddenSiblings =
    radix === 16 ?
      forbiddenNumericSeparatorSiblings.hex
    : forbiddenNumericSeparatorSiblings.decBinOct;
  const isAllowedSibling =
    radix === 16 ? isAllowedNumericSeparatorSibling.hex
    : radix === 10 ? isAllowedNumericSeparatorSibling.dec
    : radix === 8 ? isAllowedNumericSeparatorSibling.oct
    : isAllowedNumericSeparatorSibling.bin;
  let invalid = false;
  let total = 0;
  for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) {
    const code = input.charCodeAt(pos);
    let val;
    if (code === 95 && allowNumSeparator !== 'bail') {
      const prev = input.charCodeAt(pos - 1);
      const next = input.charCodeAt(pos + 1);
      if (!allowNumSeparator) {
        if (bailOnError)
          return {
            n: null,
            pos,
          };
        errors.numericSeparatorInEscapeSequence(pos, lineStart, curLine);
      } else if (
        Number.isNaN(next) ||
        !isAllowedSibling(next) ||
        forbiddenSiblings.has(prev) ||
        forbiddenSiblings.has(next)
      ) {
        if (bailOnError)
          return {
            n: null,
            pos,
          };
        errors.unexpectedNumericSeparator(pos, lineStart, curLine);
      }
      ++pos;
      continue;
    }
    if (code >= 97) {
      val = code - 97 + 10;
    } else if (code >= 65) {
      val = code - 65 + 10;
    } else if (_isDigit(code)) {
      val = code - 48;
    } else {
      val = Infinity;
    }
    if (val >= radix) {
      if (val <= 9 && bailOnError) {
        return {
          n: null,
          pos,
        };
      } else if (
        val <= 9 &&
        errors.invalidDigit(pos, lineStart, curLine, radix)
      ) {
        val = 0;
      } else if (forceLen) {
        val = 0;
        invalid = true;
      } else {
        break;
      }
    }
    ++pos;
    total = total * radix + val;
  }
  if (pos === start || (len != null && pos - start !== len) || invalid) {
    return {
      n: null,
      pos,
    };
  }
  return {
    n: total,
    pos,
  };
}
function readCodePoint(input, pos, lineStart, curLine, throwOnInvalid, errors) {
  const ch = input.charCodeAt(pos);
  let code;
  if (ch === 123) {
    ++pos;
    ({ code, pos } = readHexChar(
      input,
      pos,
      lineStart,
      curLine,
      input.indexOf('}', pos) - pos,
      true,
      throwOnInvalid,
      errors
    ));
    ++pos;
    if (code !== null && code > 0x10ffff) {
      if (throwOnInvalid) {
        errors.invalidCodePoint(pos, lineStart, curLine);
      } else {
        return {
          code: null,
          pos,
        };
      }
    }
  } else {
    ({ code, pos } = readHexChar(
      input,
      pos,
      lineStart,
      curLine,
      4,
      false,
      throwOnInvalid,
      errors
    ));
  }
  return {
    code,
    pos,
  };
}

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