Function utf8Array

index.js:361–390

Converts a string to an array of UTF8 bytes.

(string)

/** Converts a string to an array of UTF8 bytes. */
function utf8Array(string) {
  var offset = 0,
    c1,
    c2;
  var buffer = new Array(utf8Length(string));
  for (var i = 0, k = string.length; i < k; ++i) {
    c1 = string.charCodeAt(i);
    if (c1 < 128) {
      buffer[offset++] = c1;
    } else if (c1 < 2048) {
      buffer[offset++] = (c1 >> 6) | 192;
      buffer[offset++] = (c1 & 63) | 128;
    } else if (
      (c1 & 0xfc00) === 0xd800 &&
      ((c2 = string.charCodeAt(i + 1)) & 0xfc00) === 0xdc00
    ) {
      c1 = 0x10000 + ((c1 & 0x03ff) << 10) + (c2 & 0x03ff);
      ++i;
      buffer[offset++] = (c1 >> 18) | 240;
      buffer[offset++] = ((c1 >> 12) & 63) | 128;
      buffer[offset++] = ((c1 >> 6) & 63) | 128;
      buffer[offset++] = (c1 & 63) | 128;
    } else {
      buffer[offset++] = (c1 >> 12) | 224;
      buffer[offset++] = ((c1 >> 6) & 63) | 128;
      buffer[offset++] = (c1 & 63) | 128;
    }
  }
  return buffer;
}

// A base64 implementation for the bcrypt algorithm. This is partly non-standard.