Function toBase64String

packages/compiler/src/output/source_map.ts:152–166

(value: string)

}

export function toBase64String(value: string): string {
  let b64 = '';
  const encoded = utf8Encode(value);
  for (let i = 0; i < encoded.length; ) {
    const i1 = encoded[i++];
    const i2 = i < encoded.length ? encoded[i++] : null;
    const i3 = i < encoded.length ? encoded[i++] : null;
    b64 += toBase64Digit(i1 >> 2);
    b64 += toBase64Digit(((i1 & 3) << 4) | (i2 === null ? 0 : i2 >> 4));
    b64 += i2 === null ? '=' : toBase64Digit(((i2 & 15) << 2) | (i3 === null ? 0 : i3 >> 6));
    b64 += i2 === null || i3 === null ? '=' : toBase64Digit(i3 & 63);
  }

  return b64;
}

function toBase64VLQ(value: number): string {
  value = value < 0 ? (-value << 1) + 1 : value << 1;