27 lines
681 B
JavaScript
27 lines
681 B
JavaScript
|
export default function stripFinalNewline(input) {
|
||
|
|
if (typeof input === 'string') {
|
||
|
|
return stripFinalNewlineString(input);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!(ArrayBuffer.isView(input) && input.BYTES_PER_ELEMENT === 1)) {
|
||
|
|
throw new Error('Input must be a string or a Uint8Array');
|
||
|
|
}
|
||
|
|
|
||
|
|
return stripFinalNewlineBinary(input);
|
||
|
|
}
|
||
|
|
|
||
|
|
const stripFinalNewlineString = input =>
|
||
|
|
input.at(-1) === LF
|
||
|
|
? input.slice(0, input.at(-2) === CR ? -2 : -1)
|
||
|
|
: input;
|
||
|
|
|
||
|
|
const stripFinalNewlineBinary = input =>
|
||
|
|
input.at(-1) === LF_BINARY
|
||
|
|
? input.subarray(0, input.at(-2) === CR_BINARY ? -2 : -1)
|
||
|
|
: input;
|
||
|
|
|
||
|
|
const LF = '\n';
|
||
|
|
const LF_BINARY = LF.codePointAt(0);
|
||
|
|
const CR = '\r';
|
||
|
|
const CR_BINARY = CR.codePointAt(0);
|