Function getUtf8CodePoints

lib.esm/utils/utf8.js:67–150

(_bytes, onError)

});
// http://stackoverflow.com/questions/13356493/decode-utf-8-with-javascript#13691499
function getUtf8CodePoints(_bytes, onError) {
    if (onError == null) {
        onError = Utf8ErrorFuncs.error;
    }
    const bytes = getBytes(_bytes, "bytes");
    const result = [];
    let i = 0;
    // Invalid bytes are ignored
    while (i < bytes.length) {
        const c = bytes[i++];
        // 0xxx xxxx
        if (c >> 7 === 0) {
            result.push(c);
            continue;
        }
        // Multibyte; how many bytes left for this character?
        let extraLength = null;
        let overlongMask = null;
        // 110x xxxx 10xx xxxx
        if ((c & 0xe0) === 0xc0) {
            extraLength = 1;
            overlongMask = 0x7f;
            // 1110 xxxx 10xx xxxx 10xx xxxx
        }
        else if ((c & 0xf0) === 0xe0) {
            extraLength = 2;
            overlongMask = 0x7ff;
            // 1111 0xxx 10xx xxxx 10xx xxxx 10xx xxxx
        }
        else if ((c & 0xf8) === 0xf0) {
            extraLength = 3;
            overlongMask = 0xffff;
        }
        else {
            if ((c & 0xc0) === 0x80) {
                i += onError("UNEXPECTED_CONTINUE", i - 1, bytes, result);
            }
            else {
                i += onError("BAD_PREFIX", i - 1, bytes, result);
            }
            continue;
        }
        // Do we have enough bytes in our data?
        if (i - 1 + extraLength >= bytes.length) {
            i += onError("OVERRUN", i - 1, bytes, result);
            continue;
        }
        // Remove the length prefix from the char
        let res = c & ((1 << (8 - extraLength - 1)) - 1);
        for (let j = 0; j < extraLength; j++) {
            let nextChar = bytes[i];
            // Invalid continuation byte
            if ((nextChar & 0xc0) != 0x80) {
                i += onError("MISSING_CONTINUE", i, bytes, result);
                res = null;
                break;
            }
            ;