xref: /third_party/node/test/fixtures/wpt/encoding/legacy-mb-japanese/euc-jp/eucjp-encoder.js

var jis0208CPs = []; // index is unicode cp, value is pointer
for (var p = 0; p < jis0208.length; p++) {
    if (jis0208[p] != null && jis0208CPs[jis0208[p]] == null) {
        jis0208CPs[jis0208[p]] = p;
    }
}

function chars2cps(chars) {
    // this is needed because of javascript's handling of supplementary characters
    // char: a string of unicode characters
    // returns an array of decimal code point values
    var haut = 0;
    var out = [];
    for (var i = 0; i < chars.length; i++) {
        var b = chars.charCodeAt(i);
        if (b < 0 || b > 0xffff) {
            alert(
                "Error in chars2cps: byte out of range " + b.toString(16) + "!"
            );
        }
        if (haut != 0) {
            if (0xdc00 <= b && b <= 0xdfff) {
                out.push(0x10000 + ((haut - 0xd800) << 10) + (b - 0xdc00));
                haut = 0;
                continue;
            } else {
                alert(
                    "Error in chars2cps: surrogate out of range " +
                        haut.toString(16) +
                        "!"
                );
                haut = 0;
            }
        }
        if (0xd800 <= b && b <= 0xdbff) {
            haut = b;
        } else {
            out.push(b);
        }
    }
    return out;
}

function eucjpEncoder(stream) {
    var cps = chars2cps(stream);
    var out = "";
    var cp;
    var finished = false;

    while (!finished) {
        if (cps.length == 0) {
            finished = true;
            continue;
        } else cp = cps.shift();
        if (cp >= 0x00 && cp <= 0x7f) {
            // ASCII
            out += " " + cp.toString(16).toUpperCase();
            continue;
        }
        if (cp == 0xa5) {
            out += " 5C";
            continue;
        }
        if (cp == 0x203e) {
            out += " 7E";
            continue;
        }
        if (cp >= 0xff61 && cp <= 0xff9f) {
            var temp = cp - 0xff61 + 0xa1;
            out += " 8E " + temp.toString(16).toUpperCase();
            continue;
        }
        if (cp == 0x2212) {
            cp = 0xff0d;
        }
        var ptr = jis0208CPs[cp];
        if (ptr == null) {
            return null;
            //          out += ' &#'+cp+';'
            //          continue
        }
        var lead = Math.floor(ptr / 94) + 0xa1;
        var trail = ptr % 94 + 0xa1;
        out +=
            " " +
            lead.toString(16).toUpperCase() +
            " " +
            trail.toString(16).toUpperCase();
    }
    return out.trim();
}

function convertToHex(str) {
    // converts a string of ASCII characters to hex byte codes
    var out = "";
    var result;
    for (var c = 0; c < str.length; c++) {
        result =
            str
                .charCodeAt(c)
                .toString(16)
                .toUpperCase() + " ";
        out += result;
    }
    return out;
}

function normalizeStr(str) {
    var out = "";
    for (var c = 0; c < str.length; c++) {
        if (str.charAt(c) == "%") {
            out += String.fromCodePoint(
                parseInt(str.charAt(c + 1) + str.charAt(c + 2), 16)
            );
            c += 2;
        } else out += str.charAt(c);
    }
    var result = "";
    for (var o = 0; o < out.length; o++) {
        result +=
            "%" +
            out
                .charCodeAt(o)
                .toString(16)
                .toUpperCase();
    }
    return result.replace(/%1B%28%42$/, "");
}