utf16-to-sjis/dist/index.js

Tiny UTF-16 to Shift-JIS (CP932) converter.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.convert = void 0;
const table_1 = require("./table");
function convert(data) {
    let arr;
    if (typeof data == "string") {
        let cps = [];
        for (let i = 0; i < data.length; i++) {
            cps.push(data.charCodeAt(i));
        }
        arr = cps;
    }
    else {
        arr = data;
    }
    const buf = new ArrayBuffer(arr.length * 2);
    const dv = new DataView(buf);
    let wp = 0;
    for (let i = 0; i < arr.length; i++) {
        const code = arr[i];
        if (code != null) {
            let ch;
            if (code < 0x80) {
                ch = code & 0x7f;
            }
            else if (0xff61 <= code && code <= 0xff9f) {
                ch = code - (0xfec0); // map 0xff61...0xff9f to hankaku kana 0xa1...0xdf.
            }
            else {
                ch = table_1.UTF16_TO_SJIS[code];
            }
            if (ch != null) {
                if (ch < 0x100) {
                    dv.setUint8(wp++, ch);
                }
                else if (ch < 0x10000) {
                    dv.setUint16(wp, ch);
                    wp += 2;
                }
                else {
                    dv.setUint8(wp++, 0x3f); // '?'
                }
            }
            else {
                if (code < 0x100) {
                    dv.setUint8(wp, 0x3f); // '?'
                }
                else {
                    dv.setUint16(wp, 0x8148); // '？'
                    wp += 2;
                }
            }
        }
    }
    return new Uint8Array(buf, 0, wp);
}
exports.convert = convert;
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