win32-def/dist/lib/util.js

win32 definitions for node-ffi

import assert from 'node:assert';
import ffi from 'koffi';
export function decodeInt16Array(input, length = -1) {
    assert(input, 'input must be an object');
    assert(typeof input.buffer === 'object', 'input.buffer must be an object');
    assert(typeof input.byteLength === 'number', 'input.byteLength must be a number');
    assert(typeof input.byteOffset === 'number', 'input.byteOffset must be a number');
    assert(typeof input.length === 'number', 'input.length must be a number');
    // const str = Buffer.from(input.buffer).toString('ucs2')
    // return str
    const str = ffi.decode(input, 'char16_t', length);
    return str || '';
}
/**
 * Convert a Buffer to string with UCS2 encoding, and remove the last '\0'.
 */
export function ucsBufferToString(input, charNum = 0) {
    // read the last 2 bytes to check if it is '\0'
    const last = input.readUInt16LE(input.length - 2);
    if (charNum > 0) {
        const n2 = input.length / 2;
        const offset = Math.min(charNum, n2);
        const txt = input.toString('ucs2', 0, offset * 2);
        // return last === 0 && charNum >= n2 ? txt.slice(0, -1) : txt
        const ret = last === 0 ? txt.replace(/\0+$/u, '') : txt;
        return ret;
    }
    if (last === 0) { // remove the last '\0'
        return input.toString('ucs2').replace(/\0+$/u, '');
    }
    return input.toString('ucs2');
}
/**
 * Convert a string to Buffer with UCS2 encoding, and append a '\0' at the end.
 */
export function ucsBufferFrom(str) {
    assert(typeof str === 'string', 'str must be a string ');
    return Buffer.from(str + '\0', 'ucs2');
}
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