@abaplint/runtime/build/src/statements/set_bit.js

Transpiler - Runtime

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.setBit = setBit;
/* eslint-disable no-bitwise */
const types_1 = require("../types");
function setBit(number, hex, val) {
    if (number.get() <= 0) {
        throw new Error("BIT_OFFSET_NOT_POSITIVE");
    }
    else if (hex instanceof types_1.HexUInt8) {
        const byteIndex = Math.floor((number.get() - 1) / 8);
        const bitIndex = (number.get() - 1) % 8;
        let bits = hex.getOffsetRaw(byteIndex);
        const bitMask = 1 << (8 - bitIndex - 1);
        if (val?.get() === 0 || val?.get() === "0") {
            bits &= ~bitMask;
        }
        else {
            bits |= bitMask;
        }
        hex.setOffset(byteIndex, bits);
    }
    else {
        const hexFull = hex.get();
        const fullByteLength = Math.ceil(hexFull.length / 2);
        const byteNum = Math.ceil(number.get() / 8);
        if (byteNum > fullByteLength) {
            return;
        }
        let pre = "";
        let byte = "";
        let post = "";
        if (hexFull.length > 2) {
            if (byteNum > 1) {
                pre = hexFull.substr(0, (byteNum - 1) * 2);
            }
            byte = hexFull.substr((byteNum - 1) * 2, 2);
            if (fullByteLength > byteNum) {
                post = hexFull.substr(byteNum * 2, (fullByteLength - byteNum) * 2);
            }
        }
        else {
            byte = hexFull;
        }
        let bits = parseInt(byte, 16);
        const bitMask = 1 << 8 - (number.get() - (byteNum - 1) * 8);
        if (val?.get() === 0 || val?.get() === "0") {
            bits &= ~bitMask;
        }
        else {
            bits |= bitMask;
        }
        const reconstructed = pre + bits.toString(16).toUpperCase().padStart(2, "0") + post;
        hex.set(reconstructed);
    }
}
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