postgrejs/esm/util/decode-binaryarray.js

Professional PostgreSQL client NodeJS

import { BufferReader } from '../protocol/buffer-reader.js';
export function decodeBinaryArray(buf, decoder, options = {}) {
    if (!buf.length)
        return null;
    const io = new BufferReader(buf);
    const ndims = io.readInt32BE();
    io.readInt32BE(); // hasNulls
    const elementOID = io.readInt32BE(); // element oid
    if (ndims === 0)
        return [];
    const dims = [];
    const readDim = (level) => {
        const elemCount = dims[level];
        const target = new Array(elemCount);
        for (let i = 0; i < elemCount; i++) {
            if (level < dims.length - 1) {
                target[i] = readDim(level + 1);
                continue;
            }
            const len = io.readInt32BE();
            if (len === -1)
                target[i] = null;
            else {
                const b = io.readBuffer(len);
                target[i] = decoder(b, { ...options, elementOID });
            }
        }
        return target;
    };
    for (let d = 0; d < ndims; d++) {
        dims[d] = io.readInt32BE();
        io.readInt32BE(); // LBound
    }
    return readDim(0);
}