electr0lysis/codec/VintDecoder.js

Simple framework for data serialization and interchange.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const DecoderError_1 = require("../DecoderError");
class VintDecoder {
    decode(type, view, offset, context) {
        let position = offset;
        let value = 0;
        let shift = 0;
        while (true) {
            if (shift == 5 * 7) {
                throw new DecoderError_1.default();
            }
            let byte = context.decode({ name: "Uint8" }, view, position);
            position += 1;
            value |= (byte.value & 0x7f) << shift;
            shift += 7;
            if ((byte.value & 0x80) == 0x00) {
                const size = position - offset;
                return { value, size };
            }
        }
    }
}
exports.default = VintDecoder;
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