_writeDecimal()

in src/internal/BinaryCommunicator.ts [331:361]

• 31 lines of code
• 7 McCabe index (conditional complexity)

    _writeDecimal(buffer, decimal) {
        let strValue = decimal.toExponential();
        let expIndex = strValue.indexOf('e');
        if (expIndex < 0) {
            expIndex = strValue.indexOf('E');
        }
        let scale = 0;
        if (expIndex >= 0) {
            scale = parseInt(strValue.substring(expIndex + 1));
            strValue = strValue.substring(0, expIndex);
        }
        const isNegative = strValue.startsWith('-');
        if (isNegative) {
            strValue = strValue.substring(1);
        }
        const dotIndex = strValue.indexOf('.');
        if (dotIndex >= 0) {
            scale -= strValue.length - dotIndex - 1;
            strValue = strValue.substring(0, dotIndex) + strValue.substring(dotIndex + 1);
        }
        scale = -scale;
        let hexValue = new Decimal(strValue).toHexadecimal().substring(2);
        hexValue = ((hexValue.length % 2 !== 0) ? '000' : '00') + hexValue;
        const valueBuffer = Buffer.from(hexValue, 'hex');
        if (isNegative) {
            valueBuffer[0] |= 0x80;
        }
        buffer.writeInteger(scale);
        buffer.writeInteger(valueBuffer.length);
        buffer.writeBuffer(valueBuffer);
    }