diffusion/src/node_modules/data/record/recordv2-utils.js

Diffusion JavaScript client

var RECORD_DELIMITER = 0x1;
var FIELD_DELIMITER = 0x2;
var EMPTY_FIELD = 0x3;
var RECORD_MU = 0x4;
var FIELD_MU = 0x5;

module.exports.bytesToString = function(bytes, offset, length) {
    var ret = "";

    for (var i = offset; i < offset + length; ++i) {
        switch (bytes[i]) {
            case FIELD_DELIMITER :
                ret += "<FD>";
                break;
            case RECORD_DELIMITER :
                ret += "<RD>";
                break;
            case EMPTY_FIELD :
                ret += "<EF>";
                break;
            case FIELD_MU :
                ret += "<FM>";
                break;
            case RECORD_MU :
                ret += "<RM>";
                break;
            default :
                ret += String.fromCharCode(bytes[i]);
        }
    }

    return ret;
};

module.exports.recordCount = function(bytes, offset, length) {
    if (length === 0) {
        return 0;
    }

    if (bytes[0] === RECORD_MU) {
        return 1;
    }

    var count = 1;

    for (var i = offset; i < offset + length; i++) {
        if (bytes[i] === RECORD_DELIMITER) {
            count++;
        }
    }

    return count;
};

module.exports.fieldCount = function(bytes, offset, length) {
    if (length === 0) {
        return 0;
    }

    if (bytes[0] === FIELD_MU) {
        return 1;
    }

    var count = 1;

    for (var i = offset; i < offset + length; i++) {
        if (bytes[i] === FIELD_DELIMITER) {
            count++;
        }
    }

    return count;
};

module.exports.findDelimiter = function(bytes, startIndex, endIndex, delimiter) {
    var pos = startIndex;

    for (; pos < endIndex; pos++) {
        if (bytes[pos] === delimiter) {
            break;
        }
    }

    return pos;
};

module.exports.isSingleEmptyRecord = function(bytes, offset, length) {
    return length === 1 && bytes[offset] === RECORD_MU;
};

module.exports.recordIsSingleEmptyField = function(bytes, offset, length) {
    return length === 1 && (bytes[offset] === FIELD_MU || bytes[offset] === EMPTY_FIELD);
};

module.exports.RECORD_DELIMITER = RECORD_DELIMITER;
module.exports.RECORD_DELIMITER_STRING = String.fromCharCode(RECORD_DELIMITER);

module.exports.FIELD_DELIMITER = FIELD_DELIMITER;
module.exports.FIELD_DELIMITER_STRING = String.fromCharCode(FIELD_DELIMITER);

module.exports.EMPTY_FIELD = EMPTY_FIELD;
module.exports.EMPTY_FIELD_STRING = String.fromCharCode(EMPTY_FIELD);

module.exports.RECORD_MU = RECORD_MU;
module.exports.RECORD_MU_STRING = String.fromCharCode(RECORD_MU);

module.exports.FIELD_MU = FIELD_MU;
module.exports.FIELD_MU_STRING = String.fromCharCode(FIELD_MU);