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1"use strict";2Object.defineProperty(exports, "__esModule", { value: true });3const buffer_1 = require("buffer");4/**5 * Error strings6 */7const ERRORS = {8    INVALID_ENCODING: 'Invalid encoding provided. Please specify a valid encoding the internal Node.js Buffer supports.',9    INVALID_SMARTBUFFER_SIZE: 'Invalid size provided. Size must be a valid integer greater than zero.',10    INVALID_SMARTBUFFER_BUFFER: 'Invalid Buffer provided in SmartBufferOptions.',11    INVALID_SMARTBUFFER_OBJECT: 'Invalid SmartBufferOptions object supplied to SmartBuffer constructor or factory methods.',12    INVALID_OFFSET: 'An invalid offset value was provided.',13    INVALID_OFFSET_NON_NUMBER: 'An invalid offset value was provided. A numeric value is required.',14    INVALID_LENGTH: 'An invalid length value was provided.',15    INVALID_LENGTH_NON_NUMBER: 'An invalid length value was provived. A numeric value is required.',16    INVALID_TARGET_OFFSET: 'Target offset is beyond the bounds of the internal SmartBuffer data.',17    INVALID_TARGET_LENGTH: 'Specified length value moves cursor beyong the bounds of the internal SmartBuffer data.',18    INVALID_READ_BEYOND_BOUNDS: 'Attempted to read beyond the bounds of the managed data.',19    INVALID_WRITE_BEYOND_BOUNDS: 'Attempted to write beyond the bounds of the managed data.'20};21exports.ERRORS = ERRORS;22/**23 * Checks if a given encoding is a valid Buffer encoding. (Throws an exception if check fails)24 *25 * @param { String } encoding The encoding string to check.26 */27function checkEncoding(encoding) {28    if (!buffer_1.Buffer.isEncoding(encoding)) {29        throw new Error(ERRORS.INVALID_ENCODING);30    }31}32exports.checkEncoding = checkEncoding;33/**34 * Checks if a given number is a finite integer. (Throws an exception if check fails)35 *36 * @param { Number } value The number value to check.37 */38function isFiniteInteger(value) {39    return typeof value === 'number' && isFinite(value) && isInteger(value);40}41exports.isFiniteInteger = isFiniteInteger;42/**43 * Checks if an offset/length value is valid. (Throws an exception if check fails)44 *45 * @param value The value to check.46 * @param offset True if checking an offset, false if checking a length.47 */48function checkOffsetOrLengthValue(value, offset) {49    if (typeof value === 'number') {50        // Check for non finite/non integers51        if (!isFiniteInteger(value) || value < 0) {52            throw new Error(offset ? ERRORS.INVALID_OFFSET : ERRORS.INVALID_LENGTH);53        }54    }55    else {56        throw new Error(offset ? ERRORS.INVALID_OFFSET_NON_NUMBER : ERRORS.INVALID_LENGTH_NON_NUMBER);57    }58}59/**60 * Checks if a length value is valid. (Throws an exception if check fails)61 *62 * @param { Number } length The value to check.63 */64function checkLengthValue(length) {65    checkOffsetOrLengthValue(length, false);66}67exports.checkLengthValue = checkLengthValue;68/**69 * Checks if a offset value is valid. (Throws an exception if check fails)70 *71 * @param { Number } offset The value to check.72 */73function checkOffsetValue(offset) {74    checkOffsetOrLengthValue(offset, true);75}76exports.checkOffsetValue = checkOffsetValue;77/**78 * Checks if a target offset value is out of bounds. (Throws an exception if check fails)79 *80 * @param { Number } offset The offset value to check.81 * @param { SmartBuffer } buff The SmartBuffer instance to check against.82 */83function checkTargetOffset(offset, buff) {84    if (offset < 0 || offset > buff.length) {85        throw new Error(ERRORS.INVALID_TARGET_OFFSET);86    }87}88exports.checkTargetOffset = checkTargetOffset;89/**90 * Determines whether a given number is a integer.91 * @param value The number to check.92 */93function isInteger(value) {94    return typeof value === 'number' && isFinite(value) && Math.floor(value) === value;95}96/**97 * Throws if Node.js version is too low to support bigint98 */99function bigIntAndBufferInt64Check(bufferMethod) {100    if (typeof BigInt === 'undefined') {101        throw new Error('Platform does not support JS BigInt type.');102    }103    if (typeof buffer_1.Buffer.prototype[bufferMethod] === 'undefined') {104        throw new Error(`Platform does not support Buffer.prototype.${bufferMethod}.`);105    }106}107exports.bigIntAndBufferInt64Check = bigIntAndBufferInt64Check;108//# sourceMappingURL=utils.js.map