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"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); const buffer_1 = require("buffer"); /** * Error strings */ const ERRORS = { INVALID_ENCODING: 'Invalid encoding provided. Please specify a valid encoding the internal Node.js Buffer supports.', INVALID_SMARTBUFFER_SIZE: 'Invalid size provided. Size must be a valid integer greater than zero.', INVALID_SMARTBUFFER_BUFFER: 'Invalid Buffer provided in SmartBufferOptions.', INVALID_SMARTBUFFER_OBJECT: 'Invalid SmartBufferOptions object supplied to SmartBuffer constructor or factory methods.', INVALID_OFFSET: 'An invalid offset value was provided.', INVALID_OFFSET_NON_NUMBER: 'An invalid offset value was provided. A numeric value is required.', INVALID_LENGTH: 'An invalid length value was provided.', INVALID_LENGTH_NON_NUMBER: 'An invalid length value was provived. A numeric value is required.', INVALID_TARGET_OFFSET: 'Target offset is beyond the bounds of the internal SmartBuffer data.', INVALID_TARGET_LENGTH: 'Specified length value moves cursor beyong the bounds of the internal SmartBuffer data.', INVALID_READ_BEYOND_BOUNDS: 'Attempted to read beyond the bounds of the managed data.', INVALID_WRITE_BEYOND_BOUNDS: 'Attempted to write beyond the bounds of the managed data.' }; exports.ERRORS = ERRORS; /** * Checks if a given encoding is a valid Buffer encoding. (Throws an exception if check fails) * * @param { String } encoding The encoding string to check. */ function checkEncoding(encoding) { if (!buffer_1.Buffer.isEncoding(encoding)) { throw new Error(ERRORS.INVALID_ENCODING); } } exports.checkEncoding = checkEncoding; /** * Checks if a given number is a finite integer. (Throws an exception if check fails) * * @param { Number } value The number value to check. */ function isFiniteInteger(value) { return typeof value === 'number' && isFinite(value) && isInteger(value); } exports.isFiniteInteger = isFiniteInteger; /** * Checks if an offset/length value is valid. (Throws an exception if check fails) * * @param value The value to check. * @param offset True if checking an offset, false if checking a length. */ function checkOffsetOrLengthValue(value, offset) { if (typeof value === 'number') { // Check for non finite/non integers if (!isFiniteInteger(value) || value < 0) { throw new Error(offset ? ERRORS.INVALID_OFFSET : ERRORS.INVALID_LENGTH); } } else { throw new Error(offset ? ERRORS.INVALID_OFFSET_NON_NUMBER : ERRORS.INVALID_LENGTH_NON_NUMBER); } } /** * Checks if a length value is valid. (Throws an exception if check fails) * * @param { Number } length The value to check. */ function checkLengthValue(length) { checkOffsetOrLengthValue(length, false); } exports.checkLengthValue = checkLengthValue; /** * Checks if a offset value is valid. (Throws an exception if check fails) * * @param { Number } offset The value to check. */ function checkOffsetValue(offset) { checkOffsetOrLengthValue(offset, true); } exports.checkOffsetValue = checkOffsetValue; /** * Checks if a target offset value is out of bounds. (Throws an exception if check fails) * * @param { Number } offset The offset value to check. * @param { SmartBuffer } buff The SmartBuffer instance to check against. */ function checkTargetOffset(offset, buff) { if (offset < 0 || offset > buff.length) { throw new Error(ERRORS.INVALID_TARGET_OFFSET); } } exports.checkTargetOffset = checkTargetOffset; /** * Determines whether a given number is a integer. * @param value The number to check. */ function isInteger(value) { return typeof value === 'number' && isFinite(value) && Math.floor(value) === value; } /** * Throws if Node.js version is too low to support bigint */ function bigIntAndBufferInt64Check(bufferMethod) { if (typeof BigInt === 'undefined') { throw new Error('Platform does not support JS BigInt type.'); } if (typeof buffer_1.Buffer.prototype[bufferMethod] === 'undefined') { throw new Error(`Platform does not support Buffer.prototype.${bufferMethod}.`); } } exports.bigIntAndBufferInt64Check = bigIntAndBufferInt64Check; //# sourceMappingURL=utils.js.map
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