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Diffstat (limited to 'node_modules/smart-buffer/build/utils.js')
| -rw-r--r-- | node_modules/smart-buffer/build/utils.js | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/node_modules/smart-buffer/build/utils.js b/node_modules/smart-buffer/build/utils.js new file mode 100644 index 0000000..6d55981 --- /dev/null +++ b/node_modules/smart-buffer/build/utils.js @@ -0,0 +1,108 @@ +"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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