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1"use strict";
2Object.defineProperty(exports, "__esModule", { value: true });
3const buffer_1 = require("buffer");
4/**
5 * Error strings
6 */
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 integers
51        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 bigint
98 */
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