64 lines
2.2 KiB
JavaScript
64 lines
2.2 KiB
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
Object.defineProperty(exports, '__esModule', { value: true });
|
||
|
|
|
||
|
|
var token = require('./token.js');
|
||
|
|
var _0uint = require('./0uint.js');
|
||
|
|
var common = require('./common.js');
|
||
|
|
|
||
|
|
function decodeNegint8(data, pos, _minor, options) {
|
||
|
|
return new token.Token(token.Type.negint, -1 - _0uint.readUint8(data, pos + 1, options), 2);
|
||
|
|
}
|
||
|
|
function decodeNegint16(data, pos, _minor, options) {
|
||
|
|
return new token.Token(token.Type.negint, -1 - _0uint.readUint16(data, pos + 1, options), 3);
|
||
|
|
}
|
||
|
|
function decodeNegint32(data, pos, _minor, options) {
|
||
|
|
return new token.Token(token.Type.negint, -1 - _0uint.readUint32(data, pos + 1, options), 5);
|
||
|
|
}
|
||
|
|
const neg1b = BigInt(-1);
|
||
|
|
const pos1b = BigInt(1);
|
||
|
|
function decodeNegint64(data, pos, _minor, options) {
|
||
|
|
const int = _0uint.readUint64(data, pos + 1, options);
|
||
|
|
if (typeof int !== 'bigint') {
|
||
|
|
const value = -1 - int;
|
||
|
|
if (value >= Number.MIN_SAFE_INTEGER) {
|
||
|
|
return new token.Token(token.Type.negint, value, 9);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (options.allowBigInt !== true) {
|
||
|
|
throw new Error(`${ common.decodeErrPrefix } integers outside of the safe integer range are not supported`);
|
||
|
|
}
|
||
|
|
return new token.Token(token.Type.negint, neg1b - BigInt(int), 9);
|
||
|
|
}
|
||
|
|
function encodeNegint(buf, token) {
|
||
|
|
const negint = token.value;
|
||
|
|
const unsigned = typeof negint === 'bigint' ? negint * neg1b - pos1b : negint * -1 - 1;
|
||
|
|
_0uint.encodeUintValue(buf, token.type.majorEncoded, unsigned);
|
||
|
|
}
|
||
|
|
encodeNegint.encodedSize = function encodedSize(token) {
|
||
|
|
const negint = token.value;
|
||
|
|
const unsigned = typeof negint === 'bigint' ? negint * neg1b - pos1b : negint * -1 - 1;
|
||
|
|
if (unsigned < _0uint.uintBoundaries[0]) {
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
if (unsigned < _0uint.uintBoundaries[1]) {
|
||
|
|
return 2;
|
||
|
|
}
|
||
|
|
if (unsigned < _0uint.uintBoundaries[2]) {
|
||
|
|
return 3;
|
||
|
|
}
|
||
|
|
if (unsigned < _0uint.uintBoundaries[3]) {
|
||
|
|
return 5;
|
||
|
|
}
|
||
|
|
return 9;
|
||
|
|
};
|
||
|
|
encodeNegint.compareTokens = function compareTokens(tok1, tok2) {
|
||
|
|
return tok1.value < tok2.value ? 1 : tok1.value > tok2.value ? -1 : 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.decodeNegint16 = decodeNegint16;
|
||
|
|
exports.decodeNegint32 = decodeNegint32;
|
||
|
|
exports.decodeNegint64 = decodeNegint64;
|
||
|
|
exports.decodeNegint8 = decodeNegint8;
|
||
|
|
exports.encodeNegint = encodeNegint;
|