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dopeuni444
2025-07-31 12:23:33 +04:00
parent 20b46678b7
commit b5a22951ae
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MIT License
Copyright (c) 2018 Sven Sauleau <sven@sauleau.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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import Long from "@xtuc/long";
import parseHexFloat from "@webassemblyjs/floating-point-hex-parser";
import { CompileError } from "@webassemblyjs/helper-api-error";
export function parse32F(sourceString) {
if (isHexLiteral(sourceString)) {
return parseHexFloat(sourceString);
}
if (isInfLiteral(sourceString)) {
return sourceString[0] === "-" ? -1 : 1;
}
if (isNanLiteral(sourceString)) {
return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x400000);
}
return parseFloat(sourceString);
}
export function parse64F(sourceString) {
if (isHexLiteral(sourceString)) {
return parseHexFloat(sourceString);
}
if (isInfLiteral(sourceString)) {
return sourceString[0] === "-" ? -1 : 1;
}
if (isNanLiteral(sourceString)) {
return (sourceString[0] === "-" ? -1 : 1) * (sourceString.includes(":") ? parseInt(sourceString.substring(sourceString.indexOf(":") + 1), 16) : 0x8000000000000);
}
if (isHexLiteral(sourceString)) {
return parseHexFloat(sourceString);
}
return parseFloat(sourceString);
}
export function parse32I(sourceString) {
var value = 0;
if (isHexLiteral(sourceString)) {
value = ~~parseInt(sourceString, 16);
} else if (isDecimalExponentLiteral(sourceString)) {
throw new Error("This number literal format is yet to be implemented.");
} else {
value = parseInt(sourceString, 10);
}
return value;
}
export function parseU32(sourceString) {
var value = parse32I(sourceString);
if (value < 0) {
throw new CompileError("Illegal value for u32: " + sourceString);
}
return value;
}
export function parse64I(sourceString) {
// $FlowIgnore
var _long;
if (isHexLiteral(sourceString)) {
_long = Long.fromString(sourceString, false, 16);
} else if (isDecimalExponentLiteral(sourceString)) {
throw new Error("This number literal format is yet to be implemented.");
} else {
_long = Long.fromString(sourceString);
}
return {
high: _long.high,
low: _long.low
};
}
var NAN_WORD = /^\+?-?nan/;
var INF_WORD = /^\+?-?inf/;
export function isInfLiteral(sourceString) {
return INF_WORD.test(sourceString.toLowerCase());
}
export function isNanLiteral(sourceString) {
return NAN_WORD.test(sourceString.toLowerCase());
}
function isDecimalExponentLiteral(sourceString) {
return !isHexLiteral(sourceString) && sourceString.toUpperCase().includes("E");
}
function isHexLiteral(sourceString) {
return sourceString.substring(0, 2).toUpperCase() === "0X" || sourceString.substring(0, 3).toUpperCase() === "-0X";
}