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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"; | |
} |