91 lines
2.6 KiB
JavaScript
91 lines
2.6 KiB
JavaScript
|
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) {
|
||
|
|
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";
|
||
|
|
}
|