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authorGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
committerGravatar Piotr Russ <mail@pruss.it> 2020-11-16 00:10:28 +0100
commite06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch)
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Diffstat (limited to 'node_modules/@webassemblyjs/wast-parser/esm/number-literals.js')
-rw-r--r--node_modules/@webassemblyjs/wast-parser/esm/number-literals.js91
1 files changed, 91 insertions, 0 deletions
diff --git a/node_modules/@webassemblyjs/wast-parser/esm/number-literals.js b/node_modules/@webassemblyjs/wast-parser/esm/number-literals.js
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+++ b/node_modules/@webassemblyjs/wast-parser/esm/number-literals.js
@@ -0,0 +1,91 @@
+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";
+} \ No newline at end of file