node fixes, updates

1 files changed, 106 insertions, 0 deletions

diff --git a/node_modules/@webassemblyjs/helper-numbers/src/index.js b/node_modules/@webassemblyjs/helper-numbers/src/index.js
new file mode 100644
index 00000000..773402e4
--- /dev/null
+++ b/node_modules/@webassemblyjs/helper-numbers/src/index.js
@@ -0,0 +1,106 @@
+// @flow
+
+import Long from "@xtuc/long";
+import parseHexFloat from "@webassemblyjs/floating-point-hex-parser";
+import { CompileError } from "@webassemblyjs/helper-api-error";
+
+export function parse32F(sourceString: string): number {
+  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: string): number {
+  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: string): number {
+  let 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: string): number {
+  const value = parse32I(sourceString);
+  if (value < 0) {
+    throw new CompileError("Illegal value for u32: " + sourceString);
+  }
+  return value;
+}
+
+export function parse64I(sourceString: string): LongNumber {
+  // $FlowIgnore
+  let long: 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,
+  };
+}
+
+const NAN_WORD = /^\+?-?nan/;
+const INF_WORD = /^\+?-?inf/;
+
+export function isInfLiteral(sourceString: string): boolean {
+  return INF_WORD.test(sourceString.toLowerCase());
+}
+
+export function isNanLiteral(sourceString: string): boolean {
+  return NAN_WORD.test(sourceString.toLowerCase());
+}
+
+function isDecimalExponentLiteral(sourceString: string): boolean {
+  return (
+    !isHexLiteral(sourceString) && sourceString.toUpperCase().includes("E")
+  );
+}
+
+function isHexLiteral(sourceString: string): boolean {
+  return (
+    sourceString.substring(0, 2).toUpperCase() === "0X" ||
+    sourceString.substring(0, 3).toUpperCase() === "-0X"
+  );
+}