lib: add validateInteger() validator

cjihrig · cjihrig · commit f8464c869833 · 2018-05-25T21:48:19.000-04:00
This allows validation of integers that are not int32 or uint32. PR-URL: #20851 Fixes: #20844 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
diff --git a/lib/internal/validators.js b/lib/internal/validators.js
@@ -48,6 +48,20 @@ function validateAndMaskMode(value, name, def) {
   throw new ERR_INVALID_ARG_VALUE(name, value, modeDesc);
 }
 
+function validateInteger(value, name) {
+  let err;
+
+  if (typeof value !== 'number')
+    err = new ERR_INVALID_ARG_TYPE(name, 'number', value);
+  else if (!Number.isSafeInteger(value))
+    err = new ERR_OUT_OF_RANGE(name, 'an integer', value);
+
+  if (err) {
+    Error.captureStackTrace(err, validateInteger);
+    throw err;
+  }
+}
+
 function validateInt32(value, name, min = -2147483648, max = 2147483647) {
   // The defaults for min and max correspond to the limits of 32-bit integers.
   if (!isInt32(value)) {
@@ -93,6 +107,7 @@ module.exports = {
   isInt32,
   isUint32,
   validateAndMaskMode,
+  validateInteger,
   validateInt32,
   validateUint32
 };
