From e99f950f5018cfe737c0d1150e50d97c6e6a4823 Mon Sep 17 00:00:00 2001
From: littleblack111 <littleblack11111@gmail.com>
Date: Wed, 1 Nov 2023 20:49:36 +0800
Subject: update

---
 node_modules/source-map/lib/base64-vlq.js | 51 ++++++++++++++++++++++++-------
 1 file changed, 40 insertions(+), 11 deletions(-)

(limited to 'node_modules/source-map/lib/base64-vlq.js')

diff --git a/node_modules/source-map/lib/base64-vlq.js b/node_modules/source-map/lib/base64-vlq.js
index fc1049c8..612b4040 100644
--- a/node_modules/source-map/lib/base64-vlq.js
+++ b/node_modules/source-map/lib/base64-vlq.js
@@ -35,7 +35,7 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-const base64 = require("./base64");
+var base64 = require('./base64');
 
 // A single base 64 digit can contain 6 bits of data. For the base 64 variable
 // length quantities we use in the source map spec, the first bit is the sign,
@@ -49,16 +49,16 @@ const base64 = require("./base64");
 //   V    V
 //   101011
 
-const VLQ_BASE_SHIFT = 5;
+var VLQ_BASE_SHIFT = 5;
 
 // binary: 100000
-const VLQ_BASE = 1 << VLQ_BASE_SHIFT;
+var VLQ_BASE = 1 << VLQ_BASE_SHIFT;
 
 // binary: 011111
-const VLQ_BASE_MASK = VLQ_BASE - 1;
+var VLQ_BASE_MASK = VLQ_BASE - 1;
 
 // binary: 100000
-const VLQ_CONTINUATION_BIT = VLQ_BASE;
+var VLQ_CONTINUATION_BIT = VLQ_BASE;
 
 /**
  * Converts from a two-complement value to a value where the sign bit is
@@ -78,10 +78,9 @@ function toVLQSigned(aValue) {
  *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1
  *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2
  */
-// eslint-disable-next-line no-unused-vars
 function fromVLQSigned(aValue) {
-  const isNegative = (aValue & 1) === 1;
-  const shifted = aValue >> 1;
+  var isNegative = (aValue & 1) === 1;
+  var shifted = aValue >> 1;
   return isNegative
     ? -shifted
     : shifted;
@@ -91,10 +90,10 @@ function fromVLQSigned(aValue) {
  * Returns the base 64 VLQ encoded value.
  */
 exports.encode = function base64VLQ_encode(aValue) {
-  let encoded = "";
-  let digit;
+  var encoded = "";
+  var digit;
 
-  let vlq = toVLQSigned(aValue);
+  var vlq = toVLQSigned(aValue);
 
   do {
     digit = vlq & VLQ_BASE_MASK;
@@ -109,3 +108,33 @@ exports.encode = function base64VLQ_encode(aValue) {
 
   return encoded;
 };
+
+/**
+ * Decodes the next base 64 VLQ value from the given string and returns the
+ * value and the rest of the string via the out parameter.
+ */
+exports.decode = function base64VLQ_decode(aStr, aIndex, aOutParam) {
+  var strLen = aStr.length;
+  var result = 0;
+  var shift = 0;
+  var continuation, digit;
+
+  do {
+    if (aIndex >= strLen) {
+      throw new Error("Expected more digits in base 64 VLQ value.");
+    }
+
+    digit = base64.decode(aStr.charCodeAt(aIndex++));
+    if (digit === -1) {
+      throw new Error("Invalid base64 digit: " + aStr.charAt(aIndex - 1));
+    }
+
+    continuation = !!(digit & VLQ_CONTINUATION_BIT);
+    digit &= VLQ_BASE_MASK;
+    result = result + (digit << shift);
+    shift += VLQ_BASE_SHIFT;
+  } while (continuation);
+
+  aOutParam.value = fromVLQSigned(result);
+  aOutParam.rest = aIndex;
+};
-- 
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