From 660ff3f2175e77a34f272002262ee145334847b7 Mon Sep 17 00:00:00 2001
From: Derek Miller <demiller@netflix.com>
Date: Fri, 25 Oct 2019 10:42:28 -0700
Subject: [PATCH] Fix issue #15 where escaped escape chars were treated as
 escape chars

---
 CHANGELOG.md           | 6 ++++++
 index.js               | 6 +++++-
 test/options.quotes.js | 4 ++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 38b08a7..aa66287 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,12 @@ Changelog entries are classified using the following labels _(from [keep-a-chang
 
 </details>
 
+## [Unreleased]
+
+**Fixed**
+
+- Fix issue #15 where escaped escape chars were treated as escape chars
+
 ## [6.1.0] - 2019-04-22
 
 **Added**
diff --git a/index.js b/index.js
index 8e2078d..71a43dd 100644
--- a/index.js
+++ b/index.js
@@ -15,6 +15,7 @@ module.exports = (input, options = {}, fn) => {
   let string = input;
   let value, node;
   let i = -1;
+  let precedingEscapeCount = 0;
 
   state.bos = () => i === 0;
   state.eos = () => i === string.length;
@@ -46,7 +47,7 @@ module.exports = (input, options = {}, fn) => {
 
   const closeIndex = (value, startIdx) => {
     let idx = string.indexOf(value, startIdx);
-    if (idx > -1 && string[idx - 1] === '\\') {
+    if (idx > -1 && precedingEscapeCount % 2 === 1) {
       idx = closeIndex(value, idx + 1);
     }
     return idx;
@@ -59,6 +60,7 @@ module.exports = (input, options = {}, fn) => {
 
     // handle escaped characters
     if (value === '\\') {
+      precedingEscapeCount++;
       if (peek() === '\\') {
         append(value + next());
       } else {
@@ -68,6 +70,8 @@ module.exports = (input, options = {}, fn) => {
         append(next());
       }
       continue;
+    } else if (string[i - 1] !== '\\') {
+      precedingEscapeCount = 0;
     }
 
     // handle quoted strings
diff --git a/test/options.quotes.js b/test/options.quotes.js
index 50f6539..fa5c9f5 100644
--- a/test/options.quotes.js
+++ b/test/options.quotes.js
@@ -85,4 +85,8 @@ describe('options.quotes', function() {
     assert.deepEqual(split("brian's"), ["brian's"]);
     assert.deepEqual(split("a.'b.c"), ['a', "'b", 'c']);
   });
+
+  it('should ignore escaped escape chars before quote', function() {
+    assert.deepEqual(split('\\\\\\\\"hello.world\\\\\\\\"', options), ['\\\\\\\\"hello.world\\\\\\\\"']);
+  });
 });