From 983a3d31a25cde3961b400c3999753f1b01f6860 Mon Sep 17 00:00:00 2001
From: Kevin Partington <kevin.partington@kernelpanicstudios.com>
Date: Sat, 24 Feb 2018 23:12:12 -0600
Subject: [PATCH] fix: Refactored section split logic

Rebase of: #73
Author: @platinumazure
---
 lib/ini.js | 36 +++++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

diff --git a/lib/ini.js b/lib/ini.js
index d05682b..3fde6ff 100644
--- a/lib/ini.js
+++ b/lib/ini.js
@@ -38,7 +38,7 @@ const encode = (obj, opt) => {
   }
 
   for (const k of children) {
-    const nk = dotSplit(k).join('\\.')
+    const nk = splitSections(k, '.').join('\\.')
     const section = (opt.section ? opt.section + '.' : '') + nk
     const { whitespace } = opt
     const child = encode(obj[k], {
@@ -55,13 +55,31 @@ const encode = (obj, opt) => {
   return out
 }
 
-const dotSplit = str =>
-  str.replace(/\1/g, '\u0002LITERAL\\1LITERAL\u0002')
-    .replace(/\\\./g, '\u0001')
-    .split(/\./)
-    .map(part =>
-      part.replace(/\1/g, '\\.')
-        .replace(/\2LITERAL\\1LITERAL\2/g, '\u0001'))
+function splitSections (str, separator) {
+  var lastMatchIndex = 0
+  var lastSeparatorIndex = 0
+  var nextIndex = 0
+  var sections = []
+
+  do {
+    nextIndex = str.indexOf(separator, lastMatchIndex)
+
+    if (nextIndex !== -1) {
+      lastMatchIndex = nextIndex + separator.length
+
+      if (nextIndex > 0 && str[nextIndex - 1] === '\\') {
+        continue
+      }
+
+      sections.push(str.slice(lastSeparatorIndex, nextIndex))
+      lastSeparatorIndex = nextIndex + separator.length
+    }
+  } while (nextIndex !== -1)
+
+  sections.push(str.slice(lastSeparatorIndex))
+
+  return sections
+}
 
 const decode = str => {
   const out = Object.create(null)
@@ -132,7 +150,7 @@ const decode = str => {
 
     // see if the parent section is also an object.
     // if so, add it to that, and mark this one for deletion
-    const parts = dotSplit(k)
+    const parts = splitSections(k, '.')
     p = out
     const l = parts.pop()
     const nl = l.replace(/\\\./g, '.')