Simplify code

Author: blakeembrey

index.js

@@ -114,18 +114,19 @@ function parse(str, options) {
     if (endIdx === -1) {
       endIdx = str.length;
     } else if (eqIdx > endIdx) {
+      // backtrack on prior semicolon
       index = str.lastIndexOf(';', eqIdx - 1) + 1;
       continue;
     }
 
-    var keyStartIdx = startIndex(str, index, eqIdx);
-    var keyEndIdx = endIndex(str, eqIdx, keyStartIdx);
+    var keyStartIdx = startIndex(str, index);
+    var keyEndIdx = endIndex(str, eqIdx);
     var key = str.slice(keyStartIdx, keyEndIdx);
 
     // only assign once
     if (undefined === obj[key]) {
-      var valStartIdx = startIndex(str, eqIdx + 1, endIdx);
-      var valEndIdx = endIndex(str, endIdx, valStartIdx);
+      var valStartIdx = startIndex(str, eqIdx + 1);
+      var valEndIdx = endIndex(str, endIdx);
 
       if (str.charCodeAt(valStartIdx) === 0x22 /* " */ && str.charCodeAt(valEndIdx - 1) === 0x22 /* " */) {
         valStartIdx++;
@@ -142,17 +143,17 @@ function parse(str, options) {
   return obj;
 }
 
-function startIndex(str, index, max) {
+function startIndex(str, index) {
   do {
     if (str.charCodeAt(index) !== 0x20 /*   */) break;
-  } while (++index < max);
+  } while (++index);
   return index;
 }
 
-function endIndex(str, index, min) {
+function endIndex(str, index) {
   do {
     if (str.charCodeAt(index - 1) !== 0x20 /*   */) break;
-  } while (--index >= min);
+  } while (--index);
   return index;
 }