IOS-2794 Optimized componentsSeparatedByCString

PantomimeFramework/PantomimeFramework/NSData+Extensions.h

@@ -260,6 +260,10 @@
 */
 - (NSArray *) componentsSeparatedByCString: (const char *) theCString;
 
+/// Like `componentsSeparatedByCString`, but calls the given block with each result and the current count.
+- (void)componentsSeparatedByCString:(const char *)theCString
+                               block:(void (^)(NSData *, NSUInteger))block;
+
 /*!
   @method asciiString
   @discussion This method turns the receiver into a NSString object.

pantomime-lib/Framework/Pantomime/NSData+Extensions.m

@@ -776,6 +776,29 @@ static const char *hexDigit = "0123456789ABCDEF";
   return AUTORELEASE(aMutableArray);
 }
 
+- (void)componentsSeparatedByCString:(const char *)theCString
+                               block:(void (^)(NSData *, NSUInteger))block
+{
+    NSUInteger len = [self length];
+    NSRange r1 = NSMakeRange(0,len);
+
+    NSRange r2 = [self rangeOfCString: theCString
+                              options: 0
+                                range: r1];
+
+
+    NSUInteger count = 0;
+    while (r2.length) {
+        block([self subdataWithRange: NSMakeRange(r1.location, r2.location - r1.location)], count);
+        count++;
+        r1.location = r2.location + r2.length;
+        r1.length = len - r1.location;
+
+        r2 = [self rangeOfCString: theCString  options: 0  range: r1];
+    }
+
+    block([self subdataWithRange: NSMakeRange(r1.location, len - r1.location)], count);
+}
 
 //
 //