From 39275525216c778f33011b6837a04d91edfa8454 Mon Sep 17 00:00:00 2001
From: Dirk Zimmermann <dz@pep.security>
Date: Wed, 28 Apr 2021 14:27:49 +0200
Subject: [PATCH] IOS-2794 Wrong approach

---
 PantomimeFramework/PantomimeFramework/NSData+Extensions.h | 3 +++
 pantomime-lib/Framework/Pantomime/NSData+Extensions.m     | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/PantomimeFramework/PantomimeFramework/NSData+Extensions.h b/PantomimeFramework/PantomimeFramework/NSData+Extensions.h
index b8db21e..853b3a9 100644
--- a/PantomimeFramework/PantomimeFramework/NSData+Extensions.h
+++ b/PantomimeFramework/PantomimeFramework/NSData+Extensions.h
@@ -158,6 +158,9 @@
 */
 - (NSData *) subdataToIndex: (NSUInteger) theIndex;
 
+/// Like `subDataWithRange`, but doesn't copy bytes, and instead points to the bytes from the original.
+- (NSData *)subdataUncopiedWithRange:(NSRange)range;
+
 /**
  @discussion Simple method to trim the leading and trailing whitespaces (characters with no visible
  representation). Cahracters currently taken into accout are:
diff --git a/pantomime-lib/Framework/Pantomime/NSData+Extensions.m b/pantomime-lib/Framework/Pantomime/NSData+Extensions.m
index b7dbba7..00faad7 100644
--- a/pantomime-lib/Framework/Pantomime/NSData+Extensions.m
+++ b/pantomime-lib/Framework/Pantomime/NSData+Extensions.m
@@ -437,6 +437,13 @@ static const char *hexDigit = "0123456789ABCDEF";
   return [self subdataWithRange: NSMakeRange(0, theIndex)];
 }
 
+- (NSData *)subdataUncopiedWithRange:(NSRange)range
+{
+    const char *theBytes = [self bytes];
+    const char *newBytes = theBytes + range.location;
+    return [NSData dataWithBytesNoCopy:(void *) newBytes length:range.length];
+}
+
 - (NSData *)dataByTrimmingWhiteSpaces
 {
     const char *bytes = [self bytes];