From 169eb7e71a9b1e1c365a8f0a4bba99a62f8e3136 Mon Sep 17 00:00:00 2001
From: Said Achmiz <said@saidachmiz.net>
Date: Mon, 13 Dec 2021 18:15:47 -0500
Subject: [PATCH] Add range-related utility properties/methods

---
 NSData+SA_NSDataExtensions.h | 11 +++++++++++
 NSData+SA_NSDataExtensions.m | 24 ++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

diff --git a/NSData+SA_NSDataExtensions.h b/NSData+SA_NSDataExtensions.h
index 3a6d898..26b5b23 100644
--- a/NSData+SA_NSDataExtensions.h
+++ b/NSData+SA_NSDataExtensions.h
@@ -42,6 +42,17 @@
  */
 @property (readonly) NSData *dataWithTerminatedCString;
 
+/*	Range manipulation.
+ */
+
+@property (readonly) NSRange startRange;
+@property (readonly) NSRange fullRange;
+@property (readonly) NSRange endRange;
+
+-(NSRange) rangeAfterRange:(NSRange)aRange;
+-(NSRange) rangeFromEndOfRange:(NSRange)aRange;
+-(NSRange) rangeToEndFrom:(NSRange)aRange;
+
 /** Returns an NSData object containing a blank C string (i.e. a byte sequence
 	of length 1, containing the null character '\0').
  */
diff --git a/NSData+SA_NSDataExtensions.m b/NSData+SA_NSDataExtensions.m
index 8cfa859..4f0a2d0 100644
--- a/NSData+SA_NSDataExtensions.m
+++ b/NSData+SA_NSDataExtensions.m
@@ -37,6 +37,30 @@
 	}
 }
 
+-(NSRange) startRange {
+	return NSMakeRange(0, 0);
+}
+
+-(NSRange) fullRange {
+	return NSMakeRange(0, self.length);
+}
+
+-(NSRange) endRange {
+	return NSMakeRange(self.length, 0);
+}
+
+-(NSRange) rangeAfterRange:(NSRange)aRange {
+	return NSMakeRange(NSMaxRange(aRange), self.length - NSMaxRange(aRange));
+}
+
+-(NSRange) rangeFromEndOfRange:(NSRange)aRange {
+	return NSMakeRange(NSMaxRange(aRange) - 1, self.length - NSMaxRange(aRange) + 1);
+}
+
+-(NSRange) rangeToEndFrom:(NSRange)aRange {
+	return NSMakeRange(aRange.location, self.length - aRange.location);
+}
+
 +(NSData *) dataWithBlankCString {
 	return [NSData dataWithBytes:"\0" 
 						  length:1];