From 9c5107ed90643fb445bd6bbdb79750233b4b8e61 Mon Sep 17 00:00:00 2001
From: Gregory John Casamento <greg.casamento@gmail.com>
Date: Sat, 7 Sep 2024 17:49:04 -0400
Subject: [PATCH] Add getOffset:error: implementation to base

---
 Headers/Foundation/NSFileHandle.h |  3 +++
 Source/GSFileHandle.m             |  1 -
 Source/NSFileHandle.m             | 19 +++++++++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/Headers/Foundation/NSFileHandle.h b/Headers/Foundation/NSFileHandle.h
index b09cfef2f8..683409769c 100644
--- a/Headers/Foundation/NSFileHandle.h
+++ b/Headers/Foundation/NSFileHandle.h
@@ -76,6 +76,9 @@ GS_EXPORT_CLASS
 - (NSData*) readDataToEndOfFile;
 - (NSData*) readDataOfLength: (unsigned int)len;
 - (void) writeData: (NSData*)item;
+#if OS_API_VERSION(MAC_OS_X_VERSION_10_15, GS_API_LATEST)
+- (BOOL) getOffset: (unsigned long long *)offsetInFile error: (NSError **)error;
+#endif
 
 // Asynchronous I/O operations
 
diff --git a/Source/GSFileHandle.m b/Source/GSFileHandle.m
index 13a9c29b75..cdd74c18bc 100644
--- a/Source/GSFileHandle.m
+++ b/Source/GSFileHandle.m
@@ -1439,7 +1439,6 @@ - (void) writeData: (NSData*)item
     }
 }
 
-
 // Asynchronous I/O operations
 
 - (void) acceptConnectionInBackgroundAndNotifyForModes: (NSArray*)modes
diff --git a/Source/NSFileHandle.m b/Source/NSFileHandle.m
index 29a7715ddf..bbeab0a3ed 100644
--- a/Source/NSFileHandle.m
+++ b/Source/NSFileHandle.m
@@ -320,6 +320,25 @@ - (void) writeData: (NSData*)item
   [self subclassResponsibility: _cmd];
 }
 
+/**
+ * Get the current position in the file.
+ */
+- (BOOL) getOffset: (unsigned long long *)offsetInFile error: (NSError **)error
+{
+  BOOL result = YES;
+
+  // We can do the concrete implementation here since the method relies on
+  // offsetInFile to get the offset.
+  *error = nil;
+  *offsetInFile = [self offsetInFile];
+  if (*offsetInFile == -1)
+    {
+      *offsetInFile = 0;
+      result = NO;
+    }
+
+  return result;
+}
 
 // Asynchronous I/O operations