From fbbe77f5f2c704591a39cc732baf2b1cde5bc134 Mon Sep 17 00:00:00 2001
From: Matt Nadareski <mnadareski@outlook.com>
Date: Thu, 25 Apr 2024 14:30:28 -0400
Subject: [PATCH] Sanity checks before writing

---
 SabreTools.IO/Extensions/BinaryWriterExtensions.cs | 4 ++++
 SabreTools.IO/Extensions/StreamWriterExtensions.cs | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/SabreTools.IO/Extensions/BinaryWriterExtensions.cs b/SabreTools.IO/Extensions/BinaryWriterExtensions.cs
index 700f86f..77fa44a 100644
--- a/SabreTools.IO/Extensions/BinaryWriterExtensions.cs
+++ b/SabreTools.IO/Extensions/BinaryWriterExtensions.cs
@@ -410,6 +410,10 @@ namespace SabreTools.IO.Extensions
         /// </summary>
         private static bool WriteFromBuffer(BinaryWriter writer, byte[] value)
         {
+            // If the stream is not writable
+            if (!writer.BaseStream.CanWrite)
+                return false;
+
             // Handle the 0-byte case
             if (value.Length == 0)
                 return true;
diff --git a/SabreTools.IO/Extensions/StreamWriterExtensions.cs b/SabreTools.IO/Extensions/StreamWriterExtensions.cs
index 67b4a7a..512602b 100644
--- a/SabreTools.IO/Extensions/StreamWriterExtensions.cs
+++ b/SabreTools.IO/Extensions/StreamWriterExtensions.cs
@@ -408,6 +408,10 @@ namespace SabreTools.IO.Extensions
         /// </summary>
         private static bool WriteFromBuffer(Stream stream, byte[] value)
         {
+            // If the stream is not writable
+            if (!stream.CanWrite)
+                return false;
+
             // Handle the 0-byte case
             if (value.Length == 0)
                 return true;