From cd040cfeb47f91b29c6d138f745b442483f4cf44 Mon Sep 17 00:00:00 2001
From: Onran <kotshel2009@gmail.com>
Date: Sun, 21 Jun 2026 21:13:30 +0900
Subject: [PATCH] fix of io_stream:available for non-buffered streams when
 "length" arg defined

---
 res/modules/io_stream.lua | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/res/modules/io_stream.lua b/res/modules/io_stream.lua
index 3dff50ce4..d2f132802 100644
--- a/res/modules/io_stream.lua
+++ b/res/modules/io_stream.lua
@@ -125,15 +125,21 @@ function io_stream:set_max_buffer_size(maxBufferSize)
 end
 
 function io_stream:available(length)
+    local available
+
     if self.mode == BUFFERED_MODE then
         self:__update_read_buffer()
 
-        if not length then
-            return #self.readBuffer
-        else
-            return #self.readBuffer >= length
-        end
-    else return self.ioLib.available(self.descriptor) end
+        available = #self.readBuffer
+    else
+        available = self.ioLib.available(self.descriptor)
+    end
+
+    if not length then
+        return available
+    else
+        return available >= length
+    end
 end
 
 function io_stream:__update_read_buffer()