From ffaa44ceb4be73d36b86da9760935ebadfe850dc Mon Sep 17 00:00:00 2001
From: Jaro <jaro@ttx.sk>
Date: Sat, 11 Sep 2021 22:49:23 +0200
Subject: [PATCH] Fix read final unsigned to signed retyped

---
 Ymodem.h              | 4 ++--
 YmodemFileReceive.cpp | 5 +++--
 YmodemFileReceive.h   | 4 ++--
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/Ymodem.h b/Ymodem.h
index 8939537..f40a69a 100644
--- a/Ymodem.h
+++ b/Ymodem.h
@@ -115,8 +115,8 @@ private:
 
   virtual Code callback(Status status, uint8_t *buff, uint32_t *len) = 0;
 
-  virtual uint32_t read(uint8_t *buff, uint32_t len)  = 0;
-  virtual uint32_t write(uint8_t *buff, uint32_t len) = 0;
+  virtual int32_t read(uint8_t *buff, uint32_t len)  = 0;
+  virtual int32_t write(uint8_t *buff, uint32_t len) = 0;
 
   uint32_t timeDivide;
   uint32_t timeMax;
diff --git a/YmodemFileReceive.cpp b/YmodemFileReceive.cpp
index 855a037..607dd46 100644
--- a/YmodemFileReceive.cpp
+++ b/YmodemFileReceive.cpp
@@ -253,12 +253,13 @@ Ymodem::Code YmodemFileReceive::callback(Status status, uint8_t *buff, uint32_t
     }
 }
 
-uint32_t YmodemFileReceive::read(uint8_t *buff, uint32_t len)
+int32_t YmodemFileReceive::read(uint8_t *buff, uint32_t len)
 {
+    
     return serialPort->read((char *)buff, len);
 }
 
-uint32_t YmodemFileReceive::write(uint8_t *buff, uint32_t len)
+int32_t YmodemFileReceive::write(uint8_t *buff, uint32_t len)
 {
     return serialPort->write((char *)buff, len);
 }
diff --git a/YmodemFileReceive.h b/YmodemFileReceive.h
index 136f885..eefd88b 100644
--- a/YmodemFileReceive.h
+++ b/YmodemFileReceive.h
@@ -40,8 +40,8 @@ public:
 private:
     Code callback(Status status, uint8_t *buff, uint32_t *len);
 
-    uint32_t read(uint8_t *buff, uint32_t len);
-    uint32_t write(uint8_t *buff, uint32_t len);
+    int32_t read(uint8_t *buff, uint32_t len);
+    int32_t write(uint8_t *buff, uint32_t len);
 
     ofstream       file;
     boost::asio::io_service io; ///< Io service object