From 0a19794cec0bab9e2b94e4a2161951098790c852 Mon Sep 17 00:00:00 2001
From: harry <hrosen2016@gmail.com>
Date: Sun, 29 Jan 2023 12:32:47 -0500
Subject: [PATCH] Fixed a few warnings for -Wunused-result with fread usage.

---
 src/cart.cpp    | 12 ++++++++++--
 src/emufile.cpp |  6 +++++-
 src/file.cpp    |  5 ++++-
 src/netplay.cpp |  5 ++++-
 4 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/src/cart.cpp b/src/cart.cpp
index 26f7627c..55741b7f 100644
--- a/src/cart.cpp
+++ b/src/cart.cpp
@@ -562,10 +562,18 @@ void FCEU_LoadGameSave(CartInfo *LocalHWInfo) {
 
 		std::string soot = FCEU_MakeFName(FCEUMKF_SAV, 0, "sav");
 		sp = FCEUD_UTF8fopen(soot, "rb");
-		if (sp != NULL) {
+		if (sp != NULL)
+		{
 			for (int x = 0; x < 4; x++)
+			{
 				if (LocalHWInfo->SaveGame[x])
-					fread(LocalHWInfo->SaveGame[x], 1, LocalHWInfo->SaveGameLen[x], sp);
+				{
+					if ( fread(LocalHWInfo->SaveGame[x], 1, LocalHWInfo->SaveGameLen[x], sp) != static_cast<size_t>(LocalHWInfo->SaveGameLen[x]) )
+					{
+						FCEU_printf("Warning save game data read came up short!\n");
+					}
+				}
+			}
 		}
 	}
 }
diff --git a/src/emufile.cpp b/src/emufile.cpp
index ee4d32fb..a4edb7e8 100644
--- a/src/emufile.cpp
+++ b/src/emufile.cpp
@@ -23,6 +23,7 @@ THE SOFTWARE.
 #include "emufile.h"
 #include "utils/xstring.h"
 
+#include <stdio.h>
 #include <vector>
 
 bool EMUFILE::readAllBytes(std::vector<u8>* dstbuf, const std::string& fname)
@@ -84,7 +85,10 @@ void EMUFILE_FILE::truncate(size_t length)
 	#ifdef _MSC_VER
 		_chsize(_fileno(fp),length);
 	#else
-		ftruncate(fileno(fp),length);
+		if ( ftruncate(fileno(fp),length) != 0 )
+		{
+			printf("Warning: EMUFILE_FILE::truncate failed\n");
+		}
 	#endif
 	// this is probably wrong if mode is "wb"
 	fclose(fp);
diff --git a/src/file.cpp b/src/file.cpp
index 0a18b240..ef3e2c14 100644
--- a/src/file.cpp
+++ b/src/file.cpp
@@ -132,7 +132,10 @@ void ApplyIPS(FILE *ips, FCEUFILE* fp)
 				memset(buf+fp->size,0,offset+size-fp->size);
 				fp->size=offset+size;
 			}
-			fread(buf+offset,1,size,ips);
+			if ( fread(buf+offset,1,size,ips) != static_cast<size_t>(size) )
+			{
+				FCEU_printf(" Warn IPS data read came up short!\n");
+			}
 		}
 		count++;
 	}
diff --git a/src/netplay.cpp b/src/netplay.cpp
index 4d2003ad..bbec7365 100644
--- a/src/netplay.cpp
+++ b/src/netplay.cpp
@@ -122,7 +122,10 @@ int FCEUNET_SendFile(uint8 cmd, char *fn)
 	FCEUX_fstat(fileno(fp),&sb);
 	len = sb.st_size;
 	buf = (char*)FCEU_dmalloc(len); //mbg merge 7/17/06 added cast
-	fread(buf, 1, len, fp);
+	if ( fread(buf, 1, len, fp) != static_cast<size_t>(len) )
+	{
+		FCEU_printf("Warning: FCEUNET_SendFile failed to load complete file.\n");
+	}
 	fclose(fp);
 
 	cbuf = (char*)FCEU_dmalloc(4 + len + len / 1000 + 12); //mbg merge 7/17/06 added cast