From 5f006a5aa87bcd1777ae4448d80f9b67e94253b4 Mon Sep 17 00:00:00 2001
From: maron2000 <68574602+maron2000@users.noreply.github.com>
Date: Fri, 30 Jun 2023 09:55:28 +0900
Subject: [PATCH] Fix IMGMAKE large size image error (MinGW)

---
 CHANGELOG                |  1 +
 src/dos/dos_programs.cpp | 20 ++++++++++----------
 2 files changed, 11 insertions(+), 10 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 296b708a833..ec176603d73 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -42,6 +42,7 @@ Next
     allocated block position. (maxpat78)
   - Enhanced Dynamic and Differencing VHD support #4273 (maxpat78)
   - Imported IBM Music Feature Card support from DOSBox Staging. (Allofich)
+  - Fix IMGMAKE large size image error on MinGW builds (maron2000) 
 2023.05.01
   - IMGMAKE will choose LBA partition types for 2GB or larger disk
     images, but the user can also use -chs and -lba options to override
diff --git a/src/dos/dos_programs.cpp b/src/dos/dos_programs.cpp
index 5ce58de5634..182878dd1f2 100644
--- a/src/dos/dos_programs.cpp
+++ b/src/dos/dos_programs.cpp
@@ -3542,7 +3542,7 @@ class IMGMAKE : public Program {
                 return;
             }
 
-#if defined (_MSC_VER) && (_MSC_VER >= 1400)
+#if (defined (_MSC_VER) && (_MSC_VER >= 1400)) || defined(__MINGW32__)
             if(fseeko64(f, (__int64)(size - 1ull), SEEK_SET)) {
 #else
             if(fseeko64(f, static_cast<off_t>(size - 1ull), SEEK_SET)) {
@@ -3568,8 +3568,8 @@ class IMGMAKE : public Program {
             unsigned int sectors_per_cluster = 0;
             unsigned int vol_sectors = 0;
             unsigned int fat_copies = 2; /* number of copies of the FAT. always 2. TODO: Allow the user to specify */
-            unsigned int fatlimitmin;
-            unsigned int fatlimit;
+            uint32_t fatlimitmin;
+            uint32_t fatlimit;
             int FAT = -1;
 
             /* FAT filesystem, user choice */
@@ -3655,16 +3655,16 @@ class IMGMAKE : public Program {
             /* highest cluster number + 1 */
             switch (FAT) {
                 case 32:
-                    fatlimit = 0x0FFFFFF6;
-                    fatlimitmin = 0xFFF6;
+                    fatlimit = 0x0FFFFFF6u;
+                    fatlimitmin = 0xFFF6u;
                     break;
                 case 16:
-                    fatlimit = 0xFFF6;
-                    fatlimitmin = 0xFF6;
+                    fatlimit = 0xFFF6u;
+                    fatlimitmin = 0xFF6u;
                     break;
                 case 12:
-                    fatlimit = 0xFF6;
-                    fatlimitmin = 0;
+                    fatlimit = 0xFF6u;
+                    fatlimitmin = 0u;
                     break;
                 default:
                     abort();
@@ -9385,7 +9385,7 @@ void DOS_SetupPrograms(void) {
 #endif
     MSG_Add("PROGRAM_IMGMAKE_FILE_EXISTS","The file \"%s\" already exists. You can specify \"-force\" to overwrite.\n");
     MSG_Add("PROGRAM_IMGMAKE_CANNOT_WRITE","The file \"%s\" cannot be opened for writing.\n");
-    MSG_Add("PROGRAM_IMGMAKE_NOT_ENOUGH_SPACE","Not enough space available for the image file. Need %u bytes.\n");
+    MSG_Add("PROGRAM_IMGMAKE_NOT_ENOUGH_SPACE","Not enough space available for the image file. Need %lld bytes.\n");
     MSG_Add("PROGRAM_IMGMAKE_PRINT_CHS","Creating image file \"%s\" with %u cylinders, %u heads and %u sectors\n");
     MSG_Add("PROGRAM_IMGMAKE_CANT_READ_FLOPPY","\n\nUnable to read floppy.");
     MSG_Add("PROGRAM_IMGMAKE_BADSIZE","Wrong -size or -chs arguments.\n");