From e743059ad2e04d87704733a998b92898bc0134d5 Mon Sep 17 00:00:00 2001
From: Natalia Portillo <claunia@claunia.com>
Date: Tue, 6 Apr 2021 04:15:42 +0100
Subject: [PATCH] Add missing definitions for Borland C++ 2.0.

---
 setter/src/dos/dosdefs.h | 29 ++++++++++++++++++++++++++++-
 setter/src/dos/volume.c  | 22 ++++++++++++++++++++--
 2 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/setter/src/dos/dosdefs.h b/setter/src/dos/dosdefs.h
index 8060d81..0cb1d82 100644
--- a/setter/src/dos/dosdefs.h
+++ b/setter/src/dos/dosdefs.h
@@ -27,10 +27,13 @@ Copyright (C) 2011-2021 Natalia Portillo
 
 #if defined(__WATCOM__)
 #include <direct.h>
-#define __dos_mkdir(a) mkdir(a)
+#define __dos_mkdir(path) mkdir(path)
 #elif defined(__DJGPP__)
 #include <sys/stat.h>
 #define __dos_mkdir(path) mkdir(path, 0)
+#elif defined(__TURBOC__)
+#include <dir.h>
+#define __dos_mkdir(path) mkdir(path)
 #endif
 
 #if defined(__WATCOM__)
@@ -69,6 +72,30 @@ unsigned int _dos_getdiskfree_ex(unsigned int drive, struct diskfree_ex_t* disks
 #define MINUTE(t) ((t & 0x07E0) >> 5)
 #define SECOND(t) ((t & 0x001F) << 1)
 
+#ifndef ENOMEM
+#define ENOMEN 12
+#endif
+
+#ifndef ENOSYS
+#define ENOSYS 38
+#endif
+
+#ifndef EINVAL
+#define EINVAL 22
+#endif
+
+// Seems these were defined starting in Borland C++ 3.0
+#if defined(__BORLANDC__) && __BORLANDC__ <= 0x200
+#include <io.h>
+
+#define _dos_setfileattr(path, attrib) _chmod(path, 1, attrib)
+#define _dos_close(handle) _close(handle)
+#define _dos_setdrive(drivep, ndrives) setdisk(drivep)
+
+unsigned _dos_write(int handle, void far* buf, unsigned len, unsigned* nwritten);
+unsigned _dos_creat(const char* path, int attrib, int* handlep);
+unsigned _dos_creatnew(const char* path, int attrib, int* handlep);
+
 #endif
 
 #endif
\ No newline at end of file
diff --git a/setter/src/dos/volume.c b/setter/src/dos/volume.c
index 00b97f7..66a188e 100644
--- a/setter/src/dos/volume.c
+++ b/setter/src/dos/volume.c
@@ -34,12 +34,20 @@ Copyright (C) 2011-2021 Natalia Portillo
 
 void GetVolumeInfo(const char* path, size_t* clusterSize)
 {
-    char                 driveNo = path[0] - '@';
-    struct diskfree_t    oldFreeSpace;
+    char driveNo = path[0] - '@';
+#ifdef __TURBOC__
+    struct dfree oldFreeSpace;
+#else
+    struct diskfree_t oldFreeSpace;
+#endif
     struct diskfree_ex_t freeSpace;
     unsigned int         rc;
 
+#ifdef __TURBOC__
+    memset(&oldFreeSpace, 0, sizeof(struct dfree));
+#else
     memset(&oldFreeSpace, 0, sizeof(struct diskfree_t));
+#endif
     memset(&freeSpace, 0, sizeof(struct diskfree_ex_t));
 
     if(driveNo > 32) driveNo -= 32;
@@ -50,11 +58,21 @@ void GetVolumeInfo(const char* path, size_t* clusterSize)
     {
         if(errno == ENOSYS)
         {
+#ifdef __TURBOC__
+            getdfree(driveNo, &oldFreeSpace);
+            freeSpace.sectorsPerCluster = oldFreeSpace.df_sclus;
+            freeSpace.freeClusters      = oldFreeSpace.df_avail;
+            freeSpace.bytesPerSector    = oldFreeSpace.df_bsec;
+            freeSpace.totalClusters     = oldFreeSpace.df_total;
+
+            rc = oldFreeSpace.df_sclus == 0xFFFF;
+#else
             rc                          = _dos_getdiskfree(driveNo, &oldFreeSpace);
             freeSpace.sectorsPerCluster = oldFreeSpace.sectors_per_cluster;
             freeSpace.freeClusters      = oldFreeSpace.avail_clusters;
             freeSpace.bytesPerSector    = oldFreeSpace.bytes_per_sector;
             freeSpace.totalClusters     = oldFreeSpace.total_clusters;
+#endif
         }
         else
         {