Split DOS code in several files.

2025-12-16 19:24:39 +00:00 · 2021-03-09 14:52:09 +00:00
parent d896e638a0
commit 90d64abce2
15 changed files with 1777 additions and 1164 deletions
--- a/setter/src/dos/volume.c
+++ b/setter/src/dos/volume.c
@@ -0,0 +1,106 @@
+/****************************************************************************
+Aaru Data Preservation Suite
+-----------------------------------------------------------------------------
+
+Filename       : dos.c
+Author(s)      : Natalia Portillo
+
+--[ Description ] -----------------------------------------------------------
+
+Contains DOS code
+
+--[ License ] ---------------------------------------------------------------
+     This program is free software: you can redistribute it and/or modify
+     it under the terms of the GNU General Public License as
+     published by the Free Software Foundation, either version 3 of the
+     License, or (at your option) any later version.
+
+     This program is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+     GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+-----------------------------------------------------------------------------
+Copyright (C) 2011-2021 Natalia Portillo
+*****************************************************************************/
+
+#if defined(__DOS__) || defined(MSDOS)
+
+#include <direct.h>
+#include <dos.h>
+#include <i86.h>
+#include <io.h>
+#include <malloc.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "dos.h"
+
+#include "../include/dosos2.h"
+#include "../include/consts.h"
+#include "../include/defs.h"
+
+void GetVolumeInfo(const char* path, size_t* clusterSize)
+{
+    union REGS        regs;
+    struct SREGS      sregs;
+    char              drivePath[4];
+    char              driveNo = path[0] - '@';
+    struct diskfree_t oldFreeSpace;
+    Fat32FreeSpace*   freeSpace = malloc(sizeof(Fat32FreeSpace));
+
+    memset(freeSpace, 0, sizeof(Fat32FreeSpace));
+
+    if(driveNo > 32) driveNo -= 32;
+
+    drivePath[0] = path[0];
+    drivePath[1] = ':';
+    drivePath[2] = '\\';
+    drivePath[3] = 0;
+
+    regs.w.ax = 0x7303;
+    sregs.ds  = FP_SEG(drivePath);
+    regs.w.dx = FP_OFF(drivePath);
+    sregs.es  = FP_SEG(freeSpace);
+    regs.w.di = FP_OFF(freeSpace);
+    regs.w.cx = sizeof(Fat32FreeSpace);
+
+    int86x(0x21, &regs, &regs, &sregs);
+
+    if(regs.h.al == 0 && !regs.w.cflag)
+    {
+        _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;
+    }
+    else if(regs.w.cflag)
+    {
+        printf("Error %d requesting volume information.\n", regs.w.ax);
+        free(freeSpace);
+        return;
+    }
+
+    if(!regs.w.cflag)
+    {
+        printf("\tBytes per sector: %lu\n", freeSpace->bytesPerSector);
+        printf("\tSectors per cluster: %lu (%lu bytes)\n",
+               freeSpace->sectorsPerCluster,
+               freeSpace->sectorsPerCluster * freeSpace->bytesPerSector);
+        printf("\tClusters: %lu (%lu bytes)\n",
+               freeSpace->totalClusters,
+               freeSpace->sectorsPerCluster * freeSpace->bytesPerSector * freeSpace->totalClusters);
+        printf("\tFree clusters: %lu (%lu bytes)\n",
+               freeSpace->freeClusters,
+               freeSpace->sectorsPerCluster * freeSpace->bytesPerSector * freeSpace->freeClusters);
+
+        *clusterSize = freeSpace->sectorsPerCluster * freeSpace->bytesPerSector;
+    }
+}
+
+#endif