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Implement call for FAT32 GetDiskFreeEx() for DJGPP.

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Natalia Portillo
2021-03-11 03:35:35 +00:00
parent 351be36e85
commit 55a32327b1
4 changed files with 176 additions and 50 deletions
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76
setter/src/dos/volume.c
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@@ -29,79 +29,61 @@ Copyright (C) 2011-2021 Natalia Portillo
#if defined(__DOS__) || defined(MSDOS)
#include <direct.h>
#include <dos.h>
#include <io.h>
#include <malloc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if defined(__WATCOM__)
#include <i86.h>
#endif
#include "../include/consts.h"
#include "../include/defs.h"
#include "../include/dosos2.h"
#include "dos.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));
struct diskfree_ex_t freeSpace;
unsigned int ret;
memset(freeSpace, 0, sizeof(Fat32FreeSpace));
memset(&oldFreeSpace, 0, sizeof(struct diskfree_t));
memset(&freeSpace, 0, sizeof(struct diskfree_ex_t));
if(driveNo > 32) driveNo -= 32;
drivePath[0] = path[0];
drivePath[1] = ':';
drivePath[2] = '\\';
drivePath[3] = 0;
ret = _dos_getdiskfree_ex(driveNo, &freeSpace);
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)
if(ret)
{
_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(errno == ENOSYS)
{
ret = _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
{
printf("Error %d requesting volume information.\n", _doserrno);
return;
}
}
if(!regs.w.cflag)
if(ret == 0)
{
printf("\tBytes per sector: %lu\n", freeSpace->bytesPerSector);
printf("\tBytes per sector: %lu\n", freeSpace.bytesPerSector);
printf("\tSectors per cluster: %lu (%lu bytes)\n",
freeSpace->sectorsPerCluster,
freeSpace->sectorsPerCluster * freeSpace->bytesPerSector);
freeSpace.sectorsPerCluster,
freeSpace.sectorsPerCluster * freeSpace.bytesPerSector);
printf("\tClusters: %lu (%lu bytes)\n",
freeSpace->totalClusters,
freeSpace->sectorsPerCluster * freeSpace->bytesPerSector * freeSpace->totalClusters);
freeSpace.totalClusters,
freeSpace.sectorsPerCluster * freeSpace.bytesPerSector * freeSpace.totalClusters);
printf("\tFree clusters: %lu (%lu bytes)\n",
freeSpace->freeClusters,
freeSpace->sectorsPerCluster * freeSpace->bytesPerSector * freeSpace->freeClusters);
freeSpace.freeClusters,
freeSpace.sectorsPerCluster * freeSpace.bytesPerSector * freeSpace.freeClusters);
*clusterSize = freeSpace->sectorsPerCluster * freeSpace->bytesPerSector;
*clusterSize = freeSpace.sectorsPerCluster * freeSpace.bytesPerSector;
}
}