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dos_devices.cpp    198 lines (172 with data), 5.5 kB

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/*
* Copyright (C) 2002-2013 The DOSBox Team
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include "dosbox.h"
#include "callback.h"
#include "regs.h"
#include "mem.h"
#include "bios.h"
#include "dos_inc.h"
#include "support.h"
#include "drives.h" //Wildcmp
/* Include all the devices */
#include "dev_con.h"
DOS_Device * Devices[DOS_DEVICES];
class device_NUL : public DOS_Device {
public:
device_NUL() { SetName("NUL"); };
virtual bool Read(Bit8u * data,Bit16u * size) {
for(Bitu i = 0; i < *size;i++)
data[i]=0;
LOG(LOG_IOCTL,LOG_NORMAL)("%s:READ",GetName());
return true;
}
virtual bool Write(Bit8u * data,Bit16u * size) {
LOG(LOG_IOCTL,LOG_NORMAL)("%s:WRITE",GetName());
return true;
}
virtual bool Seek(Bit32u * pos,Bit32u type) {
LOG(LOG_IOCTL,LOG_NORMAL)("%s:SEEK",GetName());
return true;
}
virtual bool Close() { return true; }
virtual Bit16u GetInformation(void) { return 0x8084; }
virtual bool ReadFromControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode){return false;}
virtual bool WriteToControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode){return false;}
};
class device_LPT1 : public device_NUL {
public:
device_LPT1() { SetName("LPT1");}
Bit16u GetInformation(void) { return 0x80A0; }
bool Read(Bit8u* data,Bit16u * size){
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
};
bool DOS_Device::Read(Bit8u * data,Bit16u * size) {
return Devices[devnum]->Read(data,size);
}
bool DOS_Device::Write(Bit8u * data,Bit16u * size) {
return Devices[devnum]->Write(data,size);
}
bool DOS_Device::Seek(Bit32u * pos,Bit32u type) {
return Devices[devnum]->Seek(pos,type);
}
bool DOS_Device::Close() {
return Devices[devnum]->Close();
}
Bit16u DOS_Device::GetInformation(void) {
return Devices[devnum]->GetInformation();
}
bool DOS_Device::ReadFromControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode) {
return Devices[devnum]->ReadFromControlChannel(bufptr,size,retcode);
}
bool DOS_Device::WriteToControlChannel(PhysPt bufptr,Bit16u size,Bit16u * retcode) {
return Devices[devnum]->WriteToControlChannel(bufptr,size,retcode);
}
DOS_File::DOS_File(const DOS_File& orig) {
flags=orig.flags;
time=orig.time;
date=orig.date;
attr=orig.attr;
refCtr=orig.refCtr;
open=orig.open;
hdrive=orig.hdrive;
name=0;
if(orig.name) {
name=new char [strlen(orig.name) + 1];strcpy(name,orig.name);
}
}
DOS_File & DOS_File::operator= (const DOS_File & orig) {
flags=orig.flags;
time=orig.time;
date=orig.date;
attr=orig.attr;
refCtr=orig.refCtr;
open=orig.open;
hdrive=orig.hdrive;
if(name) {
delete [] name; name=0;
}
if(orig.name) {
name=new char [strlen(orig.name) + 1];strcpy(name,orig.name);
}
return *this;
}
Bit8u DOS_FindDevice(char const * name) {
/* should only check for the names before the dot and spacepadded */
char fullname[DOS_PATHLENGTH];Bit8u drive;
// if(!name || !(*name)) return DOS_DEVICES; //important, but makename does it
if (!DOS_MakeName(name,fullname,&drive)) return DOS_DEVICES;
char* name_part = strrchr(fullname,'\\');
if(name_part) {
*name_part++ = 0;
//Check validity of leading directory.
if(!Drives[drive]->TestDir(fullname)) return DOS_DEVICES;
} else name_part = fullname;
char* dot = strrchr(name_part,'.');
if(dot) *dot = 0; //no ext checking
static char com[5] = { 'C','O','M','1',0 };
static char lpt[5] = { 'L','P','T','1',0 };
// AUX is alias for COM1 and PRN for LPT1
// A bit of a hack. (but less then before).
// no need for casecmp as makename returns uppercase
if (strcmp(name_part, "AUX") == 0) name_part = com;
if (strcmp(name_part, "PRN") == 0) name_part = lpt;
/* loop through devices */
for(Bit8u index = 0;index < DOS_DEVICES;index++) {
if (Devices[index]) {
if (WildFileCmp(name_part,Devices[index]->name)) return index;
}
}
return DOS_DEVICES;
}
void DOS_AddDevice(DOS_Device * adddev) {
//Caller creates the device. We store a pointer to it
//TODO Give the Device a real handler in low memory that responds to calls
for(Bitu i = 0; i < DOS_DEVICES;i++) {
if(!Devices[i]){
Devices[i] = adddev;
Devices[i]->SetDeviceNumber(i);
return;
}
}
E_Exit("DOS:Too many devices added");
}
void DOS_DelDevice(DOS_Device * dev) {
// We will destroy the device if we find it in our list.
// TODO:The file table is not checked to see the device is opened somewhere!
for (Bitu i = 0; i <DOS_DEVICES;i++) {
if(Devices[i] && !strcasecmp(Devices[i]->name,dev->name)){
delete Devices[i];
Devices[i] = 0;
return;
}
}
}
void DOS_SetupDevices(void) {
DOS_Device * newdev;
newdev=new device_CON();
DOS_AddDevice(newdev);
DOS_Device * newdev2;
newdev2=new device_NUL();
DOS_AddDevice(newdev2);
DOS_Device * newdev3;
newdev3=new device_LPT1();
DOS_AddDevice(newdev3);
}