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dosbox-wii/src/dos/dos_files.cpp

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sync to DOSBox SVN r3654
2010-11-05 05:55:33 +01:00
/*
* Copyright (C) 2002-2010 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.
*/
/* $Id: dos_files.cpp,v 1.113 2009-08-31 18:03:08 qbix79 Exp $ */
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>
#include "dosbox.h"
#include "bios.h"
#include "mem.h"
#include "regs.h"
#include "dos_inc.h"
#include "drives.h"
#include "cross.h"
#define DOS_FILESTART 4
#define FCB_SUCCESS 0
#define FCB_READ_NODATA 1
#define FCB_READ_PARTIAL 3
#define FCB_ERR_NODATA 1
#define FCB_ERR_EOF 3
#define FCB_ERR_WRITE 1
DOS_File * Files[DOS_FILES];
DOS_Drive * Drives[DOS_DRIVES];
Bit8u DOS_GetDefaultDrive(void) {
// return DOS_SDA(DOS_SDA_SEG,DOS_SDA_OFS).GetDrive();
Bit8u d = DOS_SDA(DOS_SDA_SEG,DOS_SDA_OFS).GetDrive();
if( d != dos.current_drive ) LOG(LOG_DOSMISC,LOG_ERROR)("SDA drive %d not the same as dos.current_drive %d",d,dos.current_drive);
return dos.current_drive;
}
void DOS_SetDefaultDrive(Bit8u drive) {
// if (drive<=DOS_DRIVES && ((drive<2) || Drives[drive])) DOS_SDA(DOS_SDA_SEG,DOS_SDA_OFS).SetDrive(drive);
if (drive<=DOS_DRIVES && ((drive<2) || Drives[drive])) {dos.current_drive = drive; DOS_SDA(DOS_SDA_SEG,DOS_SDA_OFS).SetDrive(drive);}
}
bool DOS_MakeName(char const * const name,char * const fullname,Bit8u * drive) {
if(!name || *name == 0 || *name == ' ') {
/* Both \0 and space are seperators and
* empty filenames report file not found */
DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
const char * name_int = name;
char tempdir[DOS_PATHLENGTH];
char upname[DOS_PATHLENGTH];
Bitu r,w;
*drive = DOS_GetDefaultDrive();
/* First get the drive */
if (name_int[1]==':') {
*drive=(name_int[0] | 0x20)-'a';
name_int+=2;
}
if (*drive>=DOS_DRIVES || !Drives[*drive]) {
DOS_SetError(DOSERR_PATH_NOT_FOUND);
return false;
}
r=0;w=0;
while (name_int[r]!=0 && (r<DOS_PATHLENGTH)) {
Bit8u c=name_int[r++];
if ((c>='a') && (c<='z')) {upname[w++]=c-32;continue;}
if ((c>='A') && (c<='Z')) {upname[w++]=c;continue;}
if ((c>='0') && (c<='9')) {upname[w++]=c;continue;}
switch (c) {
case '/':
upname[w++]='\\';
break;
case ' ': /* should be seperator */
break;
case '\\': case '$': case '#': case '@': case '(': case ')':
case '!': case '%': case '{': case '}': case '`': case '~':
case '_': case '-': case '.': case '*': case '?': case '&':
case '\'': case '+': case '^': case 246: case 255: case 0xa0:
case 0xe5: case 0xbd:
upname[w++]=c;
break;
default:
LOG(LOG_FILES,LOG_NORMAL)("Makename encountered an illegal char %c hex:%X in %s!",c,c,name);
DOS_SetError(DOSERR_PATH_NOT_FOUND);return false;
break;
}
}
if (r>=DOS_PATHLENGTH) { DOS_SetError(DOSERR_PATH_NOT_FOUND);return false; }
upname[w]=0;
/* Now parse the new file name to make the final filename */
if (upname[0]!='\\') strcpy(fullname,Drives[*drive]->curdir);
else fullname[0]=0;
Bit32u lastdir=0;Bit32u t=0;
while (fullname[t]!=0) {
if ((fullname[t]=='\\') && (fullname[t+1]!=0)) lastdir=t;
t++;
};
r=0;w=0;
tempdir[0]=0;
bool stop=false;
while (!stop) {
if (upname[r]==0) stop=true;
if ((upname[r]=='\\') || (upname[r]==0)){
tempdir[w]=0;
if (tempdir[0]==0) { w=0;r++;continue;}
if (strcmp(tempdir,".")==0) {
tempdir[0]=0;
w=0;r++;
continue;
}
Bit32s iDown;
bool dots = true;
Bit32s templen=(Bit32s)strlen(tempdir);
for(iDown=0;(iDown < templen) && dots;iDown++)
if(tempdir[iDown] != '.')
dots = false;
// only dots?
if (dots && (templen > 1)) {
Bit32s cDots = templen - 1;
for(iDown=(Bit32s)strlen(fullname)-1;iDown>=0;iDown--) {
if(fullname[iDown]=='\\' || iDown==0) {
lastdir = iDown;
cDots--;
if(cDots==0)
break;
}
}
fullname[lastdir]=0;
t=0;lastdir=0;
while (fullname[t]!=0) {
if ((fullname[t]=='\\') && (fullname[t+1]!=0)) lastdir=t;
t++;
}
tempdir[0]=0;
w=0;r++;
continue;
}
lastdir=(Bit32u)strlen(fullname);
if (lastdir!=0) strcat(fullname,"\\");
char * ext=strchr(tempdir,'.');
if (ext) {
if(strchr(ext+1,'.')) {
//another dot in the extension =>file not found
//Or path not found depending on wether
//we are still in dir check stage or file stage
if(stop)
DOS_SetError(DOSERR_FILE_NOT_FOUND);
else
DOS_SetError(DOSERR_PATH_NOT_FOUND);
return false;
}
ext[4] = 0;
if((strlen(tempdir) - strlen(ext)) > 8) memmove(tempdir + 8, ext, 5);
} else tempdir[8]=0;
if (strlen(fullname)+strlen(tempdir)>=DOS_PATHLENGTH) {
DOS_SetError(DOSERR_PATH_NOT_FOUND);return false;
}
strcat(fullname,tempdir);
tempdir[0]=0;
w=0;r++;
continue;
}
tempdir[w++]=upname[r++];
}
return true;
}
bool DOS_GetCurrentDir(Bit8u drive,char * const buffer) {
if (drive==0) drive=DOS_GetDefaultDrive();
else drive--;
if ((drive>=DOS_DRIVES) || (!Drives[drive])) {
DOS_SetError(DOSERR_INVALID_DRIVE);
return false;
}
strcpy(buffer,Drives[drive]->curdir);
return true;
}
bool DOS_ChangeDir(char const * const dir) {
Bit8u drive;char fulldir[DOS_PATHLENGTH];
const char * testdir=dir;
if (strlen(testdir) && testdir[1]==':') testdir+=2;
size_t len=strlen(testdir);
if (!len || (len>1 && testdir[len-1]=='\\')) {
DOS_SetError(DOSERR_PATH_NOT_FOUND);
return false;
}
if (!DOS_MakeName(dir,fulldir,&drive)) return false;
if (Drives[drive]->TestDir(fulldir)) {
strcpy(Drives[drive]->curdir,fulldir);
return true;
} else {
DOS_SetError(DOSERR_PATH_NOT_FOUND);
}
return false;
}
bool DOS_MakeDir(char const * const dir) {
Bit8u drive;char fulldir[DOS_PATHLENGTH];
size_t len = strlen(dir);
if(!len || dir[len-1] == '\\') {
DOS_SetError(DOSERR_PATH_NOT_FOUND);
return false;
}
if (!DOS_MakeName(dir,fulldir,&drive)) return false;
if(Drives[drive]->MakeDir(fulldir)) return true;
/* Determine reason for failing */
if(Drives[drive]->TestDir(fulldir))
DOS_SetError(DOSERR_ACCESS_DENIED);
else
DOS_SetError(DOSERR_PATH_NOT_FOUND);
return false;
}
bool DOS_RemoveDir(char const * const dir) {
/* We need to do the test before the removal as can not rely on
* the host to forbid removal of the current directory.
* We never change directory. Everything happens in the drives.
*/
Bit8u drive;char fulldir[DOS_PATHLENGTH];
if (!DOS_MakeName(dir,fulldir,&drive)) return false;
/* Check if exists */
if(!Drives[drive]->TestDir(fulldir)) {
DOS_SetError(DOSERR_PATH_NOT_FOUND);
return false;
}
/* See if it's current directory */
char currdir[DOS_PATHLENGTH]= { 0 };
DOS_GetCurrentDir(drive + 1 ,currdir);
if(strcmp(currdir,fulldir) == 0) {
DOS_SetError(DOSERR_REMOVE_CURRENT_DIRECTORY);
return false;
}
if(Drives[drive]->RemoveDir(fulldir)) return true;
/* Failed. We know it exists and it's not the current dir */
/* Assume non empty */
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
bool DOS_Rename(char const * const oldname,char const * const newname) {
Bit8u driveold;char fullold[DOS_PATHLENGTH];
Bit8u drivenew;char fullnew[DOS_PATHLENGTH];
if (!DOS_MakeName(oldname,fullold,&driveold)) return false;
if (!DOS_MakeName(newname,fullnew,&drivenew)) return false;
/* No tricks with devices */
if ( (DOS_FindDevice(oldname) != DOS_DEVICES) ||
(DOS_FindDevice(newname) != DOS_DEVICES) ) {
DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
/* Must be on the same drive */
if(driveold != drivenew) {
DOS_SetError(DOSERR_NOT_SAME_DEVICE);
return false;
}
/*Test if target exists => no access */
Bit16u attr;
if(Drives[drivenew]->GetFileAttr(fullnew,&attr)) {
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
/* Source must exist, check for path ? */
if (!Drives[driveold]->GetFileAttr( fullold, &attr ) ) {
DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
if (Drives[drivenew]->Rename(fullold,fullnew)) return true;
/* If it still fails. which error should we give ? PATH NOT FOUND or EACCESS */
LOG(LOG_FILES,LOG_NORMAL)("Rename fails for %s to %s, no proper errorcode returned.",oldname,newname);
DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
bool DOS_FindFirst(char * search,Bit16u attr,bool fcb_findfirst) {
DOS_DTA dta(dos.dta());
Bit8u drive;char fullsearch[DOS_PATHLENGTH];
char dir[DOS_PATHLENGTH];char pattern[DOS_PATHLENGTH];
size_t len = strlen(search);
if(len && search[len - 1] == '\\' && !( (len > 2) && (search[len - 2] == ':') && (attr == DOS_ATTR_VOLUME) )) {
//Dark Forces installer, but c:\ is allright for volume labels(exclusively set)
DOS_SetError(DOSERR_NO_MORE_FILES);
return false;
}
if (!DOS_MakeName(search,fullsearch,&drive)) return false;
//Check for devices. FindDevice checks for leading subdir as well
bool device = (DOS_FindDevice(search) != DOS_DEVICES);
/* Split the search in dir and pattern */
char * find_last;
find_last=strrchr(fullsearch,'\\');
if (!find_last) { /*No dir */
strcpy(pattern,fullsearch);
dir[0]=0;
} else {
*find_last=0;
strcpy(pattern,find_last+1);
strcpy(dir,fullsearch);
}
dta.SetupSearch(drive,(Bit8u)attr,pattern);
if(device) {
find_last = strrchr(pattern,'.');
if(find_last) *find_last = 0;
//TODO use current date and time
dta.SetResult(pattern,0,0,0,DOS_ATTR_DEVICE);
LOG(LOG_DOSMISC,LOG_WARN)("finding device %s",pattern);
return true;
}
if (Drives[drive]->FindFirst(dir,dta,fcb_findfirst)) return true;
return false;
}
bool DOS_FindNext(void) {
DOS_DTA dta(dos.dta());
Bit8u i = dta.GetSearchDrive();
if(i >= DOS_DRIVES || !Drives[i]) {
/* Corrupt search. */
LOG(LOG_FILES,LOG_ERROR)("Corrupt search!!!!");
DOS_SetError(DOSERR_NO_MORE_FILES);
return false;
}
if (Drives[i]->FindNext(dta)) return true;
return false;
}
bool DOS_ReadFile(Bit16u entry,Bit8u * data,Bit16u * amount) {
Bit32u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle] || !Files[handle]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
/*
if ((Files[handle]->flags & 0x0f) == OPEN_WRITE)) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
}
*/
Bit16u toread=*amount;
bool ret=Files[handle]->Read(data,&toread);
*amount=toread;
return ret;
}
bool DOS_WriteFile(Bit16u entry,Bit8u * data,Bit16u * amount) {
Bit32u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle] || !Files[handle]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
/*
if ((Files[handle]->flags & 0x0f) == OPEN_READ)) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
}
*/
Bit16u towrite=*amount;
bool ret=Files[handle]->Write(data,&towrite);
*amount=towrite;
return ret;
}
bool DOS_SeekFile(Bit16u entry,Bit32u * pos,Bit32u type) {
Bit32u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle] || !Files[handle]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
return Files[handle]->Seek(pos,type);
}
bool DOS_CloseFile(Bit16u entry) {
Bit32u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle]) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (Files[handle]->IsOpen()) {
Files[handle]->Close();
}
DOS_PSP psp(dos.psp());
psp.SetFileHandle(entry,0xff);
if (Files[handle]->RemoveRef()<=0) {
delete Files[handle];
Files[handle]=0;
}
return true;
}
bool DOS_FlushFile(Bit16u entry) {
Bit32u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle] || !Files[handle]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
LOG(LOG_DOSMISC,LOG_NORMAL)("FFlush used.");
return true;
}
static bool PathExists(char const * const name) {
const char* leading = strrchr(name,'\\');
if(!leading) return true;
char temp[CROSS_LEN];
strcpy(temp,name);
char * lead = strrchr(temp,'\\');
if (lead == temp) return true;
*lead = 0;
Bit8u drive;char fulldir[DOS_PATHLENGTH];
if (!DOS_MakeName(temp,fulldir,&drive)) return false;
if(!Drives[drive]->TestDir(fulldir)) return false;
return true;
}
bool DOS_CreateFile(char const * name,Bit16u attributes,Bit16u * entry) {
// Creation of a device is the same as opening it
// Tc201 installer
if (DOS_FindDevice(name) != DOS_DEVICES)
return DOS_OpenFile(name, OPEN_READ, entry);
LOG(LOG_FILES,LOG_NORMAL)("file create attributes %X file %s",attributes,name);
char fullname[DOS_PATHLENGTH];Bit8u drive;
DOS_PSP psp(dos.psp());
if (!DOS_MakeName(name,fullname,&drive)) return false;
/* Check for a free file handle */
Bit8u handle=DOS_FILES;Bit8u i;
for (i=0;i<DOS_FILES;i++) {
if (!Files[i]) {
handle=i;
break;
}
}
if (handle==DOS_FILES) {
DOS_SetError(DOSERR_TOO_MANY_OPEN_FILES);
return false;
}
/* We have a position in the main table now find one in the psp table */
*entry = psp.FindFreeFileEntry();
if (*entry==0xff) {
DOS_SetError(DOSERR_TOO_MANY_OPEN_FILES);
return false;
}
/* Don't allow directories to be created */
if (attributes&DOS_ATTR_DIRECTORY) {
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
bool foundit=Drives[drive]->FileCreate(&Files[handle],fullname,attributes);
if (foundit) {
Files[handle]->SetDrive(drive);
Files[handle]->AddRef();
psp.SetFileHandle(*entry,handle);
return true;
} else {
if(!PathExists(name)) DOS_SetError(DOSERR_PATH_NOT_FOUND);
else DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
}
bool DOS_OpenFile(char const * name,Bit8u flags,Bit16u * entry) {
/* First check for devices */
if (flags>2) LOG(LOG_FILES,LOG_ERROR)("Special file open command %X file %s",flags,name);
else LOG(LOG_FILES,LOG_NORMAL)("file open command %X file %s",flags,name);
DOS_PSP psp(dos.psp());
Bit16u attr = 0;
Bit8u devnum = DOS_FindDevice(name);
bool device = (devnum != DOS_DEVICES);
if(!device && DOS_GetFileAttr(name,&attr)) {
//DON'T ALLOW directories to be openened.(skip test if file is device).
if((attr & DOS_ATTR_DIRECTORY) || (attr & DOS_ATTR_VOLUME)){
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
}
char fullname[DOS_PATHLENGTH];Bit8u drive;Bit8u i;
/* First check if the name is correct */
if (!DOS_MakeName(name,fullname,&drive)) return false;
Bit8u handle=255;
/* Check for a free file handle */
for (i=0;i<DOS_FILES;i++) {
if (!Files[i]) {
handle=i;
break;
}
}
if (handle==255) {
DOS_SetError(DOSERR_TOO_MANY_OPEN_FILES);
return false;
}
/* We have a position in the main table now find one in the psp table */
*entry = psp.FindFreeFileEntry();
if (*entry==0xff) {
DOS_SetError(DOSERR_TOO_MANY_OPEN_FILES);
return false;
}
bool exists=false;
if (device) {
Files[handle]=new DOS_Device(*Devices[devnum]);
} else {
exists=Drives[drive]->FileOpen(&Files[handle],fullname,flags);
if (exists) Files[handle]->SetDrive(drive);
}
if (exists || device ) {
Files[handle]->AddRef();
psp.SetFileHandle(*entry,handle);
return true;
} else {
//Test if file exists, but opened in read-write mode (and writeprotected)
if(((flags&3) != OPEN_READ) && Drives[drive]->FileExists(fullname))
DOS_SetError(DOSERR_ACCESS_DENIED);
else {
if(!PathExists(name)) DOS_SetError(DOSERR_PATH_NOT_FOUND);
else DOS_SetError(DOSERR_FILE_NOT_FOUND);
}
return false;
}
}
bool DOS_OpenFileExtended(char const * name, Bit16u flags, Bit16u createAttr, Bit16u action, Bit16u *entry, Bit16u* status) {
// FIXME: Not yet supported : Bit 13 of flags (int 0x24 on critical error)
Bit16u result = 0;
if (action==0) {
// always fail setting
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
} else {
if (((action & 0x0f)>2) || ((action & 0xf0)>0x10)) {
// invalid action parameter
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
return false;
}
}
if (DOS_OpenFile(name, (Bit8u)(flags&0xff), entry)) {
// File already exists
switch (action & 0x0f) {
case 0x00: // failed
DOS_SetError(DOSERR_FILE_ALREADY_EXISTS);
return false;
case 0x01: // file open (already done)
result = 1;
break;
case 0x02: // replace
DOS_CloseFile(*entry);
if (!DOS_CreateFile(name, createAttr, entry)) return false;
result = 3;
break;
default:
DOS_SetError(DOSERR_FUNCTION_NUMBER_INVALID);
E_Exit("DOS: OpenFileExtended: Unknown action.");
break;
}
} else {
// File doesn't exist
if ((action & 0xf0)==0) {
// uses error code from failed open
return false;
}
// Create File
if (!DOS_CreateFile(name, createAttr, entry)) {
// uses error code from failed create
return false;
}
result = 2;
}
// success
*status = result;
return true;
}
bool DOS_UnlinkFile(char const * const name) {
char fullname[DOS_PATHLENGTH];Bit8u drive;
if (!DOS_MakeName(name,fullname,&drive)) return false;
if(Drives[drive]->FileUnlink(fullname)){
return true;
} else {
DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
}
bool DOS_GetFileAttr(char const * const name,Bit16u * attr) {
char fullname[DOS_PATHLENGTH];Bit8u drive;
if (!DOS_MakeName(name,fullname,&drive)) return false;
if (Drives[drive]->GetFileAttr(fullname,attr)) {
return true;
} else {
DOS_SetError(DOSERR_FILE_NOT_FOUND);
return false;
}
}
bool DOS_SetFileAttr(char const * const name,Bit16u /*attr*/)
// this function does not change the file attributs
// it just does some tests if file is available
// returns false when using on cdrom (stonekeep)
{
Bit16u attrTemp;
char fullname[DOS_PATHLENGTH];Bit8u drive;
if (!DOS_MakeName(name,fullname,&drive)) return false;
if (strncmp(Drives[drive]->GetInfo(),"CDRom ",6)==0 || strncmp(Drives[drive]->GetInfo(),"isoDrive ",9)==0) {
DOS_SetError(DOSERR_ACCESS_DENIED);
return false;
}
return Drives[drive]->GetFileAttr(fullname,&attrTemp);
}
bool DOS_Canonicalize(char const * const name,char * const big) {
//TODO Add Better support for devices and shit but will it be needed i doubt it :)
Bit8u drive;
char fullname[DOS_PATHLENGTH];
if (!DOS_MakeName(name,fullname,&drive)) return false;
big[0]=drive+'A';
big[1]=':';
big[2]='\\';
strcpy(&big[3],fullname);
return true;
}
bool DOS_GetFreeDiskSpace(Bit8u drive,Bit16u * bytes,Bit8u * sectors,Bit16u * clusters,Bit16u * free) {
if (drive==0) drive=DOS_GetDefaultDrive();
else drive--;
if ((drive>=DOS_DRIVES) || (!Drives[drive])) {
DOS_SetError(DOSERR_INVALID_DRIVE);
return false;
}
return Drives[drive]->AllocationInfo(bytes,sectors,clusters,free);
}
bool DOS_DuplicateEntry(Bit16u entry,Bit16u * newentry) {
// Dont duplicate console handles
/* if (entry<=STDPRN) {
*newentry = entry;
return true;
};
*/
Bit8u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle] || !Files[handle]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
DOS_PSP psp(dos.psp());
*newentry = psp.FindFreeFileEntry();
if (*newentry==0xff) {
DOS_SetError(DOSERR_TOO_MANY_OPEN_FILES);
return false;
}
Files[handle]->AddRef();
psp.SetFileHandle(*newentry,handle);
return true;
}
bool DOS_ForceDuplicateEntry(Bit16u entry,Bit16u newentry) {
if(entry == newentry) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
}
Bit8u orig = RealHandle(entry);
if (orig >= DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[orig] || !Files[orig]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
Bit8u newone = RealHandle(newentry);
if (newone < DOS_FILES && Files[newone]) {
DOS_CloseFile(newentry);
}
DOS_PSP psp(dos.psp());
Files[orig]->AddRef();
psp.SetFileHandle(newentry,orig);
return true;
}
bool DOS_CreateTempFile(char * const name,Bit16u * entry) {
size_t namelen=strlen(name);
char * tempname=name+namelen;
if (namelen==0) {
// temp file created in root directory
tempname[0]='\\';
tempname++;
} else {
if ((name[namelen-1]!='\\') && (name[namelen-1]!='/')) {
tempname[0]='\\';
tempname++;
}
}
dos.errorcode=0;
/* add random crap to the end of the name and try to open */
do {
Bit32u i;
for (i=0;i<8;i++) {
tempname[i]=(rand()%26)+'A';
}
tempname[8]=0;
} while ((!DOS_CreateFile(name,0,entry)) && (dos.errorcode==DOSERR_FILE_ALREADY_EXISTS));
if (dos.errorcode) return false;
return true;
}
#define FCB_SEP ":.;,=+"
#define ILLEGAL ":.;,=+ \t/\"[]<>|"
static bool isvalid(const char in){
const char ill[]=ILLEGAL;
return (Bit8u(in)>0x1F) && (!strchr(ill,in));
}
#define PARSE_SEP_STOP 0x01
#define PARSE_DFLT_DRIVE 0x02
#define PARSE_BLNK_FNAME 0x04
#define PARSE_BLNK_FEXT 0x08
#define PARSE_RET_NOWILD 0
#define PARSE_RET_WILD 1
#define PARSE_RET_BADDRIVE 0xff
Bit8u FCB_Parsename(Bit16u seg,Bit16u offset,Bit8u parser ,char *string, Bit8u *change) {
char * string_begin=string;
Bit8u ret=0;
if (!(parser & PARSE_DFLT_DRIVE)) {
// default drive forced, this intentionally invalidates an extended FCB
mem_writeb(PhysMake(seg,offset),0);
}
DOS_FCB fcb(seg,offset,false); // always a non-extended FCB
bool hasdrive,hasname,hasext,finished;
hasdrive=hasname=hasext=finished=false;
Bitu index=0;
Bit8u fill=' ';
/* First get the old data from the fcb */
#ifdef _MSC_VER
#pragma pack (1)
#endif
union {
struct {
char drive[2];
char name[9];
char ext[4];
} GCC_ATTRIBUTE (packed) part;
char full[DOS_FCBNAME];
} fcb_name;
#ifdef _MSC_VER
#pragma pack()
#endif
/* Get the old information from the previous fcb */
fcb.GetName(fcb_name.full);
fcb_name.part.drive[0]-='A'-1;fcb_name.part.drive[1]=0;
fcb_name.part.name[8]=0;fcb_name.part.ext[3]=0;
/* Strip of the leading sepetaror */
if((parser & PARSE_SEP_STOP) && *string) { //ignore leading seperator
char sep[] = FCB_SEP;char a[2];
a[0]= *string;a[1]='\0';
if (strcspn(a,sep)==0) string++;
}
/* strip leading spaces */
while((*string==' ')||(*string=='\t')) string++;
/* Check for a drive */
if (string[1]==':') {
fcb_name.part.drive[0]=0;
hasdrive=true;
if (isalpha(string[0]) && Drives[toupper(string[0])-'A']) {
fcb_name.part.drive[0]=(char)(toupper(string[0])-'A'+1);
} else ret=0xff;
string+=2;
}
/* Special checks for . and .. */
if (string[0]=='.') {
string++;
if (!string[0]) {
hasname=true;
ret=PARSE_RET_NOWILD;
strcpy(fcb_name.part.name,". ");
goto savefcb;
}
if (string[1]=='.' && !string[1]) {
string++;
hasname=true;
ret=PARSE_RET_NOWILD;
strcpy(fcb_name.part.name,".. ");
goto savefcb;
}
goto checkext;
}
/* Copy the name */
hasname=true;finished=false;fill=' ';index=0;
while (index<8) {
if (!finished) {
if (string[0]=='*') {fill='?';fcb_name.part.name[index]='?';if (!ret) ret=1;finished=true;}
else if (string[0]=='?') {fcb_name.part.name[index]='?';if (!ret) ret=1;}
else if (isvalid(string[0])) {fcb_name.part.name[index]=(char)(toupper(string[0]));}
else { finished=true;continue; }
string++;
} else {
fcb_name.part.name[index]=fill;
}
index++;
}
if (!(string[0]=='.')) goto savefcb;
string++;
checkext:
/* Copy the extension */
hasext=true;finished=false;fill=' ';index=0;
while (index<3) {
if (!finished) {
if (string[0]=='*') {fill='?';fcb_name.part.ext[index]='?';finished=true;}
else if (string[0]=='?') {fcb_name.part.ext[index]='?';if (!ret) ret=1;}
else if (isvalid(string[0])) {fcb_name.part.ext[index]=(char)(toupper(string[0]));}
else { finished=true;continue; }
string++;
} else {
fcb_name.part.ext[index]=fill;
}
index++;
}
savefcb:
if (!hasdrive & !(parser & PARSE_DFLT_DRIVE)) fcb_name.part.drive[0] = 0;
if (!hasname & !(parser & PARSE_BLNK_FNAME)) strcpy(fcb_name.part.name," ");
if (!hasext & !(parser & PARSE_BLNK_FEXT)) strcpy(fcb_name.part.ext," ");
fcb.SetName(fcb_name.part.drive[0],fcb_name.part.name,fcb_name.part.ext);
*change=(Bit8u)(string-string_begin);
return ret;
}
static void DTAExtendName(char * const name,char * const filename,char * const ext) {
char * find=strchr(name,'.');
if (find) {
strcpy(ext,find+1);
*find=0;
} else ext[0]=0;
strcpy(filename,name);
size_t i;
for (i=strlen(name);i<8;i++) filename[i]=' ';
filename[8]=0;
for (i=strlen(ext);i<3;i++) ext[i]=' ';
ext[3]=0;
}
static void SaveFindResult(DOS_FCB & find_fcb) {
DOS_DTA find_dta(dos.tables.tempdta);
char name[DOS_NAMELENGTH_ASCII];Bit32u size;Bit16u date;Bit16u time;Bit8u attr;Bit8u drive;
char file_name[9];char ext[4];
find_dta.GetResult(name,size,date,time,attr);
drive=find_fcb.GetDrive()+1;
/* Create a correct file and extention */
DTAExtendName(name,file_name,ext);
DOS_FCB fcb(RealSeg(dos.dta()),RealOff(dos.dta()));//TODO
fcb.Create(find_fcb.Extended());
fcb.SetName(drive,file_name,ext);
fcb.SetAttr(attr); /* Only adds attribute if fcb is extended */
fcb.SetSizeDateTime(size,date,time);
}
bool DOS_FCBCreate(Bit16u seg,Bit16u offset) {
DOS_FCB fcb(seg,offset);
char shortname[DOS_FCBNAME];Bit16u handle;
fcb.GetName(shortname);
if (!DOS_CreateFile(shortname,DOS_ATTR_ARCHIVE,&handle)) return false;
fcb.FileOpen((Bit8u)handle);
return true;
}
bool DOS_FCBOpen(Bit16u seg,Bit16u offset) {
DOS_FCB fcb(seg,offset);
char shortname[DOS_FCBNAME];Bit16u handle;
fcb.GetName(shortname);
/* First check if the name is correct */
Bit8u drive;
char fullname[DOS_PATHLENGTH];
if (!DOS_MakeName(shortname,fullname,&drive)) return false;
/* Check, if file is already opened */
for (Bit8u i=0;i<DOS_FILES;i++) {
DOS_PSP psp(dos.psp());
if (Files[i] && Files[i]->IsOpen() && Files[i]->IsName(fullname)) {
handle = psp.FindEntryByHandle(i);
if (handle==0xFF) {
// This shouldnt happen
LOG(LOG_FILES,LOG_ERROR)("DOS: File %s is opened but has no psp entry.",shortname);
return false;
}
fcb.FileOpen((Bit8u)handle);
return true;
}
}
if (!DOS_OpenFile(shortname,OPEN_READWRITE,&handle)) return false;
fcb.FileOpen((Bit8u)handle);
return true;
}
bool DOS_FCBClose(Bit16u seg,Bit16u offset) {
DOS_FCB fcb(seg,offset);
if(!fcb.Valid()) return false;
Bit8u fhandle;
fcb.FileClose(fhandle);
DOS_CloseFile(fhandle);
return true;
}
bool DOS_FCBFindFirst(Bit16u seg,Bit16u offset) {
DOS_FCB fcb(seg,offset);
RealPt old_dta=dos.dta();dos.dta(dos.tables.tempdta);
char name[DOS_FCBNAME];fcb.GetName(name);
Bit8u attr = DOS_ATTR_ARCHIVE;
fcb.GetAttr(attr); /* Gets search attributes if extended */
bool ret=DOS_FindFirst(name,attr,true);
dos.dta(old_dta);
if (ret) SaveFindResult(fcb);
return ret;
}
bool DOS_FCBFindNext(Bit16u seg,Bit16u offset) {
DOS_FCB fcb(seg,offset);
RealPt old_dta=dos.dta();dos.dta(dos.tables.tempdta);
bool ret=DOS_FindNext();
dos.dta(old_dta);
if (ret) SaveFindResult(fcb);
return ret;
}
Bit8u DOS_FCBRead(Bit16u seg,Bit16u offset,Bit16u recno) {
DOS_FCB fcb(seg,offset);
Bit8u fhandle,cur_rec;Bit16u cur_block,rec_size;
fcb.GetSeqData(fhandle,rec_size);
fcb.GetRecord(cur_block,cur_rec);
Bit32u pos=((cur_block*128)+cur_rec)*rec_size;
if (!DOS_SeekFile(fhandle,&pos,DOS_SEEK_SET)) return FCB_READ_NODATA;
Bit16u toread=rec_size;
if (!DOS_ReadFile(fhandle,dos_copybuf,&toread)) return FCB_READ_NODATA;
if (toread==0) return FCB_READ_NODATA;
if (toread < rec_size) { //Zero pad copybuffer to rec_size
Bitu i = toread;
while(i < rec_size) dos_copybuf[i++] = 0;
}
MEM_BlockWrite(Real2Phys(dos.dta())+recno*rec_size,dos_copybuf,rec_size);
if (++cur_rec>127) { cur_block++;cur_rec=0; }
fcb.SetRecord(cur_block,cur_rec);
if (toread==rec_size) return FCB_SUCCESS;
if (toread==0) return FCB_READ_NODATA;
return FCB_READ_PARTIAL;
}
Bit8u DOS_FCBWrite(Bit16u seg,Bit16u offset,Bit16u recno) {
DOS_FCB fcb(seg,offset);
Bit8u fhandle,cur_rec;Bit16u cur_block,rec_size;
fcb.GetSeqData(fhandle,rec_size);
fcb.GetRecord(cur_block,cur_rec);
Bit32u pos=((cur_block*128)+cur_rec)*rec_size;
if (!DOS_SeekFile(fhandle,&pos,DOS_SEEK_SET)) return FCB_ERR_WRITE;
MEM_BlockRead(Real2Phys(dos.dta())+recno*rec_size,dos_copybuf,rec_size);
Bit16u towrite=rec_size;
if (!DOS_WriteFile(fhandle,dos_copybuf,&towrite)) return FCB_ERR_WRITE;
Bit32u size;Bit16u date,time;
fcb.GetSizeDateTime(size,date,time);
if (pos+towrite>size) size=pos+towrite;
//time doesn't keep track of endofday
date = DOS_PackDate(dos.date.year,dos.date.month,dos.date.day);
Bit32u ticks = mem_readd(BIOS_TIMER);
Bit32u seconds = (ticks*10)/182;
Bit16u hour = (Bit16u)(seconds/3600);
Bit16u min = (Bit16u)((seconds % 3600)/60);
Bit16u sec = (Bit16u)(seconds % 60);
time = DOS_PackTime(hour,min,sec);
Bit8u temp=RealHandle(fhandle);
Files[temp]->time=time;
Files[temp]->date=date;
fcb.SetSizeDateTime(size,date,time);
if (++cur_rec>127) { cur_block++;cur_rec=0; }
fcb.SetRecord(cur_block,cur_rec);
return FCB_SUCCESS;
}
Bit8u DOS_FCBIncreaseSize(Bit16u seg,Bit16u offset) {
DOS_FCB fcb(seg,offset);
Bit8u fhandle,cur_rec;Bit16u cur_block,rec_size;
fcb.GetSeqData(fhandle,rec_size);
fcb.GetRecord(cur_block,cur_rec);
Bit32u pos=((cur_block*128)+cur_rec)*rec_size;
if (!DOS_SeekFile(fhandle,&pos,DOS_SEEK_SET)) return FCB_ERR_WRITE;
Bit16u towrite=0;
if (!DOS_WriteFile(fhandle,dos_copybuf,&towrite)) return FCB_ERR_WRITE;
Bit32u size;Bit16u date,time;
fcb.GetSizeDateTime(size,date,time);
if (pos+towrite>size) size=pos+towrite;
//time doesn't keep track of endofday
date = DOS_PackDate(dos.date.year,dos.date.month,dos.date.day);
Bit32u ticks = mem_readd(BIOS_TIMER);
Bit32u seconds = (ticks*10)/182;
Bit16u hour = (Bit16u)(seconds/3600);
Bit16u min = (Bit16u)((seconds % 3600)/60);
Bit16u sec = (Bit16u)(seconds % 60);
time = DOS_PackTime(hour,min,sec);
Bit8u temp=RealHandle(fhandle);
Files[temp]->time=time;
Files[temp]->date=date;
fcb.SetSizeDateTime(size,date,time);
fcb.SetRecord(cur_block,cur_rec);
return FCB_SUCCESS;
}
Bit8u DOS_FCBRandomRead(Bit16u seg,Bit16u offset,Bit16u numRec,bool restore) {
/* if restore is true :random read else random blok read.
* random read updates old block and old record to reflect the random data
* before the read!!!!!!!!! and the random data is not updated! (user must do this)
* Random block read updates these fields to reflect the state after the read!
*/
/* BUG: numRec should return the amount of records read!
* Not implemented yet as I'm unsure how to count on error states (partial/failed)
*/
DOS_FCB fcb(seg,offset);
Bit32u random;
Bit16u old_block=0;
Bit8u old_rec=0;
Bit8u error=0;
/* Set the correct record from the random data */
fcb.GetRandom(random);
fcb.SetRecord((Bit16u)(random / 128),(Bit8u)(random & 127));
if (restore) fcb.GetRecord(old_block,old_rec);//store this for after the read.
// Read records
for (int i=0; i<numRec; i++) {
error = DOS_FCBRead(seg,offset,(Bit16u)i);
if (error!=0x00) break;
}
Bit16u new_block;Bit8u new_rec;
fcb.GetRecord(new_block,new_rec);
if (restore) fcb.SetRecord(old_block,old_rec);
/* Update the random record pointer with new position only when restore is false*/
if(!restore) fcb.SetRandom(new_block*128+new_rec);
return error;
}
Bit8u DOS_FCBRandomWrite(Bit16u seg,Bit16u offset,Bit16u numRec,bool restore) {
/* see FCB_RandomRead */
DOS_FCB fcb(seg,offset);
Bit32u random;
Bit16u old_block=0;
Bit8u old_rec=0;
Bit8u error=0;
/* Set the correct record from the random data */
fcb.GetRandom(random);
fcb.SetRecord((Bit16u)(random / 128),(Bit8u)(random & 127));
if (restore) fcb.GetRecord(old_block,old_rec);
if (numRec>0) {
/* Write records */
for (int i=0; i<numRec; i++) {
error = DOS_FCBWrite(seg,offset,(Bit16u)i);// dos_fcbwrite return 0 false when true...
if (error!=0x00) break;
}
} else {
DOS_FCBIncreaseSize(seg,offset);
}
Bit16u new_block;Bit8u new_rec;
fcb.GetRecord(new_block,new_rec);
if (restore) fcb.SetRecord(old_block,old_rec);
/* Update the random record pointer with new position only when restore is false */
if(!restore) fcb.SetRandom(new_block*128+new_rec);
return error;
}
bool DOS_FCBGetFileSize(Bit16u seg,Bit16u offset) {
char shortname[DOS_PATHLENGTH];Bit16u entry;Bit8u handle;Bit16u rec_size;
DOS_FCB fcb(seg,offset);
fcb.GetName(shortname);
if (!DOS_OpenFile(shortname,OPEN_READ,&entry)) return false;
handle = RealHandle(entry);
Bit32u size = 0;
Files[handle]->Seek(&size,DOS_SEEK_END);
DOS_CloseFile(entry);fcb.GetSeqData(handle,rec_size);
Bit32u random=(size/rec_size);
if (size % rec_size) random++;
fcb.SetRandom(random);
return true;
}
bool DOS_FCBDeleteFile(Bit16u seg,Bit16u offset){
/* FCB DELETE honours wildcards. it will return true if one or more
* files get deleted.
* To get this: the dta is set to temporary dta in which found files are
* stored. This can not be the tempdta as that one is used by fcbfindfirst
*/
RealPt old_dta=dos.dta();dos.dta(dos.tables.tempdta_fcbdelete);
DOS_FCB fcb(RealSeg(dos.dta()),RealOff(dos.dta()));
bool nextfile = false;
bool return_value = false;
nextfile = DOS_FCBFindFirst(seg,offset);
while(nextfile) {
char shortname[DOS_FCBNAME] = { 0 };
fcb.GetName(shortname);
bool res=DOS_UnlinkFile(shortname);
if(!return_value && res) return_value = true; //at least one file deleted
nextfile = DOS_FCBFindNext(seg,offset);
}
dos.dta(old_dta); /*Restore dta */
return return_value;
}
bool DOS_FCBRenameFile(Bit16u seg, Bit16u offset){
DOS_FCB fcbold(seg,offset);
DOS_FCB fcbnew(seg,offset+16);
char oldname[DOS_FCBNAME];
char newname[DOS_FCBNAME];
fcbold.GetName(oldname);fcbnew.GetName(newname);
return DOS_Rename(oldname,newname);
}
void DOS_FCBSetRandomRecord(Bit16u seg, Bit16u offset) {
DOS_FCB fcb(seg,offset);
Bit16u block;Bit8u rec;
fcb.GetRecord(block,rec);
fcb.SetRandom(block*128+rec);
}
bool DOS_FileExists(char const * const name) {
char fullname[DOS_PATHLENGTH];Bit8u drive;
if (!DOS_MakeName(name,fullname,&drive)) return false;
return Drives[drive]->FileExists(fullname);
}
bool DOS_GetAllocationInfo(Bit8u drive,Bit16u * _bytes_sector,Bit8u * _sectors_cluster,Bit16u * _total_clusters) {
if (!drive) drive = DOS_GetDefaultDrive();
else drive--;
if (drive >= DOS_DRIVES || !Drives[drive]) return false;
Bit16u _free_clusters;
Drives[drive]->AllocationInfo(_bytes_sector,_sectors_cluster,_total_clusters,&_free_clusters);
SegSet16(ds,RealSeg(dos.tables.mediaid));
reg_bx=RealOff(dos.tables.mediaid+drive*2);
return true;
}
bool DOS_SetDrive(Bit8u drive) {
if (Drives[drive]) {
DOS_SetDefaultDrive(drive);
return true;
} else {
return false;
}
}
bool DOS_GetFileDate(Bit16u entry, Bit16u* otime, Bit16u* odate) {
Bit32u handle=RealHandle(entry);
if (handle>=DOS_FILES) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle] || !Files[handle]->IsOpen()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
};
if (!Files[handle]->UpdateDateTimeFromHost()) {
DOS_SetError(DOSERR_INVALID_HANDLE);
return false;
}
*otime = Files[handle]->time;
*odate = Files[handle]->date;
return true;
}
void DOS_SetupFiles (void) {
/* Setup the File Handles */
Bit32u i;
for (i=0;i<DOS_FILES;i++) {
Files[i]=0;
}
/* Setup the Virtual Disk System */
for (i=0;i<DOS_DRIVES;i++) {
Drives[i]=0;
}
Drives[25]=new Virtual_Drive();
}
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