static char *ReadInTrap( tiny_handle_t fh )
{
dos_exe_header hdr;
memptr relocbuff[NUM_BUFF_RELOCS];
unsigned relocnb;
unsigned imagesize;
unsigned hdrsize;
rm_call_struct read;
unsigned offset;
if( TINY_ERROR( TinyRead( fh, &hdr, sizeof( hdr ) ) ) ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
if( hdr.signature != DOS_SIGNATURE ) {
return( TC_ERR_BAD_TRAP_FILE );
}
hdrsize = hdr.hdr_size * 16;
imagesize = ( hdr.file_size * 0x200 ) - (-hdr.mod_size & 0x1ff) - hdrsize;
TrapMem.dpmi_adr = DPMIAllocateDOSMemoryBlock( _NBPARAS( imagesize ) + hdr.min_16 );
if( TrapMem.segm.pm == 0 ) {
return( TC_ERR_OUT_OF_DOS_MEMORY );
}
TinySeek( fh, hdrsize, TIO_SEEK_SET );
memset( &read, 0, sizeof( read ) );
for( offset = 0; offset < imagesize; offset += (unsigned_16)read.eax ) {
read.ss = RMData.segm.rm;
read.sp = offsetof( rm_data, stack ) + STACK_SIZE;
read.edx = offset;
read.ebx = fh;
read.ds = TrapMem.segm.rm;
read.ecx = imagesize - offset;
read.eax = 0x3f00;
#if 1
relocnb = DPMISimulateRealModeInterrupt( 0x21, 0, 0, &read );
if( (read.flags & 1) || (unsigned_16)read.eax == 0 ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
#else
read.eax = TinyRead( fh, (void *)((TrapMem.segm.rm << 4) + offset), imagesize - offset );
if( (signed_32)read.eax < 0 ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
#endif
}
TinySeek( fh, hdr.reloc_offset, TIO_SEEK_SET );
for( relocnb = NUM_BUFF_RELOCS; hdr.num_relocs > 0; --hdr.num_relocs, ++relocnb ) {
if( relocnb >= NUM_BUFF_RELOCS ) {
if( TINY_ERROR( TinyRead( fh, relocbuff, sizeof( memptr ) * NUM_BUFF_RELOCS ) ) ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
relocnb = 0;
}
*(addr_seg __far *)MK_PM( TrapMem.segm.rm + relocbuff[relocnb].s.segment, relocbuff[relocnb].s.offset )
+= TrapMem.segm.rm;
}
return( NULL );
}
char *LoadTrap( char *trapbuff, char *buff, trap_version *trap_ver )
{
char *err;
char *parm;
char *end;
dig_fhandle dh;
trap_file_header __far *head;
if( trapbuff == NULL ) {
trapbuff = DEFAULT_TRP_NAME;
}
end = strchr( trapbuff, PARM_SEPARATOR );
if( end == NULL ) {
end = &trapbuff[strlen( trapbuff )];
parm = end;
} else {
parm = end + 1;
}
dh = DIGPathOpen( trapbuff, end - trapbuff, DEFAULT_TRP_EXT, NULL, 0 );
if( dh == DIG_NIL_HANDLE ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, trapbuff );
return( buff );
}
err = ReadInTrap( DIGGetSystemHandle( dh ) );
DIGPathClose( dh );
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, trapbuff );
if( err == NULL ) {
if( (err = SetTrapHandler()) != NULL || (err = CopyEnv()) != NULL ) {
strcpy( buff, err );
} else {
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
head = MK_PM( TrapMem.segm.rm, 0 );
if( head->sig == TRAP_SIGNATURE ) {
PMData->initfunc.s.offset = head->init;
PMData->reqfunc.s.offset = head->req;
PMData->finifunc.s.offset = head->fini;
PMData->initfunc.s.segment = TrapMem.segm.rm;
PMData->reqfunc.s.segment = TrapMem.segm.rm;
PMData->finifunc.s.segment = TrapMem.segm.rm;
if( CallTrapInit( parm, buff, trap_ver ) ) {
if( TrapVersionOK( *trap_ver ) ) {
TrapVer = *trap_ver;
ReqFunc = DoTrapAccess;
return( NULL );
}
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
}
}
}
}
KillTrap();
return( buff );
}
static char *ReadInTrap( dig_ldhandle ldfh )
{
dos_exe_header hdr;
memptr relocbuff[NUM_BUFF_RELOCS];
unsigned relocnb;
unsigned imagesize;
unsigned hdrsize;
rm_call_struct rm_dos_read;
unsigned offset;
if( DIGLoader( Read )( ldfh, &hdr, sizeof( hdr ) ) ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
if( hdr.signature != DOS_SIGNATURE ) {
return( TC_ERR_BAD_TRAP_FILE );
}
hdrsize = hdr.hdr_size * 16;
imagesize = ( hdr.file_size * 0x200 ) - (-hdr.mod_size & 0x1ff) - hdrsize;
TrapMem.dpmi_adr = DPMIAllocateDOSMemoryBlock( _NBPARAS( imagesize ) + hdr.min_16 );
if( TrapMem.segm.pm == 0 ) {
return( TC_ERR_OUT_OF_DOS_MEMORY );
}
DIGLoader( Seek )( ldfh, hdrsize, DIG_ORG );
// DPMI file read to real mode memory
memset( &rm_dos_read, 0, sizeof( rm_dos_read ) );
for( offset = 0; offset < imagesize; offset += (unsigned_16)rm_dos_read.eax ) {
rm_dos_read.ss = RMData.segm.rm;
rm_dos_read.sp = offsetof( rm_data, stack ) + STACK_SIZE;
rm_dos_read.edx = offset;
rm_dos_read.ebx = ldfh;
rm_dos_read.ds = TrapMem.segm.rm;
rm_dos_read.ecx = imagesize - offset;
rm_dos_read.eax = 0x3f00;
relocnb = DPMISimulateRealModeInterrupt( 0x21, 0, 0, &rm_dos_read );
if( (rm_dos_read.flags & 1) || (unsigned_16)rm_dos_read.eax == 0 ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
}
DIGLoader( Seek )( ldfh, hdr.reloc_offset, DIG_ORG );
for( relocnb = NUM_BUFF_RELOCS; hdr.num_relocs > 0; --hdr.num_relocs, ++relocnb ) {
if( relocnb >= NUM_BUFF_RELOCS ) {
if( DIGLoader( Read )( ldfh, relocbuff, sizeof( memptr ) * NUM_BUFF_RELOCS ) ) {
return( TC_ERR_CANT_LOAD_TRAP );
}
relocnb = 0;
}
*(addr_seg __far *)MK_PM( TrapMem.segm.rm + relocbuff[relocnb].s.segment, relocbuff[relocnb].s.offset ) += TrapMem.segm.rm;
}
return( NULL );
}
char *LoadTrap( const char *parms, char *buff, trap_version *trap_ver )
{
char *err;
const char *end;
dig_fhandle dh;
trap_file_header __far *head;
if( parms == NULL || *parms == '\0' ) {
parms = DEFAULT_TRP_NAME;
}
for( end = parms; *end != '\0' && *end != TRAP_PARM_SEPARATOR; ++end )
;
dh = DIGPathOpen( parms, end - parms, DEFAULT_TRP_EXT, NULL, 0 );
if( dh == DIG_NIL_HANDLE ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, parms );
return( buff );
}
err = ReadInTrap( DIGGetSystemHandle( dh ) );
DIGPathClose( dh );
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, parms );
if( err == NULL ) {
if( (err = SetTrapHandler()) != NULL || (err = CopyEnv()) != NULL ) {
strcpy( buff, err );
} else {
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
head = MK_PM( TrapMem.segm.rm, 0 );
if( head->sig == TRAP_SIGNATURE ) {
PMData->initfunc.s.offset = head->init;
PMData->reqfunc.s.offset = head->req;
PMData->finifunc.s.offset = head->fini;
PMData->initfunc.s.segment = TrapMem.segm.rm;
PMData->reqfunc.s.segment = TrapMem.segm.rm;
PMData->finifunc.s.segment = TrapMem.segm.rm;
parms = end;
if( *parms != '\0' )
++parms;
if( CallTrapInit( parms, buff, trap_ver ) ) {
if( TrapVersionOK( *trap_ver ) ) {
TrapVer = *trap_ver;
ReqFunc = DoTrapAccess;
return( NULL );
}
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
}
}
}
}
KillTrap();
return( buff );
}
static char *CopyEnv( void )
{
char __far *envarea;
uint_16 envsize;
#ifdef __OSI__
{
extern char *_EnvPtr;
envarea = _EnvPtr;
}
#else
envarea = MK_FP( *(addr_seg __far *)MK_FP( _psp, PSP_ENVSEG_OFF ), 0 );
#endif
envsize = EnvAreaSize( envarea );
PMData->envseg.dpmi_adr = DPMIAllocateDOSMemoryBlock( _NBPARAS( envsize ) );
if( PMData->envseg.segm.pm == 0 ) {
return( TC_ERR_OUT_OF_DOS_MEMORY );
}
_fmemcpy( MK_PM( PMData->envseg.segm.rm, 0 ), envarea, envsize );
return( NULL );
}
char *LoadTrap( const char *parms, char *buff, trap_version *trap_ver )
{
char *err;
const char *ptr;
dig_ldhandle ldfh;
trap_file_header __far *head;
#ifdef USE_FILENAME_VERSION
char filename[256];
char *p;
#endif
if( parms == NULL || *parms == '\0' ) {
parms = DEFAULT_TRP_NAME;
}
#ifdef USE_FILENAME_VERSION
for( ptr = parms, p = filename; *ptr != '\0' && *ptr != TRAP_PARM_SEPARATOR; ++ptr ) {
*p++ = *ptr;
}
*p++ = ( USE_FILENAME_VERSION / 10 ) + '0';
*p++ = ( USE_FILENAME_VERSION % 10 ) + '0';
*p = '\0';
ldfh = DIGLoader( Open )( filename, p - filename, DEFAULT_TRP_EXT, NULL, 0 );
#else
for( ptr = parms; *ptr != '\0' && *ptr != TRAP_PARM_SEPARATOR; ++ptr ) {
;
}
ldfh = DIGLoader( Open )( parms, ptr - parms, DEFAULT_TRP_EXT, NULL, 0 );
#endif
if( ldfh == DIGLD_NIL_HANDLE ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, parms );
return( buff );
}
err = ReadInTrap( ldfh );
DIGLoader( Close )( ldfh );
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, parms );
if( err == NULL ) {
if( (err = SetTrapHandler()) != NULL || (err = CopyEnv()) != NULL ) {
strcpy( buff, err );
} else {
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
head = MK_PM( TrapMem.segm.rm, 0 );
if( head->sig == TRAP_SIGNATURE ) {
PMData->initfunc.s.offset = head->init;
PMData->reqfunc.s.offset = head->req;
PMData->finifunc.s.offset = head->fini;
PMData->initfunc.s.segment = TrapMem.segm.rm;
PMData->reqfunc.s.segment = TrapMem.segm.rm;
PMData->finifunc.s.segment = TrapMem.segm.rm;
parms = ptr;
if( *parms != '\0' )
++parms;
if( CallTrapInit( parms, buff, trap_ver ) ) {
if( TrapVersionOK( *trap_ver ) ) {
TrapVer = *trap_ver;
ReqFunc = DoTrapAccess;
return( NULL );
}
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
}
}
}
}
KillTrap();
return( buff );
}
char *LoadTrap( char *trapbuff, char *buff, trap_version *trap_ver )
{
char *err;
char *parm;
char *end;
handle dh;
trap_file_header __far *head;
char init_error[256];
if( trapbuff == NULL ) {
trapbuff = DEFAULT_TRP_NAME;
}
end = strchr( trapbuff, PARM_SEPARATOR );
if( end == NULL ) {
end = &trapbuff[ strlen( trapbuff ) ];
parm = end;
} else {
parm = end + 1;
}
dh = PathOpen( trapbuff, end - trapbuff, DEFAULT_TRP_EXT );
if( dh == NIL_HANDLE ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, trapbuff );
return( buff );
}
err = ReadInTrap( GetSystemHandle( dh ) );
FileClose( dh );
if( err != NULL ) {
sprintf( buff, TC_ERR_CANT_LOAD_TRAP, trapbuff );
KillTrap();
return( buff );
}
err = SetTrapHandler();
if( err != NULL ) {
KillTrap();
return( err );
}
err = CopyEnv();
if( err != NULL ) {
KillTrap();
return( err );
}
head = MK_PM( TrapMem.s.rm, 0 );
if( head->sig != TRAP_SIGNATURE ) {
KillTrap();
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
return( buff );
}
PMData->initfunc.s.offset = head->init;
PMData->reqfunc.s.offset = head->req;
PMData->finifunc.s.offset = head->fini;
PMData->initfunc.s.segment = TrapMem.s.rm;
PMData->reqfunc.s.segment = TrapMem.s.rm;
PMData->finifunc.s.segment = TrapMem.s.rm;
if( !CallTrapInit( parm, init_error, trap_ver ) ) {
KillTrap();
strcpy( buff, init_error );
return( buff );
}
if( !TrapVersionOK( *trap_ver ) ) {
KillTrap();
strcpy( buff, TC_ERR_WRONG_TRAP_VERSION );
return( buff );
}
TrapVer = *trap_ver;
ReqFunc = DoTrapAccess;
return( NULL );
}
