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 );
}
static const char *GetHelpName( const char *exe_name )
{
/*
if executable is:
PE format, subsystem PE_SS_PL_DOSSTYLE (0x42) then PEDHELP.EXP
or:
PE format, other subsystems then PENHELP.EXP
otherwise:
PLSHELP.EXP
*/
tiny_ret_t rc;
tiny_handle_t handle;
unsigned_32 off;
union {
dos_exe_header dos;
pe_header pe;
} head;
handle = -1;
rc = TinyOpen( exe_name, 0 );
if( TINY_ERROR( rc ) )
goto exp;
handle = TINY_INFO( rc );
TinyRead( handle, &head.dos, sizeof( head.dos ) );
if( head.dos.signature != DOS_SIGNATURE )
goto exp;
TinySeek( handle, OS2_NE_OFFSET, SEEK_SET );
TinyRead( handle, &off, sizeof( off ) );
TinySeek( handle, off, SEEK_SET );
TinyRead( handle, &head.pe, sizeof( head.pe ) );
TinyClose( handle );
handle = -1;
switch( head.pe.signature ) {
case PE_SIGNATURE:
case PL_SIGNATURE:
if( head.pe.subsystem == PE_SS_PL_DOSSTYLE ) {
_DBG_Writeln( "Want PEDHELP" );
return( HELPNAME_DS );
}
_DBG_Writeln( "Want PENHELP" );
return( HELPNAME_NS );
}
exp:
if( handle != -1 )
TinyClose( handle );
_DBG_Writeln( "Want PLSHELP" );
return( HELPNAME );
}
static char *ReadInTrap( tiny_handle_t fh )
{
dos_exe_header hdr;
unsigned size;
unsigned hdr_size;
struct {
unsigned_16 off;
unsigned_16 seg;
} buff[ NUM_BUFF_RELOCS ], __far *p;
unsigned_16 start_seg;
unsigned_16 __far *fixup;
tiny_ret_t ret;
unsigned relocs;
hdr.signature = 0;
if( TINY_ERROR( TinyFarRead( fh, &hdr, sizeof( hdr ) ) ) ) {
return( TC_ERR_BAD_TRAP_FILE );
}
if( hdr.signature != DOS_SIGNATURE ) {
return( TC_ERR_BAD_TRAP_FILE );
}
hdr_size = hdr.hdr_size * 16;
size = (hdr.file_size * 0x200) - (-hdr.mod_size & 0x1ff) - hdr_size;
ret = TinyAllocBlock( (size + 15) >> 4 );
if( TINY_ERROR( ret ) ) {
return( TC_ERR_OUT_OF_DOS_MEMORY );
}
start_seg = TINY_INFO( ret );
TrapCode = MK_FP( start_seg, 0 );
TinySeek( fh, hdr_size, TIO_SEEK_SET );
TinyFarRead( fh, TrapCode, size );
TinySeek( fh, hdr.reloc_offset, TIO_SEEK_SET );
p = &buff[NUM_BUFF_RELOCS];
for( relocs = hdr.num_relocs; relocs != 0; --relocs ) {
if( p >= &buff[ NUM_BUFF_RELOCS ] ) {
if( TINY_ERROR( TinyFarRead( fh, buff, sizeof( buff ) ) ) ) {
return( TC_ERR_BAD_TRAP_FILE );
}
p = buff;
}
fixup = MK_FP( p->seg + start_seg, p->off );
*fixup += start_seg;
++p;
}
return( NULL );
}
unsigned long QFileSize( f_handle file )
/*********************************************/
{
unsigned long curpos;
unsigned long size;
curpos = QPos( file );
if( TINY_ERROR( TinyLSeek( file, 0L, TIO_SEEK_END, (void __near *)&size ) ) )
size = 0;
TinySeek( file, curpos, TIO_SEEK_START );
return( size );
}
_WCRTLINK int write( int handle, const void *buffer, unsigned len )
#endif
/**********************************************************************/
{
unsigned iomode_flags;
char *buf;
unsigned buf_size;
unsigned len_written, i, j;
#if defined(__NT__)
HANDLE h;
LONG cur_ptr_low;
LONG cur_ptr_high;
DWORD rc1;
#else
tiny_ret_t rc1;
#endif
int rc2;
__handle_check( handle, -1 );
iomode_flags = __GetIOMode( handle );
if( iomode_flags == 0 ) {
#if defined(__WINDOWS__) || defined(__WINDOWS_386__)
// How can we write to the handle if we never opened it? JBS
return( _lwrite( handle, buffer, len ) );
#else
__set_errno( EBADF );
return( -1 );
#endif
}
if( !(iomode_flags & _WRITE) ) {
__set_errno( EACCES ); /* changed from EBADF to EACCES 23-feb-89 */
return( -1 );
}
#if defined(__NT__)
h = __getOSHandle( handle );
#endif
// put a semaphore around our writes
_AccessFileH( handle );
if( (iomode_flags & _APPEND) && !(iomode_flags & _ISTTY) ) {
#if defined(__NT__)
if( GetFileType( h ) == FILE_TYPE_DISK ) {
cur_ptr_low = 0;
cur_ptr_high = 0;
rc1 = SetFilePointer( h, cur_ptr_low, &cur_ptr_high, FILE_END );
if( rc1 == INVALID_SET_FILE_POINTER ) { // this might be OK so
if( GetLastError() != NO_ERROR ) {
_ReleaseFileH( handle );
return( __set_errno_nt() );
}
}
}
#elif defined(__OS2__)
{
unsigned long dummy;
rc1 = DosChgFilePtr( handle, 0L, SEEK_END, &dummy );
// should we explicitly ignore ERROR_SEEK_ON_DEVICE here?
}
#else
rc1 = TinySeek( handle, 0L, SEEK_END );
#endif
#if !defined(__NT__)
if( TINY_ERROR( rc1 ) ) {
_ReleaseFileH( handle );
return( __set_errno_dos( TINY_INFO( rc1 ) ) );
}
#endif
}
len_written = 0;
rc2 = 0;
// Pad the file with zeros if necessary
if( iomode_flags & _FILEEXT ) {
// turn off file extended flag
__SetIOMode_nogrow( handle, iomode_flags&(~_FILEEXT) );
// It is not required to pad a file with zeroes on an NTFS file system;
// unfortunately it is required on FAT (and probably FAT32). (JBS)
rc2 = zero_pad( handle );
}
if( rc2 == 0 ) {
if( iomode_flags & _BINARY ) { /* if binary mode */
rc2 = os_write( handle, buffer, len, &len_written );
/* end of binary mode part */
} else { /* text mode */
i = stackavail();
if( i < 0x00b0 ) {
__STKOVERFLOW(); /* not enough stack space */
}
buf_size = 512;
if( i < (512 + 48) ) {
buf_size = 128;
}
#if defined(__AXP__) || defined(__PPC__)
buf = alloca( buf_size );
#else
buf = __alloca( buf_size );
#endif
j = 0;
for( i = 0; i < len; ) {
if( ((const char*)buffer)[i] == '\n' ) {
buf[j] = '\r';
++j;
if( j == buf_size ) {
rc2 = os_write( handle, buf, buf_size, &j );
if( rc2 == -1 )
break;
len_written += j;
if( rc2 == ENOSPC )
break;
len_written = i;
j = 0;
}
}
buf[j] = ((const char*)buffer)[i];
++i;
++j;
if( j == buf_size ) {
rc2 = os_write( handle, buf, buf_size, &j );
if( rc2 == -1 )
break;
len_written += j;
if( rc2 == ENOSPC )
break;
len_written = i;
j = 0;
}
}
if( j ) {
rc2 = os_write( handle, buf, j, &i );
if( rc2 == ENOSPC ) {
len_written += i;
} else {
len_written = len;
}
}
/* end of text mode part */
}
}
_ReleaseFileH( handle );
if( rc2 == -1 ) {
return( rc2 );
} else {
return( len_written );
}
}
static void AddModHandle( char *name, epsp_t *epsp )
/**************************************************/
{
mod_t *mod;
tiny_ret_t rc;
int handle;
object_record obj;
unsigned_32 off;
os2_flat_header os2_hdr;
addr_off new_base;
unsigned i;
if( ModHandles == NULL ) {
ModHandles = malloc( sizeof( mod_t ) );
} else {
ModHandles = realloc( ModHandles, ( NumModHandles + 1 ) * sizeof( mod_t ) );
}
mod = &ModHandles[NumModHandles];
++NumModHandles;
mod->epsp = epsp;
mod->loaded = TRUE;
mod->SegCount = 0;
mod->ObjInfo = NULL;
if( XVersion >= 0x404 ) {
name = epsp->FileName;
}
rc = TinyOpen( name, TIO_READ );
if( TINY_ERROR( rc ) ) {
return;
}
handle = TINY_INFO( rc );
TinySeek( handle, OS2_NE_OFFSET, SEEK_SET );
TinyRead( handle, &off, sizeof( off ) );
TinySeek( handle, off, SEEK_SET );
TinyRead( handle, &os2_hdr, sizeof( os2_hdr ) );
TinySeek( handle, os2_hdr.objtab_off + off, SEEK_SET );
mod->SegCount = os2_hdr.num_objects;
mod->ObjInfo = malloc( os2_hdr.num_objects * sizeof( seg_t ) );
new_base = 0;
for( i = 0; i < os2_hdr.num_objects; ++i ) {
TinyRead( handle, &obj, sizeof( obj ) );
mod->ObjInfo[i].flags = obj.flags;
mod->ObjInfo[i].base = obj.addr;
mod->ObjInfo[i].size = obj.size;
mod->ObjInfo[i].new_base = new_base;
new_base += ALIGN4K( obj.size );
if( NumModHandles == 1 ) { // main executable
if( obj.flags & OBJ_BIG ) {
if( obj.flags & OBJ_EXECUTABLE ) {
if( flatCode == FLAT_SEL ) {
flatCode = ( mod->epsp->SegBase + i * 8 ) | 3;
}
} else {
if( flatData == FLAT_SEL ) {
flatData = ( mod->epsp->SegBase + i * 8 ) | 3;
}
}
}
}
}
TinyClose( handle );
}
int __qwrite( int handle, const void *buffer, unsigned len )
{
int atomic;
#if defined(__NT__)
DWORD len_written;
HANDLE h;
int error;
#elif defined(__WARP__)
ULONG len_written;
#elif defined(__OS2_286__)
USHORT len_written;
#else
unsigned len_written;
#endif
#if !defined(__NT__)
tiny_ret_t rc;
#endif
__handle_check( handle, -1 );
#if defined(__NT__)
h = __getOSHandle( handle );
#endif
atomic = 0;
if( __GetIOMode( handle ) & _APPEND ) {
_AccessFileH( handle );
atomic = 1;
#if defined(__NT__)
if( SetFilePointer( h, 0, NULL, FILE_END ) == -1 ) {
error = GetLastError();
_ReleaseFileH( handle );
return( __set_errno_dos( error ) );
}
#elif defined(__OS2__)
{
unsigned long dummy;
rc = DosChgFilePtr( handle, 0L, SEEK_END, &dummy );
}
#else
rc = TinySeek( handle, 0L, SEEK_END );
#endif
#if !defined(__NT__)
if( TINY_ERROR( rc ) ) {
_ReleaseFileH( handle );
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
#endif
}
#ifdef DEFAULT_WINDOWING
if( _WindowsStdout != 0 ) {
LPWDATA res;
res = _WindowsIsWindowedHandle( handle );
if( res ) {
int rt;
rt = _WindowsStdout( res, buffer, len );
return( rt );
}
}
#endif
#if defined(__NT__)
if( !WriteFile( h, buffer, len, &len_written, NULL ) ) {
error = GetLastError();
if( atomic == 1 ) {
_ReleaseFileH( handle );
}
return( __set_errno_dos( error ) );
}
#elif defined(__OS2__)
rc = DosWrite( handle, (PVOID)buffer, len, &len_written );
#elif defined(__WINDOWS_386__)
rc = __TinyWrite( handle, buffer, len );
len_written = TINY_LINFO( rc );
#else
rc = TinyWrite( handle, buffer, len );
len_written = TINY_LINFO( rc );
#endif
#if !defined(__NT__)
if( TINY_ERROR( rc ) ) {
if( atomic == 1 ) {
_ReleaseFileH( handle );
}
return( __set_errno_dos( TINY_INFO( rc ) ) );
}
#endif
if( len_written != len ) {
__set_errno( ENOSPC );
}
if( atomic == 1 ) {
_ReleaseFileH( handle );
}
return( len_written );
}