exetype.txt

[随书类]Dos6.0源代码

SUMMARY  exeType

#include <tools.h>

exeType( filename ) 
char *filename;

DESCRIPTION
 *  exeType( filename ) -   Return the type of .EXE, based on a quick
 *			    examination of the header.	If it is a new .EXE
 *			    and the OS ( Windows, DOS 4.X, 286DOS ) cannot
 *			    be guessed accurately, just return "new exe".
 *
 *  The algorithm is:
 *
 *	if ( File is too short for old-style header )	==> NOT AN EXE
 *	if ( MZ signature not found )			==> NOT AN EXE
 *	if ( Offset of relocation table != 0x40 )	==> Old-style .EXE
 *	if ( File is too short for new-style header )	==> NOT AN EXE
 *	if ( New Magic number is wrong )		==> Old-stype .EXE
 *	if ( Dynalink flag set )			==> Dyna-link lib
 *	if ( minalloc in old header is 0xFFFF ) 	==> 286DOS .EXE
 *	if ( Import table is empty )			==> DOS 4 .EXE
 *	if ( Resource Table is not empty )		==> Windows .EXE
 *	if ( Stub loader is present )
 *	   if ( "This" is at 0x4E )			==> 286DOS .EXE
	   else 					==> Bound .EXE
 *	else						==> New-style .EXE

RETURN VALUE

IMPLEMENTATION

Pull in the #defined values from tools.h

SEE ALSO   

NOTE

EXAMPLE