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- /*
- * File......: ISSHARE.PRG
- * Author....: Glenn Scott (from Tom Leylan C source)
- * Date......: $Date: 15 Aug 1991 23:03:48 $
- * Revision..: $Revision: 1.3 $
- * Log file..: $Logfile: E:/nanfor/src/isshare.prv $
- *
- * This is an original work by tom leylan and is placed in the
- * public domain.
- *
- * Modification history:
- * ---------------------
- *
- * $Log: E:/nanfor/src/isshare.prv $
- *
- * Rev 1.3 15 Aug 1991 23:03:48 GLENN
- * Forest Belt proofread/edited/cleaned up doc
- *
- * Rev 1.2 14 Jun 1991 19:52:06 GLENN
- * Minor edit to file header
- *
- * Rev 1.1 12 Jun 1991 02:14:56 GLENN
- * Documentation adjustment and checking ft_int86() call for compatibility
- * with new return value.
- *
- * Rev 1.0 01 Apr 1991 01:01:34 GLENN
- * Nanforum Toolkit
- *
- */
-
-
- /* $DOC$
- * $FUNCNAME$
- * FT_ISSHARE()
- * $CATEGORY$
- * DOS/BIOS
- * $ONELINER$
- * Determine if DOS "Share" is installed
- * $SYNTAX$
- * FT_ISSHARE() -> nRetCode
- * $ARGUMENTS$
- * None
- * $RETURNS$
- * nRetcode will be set as follows on exit:
- *
- * 0 if SHARE not loaded but ok to load
- * 1 if SHARE not loaded and not ok to load
- * 255 if SHARE loaded
- * $DESCRIPTION$
- * Uses DOS interrupt 2Fh (MultiPlex interrupt), service 10h
- * to determine if DOS SHARE.COM is loaded.
- * $EXAMPLES$
- * IF FT_ISSHARE() != 255
- * Qout("SHARE must be loaded!")
- * ENDIF
- * $SEEALSO$
- * FT_INT86()
- * $END$
- */
-
- #include "FTINT86.CH"
-
- #ifdef FT_TEST
- function main()
- local nLoaded := ft_isshare()
-
- do case
- case nLoaded == 0
- Qout("Share not loaded, but ok to load")
- case nLoaded == 1
- Qout("Share not loaded, but NOT ok to load!")
- case nLoaded == 255
- Qout("Share is loaded!")
- endcase
-
- Qout("Retcode: " + str( nLoaded ) )
-
- return nil
- #endif
-
- FUNCTION ft_isshare()
- local aRegs[ INT86_MAX_REGS ] // Declare the register array
-
- aRegs[ AX ] := makehi(16) // share service
- aRegs[ CX ] := 0 // Specify file attribute
-
- FT_Int86( 47, aRegs) // multiplex interrupt
-
- RETURN lowbyte( aRegs[AX] )
-
-