140 lines
7.8 KiB
Plaintext
140 lines
7.8 KiB
Plaintext
/*
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* File......: TEMPFILE.PRG
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* Author....: Glenn Scott
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* CIS ID....: 71620,1521
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*
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* This is an original work by Glenn Scott and is placed in the
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* public domain.
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*
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* Modification history:
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* ---------------------
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*
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* Rev 1.7 28 Sep 1992 23:48:48 GLENN
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* Deleted #define for FLAG_CARRY as Toolkit v2.1's ftint86.ch has it.
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*
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* Rev 1.6 03 Oct 1991 18:36:28 GLENN
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* Tim Wong from Nantucket pointed out that this DOS function actually
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* leaves a file handle in AX. In order to preserve the functionality,
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* I now fclose() that handle if the call is succsessful.
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*
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* Rev 1.5 15 Aug 1991 23:05:04 GLENN
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* Forest Belt proofread/edited/cleaned up doc
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*
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* Rev 1.4 17 Jul 1991 22:11:18 GLENN
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* Stripped off chr(0)s in the return value (aRegs[DS])
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*
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* Rev 1.3 03 Jul 1991 01:08:08 GLENN
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* Changed one line in FT_TEST driver ( cHide == "Y" )
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*
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* Rev 1.2 14 Jun 1991 19:53:10 GLENN
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* Minor edit to file header
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*
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* Rev 1.1 12 Jun 1991 02:45:40 GLENN
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* Documentation mods, and convert to new ft_int86() syntax, return value.
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*
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* Rev 1.0 01 Apr 1991 01:02:24 GLENN
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* Nanforum Toolkit
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*
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*/
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/* $DOC$
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* $FUNCNAME$
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* FT_TEMPFIL()
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* $CATEGORY$
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* DOS/BIOS
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* $ONELINER$
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* Create a file with a unique name
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* $SYNTAX$
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* FT_TEMPFIL( [ <cPath> ] [, <lHide> ] ) -> cFileSpec
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* $ARGUMENTS$
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* <cPath> is the directory where you want to create the temporary
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* file. If you omit this argument, the root of the current drive
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* is assumed ("\").
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*
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* If <lHide> is .T., then the file will be created with the hidden
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* attribute set. The default is .F.
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* $RETURNS$
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* <cFileSpec> should be your path, including the name of the newly
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* created unique file. Use this with FOPEN(), etc.
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*
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* If a DOS error occurred when trying to create the file, a
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* null string will be returned.
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*
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* $DESCRIPTION$
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* This function uses DOS Interrupt 21, service 5Ah (Create temporary
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* file) to create a unique filename in a directory you specify.
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* There will be no extension. After the file is created, you may
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* then fopen() it and do any i/o you need (see the test driver
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* in the source code).
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*
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* This function requires FT_INT86().
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* $EXAMPLES$
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* Create a unique file in the root of the current drive:
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*
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* myFile := FT_TEMPFIL()
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*
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* Create a unique file in the current directory and hide it:
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*
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* myFile := FT_TEMPFIL(".\", .t.)
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*
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* Create a unique file on another drive, but do not hide it:
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*
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* myFile := FT_TEMPFIL("e:\nanfor\src\")
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* $END$
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*/
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#include "FTINT86.CH"
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#define DOS 33
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#define TEMPNAME 90
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#ifdef FT_TEST
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FUNCTION MAIN( cPath, cHide )
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LOCAL cFile, nHandle
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cFile := FT_TEMPFIL( cPath, (cHide == "Y") )
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if !empty( cFile )
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QOut( cFile )
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nHandle := fopen( cFile, 1 )
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fwrite( nHandle, "This is a test!" )
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fclose( nHandle )
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else
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Qout( "An error occurred" )
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endif
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RETURN nil
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#endif
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FUNCTION FT_TEMPFIL( cPath, lHide )
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LOCAL cRet,aRegs[3]
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cPath := iif( valType(cPath) != "C", ;
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repl( chr(0),12) , ;
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cPath += repl( chr(0), 12 ) ;
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)
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lHide := iif( valType(lHide) != "L", .f., lHide )
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/*
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aRegs[AX] := MAKEHI( TEMPNAME )
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aRegs[CX] := iif( lHide, 2, 0 )
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aRegs[DS] := cPath
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aRegs[DX] := REG_DS
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FT_INT86( DOS, aRegs )
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*/
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aRegs:=_ft_tempfil(cPath,lHide)
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/* If carry flag is clear, then call succeeded and a file handle is
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* sitting in AX that needs to be closed.
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*/
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if !ft_isBitOn( aRegs[3], FLAG_CARRY )
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fclose( aRegs[1] )
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cRet := strtran( aRegs[2], chr(0) )
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else
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cRet := ""
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endif
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RETURN cRet
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