Short:        SAS/C++ Proto->FD->Pragmas convert v37.3
Uploader:     schneidr igt baum ethz ch
Type:         dev/c
Architecture: m68k-amigaos

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                      Proto2FD v37.3 (19.11.1995)
                     FD2Pragma v37.1 (20.11.1995)

                c1995 Quarz Development / A.H.Schneider

                             - Freeware -

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This  is  a  little tool I wrote when creating a shared library with C++
code  using  SAS/C++.  It  simly  does  what  its  name  tells:  convert
prototypes to function description entries (.FD) (used to create pragmas
for library calls).

Creating C code shared libraries with SAS/C++  6.56  is  a  pretty  easy
task.  This  is  not  the case for C++! Not only you have to provide all
your  class  declarations  AND  definitions  with  '__asm'  and   '__asm
__saveds'  keywords  as  well  as  a  register  info  for every function
arguments. This you could bear. But you also have to create an entry  in
the  function  description  file  (.FD)  for  EACH of the translated and
*name-mangled* C-function of your C++ classes!!!

That's where this tiny tool helps out. It just takes  a  prototype  file
generated  with  the  SAS/C  *GenProto*  option  (or any other prototype
extraction program, like f.e. protoman) as input  an  creates  fast  and
easy  for  every function with the keywords '__asm' the desired function
description entry into the output file.

The command syntax is:

        proto2fd <infile> [outfile]

        infile:  filename of the file containing the prototypes.

        outfile: filename of the output file (optional). If left out, an
                 appropriate filename with .fd extension will be created
                 from the infile name.


For example to create the FD file  from  'foo.cpp',  say  'foo.fd',  the
following  steps  are  necessary  (assuming  the  class  declaration and
definitions contain the '__asm' and '__saveds' keywords as described  in
the 'SAS/C Library Reference'):

        1. First create C translation of 'foo.cpp',
           > sc CxxOnly foo.cpp         ; this will create foo..c

        2. then create the prototypes file
           > sc GenProto foo..c GenProtoParm GenProtoFile=foo.protos 

        3. and finally create 'foo.fd'
           > proto2fd foo.protos foo.fd

Using smake you can easily automate the 3 steps by adding the  following
rules and depencies to your makefile:

foo.fd:         foo.cpp

.cpp.fd:
        sc cxxonly $?
        sc genproto $*..c genprotoparm genprotofile=$*.protos
        proto2fd $*.protos $@

There seems to be a problem with the SAS/C/C++ GenProto  option  as  the
length  of  the  function  names  may  not be more than 32 chars. Longer
function names will be truncated automatically to 32 chars and will  not
be  found  later  by the linker! Mangled C function names may easily get
longer than 32 chars.

If you like to use floating point registers (FPx) as parameters for your
library  function  calls,  there seems to be a problems with the SAS/C++
6.56 version of the FD2Pragma tool. (In  SAS/C++,  you  get  a  compiler
error,  if you try to use a Ax or Dx register for parameters of floating
point type, f.e. 'double'). A replacement for this tool is  provided  in
this  distribution  archive  (See  fd2pragma.doc, for more details about
this).


If you have any problems using this tool or suggestions, please  let  me
know.

Alex H. Schneider

schneidr@igt.baum.ethz.ch

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  If you know a faster way to do the above things, PLEASE let me know.
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Program History:

        v37.3 (19.11.1995):     . Added ability to use floating point 
                                  registers (FPx).
                                . Added a replacement for SAS/C++
                                  fd2proto tools for FPx use with FPx
                                  registers.

        v37.2 (12.11.1995):     . Fixed to work with other prototype 
                                  extractors: f.e: ProtoMan
                                . check for '__saveds' key word removed

        v37.1 (30.10.1995):     . First public release


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