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90 lines
4.0 KiB
Plaintext
90 lines
4.0 KiB
Plaintext
Tue Aug 20 16:19:51 CDT 1996
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Andy Fingerhut (jaf@arl.wustl.edu)
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In release 1.4, there are quite a few hand modifications to the C code
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that was automatically created from the Fortran code with f2c. They
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are all summarized in change log comments at the beginning of the
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changed files. All of the original files from f2c were checked in to
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RCS before modification, so it is possible to see exactly what changes
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were made, for the extremely curious. That precaution was also for my
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benefit, in case I ever recompile the Fortran sources, and want to
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make similar changes to that new C source code.
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Below is the README file for this directory included with the 1.3
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release of the LPC-10 package. A few parts of it are a little out of
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date, but it is correct for the most part.
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Sun Jul 7 15:30:31 CDT 1996
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Andy Fingerhut (jaf@arl.wustl.edu)
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To create the LPC-10 library, copy the appropriate makefile to the
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proper name for easy use, e.g., for Unix, copy makefile.unx to the
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file "Makefile". The file makefile.dos has been used with some
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version of the 'nmake' utility that comes with the Microsoft C
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compiler (the same one used for Nautilus v1.5a, which I believe
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specifies Microsoft C version 7.0 or later).
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Then edit the file lpc10.h in the directory above. It should already
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be set up to work properly on any Unix compiler for which "int" is 32
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bits and "short" is 16 bits, and under the Microsoft C compiler
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configured so that "long" is 32 bits and "int" is 16 bits. There must
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be a typedef for the two types INT32 and INT16 in that file. You
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should choose types that compile to those sizes using your compiler,
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because there are places in the LPC-10 code that expect INT16's to
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have exactly 16 bits (at least, I *think* they must be no larger), and
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INT32's to have exactly 32 bits.
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A few notes on how these files were created
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-------------------------------------------
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(This section is mostly for my benefit, so I can remember what I did.
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You don't need to read it if you just want to use this package. It
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might be useful to read it if you change the Fortran sources and want
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to recreate a usable library of C sources. -- Andy)
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These C sources were created automatically from the Fortran sources
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using f2c, for the most part. Listed below are the extra
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modifications that were made after this automatic conversion. Many of
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them were made so that it was not necessary to install f2c in order to
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use this LPC-10 coder.
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1.
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Put all of those files that were necessary for only the coder, rather
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than an application that uses the coder, into this subdirectory called
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lpc10.
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2.
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Copied f2c.h from the f2c distribution into this subdirectory. Some
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modifications were made to the "typedef" statements in this file, to
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explicitly indicate the sizes (in bits) that different integer types
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should be. The types INT32 and INT16 must be defined in a file called
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lpc10.h in the directory above. Created the file f2clib.c, containing
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only the functions pow_ii(), r_sign(), and i_nint() from the f2c
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library.
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3.
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The f2c output originally had a file called contrl_com.c, that defined
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a small structure containing a few variables that were used in many
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different functions of the LPC10 code. Every file containing
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functions that used it defined it as "extern", while contrl_com.c
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actually allocated storage for the structure. Bill Dorsey, one of the
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lead developers of Nautilus, said that the Microsoft C compiler had
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problems either compiling this file, or linking it with all of the
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other compiled files, so he just eliminated that file and removed the
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"extern" keyword from the one of the files that declared it that way.
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The file chosen (arbitrarily) was analys.c.
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4.
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Copied the makefiles for Unix and Microsoft C from the Nautilus v1.5a
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distribution into the lpc10 directory. Modified them to take out
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references to Nautilus. These makefiles don't create an executable,
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but a library of compiled functions called liblpc10.a (Unix) or
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LPC10.LIB (DOS). This library can be used when linking an executable
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that calls the functions lpcini_(), lpcenc_(), and lpcdec_().
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