Notes on the THINK C version of Flex 2.4.6 Scott Hofmann 23-JUL-94 Internet: scotth@visix.com The only changes needed to compile Flex 2.4.6 under Symantec C++ 6.0 was to #include in main.c and call ccommand() just before flexinit() in main(). The notes below are mostly of historical significance only; most of the workarounds below were to get around restrictions/problems in earlier versions of THINK C. The only section which still applies is Russell Finn's description of how to make Flex generate output of type 'KAHL'. Also, 4-byte ints must be used by any project which uses Flex output. If you want to recreate the project, you'll need to add the files alloca.c and xmalloc.c in this directory. Both files are copylefted; see the GNU General Public License for details. You will also need to recompile both the ANSI and unix libraries to use 4 byte ints, and if you want the files that flex creates to have 'KAHL' as the creator you'll need to apply Russell Finn's patch. Notes on the THINK C version of Flex 2.3.7 Jonas Barklund, 25-JAN-92 Internet: jonas@csd.uu.se I have merged the sources for Flex version 2.3.7 with the older version which was hacked for THINK C version 4. I have conditionalized the code so that I think it should work with both THINK C version 4 and 5 (for those of you who don't know: the THINK_C symbol is defined as 1 in version 4 and as 5 in version 5). I have put in some missing prototypes, so it compiles also with "require prototypes" on. Most of the notes below still apply, in particular that about the MakeRes program. Notes on the THINK C version of Flex Russell S. Finn, 19-FEB-90 Internet: rsfinn@athena.mit.edu, rsfinn@neutron.lcs.mit.edu CompuServe: 76377,1107 GEnie: RSFINN Flex appears to be covered by a copyright notice from the University of California, similar to the one covering Berkeley Unix; the Free Software Foundation is not part of the picture here. So here is a version created with THINK C 4.0, along with the source code; as with the Bison distribution, I am including *all* of the source code I received with the package. The current version (modification date January 25, 1990) has only the bare-bones interface provided by the THINK C library routine "ccommand", which allows the user to type a command line and to redirect the output. Perhaps someday I may try to implement a "real" user interface; perhaps not. The only modifications made to the source file are surrounded by "#ifdef THINK_C"..."#endif"; in theory, then, these sources could be recompiled on another system if necessary. These are the actual files modified: alloca.c, dfa.c, flexdef.h, main.c, misc.c, scan.c, sym.c. Most of these changes were minor, and many of them would have been unnecessary if the original Flex source code had been written for an ANSI-compliant C compiler. In addition, the file "macutils.c" is completely new; see the discussion of "MakeRes" below. THINK C users may find it convenient to have the output text files written by Flex be THINK C documents. To do this, create a copy of the "ANSI" project called "ANSI-KAHL", and a copy of the file "fopen.c" called "fopen-KAHL.c". In the copy, find the routine "setfiletype", and replace the lines: if (!(oflag & F_BINARY)) pb.ioFlFndrInfo.fdType = 'TEXT'; with the lines: if (!(oflag & F_BINARY)) { pb.ioFlFndrInfo.fdType = 'TEXT'; pb.ioFlFndrInfo.fdCreator = 'KAHL'; } Replace "fopen.c" with the new "fopen-KAHL.c", rebuild the new project "ANSI-KAHL", and use this project in the project file "Flex.¹" instead of the "ANSI" project. ** The "MakeRes" program The output files created by Flex contain large amounts of preinitialized static data; the file "scan.c" contained in the Flex.¹ project is one such file. However, the Macintosh architecture limits normal applications to 32K of global data. In many cases (including Flex), this limit can be surpassed by the static data generated by Flex. The solution I have implemented for the THINK C version of Flex is to extract the data tables from the Flex output file, and paste them into the file "MakeRes.c". Then, by recompiling and running the program in the "MakeRes.¹" project (it is not necessary to create an application), a resource file called "Flex.¹.rsrc" is created in the current directory. The Flex output file "scan.c" has been modified to load the static data from the resource fork of the Flex application. This is done by calling the "load_table" function, which is defined in the file "macutils.c". In the application for which I needed Flex, the data tables were small enough that I didn't need to do this. However, if your application requires you to do this, simply follow the model of "scan.c"; the MakeRes project and source code has been included for your use.