1Notes on the THINK C version of Flex 2.4.6 2Scott Hofmann 23-JUL-94 3Internet: scotth@visix.com 4 5The only changes needed to compile Flex 2.4.6 under Symantec C++ 6.0 was 6to #include <console.h> in main.c and call ccommand() just before flexinit() 7in main(). The notes below are mostly of historical significance only; most 8of the workarounds below were to get around restrictions/problems in earlier 9versions of THINK C. The only section which still applies is Russell Finn's 10description of how to make Flex generate output of type 'KAHL'. Also, 4-byte 11ints must be used by any project which uses Flex output. 12 13If you want to recreate the project, you'll need to add the files 14alloca.c and xmalloc.c in this directory. Both files are copylefted; see 15the GNU General Public License for details. You will also need to recompile 16both the ANSI and unix libraries to use 4 byte ints, and if you want the 17files that flex creates to have 'KAHL' as the creator you'll need to apply 18Russell Finn's patch. 19 20Notes on the THINK C version of Flex 2.3.7 21Jonas Barklund, 25-JAN-92 22Internet: jonas@csd.uu.se 23 24I have merged the sources for Flex version 2.3.7 with the older version 25which was hacked for THINK C version 4. I have conditionalized the code 26so that I think it should work with both THINK C version 4 and 5 (for 27those of you who don't know: the THINK_C symbol is defined as 1 in version 284 and as 5 in version 5). I have put in some missing prototypes, so it 29compiles also with "require prototypes" on. 30 31Most of the notes below still apply, in particular that about the MakeRes 32program. 33 34 35Notes on the THINK C version of Flex 36Russell S. Finn, 19-FEB-90 37Internet: rsfinn@athena.mit.edu, rsfinn@neutron.lcs.mit.edu 38CompuServe: 76377,1107 39GEnie: RSFINN 40 41Flex appears to be covered by a copyright notice from the University of 42California, similar to the one covering Berkeley Unix; the Free Software 43Foundation is not part of the picture here. So here is a version 44created with THINK C 4.0, along with the source code; as with the 45Bison distribution, I am including *all* of the source code I received 46with the package. 47 48The current version (modification date January 25, 1990) has only the 49bare-bones interface provided by the THINK C library routine "ccommand", 50which allows the user to type a command line and to redirect the output. 51Perhaps someday I may try to implement a "real" user interface; perhaps 52not. 53 54The only modifications made to the source file are surrounded by "#ifdef 55THINK_C"..."#endif"; in theory, then, these sources could be recompiled 56on another system if necessary. These are the actual files modified: 57alloca.c, dfa.c, flexdef.h, main.c, misc.c, scan.c, sym.c. Most of these 58changes were minor, and many of them would have been unnecessary if the 59original Flex source code had been written for an ANSI-compliant C compiler. 60In addition, the file "macutils.c" is completely new; see the discussion 61of "MakeRes" below. 62 63THINK C users may find it convenient to have the output text files written 64by Flex be THINK C documents. To do this, create a copy of the "ANSI" 65project called "ANSI-KAHL", and a copy of the file "fopen.c" called 66"fopen-KAHL.c". In the copy, find the routine "setfiletype", and replace 67the lines: 68 if (!(oflag & F_BINARY)) 69 pb.ioFlFndrInfo.fdType = 'TEXT'; 70with the lines: 71 if (!(oflag & F_BINARY)) { 72 pb.ioFlFndrInfo.fdType = 'TEXT'; 73 pb.ioFlFndrInfo.fdCreator = 'KAHL'; 74 } 75Replace "fopen.c" with the new "fopen-KAHL.c", rebuild the new project 76"ANSI-KAHL", and use this project in the project file "Flex.¹" 77instead of the "ANSI" project. 78 79** The "MakeRes" program 80 81The output files created by Flex contain large amounts of preinitialized 82static data; the file "scan.c" contained in the Flex.¹ project is one 83such file. However, the Macintosh architecture limits normal applications 84to 32K of global data. In many cases (including Flex), this limit can 85be surpassed by the static data generated by Flex. 86 87The solution I have implemented for the THINK C version of Flex is to 88extract the data tables from the Flex output file, and paste them into 89the file "MakeRes.c". Then, by recompiling and running the program in 90the "MakeRes.¹" project (it is not necessary to create an application), 91a resource file called "Flex.¹.rsrc" is created in the current directory. 92The Flex output file "scan.c" has been modified to load the static data 93from the resource fork of the Flex application. This is done by calling 94the "load_table" function, which is defined in the file "macutils.c". 95 96In the application for which I needed Flex, the data tables were small 97enough that I didn't need to do this. However, if your application 98requires you to do this, simply follow the model of "scan.c"; the MakeRes 99project and source code has been included for your use. 100 101