1 Notes on the THINK C version of Flex 2.4.6
2 Scott Hofmann 23-JUL-94
3 Internet: scotth@visix.com
5 The only changes needed to compile Flex 2.4.6 under Symantec C++ 6.0 was
6 to #include <console.h> in main.c and call ccommand() just before flexinit()
7 in main(). The notes below are mostly of historical significance only; most
8 of the workarounds below were to get around restrictions/problems in earlier
9 versions of THINK C. The only section which still applies is Russell Finn's
10 description of how to make Flex generate output of type 'KAHL'. Also, 4-byte
11 ints must be used by any project which uses Flex output.
13 If you want to recreate the project, you'll need to add the files
14 alloca.c and xmalloc.c in this directory. Both files are copylefted; see
15 the GNU General Public License for details. You will also need to recompile
16 both the ANSI and unix libraries to use 4 byte ints, and if you want the
17 files that flex creates to have 'KAHL' as the creator you'll need to apply
20 Notes on the THINK C version of Flex 2.3.7
21 Jonas Barklund, 25-JAN-92
22 Internet: jonas@csd.uu.se
24 I have merged the sources for Flex version 2.3.7 with the older version
25 which was hacked for THINK C version 4. I have conditionalized the code
26 so that I think it should work with both THINK C version 4 and 5 (for
27 those of you who don't know: the THINK_C symbol is defined as 1 in version
28 4 and as 5 in version 5). I have put in some missing prototypes, so it
29 compiles also with "require prototypes" on.
31 Most of the notes below still apply, in particular that about the MakeRes
35 Notes on the THINK C version of Flex
36 Russell S. Finn, 19-FEB-90
37 Internet: rsfinn@athena.mit.edu, rsfinn@neutron.lcs.mit.edu
38 CompuServe: 76377,1107
41 Flex appears to be covered by a copyright notice from the University of
42 California, similar to the one covering Berkeley Unix; the Free Software
43 Foundation is not part of the picture here. So here is a version
44 created with THINK C 4.0, along with the source code; as with the
45 Bison distribution, I am including *all* of the source code I received
48 The current version (modification date January 25, 1990) has only the
49 bare-bones interface provided by the THINK C library routine "ccommand",
50 which allows the user to type a command line and to redirect the output.
51 Perhaps someday I may try to implement a "real" user interface; perhaps
54 The only modifications made to the source file are surrounded by "#ifdef
55 THINK_C"..."#endif"; in theory, then, these sources could be recompiled
56 on another system if necessary. These are the actual files modified:
57 alloca.c, dfa.c, flexdef.h, main.c, misc.c, scan.c, sym.c. Most of these
58 changes were minor, and many of them would have been unnecessary if the
59 original Flex source code had been written for an ANSI-compliant C compiler.
60 In addition, the file "macutils.c" is completely new; see the discussion
63 THINK C users may find it convenient to have the output text files written
64 by Flex be THINK C documents. To do this, create a copy of the "ANSI"
65 project 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
68 if (!(oflag & F_BINARY))
69 pb.ioFlFndrInfo.fdType = 'TEXT';
71 if (!(oflag & F_BINARY)) {
72 pb.ioFlFndrInfo.fdType = 'TEXT';
73 pb.ioFlFndrInfo.fdCreator = 'KAHL';
75 Replace "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"
77 instead of the "ANSI" project.
79 ** The "MakeRes" program
81 The output files created by Flex contain large amounts of preinitialized
82 static data; the file "scan.c" contained in the Flex.¹ project is one
83 such file. However, the Macintosh architecture limits normal applications
84 to 32K of global data. In many cases (including Flex), this limit can
85 be surpassed by the static data generated by Flex.
87 The solution I have implemented for the THINK C version of Flex is to
88 extract the data tables from the Flex output file, and paste them into
89 the file "MakeRes.c". Then, by recompiling and running the program in
90 the "MakeRes.¹" project (it is not necessary to create an application),
91 a resource file called "Flex.¹.rsrc" is created in the current directory.
92 The Flex output file "scan.c" has been modified to load the static data
93 from the resource fork of the Flex application. This is done by calling
94 the "load_table" function, which is defined in the file "macutils.c".
96 In the application for which I needed Flex, the data tables were small
97 enough that I didn't need to do this. However, if your application
98 requires you to do this, simply follow the model of "scan.c"; the MakeRes
99 project and source code has been included for your use.