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CWEB(1)                                                                CWEB(1)

       ctangle, cweave - translate CWEB to C and/or TeX

       ctangle [ -bhp ] [ +s ] webfile[.w] [changefile[.ch]] [outputfile[.c]]
       cweave [ -befhpx ] [ +s ] webfile[.w] [changefile[.ch]] [outputfile[.tex]]

       The  ctangle  program  converts  a CWEB source document into a C program that may be compiled in the usual way.
       The output file includes #line specifications so that debugging can be done in terms of the CWEB source file.

       The cweave program converts the same CWEB file into a TeX file that may be formatted and printed in  the  usual
       way.   It  takes  appropriate care of typographic details like page layout and the use of indentation, italics,
       boldface, etc., and it supplies extensive cross-index information that it gathers automatically.

       CWEB allows you to prepare a single document containing all the information that is needed both  to  produce  a
       compilable  C program  and to produce a well-formatted document describing the program in as much detail as the
       writer may desire.  The user of CWEB ought to be familiar with TeX as well as C.

       The command line should have one, two, or three names on it.  The first is taken as the CWEB file  (and  .w  is
       added  if there is no extension).  If that file cannot be opened, the extension .web is tried instead.  (But .w
       is recommended, since .web usually implies Pascal.)  If there is a second name, it is a change file (and .ch is
       added if there is no extension).  The change file overrides parts of the WEB file, as described in the documen-
       tation.  If there is a third name, it overrides the default name of the output file, which  is  ordinarily  the
       same as the name of the input file (but on the current directory) with the extension .c or .tex.

       Options in the command line may be either turned off with - (if they are on by default) or turned on with + (if
       they are off by default).  In fact, the options are processed from left to right, so a sequence like -f +f cor-
       responds to +f (which is the default).

       The  -b option suppresses the banner line that normally appears on your terminal when ctangle or cweave begins.
       The -h option suppresses the happy message that normally appears if the  processing  was  successful.   The  -p
       option  suppresses  progress  reports (starred module numbers) as the processing takes place.  If you say -bhp,
       you get nothing but error messages.

       The +s option prints statistics about memory usage at the end of a run (assuming that the  programs  have  been
       compiled with the -DSTAT switch).

       There  are three other options applicable to cweave only: -f means do not force a newline after every statement
       in the formatted output.  -e inhibits the enclosure of C material formatted by  cweave  in  brackets  \PB{...}.
       Such  brackets  are normally inserted so that special hooks can be used by cweb-latex and similar programs.  -x
       means omit the index and table of contents.

       The location of the files mentioned below varies from system to system.  Use  the  kpsewhich  utility  to  find
       their locations.

              TeX macros used by cweave output.

              The user manual.

       Literate Programming
              by D. E. Knuth

       Weaving a Program
              by Wayne Sewell

       The CWEB System of Structured Documentation
              by Donald E. Knuth and Silvio Levy (hardcopy version of cwebman.tex and the source code listings)

       tex(1), cc(1)

       Don  Knuth  wrote  WEB for TeX and Pascal.  Silvio Levy designed and developed CWEB by adapting the WEB conven-
       tions to C and by recoding everything in CWEB.  Knuth began using CWEB  and  made  further  refinements.   Many
       other helpers are acknowledged in the CWEB manual.

Web2C 7.5.6                    19 December 2004                        CWEB(1)