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- CWEB(1L) Unix Programmer's Manual CWEB(1L)
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- NAME
- ctangle, cweave - translate CWEB to C and/or TeX
-
- SYNOPSIS
- ctangle [ -bhp ] [ +s ] webfile[.w] [changefile[.ch]] [outputfile[.c]]
- cweave [ -bfhpx ] [ +s ] webfile[.w] [changefile[.ch]] [outputfile[.tex]]
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-
- DESCRIPTION
- 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
- documentation. 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
- corresponds 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 two other options applicable to cweave only: -f means do not
- force a newline after every statement in the formatted output. -x means
- omit the index and table of contents.
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- 6/15/92 1
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- CWEB(1L) Unix Programmer's Manual CWEB(1L)
-
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- FILES
- /usr/local/lib/tex/inputs/cwebmac.tex TeX macros used by cweave output.
- /usr/local/src/cweb/cwebman.tex The user manual.
- /usr/local/src/cweb/examples/wc.w An introductory example.
- /usr/local/lib/cweb Directory for cweb "include" files.
-
- SEE ALSO
- Literate Programming by D.E. Knuth.
- Weaving a Program by Wayne Sewell
- tex(1), cc(1)
-
- AUTHORS
- Don Knuth wrote WEB for TeX and Pascal. Silvio Levy designed and
- developed CWEB by adapting the WEB conventions to C and by recoding
- everything in CWEB. Knuth began using CWEB and made further refinements.
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