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- CWEB(1L) CWEB(1L)
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- NAME
- ctangle, cweave - translate CWEB to C and/or TeX
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- SYNOPSIS
- ctangle [ -bhp ] [ +s ] webfile[.w] [changefile[.ch]]
- [outputfile[.c]]
- cweave [ -bfhipx ] [ +ags ] 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 out-
- put 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.
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- CWEB allows you to prepare a single document containing
- all the information that is needed both to produce a com-
- pilable 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.
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- 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 recom-
- mended, 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.
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- 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
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- CWEB(1L) CWEB(1L)
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- the processing takes place. If you say -bhp, you get noth-
- ing but error messages.
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- The +s option prints statistics about memory usage at the
- end of a run (assuming that the programs have been com-
- piled 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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- In addition to these options the Amiga version of cweave
- has two more options: +a causes Amiga-specific type
- identifiers to be recognized as keywords (e.g. UWORD). +g
- means that the German CWEB macros should be used instead
- of the English ones.
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- FILES
- cweb/cwebmac.tex TeX macros used by cweave output.
- amiga/cwebmacg.tex: German TeX macros for cweave output.
- cweb/cwebman.tex The user manual.
- cweb/examples/wc.w An introductory example.
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- SEE ALSO
- Literate Programming by D.E. Knuth.
- Weaving a Program by Wayne Sewell
- tex(1), cc(1)
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- AUTHORS
- 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.
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