man/manlinks.sed

# $Id: manlinks.sed,v 1.13 2008/01/19 23:31:17 tom Exp $
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# Given a manpage (nroff) as input, writes a list of the names that are
# listed in the "NAME" section, i.e., the names that we would like to use
# as aliases for the manpage -T.Dickey
#
# eliminate formatting controls that get in the way
/^'\\"/d
/\.\\"/d
/^\.br/d
/^\.sp/d
/typedef/d
s/^\.IX//
s/\\f.//g
s/[:,]/ /g
#
# eliminate unnecessary whitespace, convert multiple blanks to single space
s/^[ 	][ 	]*//
s/[ 	][ 	]*$//
s/[ 	][ 	]*/ /g
#
# convert ".SH" into a more manageable form
s/\.SH[ 	][ 	]*/.SH_(/
#
# in ".SH NAME"
# change "\-" to "-", eliminate text after "-", and split the remaining lines
# at each space, making a list of names:
/^\.SH_(NAME/,/^\.SH_(SYNOPSIS/{
s/\\-.*/ -/
/ -/{
s/ -.*//
s/ /\
/g
}
/^-/{
d
}
s/ /\
/g
}
#
# in ".SH SYNOPSIS"
# remove any line that does not contain a '(', since we only want functions.
# then strip off return-type of each function.
# finally, remove the parameter list, which begins with a '('.
/^\.SH_(SYNOPSIS/,/^\.SH_(DESCRIPTION/{
/^[^(]*$/d
# reduce
#	.B "int add_wch( const cchar_t *\fIwch\fB );"
# to
#	add_wch( const cchar_t *\fIwch\fB );"
s/^\([^ (]* [^ (]* [*]*\)//g
s/^\([^ (]* [*]*\)//g
# trim blanks in case we have
#	void (*) (FORM *) field_init(const FORM *form);
s/) (/)(/g
# reduce stuff like
#	void (*)(FORM *) field_init(const FORM *form);
# to
#	field_init(const FORM *form);
s/^\(([^)]*)\)\(([^)]*)\)*[ ]*//g
# rename marker temporarily
s/\.SH_(/.SH_/
# kill lines with ");", and trim off beginning of argument list.
s/[()].*//
# rename marker back
s/\.SH_/.SH_(/
}
#
# delete ".SH DESCRIPTION" and following lines
/^\.SH_(DESCRIPTION/,${
d
}
#
# delete any remaining directives
/^\./d