dviselect
extract pages from DVI files
see also :
dviconcat - latex - tex
Synopsis
dviselect
[ -s ] [ -i infile ] [
-o outfile ] list of pages [
infile [ outfile ] ]
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description
Dviselect
selects pages from a DVI file produced by TeX, creating a
new DVI file usable by any of the TeX conversion programs,
or even by dviselect itself.
A range
is a string of the form even, odd, or
first:last where both first and last
are optional numeric strings, with negative numbers
indicated by a leading underscore character
’’_’’. If both first and
last are omitted, the colon may also be omitted, or
may be replaced with an asterisk
’’*’’. A page range is a list
of ranges separated by periods. A list of pages is
described by a set of page ranges separated by commas and/or
white space.
Dviselect
actually looks at the ten count variables that TeX
writes; the first of these (\count0) is the page number,
with \count1 through \count9 having varied uses depending on
which macro packages are in use. (Typically \count1 might be
a chapter or section number.) A page is included in
dviselect’s output if all its \count values
match any one of the ranges listed on the command line. For
example, the command ’’dviselect
*.1,35:’’ might select everything in chapter 1,
as well as pages 35 and up. ’’dviselect
10:30’’ would select pages 10 through 30
(inclusive). ’’:43’’ means
everything up to and including page 43 (including
negative-numbered pages). To get all even-numbered pages,
use ’’even’’; to get all
odd-numbered pages, use ’’odd’’. If
a Table of Contents has negative page numbers,
’’:_1’’ will select it. Note that
’’*’’ must be quoted from the shell;
the empty string is more convenient to use, if harder to
read.
Instead of
\count values, dviselect can also select by
’’absolute page number’’, where the
first page is page 1, the second page 2, and so forth.
Absolute page numbers are indicated by a leading equal sign
’’=’’. Ranges of absolute pages are
also allowed: ’’dviselect =3:7’’
will extract the third through seventh pages. Dot separators
are not legal in absolute ranges, and there are no negative
absolute page numbers. Even/odd specifiers, however, are
legal; ’’dviselect =even’’ selects
every other page, starting with the second.
More precisely,
an asterisk or an empty string implies no limit; an equal
sign means absolute page number rather than \counts; a
leading colon means everything up to and including the given
page; a trailing colon means everything from the given page
on; the word ’’even’’ means only
even values shall be accepted; the word
’’odd’’ means only odd values shall
be accepted; and a period indicates that the next \count
should be examined. If fewer than 10 ranges are specified,
the remaining \counts are left unrestricted (that is,
’’1:5’’ and
’’1:5.*’’ are equivalent). A single
number n is treated as if it were the range
n:n. An arbitrary number of page selectors may be
given, separated by commas or whitespace; a page is selected
if any of the selectors matches its \counts or absolute page
number.
Dviselect
normally prints the page numbers of the pages selected; the
-s option suppresses this.
bugs
A leading
’’-’’ ought to be allowed for
negative numbers, but it is currently used as a synonym for
’’:’’, for backwards
compatibility.
Section or
subsection selection will sometimes fail, for the DVI file
lists only the \count values that were active when the page
ended. Clever macro packages can alleviate this by making
use of other ’’free’’ \count
registers. Chapters normally begin on new pages, and do not
suffer from this particular problem.
The heuristic
that decides which arguments are page selectors and which
are file names is often wrong. Using shell redirection or
the -i and -o options is safest.
Dviselect
does not adjust the parameters in the postamble; however,
since these values are normally used only to size certain
structures in the output conversion programs, and the
parameters never need to be adjusted upward, this has not
proven to be a problem.
see also
dviconcat ,
latex , tex
MC-TeX User’s Guide
The TeXbook
author
Chris Torek,
University of Maryland