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* Several improvements to escape sequence handling.Ingo Schwarze2018-12-1515-38/+218
| | | | | | | | | | | | | | | | | | | | | | | * Add the missing special character \_ (underscore). * Partial implementations of \a (leader character) and \E (uninterpreted escape character). * Parse and ignore \r (reverse line feed). * Add a WARNING message about undefined escape sequences. * Add an UNSUPP message about unsupported escape sequences. * Mark \! and \? (transparent throughput) and \O (suppress output) as unsupported. * Treat the various variants of zero-width spaces as one-byte escape sequences rather than as special characters, to avoid defining bogus forms with square brackets. * For special characters with one-byte names, do not define bogus forms with square brackets, except for \[-], which is valid. * In the form with square brackets, undefined special characters do not fall back to printing the name verbatim, not even for one-byte names. * Starting a special character name with a blank is an error. * Undefined escape sequences never abort formatting of the input string, not even in HTML output mode. * Document the newly handled escapes, and a few that were missing. * Regression tests for most of the above.
* Clean up the validation of .Pp, .PP, .sp, and .br. Make sure allIngo Schwarze2018-12-042-0/+3
| | | | | | | | | | | | | | combinations are handled, and are handled in a systematic manner. This resolves some erratic duplicate handling, handles a number of missing cases, and improves diagnostics in various respects. Move validation of .br and .sp to the roff validation module rather than doing that twice in the mdoc and man validation modules. Move the node relinking function to the roff library where it belongs. In validation functions, only look at the node itself, at previous nodes, and at descendants, not at following nodes or ancestors, such that only nodes are inspected which are already validated.
* When a conditional block is closed by putting "\}" on a text lineIngo Schwarze2018-11-263-4/+30
| | | | | | | | | | | | | by itself (which is somewhat unusual but not invalid; most authors use the empty macro line ".\}" instead), agree more closely with groff and do not produce a double space in the output. Quirk reported by millert@. While here, tweak the rest of the function body of roff_cond_text() to more closely match roff_cond_sub(). The subtly different handling could make people (including myself) wonder whether there is any point in being different. Testing shows there is not.
* Rudimentary implementation of the roff(7) .char (output glyphIngo Schwarze2018-08-257-2/+61
| | | | | | | | | definition) request, used for example by groff_hdtbl(7). This simplistic implementation may interact incorrectly with the .tr (input character translation) request. But come on, you are not only using .char *and* .tr, but you do so with respect to the same character in the same manual page?
* If man(7) next-line scope is open and the line ends with \c,Ingo Schwarze2018-08-252-3/+29
| | | | the scope remains open. Needed for example for groff_man(7).
* Rudimentary implementation of the roff(7) .while request.Ingo Schwarze2018-08-2416-2/+182
| | | | | | | | | | | Needed for example by groff_hdtbl(7). There are two limitations: It does not support nested .while requests yet, and each .while loop must start and end in the same scope. The roff_parseln() return codes are now more flexible and allow OR'ing options.
* Implement the roff(7) .shift and .return requests,Ingo Schwarze2018-08-2314-8/+184
| | | | | | | | | | | | | | for example used by groff_hdtbl(7) and groff_mom(7). Also correctly interpolate arguments during nested macro execution even after .shift and .return, implemented using a stack of argument arrays. Note that only read.c, but not roff.c can detect the end of a macro execution, and the existence of .shift implies that arguments cannot be interpolated up front, so unfortunately, this includes a partial revert of roff.c rev. 1.337, moving argument interpolation back into the function roff_res().
* Disable one test for now that is broken after the addition of \).Ingo Schwarze2018-08-192-4/+3
| | | | | | | | It is not broken because of \), which is correctly implemented, but the addition merely reveals a hidden bug elsewhere, almost certainly in \\ handling. Given that \\ is among the most mysterious escape sequences and using it is very strongly discouraged in manual pages, fixing that is not urgent - and may be hard.
* Implement the \*(.T predefined string (interpolate device name)Ingo Schwarze2018-08-166-1/+90
| | | | | by allowing the preprocessor to pass it through to the formatters. Used for example by the groff_char(7) manual page.
* Two new low-level roff(7) features:Ingo Schwarze2018-04-103-1/+50
| | | | | | * .nr optional third argument (auto-increment step size) * \n+ and \n- numerical register auto-increment and -decrement bentley@ reported on Dec 9, 2013 that lang/sbcl(1) uses these.
* When accessing an undefined number register, define it to be zero, likeIngo Schwarze2018-04-093-1/+46
| | | | | | the previous commit for strings and macros, only technically simpler. Desired behaviour also mentioned by Werner Lemberg in 2011. This diff adds functionality but is -21 +19 LOC. :-)
* Using an undefined string or macro will cause it to be defined as empty.Ingo Schwarze2018-04-094-2/+110
| | | | | Observed by Werner Lemberg on Nov 14, 2011 and rotting on my TODO list ever since.
* catch up with ASCII renderings in chars.c rev. 1.72Ingo Schwarze2017-08-232-10/+14
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* Now that we have the -Wstyle message level, downgrade six warningsIngo Schwarze2017-07-065-44/+44
| | | | | | that are not syntax mistakes and that do not cause wrong formatting or content to style suggestions. Also upgrade two warnings that may cause information loss to errors.
* Fix handling of \} on roff request lines.Ingo Schwarze2017-07-042-3/+12
| | | | Cures bogus error messages in pages generated with pod2man(1).
* Messages of the -Wbase level now print STYLE:. Since thisIngo Schwarze2017-07-04145-315/+341
| | | | | | | | causes horrible churn anyway, profit of the opportunity to stop excessive testing, such that this is hopefully the last instance of such churn. Consistently use OpenBSD RCS tags, blank .Os, blank fourth .TH argument, and Mdocdate like everywhere else. Use -Ios=OpenBSD for platform-independent predictable output.
* cope with changes in BASE messagesIngo Schwarze2017-06-257-9/+11
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* cope with changes in BASE messagesIngo Schwarze2017-06-2518-29/+40
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* Implement appending to standard man(7) and mdoc(7) macros with .am.Ingo Schwarze2017-06-1812-6/+100
| | | | | | | | | | | | | | | | | | With roff_getstrn(), provide finer control which definitions can be used for what: * All definitions can be used for .if d tests and .am appending. * User-defined for \* expansion, .dei expansion, and macro calling. * Predefined for \* expansion. * Standard macros, original or renamed, for macro calling. Several related improvements while here: * Do not return string table entries that have explicitly been removed. * Do not create a rentab entry when trying to rename a non-existent macro. * Clear an existing rentab entry when the external interface roff_setstr() is called with its name. * Avoid trailing blanks in macro lines generated from renamed and from aliased macros. * Delete the duplicate __m*_reserved[] tables, just use roff_name[].
* style message about missing RCS ids; inspired by mdoclintIngo Schwarze2017-06-1721-4/+21
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* style message about missing RCS ids; inspired by mdoclintIngo Schwarze2017-06-1711-4/+11
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* correct handling of blank lines after \cIngo Schwarze2017-06-174-0/+25
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* implement so-called absolute horizontal motion: \h'|...',Ingo Schwarze2017-06-143-1/+4
| | | | used for example by zoem(1)
* Naive implementation of the roff(7) .po (page offset) request.Ingo Schwarze2017-06-144-1/+43
| | | | | | This clearly works when .po is called on the top level, but might not be sophisticated enough if people call .po inside indentation-changing contexts, but i haven't seen that in manual pages (yet :).
* let \l use the right fill characterIngo Schwarze2017-06-144-2/+42
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* improve rounding rules for scaling unitsIngo Schwarze2017-06-146-3/+11
| | | | in horizontal orientation in the terminal formatter
* implement the roff(7) d (macro or string defined) conditionalIngo Schwarze2017-06-143-1/+50
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* implement the roff(7) \p (break output line) escape sequenceIngo Schwarze2017-06-143-1/+35
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* Style message about legacy man(7) date format in mdoc(7) documentsIngo Schwarze2017-06-1112-0/+12
| | | | | and operating system dependent messages about missing or unexpected Mdocdate; inspired by mdoclint(1).
* Minimal implementation of the \h (horizontal motion) escape sequence.Ingo Schwarze2017-06-011-2/+2
| | | | Good enough to cope with the average DocBook insanity.
* Basic implementation of the roff(7) .ti (temporary indent) request.Ingo Schwarze2017-05-086-1/+83
| | | | Needed by about four dozen ports (thanks to naddy@ for the research).
* Basic implementation of the roff(7) .ta (define tab stops) request.Ingo Schwarze2017-05-076-1/+106
| | | | | | This is the first feature made possible by the parser reorganization. Improves the formatting of the SYNOPSIS in many Xenocara GL manuals. Also important for ports, as reported by many, including naddy@.
* Move .sp to the roff modules. Enough infrastructure is in placeIngo Schwarze2017-05-051-0/+1
| | | | now that this actually saves code: -70 LOC.
* Move handling of the roff(7) .ft request from the man(7)Ingo Schwarze2017-05-054-2/+33
| | | | | modules to the new roff(7) modules. As a side effect, mdoc(7) now handles .ft, too. Of course, do not use that.
* Parser reorg:Ingo Schwarze2017-05-047-12/+12
| | | | | Generate the first node on the roff level: .br Fix some column numbers in diagnostic messages while here.
* Really commit some files that failed to get committed in this commit:Ingo Schwarze2017-03-091-0/+1
| | | | | | | Now that markdown output is tested for almost everything, test all input files in -T markdown output mode by default and only mark those files with SKIP_MARKDOWN that are not to be tested. Much easier to read, and almost minus 40 lines of Makefile code.
* prevent infinite recursion while expanding the argumentsIngo Schwarze2017-03-083-1/+8
| | | | of a user-defined macro; issue found by tb@ with afl(1)
* If a user-defined macro is aborted because it exceeds the stackIngo Schwarze2017-03-074-2/+31
| | | | | | | | | | | | | | | | | | | limit, usually due to infinite recursion, discard whatever remains in all those open stack levels. Otherwise, insane constructions like the following could generate macros of enormous size, causing mandoc(1) to die from memory exhaustion: .de m \" original macro definition .m \" recursion to blow up the stack .de m \" definition to be run during the call of .m marked (*) very long plain text (some kilobytes) .m \" expand the above a thousand times while unwinding the stack .. \" end of the original definition .m \" (*) recursively generate a ridiculously large macro .. \" end of recursively generated definition .m \" execute the giant macro, exhausting memory Very creative abuse found by tb@ with afl(1).
* Many people have been complaining for a long time that ``...'' looksIngo Schwarze2017-02-173-3/+3
| | | | | | | | | | | ugly in -Tascii output. For that reason, bentley@ submitted patches to render "..." instead to groff in November 2014 (yes, more than two years ago). Carsten Kunze yesterday merged them for the upcoming groff-1.22.4 release. Yay! Consequently, do the same in mandoc: Render \(Lq and \(Rq (which are used for .Do, .Dq, .Lb, and .St) as '"' in -Tascii output. All other output modes including -Tutf8 remain unchanged.
* Finally port the OpenBSD regression suite.Ingo Schwarze2017-02-08172-0/+3303
| | | | | Both kristaps@ and wiz@ repeated asked for this, literally for years.
* Move the regression suite to the attic.Ingo Schwarze2014-03-0329-532/+0
| | | | | | | It has not been used or maintained for several years, and we won't start using it now. Devlopment regression testing is done in OpenBSD, and there is no value in maintaining two regression suites in parallel.
* Fix adding some minimal intelligence to conditional parser. See roff.7Kristaps Dzonsons2010-06-101-0/+30
| | | | | | | | | | for what's supported. This simplified the roff_cond() function quite nicely. From a bug report by uqs@. Added regression test based on bug-report example by uqs@. Also added ROFF_DEBUG to see what the hell the parser is actually doing. Obviously turned off by default.
* Regression made old-groff-friendly.Kristaps Dzonsons2010-06-011-2/+0
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* Fixed condition of `\}' closing a conditional at the start of the line.Kristaps Dzonsons2010-06-011-0/+95
| | | | | | | | Fixed flushed-out condition of \} causing subsequent arguments to be truncated, when in fact the whole line should be passed through (if the conditional succeeds) to the front-end and the \} ignored there. Added regression test of this behaviour.
* Full support for ie/el. This completes the initial roff support.Kristaps Dzonsons2010-05-1723-16/+197
| | | | | Added test files for ie/el. Using `if 0' as a baseline for "false" roff instructions instead of `if t'.
* libroff now is aware of which sub-nodes should be interpreted even in aKristaps Dzonsons2010-05-172-0/+33
| | | | | | | | | | conditional-negative context so as to preserve structural integrity. Initial "rules" (deny/allow) are now inherited for future work in evaluating conditionals. Lint-fix noted by Joerg. Added regression tests for zany constructs.
* `ig' support in all its glory. TryKristaps Dzonsons2010-05-168-0/+97
| | | | | | | | | | | | | | | | | | .ig ig asdf .ig fdsa .. or .ig if asdf .if n \ foo for a laugh. It all works. Lots of regression tests supporting this and documentation for the same.
* Regression tests in place for `.if' in libroff.Kristaps Dzonsons2010-05-168-0/+98
Check against some strange `.if' constructs I missed. Added initial roff.7 manual.
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