TODO

   1 ************************************************************************
   2 * Official mandoc TODO.
   3 * $Id: TODO,v 1.201 2015/02/20 13:47:28 schwarze Exp $
   4 ************************************************************************
   5
   6 Many issues are annotated for difficulty as follows:
   7
   8  - loc = locality of the issue
   9     *    single file issue, affects file only, or very few
  10     **   single module issue, affects several files of one module
  11     ***  cross-module issue, significantly impacts multiple modules
  12          and may require substantial changes to internal interfaces
  13  - exist = difficulty of the existing code in this area
  14     *    affected code is straightforward and easy to read and change
  15     **   affected code is somewhat complex, but once you understand
  16          the design, not particularly difficult to understand
  17     ***  affected code uses a special, exceptionally tricky design
  18  - algo = difficulty of the new algorithm to be written
  19     *    the required logic and code is straightforward
  20     **   the required logic is somewhat complex and needs a careful design
  21     ***  the required logic is exceptionally tricky,
  22          maybe an approach to solve that is not even known yet
  23  - size = the amount of code to be written or changed
  24     *    a small number of lines (at most 100, usually much less)
  25     **   a considerable amount of code (several dozen to a few hundred)
  26     ***  a large amount of code (many hundreds, maybe thousands)
  27  - imp = importance of the issue
  28     *    mostly for completeness
  29     **   would be nice to have
  30     ***  issue causes considerable inconvenience
  31
  32 Obviously, as the issues have not been solved yet, these annotations
  33 are mere guesses, and some may be wrong.
  34
  35 ************************************************************************
  36 * crashes
  37 ************************************************************************
  38
  39 - The abort() in bufcat(), html.c, can be triggered via buffmt_includes()
  40   by running -Thtml -Oincludes on a file containing a long .In argument.
  41   Fixing this will probably require reworking the whole bufcat() concept.
  42   loc **  exist *  algo *  size **  imp **
  43
  44 ************************************************************************
  45 * missing features
  46 ************************************************************************
  47
  48 --- missing roff features ----------------------------------------------
  49
  50 - .ad (adjust margins)
  51   .ad l -- adjust left margin only (flush left)
  52   .ad r -- adjust right margin only (flush right)
  53   .ad c -- center text on line
  54   .ad b -- adjust both margins (alias: .ad n)
  55   .na   -- temporarily disable adjustment without changing the mode
  56   .ad   -- re-enable adjustment without changing the mode
  57   Adjustment mode is ignored while in no-fill mode (.nf).
  58   loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
  59
  60 - .fc (field control)
  61   found by naddy@ in xloadimage(1)
  62   loc **  exist ***  algo *  size *  imp *
  63
  64 - .nr third argument (auto-increment step size, requires \n+)
  65   found by bentley@ in sbcl(1)  Mon, 9 Dec 2013 18:36:57 -0700
  66   loc *  exist *  algo *  size *  imp **
  67
  68 - .ns (no-space mode) occurs in xine-config(1)
  69   reported by brad@  Sat, 15 Jan 2011 15:45:23 -0500
  70   loc ***  exist ***  algo ***  size **  imp *
  71
  72 - .ta (tab settings)
  73   #1 most important issue naddy@ Mon, 16 Feb 2015 20:59:17 +0100
  74   ircbug(1) gnats(1) reported by brad@  Sat, 15 Jan 2011 15:50:51 -0500
  75   also Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
  76   also posix2time(3) Carsten Kunze  Mon, 1 Dec 2014 13:03:10 +0100
  77   loc **  exist ***  algo **  size **  imp ***
  78
  79 - .ti (temporary indent)
  80   found by naddy@ in xloadimage(1) [devel/libvstr] vstr(3)
  81   found by bentley@ in nmh(1)  Mon, 23 Apr 2012 13:38:28 -0600
  82   loc **  exist **  algo **  size *  imp ** (parser reorg helps a lot)
  83
  84 - .while and .shift
  85   found by jca@ in ratpoison(1)  Sun, 30 Jun 2013 12:01:09 +0200
  86   loc *  exist **  algo **  size **  imp **
  87
  88 - \h horizontal move
  89   #2 most important issue naddy@  Mon, 16 Feb 2015 20:59:17 +0100
  90   found in cclive(1) nasm(1) bogofilter(1) asciidoc/DocBook output
  91   bentley@ on discuss@  Sat, 21 Sep 2013 22:29:34 -0600
  92   naddy@  Thu, 4 Dec 2014 16:26:41 +0100
  93   loc **  exist **  algo **  size *  imp *** (parser reorg helps a lot)
  94
  95 - \n+ and \n- numerical register increment and decrement
  96   found by bentley@ in sbcl(1)  Mon, 9 Dec 2013 18:36:57 -0700
  97   loc *  exist *  algo *  size *  imp **
  98
  99 - \n(.$ macro argument count number register; ocserv(8) by autogen
 100   found by sthen@  Thu, 19 Feb 2015 22:03:01 +0000
 101   loc *  exist **  algo *  size *  imp **
 102
 103 - \w'' improve width measurements
 104   would not be very useful without an expression parser, see below
 105   needed for Tcl_NewStringObj(3) via wiz@  Wed, 5 Mar 2014 22:27:43 +0100
 106   loc **  exist ***  algo ***  size *  imp ***
 107
 108 - using undefined strings or macros defines them to be empty
 109   wl@  Mon, 14 Nov 2011 14:37:01 +0000
 110   loc *  exist *  algo *  size *  imp *
 111
 112 --- missing mdoc features ----------------------------------------------
 113
 114 - .Bl -column .Xo support is missing
 115   ultimate goal:
 116   restore .Xr and .Dv to
 117   lib/libc/compat-43/sigvec.3
 118   lib/libc/gen/signal.3
 119   lib/libc/sys/sigaction.2
 120   loc *  exist ***  algo ***  size *  imp **
 121
 122 - edge case: decide how to deal with blk_full bad nesting, e.g.
 123   .Sh .Nm .Bk .Nm .Ek .Sh found by jmc@ in ssh-keygen(1)
 124   from jmc@  Wed, 14 Jul 2010 18:10:32 +0100
 125   loc *  exist ***  algo ***  size **  imp **
 126
 127 - .Bd -centered implies -filled, not -unfilled, which is not
 128   easy to implement; it requires code similar to .ce, which
 129   we don't have either.
 130   Besides, groff has bug causing text right *before* .Bd -centered
 131   to be centered as well.
 132   loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
 133
 134 - .Bd -filled should not be the same as .Bd -ragged, but align both
 135   the left and right margin.  In groff, it is implemented in terms
 136   of .ad b, which we don't have either.  Found in cksum(1).
 137   loc ***  exist ***  algo **  size **  imp **  (parser reorg would help)
 138
 139 - implement blank `Bl -column', such as
 140   .Bl -column
 141   .It foo Ta bar
 142   .El
 143   loc *  exist ***  algo ***  size *  imp *
 144
 145 - explicitly disallow nested `Bl -column', which would clobber internal
 146   flags defined for struct mdoc_macro
 147   loc *  exist *  algo *  size *  imp **
 148
 149 - In .Bl -column .It, the end of the line probably has to be regarded
 150   as an implicit .Ta, if there could be one, see the following mildly
 151   ugly code from login.conf(5):
 152     .Bl -column minpasswordlen program xetcxmotd
 153     .It path Ta path Ta value of Dv _PATH_DEFPATH
 154     .br
 155     Default search path.
 156   reported by Michal Mazurek <akfaew at jasminek dot net>
 157   via jmc@ Thu, 7 Apr 2011 16:00:53 +0059
 158   loc *  exist ***  algo **  size *  imp **
 159
 160 - inside `.Bl -column' phrases, punctuation is handled like normal
 161   text, e.g. `.Bl -column .It Fl x . Ta ...' should give "-x -."
 162
 163 - inside `.Bl -column' phrases, TERMP_IGNDELIM handling by `Pf'
 164   is not safe, e.g. `.Bl -column .It Pf a b .' gives "ab."
 165   but should give "ab ."
 166
 167 - check whether it is correct that `D1' uses INDENT+1;
 168   does it need its own constant?
 169   loc *  exist **  algo **  size *  imp **
 170
 171 - prohibit `Nm' from having non-text HEAD children
 172   (e.g., NetBSD mDNSShared/dns-sd.1)
 173   (mdoc_html.c and mdoc_term.c `Nm' handlers can be slightly simplified)
 174
 175 - support translated section names
 176   e.g. x11/scrotwm scrotwm_es.1:21:2: error: NAME section must be first
 177   that one uses NOMBRE because it is spanish...
 178   deraadt tends to think that section-dependent macro behaviour
 179   is a bad idea in the first place, so this may be irrelevant
 180   loc **  exist **  algo **  size *  imp **
 181
 182 - When there is free text in the SYNOPSIS and that free text contains
 183   the .Nm macro, groff somehow understands to treat the .Nm as an in-line
 184   macro, while mandoc treats it as a block macro and breaks the line.
 185   No idea how the logic for distinguishing in-line and block instances
 186   should be, needs investigation.
 187   uqs@  Thu, 2 Jun 2011 11:03:51 +0200
 188   uqs@  Thu, 2 Jun 2011 11:33:35 +0200
 189   loc *  exist **  algo ***  size *  imp **
 190
 191 --- missing man features -----------------------------------------------
 192
 193 - -T[x]html doesn't stipulate non-collapsing spaces in literal mode
 194
 195 --- missing tbl features -----------------------------------------------
 196
 197 - look at the POSIX manuals in the books/man-pages-posix port,
 198   they use some unsupported tbl(7) features.
 199   loc *  exist **  algo **  size **  imp ***
 200
 201 - use Unicode U+2500 to U+256C for table borders
 202   in tbl(7) -Tutf-8 output
 203   suggested by bentley@  Tue, 14 Oct 2014 04:10:55 -0600
 204   loc *  exist **  algo *  size *  imp **
 205
 206 - allow standalone `.' to be interpreted as an end-of-layout
 207   delimiter instead of being thrown away as a no-op roff line
 208   reported by Yuri Pankov, Wed 18 May 2011 11:34:59 CEST
 209   loc **  exist **  algo **  size *  imp **
 210
 211 --- missing eqn features -----------------------------------------------
 212
 213 - The "size" keyword is parsed, but ignored by the formatter.
 214   loc *  exist *  algo *  size *  imp *
 215
 216 - The spacing characters `~', `^', and tab are currently ignored,
 217   see User's Guide (Second Edition) page 2 section 4.
 218   loc *  exist *  algo **  size *  imp **
 219
 220 - Mark and lineup are parsed and ignored,
 221   see User's Guide (Second Edition) page 5 section 15.
 222   loc **  exist **  algo **  size **  imp **
 223
 224 --- missing misc features ----------------------------------------------
 225
 226 - italic correction (\/) in PostScript mode
 227   Werner LEMBERG on groff at gnu dot org  Sun, 10 Nov 2013 12:47:46
 228   loc **  exist **  algo *  size *  imp *
 229
 230 - When makewhatis(8) encounters a FATAL parse error,
 231   it silently treats the file as formatted, which makes no sense
 232   at all for paths like man1/foo.1 - and which also contradicts
 233   what the manual says at the end of the description.
 234   The end result will be ENOENT for file names returned
 235   by mansearch() in manpage.file.
 236   loc *  exist *  algo *  size *  imp **
 237
 238 - makewhatis(8) for preformatted pages:
 239   parse the section number from the header line
 240   and compare to the section number from the directory name
 241   loc *  exist *  algo *  size *  imp **
 242
 243 - Does makewhatis(8) detect missing NAME sections, missing names,
 244   and missing descriptions in all the file formats?
 245   loc *  exist *  algo *  size *  imp ***
 246
 247 - clean up escape sequence handling, creating three classes:
 248   (1) fully implemented, or parsed and ignored without loss of content
 249   (2) unimplemented, potentially causing loss of content
 250       or serious mangling of formatting (e.g. \n) -> ERROR
 251       see textproc/mgdiff(1) for nice examples
 252   (3) undefined, just output the character -> perhaps WARNING
 253   loc ***  exist **  algo **  size **  imp *** (parser reorg helps)
 254
 255 - kettenis wants base roff, ms, and me  Fri, 1 Jan 2010 22:13:15 +0100 (CET)
 256   loc **  exist **  algo **  size ***  imp *
 257
 258 --- compatibility checks -----------------------------------------------
 259
 260 - write a configure check for [[:<:]] support and provide some
 261   fallback for whatis(1) when it doesn't work;
 262   Svyatoslav Mishyn  Wed, 17 Dec 2014 11:07:10 +0200
 263
 264 - is .Bk implemented correctly in modern groff?
 265   sobrado@  Tue, 19 Apr 2011 22:12:55 +0200
 266
 267 - compare output to Heirloom roff, Solaris roff, and
 268   http://repo.or.cz/w/neatroff.git  http://litcave.rudi.ir/
 269
 270 - look at AT&T DWB http://www2.research.att.com/sw/download
 271   Carsten Kunze <carsten dot kunze at arcor dot de> has patches
 272   Mon, 4 Aug 2014 17:01:28 +0200
 273
 274 - look at pages generated from reStructeredText, e.g. devel/mercurial hg(1)
 275   These are a weird mixture of man(7) and custom autogenerated low-level
 276   roff stuff.  Figure out to what extent we can cope.
 277   For details, see http://docutils.sourceforge.net/rst.html
 278   noted by stsp@  Sat, 24 Apr 2010 09:17:55 +0200
 279   reminded by nicm@  Mon, 3 May 2010 09:52:41 +0100
 280
 281 - look at pages generated from ronn(1) github.com/rtomayko/ronn
 282   (based on markdown)
 283
 284 - look at pages generated from Texinfo source by yat2m, e.g. security/gnupg
 285   First impression is not that bad.
 286
 287 - look at pages generated by pandoc; see
 288   https://github.com/jgm/pandoc/blob/master/src/Text/Pandoc/Writers/Man.hs
 289   porting planned by kili@  Thu, 19 Jun 2014 19:46:28 +0200
 290
 291 - check compatibility with Plan9:
 292   http://swtch.com/usr/local/plan9/tmac/tmac.an
 293   http://swtch.com/plan9port/man/man7/man.html
 294   "Anthony J. Bentley" <anthonyjbentley@gmail.com> 28 Dec 2010 21:58:40 -0700
 295
 296 - check compatibility with the man(7) formatter
 297   https://raw.githubusercontent.com/rofl0r/hardcore-utils/master/man.c
 298
 299 - check compatibility with
 300   http://ikiwiki.info/plugins/contrib/mandoc/
 301   https://github.com/schmonz/ikiwiki/compare/mandoc
 302   Amitai Schlair  Mon, 19 May 2014 14:05:53 -0400
 303
 304 ************************************************************************
 305 * formatting issues: ugly output
 306 ************************************************************************
 307
 308 - revisit empty in-line macros
 309   look at the difference between "Em x Em ." and "Sq x Em ."
 310   Carsten Kunze  Fri, 12 Dec 2014 00:15:41 +0100
 311   loc *** exist *** algo *** size * imp **
 312
 313 - a column list with blank `Ta' cells triggers a spurious
 314   start-with-whitespace printing of a newline
 315
 316 - In .Bl -column, .It a<tab>"b<tab>c"
 317   shows the quotes in groff, but not in mandoc
 318   loc * exist *** algo ** size * imp **
 319
 320 - In .Bl -column,
 321   .It Em Authentication<tab>Key Length
 322   ought to render "Key Length" with emphasis, too,
 323   see OpenBSD iked.conf(5).
 324   reported again Nicolas Joly via wiz@ Wed, 12 Oct 2011 00:20:00 +0200
 325   loc *  exist ***  algo ***  size **  imp ***
 326
 327 - empty phrases in .Bl column produce too few blanks
 328   try e.g. .Bl -column It Ta Ta
 329   reported by millert Fri, 02 Apr 2010 16:13:46 -0400
 330   loc *  exist ***  algo ***  size *  imp **
 331
 332 - .%T can have trailing punctuation.  Currently, it puts the trailing
 333   punctuation into a trailing MDOC_TEXT element inside its own scope.
 334   That element should rather be outside its scope, such that the
 335   punctuation does not get underlines.  This is not trivial to
 336   implement because .%T then needs some features of in_line_eoln() -
 337   slurp all arguments into one single text element - and one feature
 338   of in_line() - put trailing punctuation out of scope.
 339   Found in mount_nfs(8) and exports(5), search for "Appendix".
 340   loc **  exist **  algo ***  size *  imp **
 341
 342 - Trailing punctuation after .%T triggers EOS spacing, at least
 343   outside .Rs (eek!).  Simply setting ARGSFL_DELIM for .%T is not
 344   the right solution, it sends mandoc into an endless loop.
 345   reported by Nicolas Joly  Sat, 17 Nov 2012 11:49:54 +0100
 346   loc *  exist **  algo **  size *  imp **
 347
 348 - global variables in the SYNOPSIS of section 3 pages
 349   .Vt vs .Vt/.Va vs .Ft/.Va vs .Ft/.Fa ...
 350   from kristaps@  Tue, 08 Jun 2010 11:13:32 +0200
 351
 352 - in enclosures, mandoc sometimes fancies a bogus end of sentence
 353   reminded by jmc@  Thu, 23 Sep 2010 18:13:39 +0059
 354   loc *  exist **  algo ***  size *  imp ***
 355
 356 - a line starting with "\fB something" counts as starting with whitespace
 357   and triggers a line break; found in audio/normalize-mp3(1)
 358   loc **  exist *  algo **  size *  imp **
 359
 360 - formatting /usr/local/man/man1/latex2man.1 with groff and mandoc
 361   reveals lots of bugs both in groff and mandoc...
 362   reported by bentley@  Wed, 22 May 2013 23:49:30 -0600
 363
 364 --- PDF issues ---------------------------------------------------------
 365
 366 - PDF output doesn't use a monospaced font for .Bd -literal
 367   Example: "mandoc -Tpdf afterboot.8 > output.pdf && pdfviewer output.pdf".
 368   Search the text "Routing tables".
 369   Also check what PostScript mode does when fixing this.
 370   reported by juanfra@ Wed, 04 Jun 2014 21:44:58 +0200
 371   instructions from juanfra@  Wed, 11 Jun 2014 02:21:01 +0200
 372     add a new <</Type /Font>> block to the PDF files with /BaseFont /Courier
 373     and change the /Name from /F0 to the new font (/F5 (?)).
 374   loc *  exist **  algo **  size *  imp **
 375
 376 --- HTML issues --------------------------------------------------------
 377
 378 - <dl><dt><dd> formatting is ugly
 379   hints are easy to find on the web, e.g.
 380   http://stackoverflow.com/questions/1713048/
 381   see also matthew@  Fri, 18 Jul 2014 19:25:12 -0700
 382   loc *  exist *  algo **  size *  imp ***
 383
 384 - jsg on icb, Nov 3, 2014:
 385   try to guess Xr in man(7) for hyperlinking
 386
 387 - The tables used to render the three-part page headers actually force
 388   the width of the <body> to the max-width given for <html>.
 389   Not yet sure how to fix that...
 390   Observed by an Anonymous Coward on undeadly.org:
 391   http://undeadly.org/cgi?action=article&sid=20140925064244&pid=1
 392   loc *  exist *  algo **  size *  imp ***
 393
 394 - consider whether <var> can be used for Ar Dv Er Ev Fa Va.
 395   from bentley@  Wed, 13 Aug 2014 09:17:55 -0600
 396
 397 - check https://github.com/trentm/mdocml
 398
 399 ************************************************************************
 400 * formatting issues: gratuitous differences
 401 ************************************************************************
 402
 403 - .Fn reopens a new scope after punctuation in mandoc,
 404   but closes its scope for good in groff.
 405   Do we want to change mandoc or groff?
 406   Steffen Nurpmeso  Sat, 08 Nov 2014 13:34:59 +0100
 407   loc *  exist **  algo **  size *  imp **
 408
 409 - In .Bl -enum -width 0n, groff continues one the same line after
 410   the number, mandoc breaks the line.
 411   mail to kristaps@  Mon, 20 Jul 2009 02:21:39 +0200
 412   loc *  exist **  algo **  size *  imp **
 413
 414 - .Pp between two .It in .Bl -column should produce one,
 415   not two blank lines, see e.g. login.conf(5).
 416   reported by jmc@  Sun, 17 Apr 2011 14:04:58 +0059
 417   reported again by sthen@  Wed, 18 Jan 2012 02:09:39 +0000 (UTC)
 418   loc *  exist ***  algo **  size *  imp **
 419
 420 - If the *first* line after .It is .Pp, break the line right after
 421   the tag, do not pad with space characters before breaking.
 422   See the description of the a, c, and i commands in sed(1).
 423   loc *  exist **  algo **  size *  imp **
 424
 425 - If the first line after .It is .D1, do not assert a blank line
 426   in between, see for example tmux(1).
 427   reported by nicm@  13 Jan 2011 00:18:57 +0000
 428   loc *  exist **  algo **  size *  imp **
 429
 430 - Trailing punctuation after .It should trigger EOS spacing.
 431   reported by Nicolas Joly  Sat, 17 Nov 2012 11:49:54 +0100
 432   Probably, this should be fixed somewhere in termp_it_pre(), not sure.
 433   loc *  exist **  algo **  size *  imp **
 434
 435 - .Nx 1.0a
 436   should be "NetBSD 1.0A", not "NetBSD 1.0a",
 437   see OpenBSD ccdconfig(8).
 438   loc *  exist *  algo *  size *  imp **
 439
 440 - In .Bl -tag, if a tag exceeds the right margin and must be continued
 441   on the next line, it must be indented by -width, not width+1;
 442   see "rule block|pass" in OpenBSD ifconfig(8).
 443   loc *  exist ***  algo **  size *  imp **
 444
 445 - When the -width string contains macros, the macros must be rendered
 446   before measuring the width, for example
 447     .Bl -tag -width ".Dv message"
 448   in magic(5), located in src/usr.bin/file, is the same
 449   as -width 7n, not -width 11n.
 450   The same applies to .Bl -column column widths;
 451   reported again by Nicolas Joly Thu, 1 Mar 2012 13:41:26 +0100 via wiz@ 5 Mar
 452   reported again by Franco Fichtner Fri, 27 Sep 2013 21:02:28 +0200
 453   loc ***  exist ***  algo ***  size **  imp ***
 454   An easy partial fix would be to just skip the first word if it starts
 455   with a dot, including any following white space, when measuring.
 456   loc *  exist *  algo *  size *  imp ***
 457
 458 - The \& zero-width character counts as output.
 459   That is, when it is alone on a line between two .Pp,
 460   we want three blank lines, not two as in mandoc.
 461   loc **  exist **  algo **  size *  imp **
 462
 463 - Header lines of excessive length:
 464   Port OpenBSD man_term.c rev. 1.25 to mdoc_term.c
 465   and document it in mdoc(7) and man(7) COMPATIBILITY
 466   found while talking to Chris Bennett
 467   loc *  exist *  algo *  size *  imp *
 468
 469 - trailing whitespace must be ignored even when followed by a font escape,
 470   see for example
 471     makes
 472     \fBdig \fR
 473     operate in batch mode
 474   in dig(1).
 475   loc **  exist **  algo **  size *  imp **
 476
 477 ************************************************************************
 478 * warning issues
 479 ************************************************************************
 480
 481 - check that MANDOCERR_BADTAB is thrown in the right cases,
 482   i.e. when finding a literal tab character in fill mode,
 483   and possibly change the wording of the warning message
 484   to refer to fill mode, not literal mode
 485   See the mail from Werner LEMBERG on the groff list,
 486   Fri, 14 Feb 2014 18:54:42 +0100 (CET)
 487   loc *  exist **  algo **  size *  imp **
 488
 489 - warn about attempts to call non-callable macros
 490   Steffen Nurpmeso  Tue, 11 Nov 2014 22:55:16 +0100
 491   Note that formatting is inconsistent in groff.
 492   .Fn Po prints "Po()", .Ar Sh prints "file ..." and no "Sh".
 493   Relatively hard because the relevant code is scattered
 494   all over mdoc_macro.c and all subtly different.
 495   loc **  exist **  algo **  size **  imp **
 496
 497 - warn about "new sentence, new line"
 498   loc **  exist **  algo ***  size *  imp **
 499
 500 - mandoc_special does not really check the escape sequence,
 501   but just the overall format
 502   loc **  exist **  algo ***  size **  imp **
 503
 504 - integrate mdoclint into mandoc ("end-of-line whitespace" thread)
 505   from jmc@  Mon, 13 Jul 2009 17:12:09 +0100
 506   from kristaps@  Mon, 13 Jul 2009 18:34:53 +0200
 507   from jmc@  Mon, 13 Jul 2009 17:45:37 +0059
 508   from kristaps@  Mon, 13 Jul 2009 19:02:03 +0200
 509   (mostly done, check what remains)
 510
 511 - -Tlint parser errors and warnings to stdout
 512   to tech@mdocml, naddy@  Wed, 28 Sep 2011 11:21:46 +0200
 513   wait!  kristaps@  Sun, 02 Oct 2011 17:12:52 +0200
 514
 515 - for system errors, use errno/strerror/warn/err
 516
 517 ************************************************************************
 518 * documentation issues
 519 ************************************************************************
 520
 521 - mention hyphenation rules:
 522   breaking at letter-letter in text mode (not macro args)
 523   proper hyphenation is unimplemented
 524
 525 - talk about spacing around delimiters
 526   to jmc@, kristaps@  Sat, 23 Apr 2011 17:41:27 +0200
 527
 528 - mark macros as: page structure domain, manual domain, general text domain
 529   is this useful?
 530
 531 - mention /usr/share/misc/mdoc.template in mdoc(7)?
 532
 533 - Is all the content from http://www.std.com/obi/BSD/doc/usd/28.tbl/tbl
 534   covered in tbl(7)?
 535
 536 ************************************************************************
 537 * performance issues
 538 ************************************************************************
 539
 540 - Why are we using MAP_SHARED, not MAP_PRIVATE for mmap(2)?
 541   How does SQLITE_CONFIG_PAGECACHE actually work?  Document it!
 542   from kristaps@  Sat, 09 Aug 2014 13:51:36 +0200
 543
 544 Several areas can be cleaned up to make mandoc even faster.  These are
 545
 546 - improve hashing mechanism for macros (quite important: performance)
 547
 548 - improve hashing mechanism for characters (not as important)
 549
 550 - the PDF file is HUGE: this can be reduced by using relative offsets
 551
 552 - instead of re-initialising the roff predefined-strings set before each
 553   parse, create a read-only version the first time and copy it
 554   loc *  exist **  algo **  size *  imp **
 555
 556 ************************************************************************
 557 * structural issues
 558 ************************************************************************
 559
 560 - Use libz directly instead of forking gunzip(1).
 561   Suggested by bapt at FreeBSD among others.
 562
 563 - We use the input line number at several places to distinguish
 564   same-line from different-line input.  That plainly doesn't work
 565   with user-defined macros, leading to random breakage.
 566
 567 - Find better ways to prevent endless loops
 568   in roff(7) macro and string expansion.
 569
 570 - Finish cleanup of date handling.
 571   Decide which formats should be recognized where.
 572   Update both mdoc(7) and man(7) documentation.
 573   Triggered by  Tim van der Molen  Tue, 22 Feb 2011 20:30:45 +0100
 574
 575 - struct mparse refactoring
 576   Steffen Nurpmeso  Thu, 04 Sep 2014 12:50:00 +0200
 577
 578 - Consider creating some views that will make the database more
 579   readable from the sqlite3 shell.  Consider using them to
 580   abstract from the database structure, too.
 581   suggested by espie@  Sat, 19 Apr 2014 14:52:57 +0200
 582
 583 ************************************************************************
 584 * CGI issues
 585 ************************************************************************
 586
 587  - Enable HTTP compression by detecting gzip encoding and filtering
 588    output through libz.
 589  - Sandbox (see OpenSSH).
 590  - Enable caching support via HTTP 304 and If-Modified-Since.
 591  - Allow for cgi.h to be overridden by CGI environment variables.
 592    Otherwise, binary distributions will inherit the compile-time
 593    behaviour, which is not optimal.
 594  - Have Mac OSX systems automatically disable -static compilation of the
 595    CGI: -static isn't supported.
 596
 597 ************************************************************************
 598 * to improve in the groff_mdoc(7) macros
 599 ************************************************************************
 600
 601 - use uname(1) to set doc-default-operating-system at install time
 602   tobimensch  Mon, 1 Dec 2014 00:25:07 +0100