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* The syntax of the roff(7) .mc request is quite specialIngo Schwarze2022-04-285-2/+65
| | | | | | | | | and the roff_onearg() parsing function is too generic, so provide a dedicated parsing function instead. This fixes an assertion failure when an \o escape sequence is passed as the argument; the bug was found by tb@ using afl(1). It also makes mandoc output more similar to groff in various cases.
* Element next-line scopes may nest, so man_breakscope() may have toIngo Schwarze2022-04-284-3/+41
| | | | | | | | break multiple element next-line scopes at the same time, similar to what man_descope() already does for unconditional rewinding. This fixes an assertion failure that tb@ found with afl(1), caused by .SH .I .I .BI and similar sequences of macros without arguments.
* The .AT, .DT, and .UC macros are allowed inside next-line scopeIngo Schwarze2022-04-2710-2/+98
| | | | | | and never produce output at the place of their invocation. Minibugs found while investigating unrelated afl(1) reports from tb@.
* Fix three bugs regarding the interaction of \z and \h:Ingo Schwarze2022-04-275-4/+41
| | | | | | | | | | | | | | | | | | | | 1. The combination \z\h is a no-op whatever the argument may be. In the past, the \z only affected the first space character generated by the \h, which was wrong. 2. For the conbination \zX\h with a positive argument, the first space resulting from the \h is not printed but consumed by the \z. 3. For the combination \zX\h with a negative argument, application of the \z needs to be completed before the \h can be started. In the past, if this combination occurred at the beginning of an output line, the \h backed up to the beginning of the line and after that, the \z attempted to back up even further, triggering an assertion. Bugs found during an audit of assignments to termp->col that i started after the bugfix tbl_term.c rev. 1.65. The assertion triggered by bug 3 was *not* yet found by afl(1).
* typo in example text: unsused -> unused; noticed by tb@Ingo Schwarze2022-04-264-5/+5
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* At the end of every tbl(7) cell, clear the \z state.Ingo Schwarze2022-04-265-4/+63
| | | | | | | | | This is needed because the TERMP_MULTICOL mode is designed such that term_tbl() buffers all the cells of the table row before the normal reset logic near the end of term_flushln() can be reached. This fixes an assertion failure triggered by \z near the end of a table cell, found by tb@ using afl(1).
* If a node is tagged explicitly, skip implicit tagging for that node.Ingo Schwarze2022-04-266-4/+51
| | | | | | | | Apart from making sense in the first place, this fixes an assertion failure that happened when the calculated implicit tag did not match the string value of the first child of the node, Bug found by tb@ using afl(1).
* If a .shift request has a negative argument, do not use a negative arrayIngo Schwarze2022-04-243-6/+13
| | | | | | | | index but use 0 instead of the argument, just like groff. Warn about the invalid argument. While here, fix the column number in another warning message. Segfault reported by tb@, found with afl(1).
* To prevent infinite recursion while expanding eqn(7) definitions,Ingo Schwarze2022-04-133-6/+75
| | | | | | | | | | | | | | | | | | | | | | | | | | | we must not reset the recursion counter when moving beyond the end of the *previous* expansion, but we may only do so when moving beyond the rightmost position reached by *any* expansion in the current equation. This matters because definitions can nest; consider: .EQ define inner "content" define outer "inner outer" outer .EN This endless loop was found by tb@ using afl(1). Incidentally, GNU eqn(1) also performs an infinite loop in this situation and then crashes when memory runs out, but that's not an excuse for nasty behaviour of mandoc(1). While here, consistently print the expanded content even when the expansion is finally truncated. While that is not likely to help end-users, it may help authors of eqn(7) code to understand what's going on. Besides, it sends a very clear signal that something is amiss, which was easy to miss in the past unless people enabled -W error or used -T lint.
* Do not die on an assertion if an input file contains no sectionIngo Schwarze2022-04-133-3/+5
| | | | | | | | | whatsoever and ends with a broken next-line scope. Obviously, this cannot happen in a real manual page, but mandoc(1) should not die even when fed absurd input. This bug was independently reported by both jsg@ and tb@ who both found it with afl(1).
* Surprisingly, groff supports multiple copy mode escapes at theIngo Schwarze2022-04-133-2/+50
| | | | | | | | | | | | | beginning of an escape sequence: \, \E, \EE, \EEE, and so on all do the same outside copy mode, so let them do the same in mandoc(1), too. This fixes an assertion failure triggered by \EE*X that tb@ found with afl(1). The first E was consumed by roff_expand(), but that function failed to recognize the escape sequence as the expansion of a user-defined string and handed it over to mandoc_escape(), which consumed the second E and then died on an assertion because it is not prepared to handle user-defined strings. Fix this by letting *both* functions handle arbitrary numbers of 'E's correctly.
* do not use the sed(1) -i option, it is not portable;Ingo Schwarze2021-09-191-5/+6
| | | | issue found on Oracle Solaris 11
* Correctly calculate required column widths for tables containingIngo Schwarze2021-09-072-3/+20
| | | | | | | cells that horizontally span columns which contains "n" (number) formatted cells on other rows. This requires updating total column widths from "n" formatted cells before starting width distribution from the spanning cells to their constituent columns.
* Support two-character font names (BI, CW, CR, CB, CI)Ingo Schwarze2021-08-1010-23/+55
| | | | | | | | | | | | | | | | | | | | | | | | in the tbl(7) layout font modifier. Get rid of the TBL_CELL_BOLD and TBL_CELL_ITALIC flags and use the usual ESCAPE_FONT* enum mandoc_esc members from mandoc.h instead, which simplifies and unifies some code. While here, also support CB and CI in roff(7) \f escape sequences and in roff(7) .ft requests for all output modes. Using those is certainly not recommended because portability is limited even with groff, but supporting them makes some existing third-party manual pages look better, in particular in HTML output mode. Bug-compatible with groff as far as i'm aware, except that i consider font names starting with the '\n' (ASCII 0x0a line feed) character so insane that i decided to not support them. Missing feature reported by nabijaczleweli dot xyz in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=992002. I used none of the code from the initial patch submitted by nabijaczleweli, but some of their ideas. Final patch tested by them, too.
* delete the two pairs of extra blank lines from expected man(7) terminalIngo Schwarze2021-06-28216-864/+22
| | | | output that are no longer printed since man_term.c rev. 1.236
* test private use areas some more as they have proven fragileIngo Schwarze2021-06-028-38/+74
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* Cleanup:Ingo Schwarze2021-06-024-53/+57
| | | | | | | | | | 1. Move invalid two-byte sequences after valid ones and make their descriptions easier to understand. 2. Replace the wrong and confusing expression "middle byte" with the correct term "start byte". 3. Add test lines for U+EFFFF and U+F0000. 4. Replace the unhelpful word "strange" with more descriptive terms. Arguably, nothing about this (or maybe everything?) is strange.
* The wcwidth(3) of Plane 15 and Plane 16 Private Use CharactersIngo Schwarze2021-06-022-4/+4
| | | | | was changed from 0 to 1. Adjust the test results accordingly. Issue reported by bluhm@
* test font modifiers in the layout; related to tbl_html.c rev. 1.34Ingo Schwarze2021-05-164-2/+49
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* In HTML output, correctly render .Bd -unfilled in proportionally-spacedIngo Schwarze2021-03-301-1/+1
| | | | | | | | | | | font, rather than with the monospace font appropriate for .Bd -literal. This fixes a minibug reported by anton@. Implemented by no longer relying on the typical browser default of "pre { font-family: monospace }" but instead letting <pre> elements inherit the font family from their parent, then adding an explicit CSS .Li class only for those displays where the manual page author requested it by using the -literal option on the .Bd macro.
* Rename syntax test of the \O escape sequence (suppress output groffIngo Schwarze2020-12-216-26/+26
| | | | | | extension; mandoc only implements syntax checking but ignores the sequence) to please Bill Gates and didickman@: avoid path names that only differ by case, like o.in vs. O.in.
* The GNU tbl(1) program contained in the groff package internallyIngo Schwarze2020-10-256-6/+6
| | | | | | | | | | | | | | | | | | uses roff(7) tabulator settings to implement tables, and it used to leak the changed tabulator settings from tables to the subsequent roff(7) code. In mandoc/tbl_term.c rev. 1.54 (June 17, 2017), code was added to be bug-compatible with groff. In commit d0e03cf6 (Oct 20, 2020), GNU tbl(1) changed behaviour to save the tabulator settings before starting a table and restore them afterwards. Adjust mandoc for compatibility. Since mandoc implements tables without using roff(7) tabulator settings, saving and restoring tabulator settings is not needed in mandoc. Simply deleting the code that changed tabulator settings by reverting tbl_term.c rev. 1.54 is sufficient in mandoc. Also adjust the desired output of the regression tests to match the new behaviour of both groff and mandoc.
* Treat \*[.T] in the same way as \*(.T rather than calling abort(3).Ingo Schwarze2020-10-247-13/+20
| | | | | Bug found because the groff-current manual pages started using the variant form of this predefined string.
* In HTML output, avoid printing a newline right after <pre>Ingo Schwarze2020-10-1610-97/+47
| | | | | | | | and right before </pre> because that resulted in vertical whitespace not requested by the manual page author. Formatting bug reported by Aman Verma <amanraoverma plus vim at gmail dot com> on discuss@.
* Element next-line scopes can nest. Consequently, even when closingIngo Schwarze2020-09-095-10/+34
| | | | | | | | one element next-line scope, the MAN_ELINE flag must not yet be cleared if the parent macro is another element macro having next-line scope, or an assertion failure is caused if all this is wrapped in another macro that has block next-line scope, for example .TP. Bug found in an afl run performed by Jan Schreiber <jes at posteo dot de>.
* Fix two issues with .po (page offset) formatting:Ingo Schwarze2020-09-033-2/+53
| | | | | | | | | | | | 1. Truncate excessive offsets to a width reasonable in the context of manual pages instead of printing excessively long lines and sometimes causing assertion failures; found in an afl run performed by Jan Schreiber <jes at posteo dot de>. 2. Remember both the requested and the applied page offset; otherwise, subtracting an excessive width, then adding it again, would end up with an incorrectly large offset. While here, simplify the code by reverting the previous offset up front, and also add some comments to make the general ideas easier to understand.
* If .ti had an excessive argument, using it was attempted, in someIngo Schwarze2020-09-033-2/+49
| | | | | | | | cases resulting in an assertion failure. Instead, truncate the temporary indent to a width reasonable in a manual page. I found the issue in an afl run that was performed by Jan Schreiber <jes at posteo dot de>.
* Do not indent by SIZE_MAX/2 when .ce occurs inside explicit no-fill mode.Ingo Schwarze2020-09-022-4/+20
| | | | | | | | While here, drop two unused arguments from the function term_field(); the related work was already done by term_fill() before this commit. I found the bug in an afl run that was performed by Jan Schreiber <jes at posteo dot de>.
* Ignore unreasonably large spacing modifiers in tbl layouts.Ingo Schwarze2020-09-016-4/+120
| | | | | | Jan Schreiber <jes at posteo dot de> ran afl on mandoc and it turned out mandoc tried to use spacing modifiers so large that they would trigger assertion failures in term_ascii.c, function locale_advance().
* Put the code handling \} into a new function roff_cond_checkend()Ingo Schwarze2020-08-037-6/+95
| | | | | | | | | | | | | | | | | | | | and call that function not only from both places where copies existed - when processing text lines and when processing request/macro lines in conditional block scope - but also when closing a macro definition request, such that this construction works: .if n \{.de macroname macro content .. \} ignored arguments .macroname This fixes a bug reported by John Gardner <gardnerjohng at gmail dot com>. While here, avoid a confusing decrement of the line scope counter in roffnode_cleanscope() for conditional blocks that do not have line scope in the first place (no functional change for this part). Also improve validation of an internal invariant in roff_cblock() and polish some comments.
* trivial sync with OpenBSDIngo Schwarze2020-07-302-10/+10
| | | | | in parts of these files that are not used by -portable; consequently, no functional change
* trivial adjustment of the desired test resultsIngo Schwarze2020-07-2128-155/+155
| | | | after getting rid of the "copyless" crutch
* adjust test framework to not require a ttyIngo Schwarze2020-07-212-16/+3
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* While we do not recommend the idiom ".Fl Fl long" for long optionsIngo Schwarze2020-04-266-4/+65
| | | | | | | | | | | because it is an abuse of semantic macros for device-specific presentational effects, this idiom is so widespread that it makes sense to convert it to the recommended ".Fl \-long" during the validation phase. For example, this improves HTML formatting in pages where authors have used the dubious .Fl Fl. Feature suggested by Steffen Nurpmeso <steffen at sdaoden dot eu> on freebsd-hackers.
* In fragment identifiers, use ~%d for ordinal suffixes,Ingo Schwarze2020-04-205-8/+8
| | | | | | | | | and reserve the character '~' for that purpose. Bug found by validator.w3.org in openssl(1), which contains both a tag "tls1_2" and a second instance of a tag "tls1", which also resulted in "tls1_2", causing a clash. Now, the second instance of "tls1" is rendered as "tls1~2" instead, employing the newly reserved '~'.
* When .Bd, .D1, or .Dl is tagged, attach the permalinkIngo Schwarze2020-04-1922-46/+110
| | | | to the first few letters, similar to what was earlier done for .Pp.
* When a .Tg is attached to a paragraph, attach the permalinkIngo Schwarze2020-04-189-14/+37
| | | | to the first word, or the first few words if they are short.
* Separate the place to put the <a href> permalink (now markedIngo Schwarze2020-04-0716-36/+36
| | | | | | | with NODE_HREF) from the target element of the link (still marked with NODE_ID). In many cases, use this to move the target to the beginning of the paragraph, such that readers don't get dropped into the middle of a sentence.
* Support manual tagging of .Pp, .Bd, .D1, .Dl, .Bl, and .It.Ingo Schwarze2020-04-0641-36/+215
| | | | | | In HTML output, improve the logic for writing inside permalinks: skip them when there is no child content or when there is a risk that the children might contain flow content.
* automatically tag .SH and .SS in man(7) terminal outputIngo Schwarze2020-04-047-2/+18
| | | | in the same way as it was done for .Sh and .Ss in mdoc(7)
* Copy tagged strings before marking hyphens as breakable.Ingo Schwarze2020-04-0216-22/+37
| | | | For example, this makes ":tCo-processes" work in ksh(1).
* Just like we are already doing it in HTML output, automatically tagIngo Schwarze2020-04-0120-5/+84
| | | | | | | section and subsection headers in terminal output, too. Even though admittedly, commands like "/SEE" and "/ Subsec" work, too, there is no downside, and besides, with the recent improvements in the tagging framework, implementation cost is negligible.
* test skipping of initial hyphens and minus signs in automatic tags;Ingo Schwarze2020-03-215-5/+41
| | | | related to tags.c rev. 1.30
* Split tagging into a validation part including prioritizationIngo Schwarze2020-03-13102-83/+1331
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | in tag.{h,c} and {mdoc,man}_validate.c and into a formatting part including command line argument checking in term_tag.{h,c}, html.c, and {mdoc|man}_{term|html}.c. Immediate functional benefits include: * Improved prioritization of automatic tags for .Em and .Sy. * Avoiding bogus automatic tags when .Em, .Fn, or .Sy are explicitly tagged. * Explicit tagging of .Er and .Fl now works in HTML output. * Automatic tagging of .IP and .TP now works in HTML output. But mainly, this patch provides clean earth to build further improvements on. Technical changes: * Main program: Write a tag file for ASCII and UTF-8 output only. * All formatters: There is no more need to delay writing the tags. * mdoc(7)+man(7) formatters: No more need for elaborate syntax tree inspection. * HTML formatter: If available, use the "string" attribute as the tag. * HTML formatter: New function to write permalinks, to reduce code duplication. Style cleanup in the vicinity while here: * mdoc(7) terminal formatter: To set up bold font for children, defer to termp_bold_pre() rather than calling term_fontpush() manually. * mdoc(7) terminal formatter: Garbage collect some duplicate functions. * mdoc(7) HTML formatter: Unify <code> handling, delete redundant functions. * Where possible, use switch statements rather than if cascades. * Get rid of some more Yoda notation. The necessity for such changes was first discussed with kn@, but i didn't bother him with a request to review the resulting -673/+782 line patch.
* Fully support explicit tagging of .Sh and .Ss.Ingo Schwarze2020-02-275-3/+82
| | | | | | | | | | | | | | | | | | | | | | | | | This fixes the offset of two lines in terminal output and this improves HTML output by putting the id= attribute and <a> element into the respective <h1> or <h2> element rather than writing an additional <mark> element. To that end, introduce node flags NODE_ID (to make the node a link target, for example by writing an HTML id= attribute or by calling tag_put()) and NODE_HREF (to make the node a link source, used only in HTML output, used only to write an <a class="permalink"> element). In particular: * In the validator, generalize the concept of the "next node" such that it also works before .Sh and .Ss. * If the first argument of .Tg is empty, don't forget to complain if there are additional arguments, which will be ignored. * In the terminal formatter, support writing of explicit tags for all kinds of nodes, not just for .Tg. * In deroff(), allow nodes to have an explicit string representation even when they aren't text nodes. Use this for explicitly tagged section headers. Suprisingly, this is sufficient to make HTML output work, without explicit code changes in the HTML formatter. * In syntax tree output, display NODE_ID and NODE_HREF.
* Introduce the concept of nodes that are semantically transparent:Ingo Schwarze2020-02-2754-36/+834
| | | | | | | | | | | | | | they are skipped when looking for previous or following high-level macros. Examples include roff(7) .ft, .ll, and .ta, mdoc(7) .Sm and .Tg, and man(7) .DT and .PD. Use this concept for a variety of improved decisions in various validators and formatters. While here, * remove a few const qualifiers on struct arguments that caused trouble; * get rid of some more Yoda notation in the vicinity; * and apply some other stylistic improvements in the vicinity. I found this class of issues while considering .Tg patches from kn@.
* Fix this test after the recent Unicode update in OpenBSD base.Ingo Schwarze2020-02-271-1/+1
| | | | | | | | | | The test uses U+07FF NKO TAMAN SIGN because it is the highest code point having a two-byte UTF-8 representation. This character is a new single-width punctuation character in Unicode 11, such that mandoc now does correct horizontal spacing. We already used the code point for the test before it was assigned, which resulted in weird spacing because wcwidth(3) returns -1 for unassigned code points.
* Align to the new, sane behaviour of the groff_mdoc(7) .Dd macro:Ingo Schwarze2020-01-1920-30/+42
| | | | | | | | without an argument, use the empty string, and always concatenate all arguments, no matter their number. This allows reducing the number of arguments of mandoc_normdate() and some other simplifications, at the same time polishing some error messages by adding the name of the macro in question.
* test tbl_term.c rev. 1.73 and tbl_data.c rev. 1.53:Ingo Schwarze2020-01-116-11/+39
| | | | | incomplete short layout lines followed by longer lines, and spans at the beginning of layout lines
* Skip whitespace before tokens, too.Ingo Schwarze2020-01-084-3/+23
| | | | Bug found by bentley@ with input like "delim $$ delim off".
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