sets the dn and dl registers to the size of the diversion named in the argument. Doesn't do anything when the named diversion doesn't exist. The name sg is temporary until we find a better one. July 21, 1993: Experiment: Macro space & registers name allocated dynamically. Note that current reallocation occurs in increments of 1, to force the code to be executed a lot; a kind of stress testing. Also, eight bit characters allowed in macro/string names. July 21, 1993: Turn on the escape mode if the end macro is called. July 20, 1993: Tracing mode now default off Don't print s stackdump either when a file specfied on the command line argument cannot be opened July 15, 1993: Don't print useless line & current file informations when a file specfied on the command line argument cannot be opened. Sun ansi compiler doesn't default adhere to standards. Undid the kludge in tdef.h July 14, 1993: Coding error made the tab type R not function properly July 12, 1993: Fixed a typo in the version stuff, noticed by Rich July 9, 1993: Added the dwb home configuration stuff, thanks RIch. Also, NCHARS is big enough. Added a fflush to casetm, so .fm will be up to date. June 25, 1993 (Rich): -t option reinstated for the sake of compatibility. Some old shells scripts and man(1) from SunOs want this, sigh Compiler and system dependencies Some systems pull in sys/types.h via #include and then the compiler complains about two ushort typedefs. Therefore, ushort is now Ushort (and uchar Uchar). The SVID specifies a strdup, POSIX doesn't, anyway, troff provides its own version, slightly different then the standard one. A To prevent name clashes with that definion, renamed to strdupl. June 24, 1993 (Rich): -V option added for DWB3.4 (rich) May 18, 1993: Trivial fix (.cf) request for troff -a issuing .cf /dev/null with troff -a gives some spurious output: H720 H720 s10 f1 fixed by checking for ascii mode it ptesc(), ptps() and ptfont() in t10.c Enhancement Added a .tm request to roff. Works just like .tm, but now it will do it to file. The name is coined by Carmela. Great for creating indeces & toc's (we hope). May 18 1993: Compatibilty change Somebody complained that his favorite macro didn't work: it had a BELL (^G) in the name. This was a non-documented feature of earlier versions of troff (although the documentation actually doesn't say that you can. (They can only be used for delimiters or with the tr request), so it isn't that important). But the sake of eternal backward compatibilaty I allowed some control characters like, STX, ACK, etc. also be part of a macro/string name. While at it, I made it also possible to have eight bit characters be part of the name. It might be that this screws up the way users think about these things. For UNICODE versions, they probably want to do that as well, and that won't work as easy, (because these characters are 16-bits wide), so it is dubious whether we actually want this. BTW. Now .de \(ts\ts .tm terminal sigma macro .. .\(ts\(ts also works, as long the internal cookie for ts isn't more then eight bits. May 12, 1993: Syntax change Some requests accept tabs as a separator, some don't and this can be a nuisance. Now a tab is also recognized as an argument separator for requests, this makes .so /dev/null works. To be more precise, any motion character is allowed, so .so\h'5i'/dev/null will work as well, if one really wants that. It will be a problem for users who really relied on this as in .ds x string and expect the tab to become part of the string a, but I haven't seen any use of that (obscure trick). May 6, 1993: Eileen count fixed Troff sometimes went in a loop, and exited with: ``job looping; check abuse of macros'' (also known as the Eileen's loop). It can be forced with the next trivial programme: .de ff .di xx .. .wh -1 ff .bp Basically what happens is that a page transition now will happen in a diversion, which doesn't make sense. Wat really happens is that eject() (in n7.c) doesn't eject the frame because we are in a diversion. This cause the loop in n1.c (because now always stack->pname <= ejl). Adding check on whether we are not in a diversion takes care of the problem. March 30, 1993: Need request, .ne When there is a begin of page trap set, and the first thing in the file is a .ne request, the trap gets fired, but, the x font R etc. cookies doen't come out, because the troff thinks that the first page pseudo transition already took place. Fixed by forcing the start of the first page in the casene request with the same code as in casetl (which caused a similar problem quite some time ago). Change to .cf request ``Here document'' If the argument of .cf starts with a <<, the rest of it is taken as an EOF token. It will reat the rest of the input until it hits the EOF token and copies it to the output. This is similar as the shell's ``here document'' mechanisme and put in place to improve the kludgy way picasso, picpack etc. now include postscript. Using troff -TLatin1 (DWB version) and \N'...' caused core dump In t11, in chadd, it should test on NCHARS - ALPHABET to see whether we run out of table space (and we probably should beaf up NCHARS for the DWB version). March 16, 1993: Diversion rename bug fix It is possible to get troff in an infinite loop by renaming a diversion in progress, and calling it later with the new name (as in .di xx, .rn xx yy, .yy). The effect depends on whether troff already put stuff in the diversion or not. Fix by having .rn also rename the current diversion (if there is any and when appropriate). If the diversion calls itself by the new name and given the fix made on 11 nov 1992, this will now result in an error. (BTW, the fix from 11 nov is improved: diversions nest, so we have to account for that). December 18, 1992: Some people have complete novels as comments, so we need to skip comments while checking the legality of font files. thaks Rixh December 16, 1992 Some people rely on the order that -r arguments are given, so that troff -rC1 -rC3 ends up setting register C to 3. Because cpushback() pushes things in a LIFO order back, we have to do the same to get -r args in a FIFO order. Nov 17, 1992: Giving a -rL8 option cuased the string .nr L 8 to be printed on the output, using the wonderful 3b2. Some garbage was left in buf[100] in main(). Fixed by setting buf[0] explicitly to 0 (because some C-compilers complain about ``no automatic aggregate initialization''). Nov 11, 1992: Diversion bug fix If a diversion was being read and the input is faulty so the diversion was reading in itself, it caused troff to loop undefinitely. This was easily fixed by a test in control(a,b) in n1.c. Something similar things might happen with macros causing the ``eileenct problem'', but I didn't look for that. We have to wait until it happens. Oct 26, 1992: Numeric arguments: Illegal argments are treated as missing arguments. This changed the semantics of .ll, .ls, .in, .lg, .ul, .cu .lt (which acted as if the argument was 0) and .ps which was simply ignored with an illegal argument. Tidied up number parsing in atoi1(). This prevents arguments like .x or 1.2.3.4 being interpret as a legal number (nonumb = 0) Numeric arguments error reporting: Controlled by .pt, illegal numbers are now reported (default trace mode is 1). This is also true for the escapes: \h'..', \v'..' \H'..', \S'..', \N'..', \D'..', \l'.., \L'.. and \x'..'. \D'c' is the only drawing request which doesn't take a pair of numbers as arguments, so a special case is put here in setdraw() (This code actually could use an overhaul to get better parsing. As long as the \D'..' cookies are machine generated it is low on the priority list). Don't generate an error if the illegal argument to a request is a \}. It is too painful to do right (although it can be done, but it would clutter getch() and getcho() even more). Input line numbers (.c register) bug fixes: In not taken branches of .if or .ie, the input line # (numtab[CD].val) should be raised when necessary (in eatblk()). For concealed newlines, we still should count the line for input. Setfield (n9.c) sometimes pushes the rest of the line back to the input (including \n), without adjusting numtab[CD].val Because .c (and so numtab[CD].val) is the number of lines read and the error might actually happen in the current line (before seeing the '\n), we need to apply correction in errprint when nlflg set. (This correction needs to be undone when inside a macro because the nlflg is set by reading the args to the macro). Line number setting (.lf) request bug fixes: I interpret that the .c register will contain the number of read lines, not including the current one. Also, don't change the input line number when the first argument of .lf is not a number. As a net effect, the next input .EQ .EN .ab will generate the same output whether eqn has been used or not. If request bug fix: A ``.if page .tm foo'' caused the next line being ignored; This bcause when the 2nd delimiter of a string couldn't be found in cmpstr, the next line was always eaten. Solution: in caseif1, if the condition is false, we should check nlflg before eating a block. (Note: We might have eaten \{\ as well. We could disallow the \{\ in a string to be compared to prevent that but that might break other things). Enhancement to .pt: The .pt now pops the previous values when no argument is specified. Turned out to be handy when chasing for problems. Just ``bracked'' the code with .pt 7 and .pt and you get a trace of only that block. The meaning of the arguments is now: 01 trace numeric arguments (default on) 02 trace requests 04 trace macros Abort request (.ab) beautification: Don't print the extra carriage return when .ab is called without an argument. Oct 12, 1992: (Comments & spelling errors from this day on by jaap) replaced 32767 by INT_MAX in several places to allow for very long pages (on 32-but machines). The ``.fp 1 R \"COMMENT'' complains about ``./troff: Can't open font file /usr/lib/font/devpost/h'' on some systems. It sees the tab as part of the optional font file. Apparently it is system dependent whether isgraph() includes the tab character. Fixed by using getach() in getname() in n1.c instead. Aug 28, 1992: removed call to popi from rdtty(); it was eating up the rest of the macro if it was used from within one. (thanks, jaap) Jul 21, 1992: added extra test in nextfile() to pop current input file only if not in .nx command. thanks to jaap. added test in getword() to avoid hyphenating after \z character, which prevents any hyphenation inside \X'...'. thanks to jaap. added, then removed, code in getword() to prevent hyphenating anything shorter than 6 characters. looks like it changed a lot more than i thought. Jul 12, 1992: added .pt request to trace macros and requests (from jaap). .pt N Print trace of macros (N=1), requests (N=2) or both (N=3) Jun 5, 1992: added tests to t.twrest and t.twinit to avoid 0 deref in n2 and n10, for nroff -t xxxxx. thanks to Rich Drechsler. May 22, 1992: added extern decls to e.g., void Tchar (*hmot)(void) in tdef.h and added definition to ni.c, so pointers are defined explicitly. makes it work on turbo c++ and probably others. changed a couple of isdigit's and isgraph(getch()) to avoid multiple evaluation (even though it shouldn't happen). Made /usr/bin/nroff a shell script. May 12, 1992: n1.c: need p++ after strrchr to skip / in program name. thanks to Rich Drechsler. Apr 17, 1992: casefi(), n5.c: .u register should be 0 or 1, not incremented with each .fi. Apr 5, 1992: fiddled n7.c and added _nmwid to the environment, to add a 5th argument to .nm: the maximum number of digits in any line number. default is 3, which was previously hardwired in. added jaap's code for yet another register which actually delivers a string, called .S (so it can easily go in the switch in setn() in n4.c); it delivers the current tabstop and alignment modes in a format suitable for a subsequent .ta \n(.S command: .ds T \n(.S ... .ta \*T Mar 30, 1992: added test in getword to avoid hyphenating things with motions (and avoid a core dump sometimes too). Mar 13, 1992: \n(sb initialized wrong in setwd(). TYPESETTER=foo troff -Tpost used foo instead of post. Mar 12, 1992: rearranged tests in popf so that .so is closed properly before moving on to the next macro package. Mar 1, 1992: input mechanism rearranged to use getc() instead of stack of explicit input buffers. 5-10% slowdown. Jan 28, 1992: fixed .tm \(mi to print something sensible. thanks to jaap. Jan 2, 1992: fiddle setfp so doesn't put out font stuff if -a turned on. Dec 17, 1991: copy 3rd argument in .fp commands to x font ... lines when it contains a /, for testing fonts locally. Dec 13, 1991: parameterize the font directories, etc., so can be set in makefiles. added -N argument to run as nroff. Nov 8, 1991: add a maplow(towlower...) in n8.c to handle brain-damaged libraries. Nov 2, 1991: merged nroff into troff, based on Ken's plan 9 version. merged nii.c into ni.c, removed tw.h, etc. more work needed to make this stuff cleaner. July 27, 1991: added test in setn in n4 to fix bug that permitted things like \n (ab to work "properly". thanks to jaap for finding and fixing. added paranoid testing in t11 to make sure font files look ok. May 13, 1991: moved evaluation of \(xx from copy mode to non-copy mode, so that weird character names wouldn't get reevaluated in argument parsing. installed july 27. May 6, 1991: increased size of hyphenation exception buffer to 512 from 128 Apr 14, 1991: added an extra redundant call of ptfont in setfp, since it appears that some versions of adobe transcript assume that an "x font" command means to change the actual font as well. the fix preserves the current font. thanks to david brailsford and friends for spotting the problem. fixed up tests in alpha() in n8 to defend isalpha() against too-big inputs. punct() argument had wrong type too. thanks to rich drexler and peter nelson. Mar 19, 1991: fixed bug that prevented .rd from working with new corebuf organization. fixed bug that caused .ig inside diversions to give bad storage allocation. thanks to arthur david olson, whose fix was on netnews 3 years earlier. Mar 5, 1991: huge table sizes for kanji. Feb ??, 1991: working on dealing with large alphabets, notably kanji. added "defaultwidth" to font descriptions, for characters not given an explicit width. Jan, 1991: added tex hyphenation, using standard tex data files, but not the elaborate compressed trie, which is a lot of trouble to save maybe 40k bytes. this appears to run at exactly the same speed as before. so far this stuff reads into a fixed size array; that should change. it should also be possible to deal with multiple languages. the command .ha sets the algorithm. .ha 1 => tex, with troff rules if tex doesn't hyphenate; .ha 0 gives troff rules, and .ha resets to the default, which is tex. the hyphenation algorithm is part of the environment, a nod to a future in which i handle more than one language. replaced the fixed size corebuf array for string/macro storage by a dynamic structure that can grow. this appears to slow things down by maybe 3%. the code is about the same complexity. Dec 27, 1990: converted to ansi c, based on some work by ken thompson, but not as thoroughly as he did. there is a shell script unansi and an awk program cvt that will help you step back in time if you do not have an ansi c compiler. moved the special-name characters up to 256 instead of 128, although done in terms of ALPHABET, so one can pass 8 bit characters through. removed lots of 0177's and similar numbers. input is now not filtered, and if a character with the 8th bit on comes in, it will go out again. fixed t11.c to read character names in hex or octal as well as single-character ascii. unknown characters are now carried through with width = spacewidth. needs a way to set widths. removed all signal handling from troff. you signal, you die. added -d option to print version number. Dec 7, 1990: .fp 3 V VERYLONGNAME used to truncate the name to 10 chars; fixed. increased the limit on FBUFSZ for tables with very long fields. changed atoi1() to use double to avoid intermediate overflow. moved filenames like /usr/lib/font into tdef.h for easy change. removed some dreggish definitions. cleaned up non-portable error printing stuff; fixed up some messages. Dec 12, 1989: Removed the .! command, an undocumented synonym for .sy. Dec 4, 1989: Another wart to the \X code, to try to preserve blanks in all situations. Nov 17, 1989: A number of small changes preparatory to getting rid of nroff. The argument -Tnroff or -Tnroff-12 changes some internal values so that the predicate .if n is true and certain arithmetic operations are done as if nroff. This design is not yet final. Nov 7, 1989: Fixed hyphenation for nov-ice, ad-vice, de-vice, ser-vice, *-vice. Oct 11, 1989: It is now permitted to do an explicit change to font S. It is not clear what will break (though nothing seems to have). Oct 10, 1989: Modified flush code to always put out \nH instead of sometimes h. This makes it easier to parse the output for positioning. Sep 9, 1989: Fixed internal representation of \D'~...' so that it is immune to .tr ~ and variations. No external change. Aug 9, 1989: Changed .tm so it outputs \e, \%, \-, \&, \(blank). This might break indexing code. Only in the new version, as are all subsequent fixes. July, 1989: A major internal change: font information is read in ascii instead of the weird binary format of makedev (which is now dead). character names need not all appear in DESC; new names that appear when a font is used become part of the set of known names. There are some flaky bits here (it's conceivable that some \N number will collide with a real name), and it's probably 10-15% slower. Tant pis. As a by-product, nroff no longer compiles. I'll probably get back to this, but an alternative is to bag it once and for all. May 25, 1989: Another bug in \l, this time when width is 0. Not installed, since it's in the new font version. Apr 23, 1989: Fixed bug in n9 that caused core dump with unterminated \l command, like \l'1.5i ptflush no longer called when -a is on. Apr 12, 1989: fixed bug in n2 that failed to suppress printing of \! output when a -o was in effect. Apr 5, 1989: .fl and \X now cause output of size, font, hpos and vpos. this is necesary for postprocessors that intend to insert independent material, such as postscript. Feb 1, 1989: wait for .pi pipe to empty before exiting Oct 2, 1988: default is now -Tpost Sep 19, 1988: added abortive code to handle built-up characters by passing something through as \D'b...'. never used. Jul 4, 1988: replaced the sbrk nonsense in n3.c by calls to malloc. \N now tests against proper font size. installed Jaap Akkerhuis's code (mutatis mutandis) for permitting up to 99 fonts, swapping them into font pos 0 as needed. fixes the long-standing problem of having multiple font changes on a single output line. Jul 2, 1988: \X now preserves spaces even when contents are diverted. \N code safer -- NTRTAB and NWIDCACHE enlarged. Jul 14, 1987: Fixed obscure bug causing incorrect indentation of .mc output.