- dev-luatex - NTG Mailing Lists

return value of filter callbacks
by Manuel Pégourié-Gonnard 05 Nov '10

05 Nov '10

Hi, Sorry if this is very clear from the manual, maybe I just didn't read the part where it is explained (or I read it but was too stupid/tired to notice), but I don't understand the meaning of the return value of some callbacks. The first example (by order of apparition in the manual) is pre_linebreak_filter, whose calling convention is: function(<node> head, <string> groupcode) return true | false | <node> newhead end I think it's clear what returning a newhead node does, but I don't understand what returning true or false means for this callback. Other similar callbacks include post_linebreak_filter, (h|v)pack_filter, pre_output_filter, etc. The underlying problem is, I was trying to enhance the user documentation of luatexbase-mcb (which allows to register many functions in a single callback, based on some ConTeXt code I believe) but I can't make sense of the calling conventions in the current code (the functions are expected to return a node *and* true, in whatever order), so that I can't check it is correct, and even less document why it works that way. I guess understanding the calling convention for the callbacks themselves would be a good starting point. Thanks, Manuel.

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 02 Nov '10

02 Nov '10

------------------------------------------------------------------------ r3937 | hhenkel | 2010-11-01 22:58:54 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luascripts/pdflua.h M /trunk/source/texk/web2c/luatexdir/luascripts/txt2zlib.w zlib_struct type ------------------------------------------------------------------------ r3938 | hhenkel | 2010-11-01 23:20:47 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w M /trunk/source/texk/web2c/luatexdir/pdf/pdftypes.h hook to lua_State "Luap" ------------------------------------------------------------------------ r3939 | hhenkel | 2010-11-01 23:32:02 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.h M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w fix typecast warning with round_xn_over_d() ------------------------------------------------------------------------ r3940 | hhenkel | 2010-11-01 23:46:24 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.h M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w fix a few typecasts & make functions static ------------------------------------------------------------------------ r3941 | hhenkel | 2010-11-02 00:31:27 +0100 (Tue, 02 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/lpdflib.c yet another typecast ------------------------------------------------------------------------ r3942 | hhenkel | 2010-11-02 00:46:12 +0100 (Tue, 02 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w xtalloc() is a bit more handy than xmalloc() ------------------------------------------------------------------------ r3943 | taco | 2010-11-02 07:19:02 +0100 (Tue, 02 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luapeg/lpeg.c one-line lpeg fix from Roberto ------------------------------------------------------------------------ r3944 | taco | 2010-11-02 07:19:58 +0100 (Tue, 02 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/am/txt2zlib.am CPPFLAGS are needed for zlib includes ------------------------------------------------------------------------ r3945 | taco | 2010-11-02 07:20:15 +0100 (Tue, 02 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/Makefile.in M /trunk/source/texk/web2c/aclocal.m4 M /trunk/source/texk/web2c/configure M /trunk/source/texk/web2c/web2c/aclocal.m4 M /trunk/source/texk/web2c/web2c/configure autoreconf ------------------------------------------------------------------------ r3946 | taco | 2010-11-02 07:37:13 +0100 (Tue, 02 Nov 2010) | 5 lines Changed paths: M /trunk/source/texk/web2c/Makefile.in M /trunk/source/texk/web2c/aclocal.m4 M /trunk/source/texk/web2c/configure M /trunk/source/texk/web2c/configure.ac M /trunk/source/texk/web2c/doc/Makefile.in M /trunk/source/texk/web2c/lib/Makefile.in M /trunk/source/texk/web2c/luatexdir/am/libluatex.am M /trunk/source/texk/web2c/man/Makefile.in fix cross-compilation (but one has to manually copy the native build/texk/web2c/txt2zlib into the PATH before attemping cross-compilation) ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 01 Nov '10

01 Nov '10

------------------------------------------------------------------------ r3934 | hhenkel | 2010-11-01 18:12:03 +0100 (Mon, 01 Nov 2010) | 4 lines Changed paths: M /trunk/source/aclocal.m4 M /trunk/source/auxdir/auxsub/aclocal.m4 M /trunk/source/auxdir/auxsub/configure M /trunk/source/configure M /trunk/source/libs/aclocal.m4 M /trunk/source/libs/configure M /trunk/source/libs/libpng/aclocal.m4 M /trunk/source/libs/libpng/configure M /trunk/source/libs/obsdcompat/aclocal.m4 M /trunk/source/libs/obsdcompat/configure M /trunk/source/libs/poppler/aclocal.m4 M /trunk/source/libs/poppler/configure M /trunk/source/libs/zlib/aclocal.m4 M /trunk/source/libs/zlib/configure M /trunk/source/libs/zziplib/aclocal.m4 M /trunk/source/libs/zziplib/configure M /trunk/source/texk/aclocal.m4 M /trunk/source/texk/configure M /trunk/source/texk/kpathsea/aclocal.m4 M /trunk/source/texk/kpathsea/configure M /trunk/source/texk/web2c/Makefile.am M /trunk/source/texk/web2c/Makefile.in M /trunk/source/texk/web2c/aclocal.m4 M /trunk/source/texk/web2c/configure M /trunk/source/texk/web2c/luatexdir/am/libluatex.am A /trunk/source/texk/web2c/luatexdir/am/txt2zlib.am A /trunk/source/texk/web2c/luatexdir/luascripts A /trunk/source/texk/web2c/luatexdir/luascripts/pdflua.h A /trunk/source/texk/web2c/luatexdir/luascripts/pdflua.lua A /trunk/source/texk/web2c/luatexdir/luascripts/txt2zlib.w M /trunk/source/texk/web2c/luatexdir/ptexlib.h M /trunk/source/texk/web2c/web2c/aclocal.m4 M /trunk/source/texk/web2c/web2c/configure M /trunk/source/utils/aclocal.m4 M /trunk/source/utils/configure experimental stubs for luatex engine scripting: pdflua.lua & pdflua.h, new binary tool txt2zlib (txt2zlib.w, txt2zlib.am), fight with autoconf... running reautoconf on debian squeeze, using autoconf (GNU Autoconf) 2.67 ------------------------------------------------------------------------ r3935 | hhenkel | 2010-11-01 18:23:44 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: A /trunk/source/texk/web2c/luatexdir/pdf/pdfluaapi.h A /trunk/source/texk/web2c/luatexdir/pdf/pdfluaapi.w add also forgotten pdfluaapi.h, pdfluaapi.w ------------------------------------------------------------------------ r3936 | hhenkel | 2010-11-01 18:24:46 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/ptexlib.h ...and pdfluaapi.h also here ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 01 Nov '10

01 Nov '10

------------------------------------------------------------------------ r3933 | oneiros | 2010-11-01 15:34:55 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/lepdflib.cc expose some functions ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 01 Nov '10

01 Nov '10

------------------------------------------------------------------------ r3930 | oneiros | 2010-10-31 23:19:56 +0100 (Sun, 31 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/lepdflib.cc comment out unused functions ------------------------------------------------------------------------ r3931 | hhenkel | 2010-11-01 09:56:04 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/lepdflib.cc M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w a few lepdf functions, write_zip() cosmetics ------------------------------------------------------------------------ r3932 | hhenkel | 2010-11-01 10:50:59 +0100 (Mon, 01 Nov 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w M /trunk/source/texk/web2c/luatexdir/pdf/pdftypes.h make c_stream a pointer ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 29 Oct '10

29 Oct '10

------------------------------------------------------------------------ r3922 | hhenkel | 2010-10-28 23:58:28 +0200 (Thu, 28 Oct 2010) | 4 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.h M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w Clean up write_zip() a bit & make it static. N.B.: The comment "Go back to SVN 3908" in r3920 should read "Go back to SVN 3919". ------------------------------------------------------------------------ r3923 | hhenkel | 2010-10-29 00:28:12 +0200 (Fri, 29 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w one more assert() ------------------------------------------------------------------------ r3924 | hhenkel | 2010-10-29 01:14:06 +0200 (Fri, 29 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w cosmetics in pdf_out_block() ------------------------------------------------------------------------ r3925 | taco | 2010-10-29 10:52:35 +0200 (Fri, 29 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c remove out-of-range altuni's from the output ------------------------------------------------------------------------ r3926 | taco | 2010-10-29 11:08:27 +0200 (Fri, 29 Oct 2010) | 3 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c * don't dump the extra encodings, just the font enc is enough for our purposes * export the enconding's name to enc_name at one level up ------------------------------------------------------------------------ r3927 | taco | 2010-10-29 11:13:04 +0200 (Fri, 29 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c no point in exporting unset macstyle ------------------------------------------------------------------------ r3928 | taco | 2010-10-29 11:16:52 +0200 (Fri, 29 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c fix creationtime and modification time ------------------------------------------------------------------------ r3929 | taco | 2010-10-29 11:17:37 +0200 (Fri, 29 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c no need to dump zero uniqueid's either ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 28 Oct '10

28 Oct '10

------------------------------------------------------------------------ r3920 | hhenkel | 2010-10-28 00:54:25 +0200 (Thu, 28 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w M /trunk/source/texk/web2c/luatexdir/pdf/pdftypes.h experiment: don't seek in PDF file to write /Length ------------------------------------------------------------------------ r3921 | hhenkel | 2010-10-28 01:16:56 +0200 (Thu, 28 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.w M /trunk/source/texk/web2c/luatexdir/pdf/pdftypes.h ooops, doesn't work yet, sorry. Go back to SVN 3908. ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 24 Oct '10

24 Oct '10

------------------------------------------------------------------------ r3918 | taco | 2010-10-24 08:03:48 +0200 (Sun, 24 Oct 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex small typo ------------------------------------------------------------------------ r3919 | taco | 2010-10-24 09:09:11 +0200 (Sun, 24 Oct 2010) | 7 lines Changed paths: M /trunk/source/Makefile.in M /trunk/source/aclocal.m4 M /trunk/source/build-aux/config.guess M /trunk/source/build-aux/config.sub M /trunk/source/build-aux/depcomp M /trunk/source/build-aux/ltmain.sh M /trunk/source/build-aux/texinfo.tex M /trunk/source/configure M /trunk/source/libs/configure M /trunk/source/m4/kpse-common.m4 M /trunk/source/m4/kpse-pkgs.m4 M /trunk/source/m4/libtool.m4 M /trunk/source/m4/ltoptions.m4 M /trunk/source/m4/ltversion.m4 M /trunk/source/m4/lt~obsolete.m4 M /trunk/source/texk/configure M /trunk/source/texk/kpathsea/Makefile.in M /trunk/source/texk/kpathsea/aclocal.m4 M /trunk/source/texk/kpathsea/configure M /trunk/source/texk/kpathsea/doc/Makefile.in M /trunk/source/texk/kpathsea/man/Makefile.in M /trunk/source/texk/web2c/Makefile.am M /trunk/source/texk/web2c/Makefile.in M /trunk/source/texk/web2c/aclocal.m4 M /trunk/source/texk/web2c/configure M /trunk/source/texk/web2c/configure.ac M /trunk/source/texk/web2c/doc/Makefile.in M /trunk/source/texk/web2c/lib/Makefile.in M /trunk/source/texk/web2c/man/Makefile.in M /trunk/source/texk/web2c/web2c/Makefile.in M /trunk/source/texk/web2c/web2c/aclocal.m4 M /trunk/source/texk/web2c/web2c/configure M /trunk/source/utils/configure new m4 / build-aux files from texlive. Note that I had to disable ICU completely, because using it generated a broken texk/web2c/configure (perhaps the changes to the quoting broke --without-system-icu?) ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 23 Oct '10

23 Oct '10

------------------------------------------------------------------------ r3917 | taco | 2010-10-23 16:21:03 +0200 (Sat, 23 Oct 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex fix bad description for node.is_node (spotted by Philipp Gesang) ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 22 Oct '10

22 Oct '10

------------------------------------------------------------------------ r3916 | taco | 2010-10-22 16:27:12 +0200 (Fri, 22 Oct 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/mplibdir/mp.w M /trunk/source/texk/web2c/mplibdir/mpost.w M /trunk/source/texk/web2c/mplibdir/psout.w import mplib 1.503 ------------------------------------------------------------------------

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