/* align.h Copyright 2009 Taco Hoekwater This file is part of LuaTeX. LuaTeX is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. LuaTeX is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU General Public License along with LuaTeX; if not, see . */ #ifndef ALIGN_H # define ALIGN_H 1 /* We enter `\.{\\span}' into |eqtb| with |tab_mark| as its command code, and with |span_code| as the command modifier. This makes \TeX\ interpret it essentially the same as an alignment delimiter like `\.\&', yet it is recognizably different when we need to distinguish it from a normal delimiter. It also turns out to be useful to give a special |cr_code| to `\.{\\cr}', and an even larger |cr_cr_code| to `\.{\\crcr}'. The end of a template is represented by two ``frozen'' control sequences called \.{\\endtemplate}. The first has the command code |end_template|, which is |>outer_call|, so it will not easily disappear in the presence of errors. The |get_x_token| routine converts the first into the second, which has |endv| as its command code. */ # define tab_mark_cmd_code 1114113 /* {|biggest_char+2|} */ # define span_code 1114114 /* {|biggest_char+3|} */ # define cr_code (span_code+1) /* distinct from |span_code| and from any character */ # define cr_cr_code (cr_code+1) /* this distinguishes \.{\\crcr} from \.{\\cr} */ extern void init_align(void); extern void initialize_alignments(void); extern boolean fin_col(void); extern void fin_row(void); extern void align_peek(void); extern void insert_vj_template(void); #endif