1 /* conditional.h 2 3 Copyright 2009 Taco Hoekwater <taco@luatex.org> 4 5 This file is part of LuaTeX. 6 7 LuaTeX is free software; you can redistribute it and/or modify it under 8 the terms of the GNU General Public License as published by the Free 9 Software Foundation; either version 2 of the License, or (at your 10 option) any later version. 11 12 LuaTeX is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU General Public License along 18 with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */ 19 20 21 #ifndef CONDITIONAL_H 22 # define CONDITIONAL_H 23 24 25 # define unless_code 32 /* amount added for `\.{\\unless}' prefix */ 26 27 typedef enum { 28 if_char_code = 0, /* `\.{\\if}' */ 29 if_cat_code = 1, /* `\.{\\ifcat}' */ 30 if_int_code = 2, /* `\.{\\ifnum}' */ 31 if_dim_code = 3, /* `\.{\\ifdim}' */ 32 if_odd_code = 4, /* `\.{\\ifodd}' */ 33 if_vmode_code = 5, /* `\.{\\ifvmode}' */ 34 if_hmode_code = 6, /* `\.{\\ifhmode}' */ 35 if_mmode_code = 7, /* `\.{\\ifmmode}' */ 36 if_inner_code = 8, /* `\.{\\ifinner}' */ 37 if_void_code = 9, /* `\.{\\ifvoid}' */ 38 if_hbox_code = 10, /* `\.{\\ifhbox}' */ 39 if_vbox_code = 11, /* `\.{\\ifvbox}' */ 40 ifx_code = 12, /* `\.{\\ifx}' */ 41 if_eof_code = 13, /* `\.{\\ifeof}' */ 42 if_true_code = 14, /* `\.{\\iftrue}' */ 43 if_false_code = 15, /* `\.{\\iffalse}' */ 44 if_case_code = 16, /* `\.{\\ifcase}' */ 45 if_def_code = 17, /* `\.{\\ifdefined}' */ 46 if_cs_code = 18, /* `\.{\\ifcsname}' */ 47 if_font_char_code = 19, /* `\.{\\iffontchar}' */ 48 if_in_csname_code = 20, /* `\.{\\ifincsname}' */ 49 if_primitive_code = 21, /* `\.{\\ifprimitive}' */ 50 if_abs_num_code = 22, /* `\.{\\ifabsnum}' */ 51 if_abs_dim_code = 23, /* `\.{\\ifabsdim}' */ 52 } if_type_codes; 53 54 55 56 57 # define if_limit_subtype(A) subtype((A)+1) 58 # define if_limit_type(A) type((A)+1) 59 # define if_line_field(A) vlink((A)+1) 60 61 typedef enum { 62 if_code = 1, /* code for \.{\\if...} being evaluated */ 63 fi_code = 2, /* code for \.{\\fi} */ 64 else_code = 3, /* code for \.{\\else} */ 65 or_code = 4, /* code for \.{\\or} */ 66 } else_type_codes; 67 68 extern halfword cond_ptr; /* top of the condition stack */ 69 extern int if_limit; /* upper bound on |fi_or_else| codes */ 70 extern int cur_if; /* type of conditional being worked on */ 71 extern int if_line; /* line where that conditional began */ 72 extern int skip_line; /* skipping began here */ 73 74 extern void pass_text(void); 75 extern void push_condition_stack(void); 76 extern void pop_condition_stack(void); 77 extern void change_if_limit(int l, halfword p); 78 79 extern void conditional(void); 80 81 #endif 82