1*7295610fSBaptiste Daroussin /* $Id: eqn.h,v 1.1 2018/12/13 05:23:38 schwarze Exp $ */ 2*7295610fSBaptiste Daroussin /* 3*7295610fSBaptiste Daroussin * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv> 4*7295610fSBaptiste Daroussin * 5*7295610fSBaptiste Daroussin * Permission to use, copy, modify, and distribute this software for any 6*7295610fSBaptiste Daroussin * purpose with or without fee is hereby granted, provided that the above 7*7295610fSBaptiste Daroussin * copyright notice and this permission notice appear in all copies. 8*7295610fSBaptiste Daroussin * 9*7295610fSBaptiste Daroussin * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES 10*7295610fSBaptiste Daroussin * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11*7295610fSBaptiste Daroussin * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR 12*7295610fSBaptiste Daroussin * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13*7295610fSBaptiste Daroussin * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14*7295610fSBaptiste Daroussin * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15*7295610fSBaptiste Daroussin * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16*7295610fSBaptiste Daroussin * 17*7295610fSBaptiste Daroussin * Public data types for eqn(7) syntax trees. 18*7295610fSBaptiste Daroussin */ 19*7295610fSBaptiste Daroussin 20*7295610fSBaptiste Daroussin enum eqn_boxt { 21*7295610fSBaptiste Daroussin EQN_TEXT, /* Text, e.g. number, variable, operator, ... */ 22*7295610fSBaptiste Daroussin EQN_SUBEXPR, /* Nested eqn(7) subexpression. */ 23*7295610fSBaptiste Daroussin EQN_LIST, /* List, for example in braces. */ 24*7295610fSBaptiste Daroussin EQN_PILE, /* Vertical pile. */ 25*7295610fSBaptiste Daroussin EQN_MATRIX /* List of columns. */ 26*7295610fSBaptiste Daroussin }; 27*7295610fSBaptiste Daroussin 28*7295610fSBaptiste Daroussin enum eqn_fontt { 29*7295610fSBaptiste Daroussin EQNFONT_NONE = 0, 30*7295610fSBaptiste Daroussin EQNFONT_ROMAN, 31*7295610fSBaptiste Daroussin EQNFONT_BOLD, 32*7295610fSBaptiste Daroussin EQNFONT_FAT, 33*7295610fSBaptiste Daroussin EQNFONT_ITALIC, 34*7295610fSBaptiste Daroussin EQNFONT__MAX 35*7295610fSBaptiste Daroussin }; 36*7295610fSBaptiste Daroussin 37*7295610fSBaptiste Daroussin enum eqn_post { 38*7295610fSBaptiste Daroussin EQNPOS_NONE = 0, 39*7295610fSBaptiste Daroussin EQNPOS_SUP, 40*7295610fSBaptiste Daroussin EQNPOS_SUBSUP, 41*7295610fSBaptiste Daroussin EQNPOS_SUB, 42*7295610fSBaptiste Daroussin EQNPOS_TO, 43*7295610fSBaptiste Daroussin EQNPOS_FROM, 44*7295610fSBaptiste Daroussin EQNPOS_FROMTO, 45*7295610fSBaptiste Daroussin EQNPOS_OVER, 46*7295610fSBaptiste Daroussin EQNPOS_SQRT, 47*7295610fSBaptiste Daroussin EQNPOS__MAX 48*7295610fSBaptiste Daroussin }; 49*7295610fSBaptiste Daroussin 50*7295610fSBaptiste Daroussin /* 51*7295610fSBaptiste Daroussin * A "box" is a parsed mathematical expression as defined by the eqn.7 52*7295610fSBaptiste Daroussin * grammar. 53*7295610fSBaptiste Daroussin */ 54*7295610fSBaptiste Daroussin struct eqn_box { 55*7295610fSBaptiste Daroussin struct eqn_box *parent; 56*7295610fSBaptiste Daroussin struct eqn_box *prev; 57*7295610fSBaptiste Daroussin struct eqn_box *next; 58*7295610fSBaptiste Daroussin struct eqn_box *first; /* First child node. */ 59*7295610fSBaptiste Daroussin struct eqn_box *last; /* Last child node. */ 60*7295610fSBaptiste Daroussin char *text; /* Text (or NULL). */ 61*7295610fSBaptiste Daroussin char *left; /* Left-hand fence. */ 62*7295610fSBaptiste Daroussin char *right; /* Right-hand fence. */ 63*7295610fSBaptiste Daroussin char *top; /* Symbol above. */ 64*7295610fSBaptiste Daroussin char *bottom; /* Symbol below. */ 65*7295610fSBaptiste Daroussin size_t expectargs; /* Maximal number of arguments. */ 66*7295610fSBaptiste Daroussin size_t args; /* Actual number of arguments. */ 67*7295610fSBaptiste Daroussin int size; /* Font size. */ 68*7295610fSBaptiste Daroussin #define EQN_DEFSIZE INT_MIN 69*7295610fSBaptiste Daroussin enum eqn_boxt type; /* Type of node. */ 70*7295610fSBaptiste Daroussin enum eqn_fontt font; /* Font in this box. */ 71*7295610fSBaptiste Daroussin enum eqn_post pos; /* Position of the next box. */ 72*7295610fSBaptiste Daroussin }; 73