1*cec8643bSMichal Nowak /* $Id: eqn.h,v 1.1 2018/12/13 05:23:38 schwarze Exp $ */ 2*cec8643bSMichal Nowak /* 3*cec8643bSMichal Nowak * Copyright (c) 2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv> 4*cec8643bSMichal Nowak * 5*cec8643bSMichal Nowak * Permission to use, copy, modify, and distribute this software for any 6*cec8643bSMichal Nowak * purpose with or without fee is hereby granted, provided that the above 7*cec8643bSMichal Nowak * copyright notice and this permission notice appear in all copies. 8*cec8643bSMichal Nowak * 9*cec8643bSMichal Nowak * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES 10*cec8643bSMichal Nowak * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11*cec8643bSMichal Nowak * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR 12*cec8643bSMichal Nowak * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13*cec8643bSMichal Nowak * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14*cec8643bSMichal Nowak * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15*cec8643bSMichal Nowak * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16*cec8643bSMichal Nowak * 17*cec8643bSMichal Nowak * Public data types for eqn(7) syntax trees. 18*cec8643bSMichal Nowak */ 19*cec8643bSMichal Nowak 20*cec8643bSMichal Nowak enum eqn_boxt { 21*cec8643bSMichal Nowak EQN_TEXT, /* Text, e.g. number, variable, operator, ... */ 22*cec8643bSMichal Nowak EQN_SUBEXPR, /* Nested eqn(7) subexpression. */ 23*cec8643bSMichal Nowak EQN_LIST, /* List, for example in braces. */ 24*cec8643bSMichal Nowak EQN_PILE, /* Vertical pile. */ 25*cec8643bSMichal Nowak EQN_MATRIX /* List of columns. */ 26*cec8643bSMichal Nowak }; 27*cec8643bSMichal Nowak 28*cec8643bSMichal Nowak enum eqn_fontt { 29*cec8643bSMichal Nowak EQNFONT_NONE = 0, 30*cec8643bSMichal Nowak EQNFONT_ROMAN, 31*cec8643bSMichal Nowak EQNFONT_BOLD, 32*cec8643bSMichal Nowak EQNFONT_FAT, 33*cec8643bSMichal Nowak EQNFONT_ITALIC, 34*cec8643bSMichal Nowak EQNFONT__MAX 35*cec8643bSMichal Nowak }; 36*cec8643bSMichal Nowak 37*cec8643bSMichal Nowak enum eqn_post { 38*cec8643bSMichal Nowak EQNPOS_NONE = 0, 39*cec8643bSMichal Nowak EQNPOS_SUP, 40*cec8643bSMichal Nowak EQNPOS_SUBSUP, 41*cec8643bSMichal Nowak EQNPOS_SUB, 42*cec8643bSMichal Nowak EQNPOS_TO, 43*cec8643bSMichal Nowak EQNPOS_FROM, 44*cec8643bSMichal Nowak EQNPOS_FROMTO, 45*cec8643bSMichal Nowak EQNPOS_OVER, 46*cec8643bSMichal Nowak EQNPOS_SQRT, 47*cec8643bSMichal Nowak EQNPOS__MAX 48*cec8643bSMichal Nowak }; 49*cec8643bSMichal Nowak 50*cec8643bSMichal Nowak /* 51*cec8643bSMichal Nowak * A "box" is a parsed mathematical expression as defined by the eqn.7 52*cec8643bSMichal Nowak * grammar. 53*cec8643bSMichal Nowak */ 54*cec8643bSMichal Nowak struct eqn_box { 55*cec8643bSMichal Nowak struct eqn_box *parent; 56*cec8643bSMichal Nowak struct eqn_box *prev; 57*cec8643bSMichal Nowak struct eqn_box *next; 58*cec8643bSMichal Nowak struct eqn_box *first; /* First child node. */ 59*cec8643bSMichal Nowak struct eqn_box *last; /* Last child node. */ 60*cec8643bSMichal Nowak char *text; /* Text (or NULL). */ 61*cec8643bSMichal Nowak char *left; /* Left-hand fence. */ 62*cec8643bSMichal Nowak char *right; /* Right-hand fence. */ 63*cec8643bSMichal Nowak char *top; /* Symbol above. */ 64*cec8643bSMichal Nowak char *bottom; /* Symbol below. */ 65*cec8643bSMichal Nowak size_t expectargs; /* Maximal number of arguments. */ 66*cec8643bSMichal Nowak size_t args; /* Actual number of arguments. */ 67*cec8643bSMichal Nowak int size; /* Font size. */ 68*cec8643bSMichal Nowak #define EQN_DEFSIZE INT_MIN 69*cec8643bSMichal Nowak enum eqn_boxt type; /* Type of node. */ 70*cec8643bSMichal Nowak enum eqn_fontt font; /* Font in this box. */ 71*cec8643bSMichal Nowak enum eqn_post pos; /* Position of the next box. */ 72*cec8643bSMichal Nowak }; 73