196 lines
4.4 KiB
C++
196 lines
4.4 KiB
C++
// -*- C++ -*-
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/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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struct charinfo;
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struct node;
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struct vunits;
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class token {
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symbol nm;
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node *nd;
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unsigned char c;
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int val;
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units dim;
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enum token_type {
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TOKEN_BACKSPACE,
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TOKEN_BEGIN_TRAP,
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TOKEN_CHAR, // a normal printing character
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TOKEN_DUMMY,
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TOKEN_EMPTY, // this is the initial value
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TOKEN_END_TRAP,
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TOKEN_ESCAPE, // \e
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TOKEN_HYPHEN_INDICATOR,
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TOKEN_INTERRUPT, // \c
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TOKEN_ITALIC_CORRECTION, // \/
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TOKEN_LEADER, // ^A
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TOKEN_LEFT_BRACE,
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TOKEN_MARK_INPUT, // \k -- `nm' is the name of the register
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TOKEN_NEWLINE, // newline
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TOKEN_NODE,
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TOKEN_NUMBERED_CHAR,
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TOKEN_PAGE_EJECTOR,
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TOKEN_REQUEST,
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TOKEN_RIGHT_BRACE,
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TOKEN_SPACE, // ` ' -- ordinary space
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TOKEN_SPECIAL, // a special character -- \' \` \- \(xx
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TOKEN_SPREAD, // \p -- break and spread output line
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TOKEN_TAB, // tab
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TOKEN_TRANSPARENT, // \!
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TOKEN_EOF // end of file
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} type;
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public:
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token();
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~token();
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token(const token &);
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void operator=(const token &);
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void next();
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void process();
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void skip();
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int eof();
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int nspaces(); // 1 if space, 2 if double space, 0 otherwise
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int space(); // is it a space or double space?
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int white_space(); // is the current token space or tab?
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int newline(); // is the current token a newline?
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int tab(); // is the current token a tab?
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int leader();
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int backspace();
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int delimiter(int warn = 0); // is it suitable for use as a delimiter?
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int dummy();
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int transparent();
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int left_brace();
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int right_brace();
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int page_ejector();
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int hyphen_indicator();
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int operator==(const token &); // need this for delimiters, and for conditions
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int operator!=(const token &); // ditto
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unsigned char ch();
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charinfo *get_char(int required = 0);
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int add_to_node_list(node **);
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int title();
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void make_space();
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void make_newline();
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const char *description();
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friend void process_input_stack();
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};
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extern token tok; // the current token
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extern symbol get_name(int required = 0);
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extern symbol get_long_name(int required = 0);
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extern charinfo *get_optional_char();
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extern void check_missing_character();
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extern void skip_line();
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extern void handle_initial_title();
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struct hunits;
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extern void read_title_parts(node **part, hunits *part_width);
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extern int get_number(units *result, unsigned char si);
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extern int get_integer(int *result);
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extern int get_number(units *result, unsigned char si, units prev_value);
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extern int get_integer(int *result, int prev_value);
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void interpolate_number_reg(symbol, int);
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const char *asciify(int c);
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inline int token::newline()
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{
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return type == TOKEN_NEWLINE;
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}
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inline int token::space()
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{
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return type == TOKEN_SPACE;
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}
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inline int token::nspaces()
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{
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if (type == TOKEN_SPACE)
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return 1;
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else
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return 0;
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}
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inline int token::white_space()
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{
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return type == TOKEN_SPACE || type == TOKEN_TAB;
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}
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inline int token::transparent()
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{
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return type == TOKEN_TRANSPARENT;
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}
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inline int token::page_ejector()
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{
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return type == TOKEN_PAGE_EJECTOR;
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}
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inline unsigned char token::ch()
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{
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return type == TOKEN_CHAR ? c : 0;
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}
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inline int token::eof()
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{
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return type == TOKEN_EOF;
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}
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inline int token::dummy()
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{
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return type == TOKEN_DUMMY;
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}
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inline int token::left_brace()
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{
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return type == TOKEN_LEFT_BRACE;
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}
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inline int token::right_brace()
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{
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return type == TOKEN_RIGHT_BRACE;
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}
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inline int token::tab()
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{
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return type == TOKEN_TAB;
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}
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inline int token::leader()
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{
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return type == TOKEN_LEADER;
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}
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inline int token::backspace()
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{
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return type == TOKEN_BACKSPACE;
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}
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inline int token::hyphen_indicator()
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{
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return type == TOKEN_HYPHEN_INDICATOR;
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}
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int has_arg();
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