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// -*- C++ -*-
/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff 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, or (at your option) any later
version.
groff 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 General Public License
for more details.
You should have received a copy of the GNU General Public License along
with groff; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
struct charinfo;
struct node;
struct vunits;
class token {
symbol nm;
node *nd;
unsigned char c;
int val;
units dim;
enum token_type {
TOKEN_BACKSPACE,
TOKEN_BEGIN_TRAP,
TOKEN_CHAR, // a normal printing character
TOKEN_DUMMY,
TOKEN_EMPTY, // this is the initial value
TOKEN_END_TRAP,
TOKEN_ESCAPE, // \e
TOKEN_HYPHEN_INDICATOR,
TOKEN_INTERRUPT, // \c
TOKEN_ITALIC_CORRECTION, // \/
TOKEN_LEADER, // ^A
TOKEN_LEFT_BRACE,
TOKEN_MARK_INPUT, // \k -- `nm' is the name of the register
TOKEN_NEWLINE, // newline
TOKEN_NODE,
TOKEN_NUMBERED_CHAR,
TOKEN_PAGE_EJECTOR,
TOKEN_REQUEST,
TOKEN_RIGHT_BRACE,
TOKEN_SPACE, // ` ' -- ordinary space
TOKEN_SPECIAL, // a special character -- \' \` \- \(xx
TOKEN_SPREAD, // \p -- break and spread output line
TOKEN_TAB, // tab
TOKEN_TRANSPARENT, // \!
TOKEN_EOF // end of file
} type;
public:
token();
~token();
token(const token &);
void operator=(const token &);
void next();
void process();
void skip();
int eof();
int nspaces(); // 1 if space, 2 if double space, 0 otherwise
int space(); // is it a space or double space?
int white_space(); // is the current token space or tab?
int newline(); // is the current token a newline?
int tab(); // is the current token a tab?
int leader();
int backspace();
int delimiter(int warn = 0); // is it suitable for use as a delimiter?
int dummy();
int transparent();
int left_brace();
int right_brace();
int page_ejector();
int hyphen_indicator();
int operator==(const token &); // need this for delimiters, and for conditions
int operator!=(const token &); // ditto
unsigned char ch();
charinfo *get_char(int required = 0);
int add_to_node_list(node **);
int title();
void make_space();
void make_newline();
const char *description();
friend void process_input_stack();
};
extern token tok; // the current token
extern symbol get_name(int required = 0);
extern symbol get_long_name(int required = 0);
extern charinfo *get_optional_char();
extern void skip_line();
extern void handle_initial_title();
struct hunits;
extern void read_title_parts(node **part, hunits *part_width);
extern int get_number(units *result, unsigned char si);
extern int get_integer(int *result);
extern int get_number(units *result, unsigned char si, units prev_value);
extern int get_integer(int *result, int prev_value);
void interpolate_number_reg(symbol, int);
const char *asciify(int c);
inline int token::newline()
{
return type == TOKEN_NEWLINE;
}
inline int token::space()
{
return type == TOKEN_SPACE;
}
inline int token::nspaces()
{
if (type == TOKEN_SPACE)
return 1;
else
return 0;
}
inline int token::white_space()
{
return type == TOKEN_SPACE || type == TOKEN_TAB;
}
inline int token::transparent()
{
return type == TOKEN_TRANSPARENT;
}
inline int token::page_ejector()
{
return type == TOKEN_PAGE_EJECTOR;
}
inline unsigned char token::ch()
{
return type == TOKEN_CHAR ? c : 0;
}
inline int token::eof()
{
return type == TOKEN_EOF;
}
inline int token::dummy()
{
return type == TOKEN_DUMMY;
}
inline int token::left_brace()
{
return type == TOKEN_LEFT_BRACE;
}
inline int token::right_brace()
{
return type == TOKEN_RIGHT_BRACE;
}
inline int token::tab()
{
return type == TOKEN_TAB;
}
inline int token::leader()
{
return type == TOKEN_LEADER;
}
inline int token::backspace()
{
return type == TOKEN_BACKSPACE;
}
inline int token::hyphen_indicator()
{
return type == TOKEN_HYPHEN_INDICATOR;
}
int has_arg();
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