// -*- 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
extern "C" {
double hypot(double, double);
}
#include "assert.h"
#include "cset.h"
#include "lib.h"
#include "stringclass.h"
#include "errarg.h"
#include "error.h"
#include "position.h"
#include "text.h"
#include "output.h"
#ifndef M_SQRT2
#define M_SQRT2 1.41421356237309504880
#endif
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
class input {
input *next;
public:
input();
virtual ~input();
virtual int get() = 0;
virtual int peek() = 0;
virtual int get_location(const char **, int *);
friend class input_stack;
friend class copy_rest_thru_input;
};
class file_input : public input {
FILE *fp;
const char *filename;
int lineno;
string line;
const char *ptr;
int read_line();
public:
file_input(FILE *, const char *);
~file_input();
int get();
int peek();
int get_location(const char **, int *);
};
void lex_init(input *);
int get_location(char **, int *);
void do_copy(const char *file);
void parse_init();
void parse_cleanup();
void lex_error(const char *message,
const errarg &arg1 = empty_errarg,
const errarg &arg2 = empty_errarg,
const errarg &arg3 = empty_errarg);
void lex_warning(const char *message,
const errarg &arg1 = empty_errarg,
const errarg &arg2 = empty_errarg,
const errarg &arg3 = empty_errarg);
void lex_cleanup();
extern int flyback_flag;
extern int command_char;
// zero_length_line_flag is non-zero if zero-length lines are drawn
// as dots by the output device
extern int zero_length_line_flag;
extern int driver_extension_flag;
extern int compatible_flag;
extern int safer_flag;
