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- // -*- C++ -*-
- /* Copyright (C) 1989, 1990, 1991 Free Software Foundation, Inc.
- Written by James Clark (jjc@jclark.uucp)
-
- 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 1, 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 LICENSE. If not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdio.h>
- #include <string.h>
- #include <math.h>
- #include <stdlib.h>
- #include <osfcn.h>
- #include <errno.h>
-
- #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
-
- 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;
-