pic/pic.h

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 2, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file COPYING.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <math.h>
  24 #include <stdlib.h>
  25 #include <errno.h>
  26
  27 #include "assert.h"
  28 #include "cset.h"
  29 #include "lib.h"
  30 #include "stringclass.h"
  31 #include "errarg.h"
  32 #include "error.h"
  33 #include "position.h"
  34 #include "text.h"
  35 #include "output.h"
  36
  37 #ifndef M_SQRT2
  38 #define M_SQRT2 1.41421356237309504880
  39 #endif
  40
  41 class input {
  42   input *next;
  43 public:
  44   input();
  45   virtual ~input();
  46   virtual int get() = 0;
  47   virtual int peek() = 0;
  48   virtual int get_location(const char **, int *);
  49   friend class input_stack;
  50   friend class copy_rest_thru_input;
  51 };
  52
  53 class file_input : public input {
  54   FILE *fp;
  55   const char *filename;
  56   int lineno;
  57   string line;
  58   const char *ptr;
  59   int read_line();
  60 public:
  61   file_input(FILE *, const char *);
  62   ~file_input();
  63   int get();
  64   int peek();
  65   int get_location(const char **, int *);
  66 };
  67
  68 void lex_init(input *);
  69 int get_location(char **, int *);
  70
  71 void do_copy(const char *file);
  72 void parse_init();
  73 void parse_cleanup();
  74
  75 void lex_error(const char *message,
  76                const errarg &arg1 = empty_errarg,
  77                const errarg &arg2 = empty_errarg,
  78                const errarg &arg3 = empty_errarg);
  79
  80 void lex_warning(const char *message,
  81                  const errarg &arg1 = empty_errarg,
  82                  const errarg &arg2 = empty_errarg,
  83                  const errarg &arg3 = empty_errarg);
  84
  85 void lex_cleanup();
  86
  87 extern int flyback_flag;
  88 extern int command_char;
  89 // zero_length_line_flag is non-zero if zero-length lines are drawn
  90 // as dots by the output device
  91 extern int zero_length_line_flag;
  92 extern int driver_extension_flag;
  93 extern int compatible_flag;