libgfortran/io/format.h

   1 /* Copyright (C) 2009-2021 Free Software Foundation, Inc.
   2    Contributed by Janne Blomqvist
   3
   4 This file is part of the GNU Fortran runtime library (libgfortran).
   5
   6 Libgfortran is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 Libgfortran is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #ifndef GFOR_FORMAT_H
  26 #define GFOR_FORMAT_H
  27
  28 #include "io.h"
  29
  30 /* Format nodes.  A format string is converted into a tree of these
  31    structures, which is traversed as part of a data transfer statement.  */
  32
  33 struct fnode
  34 {
  35   format_token format;
  36   int repeat;
  37   struct fnode *next;
  38   char *source;
  39
  40   union
  41   {
  42     struct
  43     {
  44       int w, d, e;
  45     }
  46     real;
  47
  48     struct
  49     {
  50       int length;
  51       char *p;
  52     }
  53     string;
  54
  55     struct
  56     {
  57       int w, m;
  58     }
  59     integer;
  60
  61     struct
  62     {
  63       char *string;
  64       int string_len;
  65       gfc_full_array_i4 *vlist;
  66     }
  67     udf;  /* User Defined Format.  */
  68
  69     int w;
  70     int k;
  71     int r;
  72     int n;
  73
  74     struct fnode *child;
  75   }
  76   u;
  77
  78   /* Members for traversing the tree during data transfer.  */
  79
  80   int count;
  81   struct fnode *current;
  82
  83 };
  84
  85
  86 /* A storage structures for format node data.  */
  87
  88 #define FARRAY_SIZE 64
  89
  90 typedef struct fnode_array
  91 {
  92   struct fnode_array *next;
  93   fnode array[FARRAY_SIZE];
  94 }
  95 fnode_array;
  96
  97
  98 typedef struct format_data
  99 {
 100   char *format_string, *string;
 101   const char *error;
 102   char error_element;
 103   format_token saved_token;
 104   int value, format_string_len, reversion_ok;
 105   fnode *avail;
 106   const fnode *saved_format;
 107   fnode_array *last;
 108   fnode_array array;
 109 }
 110 format_data;
 111
 112 extern void parse_format (st_parameter_dt *);
 113 internal_proto(parse_format);
 114
 115 extern const fnode *next_format (st_parameter_dt *);
 116 internal_proto(next_format);
 117
 118 extern void unget_format (st_parameter_dt *, const fnode *);
 119 internal_proto(unget_format);
 120
 121 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 122 internal_proto(format_error);
 123
 124 extern void free_format_data (struct format_data *);
 125 internal_proto(free_format_data);
 126
 127 extern void free_format (st_parameter_dt *);
 128 internal_proto(free_format);
 129
 130 extern void free_format_hash_table (gfc_unit *);
 131 internal_proto(free_format_hash_table);
 132
 133 extern void init_format_hash (st_parameter_dt *);
 134 internal_proto(init_format_hash);
 135
 136 extern void free_format_hash (st_parameter_dt *);
 137 internal_proto(free_format_hash);
 138
 139 #endif