libgfortran/io/format.h

   1 /* Copyright (C) 2009, 2010
   2    Free Software Foundation, Inc.
   3    Contributed by Janne Blomqvist
   4
   5 This file is part of the GNU Fortran runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef GFOR_FORMAT_H
  27 #define GFOR_FORMAT_H
  28
  29 #include "io.h"
  30
  31
  32 /* Format tokens.  Only about half of these can be stored in the
  33    format nodes.  */
  34
  35 typedef enum
  36 {
  37   FMT_NONE = 0, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
  38   FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_T, FMT_TR, FMT_TL,
  39   FMT_LPAREN, FMT_RPAREN, FMT_X, FMT_S, FMT_SS, FMT_SP, FMT_STRING,
  40   FMT_BADSTRING, FMT_P, FMT_I, FMT_B, FMT_BN, FMT_BZ, FMT_O, FMT_Z, FMT_F,
  41   FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END, FMT_DC,
  42   FMT_DP, FMT_STAR, FMT_RC, FMT_RD, FMT_RN, FMT_RP, FMT_RU, FMT_RZ
  43 }
  44 format_token;
  45
  46
  47 /* Format nodes.  A format string is converted into a tree of these
  48    structures, which is traversed as part of a data transfer statement.  */
  49
  50 struct fnode
  51 {
  52   format_token format;
  53   int repeat;
  54   struct fnode *next;
  55   char *source;
  56
  57   union
  58   {
  59     struct
  60     {
  61       int w, d, e;
  62     }
  63     real;
  64
  65     struct
  66     {
  67       int length;
  68       char *p;
  69     }
  70     string;
  71
  72     struct
  73     {
  74       int w, m;
  75     }
  76     integer;
  77
  78     int w;
  79     int k;
  80     int r;
  81     int n;
  82
  83     struct fnode *child;
  84   }
  85   u;
  86
  87   /* Members for traversing the tree during data transfer.  */
  88
  89   int count;
  90   struct fnode *current;
  91
  92 };
  93
  94
  95 /* A storage structures for format node data.  */
  96
  97 #define FARRAY_SIZE 64
  98
  99 typedef struct fnode_array
 100 {
 101   struct fnode_array *next;
 102   fnode array[FARRAY_SIZE];
 103 }
 104 fnode_array;
 105
 106
 107 typedef struct format_data
 108 {
 109   char *format_string, *string;
 110   const char *error;
 111   char error_element;
 112   format_token saved_token;
 113   int value, format_string_len, reversion_ok;
 114   fnode *avail;
 115   const fnode *saved_format;
 116   fnode_array *last;
 117   fnode_array array;
 118 }
 119 format_data;
 120
 121 extern void parse_format (st_parameter_dt *);
 122 internal_proto(parse_format);
 123
 124 extern const fnode *next_format (st_parameter_dt *);
 125 internal_proto(next_format);
 126
 127 extern void unget_format (st_parameter_dt *, const fnode *);
 128 internal_proto(unget_format);
 129
 130 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 131 internal_proto(format_error);
 132
 133 extern void free_format_data (struct format_data *);
 134 internal_proto(free_format_data);
 135
 136 extern void free_format_hash_table (gfc_unit *);
 137 internal_proto(free_format_hash_table);
 138
 139 extern void init_format_hash (st_parameter_dt *);
 140 internal_proto(init_format_hash);
 141
 142 extern void free_format_hash (st_parameter_dt *);
 143 internal_proto(free_format_hash);
 144
 145 #endif