libgfortran/io/format.h

   1 /* Copyright (C) 2009
   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 extern void parse_format (st_parameter_dt *);
  96 internal_proto(parse_format);
  97
  98 extern const fnode *next_format (st_parameter_dt *);
  99 internal_proto(next_format);
 100
 101 extern void unget_format (st_parameter_dt *, const fnode *);
 102 internal_proto(unget_format);
 103
 104 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 105 internal_proto(format_error);
 106
 107 extern void free_format_data (struct format_data *);
 108 internal_proto(free_format_data);
 109
 110 extern void free_format_hash_table (gfc_unit *);
 111 internal_proto(free_format_hash_table);
 112
 113 extern void init_format_hash (st_parameter_dt *);
 114 internal_proto(init_format_hash);
 115
 116 extern void free_format_hash (st_parameter_dt *);
 117 internal_proto(free_format_hash);
 118
 119 #endif