libgfortran/io/format.h

   1 /* Copyright (C) 2009-2013 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
  31 /* Format tokens.  Only about half of these can be stored in the
  32    format nodes.  */
  33
  34 typedef enum
  35 {
  36   FMT_NONE = 0, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
  37   FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_T, FMT_TR, FMT_TL,
  38   FMT_LPAREN, FMT_RPAREN, FMT_X, FMT_S, FMT_SS, FMT_SP, FMT_STRING,
  39   FMT_BADSTRING, FMT_P, FMT_I, FMT_B, FMT_BN, FMT_BZ, FMT_O, FMT_Z, FMT_F,
  40   FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END, FMT_DC,
  41   FMT_DP, FMT_STAR, FMT_RC, FMT_RD, FMT_RN, FMT_RP, FMT_RU, FMT_RZ
  42 }
  43 format_token;
  44
  45
  46 /* Format nodes.  A format string is converted into a tree of these
  47    structures, which is traversed as part of a data transfer statement.  */
  48
  49 struct fnode
  50 {
  51   format_token format;
  52   int repeat;
  53   struct fnode *next;
  54   char *source;
  55
  56   union
  57   {
  58     struct
  59     {
  60       int w, d, e;
  61     }
  62     real;
  63
  64     struct
  65     {
  66       int length;
  67       char *p;
  68     }
  69     string;
  70
  71     struct
  72     {
  73       int w, m;
  74     }
  75     integer;
  76
  77     int w;
  78     int k;
  79     int r;
  80     int n;
  81
  82     struct fnode *child;
  83   }
  84   u;
  85
  86   /* Members for traversing the tree during data transfer.  */
  87
  88   int count;
  89   struct fnode *current;
  90
  91 };
  92
  93
  94 /* A storage structures for format node data.  */
  95
  96 #define FARRAY_SIZE 64
  97
  98 typedef struct fnode_array
  99 {
 100   struct fnode_array *next;
 101   fnode array[FARRAY_SIZE];
 102 }
 103 fnode_array;
 104
 105
 106 typedef struct format_data
 107 {
 108   char *format_string, *string;
 109   const char *error;
 110   char error_element;
 111   format_token saved_token;
 112   int value, format_string_len, reversion_ok;
 113   fnode *avail;
 114   const fnode *saved_format;
 115   fnode_array *last;
 116   fnode_array array;
 117 }
 118 format_data;
 119
 120 extern void parse_format (st_parameter_dt *);
 121 internal_proto(parse_format);
 122
 123 extern const fnode *next_format (st_parameter_dt *);
 124 internal_proto(next_format);
 125
 126 extern void unget_format (st_parameter_dt *, const fnode *);
 127 internal_proto(unget_format);
 128
 129 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 130 internal_proto(format_error);
 131
 132 extern void free_format_data (struct format_data *);
 133 internal_proto(free_format_data);
 134
 135 extern void free_format_hash_table (gfc_unit *);
 136 internal_proto(free_format_hash_table);
 137
 138 extern void init_format_hash (st_parameter_dt *);
 139 internal_proto(init_format_hash);
 140
 141 extern void free_format_hash (st_parameter_dt *);
 142 internal_proto(free_format_hash);
 143
 144 #endif