libgfortran/io/format.h

   1 /* Copyright (C) 2009-2017 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, FMT_DT
  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     struct
  78     {
  79       char *string;
  80       int string_len;
  81       gfc_array_i4 *vlist;
  82     }
  83     udf;  /* User Defined Format.  */
  84
  85     int w;
  86     int k;
  87     int r;
  88     int n;
  89
  90     struct fnode *child;
  91   }
  92   u;
  93
  94   /* Members for traversing the tree during data transfer.  */
  95
  96   int count;
  97   struct fnode *current;
  98
  99 };
 100
 101
 102 /* A storage structures for format node data.  */
 103
 104 #define FARRAY_SIZE 64
 105
 106 typedef struct fnode_array
 107 {
 108   struct fnode_array *next;
 109   fnode array[FARRAY_SIZE];
 110 }
 111 fnode_array;
 112
 113
 114 typedef struct format_data
 115 {
 116   char *format_string, *string;
 117   const char *error;
 118   char error_element;
 119   format_token saved_token;
 120   int value, format_string_len, reversion_ok;
 121   fnode *avail;
 122   const fnode *saved_format;
 123   fnode_array *last;
 124   fnode_array array;
 125 }
 126 format_data;
 127
 128 extern void parse_format (st_parameter_dt *);
 129 internal_proto(parse_format);
 130
 131 extern const fnode *next_format (st_parameter_dt *);
 132 internal_proto(next_format);
 133
 134 extern void unget_format (st_parameter_dt *, const fnode *);
 135 internal_proto(unget_format);
 136
 137 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 138 internal_proto(format_error);
 139
 140 extern void free_format_data (struct format_data *);
 141 internal_proto(free_format_data);
 142
 143 extern void free_format (st_parameter_dt *);
 144 internal_proto(free_format);
 145
 146 extern void free_format_hash_table (gfc_unit *);
 147 internal_proto(free_format_hash_table);
 148
 149 extern void init_format_hash (st_parameter_dt *);
 150 internal_proto(init_format_hash);
 151
 152 extern void free_format_hash (st_parameter_dt *);
 153 internal_proto(free_format_hash);
 154
 155 #endif