libgfortran/intrinsics/fget.c

   1 /* Implementation of the FGET, FGETC, FPUT and FPUTC intrinsics.
   2    Copyright (C) 2005 Free Software Foundation, Inc.
   3    Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 2 of the License, or (at your option) any later version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful,
  22 but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 GNU General Public License for more details.
  25
  26 You should have received a copy of the GNU General Public
  27 License along with libgfortran; see the file COPYING.  If not,
  28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  29 Boston, MA 02110-1301, USA.  */
  30
  31 #include "config.h"
  32 #include "libgfortran.h"
  33
  34 #include <string.h>
  35
  36 #include "../io/io.h"
  37
  38 static const int five = 5;
  39 static const int six = 6;
  40
  41 extern int PREFIX(fgetc) (const int *, char *, gfc_charlen_type);
  42 export_proto_np(PREFIX(fgetc));
  43
  44 int
  45 PREFIX(fgetc) (const int * unit, char * c, gfc_charlen_type c_len)
  46 {
  47   int ret;
  48   size_t s;
  49   gfc_unit * u = find_unit (*unit);
  50
  51   if (u == NULL)
  52     return -1;
  53
  54   s = 1;
  55   memset (c, ' ', c_len);
  56   ret = sread (u->s, c, &s);
  57   unlock_unit (u);
  58
  59   if (ret != 0)
  60     return ret;
  61
  62   if (s != 1)
  63     return -1;
  64   else
  65     return 0;
  66 }
  67
  68
  69 #define FGETC_SUB(kind) \
  70   extern void fgetc_i ## kind ## _sub \
  71     (const int *, char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
  72   export_proto(fgetc_i ## kind ## _sub); \
  73   void fgetc_i ## kind ## _sub \
  74   (const int * unit, char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
  75     { if (st != NULL) \
  76         *st = PREFIX(fgetc) (unit, c, c_len); \
  77       else \
  78         PREFIX(fgetc) (unit, c, c_len); }
  79
  80 FGETC_SUB(1)
  81 FGETC_SUB(2)
  82 FGETC_SUB(4)
  83 FGETC_SUB(8)
  84
  85
  86 extern int PREFIX(fget) (char *, gfc_charlen_type);
  87 export_proto_np(PREFIX(fget));
  88
  89 int
  90 PREFIX(fget) (char * c, gfc_charlen_type c_len)
  91 {
  92   return PREFIX(fgetc) (&five, c, c_len);
  93 }
  94
  95
  96 #define FGET_SUB(kind) \
  97   extern void fget_i ## kind ## _sub \
  98     (char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
  99   export_proto(fget_i ## kind ## _sub); \
 100   void fget_i ## kind ## _sub \
 101   (char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
 102     { if (st != NULL) \
 103         *st = PREFIX(fgetc) (&five, c, c_len); \
 104       else \
 105         PREFIX(fgetc) (&five, c, c_len); }
 106
 107 FGET_SUB(1)
 108 FGET_SUB(2)
 109 FGET_SUB(4)
 110 FGET_SUB(8)
 111
 112
 113
 114 extern int PREFIX(fputc) (const int *, char *, gfc_charlen_type);
 115 export_proto_np(PREFIX(fputc));
 116
 117 int
 118 PREFIX(fputc) (const int * unit, char * c,
 119                gfc_charlen_type c_len __attribute__((unused)))
 120 {
 121   size_t s;
 122   int ret;
 123   gfc_unit * u = find_unit (*unit);
 124
 125   if (u == NULL)
 126     return -1;
 127
 128   s = 1;
 129   ret = swrite (u->s, c, &s);
 130   unlock_unit (u);
 131   return ret;
 132 }
 133
 134
 135 #define FPUTC_SUB(kind) \
 136   extern void fputc_i ## kind ## _sub \
 137     (const int *, char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
 138   export_proto(fputc_i ## kind ## _sub); \
 139   void fputc_i ## kind ## _sub \
 140   (const int * unit, char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
 141     { if (st != NULL) \
 142         *st = PREFIX(fputc) (unit, c, c_len); \
 143       else \
 144         PREFIX(fputc) (unit, c, c_len); }
 145
 146 FPUTC_SUB(1)
 147 FPUTC_SUB(2)
 148 FPUTC_SUB(4)
 149 FPUTC_SUB(8)
 150
 151
 152 extern int PREFIX(fput) (char *, gfc_charlen_type);
 153 export_proto_np(PREFIX(fput));
 154
 155 int
 156 PREFIX(fput) (char * c, gfc_charlen_type c_len)
 157 {
 158   return PREFIX(fputc) (&six, c, c_len);
 159 }
 160
 161
 162 #define FPUT_SUB(kind) \
 163   extern void fput_i ## kind ## _sub \
 164     (char *, GFC_INTEGER_ ## kind *, gfc_charlen_type); \
 165   export_proto(fput_i ## kind ## _sub); \
 166   void fput_i ## kind ## _sub \
 167   (char * c, GFC_INTEGER_ ## kind * st, gfc_charlen_type c_len) \
 168     { if (st != NULL) \
 169         *st = PREFIX(fputc) (&six, c, c_len); \
 170       else \
 171         PREFIX(fputc) (&six, c, c_len); }
 172
 173 FPUT_SUB(1)
 174 FPUT_SUB(2)
 175 FPUT_SUB(4)
 176 FPUT_SUB(8)
 177