libgfortran/intrinsics/tty.c

   1 /* Implementation of the ISATTY and TTYNAM g77 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 #include "../io/io.h"
  34
  35 #include <string.h>
  36
  37 /* LOGICAL FUNCTION ISATTY(UNIT)
  38    INTEGER, INTENT(IN) :: UNIT */
  39
  40 extern GFC_LOGICAL_4 isatty_l4 (int *);
  41 export_proto(isatty_l4);
  42
  43 GFC_LOGICAL_4
  44 isatty_l4 (int *unit)
  45 {
  46   gfc_unit *u;
  47   GFC_LOGICAL_4 ret = 0;
  48
  49   u = find_unit (*unit);
  50   if (u != NULL)
  51     {
  52       ret = (GFC_LOGICAL_4) stream_isatty (u->s);
  53       unlock_unit (u);
  54     }
  55   return ret;
  56 }
  57
  58
  59 extern GFC_LOGICAL_8 isatty_l8 (int *);
  60 export_proto(isatty_l8);
  61
  62 GFC_LOGICAL_8
  63 isatty_l8 (int *unit)
  64 {
  65   gfc_unit *u;
  66   GFC_LOGICAL_8 ret = 0;
  67
  68   u = find_unit (*unit);
  69   if (u != NULL)
  70     {
  71       ret = (GFC_LOGICAL_8) stream_isatty (u->s);
  72       unlock_unit (u);
  73     }
  74   return ret;
  75 }
  76
  77
  78 /* SUBROUTINE TTYNAM(UNIT,NAME)
  79    INTEGER,SCALAR,INTENT(IN) :: UNIT
  80    CHARACTER,SCALAR,INTENT(OUT) :: NAME */
  81
  82 extern void ttynam_sub (int *, char *, gfc_charlen_type);
  83 export_proto(ttynam_sub);
  84
  85 void
  86 ttynam_sub (int *unit, char * name, gfc_charlen_type name_len)
  87 {
  88   gfc_unit *u;
  89   char * n;
  90   int i;
  91
  92   memset (name, ' ', name_len);
  93   u = find_unit (*unit);
  94   if (u != NULL)
  95     {
  96       n = stream_ttyname (u->s);
  97       if (n != NULL)
  98         {
  99           i = 0;
 100           while (*n && i < name_len)
 101             name[i++] = *(n++);
 102         }
 103       unlock_unit (u);
 104     }
 105 }
 106
 107
 108 extern void ttynam (char **, gfc_charlen_type *, int);
 109 export_proto(ttynam);
 110
 111 void
 112 ttynam (char ** name, gfc_charlen_type * name_len, int unit)
 113 {
 114   gfc_unit *u;
 115
 116   u = find_unit (unit);
 117   if (u != NULL)
 118     {
 119       *name = stream_ttyname (u->s);
 120       if (*name != NULL)
 121         {
 122           *name_len = strlen (*name);
 123           *name = strdup (*name);
 124           unlock_unit (u);
 125           return;
 126         }
 127       unlock_unit (u);
 128     }
 129
 130   *name_len = 0;
 131   *name = NULL;
 132 }