libgfortran/intrinsics/link.c

   1 /* Implementation of the LINK intrinsic.
   2    Copyright (C) 2005, 2007 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 "libgfortran.h"
  32
  33 #include <errno.h>
  34 #include <string.h>
  35
  36 #ifdef HAVE_UNISTD_H
  37 #include <unistd.h>
  38 #endif
  39
  40 /* SUBROUTINE LINK(PATH1, PATH2, STATUS)
  41    CHARACTER(len=*), INTENT(IN) :: PATH1, PATH2
  42    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  43
  44 #ifdef HAVE_LINK
  45 extern void link_i4_sub (char *, char *, GFC_INTEGER_4 *, gfc_charlen_type,
  46                          gfc_charlen_type);
  47 iexport_proto(link_i4_sub);
  48
  49 void
  50 link_i4_sub (char *path1, char *path2, GFC_INTEGER_4 *status,
  51              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  52 {
  53   int val;
  54   char *str1, *str2;
  55
  56   /* Trim trailing spaces from paths.  */
  57   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  58     path1_len--;
  59   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  60     path2_len--;
  61
  62   /* Make a null terminated copy of the strings.  */
  63   str1 = gfc_alloca (path1_len + 1);
  64   memcpy (str1, path1, path1_len);
  65   str1[path1_len] = '\0';
  66
  67   str2 = gfc_alloca (path2_len + 1);
  68   memcpy (str2, path2, path2_len);
  69   str2[path2_len] = '\0';
  70
  71   val = link (str1, str2);
  72
  73   if (status != NULL)
  74     *status = (val == 0) ? 0 : errno;
  75 }
  76 iexport(link_i4_sub);
  77
  78 extern void link_i8_sub (char *, char *, GFC_INTEGER_8 *, gfc_charlen_type,
  79                          gfc_charlen_type);
  80 iexport_proto(link_i8_sub);
  81
  82 void
  83 link_i8_sub (char *path1, char *path2, GFC_INTEGER_8 *status,
  84              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  85 {
  86   int val;
  87   char *str1, *str2;
  88
  89   /* Trim trailing spaces from paths.  */
  90   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  91     path1_len--;
  92   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  93     path2_len--;
  94
  95   /* Make a null terminated copy of the strings.  */
  96   str1 = gfc_alloca (path1_len + 1);
  97   memcpy (str1, path1, path1_len);
  98   str1[path1_len] = '\0';
  99
 100   str2 = gfc_alloca (path2_len + 1);
 101   memcpy (str2, path2, path2_len);
 102   str2[path2_len] = '\0';
 103
 104   val = link (str1, str2);
 105
 106   if (status != NULL)
 107     *status = (val == 0) ? 0 : errno;
 108 }
 109 iexport(link_i8_sub);
 110
 111 extern GFC_INTEGER_4 link_i4 (char *, char *, gfc_charlen_type,
 112                               gfc_charlen_type);
 113 export_proto(link_i4);
 114
 115 GFC_INTEGER_4
 116 link_i4 (char *path1, char *path2, gfc_charlen_type path1_len,
 117          gfc_charlen_type path2_len)
 118 {
 119   GFC_INTEGER_4 val;
 120   link_i4_sub (path1, path2, &val, path1_len, path2_len);
 121   return val;
 122 }
 123
 124 extern GFC_INTEGER_8 link_i8 (char *, char *, gfc_charlen_type,
 125                               gfc_charlen_type);
 126 export_proto(link_i8);
 127
 128 GFC_INTEGER_8
 129 link_i8 (char *path1, char *path2, gfc_charlen_type path1_len,
 130          gfc_charlen_type path2_len)
 131 {
 132   GFC_INTEGER_8 val;
 133   link_i8_sub (path1, path2, &val, path1_len, path2_len);
 134   return val;
 135 }
 136 #endif