libgfortran/intrinsics/link.c

   1 /* Implementation of the LINK intrinsic.
   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., 59 Temple Place - Suite 330,
  29 Boston, MA 02111-1307, USA.  */
  30
  31 #include "config.h"
  32 #include "libgfortran.h"
  33
  34 #include <errno.h>
  35
  36 #include "../io/io.h"
  37
  38 #ifdef HAVE_UNISTD_H
  39 #include <unistd.h>
  40 #endif
  41
  42 /* SUBROUTINE LINK(PATH1, PATH2, STATUS)
  43    CHARACTER(len=*), INTENT(IN) :: PATH1, PATH2
  44    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  45
  46 #ifdef HAVE_LINK
  47 extern void link_i4_sub (char *, char *, GFC_INTEGER_4 *, gfc_charlen_type,
  48                          gfc_charlen_type);
  49 iexport_proto(link_i4_sub);
  50
  51 void
  52 link_i4_sub (char *path1, char *path2, GFC_INTEGER_4 *status,
  53              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  54 {
  55   int val;
  56   char *str1, *str2;
  57
  58   /* Trim trailing spaces from paths.  */
  59   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  60     path1_len--;
  61   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  62     path2_len--;
  63
  64   /* Make a null terminated copy of the strings.  */
  65   str1 = gfc_alloca (path1_len + 1);
  66   memcpy (str1, path1, path1_len);
  67   str1[path1_len] = '\0';
  68
  69   str2 = gfc_alloca (path2_len + 1);
  70   memcpy (str2, path2, path2_len);
  71   str2[path2_len] = '\0';
  72
  73   val = link (str1, str2);
  74
  75   if (status != NULL)
  76     *status = (val == 0) ? 0 : errno;
  77 }
  78 iexport(link_i4_sub);
  79
  80 extern void link_i8_sub (char *, char *, GFC_INTEGER_8 *, gfc_charlen_type,
  81                          gfc_charlen_type);
  82 iexport_proto(link_i8_sub);
  83
  84 void
  85 link_i8_sub (char *path1, char *path2, GFC_INTEGER_8 *status,
  86              gfc_charlen_type path1_len, gfc_charlen_type path2_len)
  87 {
  88   int val;
  89   char *str1, *str2;
  90
  91   /* Trim trailing spaces from paths.  */
  92   while (path1_len > 0 && path1[path1_len - 1] == ' ')
  93     path1_len--;
  94   while (path2_len > 0 && path2[path2_len - 1] == ' ')
  95     path2_len--;
  96
  97   /* Make a null terminated copy of the strings.  */
  98   str1 = gfc_alloca (path1_len + 1);
  99   memcpy (str1, path1, path1_len);
 100   str1[path1_len] = '\0';
 101
 102   str2 = gfc_alloca (path2_len + 1);
 103   memcpy (str2, path2, path2_len);
 104   str2[path2_len] = '\0';
 105
 106   val = link (str1, str2);
 107
 108   if (status != NULL)
 109     *status = (val == 0) ? 0 : errno;
 110 }
 111 iexport(link_i8_sub);
 112
 113 extern GFC_INTEGER_4 link_i4 (char *, char *, gfc_charlen_type,
 114                               gfc_charlen_type);
 115 export_proto(link_i4);
 116
 117 GFC_INTEGER_4
 118 link_i4 (char *path1, char *path2, gfc_charlen_type path1_len,
 119          gfc_charlen_type path2_len)
 120 {
 121   GFC_INTEGER_4 val;
 122   link_i4_sub (path1, path2, &val, path1_len, path2_len);
 123   return val;
 124 }
 125
 126 extern GFC_INTEGER_8 link_i8 (char *, char *, gfc_charlen_type,
 127                               gfc_charlen_type);
 128 export_proto(link_i8);
 129
 130 GFC_INTEGER_8
 131 link_i8 (char *path1, char *path2, gfc_charlen_type path1_len,
 132          gfc_charlen_type path2_len)
 133 {
 134   GFC_INTEGER_8 val;
 135   link_i8_sub (path1, path2, &val, path1_len, path2_len);
 136   return val;
 137 }
 138 #endif