1 /****************************************************************************
3 * GNAT RUN-TIME COMPONENTS *
7 * Auxiliary C functions for Interfaces.C.Streams *
9 * Copyright (C) 1992-2011, Free Software Foundation, Inc. *
11 * GNAT is free software; you can redistribute it and/or modify it under *
12 * terms of the GNU General Public License as published by the Free Soft- *
13 * ware Foundation; either version 3, or (at your option) any later ver- *
14 * sion. GNAT is distributed in the hope that it will be useful, but WITH- *
15 * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
16 * or FITNESS FOR A PARTICULAR PURPOSE. *
18 * As a special exception under Section 7 of GPL version 3, you are granted *
19 * additional permissions described in the GCC Runtime Library Exception, *
20 * version 3.1, as published by the Free Software Foundation. *
22 * You should have received a copy of the GNU General Public License and *
23 * a copy of the GCC Runtime Library Exception along with this program; *
24 * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
25 * <http://www.gnu.org/licenses/>. *
27 * GNAT was originally developed by the GNAT team at New York University. *
28 * Extensive contributions were provided by Ada Core Technologies Inc. *
30 ****************************************************************************/
32 /* Routines required for implementing routines in Interfaces.C.Streams. */
58 /* Don't use macros on GNU/Linux since they cause incompatible changes between
73 /* Don't use macros versions of this functions on VxWorks since they cause
74 imcompatible changes in some VxWorks versions */
83 /* The _IONBF value in MINGW32 stdio.h is wrong. */
84 #if defined (WINNT) || defined (_WINNT)
92 __gnat_feof (FILE *stream)
94 return (feof (stream));
98 __gnat_ferror (FILE *stream)
100 return (ferror (stream));
104 __gnat_fileno (FILE *stream)
106 return (fileno (stream));
110 __gnat_is_regular_file_fd (int fd)
113 GNAT_STRUCT_STAT statbuf;
115 ret = GNAT_FSTAT (fd, &statbuf);
116 return (!ret && S_ISREG (statbuf.st_mode));
119 /* on some systems, the constants for seek are not defined, if so, then
120 provide the conventional definitions */
123 #define SEEK_SET 0 /* Set file pointer to offset */
124 #define SEEK_CUR 1 /* Set file pointer to its current value plus offset */
125 #define SEEK_END 2 /* Set file pointer to the size of the file plus offset */
128 /* if L_tmpnam is not set, use a large number that should be safe */
133 int __gnat_constant_eof = EOF;
134 int __gnat_constant_iofbf = _IOFBF;
135 int __gnat_constant_iolbf = _IOLBF;
136 int __gnat_constant_ionbf = _IONBF;
137 int __gnat_constant_l_tmpnam = L_tmpnam;
138 int __gnat_constant_seek_cur = SEEK_CUR;
139 int __gnat_constant_seek_end = SEEK_END;
140 int __gnat_constant_seek_set = SEEK_SET;
143 __gnat_constant_stderr (void)
149 __gnat_constant_stdin (void)
155 __gnat_constant_stdout (void)
161 __gnat_full_name (char *nam, char *buffer)
164 /* RTSS applications have no current-directory notion, so RTSS file I/O
165 requests must use fully qualified path names, such as:
166 c:\temp\MyFile.txt (for a file system object)
167 \\.\MyDevice0 (for a device object)
169 if (nam[1] == ':' || nam[0] == '\\')
170 strcpy (buffer, nam);
174 #elif defined (__MINGW32__)
175 /* If this is a device file return it as is;
176 under Windows NT a device file ends with ":". */
177 if (nam[strlen (nam) - 1] == ':')
178 strcpy (buffer, nam);
183 _fullpath (buffer, nam, __gnat_max_path_len);
185 for (p = buffer; *p; p++)
190 #elif defined (sgi) || defined (__FreeBSD__)
192 /* Use realpath function which resolves links and references to . and ..
193 on those Unix systems that support it. Note that GNU/Linux provides it but
194 cannot handle more than 5 symbolic links in a full name, so we use the
195 getcwd approach instead. */
196 realpath (nam, buffer);
199 strncpy (buffer, __gnat_to_canonical_file_spec (nam), __gnat_max_path_len);
201 if (buffer[0] == '/' || strchr (buffer, '!')) /* '!' means decnet node */
202 strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
205 char *nambuffer = alloca (__gnat_max_path_len);
207 strncpy (nambuffer, buffer, __gnat_max_path_len);
209 (buffer, getcwd (buffer, __gnat_max_path_len, 0), __gnat_max_path_len);
210 strncat (buffer, "/", __gnat_max_path_len);
211 strncat (buffer, nambuffer, __gnat_max_path_len);
212 strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
215 #elif defined (__vxworks)
217 /* On VxWorks systems, an absolute path can be represented (depending on
218 the host platform) as either /dir/file, or device:/dir/file, or
219 device:drive_letter:/dir/file. Use the __gnat_is_absolute_path
224 if (__gnat_is_absolute_path (nam, strlen (nam)))
225 strcpy (buffer, nam);
229 length = __gnat_max_path_len;
230 __gnat_get_current_dir (buffer, &length);
231 strncat (buffer, nam, __gnat_max_path_len - length - 1);
237 char *p = getcwd (buffer, __gnat_max_path_len);
246 /* If the name returned is an absolute path, it is safe to append '/'
247 to the path and concatenate the name of the file. */
248 if (buffer[0] == '/')
249 strcat (buffer, "/");
251 strcat (buffer, nam);
254 strcpy (buffer, nam);