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 /* The _IONBF value in MINGW32 stdio.h is wrong. */
74 #if defined (WINNT) || defined (_WINNT)
82 __gnat_feof (FILE *stream)
84 return (feof (stream));
88 __gnat_ferror (FILE *stream)
90 return (ferror (stream));
94 __gnat_fileno (FILE *stream)
96 return (fileno (stream));
100 __gnat_is_regular_file_fd (int fd)
103 GNAT_STRUCT_STAT statbuf;
105 ret = GNAT_FSTAT (fd, &statbuf);
106 return (!ret && S_ISREG (statbuf.st_mode));
109 /* on some systems, the constants for seek are not defined, if so, then
110 provide the conventional definitions */
113 #define SEEK_SET 0 /* Set file pointer to offset */
114 #define SEEK_CUR 1 /* Set file pointer to its current value plus offset */
115 #define SEEK_END 2 /* Set file pointer to the size of the file plus offset */
118 /* if L_tmpnam is not set, use a large number that should be safe */
123 int __gnat_constant_eof = EOF;
124 int __gnat_constant_iofbf = _IOFBF;
125 int __gnat_constant_iolbf = _IOLBF;
126 int __gnat_constant_ionbf = _IONBF;
127 int __gnat_constant_l_tmpnam = L_tmpnam;
128 int __gnat_constant_seek_cur = SEEK_CUR;
129 int __gnat_constant_seek_end = SEEK_END;
130 int __gnat_constant_seek_set = SEEK_SET;
133 __gnat_constant_stderr (void)
139 __gnat_constant_stdin (void)
145 __gnat_constant_stdout (void)
151 __gnat_full_name (char *nam, char *buffer)
154 /* RTSS applications have no current-directory notion, so RTSS file I/O
155 requests must use fully qualified path names, such as:
156 c:\temp\MyFile.txt (for a file system object)
157 \\.\MyDevice0 (for a device object)
159 if (nam[1] == ':' || nam[0] == '\\')
160 strcpy (buffer, nam);
164 #elif defined (__MINGW32__)
165 /* If this is a device file return it as is;
166 under Windows NT a device file ends with ":". */
167 if (nam[strlen (nam) - 1] == ':')
168 strcpy (buffer, nam);
173 _fullpath (buffer, nam, __gnat_max_path_len);
175 for (p = buffer; *p; p++)
180 #elif defined (sgi) || defined (__FreeBSD__)
182 /* Use realpath function which resolves links and references to . and ..
183 on those Unix systems that support it. Note that GNU/Linux provides it but
184 cannot handle more than 5 symbolic links in a full name, so we use the
185 getcwd approach instead. */
186 realpath (nam, buffer);
189 strncpy (buffer, __gnat_to_canonical_file_spec (nam), __gnat_max_path_len);
191 if (buffer[0] == '/' || strchr (buffer, '!')) /* '!' means decnet node */
192 strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
195 char *nambuffer = alloca (__gnat_max_path_len);
197 strncpy (nambuffer, buffer, __gnat_max_path_len);
199 (buffer, getcwd (buffer, __gnat_max_path_len, 0), __gnat_max_path_len);
200 strncat (buffer, "/", __gnat_max_path_len);
201 strncat (buffer, nambuffer, __gnat_max_path_len);
202 strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len);
205 #elif defined (__vxworks)
207 /* On VxWorks systems, an absolute path can be represented (depending on
208 the host platform) as either /dir/file, or device:/dir/file, or
209 device:drive_letter:/dir/file. Use the __gnat_is_absolute_path
214 if (__gnat_is_absolute_path (nam, strlen (nam)))
215 strcpy (buffer, nam);
219 length = __gnat_max_path_len;
220 __gnat_get_current_dir (buffer, &length);
221 strncat (buffer, nam, __gnat_max_path_len - length - 1);
227 char *p = getcwd (buffer, __gnat_max_path_len);
236 /* If the name returned is an absolute path, it is safe to append '/'
237 to the path and concatenate the name of the file. */
238 if (buffer[0] == '/')
239 strcat (buffer, "/");
241 strcat (buffer, nam);
244 strcpy (buffer, nam);