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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [ada/] [cstreams.c] - Rev 307
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/**************************************************************************** * * * GNAT RUN-TIME COMPONENTS * * * * C S T R E A M S * * * * Auxiliary C functions for Interfaces.C.Streams * * * * Copyright (C) 1992-2009, Free Software Foundation, Inc. * * * * GNAT is free software; you can redistribute it and/or modify it under * * terms of the GNU General Public License as published by the Free Soft- * * ware Foundation; either version 3, or (at your option) any later ver- * * sion. GNAT is distributed in the hope that it will be useful, but WITH- * * OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * * or FITNESS FOR A PARTICULAR PURPOSE. * * * * As a special exception under Section 7 of GPL version 3, you are granted * * additional permissions described in the GCC Runtime Library Exception, * * version 3.1, as published by the Free Software Foundation. * * * * You should have received a copy of the GNU General Public License and * * a copy of the GCC Runtime Library Exception along with this program; * * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see * * <http://www.gnu.org/licenses/>. * * * * GNAT was originally developed by the GNAT team at New York University. * * Extensive contributions were provided by Ada Core Technologies Inc. * * * ****************************************************************************/ /* Routines required for implementing routines in Interfaces.C.Streams */ #ifdef __vxworks #include "vxWorks.h" #endif #ifdef IN_RTS #include "tconfig.h" #include "tsystem.h" #include <sys/stat.h> #else #include "config.h" #include "system.h" #endif #include "adaint.h" #ifdef VMS #include <unixlib.h> #endif #ifdef linux /* Don't use macros on GNU/Linux since they cause incompatible changes between glibc 2.0 and 2.1 */ #ifdef stderr # undef stderr #endif #ifdef stdin # undef stdin #endif #ifdef stdout # undef stdout #endif #endif /* The _IONBF value in MINGW32 stdio.h is wrong. */ #if defined (WINNT) || defined (_WINNT) #if OLD_MINGW #undef _IONBF #define _IONBF 0004 #endif #endif int __gnat_feof (FILE *stream) { return (feof (stream)); } int __gnat_ferror (FILE *stream) { return (ferror (stream)); } int __gnat_fileno (FILE *stream) { return (fileno (stream)); } int __gnat_is_regular_file_fd (int fd) { int ret; GNAT_STRUCT_STAT statbuf; #ifdef __EMX__ /* Programs using screen I/O may need to reset the FPU after initialization of screen-handling related DLL's, so force DLL initialization by doing a null-write and then reset the FPU */ DosWrite (0, &ret, 0, &ret); __gnat_init_float(); #endif ret = GNAT_FSTAT (fd, &statbuf); return (!ret && S_ISREG (statbuf.st_mode)); } /* on some systems, the constants for seek are not defined, if so, then provide the conventional definitions */ #ifndef SEEK_SET #define SEEK_SET 0 /* Set file pointer to offset */ #define SEEK_CUR 1 /* Set file pointer to its current value plus offset */ #define SEEK_END 2 /* Set file pointer to the size of the file plus offset */ #endif /* if L_tmpnam is not set, use a large number that should be safe */ #ifndef L_tmpnam #define L_tmpnam 256 #endif int __gnat_constant_eof = EOF; int __gnat_constant_iofbf = _IOFBF; int __gnat_constant_iolbf = _IOLBF; int __gnat_constant_ionbf = _IONBF; int __gnat_constant_l_tmpnam = L_tmpnam; int __gnat_constant_seek_cur = SEEK_CUR; int __gnat_constant_seek_end = SEEK_END; int __gnat_constant_seek_set = SEEK_SET; FILE * __gnat_constant_stderr (void) { return stderr; } FILE * __gnat_constant_stdin (void) { return stdin; } FILE * __gnat_constant_stdout (void) { return stdout; } char * __gnat_full_name (char *nam, char *buffer) { #ifdef RTSS /* RTSS applications have no current-directory notion, so RTSS file I/O requests must use fully qualified path names, such as: c:\temp\MyFile.txt (for a file system object) \\.\MyDevice0 (for a device object) */ if (nam[1] == ':' || nam[0] == '\\') strcpy (buffer, nam); else buffer[0] = '\0'; #elif defined(__EMX__) || defined (__MINGW32__) /* If this is a device file return it as is; under Windows NT and OS/2 a device file end with ":". */ if (nam[strlen (nam) - 1] == ':') strcpy (buffer, nam); else { char *p; _fullpath (buffer, nam, __gnat_max_path_len); for (p = buffer; *p; p++) if (*p == '/') *p = '\\'; } #elif defined (MSDOS) _fixpath (nam, buffer); #elif defined (sgi) || defined (__FreeBSD__) /* Use realpath function which resolves links and references to . and .. on those Unix systems that support it. Note that GNU/Linux provides it but cannot handle more than 5 symbolic links in a full name, so we use the getcwd approach instead. */ realpath (nam, buffer); #elif defined (VMS) strncpy (buffer, __gnat_to_canonical_file_spec (nam), __gnat_max_path_len); if (buffer[0] == '/' || strchr (buffer, '!')) /* '!' means decnet node */ strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len); else { char *nambuffer = alloca (__gnat_max_path_len); strncpy (nambuffer, buffer, __gnat_max_path_len); strncpy (buffer, getcwd (buffer, __gnat_max_path_len, 0), __gnat_max_path_len); strncat (buffer, "/", __gnat_max_path_len); strncat (buffer, nambuffer, __gnat_max_path_len); strncpy (buffer, __gnat_to_host_file_spec (buffer), __gnat_max_path_len); } #elif defined (__vxworks) /* On VxWorks systems, an absolute path can be represented (depending on the host platform) as either /dir/file, or device:/dir/file, or device:drive_letter:/dir/file. Use the __gnat_is_absolute_path to verify it. */ int length; if (__gnat_is_absolute_path (nam, strlen (nam))) strcpy (buffer, nam); else { length = __gnat_max_path_len; __gnat_get_current_dir (buffer, &length); strncat (buffer, nam, __gnat_max_path_len - length - 1); } #else if (nam[0] != '/') { char *p = getcwd (buffer, __gnat_max_path_len); if (p == 0) { buffer[0] = '\0'; return 0; } /* If the name returned is an absolute path, it is safe to append '/' to the path and concatenate the name of the file. */ if (buffer[0] == '/') strcat (buffer, "/"); strcat (buffer, nam); } else strcpy (buffer, nam); #endif return buffer; }
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