/**************************************************************************** * * * GNAT RUN-TIME COMPONENTS * * * * C S T R E A M S * * * * Auxiliary C functions for Interfaces.C.Streams * * * * * * Copyright (C) 1992-2001 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 2, 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. See the GNU General Public License * * for more details. You should have received a copy of the GNU General * * Public License distributed with GNAT; see file COPYING. If not, write * * to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, * * MA 02111-1307, USA. * * * * As a special exception, if you link this file with other files to * * produce an executable, this file does not by itself cause the resulting * * executable to be covered by the GNU General Public License. This except- * * ion does not however invalidate any other reasons why the executable * * file might be covered by the GNU Public License. * * * * 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 CYGNUS or MINGW32 stdio.h is wrong. */ #if defined (WINNT) || defined (_WINNT) #undef _IONBF #define _IONBF 0004 #endif int __gnat_feof (stream) FILE *stream; { return (feof (stream)); } int __gnat_ferror (stream) FILE *stream; { return (ferror (stream)); } int __gnat_fileno (stream) FILE *stream; { return (fileno (stream)); } int __gnat_is_regular_file_fd (fd) int fd; { int ret; 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 = 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 () { return stderr; } FILE * __gnat_constant_stdin () { return stdin; } FILE * __gnat_constant_stdout () { return stdout; } char * __gnat_full_name (nam, buffer) char *nam; char *buffer; { char *p; #if 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 { _fullpath (buffer, nam, __gnat_max_path_len); for (p = buffer; *p; p++) if (*p == '/') *p = '\\'; } #elif defined (MSDOS) _fixpath (nam, buffer); #elif defined (sgi) /* 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) strcpy (buffer, __gnat_to_canonical_file_spec (nam)); if (buffer[0] == '/') strcpy (buffer, __gnat_to_host_file_spec (buffer)); else { char *nambuffer = alloca (__gnat_max_path_len); strcpy (nambuffer, buffer); strcpy (buffer, getcwd (buffer, __gnat_max_path_len, 0)); strcat (buffer, "/"); strcat (buffer, nambuffer); strcpy (buffer, __gnat_to_host_file_spec (buffer)); } return buffer; #else if (nam[0] != '/') { 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); return buffer; #endif }