newlib/libc/stdio64/stdio64.c

   1 /* No user fns here.  Pesch 15apr92. */
   2
   3 /*
   4  * Copyright (c) 1990 The Regents of the University of California.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms are permitted
   8  * provided that the above copyright notice and this paragraph are
   9  * duplicated in all such forms and that any documentation,
  10  * and/or other materials related to such
  11  * distribution and use acknowledge that the software was developed
  12  * by the University of California, Berkeley.  The name of the
  13  * University may not be used to endorse or promote products derived
  14  * from this software without specific prior written permission.
  15  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  18  */
  19
  20 #include <stdio.h>
  21 #include <sys/types.h>
  22 #include <fcntl.h>
  23 #include <sys/unistd.h>
  24 #include <errno.h>
  25 #include "local.h"
  26
  27 #ifdef __LARGE64_FILES
  28 _fpos64_t
  29 __sseek64 (struct _reent *ptr,
  30        void *cookie,
  31        _fpos64_t offset,
  32        int whence)
  33 {
  34   register FILE *fp = (FILE *) cookie;
  35   register _off64_t ret;
  36
  37   ret = _lseek64_r (ptr, fp->_file, (_off64_t) offset, whence);
  38   if (ret == (_fpos64_t)-1L)
  39     fp->_flags &= ~__SOFF;
  40   else
  41     {
  42       fp->_flags |= __SOFF;
  43       fp->_offset = ret;
  44     }
  45   return ret;
  46 }
  47
  48 _READ_WRITE_RETURN_TYPE
  49 __swrite64 (struct _reent *ptr,
  50        void *cookie,
  51        char const *buf,
  52        _READ_WRITE_BUFSIZE_TYPE n)
  53 {
  54   register FILE *fp = (FILE *) cookie;
  55   _READ_WRITE_RETURN_TYPE w;
  56 #ifdef __SCLE
  57   int oldmode=0;
  58 #endif
  59
  60   if (fp->_flags & __SAPP)
  61     (void) _lseek64_r (ptr, fp->_file, (_off64_t)0, SEEK_END);
  62   fp->_flags &= ~__SOFF;        /* in case O_APPEND mode is set */
  63
  64 #ifdef __SCLE
  65   if (fp->_flags & __SCLE)
  66     oldmode = setmode(fp->_file, O_BINARY);
  67 #endif
  68
  69   w = _write_r (ptr, fp->_file, buf, n);
  70
  71 #ifdef __SCLE
  72   if (oldmode)
  73     setmode(fp->_file, oldmode);
  74 #endif
  75
  76   return w;
  77 }
  78
  79 #endif /* __LARGE64_FILES */