mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-16 03:42:35 +03:00
114 lines
3.1 KiB
C
114 lines
3.1 KiB
C
|
/*
|
||
|
|
* Copyright (c) 1990, 2007 The Regents of the University of California.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms are permitted
|
||
|
|
* provided that the above copyright notice and this paragraph are
|
||
|
|
* duplicated in all such forms and that any documentation,
|
||
|
|
* advertising materials, and other materials related to such
|
||
|
|
* distribution and use acknowledge that the software was developed
|
||
|
|
* by the University of California, Berkeley. The name of the
|
||
|
|
* University may not be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
||
|
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
||
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
||
|
|
*/
|
||
|
|
/* No user fns here. Pesch 15apr92. */
|
||
|
|
|
||
|
|
#include <_ansi.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <sys/stat.h>
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/unistd.h>
|
||
|
|
#include "local.h"
|
||
|
|
|
||
|
|
#define _DEFAULT_ASPRINTF_BUFSIZE 64
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Allocate a file buffer, or switch to unbuffered I/O.
|
||
|
|
* Per the ANSI C standard, ALL tty devices default to line buffered.
|
||
|
|
*
|
||
|
|
* As a side effect, we set __SOPT or __SNPT (en/dis-able fseek
|
||
|
|
* optimization) right after the _fstat() that finds the buffer size.
|
||
|
|
*/
|
||
|
|
|
||
|
|
_VOID
|
||
|
|
_DEFUN(__smakebuf_r, (ptr, fp),
|
||
|
|
struct _reent *ptr _AND
|
||
|
|
register FILE *fp)
|
||
|
|
{
|
||
|
|
register size_t size, couldbetty;
|
||
|
|
register _PTR p;
|
||
|
|
#ifdef __USE_INTERNAL_STAT64
|
||
|
|
struct stat64 st;
|
||
|
|
#else
|
||
|
|
struct stat st;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (fp->_flags & __SNBF)
|
||
|
|
{
|
||
|
|
fp->_bf._base = fp->_p = fp->_nbuf;
|
||
|
|
fp->_bf._size = 1;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
#ifdef __USE_INTERNAL_STAT64
|
||
|
|
if (fp->_file < 0 || _fstat64_r (ptr, fp->_file, &st) < 0)
|
||
|
|
#else
|
||
|
|
if (fp->_file < 0 || _fstat_r (ptr, fp->_file, &st) < 0)
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
couldbetty = 0;
|
||
|
|
/* Check if we are be called by asprintf family for initial buffer. */
|
||
|
|
if (fp->_flags & __SMBF)
|
||
|
|
size = _DEFAULT_ASPRINTF_BUFSIZE;
|
||
|
|
else
|
||
|
|
size = BUFSIZ;
|
||
|
|
/* do not try to optimise fseek() */
|
||
|
|
fp->_flags |= __SNPT;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
couldbetty = (st.st_mode & S_IFMT) == S_IFCHR;
|
||
|
|
#ifdef HAVE_BLKSIZE
|
||
|
|
size = st.st_blksize <= 0 ? BUFSIZ : st.st_blksize;
|
||
|
|
#else
|
||
|
|
size = BUFSIZ;
|
||
|
|
#endif
|
||
|
|
/*
|
||
|
|
* Optimize fseek() only if it is a regular file.
|
||
|
|
* (The test for __sseek is mainly paranoia.)
|
||
|
|
*/
|
||
|
|
if ((st.st_mode & S_IFMT) == S_IFREG && fp->_seek == __sseek)
|
||
|
|
{
|
||
|
|
fp->_flags |= __SOPT;
|
||
|
|
#ifdef HAVE_BLKSIZE
|
||
|
|
fp->_blksize = st.st_blksize;
|
||
|
|
#else
|
||
|
|
fp->_blksize = 1024;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
else
|
||
|
|
fp->_flags |= __SNPT;
|
||
|
|
}
|
||
|
|
if ((p = _malloc_r (ptr, size)) == NULL)
|
||
|
|
{
|
||
|
|
if (!(fp->_flags & __SSTR))
|
||
|
|
{
|
||
|
|
fp->_flags |= __SNBF;
|
||
|
|
fp->_bf._base = fp->_p = fp->_nbuf;
|
||
|
|
fp->_bf._size = 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ptr->__cleanup = _cleanup_r;
|
||
|
|
fp->_flags |= __SMBF;
|
||
|
|
fp->_bf._base = fp->_p = (unsigned char *) p;
|
||
|
|
fp->_bf._size = size;
|
||
|
|
if (couldbetty && _isatty_r (ptr, fp->_file))
|
||
|
|
fp->_flags |= __SLBF;
|
||
|
|
}
|
||
|
|
}
|