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/* STDIO.C
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*
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* Portions Copyright (c) 1990-1999 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* All rights reserved.
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*/
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/* No user fns here. Pesch 15apr92. */
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <stdio.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/unistd.h>
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#include "LOCAL.H"
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/*
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* Small standard I/O/seek/close functions.
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* These maintain the `known seek offset' for seek optimisation.
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*/
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int
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__sread (void* cookie,char *buf,int n)
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{
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register FILE *fp = (FILE *) cookie;
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register int ret;
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ret = _read_r(fp->_data, fp->_file, buf, n);
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/* If the read succeeded, update the current offset. */
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if (ret >= 0)
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fp->_offset += ret;
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else
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fp->_flags &= ~__SOFF; /* paranoia */
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return ret;
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}
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int
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__swrite (void* cookie,char const *buf,int n)
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{
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register FILE *fp = (FILE *) cookie;
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if (fp->_flags & __SAPP)
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(void) _lseek_r (fp->_data, fp->_file, (off_t) 0, SEEK_END);
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fp->_flags &= ~__SOFF; /* in case O_APPEND mode is set */
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return _write_r (fp->_data, fp->_file, buf, n);
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}
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fpos_t
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__sseek (void* cookie,fpos_t offset,int whence)
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{
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register FILE *fp = (FILE *) cookie;
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register off_t ret;
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ret = _lseek_r (fp->_data, fp->_file, (off_t) offset, whence);
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if (ret == -1L)
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fp->_flags &= ~__SOFF;
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else
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{
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fp->_flags |= __SOFF;
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fp->_offset = ret;
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}
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return ret;
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}
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int
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__sclose (void* cookie)
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{
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FILE *fp = (FILE *) cookie;
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return _close_r (fp->_data, fp->_file);
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}
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