1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/os/ossrv/genericopenlibs/cstdlib/LSTDIO/SETBUF.C	Fri Jun 15 03:10:57 2012 +0200
     1.3 @@ -0,0 +1,94 @@
     1.4 +/* SETBUF.C
     1.5 + * 
     1.6 + * Portions Copyright (c) 1990-1999 Nokia Corporation and/or its subsidiary(-ies).
     1.7 + * All rights reserved.
     1.8 + */
     1.9 +
    1.10 +/*
    1.11 + * Copyright (c) 1990 The Regents of the University of California.
    1.12 + * All rights reserved.
    1.13 + *
    1.14 + * Redistribution and use in source and binary forms are permitted
    1.15 + * provided that the above copyright notice and this paragraph are
    1.16 + * duplicated in all such forms and that any documentation,
    1.17 + * advertising materials, and other materials related to such
    1.18 + * distribution and use acknowledge that the software was developed
    1.19 + * by the University of California, Berkeley.  The name of the
    1.20 + * University may not be used to endorse or promote products derived
    1.21 + * from this software without specific prior written permission.
    1.22 + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
    1.23 + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
    1.24 + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    1.25 + */
    1.26 +
    1.27 +/*
    1.28 +FUNCTION
    1.29 +<<setbuf>>---specify full buffering for a file or stream
    1.30 +
    1.31 +INDEX
    1.32 +	setbuf
    1.33 +
    1.34 +ANSI_SYNOPSIS
    1.35 +	#include <stdio.h>
    1.36 +	void setbuf(FILE *<[fp]>, char *<[buf]>);
    1.37 +
    1.38 +TRAD_SYNOPSIS
    1.39 +	#include <stdio.h>
    1.40 +	void setbuf(<[fp]>, <[buf]>)
    1.41 +	FILE *<[fp]>;
    1.42 +	char *<[buf]>;
    1.43 +
    1.44 +DESCRIPTION
    1.45 +<<setbuf>> specifies that output to the file or stream identified by <[fp]>
    1.46 +should be fully buffered.  All output for this file will go to a
    1.47 +buffer (of size <<BUFSIZ>>, specified in `<<stdio.h>>').  Output will
    1.48 +be passed on to the host system only when the buffer is full, or when
    1.49 +an input operation intervenes.
    1.50 +
    1.51 +You may, if you wish, supply your own buffer by passing a pointer to
    1.52 +it as the argument <[buf]>.  It must have size <<BUFSIZ>>.  You can
    1.53 +also use <<NULL>> as the value of <[buf]>, to signal that the
    1.54 +<<setbuf>> function is to allocate the buffer.
    1.55 +
    1.56 +WARNINGS
    1.57 +You may only use <<setbuf>> before performing any file operation other
    1.58 +than opening the file.
    1.59 +
    1.60 +If you supply a non-null <[buf]>, you must ensure that the associated
    1.61 +storage continues to be available until you close the stream
    1.62 +identified by <[fp]>.
    1.63 +
    1.64 +RETURNS
    1.65 +<<setbuf>> does not return a result.
    1.66 +
    1.67 +PORTABILITY
    1.68 +Both ANSI C and the System V Interface Definition (Issue 2) require
    1.69 +<<setbuf>>.  However, they differ on the meaning of a <<NULL>> buffer
    1.70 +pointer: the SVID issue 2 specification says that a <<NULL>> buffer
    1.71 +pointer requests unbuffered output.  For maximum portability, avoid
    1.72 +<<NULL>> buffer pointers.
    1.73 +
    1.74 +Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
    1.75 +<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
    1.76 +*/
    1.77 +
    1.78 +#include <stdio.h>
    1.79 +#include "LOCAL.H"
    1.80 +
    1.81 +/**
    1.82 +Change stream buffering.
    1.83 +Changes the buffer used for I/O operations with the specified stream, or,
    1.84 +if the specified buffer is NULL it disables buffering with the stream.
    1.85 +This function should be called once the file associated with the stream 
    1.86 +has been opened but before any input or output operation has been done.
    1.87 +With buffered streams writing operations do not write directly 
    1.88 +to the device associated with them; the data is accumulated in the buffer 
    1.89 +and written to the device as a block.
    1.90 +All buffers are also flushed when program terminates.
    1.91 +@param fp pointer to an open file.
    1.92 +@param buf User allocated buffer. Must have a length of BUFSIZ bytes.
    1.93 +*/
    1.94 +EXPORT_C void setbuf (FILE * fp, char *buf)
    1.95 +{
    1.96 +  (void) setvbuf (fp, buf, buf ? _IOFBF : _IONBF, BUFSIZ);
    1.97 +}