70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/***
|
|
*setbuf.c - give new file buffer
|
|
*
|
|
* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* defines setbuf() - given a buffer to a stream or make it unbuffered
|
|
*
|
|
*Revision History:
|
|
* 09-19-83 RN initial version
|
|
* 09-28-87 JCR Corrected _iob2 indexing (now uses _iob_index() macro).
|
|
* 11-02-87 JCR Re-wrote to use setvbuf()
|
|
* 12-11-87 JCR Added "_LOAD_DS" to declaration
|
|
* 05-27-88 PHG Merged DLL and normal versions
|
|
* 02-15-90 GJF Fixed copyright and indents
|
|
* 03-19-90 GJF Replaced _LOAD_DS with _CALLTYPE1 and added #include
|
|
* <cruntime.h>.
|
|
* 07-23-90 SBM Replaced <assertm.h> by <assert.h>
|
|
* 10-03-90 GJF New-style function declarator.
|
|
* 04-06-93 SKS Replace _CRTAPI* with __cdecl
|
|
* 05-11-93 GJF Added comments.
|
|
* 02-06-94 CFW assert -> _ASSERTE.
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <stdio.h>
|
|
#include <dbgint.h>
|
|
|
|
/***
|
|
*void setbuf(stream, buffer) - give a buffer to a stream
|
|
*
|
|
*Purpose:
|
|
* Allow user to assign his/her own buffer to a stream.
|
|
* if buffer is not NULL, it must be BUFSIZ in length.
|
|
* if buffer is NULL, stream will be unbuffered.
|
|
*
|
|
* Since setbuf()'s functionality is a subset of setvbuf(), simply
|
|
* call the latter routine to do the actual work.
|
|
*
|
|
* NOTE: For compatibility reasons, setbuf() uses BUFSIZ as the
|
|
* buffer size rather than _INTERNAL_BUFSIZ. The reason for this,
|
|
* and for the two BUFSIZ constants, is to allow stdio to use larger
|
|
* buffers without breaking (already) compiled code.
|
|
*
|
|
*Entry:
|
|
* FILE *stream - stream to be buffered or unbuffered
|
|
* char *buffer - buffer of size BUFSIZ or NULL
|
|
*
|
|
*Exit:
|
|
* None.
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
void __cdecl setbuf (
|
|
FILE *stream,
|
|
char *buffer
|
|
)
|
|
{
|
|
_ASSERTE(stream != NULL);
|
|
|
|
if (buffer == NULL)
|
|
setvbuf(stream, NULL, _IONBF, 0);
|
|
else
|
|
setvbuf(stream, buffer, _IOFBF, BUFSIZ);
|
|
|
|
}
|