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