37 lines
884 B
C
37 lines
884 B
C
#if !defined(lint) && defined(SCCSIDS)
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static char sccsid[] = "@(#)setbuf.c 1.1 94/10/31 SMI"; /* from S5R2 2.2 */
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#endif
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/*LINTLIBRARY*/
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#include <stdio.h>
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extern void free();
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extern int isatty();
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extern unsigned char (*_smbuf)[_SBFSIZ];
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extern void _getsmbuf();
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void
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setbuf(iop, buf)
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register FILE *iop;
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char *buf;
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{
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register int fno = fileno(iop); /* file number */
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if(iop->_base != NULL && iop->_flag & _IOMYBUF)
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free((char*)iop->_base);
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iop->_flag &= ~(_IOMYBUF | _IONBF | _IOLBF);
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if((iop->_base = (unsigned char*)buf) == NULL) {
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iop->_flag |= _IONBF; /* file unbuffered except in fastio */
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/* use small buffers reserved for this */
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iop->_base = _smbuf[fno];
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iop->_bufsiz = _SBFSIZ;
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}
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else { /* regular buffered I/O, standard buffer size */
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if (isatty(fno))
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iop->_flag |= _IOLBF;
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iop->_bufsiz = BUFSIZ;
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}
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iop->_ptr = iop->_base;
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iop->_cnt = 0;
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}
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