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55 lines
1.2 KiB
55 lines
1.2 KiB
/* This is file SETVBUF.C */
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/*
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** Copyright (C) 1991 DJ Delorie, 24 Kirsten Ave, Rochester NH 03867-2954
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**
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** This file is distributed under the terms listed in the document
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** "copying.dj", available from DJ Delorie at the address above.
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** A copy of "copying.dj" should accompany this file; if not, a copy
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** should be available from where this file was obtained. This file
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** may not be distributed without a verbatim copy of "copying.dj".
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**
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** This file is distributed WITHOUT ANY WARRANTY; without even the implied
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** warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <stdio.h>
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#ifdef linux
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#include <stdlib.h>
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#endif
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int setvbuf(FILE *f, char *buf, int type, int len)
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{
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int mine=0;
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if (!f)
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return -1;
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fflush(f);
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switch (type)
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{
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case _IOFBF:
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case _IOLBF:
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if (len <= 0)
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return -1;
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if (buf == 0)
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{
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buf = (char *)malloc(len);
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if (buf == 0)
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return -1;
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mine = 1;
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}
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setbuffer(f, NULL, 0);
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f->_flag &= ~_IONBF;
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f->_flag |= type;
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if (mine)
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f->_flag |= _IOMYBUF;
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f->_base = buf;
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f->_bufsiz = len;
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return 0;
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case _IONBF:
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setbuffer(f, NULL, 0);
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return 0;
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default:
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return -1;
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}
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}
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