source: buchla-68k/orig/IOLIB/GETBUFF.C@ 6099cac

/*
   ============================================================================
        getbuff.c -- Get a buffer for a file for the Buchla 700 C I/O Library
        Version 4 -- 1987-06-24 -- D.N. Lynx Crowe
   ============================================================================
*/

#include "stdio.h"
#include "stddefs.h"

getbuff(ptr)
register FILE *ptr;
{
        char *buffer;

        if (ptr->_buflen EQ 1) {        /* see if we want the small buffer */

                ptr->_buff = &ptr->_bytbuf;
                return;
        }

        if (Stdbufs) {          /* see if we have any standard buffers left */

                buffer = (char *)Stdbufs;
                Stdbufs = *(long **)Stdbufs;

        } else {                /* ... if not, use the small one */

                ptr->_buff = &ptr->_bytbuf;
                ptr->_buflen = 1;
                return;
        }

        ptr->_flags |= _ALLBUF;         /* say we allocated a standard buffer */
        ptr->_buff = buffer;
        return;
}