4.3BSD - /usr/src/new/cpm/src/cfillbuf.c

   1: /*	cfillbuf.c	1.6	83/05/13	*/
   2: 
   3: #include <stdio.h>
   4: #include "cpmio.h"
   5: #include "cpmfio.h"
   6: 
   7: c_fillbuf(fptr)
   8:     register C_FILE *fptr;
   9: {
  10: 
  11:     int getnext(), nsect;
  12: 
  13:     if (++fptr->c_blk == 16)
  14:         if (fptr->c_dirp->blkcnt ==  (char) 0x80) {
  15:             /* find next extent (if it exists) */
  16:             if (getnext(fptr) == NULL)
  17:                 return (EOF);
  18:         }
  19:     else
  20:         return (EOF);
  21:     nsect = (fptr->c_seccnt>blksiz/seclth) ? blksiz/seclth : fptr->c_seccnt;
  22:     if (nsect == 0)
  23:         return (EOF);
  24:     fptr->c_seccnt -= nsect;
  25:     if (getblock(0xff & ((int)fptr->c_dirp->pointers[fptr->c_blk]),
  26:          fptr->c_base, nsect) == EOF)
  27:         return (EOF);
  28:     fptr->c_buf = fptr->c_base;
  29:     fptr->c_cnt = nsect*seclth -1;
  30:     return (*fptr->c_buf++&0xff);
  31: }

Defined functions