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Annotation of 43BSD/contrib/cpm/src/cfillbuf.c, revision 1.1.1.1

1.1       root        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: }

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