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