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Annotation of researchv10no/libc/fio/fiowrite.c, revision 1.1.1.1

1.1       root        1: #define        FIO_IMP
                      2: #include       "fio.h"
                      3: #include       <libc.h>
                      4: 
                      5: long
                      6: Fwrite(fd, addr, nbytes)
                      7:        register char *addr;
                      8:        register long nbytes;
                      9: {
                     10:        register Fbuffer *f;
                     11:        register COUNT n;
                     12:        long nnbytes = nbytes;
                     13: 
                     14:        FIOSET(f, fd);
                     15:        f->flags |= FIO_WRITING;
                     16:        n = &f->buf[FIOBSIZE] - f->next;
                     17:        if(nbytes < n) n = nbytes;
                     18:        memcpy(f->next, addr, n);
                     19:        f->end = (f->next += n);
                     20:        f->offset += n;
                     21:        nbytes -= n;
                     22:        addr += n;
                     23:        if(nbytes){
                     24:                if(F_flush(f, fd))
                     25:                        return(-1L);
                     26:                while(nbytes >= FIOBSIZE){
                     27:                        if(write(fd, addr, (COUNT)FIOBSIZE) != FIOBSIZE)
                     28:                                return(-1L);
                     29:                        addr += FIOBSIZE;
                     30:                        nbytes -= FIOBSIZE;
                     31:                        f->offset += FIOBSIZE;
                     32:                }
                     33:                memcpy(f->buf, addr, (COUNT)(n = nbytes));
                     34:                f->end = f->next = f->buf+n;
                     35:                f->offset += n;
                     36:                f->flags |= FIO_WRITING;
                     37:        }
                     38:        return(nnbytes);
                     39: }

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