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Annotation of researchv10no/cmd/odist/opkg/mkcsum.c, revision 1.1.1.1

1.1       root        1: #include "seal.h"
                      2: 
                      3: unsigned long
                      4: mkcsum (unsigned long csum, char *start, char *limit)
                      5: {
                      6:        register int c;
                      7: 
                      8:        while (start < limit) {
                      9:                c = (unsigned char) *start++;
                     10:                if (csum & 1)
                     11:                        csum = (csum >> 1) | CSHIBIT;
                     12:                else
                     13: 
                     14:                        csum >>= 1;
                     15:                csum += c;
                     16:                csum &= CSMASK;
                     17:        }
                     18:        return csum;
                     19: }

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