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Annotation of researchv10no/libc/gen/vaxmemmove.c, revision 1.1.1.1

1.1       root        1: #define CHUNK 65532    /* word boundary */
                      2: 
                      3: /* VAX memcpy is OK up to 65535-byte strings */
                      4: 
                      5: extern void *memcpy();
                      6: 
                      7: void *
                      8: memmove(vout, vin, n)
                      9: void *vout, *vin;
                     10: unsigned n;
                     11: {
                     12:        char *out, *in;
                     13:        register unsigned chunk;
                     14:        if(n <= CHUNK || vout < vin)
                     15:                return memcpy(vout, vin, n);
                     16:        chunk = n%CHUNK;
                     17:        out = (char*)vout + n;
                     18:        in = (char*)vin + n;
                     19:        while(memcpy(out-=chunk, in-=chunk, chunk) > vout)
                     20:                chunk = CHUNK;
                     21:        return vout;
                     22: }

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