common/zmod/adler32.c

15 #define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}
57 uLong ZEXPORT adler32(adler, buf, len)
58     uLong adler;
66     sum2 = (adler >> 16) & 0xffff;
67     adler &= 0xffff;
71         adler += buf[0];
72         if (adler >= BASE)
73             adler -= BASE;
74         sum2 += adler;
77         return adler | (sum2 << 16);
87             adler += *buf++;
88             sum2 += adler;
90         if (adler >= BASE)
91             adler -= BASE;
93         return adler | (sum2 << 16);
104         MOD(adler);
116             adler += *buf++;
117             sum2 += adler;
119         MOD(adler);
124     return adler | (sum2 << 16);