70 # define wsdPrng p[0]  in sqlite3_randomness()  macro
72 # define wsdPrng sqlite3Prng  in sqlite3_randomness()  macro
89     wsdPrng.s[0] = 0;  in sqlite3_randomness()
97   if( wsdPrng.s[0]==0 ){  in sqlite3_randomness()
102     memcpy(&wsdPrng.s[0], chacha20_init, 16);  in sqlite3_randomness()
104       memset(&wsdPrng.s[4], 0, 44);  in sqlite3_randomness()
106       sqlite3OsRandomness(pVfs, 44, (char*)&wsdPrng.s[4]);  in sqlite3_randomness()
108     wsdPrng.s[15] = wsdPrng.s[12];  in sqlite3_randomness()
109     wsdPrng.s[12] = 0;  in sqlite3_randomness()
110     wsdPrng.n = 0;  in sqlite3_randomness()
115     if( N<=wsdPrng.n ){  in sqlite3_randomness()
116       memcpy(zBuf, &wsdPrng.out[wsdPrng.n-N], N);  in sqlite3_randomness()
117       wsdPrng.n -= N;  in sqlite3_randomness()
120     if( wsdPrng.n>0 ){  in sqlite3_randomness()
121       memcpy(zBuf, wsdPrng.out, wsdPrng.n);  in sqlite3_randomness()
122       N -= wsdPrng.n;  in sqlite3_randomness()
123       zBuf += wsdPrng.n;  in sqlite3_randomness()
125     wsdPrng.s[12]++;  in sqlite3_randomness()
126     chacha_block((u32*)wsdPrng.out, wsdPrng.s);  in sqlite3_randomness()
127     wsdPrng.n = 64;  in sqlite3_randomness()