HashReturn Update(hashState *state, const BitSequence *data,
DataLength databitlen)
{
DataLength i;
BitSequence nextbit;
for (i = 0;i < databitlen;++i) {
nextbit = (data[i / 8] & mybit[i % 8]) / mybit[i % 8];
updatebit(state,nextbit);
}
return SUCCESS;
}
HashReturn Final(hashState *state, BitSequence *hashval)
{
myuint32 x[2][2][2][2][2];
int i;
/* "append a 1 bit to the input message;" */
updatebit(state,1);
/* "then append the minimum possible number of 0 bits" */
/* "to reach a multiple of 8b bits" */
while (state->blockbits != 0) updatebit(state,0);
/* "the integer 1 is xored into the last state word x_11111" */
state_tox(state->state,x);
x[1][1][1][1][1] ^= 1;
/* "the state is then transformed invertibly through 10r identical rounds" */
for (i = 0;i < 10;++i) rrounds(x);
state_fromx(state->state,x);
/* "output the first h/8 bytes of the state" */
for (i = 0;i < state->hashbitlen / 8;++i) hashval[i] = state->state[i];
return SUCCESS;
}
int
main ()
{
int c;
unsigned int x = 15; // 1111
printf ("x = %d (1111)\n\n", 15);
printf ("x ^ 0 = %d (x)\n", x ^ 0);
printf ("x ^ 1 = %d ~(x)\n", x ^ 15);
printf ("x ^ x = %d (0)\n\n", x ^ x);
printf ("x & 0 = %d (0)\n", x & 0);
printf ("x & 1 = %d (x)\n", x & 15);
printf ("x & x = %d (x)\n\n", x & x);
printf ("x | 0 = %d (x)\n", x | 0);
printf ("x | 1 = %d (1)\n", x | 15);
printf ("x | x = %d (x)\n\n", x | x);
printf ("x = %d (1010)\n", x = 10);
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("set bit %d to 1: %d\n", 2, x = setbit (x, 2));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("clear bit %d to 0: %d\n", 3, x = clearbit (x, 3));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("x = %d (1111)\n", x = 15);
printf ("clear most significant bits through bit %d: %d\n", 2,
x = clearbits_msb (x, 2));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("x = %d (1111)\n", x = 15);
printf ("clear least significant bits through bit %d: %d\n", 1,
x = clearbits_lsb (x, 1));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("x = %d (1111)\n", x = 15);
printf ("update bit %d to 0: %d\n", 2, x = updatebit (x, 2, 0));
printf ("update bit %d to 1: %d\n", 3, x = updatebit (x, 3, 1));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("x = %d (1111)\n", x = 15);
printf ("update bit %d to 0 (C support): %d\n", 2, x = updatebit_c (x, 2, 0));
printf ("update bit %d to 1 (C support): %d\n", 3, x = updatebit_c (x, 3, 1));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
printf ("\n");
printf ("toggle bit %d: %d\n", 1, x = togglebit (x, 1));
printf ("toggle bit %d: %d\n", 3, x = togglebit (x, 3));
for (c = 3; c >= 0; --c)
printf ("get %d bit: %d\n", c, getbit (x, c));
}