Now, while I don't typically put much salt into the typical government conspiracy paranoia, this stuff about swine flu vaccinations containing live avian flu is... concerning. Add in the fact that Obama announced swine flu a national emergency just recently, despite mounting skepticism about its seriousness. Remember, take this stuff with a grain of salt, but still, be a little concerned:

## Wednesday, November 11, 2009

## Tuesday, November 10, 2009

### Function to Print A Value's Bit Representation in Hex (by Casting as an Unsigned Int) in C

void printHex(int someInt)

{

unsigned int temp;

for(temp = (someInt); temp != 0; temp /= 16)

if(temp % 16 <>= 0)

printf("%d", temp % 16);

else

{

switch(temp % 16)

{

case 10:

putchar('A');

break;

case 11:

putchar('B');

break;

case 12:

putchar('C');

break;

case 13:

putchar('D');

break;

case 14:

putchar('E');

break;

case 15:

putchar('F');

break;

}

}

}

{

unsigned int temp;

for(temp = (someInt); temp != 0; temp /= 16)

if(temp % 16 <>= 0)

printf("%d", temp % 16);

else

{

switch(temp % 16)

{

case 10:

putchar('A');

break;

case 11:

putchar('B');

break;

case 12:

putchar('C');

break;

case 13:

putchar('D');

break;

case 14:

putchar('E');

break;

case 15:

putchar('F');

break;

}

}

}

Labels:
C,
Computer Science

### Function for Printing An Item in Binary (Will Print in Little Endian) in C

void printBits(int someInt)

{

int counter, mask;

//Loop through the bits 1 by 1, putting out a 1 for every 1 encountered and a 0 for every 1 encountered

for(counter=1, mask=1; counter <= sizeof(int) * CHAR_BIT; counter++, mask*=2)

{

putchar(((someInt & mask)==0) ? '0' : '1');

//Put spaces between every 8 bits

if(counter != 0 && counter % (CHAR_BIT) == 0 && counter <= (sizeof(int) * CHAR_BIT))

putchar(' ');

}

printf("\n\n");

}

{

int counter, mask;

//Loop through the bits 1 by 1, putting out a 1 for every 1 encountered and a 0 for every 1 encountered

for(counter=1, mask=1; counter <= sizeof(int) * CHAR_BIT; counter++, mask*=2)

{

putchar(((someInt & mask)==0) ? '0' : '1');

//Put spaces between every 8 bits

if(counter != 0 && counter % (CHAR_BIT) == 0 && counter <= (sizeof(int) * CHAR_BIT))

putchar(' ');

}

printf("\n\n");

}

Labels:
C,
Computer Science

### Function for Finding the Modulo of A Polynomial Without Having to Worry About Exponents

function modulo = modWOExp(a, n, z)

modulo = 1;

x = intDivision(a, z);

while n > 0

mod2 = intDivision(n, 2);

if mod2(2) == 1

modulo = modulo * x(2);

modZ = intDivision(modulo, z);

modulo = modZ(2);

end

mod2(1) = x(2) * x(2);

x = intDivision(mod2(1), z);

someTemp = intdivision(n, 2);

n = someTemp(1);

end

Labels:
Computer Science,
MATLAB

### GCDPlus Function (Returns s & t for function gcd = sa + tb)

function sAndT = gcdPlus(a, b)

if a < b

temp = a;

a = b;

b = temp;

end

if b == 0

sAndT(1) = 1;

sAndT(2) = 0;

return;

end

q = intDivision(a, b);

r = q(2);

sAndTPrime = gcdPlus(b, r);

sAndT(1) = sAndTPrime(2);

sAndT(2) = sAndTPrime(1) - sAndTPrime(2) * q(1);

return;

Labels:
Computer Science,
MATLAB

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