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C to VB.Net conversion

Hello,

Can anyone explain the following code in C to help me try to translate to VB.Net?

The define part I understand - someone kindly explained this to me yesterday.

Thank you.

#define S1(a) (((a&2)>>1) | ((a&1)<<2))
#define S2(a) (((a&2)>>0) | ((a&1)<<3))
#define S3(a) (((a&2)>>1) | ((a&1)<<2))
#define S4(a) (((a&2)>>0) | ((a&1)<<3))
#define S5(a) (((a&2)>>1) | ((a&1)<<2))
#define S6(a) (((a&2)>>0) | ((a&1)<<3))
#define S7(a) a

static const int x[] = {
S1(2),S1(0),S1(1),S1(1),S1(2),S1(3),S1(3),S1(0),
S1(3),S1(2),S1(2),S1(0),S1(1),S1(1),S1(0),S1(3),
S1(0),S1(3),S1(3),S1(0),S1(2),S1(2),S1(1),S1(1),
S1(2),S1(2),S1(0),S1(3),S1(1),S1(1),S1(3),S1(0)
};
static const int x[] = {
S2(3),S2(1),S2(0),S2(2),S2(2),S2(3),S2(3),S2(0),
S2(1),S2(3),S2(2),S2(1),S2(0),S2(0),S2(1),S2(2),
S2(3),S2(1),S2(0),S2(3),S2(3),S2(2),S2(0),S2(2),
S2(0),S2(0),S2(1),S2(2),S2(2),S2(1),S2(3),S2(1)
};
static const int x[] = {
S3(2),S3(0),S3(1),S3(2),S3(2),S3(3),S3(3),S3(1),
S3(1),S3(1),S3(0),S3(3),S3(3),S3(0),S3(2),S3(0),
S3(1),S3(3),S3(0),S3(1),S3(3),S3(0),S3(2),S3(2),
S3(2),S3(0),S3(1),S3(2),S3(0),S3(3),S3(3),S3(1)
};
static const int x[] = {
S4(3),S4(1),S4(2),S4(3),S4(0),S4(2),S4(1),S4(2),
S4(1),S4(2),S4(0),S4(1),S4(3),S4(0),S4(0),S4(3),
S4(1),S4(0),S4(3),S4(1),S4(2),S4(3),S4(0),S4(3),
S4(0),S4(3),S4(2),S4(0),S4(1),S4(2),S4(2),S4(1)
};
static const int x[] = {
S5(2),S5(0),S5(0),S5(1),S5(3),S5(2),S5(3),S5(2),
S5(0),S5(1),S5(3),S5(3),S5(1),S5(0),S5(2),S5(1),
S5(2),S5(3),S5(2),S5(0),S5(0),S5(3),S5(1),S5(1),
S5(1),S5(0),S5(3),S5(2),S5(3),S5(1),S5(0),S5(2)
};
static const int x[] = {
S6(0),S6(1),S6(2),S6(3),S6(1),S6(2),S6(2),S6(0),
S6(0),S6(1),S6(3),S6(0),S6(2),S6(3),S6(1),S6(3),
S6(2),S6(3),S6(0),S6(2),S6(3),S6(0),S6(1),S6(1),
S6(2),S6(1),S6(1),S6(2),S6(0),S6(3),S6(3),S6(0)
};
static const int x[] = {
S7(0),S7(3),S7(2),S7(2),S7(3),S7(0),S7(0),S7(1),
S7(3),S7(0),S7(1),S7(3),S7(1),S7(2),S7(2),S7(1),
S7(1),S7(0),S7(3),S7(3),S7(0),S7(1),S7(1),S7(2),
S7(2),S7(3),S7(1),S7(0),S7(2),S7(3),S7(0),S7(2)
};

ASKER CERTIFIED SOLUTION

Kent Olsen

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Kent Olsen

Err... The last example should be:

static const int x[] = {
2>>1, 0, 1<<2, 1<<2, 2>>1, 3>>1, 3>>1, 0,

Which is:

static const int x[] = {
1, 0, 4, 4, 1, 1, 1, 0,

Kent

IAJWDDIY

ASKER

Hi Kent,

The static const int x[] bit, is that an array?

Thank you.

momi_sabag

yep
that is an array on int values
the number of elemnts in the array is determined by the number of values in the initiation (32 in your case)
remember that c array are zero based

IAJWDDIY

ASKER

Kent,

Thank you.