Porting a C array to Python

Question

I'm trying to port this uint8 array to Python:

uint8 formatHwInfo[0x40 * 4] =
{
    0x00,0x00,0x00,0x01,0x08,0x03,0x00,0x01,0x08,0x01,0x00,0x01,0x00,0x00,0x00,0x01,
    0x00,0x00,0x00,0x01,0x10,0x07,0x00,0x00,0x10,0x03,0x00,0x01,0x10,0x03,0x00,0x01,
    0x10,0x0B,0x00,0x01,0x10,0x01,0x00,0x01,0x10,0x03,0x00,0x01,0x10,0x03,0x00,0x01,
    0x10,0x03,0x00,0x01,0x20,0x03,0x00,0x00,0x20,0x07,0x00,0x00,0x20,0x03,0x00,0x00,
    0x20,0x03,0x00,0x01,0x20,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x20,0x03,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x20,0x03,0x00,0x01,0x00,0x00,0x00,0x01,
    0x00,0x00,0x00,0x01,0x20,0x0B,0x00,0x01,0x20,0x0B,0x00,0x01,0x20,0x0B,0x00,0x01,
    0x40,0x05,0x00,0x00,0x40,0x03,0x00,0x00,0x40,0x03,0x00,0x00,0x40,0x03,0x00,0x00,
    0x40,0x03,0x00,0x01,0x00,0x00,0x00,0x00,0x80,0x03,0x00,0x00,0x80,0x03,0x00,0x00,
    0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x00,0x01,0x10,0x01,0x00,0x00,
    0x10,0x01,0x00,0x00,0x20,0x01,0x00,0x00,0x20,0x01,0x00,0x00,0x20,0x01,0x00,0x00,
    0x00,0x01,0x00,0x01,0x00,0x01,0x00,0x00,0x00,0x01,0x00,0x00,0x60,0x01,0x00,0x00,
    0x60,0x01,0x00,0x00,0x40,0x01,0x00,0x01,0x80,0x01,0x00,0x01,0x80,0x01,0x00,0x01,
    0x40,0x01,0x00,0x01,0x80,0x01,0x00,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00

};
 
uint32 surfaceGetBitsPerPixel(uint32 surfaceFormat)
{
    uint32 hwFormat = surfaceFormat & 0x3F;
    uint32 bpp = formatHwInfo[hwFormat * 4];
    return bpp;
}

What is the best way to represent it?

That's not a structure, that's an array. Now think back to your Python tutorial days, what in Python behaves like an array? Something which can be indexed with a zero-based number? Perhaps you should go through some parts of the tutorials again? — Some programmer dude
– Some programmer dude, Commented Aug 14, 2016 at 10:47
If you want to keep it contiguous, you may want to have a look at the array module — StoryTeller - Unslander Monica
– StoryTeller - Unslander Monica, Commented Aug 14, 2016 at 10:50

Daniel · Accepted Answer · 2016-08-14 11:21:47Z

1

Convert the array to a byte string:

formatHwInfo = b"\x00\x00\x00\x01\x08\x03\x00\x01\x08\x01\x00\x01\x00\x00\x00\x01" \
    b"\x00\x00\x00\x01\x10\x07\x00\x00\x10\x03\x00\x01\x10\x03\x00\x01" \
    b"\x10\x0B\x00\x01\x10\x01\x00\x01\x10\x03\x00\x01\x10\x03\x00\x01" \
    b"\x10\x03\x00\x01\x20\x03\x00\x00\x20\x07\x00\x00\x20\x03\x00\x00" \
    b"\x20\x03\x00\x01\x20\x05\x00\x00\x00\x00\x00\x00\x20\x03\x00\x00" \
    b"\x00\x00\x00\x00\x00\x00\x00\x01\x20\x03\x00\x01\x00\x00\x00\x01" \
    b"\x00\x00\x00\x01\x20\x0B\x00\x01\x20\x0B\x00\x01\x20\x0B\x00\x01" \
    b"\x40\x05\x00\x00\x40\x03\x00\x00\x40\x03\x00\x00\x40\x03\x00\x00" \
    b"\x40\x03\x00\x01\x00\x00\x00\x00\x80\x03\x00\x00\x80\x03\x00\x00" \
    b"\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x10\x01\x00\x00" \
    b"\x10\x01\x00\x00\x20\x01\x00\x00\x20\x01\x00\x00\x20\x01\x00\x00" \
    b"\x00\x01\x00\x01\x00\x01\x00\x00\x00\x01\x00\x00\x60\x01\x00\x00" \
    b"\x60\x01\x00\x00\x40\x01\x00\x01\x80\x01\x00\x01\x80\x01\x00\x01" \
    b"\x40\x01\x00\x01\x80\x01\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00" \
    b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
    b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

def surfaceGetBitsPerPixel(surfaceFormat):
    hwFormat = surfaceFormat & 0x3F
    return ord(formatHwInfo[hwFormat*4 + 0])

edited Aug 14, 2016 at 11:21

answered Aug 14, 2016 at 10:51

Daniel

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4 Comments

AboodXD Over a year ago

Cannot mix bytes and nonbytes literals.

Daniel Over a year ago

@AboodXD: oh, yes, every line should contain bytes.

AboodXD Over a year ago

So, what shall I do now? Removing the "b" works, but that means it won't be bytes anymore, right?

AboodXD Over a year ago

TypeError: ord() expected string of length 1, but int found

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