Big and Little endian question

Big and Little endian question

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Big and Little endian question
Tag : cpp , By : Saurabh
Date : January 02 2021, 06:48 AM

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pack/unpack - litle endian - 64bit - question

Tag : perl , By : Hugo
Date : March 29 2020, 07:55 AM
Hope that helps
say unpack("B*", pack( "Q>", $var ));

a question from careercup about endian

Tag : c , By : hammer_1968
Date : March 29 2020, 07:55 AM
it helps some times It's just taking the address of word, casting it to a char pointer, and putting it in byte.
At that point, byte will point to the first byte of 2-byte word, and the value of that byte (1 or 0) will tell you if you're on a big or little endian machine.

Best way to convert a Little Endian four byte long integer to Big Endian, or vice versa in x86 Assembly

Tag : assembly , By : T11M
Date : March 29 2020, 07:55 AM
Any of those help For 80486 and later, there's an instruction called bswap that swaps bytes in a dword.
For older 80386 CPUs I'd be tempted to use something like this:
                     ;eax = 0xAABBCCDD
    xchg ah,al       ;eax = 0xAABBDDCC
    rol eax,16       ;eax = 0xDDCCAABB
    xchg ah,al       ;eax = 0xDDCCBBAA
                     ;dx:ax = 0xAABBCCDD
                     ;ax:dx = 0xCCDDAABB
    xchg ah,al       ;ax:dx = 0xDDCCAABB
    xchg dh,dl       ;ax:dx = 0xDDCCBBAA

Does exist any way to convert TIFF image from little-endian byte order to big-endian?

Tag : java , By : Topher Cyll
Date : March 29 2020, 07:55 AM
like below fixes the issue I have .dll library which use tiff image in big-endian (MM) byte order, but image scanner create image in little-endian (II) byte order. , You can do that with ImageMagick like this:
convert image.tif -define tiff:endian=msb msb.tif
xxd image.tif| more
0000000: 4949 2a00 0800 0600 ffff 0000 0000 ffff  II*.............
xxd msb.tif| more
0000000: 4d4d 002a 0006 0008 ffff 0000 0000 ffff  MM.*............

Printing a number in Binary always prints in Normal form(BIG Endian) even when my computer is Little Endian?

Tag : c , By : taviso
Date : March 29 2020, 07:55 AM
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