FAST binary to hex string conversion

b..

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

FAST binary to hex string conversion

Looking for a *very fast* BASM routine to convert an integer
to a hexadecimal string. Searched web but came up dry.

Any pointers appreciated.

Frederic Bonro

Delphi Developer

Wed, 18 Jun 1902 08:00:00 GMT

Re:FAST binary to hex string conversion

Quote

b...@unlvx.edu wrote:
> Looking for a *very fast* BASM routine to convert an integer
> to a hexadecimal string. Searched web but came up dry.

No idea if it's fast enough, but try this:

const
HexChars : array[0..$F] of char = '0123456789ABCDEF';

function Hex(i: integer): string; assembler;
asm
les di, @result
lea bx, HexChars
mov byte ptr es:[di], 4
inc di
mov cl, 12
mov dx, i
@@1:
mov ax, dx
shr ax, cl
and al, 0Fh
xlat
mov es:[di], al
inc di
sub cl, 4
jns @@1
end;

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