ASM Community

I am working on a little program that needs to convert long Ascii character strings of Hex (ie/  4A2345FC5E32......)  to a seiries of Binary bytes. 

I can figure out how to do this, but I was wondering if I should be needing to code routines to do these mundane tasks or am I just re-inventing the wheel.  Does windows provide something already designed for this?

TIA
dicky

What I mean is I have a long string of text data like this

4A3236........

which is of course a series of Ascii character codes in memory (cos it's readable on screen)

34h 41h 33h 32h 33h 36h.....................

This is clearly visible anyway if I open the file in Ultredit and select "Hex Edit"

I need to convert this string to actual binary bytes - so 4A is a single byte 4Ah (or 01001010) and not two bytes 34h 41h

I can figure how to convert that for 0-9 I just AND with 0Fh - for A to F use a little look up table and then do each nibble in turn, shift and combine to make a byte value (well that's the way I would do it but hey I'm just a learner.......)

But what I was asking is am I reinventing the wheel here and there is some function that would just convert the whole string for me?

dicky96

PS what happened to the other 95 is a long story  :P

OK thanks for that. 

I don't see the "endian issue" will affect me here as the data is actually the ascii representation of a log of serial data comms between two devices and as such each byte is just a byte, not part of a word or double word etc. 

But cheers for reminding me about it - I still can't figure why Intel did that byte order thing backwards other than it must be something to do with californian grass  :shock:

dicky