John Machin wrote: > > Philippe Martin wrote: >> Philippe Martin wrote: >> >> > Hi, >> > >> > I'm looking for an algo that would convert a list such as: >> > >> > I'm using python to prototype the algo: this will move to C in an >> > embedded system where an int has 16 bits - I do not wish to use any >> > python library. >> > >> > l1 = [1,2,3,4,6,7,8] #represents the decimal number 12345678 >> > l2 = func (l1) >> > # l2 = [0x1, 0x2, 0xD, 0x6, 0x8, 0x7] #represents 0x12D687 >> > >> > >> > Regards, >> > >> > Philippe >> >> Thanks to all, >> >> I decided to attack the problem another way and change the code in device >> #2 so it can now take the output from device #1. >> >> As device #2 only needs to compare, add, and subtract the stuff .. it >> makes my life much simpler. >> > > I'm confused. > 1. Was the original device #1 or #2? > 2. How many bits does the non-original device's C compiler support? > 3. If the original device is device #1, please explain where *it* > obtained an 8-digit decimal number expressed as 1 digit per byte (or > int) ...
Well I don't want to bore you guys more than needed ;-) but: Device #1 has an 8 bit processor - uses a C cross-compiler that does not know anything above a 16 bit integer. I use this device to get information from users "1234...". Device #2 has an 8 bit processor - uses a subset of Java ... that does not know anything above a 16 bit integer. The information gathered in device number #1 must then be sent to device #2 (after being encrypted .... ) to be compared, subtracted or added. The code I already have in device #2 makes the assumption that the information received is an array of bytes of length N which represents an actual value. ex: 0x67DF5 ==> [0x6, 0x7, 0xD, 0xF, 0x5] ... so it can compare/add/subtract values ... and do its job. As a python fan, I figured (back to my initial not very clear request), that I could prototype the above without making any major assumption as to the capabilities of the interpreter. I still believe that to be true. Regards, Philippe -- http://mail.python.org/mailman/listinfo/python-list
