If the sizes of your infos is fixed you can do something like this: info5 = packet & 0x1FF; info4 = (packet >> 9) & 0x1F; .. and so on note that I am masking out unwanted parts of the 32 bit packet using an all 1s bit pattern 0x1FF : 1 1111 1111, 0x1F : 1 1111. in case of info4, I first need to move the value 9 bits to the right so that 5 bits of info4 form the LSB. You can form the packet similarly, unsigned int packet = ((info1 & 0x3F) << 26) | ((info2 & 0xF) << 22) ... HTH packet is your single 32-bit integer which has all these infos encoded. On Wed, Aug 26, 2009 at 6:02 PM, Randi Botse<nightdecoder@xxxxxxxxx> wrote: > Hi, I'm beginner C programmer, i have a problem, i want to store some > information in a integer, a integer will be 32 bit on my machine, i > want to have as follow: > > 6 bit (information 1) MSB > 4 bit (information 2) > 8 bit (information 3) > 5 bit (information 4) > 9 bit (information 5) LSB > > For example i set the informations as follow (in decimal): > > information 1 = 43 or 101011 > information 2 = 11 or 1011 > information 3 = 120 or 1111000 > information 3 = 30 or 11110 > information 4 = 418 or 110100010 > > if i join all informations i should get a 32 bit integer valued > 2935782212 or 01010111011111100011110110100010, then my problem is how > to retrieve these informations on bit operation? i want to know what's > the value of information-2 or information-3, etc directly. And, is > there any good way to join these informations to be an 32 bit integer? > > at this time i convert the 32bit integer into binary string, process > it's with array segment to get all informations then convert them to > integer, > to build the 32bit integer, i join all information value into binary > string (yes, 32 bit of char ;p) join all of them then convert to > integer. > > I know my way is sucks and too far away from COOL thing ;p, i think > there are cool way to do this!. > > Thanks before! > -- > To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Uday http://soundc.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
