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QuestionConverting unsigned short int to its hex representation Pin
yeah10003-Nov-09 1:58
yeah10003-Nov-09 1:58 
Hello,
i ran into a bit of trouble when converting unsigned short int to its hex string representation. What i need is a two byte representation with a space between the bytes (e.g "0f 43" for 3907 of "00 ff" for 255)

The solution i came up with is the following:

unsigned char* CreateHexValues(unsigned short int inValue)
{
char Hex[5] = {0, 0, 0, 0, 0};
_itoa_s(inValue, Hex, 16);

unsigned char *hexOut = new unsigned char[5];
hexOut[2] = ' ';

if(inValue <= 15)
{
hexOut[0] = '0';
hexOut[1] = '0';
hexOut[3] = '0';
hexOut[4] = Hex[0];
}
else if(inValue > 15 && inValue <= 255)
{
hexOut[0] = '0';
hexOut[1] = '0';
hexOut[3] = Hex[0];
hexOut[4] = Hex[1];
}
else if(inValue > 255 && inValue <= 4095)
{
hexOut[0] = '0';
hexOut[1] = Hex[0];
hexOut[3] = Hex[1];
hexOut[4] = Hex[2];
}
else if (inValue > 4096)
{
hexOut[0] = Hex[0];
hexOut[1] = Hex[1];
hexOut[3] = Hex[2];
hexOut[4] = Hex[3];
}
return hexOut;
}
So my question is: is there a better/quicker way to do that? The problem is that when i convert it with _itoa_s it could be in the following formats: f43, 43, 3 (depending on inValue) without any zeros in front of it. Another problem is with the Hex[5] array, my inValue can never be bigger than 65535, but for some reason i get an assertion failure when i change its size to Hex[4] which should be enough for 65535. Why could that be?

Thanks for all replies in advance
AnswerRe: Converting unsigned short int to its hex representation Pin
Richard MacCutchan3-Nov-09 2:06
mveRichard MacCutchan3-Nov-09 2:06 
AnswerRe: Converting unsigned short int to its hex representation [fixed: thanks to David] Pin
CPallini3-Nov-09 2:30
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QuestionRe: Converting unsigned short int to its hex representation Pin
David Crow3-Nov-09 3:16
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AnswerRe: Converting unsigned short int to its hex representation Pin
CPallini3-Nov-09 3:29
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AnswerRe: Converting unsigned short int to its hex representation Pin
yeah10003-Nov-09 4:41
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AnswerRe: Converting unsigned short int to its hex representation Pin
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Questionc++ code Pin
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GeneralOT Pin
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