Hex to int conversion (single char)

A pure C function that will do the hex-2-int conversion.
This function takes only a single char.


/** Convert a hex char to an int.

 @param c Single character representing a hexadecimal char.
 @return Returns the integer value.

 */
int hex(char c) {
    if ('0' <= c && c <= '9') return c - '0';
    if ('a' <= c && c <= 'f') return c - 'a' + 10;
    if ('A' <= c && c <= 'F') return c - 'A' + 10;
    return -1;
}


Download the ready-for-use source file (.m) of Hex to int conversion (single char)