hex,string,int_bits transfer

hex_str_transfer.py

def hexstr(s):
    """    
    turns ABCD
    into 
    41424344
    """
    tmp=[]
    for c in s:
        tmp+=["%2.2x"%ord(c)]
    return "".join(tmp)

def str2int_bits(bits, s):
    nchars = bits / 8
    r = 0
    for i in range(0, nchars):
        #print "%d = %x << %d" % (ord(s[i]) << 8*i, ord(s[i]), 8*i)
        r += ord(s[nchars-i-1]) << 8*i

    return r

def int2hexs(myint):
    str=""
    a=int(myint % 256)
    myint=myint >> 8
    b=int(myint % 256)
    myint=myint >> 8
    c=int(myint % 256)
    myint=myint >> 8
    d=int(myint % 256)

    str+="%c%c%c%c" % (d,c,b,a)
    return str

def short2hexs(halfword):
    str=""
    a = halfword & 0xff
    b = halfword/256 & 0xff
    str+="%c%c" % (b,a)
    return str