common.py

"""
obj:string
maxlen:fixed length,HCF127-cmd18
Only the tag 6Bytes or 8Packed ASCII

Attention:The function is only support to tanslate the UPPER the str.if the parameters is lowpper the auto to change upper
"""
def StrToPackedASCII(obj,maxlen):
    a=[]
    result=[]
    objlen=len(obj)
    if objlen > maxlen:
        return False
    for str in obj:
        #trans to ascii and truncate bit 6 and 7,then put into a list,auto to change upper
        if str.islower():
            str = str.upper()
        a.append((ord(str) & 0x3F))    

    a=a+(maxlen-objlen)*[0x20]    
    #print a
    #cal the list length
    q =len(a)/4

    if q:
        for arry in range(q):
            b=[]
            for num in 0,1,2,3:
                b.append((a[num+(arry*4)]))           
            #print b        
            for num in 0,1,2:
                #print bin(b[num]<<(2*(num+1)))
                #print bin(b[num+1]>>(6-2*(num+1)))
                result.append(((b[num]<<(2*(num+1))) | (b[num+1]>>(6-2*(num+1)))) & 0x000000FF)

    return result

def StrToList(string,width):
    return [int(string[x:x+width],16) for x in range(0,len(string),width)]

def ListtoString(list):
    strList = [str(x) for x in list]
    return ','.join(strList)

def StrToAsciiList(str):
    length = len(str)
    result = []
    for i in range(length):
        result.append(ord(str[i]))    
    return result

def LittleToBigEnd(inputlist):
    newlist = []
    for i in range(len(inputlist)):
        newlist.append(inputlist[len(inputlist)-i-1])
    return newlist

def AlignmentWithZero(inputlist,wigth):
    newlist = []
    alignlen = wigth - len(inputlist)
    for i in range(alignlen):
        newlist.append(0)
    return newlist + inputlist

def FillAlign(variable,width):
    if width == 2:
        variable = variable & 0xFFFF
        return [(variable>>8)&0xFF,variable&0xFF]
    elif width == 4:
        variable = variable & 0xFFFFFFFF
        return [(variable>>24)&0xFF,(variable>>16)&0xFF,(variable>>8)&0xFF,variable&0xFF]