e_rsatz projects: (![[info]](http://l-stat.livejournal.com/img/userinfo.gif){kind=small} e_rsatz) wrote,@ 2005-08-19 18:24:00 |
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| Entry tags: | python |
The Python I like - A CDR streams read method
Here below a function decoding IIOP's CDR streams:
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def ACE_read(typeLength): if typeLength: # scalar (char:1, int:4, ...) def sclRead(buf, index, big=1): alignedIndex=(index + (typeLength-1)) & ~(typeLength-1) if alignedIndex + typeLength > len(buf): return None, None, False endIndex=alignedIndex + typeLength return ordn(big)(buf[alignedIndex:endIndex]), endIndex, True return sclRead else: # string def strRead(buf,index,length,big=1): endIndex =index + length if endIndex > len(buf): return None, None, False return buf[index:endIndex], endIndex, True return strRead |
I like nested functions...
And I like functions returning tuples !
Usage examples:
# reads a 13 bytes string and actualize index
__aString, index, ok = ACE_read(0)(buffer, index, 13)
if not ok: doSomething()
# reads an aligned-4-byte-long integer located somewhere by index
__anInteger, index, ok = ACE_read(4)(buffer, index)
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