rshift(3f) [bsd man page]

BIT(3F) 																   BIT(3F)

NAME

       bit - and, or, xor, not, rshift, lshift bitwise functions

SYNOPSIS

       (intrinsic) function and (word1, word2)

       (intrinsic) function or (word1, word2)

       (intrinsic) function xor (word1, word2)

       (intrinsic) function not (word)

       (intrinsic) function rshift (word, nbits)

       (intrinsic) function lshift (word, nbits)

DESCRIPTION

       These bitwise functions are built into the compiler and return the data type of their argument(s).  Their arguments must be integer or log-
       ical values.

       The bitwise combinatorial functions return the bitwise ``and'' (and), ``or'' (or), or ``exclusive or'' (xor) of two operands.  Not  returns
       the bitwise complement of its operand.

       Lshift,	or rshift with a negative nbits, is a logical left shift with no end around carry.  Rshift, or lshift with a negative nbits, is an
       arithmetic right shift with sign extension.  No test is made for a reasonable value of nbits.

       These functions may be used to create a variety of general routines, as in the following statement function definitions:

       integer bitset, bitclr, getbit, word, bitnum

       bitset( word, bitnum ) = or(word,lshift(1,bitnum))
       bitclr( word, bitnum ) = and(word,not(lshift(1,bitnum)))
       getbit( word, bitnum ) = and(rshift(word,bitnum),1)

FILES

       These functions are generated in-line by the f77 compiler.

4.2 Berkeley Distribution					  April 30, 1986							   BIT(3F)

pydhcplib.strlist(3)						     PYDHCPLIB						      pydhcplib.strlist(3)

NAME

       pydhcplib.strlist - Internal type of pydhcplib for lists of bytes processing.

SYNOPSIS

       from pydhcplib.type_hw_addr import hwmac

       a = strlist()
       a = strlist([100,100,10,42,44,26])

DESCRIPTION

       The  class  pydhcplib.strlist  is  an specific type of pydhcplib. It exist in order to simplify processing of raw data from network. When a
       dhcp packet dhcp is received, it's a succession of approximately 300 bytes. Within pydhcplib these data are transformed in an  intermediary
       form  of  type "strlist" in order to facilitate their handling. This intermediary form will eventually be suppressed in the stable versions
       of pydhcplib to speedup the processing time, but backward compatibility will be assured.

       The pydhcplib.strlist class creation argument can be a list of numbers whose value goes from 0?55.

       The pydhcplib.strlist class creation argument can be a string of ASCII character.

METHODS

       The implemented methods in this type are mostly comparison methods (= =, >, etc...)

       else :

       str() convert the address into a printable string type.

       list() convert the address into a list of bytes.

EXAMPLES

       Example program strlist_example.py :

       from pydhcplib.type_strlist import strlist

       word = strlist()
       word1 = strlist("azerty")
       word2 = strlist("qwerty")
       word3 = strlist([97, 122, 101, 114, 116, 121])

       print "a0 : ",word
       print "a1 : ",word1
       print "a2 : ",word2
       print "a3 : ",word3

       if word1 == word2 :
	    print "test 1 : ",word1, "==",word2
       else :
	    print "test 1 : " ,word1, "!=",word2

       if word1 == word3 :
	    print "test 2 : ", word1, "==",word3
       else :
	    print "test 2 : ", word1, "!=",word3

SEE ALSO

       pydhcp(8),  pydhcplib.hwmac(3),	pydhcplib.ipv4(3),  pydhcplib.strlist(3),  pydhcplib.DhcpPacket(3),  pydhcplib.DhcpBasicPacket(3),  pydhc-
       plib.DhcpNetwork(3), pydhcplib.DhcpClient(3), pydhcplib.DhcpRawClient(3), pydhcplib.DhcpDerver(3)

BUGS

       See http://pydhcplib.tuxfamily.org/ for more information.

AUTHOR

       Mathieu Ignacio (mignacio[AT]april.org)

															      pydhcplib.strlist(3)