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# # The Python Imaging Library. # $Id$ # # Binary input/output support routines. # # Copyright (c) 1997-2003 by Secret Labs AB # Copyright (c) 1995-2003 by Fredrik Lundh # Copyright (c) 2012 by Brian Crowell # # See the README file for information on usage and redistribution. #
from struct import unpack_from, pack from ._util import py3
if py3: def i8(c): return c if c.__class__ is int else c[0]
def o8(i): return bytes((i & 255,)) else: def i8(c): return ord(c)
def o8(i): return chr(i & 255)
# Input, le = little endian, be = big endian def i16le(c, o=0): """ Converts a 2-bytes (16 bits) string to an unsigned integer.
c: string containing bytes to convert o: offset of bytes to convert in string """ return unpack_from("<H", c, o)[0]
def si16le(c, o=0): """ Converts a 2-bytes (16 bits) string to a signed integer.
c: string containing bytes to convert o: offset of bytes to convert in string """ return unpack_from("<h", c, o)[0]
def i32le(c, o=0): """ Converts a 4-bytes (32 bits) string to an unsigned integer.
c: string containing bytes to convert o: offset of bytes to convert in string """ return unpack_from("<I", c, o)[0]
def si32le(c, o=0): """ Converts a 4-bytes (32 bits) string to a signed integer.
c: string containing bytes to convert o: offset of bytes to convert in string """ return unpack_from("<i", c, o)[0]
def i16be(c, o=0): return unpack_from(">H", c, o)[0]
def i32be(c, o=0): return unpack_from(">I", c, o)[0]
# Output, le = little endian, be = big endian def o16le(i): return pack("<H", i)
def o32le(i): return pack("<I", i)
def o16be(i): return pack(">H", i)
def o32be(i): return pack(">I", i) |