python-pillow/Pillow
1
1
Fork 0
mirror of https://github.com/python-pillow/Pillow.git synced 2025-06-30 01:43:17 +03:00
Code Issues Packages Projects Releases Wiki Activity

let python do the endian stuff

Browse Source
This commit is contained in:
amoibos 2015-01-11 23:29:47 +01:00 committed by Andrew Murray
parent 9eefe4a7ba
commit aeb1e61aa7
1 changed files with 10 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
PIL/_binary.py
View File

@ -11,6 +11,8 @@
# See the README file for information on usage and redistribution. # See the README file for information on usage and redistribution.
# #
from struct import unpack, pack
if bytes is str: if bytes is str:
def i8(c): def i8(c):
return ord(c) return ord(c)
@ -34,7 +36,7 @@ def i16le(c, o=0):
c: string containing bytes to convert c: string containing bytes to convert
o: offset of bytes to convert in string o: offset of bytes to convert in string
""" """
return i8(c[o]) | (i8(c[o+1]) << 8) return unpack("<H", c[o:o+2])
def i32le(c, o=0): def i32le(c, o=0):
@ -44,33 +46,31 @@ def i32le(c, o=0):
c: string containing bytes to convert c: string containing bytes to convert
o: offset of bytes to convert in string o: offset of bytes to convert in string
""" """
return (i8(c[o]) | (i8(c[o+1]) << 8) | (i8(c[o+2]) << 16) | return unpack("<I", c[o:o+4])
(i8(c[o+3]) << 24))
def i16be(c, o=0): def i16be(c, o=0):
return (i8(c[o]) << 8) | i8(c[o+1]) return unpack(">H", c[o:o+2])
def i32be(c, o=0): def i32be(c, o=0):
return ((i8(c[o]) << 24) | (i8(c[o+1]) << 16) | return unpack(">I", c[o:o+4])
(i8(c[o+2]) << 8) | i8(c[o+3]))
# Output, le = little endian, be = big endian # Output, le = little endian, be = big endian
def o16le(i): def o16le(i):
return o8(i) + o8(i >> 8) return pack("<H", i)
def o32le(i): def o32le(i):
return o8(i) + o8(i >> 8) + o8(i >> 16) + o8(i >> 24) return pack("<I", i)
def o16be(i): def o16be(i):
return o8(i >> 8) + o8(i) return pack(">H", i)
def o32be(i): def o32be(i):
return o8(i >> 24) + o8(i >> 16) + o8(i >> 8) + o8(i) return pack(">I", i)
# End of file # End of file