Initial commit

.venv/lib/python3.9/site-packages/PIL/_binary.py

@@ -0,0 +1,92 @@
+#
+# 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.
+#
+
+
+"""Binary input/output support routines."""
+
+
+from struct import pack, unpack_from
+
+
+def i8(c):
+    return c if c.__class__ is int else c[0]
+
+
+def o8(i):
+    return bytes((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.
+
+    :param c: string containing bytes to convert
+    :param 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.
+
+    :param c: string containing bytes to convert
+    :param 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.
+
+    :param c: string containing bytes to convert
+    :param 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.
+
+    :param c: string containing bytes to convert
+    :param 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)