[Python-checkins] CVS: python/dist/src/Lib/encodings base64_codec.py,NONE,1.1.4.1 cp1140.py,NONE,1.1.4.1 hex_codec.py,NONE,1.1.4.1 quopri_codec.py,NONE,1.1.4.1 rot_13.py,NONE,1.2.4.1 uu_codec.py,NONE,1.1.4.1 zlib_codec.py,NONE,1.1.4.1

Fri, 06 Jul 2001 00:13:53 -0700

Update of /cvsroot/python/python/dist/src/Lib/encodings
In directory usw-pr-cvs1:/tmp/cvs-serv13869

Added Files:
      Tag: descr-branch
	base64_codec.py cp1140.py hex_codec.py quopri_codec.py 
	rot_13.py uu_codec.py zlib_codec.py 
Log Message:
Add the codecs new since the branch was made.

--- NEW FILE: base64_codec.py ---
""" Python 'base64_codec' Codec - base64 content transfer encoding

    Unlike most of the other codecs which target Unicode, this codec
    will return Python string objects for both encode and decode.

    Written by Marc-Andre Lemburg (mal@lemburg.com).

"""
import codecs, base64

### Codec APIs

def base64_encode(input,errors='strict'):

    """ Encodes the object input and returns a tuple (output
        object, length consumed).

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    output = base64.encodestring(input)
    return (output, len(input))

def base64_decode(input,errors='strict'):

    """ Decodes the object input and returns a tuple (output
        object, length consumed).

        input must be an object which provides the bf_getreadbuf
        buffer slot. Python strings, buffer objects and memory
        mapped files are examples of objects providing this slot.

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    output = base64.decodestring(input)
    return (output, len(input))

class Codec(codecs.Codec):

    encode = base64_encode
    decode = base64_decode

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():

    return (base64_encode,base64_decode,StreamReader,StreamWriter)

--- NEW FILE: cp1140.py ---
""" Python Character Mapping Codec for cp1140

Written by Brian Quinlan(brian@sweetapp.com). NO WARRANTY.
"""

import codecs
import copy
import cp037

### Codec APIs

class Codec(codecs.Codec):

    def encode(self,input,errors='strict'):

        return codecs.charmap_encode(input,errors,encoding_map)

    def decode(self,input,errors='strict'):

        return codecs.charmap_decode(input,errors,decoding_map)

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():

    return (Codec().encode,Codec().decode,StreamReader,StreamWriter)

### Decoding Map

decoding_map = copy.copy(cp037.decoding_map)

decoding_map.update({
 	0x009f: 0x20ac # EURO SIGN
})

### Encoding Map

encoding_map = codecs.make_encoding_map(decoding_map)

--- NEW FILE: hex_codec.py ---
""" Python 'hex_codec' Codec - 2-digit hex content transfer encoding

    Unlike most of the other codecs which target Unicode, this codec
    will return Python string objects for both encode and decode.

    Written by Marc-Andre Lemburg (mal@lemburg.com).

"""
import codecs, binascii

### Codec APIs

def hex_encode(input,errors='strict'):

    """ Encodes the object input and returns a tuple (output
        object, length consumed).

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    output = binascii.b2a_hex(input)
    return (output, len(input))

def hex_decode(input,errors='strict'):

    """ Decodes the object input and returns a tuple (output
        object, length consumed).

        input must be an object which provides the bf_getreadbuf
        buffer slot. Python strings, buffer objects and memory
        mapped files are examples of objects providing this slot.

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    output = binascii.a2b_hex(input)
    return (output, len(input))

class Codec(codecs.Codec):

    encode = hex_encode
    decode = hex_decode

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():

    return (hex_encode,hex_decode,StreamReader,StreamWriter)

--- NEW FILE: quopri_codec.py ---
"""Codec for quoted-printable encoding.

Like base64 and rot13, this returns Python strings, not Unicode.
"""

import codecs, quopri
try:
    from cStringIO import StringIO
except ImportError:
    from StringIO import StringIO

def quopri_encode(input, errors='strict'):
    """Encode the input, returning a tuple (output object, length consumed).

    errors defines the error handling to apply. It defaults to
    'strict' handling which is the only currently supported
    error handling for this codec.

    """
    assert errors == 'strict'
    f = StringIO(input)
    g = StringIO()
    quopri.encode(f, g, 1)
    output = g.getvalue()
    return (output, len(input))

def quopri_decode(input, errors='strict'):
    """Decode the input, returning a tuple (output object, length consumed).

    errors defines the error handling to apply. It defaults to
    'strict' handling which is the only currently supported
    error handling for this codec.

    """
    assert errors == 'strict'
    f = StringIO(input)
    g = StringIO()
    quopri.decode(f, g)
    output = g.getvalue()
    return (output, len(input))

class Codec(codecs.Codec):

    encode = quopri_encode
    decode = quopri_decode

class StreamWriter(Codec, codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

# encodings module API

def getregentry():
    return (quopri_encode, quopri_decode, StreamReader, StreamWriter)

--- NEW FILE: rot_13.py ---
#!/usr/local/bin/python2.1
""" Python Character Mapping Codec for ROT13.

    See http://ucsub.colorado.edu/~kominek/rot13/ for details.

    Written by Marc-Andre Lemburg (mal@lemburg.com).

"""#"

import codecs

### Codec APIs

class Codec(codecs.Codec):

    def encode(self,input,errors='strict'):

        return codecs.charmap_encode(input,errors,encoding_map)

    def decode(self,input,errors='strict'):

        return codecs.charmap_decode(input,errors,decoding_map)

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():

    return (Codec().encode,Codec().decode,StreamReader,StreamWriter)

### Decoding Map

decoding_map = codecs.make_identity_dict(range(256))
decoding_map.update({
   0x0041: 0x004e,
   0x0042: 0x004f,
   0x0043: 0x0050,
   0x0044: 0x0051,
   0x0045: 0x0052,
   0x0046: 0x0053,
   0x0047: 0x0054,
   0x0048: 0x0055,
   0x0049: 0x0056,
   0x004a: 0x0057,
   0x004b: 0x0058,
   0x004c: 0x0059,
   0x004d: 0x005a,
   0x004e: 0x0041,
   0x004f: 0x0042,
   0x0050: 0x0043,
   0x0051: 0x0044,
   0x0052: 0x0045,
   0x0053: 0x0046,
   0x0054: 0x0047,
   0x0055: 0x0048,
   0x0056: 0x0049,
   0x0057: 0x004a,
   0x0058: 0x004b,
   0x0059: 0x004c,
   0x005a: 0x004d,
   0x0061: 0x006e,
   0x0062: 0x006f,
   0x0063: 0x0070,
   0x0064: 0x0071,
   0x0065: 0x0072,
   0x0066: 0x0073,
   0x0067: 0x0074,
   0x0068: 0x0075,
   0x0069: 0x0076,
   0x006a: 0x0077,
   0x006b: 0x0078,
   0x006c: 0x0079,
   0x006d: 0x007a,
   0x006e: 0x0061,
   0x006f: 0x0062,
   0x0070: 0x0063,
   0x0071: 0x0064,
   0x0072: 0x0065,
   0x0073: 0x0066,
   0x0074: 0x0067,
   0x0075: 0x0068,
   0x0076: 0x0069,
   0x0077: 0x006a,
   0x0078: 0x006b,
   0x0079: 0x006c,
   0x007a: 0x006d,
})

### Encoding Map

encoding_map = codecs.make_encoding_map(decoding_map)

### Filter API

def rot13(infile, outfile):
    outfile.write(infile.read().encode('rot-13'))

if __name__ == '__main__':
    import sys
    rot13(sys.stdin, sys.stdout)

--- NEW FILE: uu_codec.py ---
""" Python 'uu_codec' Codec - UU content transfer encoding

    Unlike most of the other codecs which target Unicode, this codec
    will return Python string objects for both encode and decode.

    Written by Marc-Andre Lemburg (mal@lemburg.com). Some details were
    adapted from uu.py which was written by Lance Ellinghouse and
    modified by Jack Jansen and Fredrik Lundh.

"""
import codecs, binascii

### Codec APIs

def uu_encode(input,errors='strict',filename='<data>',mode=0666):

    """ Encodes the object input and returns a tuple (output
        object, length consumed).

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    from cStringIO import StringIO
    from binascii import b2a_uu
    infile = StringIO(input)
    outfile = StringIO()
    read = infile.read
    write = outfile.write

    # Encode
    write('begin %o %s\n' % (mode & 0777, filename))
    chunk = read(45)
    while chunk:
        write(b2a_uu(chunk))
        chunk = read(45)
    write(' \nend\n')

    return (outfile.getvalue(), len(input))

def uu_decode(input,errors='strict'):

    """ Decodes the object input and returns a tuple (output
        object, length consumed).

        input must be an object which provides the bf_getreadbuf
        buffer slot. Python strings, buffer objects and memory
        mapped files are examples of objects providing this slot.

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

        Note: filename and file mode information in the input data is
        ignored.

    """
    assert errors == 'strict'
    from cStringIO import StringIO
    from binascii import a2b_uu
    infile = StringIO(input)
    outfile = StringIO()
    readline = infile.readline
    write = outfile.write

    # Find start of encoded data
    while 1:
        s = readline()
        if not s:
            raise ValueError, 'Missing "begin" line in input data'
        if s[:5] == 'begin':
            break

    # Decode
    while 1:
        s = readline()
        if not s or \
           s == 'end\n':
            break
        try:
            data = a2b_uu(s)
        except binascii.Error, v:
            # Workaround for broken uuencoders by /Fredrik Lundh
            nbytes = (((ord(s[0])-32) & 63) * 4 + 5) / 3
            data = a2b_uu(s[:nbytes])
            #sys.stderr.write("Warning: %s\n" % str(v))
        write(data)
    if not s:
        raise ValueError, 'Truncated input data'

    return (outfile.getvalue(), len(input))

class Codec(codecs.Codec):

    encode = uu_encode
    decode = uu_decode

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():

    return (uu_encode,uu_decode,StreamReader,StreamWriter)

--- NEW FILE: zlib_codec.py ---
""" Python 'zlib_codec' Codec - zlib compression encoding

    Unlike most of the other codecs which target Unicode, this codec
    will return Python string objects for both encode and decode.

    Written by Marc-Andre Lemburg (mal@lemburg.com).

"""
import codecs
import zlib # this codec needs the optional zlib module !

### Codec APIs

def zlib_encode(input,errors='strict'):

    """ Encodes the object input and returns a tuple (output
        object, length consumed).

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    output = zlib.compress(input)
    return (output, len(input))

def zlib_decode(input,errors='strict'):

    """ Decodes the object input and returns a tuple (output
        object, length consumed).

        input must be an object which provides the bf_getreadbuf
        buffer slot. Python strings, buffer objects and memory
        mapped files are examples of objects providing this slot.

        errors defines the error handling to apply. It defaults to
        'strict' handling which is the only currently supported
        error handling for this codec.

    """
    assert errors == 'strict'
    output = zlib.decompress(input)
    return (output, len(input))

class Codec(codecs.Codec):

    encode = zlib_encode
    decode = zlib_decode

class StreamWriter(Codec,codecs.StreamWriter):
    pass

class StreamReader(Codec,codecs.StreamReader):
    pass

### encodings module API

def getregentry():

    return (zlib_encode,zlib_decode,StreamReader,StreamWriter)