Remove unused pythonic eix parser implementation

1 files changed, 0 insertions, 416 deletions

diff --git a/portato/eix/py_parser.py b/portato/eix/py_parser.py
deleted file mode 100644
index 231c206..0000000
--- a/portato/eix/py_parser.py
+++ /dev/null
@@ -1,416 +0,0 @@
-# -*- coding: utf-8 -*-
-#
-# File: portato/eix/parser.py
-# This file is part of the Portato-Project, a graphical portage-frontend.
-#
-# Copyright (C) 2006-2010 René 'Necoro' Neumann
-# This is free software.  You may redistribute copies of it under the terms of
-# the GNU General Public License version 2.
-# There is NO WARRANTY, to the extent permitted by law.
-#
-# Written by René 'Necoro' Neumann <necoro@necoro.net>
-
-"""
-The cache file supports different types of data.
-In this module (nearly) all of these types have a corresponding function.
-
-For the exact way all the functions work, have a look at the eix format description.
-"""
-
-from __future__ import absolute_import, with_statement
-__docformat__ = "restructuredtext"
-
-import os
-import struct
-from functools import partial
-
-from ..helper import debug
-from .exceptions import EndOfFileException
-
-#
-# Helper
-#
-
-def _get_bytes (file, length, expect_list = False):
-    """
-    Return a number of bytes.
-    
-    :Parameters:
-
-        file : file
-            The file to read from.
-
-        length : int
-            The number of bytes to read.
-
-        expect_list : bool
-            In case ``length`` is 1, only a single byte is returned. If ``expect_list`` is true, then a list is also returned in this case.
-
-    :rtype: int or int[]
-    :raises EndOfFileException: if EOF is reached during execution
-    """
-
-    s = file.read(length)
-
-    if len(s) != length:
-        raise EndOfFileException, file.name
-
-    if length == 1 and not expect_list:
-        return ord(s) # is faster than unpack and we have a scalar
-    else:
-        return struct.unpack("%sB" % length, s)
-
-#
-# Base Types
-#
-
-def number (file, skip = False):
-    """
-    Returns a number.
-
-    :Parameters:
-
-        file : file
-            The file to read from.
-
-        skip : bool
-            Do not return the actual value, but just skip to the next datum.
-
-    :rtype: int
-    """
-
-    n = _get_bytes(file, 1)
-
-    if n < 0xFF:
-        value = n
-    else:
-        count = 0
-
-        while (n == 0xFF):
-            count += 1
-            n = _get_bytes(file, 1)
-
-        if n == 0:
-            n = 0xFF # 0xFF is encoded as 0xFF 0x00
-            count -= 1
-        
-        value = n << (count*8)
-
-        if count > 0:
-
-            if skip:
-                file.seek(count, os.SEEK_CUR)
-                return
-            
-            else:
-                rest = _get_bytes(file, count, expect_list = True)
-
-                for i, r in enumerate(rest):
-                    value += r << ((count - i - 1)*8)
-        
-    return value
-
-def vector (file, get_type, skip = False, nelems = None):
-    """
-    Returns a vector of elements.
-
-    :Parameters:
-
-        file : file
-            The file to read from.
-
-        get_type : function(file, bool)
-            The function determining type of the elements.
-
-        skip : bool
-            Do not return the actual value, but just skip to the next datum.
-
-        nelems : int
-            Normally the eix-Vector has the number of elements as the first argument.
-            If for some reason this is not the case, you can pass it in here.
-
-    :rtype: list
-    """
-
-    if nelems is None:
-        nelems = number(file)
-    
-    if skip:
-        for i in range(nelems):
-            get_type(file, skip = True)
-    else:
-        return [get_type(file) for i in range(nelems)]
-
-def typed_vector(type, nelems = None):
-    """
-    Shortcut to create a function for a special type of vector.
-
-    :Parameters:
-
-        type : function(file, bool)
-            The function determining type of the elements.
-
-        nelems : int
-            Normally the eix-Vector has the number of elements as the first argument.
-            If for some reason this is not the case, you can pass it in here.
-            Do not return the actual value, but just skip to the next datum.
-
-    :rtype: function(file, bool)
-    :see: `vector`
-    """
-
-    if nelems is None:
-        return partial(vector, get_type = type)
-    else:
-        return partial(vector, get_type = type, nelems = nelems)
-
-def string (file, skip = False):
-    """
-    Returns a string.
-
-    :Parameters:
-
-        file : file
-            The file to read from.
-
-        skip : bool
-            Do not return the actual value, but just skip to the next datum.
-
-    :rtype: str
-    """
-    nelems = number(file)
-
-    if skip:
-        file.seek(nelems, os.SEEK_CUR)
-        return
-    else:
-        s = file.read(nelems)
-
-    if len(s) != nelems:
-        raise EndOfFileException, file.name
-
-    return s
-
-#
-# Complex Types
-#
-
-class LazyElement (object):
-    """
-    This class models a value in the cache, which is only read on access.
-
-    If not accessed directly, only the position inside the file is stored.
-    """
-    __slots__ = ("file", "get_type", "_value", "pos")
-    
-    def __init__ (self, get_type, file):
-        """
-        :Parameters:
-
-            get_type : function(file, bool)
-                The function determining type of the elements.
-
-            file : file
-                The file to read from.
-        """
-
-        self.file = file
-        self.get_type = get_type
-        self._value = None
-
-        self.pos = file.tell()
-        get_type(file, skip=True) # skip it for the moment
-
-    @property
-    def value (self):
-        """
-        The value of the element.
-        """
-
-        if self._value is None:
-            old_pos = self.file.tell()
-            self.file.seek(self.pos, os.SEEK_SET)
-            self._value = self.get_type(self.file, skip = False)
-            self.file.seek(old_pos, os.SEEK_SET)
-        
-        return self._value
-
-    def __call__ (self):
-        """
-        Convenience function. Also returns the value.
-        """
-        return self.value
-
-class overlay (object):
-    """
-    Represents an overlay object.
-
-    :IVariables:
-
-        path : `LazyElement` <string>
-            The path to the overlay
-
-        label : `LazyElement` <string>
-            The label/name of the overlay
-    """
-    __slots__ = ("path", "label")
-
-    def __init__ (self, file, skip = False):
-        """
-        :Parameters:
-
-            file : file
-                The file to read from.
-
-            skip : bool
-                Do not return the actual value, but just skip to the next datum.
-        """
-        
-        self.path = LazyElement(string, file)
-        self.label = LazyElement(string, file)
-
-class header (object):
-    """
-    Represents the header of the cache.
-
-    :IVariables:
-
-        version : `LazyElement` <int>
-            The version of the cache file.
-
-        ncats : `LazyElement` <int>
-            The number of categories.
-
-        overlays : `LazyElement` <`overlay` []>
-            The list of overlays.
-
-        provide : `LazyElement` <string[]>
-            A list of "PROVIDE" values.
-
-        licenses : `LazyElement` <string[]>
-            The list of licenses.
-
-        keywords : `LazyElement` <string[]>
-            The list of keywords.
-        
-        useflags : `LazyElement` <string[]>
-            The list of useflags.
-        
-        slots : `LazyElement` <string[]>
-            The list of slots different from "0".
-
-        sets : `LazyElement` <string[]>
-            The names of world sets are the names (without leading @) of the world sets stored in /var/lib/portage/world_sets.
-            If SAVE_WORLD=false, the list is empty.
-    """
-    __slots__ = ("version", "ncats", "overlays", "provide",
-            "licenses", "keywords", "useflags", "slots", "sets")
-
-    def __init__ (self, file, skip = False):
-        """
-        :Parameters:
-
-            file : file
-                The file to read from.
-
-            skip : bool
-                Do not return the actual value, but just skip to the next datum.
-        """
-        def LE (t):
-            return LazyElement(t, file)
-
-        self.version = LE(number)
-        self.ncats = LE(number)
-        self.overlays = LE(typed_vector(overlay))
-        self.provide = LE(typed_vector(string))
-        self.licenses = LE(typed_vector(string))
-        self.keywords = LE(typed_vector(string))
-        self.useflags = LE(typed_vector(string))
-        self.slots = LE(typed_vector(string))
-        self.sets = LE(typed_vector(string))
-
-class package (object):
-    """
-    The representation of one package.
-
-    Currently, version information is not parsed and stored.
-    So you can gain general infos only.
-
-    :IVariables:
-        
-        name : `LazyElement` <string>
-            The name of the package.
-
-        description : `LazyElement` <string>
-            Description of the package.
-
-        homepage : `LazyElement` <string>
-            The homepage of the package.
-
-        provide : `LazyElement` <int[]>
-            The indices of `header.provide` representing the PROVIDE value of the package.
-
-        license : `LazyElement` <int>
-            The index of `header.licenses` representing the license of the package.
-
-        useflags : `LazyElement` <int[]>
-            The indices of `header.useflags` representing the IUSE value of the package.
-    """
-
-    __slots__ = ("_offset", "name", "description", "provide",
-            "homepage", "license", "useflags")
-
-    def __init__ (self, file, skip = False):
-        """
-        :Parameters:
-
-            file : file
-                The file to read from.
-
-            skip : bool
-                Do not return the actual value, but just skip to the next datum.
-        """
-        def LE (t):
-            return LazyElement(t, file)
-        
-        self._offset = number(file)
-        
-        after_offset = file.tell()
-        
-        self.name = LE(string)
-        self.description = LE(string)
-        self.provide = LE(typed_vector(number))
-        self.homepage = LE(string)
-        self.license = LE(number)
-        self.useflags = LE(typed_vector(number))
-        
-        # self.versions = LE(typed_vector(version))
-        # for the moment just skip the versions
-        file.seek(self._offset - (file.tell() - after_offset), os.SEEK_CUR)
-
-class category (object):
-    """
-    Represents a whole category.
-
-    :IVariables:
-
-        name : `LazyElement` <string>
-            The category name.
-
-        packages : `LazyElement` <`package` []>
-            All the packages of the category.
-    """
-    __slots__ = ("name", "packages")
-
-    def __init__ (self, file, skip = False):
-        """
-        :Parameters:
-
-            file : file
-                The file to read from.
-
-            skip : bool
-                Do not return the actual value, but just skip to the next datum.
-        """
-        self.name = LazyElement(string, file)
-        self.packages = LazyElement(typed_vector(package), file)