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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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cdef extern from "python-compat.h":
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cdef extern from *:
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ctypedef unsigned int size_t
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int memcmp(void *, void*, size_t)
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void sprintf(char *, char *, ...)
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cdef extern from "Python.h":
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ctypedef int Py_ssize_t # Required for older pyrex versions
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ctypedef struct PyObject:
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ctypedef _PyObject PyObject
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int PyTuple_CheckExact(object p)
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Py_ssize_t PyTuple_GET_SIZE(object t)
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int PyString_CheckExact(object)
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char *PyString_AS_STRING(object s)
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PyObject *PyString_FromStringAndSize_ptr "PyString_FromStringAndSize" (char *, Py_ssize_t)
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Py_ssize_t PyString_GET_SIZE(object)
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void PyString_InternInPlace(PyObject **)
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long PyInt_AS_LONG(object)
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int PyDict_SetItem(object d, object k, object v) except -1
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object PyTuple_New(Py_ssize_t count)
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void PyTuple_SET_ITEM(object t, Py_ssize_t offset, object)
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void Py_INCREF(object)
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void Py_DECREF_ptr "Py_DECREF" (PyObject *)
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PyObject * PyTuple_GET_ITEM_ptr "PyTuple_GET_ITEM" (object t,
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int PyString_CheckExact_ptr "PyString_CheckExact" (PyObject *p)
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Py_ssize_t PyString_GET_SIZE_ptr "PyString_GET_SIZE" (PyObject *s)
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char *PyString_AS_STRING_ptr "PyString_AS_STRING" (PyObject *s)
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object PyString_FromStringAndSize(char*, Py_ssize_t)
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cdef extern from "zlib.h":
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ctypedef unsigned long uLong
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ctypedef unsigned int uInt
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ctypedef unsigned char Bytef
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uLong crc32(uLong crc, Bytef *buf, uInt len)
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# cimport all of the definitions we will need to access
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from _static_tuple_c cimport StaticTuple,\
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import_static_tuple_c, StaticTuple_New, \
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StaticTuple_Intern, StaticTuple_SET_ITEM, StaticTuple_CheckExact, \
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from zlib import crc32
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# Set up the StaticTuple C_API functionality
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import_static_tuple_c()
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cdef object _InternalNode
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_InternalNode = None
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# We shouldn't just copy this from _dirstate_helpers_c
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cdef void* _my_memrchr(void *s, int c, size_t n):
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# We shouldn't just copy this from _dirstate_helpers_pyx
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cdef void* _my_memrchr(void *s, int c, size_t n): # cannot_raise
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# memrchr seems to be a GNU extension, so we have to implement it ourselves
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cdef object safe_interned_string_from_size(char *s, Py_ssize_t size):
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'tried to create a string with an invalid size: %d @0x%x'
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py_str = PyString_FromStringAndSize_ptr(s, size)
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PyString_InternInPlace(&py_str)
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result = <object>py_str
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# Casting a PyObject* to an <object> triggers an INCREF from Pyrex, so we
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# DECREF it to avoid geting immortal strings
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def _search_key_16(key):
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"""See chk_map._search_key_16."""
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cdef Py_ssize_t num_bits
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cdef Py_ssize_t i, j
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cdef Py_ssize_t num_out_bytes
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cdef unsigned long crc_val
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cdef Py_ssize_t out_off
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if not PyTuple_CheckExact(key):
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raise TypeError('key %r is not a tuple' % (key,))
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num_bits = PyTuple_GET_SIZE(key)
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# 4 bytes per crc32, and another 1 byte between bits
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num_out_bytes = (9 * num_bits) - 1
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out = PyString_FromStringAndSize(NULL, num_out_bytes)
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c_out[0] = c'\x00'
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# We use the _ptr variant, because GET_ITEM returns a borrowed
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# reference, and Pyrex assumes that returned 'object' are a new
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bit = PyTuple_GET_ITEM_ptr(key, i)
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if not PyString_CheckExact_ptr(bit):
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raise TypeError('Bit %d of %r is not a string' % (i, key))
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c_bit = <Bytef *>PyString_AS_STRING_ptr(bit)
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c_len = PyString_GET_SIZE_ptr(bit)
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crc_val = crc32(0, c_bit, c_len)
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crc_val = PyInt_AS_LONG(crc32(key[i]))
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sprintf(c_out, '%08X', crc_val)
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c_out = c_out + 8
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cdef Py_ssize_t num_bits
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cdef Py_ssize_t i, j
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cdef Py_ssize_t num_out_bytes
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cdef unsigned long crc_val
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cdef Py_ssize_t out_off
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if not PyTuple_CheckExact(key):
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raise TypeError('key %r is not a tuple' % (key,))
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num_bits = PyTuple_GET_SIZE(key)
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# 4 bytes per crc32, and another 1 byte between bits
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num_out_bytes = (5 * num_bits) - 1
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out = PyString_FromStringAndSize(NULL, num_out_bytes)
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c_out[0] = c'\x00'
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c_out = c_out + 1
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bit = PyTuple_GET_ITEM_ptr(key, i)
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if not PyString_CheckExact_ptr(bit):
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raise TypeError('Bit %d of %r is not a string: %r' % (i, key,
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c_bit = <Bytef *>PyString_AS_STRING_ptr(bit)
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c_len = PyString_GET_SIZE_ptr(bit)
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crc_val = crc32(0, c_bit, c_len)
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crc_val = PyInt_AS_LONG(crc32(key[i]))
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c_out[0] = (crc_val >> 24) & 0xFF
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c_out[1] = (crc_val >> 16) & 0xFF
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cdef _import_globals():
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"""Set the global attributes. Done lazy to avoid recursive import loops."""
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global _LeafNode, _InternalNode, _unknown
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from bzrlib import chk_map
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_LeafNode = chk_map.LeafNode
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_InternalNode = chk_map.InternalNode
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_unknown = chk_map._unknown
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def _deserialise_leaf_node(bytes, key, search_key_func=None):
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"""Deserialise bytes, with key key, into a LeafNode.
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cdef char *prefix, *value_start, *prefix_tail
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cdef char *next_null, *last_null, *line_start
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cdef char *c_entry, *entry_start
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cdef StaticTuple entry_bits
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if _LeafNode is None:
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from bzrlib import chk_map
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_LeafNode = chk_map.LeafNode
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_InternalNode = chk_map.InternalNode
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_unknown = chk_map._unknown
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result = _LeafNode(search_key_func=search_key_func)
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# Splitlines can split on '\r' so don't use it, split('\n') adds an
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if next_line == NULL:
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raise ValueError('missing trailing newline')
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cur = next_line + 1
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entry_bits = PyTuple_New(width)
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entry_bits = StaticTuple_New(width)
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for i from 0 <= i < num_prefix_bits:
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# TODO: Use PyList_GetItem, or turn prefix_bits into a
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entry = prefix_bits[i]
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# SET_ITEM 'steals' a reference
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PyTuple_SET_ITEM(entry_bits, i, entry)
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StaticTuple_SET_ITEM(entry_bits, i, entry)
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value = PyString_FromStringAndSize(value_start, next_line - value_start)
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# The next entry bit needs the 'tail' from the prefix, and first part
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memcpy(c_entry + prefix_tail_len, line_start, next_null - line_start)
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i = num_prefix_bits
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PyTuple_SET_ITEM(entry_bits, i, entry)
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StaticTuple_SET_ITEM(entry_bits, i, entry)
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while next_null != last_null: # We have remaining bits
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entry = PyString_FromStringAndSize(entry_start,
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next_null - entry_start)
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PyTuple_SET_ITEM(entry_bits, i, entry)
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if len(entry_bits) != width:
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StaticTuple_SET_ITEM(entry_bits, i, entry)
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if StaticTuple_GET_SIZE(entry_bits) != width:
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raise AssertionError(
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'Incorrect number of elements (%d vs %d)'
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% (len(entry_bits)+1, width + 1))
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entry_bits = StaticTuple_Intern(entry_bits)
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PyDict_SetItem(items, entry_bits, value)
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if len(items) != length:
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raise ValueError("item count (%d) mismatch for key %s,"
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cdef char *prefix, *line_prefix, *next_null, *c_item_prefix
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if _InternalNode is None:
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from bzrlib import chk_map
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_LeafNode = chk_map.LeafNode
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_InternalNode = chk_map.InternalNode
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_unknown = chk_map._unknown
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result = _InternalNode(search_key_func=search_key_func)
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if not StaticTuple_CheckExact(key):
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raise TypeError('key %r is not a StaticTuple' % (key,))
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if not PyString_CheckExact(bytes):
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raise TypeError('bytes must be a plain string not %s' % (type(bytes),))
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memcpy(c_item_prefix + prefix_length, cur, next_null - cur)
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flat_key = PyString_FromStringAndSize(next_null + 1,
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next_line - next_null - 1)
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PyDict_SetItem(items, item_prefix, (flat_key,))
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flat_key = StaticTuple(flat_key).intern()
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PyDict_SetItem(items, item_prefix, flat_key)
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cur = next_line + 1
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assert len(items) > 0
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result._items = items
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result._search_prefix = PyString_FromStringAndSize(prefix, prefix_length)
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def _bytes_to_text_key(bytes):
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"""Take a CHKInventory value string and return a (file_id, rev_id) tuple"""
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cdef char *byte_str, *cur_end, *file_id_str, *byte_end
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cdef char *revision_str
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cdef Py_ssize_t byte_size, pos, file_id_len
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if not PyString_CheckExact(bytes):
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raise TypeError('bytes must be a string')
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byte_str = PyString_AS_STRING(bytes)
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byte_size = PyString_GET_SIZE(bytes)
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byte_end = byte_str + byte_size
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cur_end = <char*>memchr(byte_str, c':', byte_size)
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raise ValueError('No kind section found.')
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if cur_end[1] != c' ':
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raise ValueError('Kind section should end with ": "')
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file_id_str = cur_end + 2
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# file_id is now the data up until the next newline
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cur_end = <char*>memchr(file_id_str, c'\n', byte_end - file_id_str)
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raise ValueError('no newline after file-id')
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file_id = safe_interned_string_from_size(file_id_str,
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cur_end - file_id_str)
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# this is the end of the parent_str
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cur_end = <char*>memchr(cur_end + 1, c'\n', byte_end - cur_end - 1)
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raise ValueError('no newline after parent_str')
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# end of the name str
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cur_end = <char*>memchr(cur_end + 1, c'\n', byte_end - cur_end - 1)
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raise ValueError('no newline after name str')
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# the next section is the revision info
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revision_str = cur_end + 1
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cur_end = <char*>memchr(cur_end + 1, c'\n', byte_end - cur_end - 1)
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# This is probably a dir: entry, which has revision as the last item
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revision = safe_interned_string_from_size(revision_str,
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cur_end - revision_str)
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key = StaticTuple_New(2)
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StaticTuple_SET_ITEM(key, 0, file_id)
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StaticTuple_SET_ITEM(key, 1, revision)
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return StaticTuple_Intern(key)