fix ya.make

1 files changed, 0 insertions, 740 deletions

diff --git a/contrib/tools/cython/Cython/Compiler/Buffer.py b/contrib/tools/cython/Cython/Compiler/Buffer.py
deleted file mode 100644
index c62a24f568..0000000000
--- a/contrib/tools/cython/Cython/Compiler/Buffer.py
+++ /dev/null
@@ -1,740 +0,0 @@
-from __future__ import absolute_import
-
-from .Visitor import CythonTransform
-from .ModuleNode import ModuleNode
-from .Errors import CompileError
-from .UtilityCode import CythonUtilityCode
-from .Code import UtilityCode, TempitaUtilityCode
-
-from . import Options
-from . import Interpreter
-from . import PyrexTypes
-from . import Naming
-from . import Symtab
-
-def dedent(text, reindent=0):
-    from textwrap import dedent
-    text = dedent(text)
-    if reindent > 0:
-        indent = " " * reindent
-        text = '\n'.join([indent + x for x in text.split('\n')])
-    return text
-
-class IntroduceBufferAuxiliaryVars(CythonTransform):
-
-    #
-    # Entry point
-    #
-
-    buffers_exists = False
-    using_memoryview = False
-
-    def __call__(self, node):
-        assert isinstance(node, ModuleNode)
-        self.max_ndim = 0
-        result = super(IntroduceBufferAuxiliaryVars, self).__call__(node)
-        if self.buffers_exists:
-            use_bufstruct_declare_code(node.scope)
-            use_py2_buffer_functions(node.scope)
-
-        return result
-
-
-    #
-    # Basic operations for transforms
-    #
-    def handle_scope(self, node, scope):
-        # For all buffers, insert extra variables in the scope.
-        # The variables are also accessible from the buffer_info
-        # on the buffer entry
-        scope_items = scope.entries.items()
-        bufvars = [entry for name, entry in scope_items if entry.type.is_buffer]
-        if len(bufvars) > 0:
-            bufvars.sort(key=lambda entry: entry.name)
-            self.buffers_exists = True
-
-        memviewslicevars = [entry for name, entry in scope_items if entry.type.is_memoryviewslice]
-        if len(memviewslicevars) > 0:
-            self.buffers_exists = True
-
-
-        for (name, entry) in scope_items:
-            if name == 'memoryview' and isinstance(entry.utility_code_definition, CythonUtilityCode):
-                self.using_memoryview = True
-                break
-        del scope_items
-
-        if isinstance(node, ModuleNode) and len(bufvars) > 0:
-            # for now...note that pos is wrong
-            raise CompileError(node.pos, "Buffer vars not allowed in module scope")
-        for entry in bufvars:
-            if entry.type.dtype.is_ptr:
-                raise CompileError(node.pos, "Buffers with pointer types not yet supported.")
-
-            name = entry.name
-            buftype = entry.type
-            if buftype.ndim > Options.buffer_max_dims:
-                raise CompileError(node.pos,
-                        "Buffer ndims exceeds Options.buffer_max_dims = %d" % Options.buffer_max_dims)
-            if buftype.ndim > self.max_ndim:
-                self.max_ndim = buftype.ndim
-
-            # Declare auxiliary vars
-            def decvar(type, prefix):
-                cname = scope.mangle(prefix, name)
-                aux_var = scope.declare_var(name=None, cname=cname,
-                                            type=type, pos=node.pos)
-                if entry.is_arg:
-                    aux_var.used = True # otherwise, NameNode will mark whether it is used
-
-                return aux_var
-
-            auxvars = ((PyrexTypes.c_pyx_buffer_nd_type, Naming.pybuffernd_prefix),
-                       (PyrexTypes.c_pyx_buffer_type, Naming.pybufferstruct_prefix))
-            pybuffernd, rcbuffer = [decvar(type, prefix) for (type, prefix) in auxvars]
-
-            entry.buffer_aux = Symtab.BufferAux(pybuffernd, rcbuffer)
-
-        scope.buffer_entries = bufvars
-        self.scope = scope
-
-    def visit_ModuleNode(self, node):
-        self.handle_scope(node, node.scope)
-        self.visitchildren(node)
-        return node
-
-    def visit_FuncDefNode(self, node):
-        self.handle_scope(node, node.local_scope)
-        self.visitchildren(node)
-        return node
-
-#
-# Analysis
-#
-buffer_options = ("dtype", "ndim", "mode", "negative_indices", "cast") # ordered!
-buffer_defaults = {"ndim": 1, "mode": "full", "negative_indices": True, "cast": False}
-buffer_positional_options_count = 1 # anything beyond this needs keyword argument
-
-ERR_BUF_OPTION_UNKNOWN = '"%s" is not a buffer option'
-ERR_BUF_TOO_MANY = 'Too many buffer options'
-ERR_BUF_DUP = '"%s" buffer option already supplied'
-ERR_BUF_MISSING = '"%s" missing'
-ERR_BUF_MODE = 'Only allowed buffer modes are: "c", "fortran", "full", "strided" (as a compile-time string)'
-ERR_BUF_NDIM = 'ndim must be a non-negative integer'
-ERR_BUF_DTYPE = 'dtype must be "object", numeric type or a struct'
-ERR_BUF_BOOL = '"%s" must be a boolean'
-
-def analyse_buffer_options(globalpos, env, posargs, dictargs, defaults=None, need_complete=True):
-    """
-    Must be called during type analysis, as analyse is called
-    on the dtype argument.
-
-    posargs and dictargs should consist of a list and a dict
-    of tuples (value, pos). Defaults should be a dict of values.
-
-    Returns a dict containing all the options a buffer can have and
-    its value (with the positions stripped).
-    """
-    if defaults is None:
-        defaults = buffer_defaults
-
-    posargs, dictargs = Interpreter.interpret_compiletime_options(
-        posargs, dictargs, type_env=env, type_args=(0, 'dtype'))
-
-    if len(posargs) > buffer_positional_options_count:
-        raise CompileError(posargs[-1][1], ERR_BUF_TOO_MANY)
-
-    options = {}
-    for name, (value, pos) in dictargs.items():
-        if not name in buffer_options:
-            raise CompileError(pos, ERR_BUF_OPTION_UNKNOWN % name)
-        options[name] = value
-
-    for name, (value, pos) in zip(buffer_options, posargs):
-        if not name in buffer_options:
-            raise CompileError(pos, ERR_BUF_OPTION_UNKNOWN % name)
-        if name in options:
-            raise CompileError(pos, ERR_BUF_DUP % name)
-        options[name] = value
-
-    # Check that they are all there and copy defaults
-    for name in buffer_options:
-        if not name in options:
-            try:
-                options[name] = defaults[name]
-            except KeyError:
-                if need_complete:
-                    raise CompileError(globalpos, ERR_BUF_MISSING % name)
-
-    dtype = options.get("dtype")
-    if dtype and dtype.is_extension_type:
-        raise CompileError(globalpos, ERR_BUF_DTYPE)
-
-    ndim = options.get("ndim")
-    if ndim and (not isinstance(ndim, int) or ndim < 0):
-        raise CompileError(globalpos, ERR_BUF_NDIM)
-
-    mode = options.get("mode")
-    if mode and not (mode in ('full', 'strided', 'c', 'fortran')):
-        raise CompileError(globalpos, ERR_BUF_MODE)
-
-    def assert_bool(name):
-        x = options.get(name)
-        if not isinstance(x, bool):
-            raise CompileError(globalpos, ERR_BUF_BOOL % name)
-
-    assert_bool('negative_indices')
-    assert_bool('cast')
-
-    return options
-
-
-#
-# Code generation
-#
-
-class BufferEntry(object):
-    def __init__(self, entry):
-        self.entry = entry
-        self.type = entry.type
-        self.cname = entry.buffer_aux.buflocal_nd_var.cname
-        self.buf_ptr = "%s.rcbuffer->pybuffer.buf" % self.cname
-        self.buf_ptr_type = entry.type.buffer_ptr_type
-        self.init_attributes()
-
-    def init_attributes(self):
-        self.shape = self.get_buf_shapevars()
-        self.strides = self.get_buf_stridevars()
-        self.suboffsets = self.get_buf_suboffsetvars()
-
-    def get_buf_suboffsetvars(self):
-        return self._for_all_ndim("%s.diminfo[%d].suboffsets")
-
-    def get_buf_stridevars(self):
-        return self._for_all_ndim("%s.diminfo[%d].strides")
-
-    def get_buf_shapevars(self):
-        return self._for_all_ndim("%s.diminfo[%d].shape")
-
-    def _for_all_ndim(self, s):
-        return [s % (self.cname, i) for i in range(self.type.ndim)]
-
-    def generate_buffer_lookup_code(self, code, index_cnames):
-        # Create buffer lookup and return it
-        # This is done via utility macros/inline functions, which vary
-        # according to the access mode used.
-        params = []
-        nd = self.type.ndim
-        mode = self.type.mode
-        if mode == 'full':
-            for i, s, o in zip(index_cnames,
-                               self.get_buf_stridevars(),
-                               self.get_buf_suboffsetvars()):
-                params.append(i)
-                params.append(s)
-                params.append(o)
-            funcname = "__Pyx_BufPtrFull%dd" % nd
-            funcgen = buf_lookup_full_code
-        else:
-            if mode == 'strided':
-                funcname = "__Pyx_BufPtrStrided%dd" % nd
-                funcgen = buf_lookup_strided_code
-            elif mode == 'c':
-                funcname = "__Pyx_BufPtrCContig%dd" % nd
-                funcgen = buf_lookup_c_code
-            elif mode == 'fortran':
-                funcname = "__Pyx_BufPtrFortranContig%dd" % nd
-                funcgen = buf_lookup_fortran_code
-            else:
-                assert False
-            for i, s in zip(index_cnames, self.get_buf_stridevars()):
-                params.append(i)
-                params.append(s)
-
-        # Make sure the utility code is available
-        if funcname not in code.globalstate.utility_codes:
-            code.globalstate.utility_codes.add(funcname)
-            protocode = code.globalstate['utility_code_proto']
-            defcode = code.globalstate['utility_code_def']
-            funcgen(protocode, defcode, name=funcname, nd=nd)
-
-        buf_ptr_type_code = self.buf_ptr_type.empty_declaration_code()
-        ptrcode = "%s(%s, %s, %s)" % (funcname, buf_ptr_type_code, self.buf_ptr,
-                                      ", ".join(params))
-        return ptrcode
-
-
-def get_flags(buffer_aux, buffer_type):
-    flags = 'PyBUF_FORMAT'
-    mode = buffer_type.mode
-    if mode == 'full':
-        flags += '| PyBUF_INDIRECT'
-    elif mode == 'strided':
-        flags += '| PyBUF_STRIDES'
-    elif mode == 'c':
-        flags += '| PyBUF_C_CONTIGUOUS'
-    elif mode == 'fortran':
-        flags += '| PyBUF_F_CONTIGUOUS'
-    else:
-        assert False
-    if buffer_aux.writable_needed: flags += "| PyBUF_WRITABLE"
-    return flags
-
-def used_buffer_aux_vars(entry):
-    buffer_aux = entry.buffer_aux
-    buffer_aux.buflocal_nd_var.used = True
-    buffer_aux.rcbuf_var.used = True
-
-def put_unpack_buffer_aux_into_scope(buf_entry, code):
-    # Generate code to copy the needed struct info into local
-    # variables.
-    buffer_aux, mode = buf_entry.buffer_aux, buf_entry.type.mode
-    pybuffernd_struct = buffer_aux.buflocal_nd_var.cname
-
-    fldnames = ['strides', 'shape']
-    if mode == 'full':
-        fldnames.append('suboffsets')
-
-    ln = []
-    for i in range(buf_entry.type.ndim):
-        for fldname in fldnames:
-            ln.append("%s.diminfo[%d].%s = %s.rcbuffer->pybuffer.%s[%d];" % \
-                    (pybuffernd_struct, i, fldname,
-                     pybuffernd_struct, fldname, i))
-    code.putln(' '.join(ln))
-
-def put_init_vars(entry, code):
-    bufaux = entry.buffer_aux
-    pybuffernd_struct = bufaux.buflocal_nd_var.cname
-    pybuffer_struct = bufaux.rcbuf_var.cname
-    # init pybuffer_struct
-    code.putln("%s.pybuffer.buf = NULL;" % pybuffer_struct)
-    code.putln("%s.refcount = 0;" % pybuffer_struct)
-    # init the buffer object
-    # code.put_init_var_to_py_none(entry)
-    # init the pybuffernd_struct
-    code.putln("%s.data = NULL;" % pybuffernd_struct)
-    code.putln("%s.rcbuffer = &%s;" % (pybuffernd_struct, pybuffer_struct))
-
-
-def put_acquire_arg_buffer(entry, code, pos):
-    buffer_aux = entry.buffer_aux
-    getbuffer = get_getbuffer_call(code, entry.cname, buffer_aux, entry.type)
-
-    # Acquire any new buffer
-    code.putln("{")
-    code.putln("__Pyx_BufFmt_StackElem __pyx_stack[%d];" % entry.type.dtype.struct_nesting_depth())
-    code.putln(code.error_goto_if("%s == -1" % getbuffer, pos))
-    code.putln("}")
-    # An exception raised in arg parsing cannot be caught, so no
-    # need to care about the buffer then.
-    put_unpack_buffer_aux_into_scope(entry, code)
-
-
-def put_release_buffer_code(code, entry):
-    code.globalstate.use_utility_code(acquire_utility_code)
-    code.putln("__Pyx_SafeReleaseBuffer(&%s.rcbuffer->pybuffer);" % entry.buffer_aux.buflocal_nd_var.cname)
-
-
-def get_getbuffer_call(code, obj_cname, buffer_aux, buffer_type):
-    ndim = buffer_type.ndim
-    cast = int(buffer_type.cast)
-    flags = get_flags(buffer_aux, buffer_type)
-    pybuffernd_struct = buffer_aux.buflocal_nd_var.cname
-
-    dtype_typeinfo = get_type_information_cname(code, buffer_type.dtype)
-
-    code.globalstate.use_utility_code(acquire_utility_code)
-    return ("__Pyx_GetBufferAndValidate(&%(pybuffernd_struct)s.rcbuffer->pybuffer, "
-            "(PyObject*)%(obj_cname)s, &%(dtype_typeinfo)s, %(flags)s, %(ndim)d, "
-            "%(cast)d, __pyx_stack)" % locals())
-
-
-def put_assign_to_buffer(lhs_cname, rhs_cname, buf_entry,
-                         is_initialized, pos, code):
-    """
-    Generate code for reassigning a buffer variables. This only deals with getting
-    the buffer auxiliary structure and variables set up correctly, the assignment
-    itself and refcounting is the responsibility of the caller.
-
-    However, the assignment operation may throw an exception so that the reassignment
-    never happens.
-
-    Depending on the circumstances there are two possible outcomes:
-    - Old buffer released, new acquired, rhs assigned to lhs
-    - Old buffer released, new acquired which fails, reaqcuire old lhs buffer
-      (which may or may not succeed).
-    """
-
-    buffer_aux, buffer_type = buf_entry.buffer_aux, buf_entry.type
-    pybuffernd_struct = buffer_aux.buflocal_nd_var.cname
-    flags = get_flags(buffer_aux, buffer_type)
-
-    code.putln("{")  # Set up necessary stack for getbuffer
-    code.putln("__Pyx_BufFmt_StackElem __pyx_stack[%d];" % buffer_type.dtype.struct_nesting_depth())
-
-    getbuffer = get_getbuffer_call(code, "%s", buffer_aux, buffer_type) # fill in object below
-
-    if is_initialized:
-        # Release any existing buffer
-        code.putln('__Pyx_SafeReleaseBuffer(&%s.rcbuffer->pybuffer);' % pybuffernd_struct)
-        # Acquire
-        retcode_cname = code.funcstate.allocate_temp(PyrexTypes.c_int_type, manage_ref=False)
-        code.putln("%s = %s;" % (retcode_cname, getbuffer % rhs_cname))
-        code.putln('if (%s) {' % (code.unlikely("%s < 0" % retcode_cname)))
-        # If acquisition failed, attempt to reacquire the old buffer
-        # before raising the exception. A failure of reacquisition
-        # will cause the reacquisition exception to be reported, one
-        # can consider working around this later.
-        exc_temps = tuple(code.funcstate.allocate_temp(PyrexTypes.py_object_type, manage_ref=False)
-                          for _ in range(3))
-        code.putln('PyErr_Fetch(&%s, &%s, &%s);' % exc_temps)
-        code.putln('if (%s) {' % code.unlikely("%s == -1" % (getbuffer % lhs_cname)))
-        code.putln('Py_XDECREF(%s); Py_XDECREF(%s); Py_XDECREF(%s);' % exc_temps)  # Do not refnanny these!
-        code.globalstate.use_utility_code(raise_buffer_fallback_code)
-        code.putln('__Pyx_RaiseBufferFallbackError();')
-        code.putln('} else {')
-        code.putln('PyErr_Restore(%s, %s, %s);' % exc_temps)
-        code.putln('}')
-        code.putln('%s = %s = %s = 0;' % exc_temps)
-        for t in exc_temps:
-            code.funcstate.release_temp(t)
-        code.putln('}')
-        # Unpack indices
-        put_unpack_buffer_aux_into_scope(buf_entry, code)
-        code.putln(code.error_goto_if_neg(retcode_cname, pos))
-        code.funcstate.release_temp(retcode_cname)
-    else:
-        # Our entry had no previous value, so set to None when acquisition fails.
-        # In this case, auxiliary vars should be set up right in initialization to a zero-buffer,
-        # so it suffices to set the buf field to NULL.
-        code.putln('if (%s) {' % code.unlikely("%s == -1" % (getbuffer % rhs_cname)))
-        code.putln('%s = %s; __Pyx_INCREF(Py_None); %s.rcbuffer->pybuffer.buf = NULL;' %
-                   (lhs_cname,
-                    PyrexTypes.typecast(buffer_type, PyrexTypes.py_object_type, "Py_None"),
-                    pybuffernd_struct))
-        code.putln(code.error_goto(pos))
-        code.put('} else {')
-        # Unpack indices
-        put_unpack_buffer_aux_into_scope(buf_entry, code)
-        code.putln('}')
-
-    code.putln("}") # Release stack
-
-
-def put_buffer_lookup_code(entry, index_signeds, index_cnames, directives,
-                           pos, code, negative_indices, in_nogil_context):
-    """
-    Generates code to process indices and calculate an offset into
-    a buffer. Returns a C string which gives a pointer which can be
-    read from or written to at will (it is an expression so caller should
-    store it in a temporary if it is used more than once).
-
-    As the bounds checking can have any number of combinations of unsigned
-    arguments, smart optimizations etc. we insert it directly in the function
-    body. The lookup however is delegated to a inline function that is instantiated
-    once per ndim (lookup with suboffsets tend to get quite complicated).
-
-    entry is a BufferEntry
-    """
-    negative_indices = directives['wraparound'] and negative_indices
-
-    if directives['boundscheck']:
-        # Check bounds and fix negative indices.
-        # We allocate a temporary which is initialized to -1, meaning OK (!).
-        # If an error occurs, the temp is set to the index dimension the
-        # error is occurring at.
-        failed_dim_temp = code.funcstate.allocate_temp(PyrexTypes.c_int_type, manage_ref=False)
-        code.putln("%s = -1;" % failed_dim_temp)
-        for dim, (signed, cname, shape) in enumerate(zip(index_signeds, index_cnames, entry.get_buf_shapevars())):
-            if signed != 0:
-                # not unsigned, deal with negative index
-                code.putln("if (%s < 0) {" % cname)
-                if negative_indices:
-                    code.putln("%s += %s;" % (cname, shape))
-                    code.putln("if (%s) %s = %d;" % (
-                        code.unlikely("%s < 0" % cname),
-                        failed_dim_temp, dim))
-                else:
-                    code.putln("%s = %d;" % (failed_dim_temp, dim))
-                code.put("} else ")
-            # check bounds in positive direction
-            if signed != 0:
-                cast = ""
-            else:
-                cast = "(size_t)"
-            code.putln("if (%s) %s = %d;" % (
-                code.unlikely("%s >= %s%s" % (cname, cast, shape)),
-                failed_dim_temp, dim))
-
-        if in_nogil_context:
-            code.globalstate.use_utility_code(raise_indexerror_nogil)
-            func = '__Pyx_RaiseBufferIndexErrorNogil'
-        else:
-            code.globalstate.use_utility_code(raise_indexerror_code)
-            func = '__Pyx_RaiseBufferIndexError'
-
-        code.putln("if (%s) {" % code.unlikely("%s != -1" % failed_dim_temp))
-        code.putln('%s(%s);' % (func, failed_dim_temp))
-        code.putln(code.error_goto(pos))
-        code.putln('}')
-        code.funcstate.release_temp(failed_dim_temp)
-    elif negative_indices:
-        # Only fix negative indices.
-        for signed, cname, shape in zip(index_signeds, index_cnames, entry.get_buf_shapevars()):
-            if signed != 0:
-                code.putln("if (%s < 0) %s += %s;" % (cname, cname, shape))
-
-    return entry.generate_buffer_lookup_code(code, index_cnames)
-
-
-def use_bufstruct_declare_code(env):
-    env.use_utility_code(buffer_struct_declare_code)
-
-
-def buf_lookup_full_code(proto, defin, name, nd):
-    """
-    Generates a buffer lookup function for the right number
-    of dimensions. The function gives back a void* at the right location.
-    """
-    # _i_ndex, _s_tride, sub_o_ffset
-    macroargs = ", ".join(["i%d, s%d, o%d" % (i, i, i) for i in range(nd)])
-    proto.putln("#define %s(type, buf, %s) (type)(%s_imp(buf, %s))" % (name, macroargs, name, macroargs))
-
-    funcargs = ", ".join(["Py_ssize_t i%d, Py_ssize_t s%d, Py_ssize_t o%d" % (i, i, i) for i in range(nd)])
-    proto.putln("static CYTHON_INLINE void* %s_imp(void* buf, %s);" % (name, funcargs))
-    defin.putln(dedent("""
-        static CYTHON_INLINE void* %s_imp(void* buf, %s) {
-          char* ptr = (char*)buf;
-        """) % (name, funcargs) + "".join([dedent("""\
-          ptr += s%d * i%d;
-          if (o%d >= 0) ptr = *((char**)ptr) + o%d;
-        """) % (i, i, i, i) for i in range(nd)]
-        ) + "\nreturn ptr;\n}")
-
-
-def buf_lookup_strided_code(proto, defin, name, nd):
-    """
-    Generates a buffer lookup function for the right number
-    of dimensions. The function gives back a void* at the right location.
-    """
-    # _i_ndex, _s_tride
-    args = ", ".join(["i%d, s%d" % (i, i) for i in range(nd)])
-    offset = " + ".join(["i%d * s%d" % (i, i) for i in range(nd)])
-    proto.putln("#define %s(type, buf, %s) (type)((char*)buf + %s)" % (name, args, offset))
-
-
-def buf_lookup_c_code(proto, defin, name, nd):
-    """
-    Similar to strided lookup, but can assume that the last dimension
-    doesn't need a multiplication as long as.
-    Still we keep the same signature for now.
-    """
-    if nd == 1:
-        proto.putln("#define %s(type, buf, i0, s0) ((type)buf + i0)" % name)
-    else:
-        args = ", ".join(["i%d, s%d" % (i, i) for i in range(nd)])
-        offset = " + ".join(["i%d * s%d" % (i, i) for i in range(nd - 1)])
-        proto.putln("#define %s(type, buf, %s) ((type)((char*)buf + %s) + i%d)" % (name, args, offset, nd - 1))
-
-
-def buf_lookup_fortran_code(proto, defin, name, nd):
-    """
-    Like C lookup, but the first index is optimized instead.
-    """
-    if nd == 1:
-        proto.putln("#define %s(type, buf, i0, s0) ((type)buf + i0)" % name)
-    else:
-        args = ", ".join(["i%d, s%d" % (i, i) for i in range(nd)])
-        offset = " + ".join(["i%d * s%d" % (i, i) for i in range(1, nd)])
-        proto.putln("#define %s(type, buf, %s) ((type)((char*)buf + %s) + i%d)" % (name, args, offset, 0))
-
-
-def use_py2_buffer_functions(env):
-    env.use_utility_code(GetAndReleaseBufferUtilityCode())
-
-
-class GetAndReleaseBufferUtilityCode(object):
-    # Emulation of PyObject_GetBuffer and PyBuffer_Release for Python 2.
-    # For >= 2.6 we do double mode -- use the new buffer interface on objects
-    # which has the right tp_flags set, but emulation otherwise.
-
-    requires = None
-    is_cython_utility = False
-
-    def __init__(self):
-        pass
-
-    def __eq__(self, other):
-        return isinstance(other, GetAndReleaseBufferUtilityCode)
-
-    def __hash__(self):
-        return 24342342
-
-    def get_tree(self, **kwargs): pass
-
-    def put_code(self, output):
-        code = output['utility_code_def']
-        proto_code = output['utility_code_proto']
-        env = output.module_node.scope
-        cython_scope = env.context.cython_scope
-
-        # Search all types for __getbuffer__ overloads
-        types = []
-        visited_scopes = set()
-        def find_buffer_types(scope):
-            if scope in visited_scopes:
-                return
-            visited_scopes.add(scope)
-            for m in scope.cimported_modules:
-                find_buffer_types(m)
-            for e in scope.type_entries:
-                if isinstance(e.utility_code_definition, CythonUtilityCode):
-                    continue
-                t = e.type
-                if t.is_extension_type:
-                    if scope is cython_scope and not e.used:
-                        continue
-                    release = get = None
-                    for x in t.scope.pyfunc_entries:
-                        if x.name == u"__getbuffer__": get = x.func_cname
-                        elif x.name == u"__releasebuffer__": release = x.func_cname
-                    if get:
-                        types.append((t.typeptr_cname, get, release))
-
-        find_buffer_types(env)
-
-        util_code = TempitaUtilityCode.load(
-            "GetAndReleaseBuffer", from_file="Buffer.c",
-            context=dict(types=types))
-
-        proto = util_code.format_code(util_code.proto)
-        impl = util_code.format_code(
-            util_code.inject_string_constants(util_code.impl, output)[1])
-
-        proto_code.putln(proto)
-        code.putln(impl)
-
-
-def mangle_dtype_name(dtype):
-    # Use prefixes to separate user defined types from builtins
-    # (consider "typedef float unsigned_int")
-    if dtype.is_pyobject:
-        return "object"
-    elif dtype.is_ptr:
-        return "ptr"
-    else:
-        if dtype.is_typedef or dtype.is_struct_or_union:
-            prefix = "nn_"
-        else:
-            prefix = ""
-        return prefix + dtype.specialization_name()
-
-def get_type_information_cname(code, dtype, maxdepth=None):
-    """
-    Output the run-time type information (__Pyx_TypeInfo) for given dtype,
-    and return the name of the type info struct.
-
-    Structs with two floats of the same size are encoded as complex numbers.
-    One can separate between complex numbers declared as struct or with native
-    encoding by inspecting to see if the fields field of the type is
-    filled in.
-    """
-    namesuffix = mangle_dtype_name(dtype)
-    name = "__Pyx_TypeInfo_%s" % namesuffix
-    structinfo_name = "__Pyx_StructFields_%s" % namesuffix
-
-    if dtype.is_error: return "<error>"
-
-    # It's critical that walking the type info doesn't use more stack
-    # depth than dtype.struct_nesting_depth() returns, so use an assertion for this
-    if maxdepth is None: maxdepth = dtype.struct_nesting_depth()
-    if maxdepth <= 0:
-        assert False
-
-    if name not in code.globalstate.utility_codes:
-        code.globalstate.utility_codes.add(name)
-        typecode = code.globalstate['typeinfo']
-
-        arraysizes = []
-        if dtype.is_array:
-            while dtype.is_array:
-                arraysizes.append(dtype.size)
-                dtype = dtype.base_type
-
-        complex_possible = dtype.is_struct_or_union and dtype.can_be_complex()
-
-        declcode = dtype.empty_declaration_code()
-        if dtype.is_simple_buffer_dtype():
-            structinfo_name = "NULL"
-        elif dtype.is_struct:
-            struct_scope = dtype.scope
-            if dtype.is_const:
-                struct_scope = struct_scope.const_base_type_scope
-            # Must pre-call all used types in order not to recurse during utility code writing.
-            fields = struct_scope.var_entries
-            assert len(fields) > 0
-            types = [get_type_information_cname(code, f.type, maxdepth - 1)
-                     for f in fields]
-            typecode.putln("static __Pyx_StructField %s[] = {" % structinfo_name, safe=True)
-            for f, typeinfo in zip(fields, types):
-                typecode.putln('  {&%s, "%s", offsetof(%s, %s)},' %
-                           (typeinfo, f.name, dtype.empty_declaration_code(), f.cname), safe=True)
-            typecode.putln('  {NULL, NULL, 0}', safe=True)
-            typecode.putln("};", safe=True)
-        else:
-            assert False
-
-        rep = str(dtype)
-
-        flags = "0"
-        is_unsigned = "0"
-        if dtype is PyrexTypes.c_char_type:
-            is_unsigned = "IS_UNSIGNED(%s)" % declcode
-            typegroup = "'H'"
-        elif dtype.is_int:
-            is_unsigned = "IS_UNSIGNED(%s)" % declcode
-            typegroup = "%s ? 'U' : 'I'" % is_unsigned
-        elif complex_possible or dtype.is_complex:
-            typegroup = "'C'"
-        elif dtype.is_float:
-            typegroup = "'R'"
-        elif dtype.is_struct:
-            typegroup = "'S'"
-            if dtype.packed:
-                flags = "__PYX_BUF_FLAGS_PACKED_STRUCT"
-        elif dtype.is_pyobject:
-            typegroup = "'O'"
-        else:
-            assert False, dtype
-
-        typeinfo = ('static __Pyx_TypeInfo %s = '
-                        '{ "%s", %s, sizeof(%s), { %s }, %s, %s, %s, %s };')
-        tup = (name, rep, structinfo_name, declcode,
-               ', '.join([str(x) for x in arraysizes]) or '0', len(arraysizes),
-               typegroup, is_unsigned, flags)
-        typecode.putln(typeinfo % tup, safe=True)
-
-    return name
-
-def load_buffer_utility(util_code_name, context=None, **kwargs):
-    if context is None:
-        return UtilityCode.load(util_code_name, "Buffer.c", **kwargs)
-    else:
-        return TempitaUtilityCode.load(util_code_name, "Buffer.c", context=context, **kwargs)
-
-context = dict(max_dims=Options.buffer_max_dims)
-buffer_struct_declare_code = load_buffer_utility("BufferStructDeclare", context=context)
-buffer_formats_declare_code = load_buffer_utility("BufferFormatStructs")
-
-# Utility function to set the right exception
-# The caller should immediately goto_error
-raise_indexerror_code = load_buffer_utility("BufferIndexError")
-raise_indexerror_nogil = load_buffer_utility("BufferIndexErrorNogil")
-raise_buffer_fallback_code = load_buffer_utility("BufferFallbackError")
-
-acquire_utility_code = load_buffer_utility("BufferGetAndValidate", context=context)
-buffer_format_check_code = load_buffer_utility("BufferFormatCheck", context=context)
-
-# See utility code BufferFormatFromTypeInfo
-_typeinfo_to_format_code = load_buffer_utility("TypeInfoToFormat")