| 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):
|
|
|
|
|
|
|
|
|
|
|
| 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
|
|
|
|
|
|
|
|
|
|
|
| def handle_scope(self, node, scope):
|
|
|
|
|
|
|
| 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:
|
|
|
| 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
|
|
|
|
|
| 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
|
|
|
| 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
|
|
|
|
|
|
|
|
|
| buffer_options = ("dtype", "ndim", "mode", "negative_indices", "cast")
|
| buffer_defaults = {"ndim": 1, "mode": "full", "negative_indices": True, "cast": False}
|
| buffer_positional_options_count = 1
|
|
|
| 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 name not in buffer_options:
|
| raise CompileError(pos, ERR_BUF_OPTION_UNKNOWN % name)
|
| options[name] = value
|
|
|
| for name, (value, pos) in zip(buffer_options, posargs):
|
| if name not 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
|
|
|
|
|
| for name in buffer_options:
|
| if name not 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
|
|
|
|
|
|
|
|
|
|
|
|
|
| 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):
|
|
|
|
|
|
|
| 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)
|
|
|
|
|
| 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):
|
|
|
|
|
| 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
|
|
|
| code.putln("%s.pybuffer.buf = NULL;" % pybuffer_struct)
|
| code.putln("%s.refcount = 0;" % pybuffer_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)
|
|
|
|
|
| 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("}")
|
|
|
|
|
| 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("{")
|
| code.putln("__Pyx_BufFmt_StackElem __pyx_stack[%d];" % buffer_type.dtype.struct_nesting_depth())
|
|
|
| getbuffer = get_getbuffer_call(code, "%s", buffer_aux, buffer_type)
|
|
|
| if is_initialized:
|
|
|
| code.putln('__Pyx_SafeReleaseBuffer(&%s.rcbuffer->pybuffer);' % pybuffernd_struct)
|
|
|
| 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)))
|
|
|
|
|
|
|
|
|
| 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)
|
| 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('}')
|
|
|
| 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:
|
|
|
|
|
|
|
| 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 {')
|
|
|
| put_unpack_buffer_aux_into_scope(buf_entry, code)
|
| code.putln('}')
|
|
|
| code.putln("}")
|
|
|
|
|
| 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']:
|
|
|
|
|
|
|
|
|
| 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:
|
|
|
| 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 ")
|
|
|
| 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:
|
|
|
| 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.
|
| """
|
|
|
| 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.
|
| """
|
|
|
| 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):
|
|
|
|
|
|
|
|
|
| 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
|
|
|
|
|
| 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):
|
|
|
|
|
| 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>"
|
|
|
|
|
|
|
| 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_cv_qualified:
|
| struct_scope = struct_scope.base_type_scope
|
|
|
| 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)
|
|
|
| if dtype.is_cv_qualified:
|
|
|
| struct_type = dtype.cv_base_type.empty_declaration_code()
|
| else:
|
| struct_type = dtype.empty_declaration_code()
|
|
|
| for f, typeinfo in zip(fields, types):
|
| typecode.putln(' {&%s, "%s", offsetof(%s, %s)},' %
|
| (typeinfo, f.name, struct_type, 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 = "__PYX_IS_UNSIGNED(%s)" % declcode
|
| typegroup = "'H'"
|
| elif dtype.is_int:
|
| is_unsigned = "__PYX_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")
|
|
|
|
|
|
|
| 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)
|
|
|
|
|
| _typeinfo_to_format_code = load_buffer_utility("TypeInfoToFormat")
|
|
|
