1291 lines
51 KiB
Python
1291 lines
51 KiB
Python
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import os, sys, io
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from . import ffiplatform, model
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from .cffi_opcode import *
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VERSION = "0x2601"
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class GlobalExpr:
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def __init__(self, name, address, type_op, size=0, check_value=0):
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self.name = name
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self.address = address
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self.type_op = type_op
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self.size = size
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self.check_value = check_value
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def as_c_expr(self):
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return ' { "%s", (void *)%s, %s, (void *)%s },' % (
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self.name, self.address, self.type_op.as_c_expr(), self.size)
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def as_python_expr(self):
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return "b'%s%s',%d" % (self.type_op.as_python_bytes(), self.name,
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self.check_value)
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class FieldExpr:
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def __init__(self, name, field_offset, field_size, fbitsize, field_type_op):
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self.name = name
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self.field_offset = field_offset
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self.field_size = field_size
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self.fbitsize = fbitsize
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self.field_type_op = field_type_op
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def as_c_expr(self):
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spaces = " " * len(self.name)
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return (' { "%s", %s,\n' % (self.name, self.field_offset) +
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' %s %s,\n' % (spaces, self.field_size) +
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' %s %s },' % (spaces, self.field_type_op.as_c_expr()))
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def as_python_expr(self):
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raise NotImplementedError
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def as_field_python_expr(self):
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if self.field_type_op.op == OP_NOOP:
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size_expr = ''
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elif self.field_type_op.op == OP_BITFIELD:
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size_expr = format_four_bytes(self.fbitsize)
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else:
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raise NotImplementedError
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return "b'%s%s%s'" % (self.field_type_op.as_python_bytes(),
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size_expr,
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self.name)
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class StructUnionExpr:
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def __init__(self, name, type_index, flags, size, alignment, comment,
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first_field_index, c_fields):
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self.name = name
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self.type_index = type_index
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self.flags = flags
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self.size = size
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self.alignment = alignment
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self.comment = comment
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self.first_field_index = first_field_index
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self.c_fields = c_fields
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def as_c_expr(self):
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return (' { "%s", %d, %s,' % (self.name, self.type_index, self.flags)
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+ '\n %s, %s, ' % (self.size, self.alignment)
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+ '%d, %d ' % (self.first_field_index, len(self.c_fields))
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+ ('/* %s */ ' % self.comment if self.comment else '')
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+ '},')
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def as_python_expr(self):
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flags = eval(self.flags, G_FLAGS)
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fields_expr = [c_field.as_field_python_expr()
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for c_field in self.c_fields]
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return "(b'%s%s%s',%s)" % (
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format_four_bytes(self.type_index),
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format_four_bytes(flags),
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self.name,
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','.join(fields_expr))
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class EnumExpr:
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def __init__(self, name, type_index, size, signed, allenums):
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self.name = name
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self.type_index = type_index
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self.size = size
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self.signed = signed
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self.allenums = allenums
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def as_c_expr(self):
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return (' { "%s", %d, _cffi_prim_int(%s, %s),\n'
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' "%s" },' % (self.name, self.type_index,
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self.size, self.signed, self.allenums))
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def as_python_expr(self):
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prim_index = {
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(1, 0): PRIM_UINT8, (1, 1): PRIM_INT8,
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(2, 0): PRIM_UINT16, (2, 1): PRIM_INT16,
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(4, 0): PRIM_UINT32, (4, 1): PRIM_INT32,
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(8, 0): PRIM_UINT64, (8, 1): PRIM_INT64,
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}[self.size, self.signed]
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return "b'%s%s%s\\x00%s'" % (format_four_bytes(self.type_index),
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format_four_bytes(prim_index),
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self.name, self.allenums)
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class TypenameExpr:
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def __init__(self, name, type_index):
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self.name = name
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self.type_index = type_index
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def as_c_expr(self):
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return ' { "%s", %d },' % (self.name, self.type_index)
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def as_python_expr(self):
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return "b'%s%s'" % (format_four_bytes(self.type_index), self.name)
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# ____________________________________________________________
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class Recompiler:
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def __init__(self, ffi, module_name, target_is_python=False):
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self.ffi = ffi
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self.module_name = module_name
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self.target_is_python = target_is_python
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def collect_type_table(self):
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self._typesdict = {}
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self._generate("collecttype")
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#
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all_decls = sorted(self._typesdict, key=str)
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#
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# prepare all FUNCTION bytecode sequences first
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self.cffi_types = []
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for tp in all_decls:
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if tp.is_raw_function:
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assert self._typesdict[tp] is None
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self._typesdict[tp] = len(self.cffi_types)
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self.cffi_types.append(tp) # placeholder
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for tp1 in tp.args:
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assert isinstance(tp1, (model.VoidType,
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model.BasePrimitiveType,
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model.PointerType,
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model.StructOrUnionOrEnum,
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model.FunctionPtrType))
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if self._typesdict[tp1] is None:
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self._typesdict[tp1] = len(self.cffi_types)
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self.cffi_types.append(tp1) # placeholder
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self.cffi_types.append('END') # placeholder
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#
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# prepare all OTHER bytecode sequences
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for tp in all_decls:
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if not tp.is_raw_function and self._typesdict[tp] is None:
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self._typesdict[tp] = len(self.cffi_types)
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self.cffi_types.append(tp) # placeholder
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if tp.is_array_type and tp.length is not None:
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self.cffi_types.append('LEN') # placeholder
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assert None not in self._typesdict.values()
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#
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# collect all structs and unions and enums
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self._struct_unions = {}
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self._enums = {}
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for tp in all_decls:
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if isinstance(tp, model.StructOrUnion):
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self._struct_unions[tp] = None
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elif isinstance(tp, model.EnumType):
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self._enums[tp] = None
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for i, tp in enumerate(sorted(self._struct_unions,
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key=lambda tp: tp.name)):
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self._struct_unions[tp] = i
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for i, tp in enumerate(sorted(self._enums,
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key=lambda tp: tp.name)):
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self._enums[tp] = i
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#
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# emit all bytecode sequences now
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for tp in all_decls:
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method = getattr(self, '_emit_bytecode_' + tp.__class__.__name__)
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method(tp, self._typesdict[tp])
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#
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# consistency check
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for op in self.cffi_types:
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assert isinstance(op, CffiOp)
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self.cffi_types = tuple(self.cffi_types) # don't change any more
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def _do_collect_type(self, tp):
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if not isinstance(tp, model.BaseTypeByIdentity):
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if isinstance(tp, tuple):
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for x in tp:
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self._do_collect_type(x)
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return
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if tp not in self._typesdict:
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self._typesdict[tp] = None
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if isinstance(tp, model.FunctionPtrType):
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self._do_collect_type(tp.as_raw_function())
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elif isinstance(tp, model.StructOrUnion):
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if tp.fldtypes is not None and (
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tp not in self.ffi._parser._included_declarations):
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for name1, tp1, _, _ in tp.enumfields():
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self._do_collect_type(self._field_type(tp, name1, tp1))
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else:
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for _, x in tp._get_items():
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self._do_collect_type(x)
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def _generate(self, step_name):
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lst = self.ffi._parser._declarations.items()
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for name, (tp, quals) in sorted(lst):
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kind, realname = name.split(' ', 1)
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try:
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method = getattr(self, '_generate_cpy_%s_%s' % (kind,
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step_name))
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except AttributeError:
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raise ffiplatform.VerificationError(
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"not implemented in recompile(): %r" % name)
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try:
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self._current_quals = quals
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method(tp, realname)
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except Exception as e:
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model.attach_exception_info(e, name)
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raise
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# ----------
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ALL_STEPS = ["global", "field", "struct_union", "enum", "typename"]
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def collect_step_tables(self):
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# collect the declarations for '_cffi_globals', '_cffi_typenames', etc.
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self._lsts = {}
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for step_name in self.ALL_STEPS:
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self._lsts[step_name] = []
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self._seen_struct_unions = set()
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self._generate("ctx")
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self._add_missing_struct_unions()
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#
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for step_name in self.ALL_STEPS:
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lst = self._lsts[step_name]
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if step_name != "field":
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lst.sort(key=lambda entry: entry.name)
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self._lsts[step_name] = tuple(lst) # don't change any more
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#
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# check for a possible internal inconsistency: _cffi_struct_unions
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# should have been generated with exactly self._struct_unions
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lst = self._lsts["struct_union"]
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for tp, i in self._struct_unions.items():
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assert i < len(lst)
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assert lst[i].name == tp.name
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assert len(lst) == len(self._struct_unions)
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# same with enums
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lst = self._lsts["enum"]
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for tp, i in self._enums.items():
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assert i < len(lst)
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assert lst[i].name == tp.name
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assert len(lst) == len(self._enums)
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# ----------
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def _prnt(self, what=''):
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self._f.write(what + '\n')
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def write_source_to_f(self, f, preamble):
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if self.target_is_python:
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assert preamble is None
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self.write_py_source_to_f(f)
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else:
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assert preamble is not None
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self.write_c_source_to_f(f, preamble)
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def _rel_readlines(self, filename):
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g = open(os.path.join(os.path.dirname(__file__), filename), 'r')
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lines = g.readlines()
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g.close()
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return lines
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def write_c_source_to_f(self, f, preamble):
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self._f = f
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prnt = self._prnt
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#
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# first the '#include' (actually done by inlining the file's content)
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lines = self._rel_readlines('_cffi_include.h')
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i = lines.index('#include "parse_c_type.h"\n')
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lines[i:i+1] = self._rel_readlines('parse_c_type.h')
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prnt(''.join(lines))
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#
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# then paste the C source given by the user, verbatim.
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prnt('/************************************************************/')
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prnt()
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prnt(preamble)
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prnt()
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prnt('/************************************************************/')
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prnt()
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#
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# the declaration of '_cffi_types'
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prnt('static void *_cffi_types[] = {')
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typeindex2type = dict([(i, tp) for (tp, i) in self._typesdict.items()])
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for i, op in enumerate(self.cffi_types):
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comment = ''
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if i in typeindex2type:
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comment = ' // ' + typeindex2type[i]._get_c_name()
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prnt('/* %2d */ %s,%s' % (i, op.as_c_expr(), comment))
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if not self.cffi_types:
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prnt(' 0')
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prnt('};')
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prnt()
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#
|
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# call generate_cpy_xxx_decl(), for every xxx found from
|
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# ffi._parser._declarations. This generates all the functions.
|
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self._seen_constants = set()
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self._generate("decl")
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#
|
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# the declaration of '_cffi_globals' and '_cffi_typenames'
|
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nums = {}
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for step_name in self.ALL_STEPS:
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lst = self._lsts[step_name]
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nums[step_name] = len(lst)
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if nums[step_name] > 0:
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prnt('static const struct _cffi_%s_s _cffi_%ss[] = {' % (
|
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step_name, step_name))
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for entry in lst:
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prnt(entry.as_c_expr())
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prnt('};')
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prnt()
|
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#
|
||
|
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# the declaration of '_cffi_includes'
|
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if self.ffi._included_ffis:
|
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prnt('static const char * const _cffi_includes[] = {')
|
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for ffi_to_include in self.ffi._included_ffis:
|
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try:
|
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included_module_name, included_source = (
|
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ffi_to_include._assigned_source[:2])
|
||
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except AttributeError:
|
||
|
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raise ffiplatform.VerificationError(
|
||
|
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"ffi object %r includes %r, but the latter has not "
|
||
|
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"been prepared with set_source()" % (
|
||
|
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self.ffi, ffi_to_include,))
|
||
|
|
if included_source is None:
|
||
|
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raise ffiplatform.VerificationError(
|
||
|
|
"not implemented yet: ffi.include() of a Python-based "
|
||
|
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"ffi inside a C-based ffi")
|
||
|
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prnt(' "%s",' % (included_module_name,))
|
||
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prnt(' NULL')
|
||
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prnt('};')
|
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prnt()
|
||
|
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#
|
||
|
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# the declaration of '_cffi_type_context'
|
||
|
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prnt('static const struct _cffi_type_context_s _cffi_type_context = {')
|
||
|
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prnt(' _cffi_types,')
|
||
|
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for step_name in self.ALL_STEPS:
|
||
|
|
if nums[step_name] > 0:
|
||
|
|
prnt(' _cffi_%ss,' % step_name)
|
||
|
|
else:
|
||
|
|
prnt(' NULL, /* no %ss */' % step_name)
|
||
|
|
for step_name in self.ALL_STEPS:
|
||
|
|
if step_name != "field":
|
||
|
|
prnt(' %d, /* num_%ss */' % (nums[step_name], step_name))
|
||
|
|
if self.ffi._included_ffis:
|
||
|
|
prnt(' _cffi_includes,')
|
||
|
|
else:
|
||
|
|
prnt(' NULL, /* no includes */')
|
||
|
|
prnt(' %d, /* num_types */' % (len(self.cffi_types),))
|
||
|
|
prnt(' 0, /* flags */')
|
||
|
|
prnt('};')
|
||
|
|
prnt()
|
||
|
|
#
|
||
|
|
# the init function
|
||
|
|
base_module_name = self.module_name.split('.')[-1]
|
||
|
|
prnt('#ifdef PYPY_VERSION')
|
||
|
|
prnt('PyMODINIT_FUNC')
|
||
|
|
prnt('_cffi_pypyinit_%s(const void *p[])' % (base_module_name,))
|
||
|
|
prnt('{')
|
||
|
|
prnt(' p[0] = (const void *)%s;' % VERSION)
|
||
|
|
prnt(' p[1] = &_cffi_type_context;')
|
||
|
|
prnt('}')
|
||
|
|
# on Windows, distutils insists on putting init_cffi_xyz in
|
||
|
|
# 'export_symbols', so instead of fighting it, just give up and
|
||
|
|
# give it one
|
||
|
|
prnt('# ifdef _MSC_VER')
|
||
|
|
prnt(' PyMODINIT_FUNC')
|
||
|
|
prnt('# if PY_MAJOR_VERSION >= 3')
|
||
|
|
prnt(' PyInit_%s(void) { return NULL; }' % (base_module_name,))
|
||
|
|
prnt('# else')
|
||
|
|
prnt(' init%s(void) { }' % (base_module_name,))
|
||
|
|
prnt('# endif')
|
||
|
|
prnt('# endif')
|
||
|
|
prnt('#elif PY_MAJOR_VERSION >= 3')
|
||
|
|
prnt('PyMODINIT_FUNC')
|
||
|
|
prnt('PyInit_%s(void)' % (base_module_name,))
|
||
|
|
prnt('{')
|
||
|
|
prnt(' return _cffi_init("%s", %s, &_cffi_type_context);' % (
|
||
|
|
self.module_name, VERSION))
|
||
|
|
prnt('}')
|
||
|
|
prnt('#else')
|
||
|
|
prnt('PyMODINIT_FUNC')
|
||
|
|
prnt('init%s(void)' % (base_module_name,))
|
||
|
|
prnt('{')
|
||
|
|
prnt(' _cffi_init("%s", %s, &_cffi_type_context);' % (
|
||
|
|
self.module_name, VERSION))
|
||
|
|
prnt('}')
|
||
|
|
prnt('#endif')
|
||
|
|
|
||
|
|
def _to_py(self, x):
|
||
|
|
if isinstance(x, str):
|
||
|
|
return "b'%s'" % (x,)
|
||
|
|
if isinstance(x, (list, tuple)):
|
||
|
|
rep = [self._to_py(item) for item in x]
|
||
|
|
if len(rep) == 1:
|
||
|
|
rep.append('')
|
||
|
|
return "(%s)" % (','.join(rep),)
|
||
|
|
return x.as_python_expr() # Py2: unicode unexpected; Py3: bytes unexp.
|
||
|
|
|
||
|
|
def write_py_source_to_f(self, f):
|
||
|
|
self._f = f
|
||
|
|
prnt = self._prnt
|
||
|
|
#
|
||
|
|
# header
|
||
|
|
prnt("# auto-generated file")
|
||
|
|
prnt("import _cffi_backend")
|
||
|
|
#
|
||
|
|
# the 'import' of the included ffis
|
||
|
|
num_includes = len(self.ffi._included_ffis or ())
|
||
|
|
for i in range(num_includes):
|
||
|
|
ffi_to_include = self.ffi._included_ffis[i]
|
||
|
|
try:
|
||
|
|
included_module_name, included_source = (
|
||
|
|
ffi_to_include._assigned_source[:2])
|
||
|
|
except AttributeError:
|
||
|
|
raise ffiplatform.VerificationError(
|
||
|
|
"ffi object %r includes %r, but the latter has not "
|
||
|
|
"been prepared with set_source()" % (
|
||
|
|
self.ffi, ffi_to_include,))
|
||
|
|
if included_source is not None:
|
||
|
|
raise ffiplatform.VerificationError(
|
||
|
|
"not implemented yet: ffi.include() of a C-based "
|
||
|
|
"ffi inside a Python-based ffi")
|
||
|
|
prnt('from %s import ffi as _ffi%d' % (included_module_name, i))
|
||
|
|
prnt()
|
||
|
|
prnt("ffi = _cffi_backend.FFI('%s'," % (self.module_name,))
|
||
|
|
prnt(" _version = %s," % (VERSION,))
|
||
|
|
#
|
||
|
|
# the '_types' keyword argument
|
||
|
|
self.cffi_types = tuple(self.cffi_types) # don't change any more
|
||
|
|
types_lst = [op.as_python_bytes() for op in self.cffi_types]
|
||
|
|
prnt(' _types = %s,' % (self._to_py(''.join(types_lst)),))
|
||
|
|
typeindex2type = dict([(i, tp) for (tp, i) in self._typesdict.items()])
|
||
|
|
#
|
||
|
|
# the keyword arguments from ALL_STEPS
|
||
|
|
for step_name in self.ALL_STEPS:
|
||
|
|
lst = self._lsts[step_name]
|
||
|
|
if len(lst) > 0 and step_name != "field":
|
||
|
|
prnt(' _%ss = %s,' % (step_name, self._to_py(lst)))
|
||
|
|
#
|
||
|
|
# the '_includes' keyword argument
|
||
|
|
if num_includes > 0:
|
||
|
|
prnt(' _includes = (%s,),' % (
|
||
|
|
', '.join(['_ffi%d' % i for i in range(num_includes)]),))
|
||
|
|
#
|
||
|
|
# the footer
|
||
|
|
prnt(')')
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
|
||
|
|
def _gettypenum(self, type):
|
||
|
|
# a KeyError here is a bug. please report it! :-)
|
||
|
|
return self._typesdict[type]
|
||
|
|
|
||
|
|
def _convert_funcarg_to_c(self, tp, fromvar, tovar, errcode):
|
||
|
|
extraarg = ''
|
||
|
|
if isinstance(tp, model.BasePrimitiveType):
|
||
|
|
if tp.is_integer_type() and tp.name != '_Bool':
|
||
|
|
converter = '_cffi_to_c_int'
|
||
|
|
extraarg = ', %s' % tp.name
|
||
|
|
elif isinstance(tp, model.UnknownFloatType):
|
||
|
|
# don't check with is_float_type(): it may be a 'long
|
||
|
|
# double' here, and _cffi_to_c_double would loose precision
|
||
|
|
converter = '(%s)_cffi_to_c_double' % (tp.get_c_name(''),)
|
||
|
|
else:
|
||
|
|
converter = '(%s)_cffi_to_c_%s' % (tp.get_c_name(''),
|
||
|
|
tp.name.replace(' ', '_'))
|
||
|
|
errvalue = '-1'
|
||
|
|
#
|
||
|
|
elif isinstance(tp, model.PointerType):
|
||
|
|
self._convert_funcarg_to_c_ptr_or_array(tp, fromvar,
|
||
|
|
tovar, errcode)
|
||
|
|
return
|
||
|
|
#
|
||
|
|
elif isinstance(tp, (model.StructOrUnion, model.EnumType)):
|
||
|
|
# a struct (not a struct pointer) as a function argument
|
||
|
|
self._prnt(' if (_cffi_to_c((char *)&%s, _cffi_type(%d), %s) < 0)'
|
||
|
|
% (tovar, self._gettypenum(tp), fromvar))
|
||
|
|
self._prnt(' %s;' % errcode)
|
||
|
|
return
|
||
|
|
#
|
||
|
|
elif isinstance(tp, model.FunctionPtrType):
|
||
|
|
converter = '(%s)_cffi_to_c_pointer' % tp.get_c_name('')
|
||
|
|
extraarg = ', _cffi_type(%d)' % self._gettypenum(tp)
|
||
|
|
errvalue = 'NULL'
|
||
|
|
#
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(tp)
|
||
|
|
#
|
||
|
|
self._prnt(' %s = %s(%s%s);' % (tovar, converter, fromvar, extraarg))
|
||
|
|
self._prnt(' if (%s == (%s)%s && PyErr_Occurred())' % (
|
||
|
|
tovar, tp.get_c_name(''), errvalue))
|
||
|
|
self._prnt(' %s;' % errcode)
|
||
|
|
|
||
|
|
def _extra_local_variables(self, tp, localvars):
|
||
|
|
if isinstance(tp, model.PointerType):
|
||
|
|
localvars.add('Py_ssize_t datasize')
|
||
|
|
|
||
|
|
def _convert_funcarg_to_c_ptr_or_array(self, tp, fromvar, tovar, errcode):
|
||
|
|
self._prnt(' datasize = _cffi_prepare_pointer_call_argument(')
|
||
|
|
self._prnt(' _cffi_type(%d), %s, (char **)&%s);' % (
|
||
|
|
self._gettypenum(tp), fromvar, tovar))
|
||
|
|
self._prnt(' if (datasize != 0) {')
|
||
|
|
self._prnt(' if (datasize < 0)')
|
||
|
|
self._prnt(' %s;' % errcode)
|
||
|
|
self._prnt(' %s = (%s)alloca((size_t)datasize);' % (
|
||
|
|
tovar, tp.get_c_name('')))
|
||
|
|
self._prnt(' memset((void *)%s, 0, (size_t)datasize);' % (tovar,))
|
||
|
|
self._prnt(' if (_cffi_convert_array_from_object('
|
||
|
|
'(char *)%s, _cffi_type(%d), %s) < 0)' % (
|
||
|
|
tovar, self._gettypenum(tp), fromvar))
|
||
|
|
self._prnt(' %s;' % errcode)
|
||
|
|
self._prnt(' }')
|
||
|
|
|
||
|
|
def _convert_expr_from_c(self, tp, var, context):
|
||
|
|
if isinstance(tp, model.BasePrimitiveType):
|
||
|
|
if tp.is_integer_type():
|
||
|
|
return '_cffi_from_c_int(%s, %s)' % (var, tp.name)
|
||
|
|
elif isinstance(tp, model.UnknownFloatType):
|
||
|
|
return '_cffi_from_c_double(%s)' % (var,)
|
||
|
|
elif tp.name != 'long double':
|
||
|
|
return '_cffi_from_c_%s(%s)' % (tp.name.replace(' ', '_'), var)
|
||
|
|
else:
|
||
|
|
return '_cffi_from_c_deref((char *)&%s, _cffi_type(%d))' % (
|
||
|
|
var, self._gettypenum(tp))
|
||
|
|
elif isinstance(tp, (model.PointerType, model.FunctionPtrType)):
|
||
|
|
return '_cffi_from_c_pointer((char *)%s, _cffi_type(%d))' % (
|
||
|
|
var, self._gettypenum(tp))
|
||
|
|
elif isinstance(tp, model.ArrayType):
|
||
|
|
return '_cffi_from_c_pointer((char *)%s, _cffi_type(%d))' % (
|
||
|
|
var, self._gettypenum(model.PointerType(tp.item)))
|
||
|
|
elif isinstance(tp, model.StructType):
|
||
|
|
if tp.fldnames is None:
|
||
|
|
raise TypeError("'%s' is used as %s, but is opaque" % (
|
||
|
|
tp._get_c_name(), context))
|
||
|
|
return '_cffi_from_c_struct((char *)&%s, _cffi_type(%d))' % (
|
||
|
|
var, self._gettypenum(tp))
|
||
|
|
elif isinstance(tp, model.EnumType):
|
||
|
|
return '_cffi_from_c_deref((char *)&%s, _cffi_type(%d))' % (
|
||
|
|
var, self._gettypenum(tp))
|
||
|
|
else:
|
||
|
|
raise NotImplementedError(tp)
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# typedefs
|
||
|
|
|
||
|
|
def _generate_cpy_typedef_collecttype(self, tp, name):
|
||
|
|
self._do_collect_type(tp)
|
||
|
|
|
||
|
|
def _generate_cpy_typedef_decl(self, tp, name):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def _typedef_ctx(self, tp, name):
|
||
|
|
type_index = self._typesdict[tp]
|
||
|
|
self._lsts["typename"].append(TypenameExpr(name, type_index))
|
||
|
|
|
||
|
|
def _generate_cpy_typedef_ctx(self, tp, name):
|
||
|
|
self._typedef_ctx(tp, name)
|
||
|
|
if getattr(tp, "origin", None) == "unknown_type":
|
||
|
|
self._struct_ctx(tp, tp.name, approxname=None)
|
||
|
|
elif isinstance(tp, model.NamedPointerType):
|
||
|
|
self._struct_ctx(tp.totype, tp.totype.name, approxname=tp.name,
|
||
|
|
named_ptr=tp)
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# function declarations
|
||
|
|
|
||
|
|
def _generate_cpy_function_collecttype(self, tp, name):
|
||
|
|
self._do_collect_type(tp.as_raw_function())
|
||
|
|
if tp.ellipsis and not self.target_is_python:
|
||
|
|
self._do_collect_type(tp)
|
||
|
|
|
||
|
|
def _generate_cpy_function_decl(self, tp, name):
|
||
|
|
assert not self.target_is_python
|
||
|
|
assert isinstance(tp, model.FunctionPtrType)
|
||
|
|
if tp.ellipsis:
|
||
|
|
# cannot support vararg functions better than this: check for its
|
||
|
|
# exact type (including the fixed arguments), and build it as a
|
||
|
|
# constant function pointer (no CPython wrapper)
|
||
|
|
self._generate_cpy_constant_decl(tp, name)
|
||
|
|
return
|
||
|
|
prnt = self._prnt
|
||
|
|
numargs = len(tp.args)
|
||
|
|
if numargs == 0:
|
||
|
|
argname = 'noarg'
|
||
|
|
elif numargs == 1:
|
||
|
|
argname = 'arg0'
|
||
|
|
else:
|
||
|
|
argname = 'args'
|
||
|
|
#
|
||
|
|
# ------------------------------
|
||
|
|
# the 'd' version of the function, only for addressof(lib, 'func')
|
||
|
|
arguments = []
|
||
|
|
call_arguments = []
|
||
|
|
context = 'argument of %s' % name
|
||
|
|
for i, type in enumerate(tp.args):
|
||
|
|
arguments.append(type.get_c_name(' x%d' % i, context))
|
||
|
|
call_arguments.append('x%d' % i)
|
||
|
|
repr_arguments = ', '.join(arguments)
|
||
|
|
repr_arguments = repr_arguments or 'void'
|
||
|
|
if tp.abi:
|
||
|
|
abi = tp.abi + ' '
|
||
|
|
else:
|
||
|
|
abi = ''
|
||
|
|
name_and_arguments = '%s_cffi_d_%s(%s)' % (abi, name, repr_arguments)
|
||
|
|
prnt('static %s' % (tp.result.get_c_name(name_and_arguments),))
|
||
|
|
prnt('{')
|
||
|
|
call_arguments = ', '.join(call_arguments)
|
||
|
|
result_code = 'return '
|
||
|
|
if isinstance(tp.result, model.VoidType):
|
||
|
|
result_code = ''
|
||
|
|
prnt(' %s%s(%s);' % (result_code, name, call_arguments))
|
||
|
|
prnt('}')
|
||
|
|
#
|
||
|
|
prnt('#ifndef PYPY_VERSION') # ------------------------------
|
||
|
|
#
|
||
|
|
prnt('static PyObject *')
|
||
|
|
prnt('_cffi_f_%s(PyObject *self, PyObject *%s)' % (name, argname))
|
||
|
|
prnt('{')
|
||
|
|
#
|
||
|
|
context = 'argument of %s' % name
|
||
|
|
for i, type in enumerate(tp.args):
|
||
|
|
arg = type.get_c_name(' x%d' % i, context)
|
||
|
|
prnt(' %s;' % arg)
|
||
|
|
#
|
||
|
|
localvars = set()
|
||
|
|
for type in tp.args:
|
||
|
|
self._extra_local_variables(type, localvars)
|
||
|
|
for decl in localvars:
|
||
|
|
prnt(' %s;' % (decl,))
|
||
|
|
#
|
||
|
|
if not isinstance(tp.result, model.VoidType):
|
||
|
|
result_code = 'result = '
|
||
|
|
context = 'result of %s' % name
|
||
|
|
result_decl = ' %s;' % tp.result.get_c_name(' result', context)
|
||
|
|
prnt(result_decl)
|
||
|
|
else:
|
||
|
|
result_decl = None
|
||
|
|
result_code = ''
|
||
|
|
#
|
||
|
|
if len(tp.args) > 1:
|
||
|
|
rng = range(len(tp.args))
|
||
|
|
for i in rng:
|
||
|
|
prnt(' PyObject *arg%d;' % i)
|
||
|
|
prnt(' PyObject **aa;')
|
||
|
|
prnt()
|
||
|
|
prnt(' aa = _cffi_unpack_args(args, %d, "%s");' % (len(rng), name))
|
||
|
|
prnt(' if (aa == NULL)')
|
||
|
|
prnt(' return NULL;')
|
||
|
|
for i in rng:
|
||
|
|
prnt(' arg%d = aa[%d];' % (i, i))
|
||
|
|
prnt()
|
||
|
|
#
|
||
|
|
for i, type in enumerate(tp.args):
|
||
|
|
self._convert_funcarg_to_c(type, 'arg%d' % i, 'x%d' % i,
|
||
|
|
'return NULL')
|
||
|
|
prnt()
|
||
|
|
#
|
||
|
|
prnt(' Py_BEGIN_ALLOW_THREADS')
|
||
|
|
prnt(' _cffi_restore_errno();')
|
||
|
|
call_arguments = ['x%d' % i for i in range(len(tp.args))]
|
||
|
|
call_arguments = ', '.join(call_arguments)
|
||
|
|
prnt(' { %s%s(%s); }' % (result_code, name, call_arguments))
|
||
|
|
prnt(' _cffi_save_errno();')
|
||
|
|
prnt(' Py_END_ALLOW_THREADS')
|
||
|
|
prnt()
|
||
|
|
#
|
||
|
|
prnt(' (void)self; /* unused */')
|
||
|
|
if numargs == 0:
|
||
|
|
prnt(' (void)noarg; /* unused */')
|
||
|
|
if result_code:
|
||
|
|
prnt(' return %s;' %
|
||
|
|
self._convert_expr_from_c(tp.result, 'result', 'result type'))
|
||
|
|
else:
|
||
|
|
prnt(' Py_INCREF(Py_None);')
|
||
|
|
prnt(' return Py_None;')
|
||
|
|
prnt('}')
|
||
|
|
#
|
||
|
|
prnt('#else') # ------------------------------
|
||
|
|
#
|
||
|
|
# the PyPy version: need to replace struct/union arguments with
|
||
|
|
# pointers, and if the result is a struct/union, insert a first
|
||
|
|
# arg that is a pointer to the result.
|
||
|
|
difference = False
|
||
|
|
arguments = []
|
||
|
|
call_arguments = []
|
||
|
|
context = 'argument of %s' % name
|
||
|
|
for i, type in enumerate(tp.args):
|
||
|
|
indirection = ''
|
||
|
|
if isinstance(type, model.StructOrUnion):
|
||
|
|
indirection = '*'
|
||
|
|
difference = True
|
||
|
|
arg = type.get_c_name(' %sx%d' % (indirection, i), context)
|
||
|
|
arguments.append(arg)
|
||
|
|
call_arguments.append('%sx%d' % (indirection, i))
|
||
|
|
tp_result = tp.result
|
||
|
|
if isinstance(tp_result, model.StructOrUnion):
|
||
|
|
context = 'result of %s' % name
|
||
|
|
arg = tp_result.get_c_name(' *result', context)
|
||
|
|
arguments.insert(0, arg)
|
||
|
|
tp_result = model.void_type
|
||
|
|
result_decl = None
|
||
|
|
result_code = '*result = '
|
||
|
|
difference = True
|
||
|
|
if difference:
|
||
|
|
repr_arguments = ', '.join(arguments)
|
||
|
|
repr_arguments = repr_arguments or 'void'
|
||
|
|
name_and_arguments = '%s_cffi_f_%s(%s)' % (abi, name,
|
||
|
|
repr_arguments)
|
||
|
|
prnt('static %s' % (tp_result.get_c_name(name_and_arguments),))
|
||
|
|
prnt('{')
|
||
|
|
if result_decl:
|
||
|
|
prnt(result_decl)
|
||
|
|
call_arguments = ', '.join(call_arguments)
|
||
|
|
prnt(' { %s%s(%s); }' % (result_code, name, call_arguments))
|
||
|
|
if result_decl:
|
||
|
|
prnt(' return result;')
|
||
|
|
prnt('}')
|
||
|
|
else:
|
||
|
|
prnt('# define _cffi_f_%s _cffi_d_%s' % (name, name))
|
||
|
|
#
|
||
|
|
prnt('#endif') # ------------------------------
|
||
|
|
prnt()
|
||
|
|
|
||
|
|
def _generate_cpy_function_ctx(self, tp, name):
|
||
|
|
if tp.ellipsis and not self.target_is_python:
|
||
|
|
self._generate_cpy_constant_ctx(tp, name)
|
||
|
|
return
|
||
|
|
type_index = self._typesdict[tp.as_raw_function()]
|
||
|
|
numargs = len(tp.args)
|
||
|
|
if self.target_is_python:
|
||
|
|
meth_kind = OP_DLOPEN_FUNC
|
||
|
|
elif numargs == 0:
|
||
|
|
meth_kind = OP_CPYTHON_BLTN_N # 'METH_NOARGS'
|
||
|
|
elif numargs == 1:
|
||
|
|
meth_kind = OP_CPYTHON_BLTN_O # 'METH_O'
|
||
|
|
else:
|
||
|
|
meth_kind = OP_CPYTHON_BLTN_V # 'METH_VARARGS'
|
||
|
|
self._lsts["global"].append(
|
||
|
|
GlobalExpr(name, '_cffi_f_%s' % name,
|
||
|
|
CffiOp(meth_kind, type_index),
|
||
|
|
size='_cffi_d_%s' % name))
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# named structs or unions
|
||
|
|
|
||
|
|
def _field_type(self, tp_struct, field_name, tp_field):
|
||
|
|
if isinstance(tp_field, model.ArrayType):
|
||
|
|
actual_length = tp_field.length
|
||
|
|
if actual_length == '...':
|
||
|
|
ptr_struct_name = tp_struct.get_c_name('*')
|
||
|
|
actual_length = '_cffi_array_len(((%s)0)->%s)' % (
|
||
|
|
ptr_struct_name, field_name)
|
||
|
|
tp_item = self._field_type(tp_struct, '%s[0]' % field_name,
|
||
|
|
tp_field.item)
|
||
|
|
tp_field = model.ArrayType(tp_item, actual_length)
|
||
|
|
return tp_field
|
||
|
|
|
||
|
|
def _struct_collecttype(self, tp):
|
||
|
|
self._do_collect_type(tp)
|
||
|
|
|
||
|
|
def _struct_decl(self, tp, cname, approxname):
|
||
|
|
if tp.fldtypes is None:
|
||
|
|
return
|
||
|
|
prnt = self._prnt
|
||
|
|
checkfuncname = '_cffi_checkfld_%s' % (approxname,)
|
||
|
|
prnt('_CFFI_UNUSED_FN')
|
||
|
|
prnt('static void %s(%s *p)' % (checkfuncname, cname))
|
||
|
|
prnt('{')
|
||
|
|
prnt(' /* only to generate compile-time warnings or errors */')
|
||
|
|
prnt(' (void)p;')
|
||
|
|
for fname, ftype, fbitsize, fqual in tp.enumfields():
|
||
|
|
try:
|
||
|
|
if ftype.is_integer_type() or fbitsize >= 0:
|
||
|
|
# accept all integers, but complain on float or double
|
||
|
|
prnt(" (void)((p->%s) << 1); /* check that '%s.%s' is "
|
||
|
|
"an integer */" % (fname, cname, fname))
|
||
|
|
continue
|
||
|
|
# only accept exactly the type declared, except that '[]'
|
||
|
|
# is interpreted as a '*' and so will match any array length.
|
||
|
|
# (It would also match '*', but that's harder to detect...)
|
||
|
|
while (isinstance(ftype, model.ArrayType)
|
||
|
|
and (ftype.length is None or ftype.length == '...')):
|
||
|
|
ftype = ftype.item
|
||
|
|
fname = fname + '[0]'
|
||
|
|
prnt(' { %s = &p->%s; (void)tmp; }' % (
|
||
|
|
ftype.get_c_name('*tmp', 'field %r'%fname, quals=fqual),
|
||
|
|
fname))
|
||
|
|
except ffiplatform.VerificationError as e:
|
||
|
|
prnt(' /* %s */' % str(e)) # cannot verify it, ignore
|
||
|
|
prnt('}')
|
||
|
|
prnt('struct _cffi_align_%s { char x; %s y; };' % (approxname, cname))
|
||
|
|
prnt()
|
||
|
|
|
||
|
|
def _struct_ctx(self, tp, cname, approxname, named_ptr=None):
|
||
|
|
type_index = self._typesdict[tp]
|
||
|
|
reason_for_not_expanding = None
|
||
|
|
flags = []
|
||
|
|
if isinstance(tp, model.UnionType):
|
||
|
|
flags.append("_CFFI_F_UNION")
|
||
|
|
if tp.fldtypes is None:
|
||
|
|
flags.append("_CFFI_F_OPAQUE")
|
||
|
|
reason_for_not_expanding = "opaque"
|
||
|
|
if (tp not in self.ffi._parser._included_declarations and
|
||
|
|
(named_ptr is None or
|
||
|
|
named_ptr not in self.ffi._parser._included_declarations)):
|
||
|
|
if tp.fldtypes is None:
|
||
|
|
pass # opaque
|
||
|
|
elif tp.partial or tp.has_anonymous_struct_fields():
|
||
|
|
pass # field layout obtained silently from the C compiler
|
||
|
|
else:
|
||
|
|
flags.append("_CFFI_F_CHECK_FIELDS")
|
||
|
|
if tp.packed:
|
||
|
|
flags.append("_CFFI_F_PACKED")
|
||
|
|
else:
|
||
|
|
flags.append("_CFFI_F_EXTERNAL")
|
||
|
|
reason_for_not_expanding = "external"
|
||
|
|
flags = '|'.join(flags) or '0'
|
||
|
|
c_fields = []
|
||
|
|
if reason_for_not_expanding is None:
|
||
|
|
enumfields = list(tp.enumfields())
|
||
|
|
for fldname, fldtype, fbitsize, fqual in enumfields:
|
||
|
|
fldtype = self._field_type(tp, fldname, fldtype)
|
||
|
|
# cname is None for _add_missing_struct_unions() only
|
||
|
|
op = OP_NOOP
|
||
|
|
if fbitsize >= 0:
|
||
|
|
op = OP_BITFIELD
|
||
|
|
size = '%d /* bits */' % fbitsize
|
||
|
|
elif cname is None or (
|
||
|
|
isinstance(fldtype, model.ArrayType) and
|
||
|
|
fldtype.length is None):
|
||
|
|
size = '(size_t)-1'
|
||
|
|
else:
|
||
|
|
size = 'sizeof(((%s)0)->%s)' % (
|
||
|
|
tp.get_c_name('*') if named_ptr is None
|
||
|
|
else named_ptr.name,
|
||
|
|
fldname)
|
||
|
|
if cname is None or fbitsize >= 0:
|
||
|
|
offset = '(size_t)-1'
|
||
|
|
elif named_ptr is not None:
|
||
|
|
offset = '((char *)&((%s)0)->%s) - (char *)0' % (
|
||
|
|
named_ptr.name, fldname)
|
||
|
|
else:
|
||
|
|
offset = 'offsetof(%s, %s)' % (tp.get_c_name(''), fldname)
|
||
|
|
c_fields.append(
|
||
|
|
FieldExpr(fldname, offset, size, fbitsize,
|
||
|
|
CffiOp(op, self._typesdict[fldtype])))
|
||
|
|
first_field_index = len(self._lsts["field"])
|
||
|
|
self._lsts["field"].extend(c_fields)
|
||
|
|
#
|
||
|
|
if cname is None: # unknown name, for _add_missing_struct_unions
|
||
|
|
size = '(size_t)-2'
|
||
|
|
align = -2
|
||
|
|
comment = "unnamed"
|
||
|
|
else:
|
||
|
|
if named_ptr is not None:
|
||
|
|
size = 'sizeof(*(%s)0)' % (named_ptr.name,)
|
||
|
|
align = '-1 /* unknown alignment */'
|
||
|
|
else:
|
||
|
|
size = 'sizeof(%s)' % (cname,)
|
||
|
|
align = 'offsetof(struct _cffi_align_%s, y)' % (approxname,)
|
||
|
|
comment = None
|
||
|
|
else:
|
||
|
|
size = '(size_t)-1'
|
||
|
|
align = -1
|
||
|
|
first_field_index = -1
|
||
|
|
comment = reason_for_not_expanding
|
||
|
|
self._lsts["struct_union"].append(
|
||
|
|
StructUnionExpr(tp.name, type_index, flags, size, align, comment,
|
||
|
|
first_field_index, c_fields))
|
||
|
|
self._seen_struct_unions.add(tp)
|
||
|
|
|
||
|
|
def _add_missing_struct_unions(self):
|
||
|
|
# not very nice, but some struct declarations might be missing
|
||
|
|
# because they don't have any known C name. Check that they are
|
||
|
|
# not partial (we can't complete or verify them!) and emit them
|
||
|
|
# anonymously.
|
||
|
|
lst = list(self._struct_unions.items())
|
||
|
|
lst.sort(key=lambda tp_order: tp_order[1])
|
||
|
|
for tp, order in lst:
|
||
|
|
if tp not in self._seen_struct_unions:
|
||
|
|
if tp.partial:
|
||
|
|
raise NotImplementedError("internal inconsistency: %r is "
|
||
|
|
"partial but was not seen at "
|
||
|
|
"this point" % (tp,))
|
||
|
|
if tp.name.startswith('$') and tp.name[1:].isdigit():
|
||
|
|
approxname = tp.name[1:]
|
||
|
|
elif tp.name == '_IO_FILE' and tp.forcename == 'FILE':
|
||
|
|
approxname = 'FILE'
|
||
|
|
self._typedef_ctx(tp, 'FILE')
|
||
|
|
else:
|
||
|
|
raise NotImplementedError("internal inconsistency: %r" %
|
||
|
|
(tp,))
|
||
|
|
self._struct_ctx(tp, None, approxname)
|
||
|
|
|
||
|
|
def _generate_cpy_struct_collecttype(self, tp, name):
|
||
|
|
self._struct_collecttype(tp)
|
||
|
|
_generate_cpy_union_collecttype = _generate_cpy_struct_collecttype
|
||
|
|
|
||
|
|
def _struct_names(self, tp):
|
||
|
|
cname = tp.get_c_name('')
|
||
|
|
if ' ' in cname:
|
||
|
|
return cname, cname.replace(' ', '_')
|
||
|
|
else:
|
||
|
|
return cname, '_' + cname
|
||
|
|
|
||
|
|
def _generate_cpy_struct_decl(self, tp, name):
|
||
|
|
self._struct_decl(tp, *self._struct_names(tp))
|
||
|
|
_generate_cpy_union_decl = _generate_cpy_struct_decl
|
||
|
|
|
||
|
|
def _generate_cpy_struct_ctx(self, tp, name):
|
||
|
|
self._struct_ctx(tp, *self._struct_names(tp))
|
||
|
|
_generate_cpy_union_ctx = _generate_cpy_struct_ctx
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# 'anonymous' declarations. These are produced for anonymous structs
|
||
|
|
# or unions; the 'name' is obtained by a typedef.
|
||
|
|
|
||
|
|
def _generate_cpy_anonymous_collecttype(self, tp, name):
|
||
|
|
if isinstance(tp, model.EnumType):
|
||
|
|
self._generate_cpy_enum_collecttype(tp, name)
|
||
|
|
else:
|
||
|
|
self._struct_collecttype(tp)
|
||
|
|
|
||
|
|
def _generate_cpy_anonymous_decl(self, tp, name):
|
||
|
|
if isinstance(tp, model.EnumType):
|
||
|
|
self._generate_cpy_enum_decl(tp)
|
||
|
|
else:
|
||
|
|
self._struct_decl(tp, name, 'typedef_' + name)
|
||
|
|
|
||
|
|
def _generate_cpy_anonymous_ctx(self, tp, name):
|
||
|
|
if isinstance(tp, model.EnumType):
|
||
|
|
self._enum_ctx(tp, name)
|
||
|
|
else:
|
||
|
|
self._struct_ctx(tp, name, 'typedef_' + name)
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# constants, declared with "static const ..."
|
||
|
|
|
||
|
|
def _generate_cpy_const(self, is_int, name, tp=None, category='const',
|
||
|
|
check_value=None):
|
||
|
|
if (category, name) in self._seen_constants:
|
||
|
|
raise ffiplatform.VerificationError(
|
||
|
|
"duplicate declaration of %s '%s'" % (category, name))
|
||
|
|
self._seen_constants.add((category, name))
|
||
|
|
#
|
||
|
|
prnt = self._prnt
|
||
|
|
funcname = '_cffi_%s_%s' % (category, name)
|
||
|
|
if is_int:
|
||
|
|
prnt('static int %s(unsigned long long *o)' % funcname)
|
||
|
|
prnt('{')
|
||
|
|
prnt(' int n = (%s) <= 0;' % (name,))
|
||
|
|
prnt(' *o = (unsigned long long)((%s) << 0);'
|
||
|
|
' /* check that %s is an integer */' % (name, name))
|
||
|
|
if check_value is not None:
|
||
|
|
if check_value > 0:
|
||
|
|
check_value = '%dU' % (check_value,)
|
||
|
|
prnt(' if (!_cffi_check_int(*o, n, %s))' % (check_value,))
|
||
|
|
prnt(' n |= 2;')
|
||
|
|
prnt(' return n;')
|
||
|
|
prnt('}')
|
||
|
|
else:
|
||
|
|
assert check_value is None
|
||
|
|
prnt('static void %s(char *o)' % funcname)
|
||
|
|
prnt('{')
|
||
|
|
prnt(' *(%s)o = %s;' % (tp.get_c_name('*'), name))
|
||
|
|
prnt('}')
|
||
|
|
prnt()
|
||
|
|
|
||
|
|
def _generate_cpy_constant_collecttype(self, tp, name):
|
||
|
|
is_int = tp.is_integer_type()
|
||
|
|
if not is_int or self.target_is_python:
|
||
|
|
self._do_collect_type(tp)
|
||
|
|
|
||
|
|
def _generate_cpy_constant_decl(self, tp, name):
|
||
|
|
is_int = tp.is_integer_type()
|
||
|
|
self._generate_cpy_const(is_int, name, tp)
|
||
|
|
|
||
|
|
def _generate_cpy_constant_ctx(self, tp, name):
|
||
|
|
if not self.target_is_python and tp.is_integer_type():
|
||
|
|
type_op = CffiOp(OP_CONSTANT_INT, -1)
|
||
|
|
else:
|
||
|
|
if self.target_is_python:
|
||
|
|
const_kind = OP_DLOPEN_CONST
|
||
|
|
else:
|
||
|
|
const_kind = OP_CONSTANT
|
||
|
|
type_index = self._typesdict[tp]
|
||
|
|
type_op = CffiOp(const_kind, type_index)
|
||
|
|
self._lsts["global"].append(
|
||
|
|
GlobalExpr(name, '_cffi_const_%s' % name, type_op))
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# enums
|
||
|
|
|
||
|
|
def _generate_cpy_enum_collecttype(self, tp, name):
|
||
|
|
self._do_collect_type(tp)
|
||
|
|
|
||
|
|
def _generate_cpy_enum_decl(self, tp, name=None):
|
||
|
|
for enumerator in tp.enumerators:
|
||
|
|
self._generate_cpy_const(True, enumerator)
|
||
|
|
|
||
|
|
def _enum_ctx(self, tp, cname):
|
||
|
|
type_index = self._typesdict[tp]
|
||
|
|
type_op = CffiOp(OP_ENUM, -1)
|
||
|
|
if self.target_is_python:
|
||
|
|
tp.check_not_partial()
|
||
|
|
for enumerator, enumvalue in zip(tp.enumerators, tp.enumvalues):
|
||
|
|
self._lsts["global"].append(
|
||
|
|
GlobalExpr(enumerator, '_cffi_const_%s' % enumerator, type_op,
|
||
|
|
check_value=enumvalue))
|
||
|
|
#
|
||
|
|
if cname is not None and '$' not in cname and not self.target_is_python:
|
||
|
|
size = "sizeof(%s)" % cname
|
||
|
|
signed = "((%s)-1) <= 0" % cname
|
||
|
|
else:
|
||
|
|
basetp = tp.build_baseinttype(self.ffi, [])
|
||
|
|
size = self.ffi.sizeof(basetp)
|
||
|
|
signed = int(int(self.ffi.cast(basetp, -1)) < 0)
|
||
|
|
allenums = ",".join(tp.enumerators)
|
||
|
|
self._lsts["enum"].append(
|
||
|
|
EnumExpr(tp.name, type_index, size, signed, allenums))
|
||
|
|
|
||
|
|
def _generate_cpy_enum_ctx(self, tp, name):
|
||
|
|
self._enum_ctx(tp, tp._get_c_name())
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# macros: for now only for integers
|
||
|
|
|
||
|
|
def _generate_cpy_macro_collecttype(self, tp, name):
|
||
|
|
pass
|
||
|
|
|
||
|
|
def _generate_cpy_macro_decl(self, tp, name):
|
||
|
|
if tp == '...':
|
||
|
|
check_value = None
|
||
|
|
else:
|
||
|
|
check_value = tp # an integer
|
||
|
|
self._generate_cpy_const(True, name, check_value=check_value)
|
||
|
|
|
||
|
|
def _generate_cpy_macro_ctx(self, tp, name):
|
||
|
|
if tp == '...':
|
||
|
|
if self.target_is_python:
|
||
|
|
raise ffiplatform.VerificationError(
|
||
|
|
"cannot use the syntax '...' in '#define %s ...' when "
|
||
|
|
"using the ABI mode" % (name,))
|
||
|
|
check_value = None
|
||
|
|
else:
|
||
|
|
check_value = tp # an integer
|
||
|
|
type_op = CffiOp(OP_CONSTANT_INT, -1)
|
||
|
|
self._lsts["global"].append(
|
||
|
|
GlobalExpr(name, '_cffi_const_%s' % name, type_op,
|
||
|
|
check_value=check_value))
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# global variables
|
||
|
|
|
||
|
|
def _global_type(self, tp, global_name):
|
||
|
|
if isinstance(tp, model.ArrayType):
|
||
|
|
actual_length = tp.length
|
||
|
|
if actual_length == '...':
|
||
|
|
actual_length = '_cffi_array_len(%s)' % (global_name,)
|
||
|
|
tp_item = self._global_type(tp.item, '%s[0]' % global_name)
|
||
|
|
tp = model.ArrayType(tp_item, actual_length)
|
||
|
|
return tp
|
||
|
|
|
||
|
|
def _generate_cpy_variable_collecttype(self, tp, name):
|
||
|
|
self._do_collect_type(self._global_type(tp, name))
|
||
|
|
|
||
|
|
def _generate_cpy_variable_decl(self, tp, name):
|
||
|
|
prnt = self._prnt
|
||
|
|
tp = self._global_type(tp, name)
|
||
|
|
if isinstance(tp, model.ArrayType) and tp.length is None:
|
||
|
|
tp = tp.item
|
||
|
|
ampersand = ''
|
||
|
|
else:
|
||
|
|
ampersand = '&'
|
||
|
|
# This code assumes that casts from "tp *" to "void *" is a
|
||
|
|
# no-op, i.e. a function that returns a "tp *" can be called
|
||
|
|
# as if it returned a "void *". This should be generally true
|
||
|
|
# on any modern machine. The only exception to that rule (on
|
||
|
|
# uncommon architectures, and as far as I can tell) might be
|
||
|
|
# if 'tp' were a function type, but that is not possible here.
|
||
|
|
# (If 'tp' is a function _pointer_ type, then casts from "fn_t
|
||
|
|
# **" to "void *" are again no-ops, as far as I can tell.)
|
||
|
|
decl = '*_cffi_var_%s(void)' % (name,)
|
||
|
|
prnt('static ' + tp.get_c_name(decl, quals=self._current_quals))
|
||
|
|
prnt('{')
|
||
|
|
prnt(' return %s(%s);' % (ampersand, name))
|
||
|
|
prnt('}')
|
||
|
|
prnt()
|
||
|
|
|
||
|
|
def _generate_cpy_variable_ctx(self, tp, name):
|
||
|
|
tp = self._global_type(tp, name)
|
||
|
|
type_index = self._typesdict[tp]
|
||
|
|
if self.target_is_python:
|
||
|
|
op = OP_GLOBAL_VAR
|
||
|
|
else:
|
||
|
|
op = OP_GLOBAL_VAR_F
|
||
|
|
self._lsts["global"].append(
|
||
|
|
GlobalExpr(name, '_cffi_var_%s' % name, CffiOp(op, type_index)))
|
||
|
|
|
||
|
|
# ----------
|
||
|
|
# emitting the opcodes for individual types
|
||
|
|
|
||
|
|
def _emit_bytecode_VoidType(self, tp, index):
|
||
|
|
self.cffi_types[index] = CffiOp(OP_PRIMITIVE, PRIM_VOID)
|
||
|
|
|
||
|
|
def _emit_bytecode_PrimitiveType(self, tp, index):
|
||
|
|
prim_index = PRIMITIVE_TO_INDEX[tp.name]
|
||
|
|
self.cffi_types[index] = CffiOp(OP_PRIMITIVE, prim_index)
|
||
|
|
|
||
|
|
def _emit_bytecode_UnknownIntegerType(self, tp, index):
|
||
|
|
s = ('_cffi_prim_int(sizeof(%s), (\n'
|
||
|
|
' ((%s)-1) << 0 /* check that %s is an integer type */\n'
|
||
|
|
' ) <= 0)' % (tp.name, tp.name, tp.name))
|
||
|
|
self.cffi_types[index] = CffiOp(OP_PRIMITIVE, s)
|
||
|
|
|
||
|
|
def _emit_bytecode_UnknownFloatType(self, tp, index):
|
||
|
|
s = ('_cffi_prim_float(sizeof(%s) *\n'
|
||
|
|
' (((%s)1) / 2) * 2 /* integer => 0, float => 1 */\n'
|
||
|
|
' )' % (tp.name, tp.name))
|
||
|
|
self.cffi_types[index] = CffiOp(OP_PRIMITIVE, s)
|
||
|
|
|
||
|
|
def _emit_bytecode_RawFunctionType(self, tp, index):
|
||
|
|
self.cffi_types[index] = CffiOp(OP_FUNCTION, self._typesdict[tp.result])
|
||
|
|
index += 1
|
||
|
|
for tp1 in tp.args:
|
||
|
|
realindex = self._typesdict[tp1]
|
||
|
|
if index != realindex:
|
||
|
|
if isinstance(tp1, model.PrimitiveType):
|
||
|
|
self._emit_bytecode_PrimitiveType(tp1, index)
|
||
|
|
else:
|
||
|
|
self.cffi_types[index] = CffiOp(OP_NOOP, realindex)
|
||
|
|
index += 1
|
||
|
|
flags = int(tp.ellipsis)
|
||
|
|
if tp.abi is not None:
|
||
|
|
if tp.abi == '__stdcall':
|
||
|
|
flags |= 2
|
||
|
|
else:
|
||
|
|
raise NotImplementedError("abi=%r" % (tp.abi,))
|
||
|
|
self.cffi_types[index] = CffiOp(OP_FUNCTION_END, flags)
|
||
|
|
|
||
|
|
def _emit_bytecode_PointerType(self, tp, index):
|
||
|
|
self.cffi_types[index] = CffiOp(OP_POINTER, self._typesdict[tp.totype])
|
||
|
|
|
||
|
|
_emit_bytecode_ConstPointerType = _emit_bytecode_PointerType
|
||
|
|
_emit_bytecode_NamedPointerType = _emit_bytecode_PointerType
|
||
|
|
|
||
|
|
def _emit_bytecode_FunctionPtrType(self, tp, index):
|
||
|
|
raw = tp.as_raw_function()
|
||
|
|
self.cffi_types[index] = CffiOp(OP_POINTER, self._typesdict[raw])
|
||
|
|
|
||
|
|
def _emit_bytecode_ArrayType(self, tp, index):
|
||
|
|
item_index = self._typesdict[tp.item]
|
||
|
|
if tp.length is None:
|
||
|
|
self.cffi_types[index] = CffiOp(OP_OPEN_ARRAY, item_index)
|
||
|
|
elif tp.length == '...':
|
||
|
|
raise ffiplatform.VerificationError(
|
||
|
|
"type %s badly placed: the '...' array length can only be "
|
||
|
|
"used on global arrays or on fields of structures" % (
|
||
|
|
str(tp).replace('/*...*/', '...'),))
|
||
|
|
else:
|
||
|
|
assert self.cffi_types[index + 1] == 'LEN'
|
||
|
|
self.cffi_types[index] = CffiOp(OP_ARRAY, item_index)
|
||
|
|
self.cffi_types[index + 1] = CffiOp(None, str(tp.length))
|
||
|
|
|
||
|
|
def _emit_bytecode_StructType(self, tp, index):
|
||
|
|
struct_index = self._struct_unions[tp]
|
||
|
|
self.cffi_types[index] = CffiOp(OP_STRUCT_UNION, struct_index)
|
||
|
|
_emit_bytecode_UnionType = _emit_bytecode_StructType
|
||
|
|
|
||
|
|
def _emit_bytecode_EnumType(self, tp, index):
|
||
|
|
enum_index = self._enums[tp]
|
||
|
|
self.cffi_types[index] = CffiOp(OP_ENUM, enum_index)
|
||
|
|
|
||
|
|
|
||
|
|
if sys.version_info >= (3,):
|
||
|
|
NativeIO = io.StringIO
|
||
|
|
else:
|
||
|
|
class NativeIO(io.BytesIO):
|
||
|
|
def write(self, s):
|
||
|
|
if isinstance(s, unicode):
|
||
|
|
s = s.encode('ascii')
|
||
|
|
super(NativeIO, self).write(s)
|
||
|
|
|
||
|
|
def _make_c_or_py_source(ffi, module_name, preamble, target_file):
|
||
|
|
recompiler = Recompiler(ffi, module_name,
|
||
|
|
target_is_python=(preamble is None))
|
||
|
|
recompiler.collect_type_table()
|
||
|
|
recompiler.collect_step_tables()
|
||
|
|
f = NativeIO()
|
||
|
|
recompiler.write_source_to_f(f, preamble)
|
||
|
|
output = f.getvalue()
|
||
|
|
try:
|
||
|
|
with open(target_file, 'r') as f1:
|
||
|
|
if f1.read(len(output) + 1) != output:
|
||
|
|
raise IOError
|
||
|
|
return False # already up-to-date
|
||
|
|
except IOError:
|
||
|
|
tmp_file = '%s.~%d' % (target_file, os.getpid())
|
||
|
|
with open(tmp_file, 'w') as f1:
|
||
|
|
f1.write(output)
|
||
|
|
try:
|
||
|
|
os.rename(tmp_file, target_file)
|
||
|
|
except OSError:
|
||
|
|
os.unlink(target_file)
|
||
|
|
os.rename(tmp_file, target_file)
|
||
|
|
return True
|
||
|
|
|
||
|
|
def make_c_source(ffi, module_name, preamble, target_c_file):
|
||
|
|
assert preamble is not None
|
||
|
|
return _make_c_or_py_source(ffi, module_name, preamble, target_c_file)
|
||
|
|
|
||
|
|
def make_py_source(ffi, module_name, target_py_file):
|
||
|
|
return _make_c_or_py_source(ffi, module_name, None, target_py_file)
|
||
|
|
|
||
|
|
def _modname_to_file(outputdir, modname, extension):
|
||
|
|
parts = modname.split('.')
|
||
|
|
try:
|
||
|
|
os.makedirs(os.path.join(outputdir, *parts[:-1]))
|
||
|
|
except OSError:
|
||
|
|
pass
|
||
|
|
parts[-1] += extension
|
||
|
|
return os.path.join(outputdir, *parts), parts
|
||
|
|
|
||
|
|
def recompile(ffi, module_name, preamble, tmpdir='.', call_c_compiler=True,
|
||
|
|
c_file=None, source_extension='.c', extradir=None, **kwds):
|
||
|
|
if not isinstance(module_name, str):
|
||
|
|
module_name = module_name.encode('ascii')
|
||
|
|
if ffi._windows_unicode:
|
||
|
|
ffi._apply_windows_unicode(kwds)
|
||
|
|
if preamble is not None:
|
||
|
|
if c_file is None:
|
||
|
|
c_file, parts = _modname_to_file(tmpdir, module_name,
|
||
|
|
source_extension)
|
||
|
|
if extradir:
|
||
|
|
parts = [extradir] + parts
|
||
|
|
ext_c_file = os.path.join(*parts)
|
||
|
|
else:
|
||
|
|
ext_c_file = c_file
|
||
|
|
ext = ffiplatform.get_extension(ext_c_file, module_name, **kwds)
|
||
|
|
updated = make_c_source(ffi, module_name, preamble, c_file)
|
||
|
|
if call_c_compiler:
|
||
|
|
cwd = os.getcwd()
|
||
|
|
try:
|
||
|
|
os.chdir(tmpdir)
|
||
|
|
outputfilename = ffiplatform.compile('.', ext)
|
||
|
|
finally:
|
||
|
|
os.chdir(cwd)
|
||
|
|
return outputfilename
|
||
|
|
else:
|
||
|
|
return ext, updated
|
||
|
|
else:
|
||
|
|
if c_file is None:
|
||
|
|
c_file, _ = _modname_to_file(tmpdir, module_name, '.py')
|
||
|
|
updated = make_py_source(ffi, module_name, c_file)
|
||
|
|
if call_c_compiler:
|
||
|
|
return c_file
|
||
|
|
else:
|
||
|
|
return None, updated
|
||
|
|
|
||
|
|
def _verify(ffi, module_name, preamble, *args, **kwds):
|
||
|
|
# FOR TESTS ONLY
|
||
|
|
from testing.udir import udir
|
||
|
|
import imp
|
||
|
|
assert module_name not in sys.modules, "module name conflict: %r" % (
|
||
|
|
module_name,)
|
||
|
|
kwds.setdefault('tmpdir', str(udir))
|
||
|
|
outputfilename = recompile(ffi, module_name, preamble, *args, **kwds)
|
||
|
|
module = imp.load_dynamic(module_name, outputfilename)
|
||
|
|
#
|
||
|
|
# hack hack hack: copy all *bound methods* from module.ffi back to the
|
||
|
|
# ffi instance. Then calls like ffi.new() will invoke module.ffi.new().
|
||
|
|
for name in dir(module.ffi):
|
||
|
|
if not name.startswith('_'):
|
||
|
|
attr = getattr(module.ffi, name)
|
||
|
|
if attr is not getattr(ffi, name, object()):
|
||
|
|
setattr(ffi, name, attr)
|
||
|
|
def typeof_disabled(*args, **kwds):
|
||
|
|
raise NotImplementedError
|
||
|
|
ffi._typeof = typeof_disabled
|
||
|
|
return module.lib
|