diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/cffi/recompiler.py')
| -rw-r--r-- | .venv/lib/python3.12/site-packages/cffi/recompiler.py | 1598 |
1 files changed, 1598 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/cffi/recompiler.py b/.venv/lib/python3.12/site-packages/cffi/recompiler.py new file mode 100644 index 00000000..57781a3c --- /dev/null +++ b/.venv/lib/python3.12/site-packages/cffi/recompiler.py @@ -0,0 +1,1598 @@ +import os, sys, io +from . import ffiplatform, model +from .error import VerificationError +from .cffi_opcode import * + +VERSION_BASE = 0x2601 +VERSION_EMBEDDED = 0x2701 +VERSION_CHAR16CHAR32 = 0x2801 + +USE_LIMITED_API = (sys.platform != 'win32' or sys.version_info < (3, 0) or + sys.version_info >= (3, 5)) + + +class GlobalExpr: + def __init__(self, name, address, type_op, size=0, check_value=0): + self.name = name + self.address = address + self.type_op = type_op + self.size = size + self.check_value = check_value + + def as_c_expr(self): + return ' { "%s", (void *)%s, %s, (void *)%s },' % ( + self.name, self.address, self.type_op.as_c_expr(), self.size) + + def as_python_expr(self): + return "b'%s%s',%d" % (self.type_op.as_python_bytes(), self.name, + self.check_value) + +class FieldExpr: + def __init__(self, name, field_offset, field_size, fbitsize, field_type_op): + self.name = name + self.field_offset = field_offset + self.field_size = field_size + self.fbitsize = fbitsize + self.field_type_op = field_type_op + + def as_c_expr(self): + spaces = " " * len(self.name) + return (' { "%s", %s,\n' % (self.name, self.field_offset) + + ' %s %s,\n' % (spaces, self.field_size) + + ' %s %s },' % (spaces, self.field_type_op.as_c_expr())) + + def as_python_expr(self): + raise NotImplementedError + + def as_field_python_expr(self): + if self.field_type_op.op == OP_NOOP: + size_expr = '' + elif self.field_type_op.op == OP_BITFIELD: + size_expr = format_four_bytes(self.fbitsize) + else: + raise NotImplementedError + return "b'%s%s%s'" % (self.field_type_op.as_python_bytes(), + size_expr, + self.name) + +class StructUnionExpr: + def __init__(self, name, type_index, flags, size, alignment, comment, + first_field_index, c_fields): + self.name = name + self.type_index = type_index + self.flags = flags + self.size = size + self.alignment = alignment + self.comment = comment + self.first_field_index = first_field_index + self.c_fields = c_fields + + def as_c_expr(self): + return (' { "%s", %d, %s,' % (self.name, self.type_index, self.flags) + + '\n %s, %s, ' % (self.size, self.alignment) + + '%d, %d ' % (self.first_field_index, len(self.c_fields)) + + ('/* %s */ ' % self.comment if self.comment else '') + + '},') + + def as_python_expr(self): + flags = eval(self.flags, G_FLAGS) + fields_expr = [c_field.as_field_python_expr() + for c_field in self.c_fields] + return "(b'%s%s%s',%s)" % ( + format_four_bytes(self.type_index), + format_four_bytes(flags), + self.name, + ','.join(fields_expr)) + +class EnumExpr: + def __init__(self, name, type_index, size, signed, allenums): + self.name = name + self.type_index = type_index + self.size = size + self.signed = signed + self.allenums = allenums + + def as_c_expr(self): + return (' { "%s", %d, _cffi_prim_int(%s, %s),\n' + ' "%s" },' % (self.name, self.type_index, + self.size, self.signed, self.allenums)) + + def as_python_expr(self): + prim_index = { + (1, 0): PRIM_UINT8, (1, 1): PRIM_INT8, + (2, 0): PRIM_UINT16, (2, 1): PRIM_INT16, + (4, 0): PRIM_UINT32, (4, 1): PRIM_INT32, + (8, 0): PRIM_UINT64, (8, 1): PRIM_INT64, + }[self.size, self.signed] + return "b'%s%s%s\\x00%s'" % (format_four_bytes(self.type_index), + format_four_bytes(prim_index), + self.name, self.allenums) + +class TypenameExpr: + def __init__(self, name, type_index): + self.name = name + self.type_index = type_index + + def as_c_expr(self): + return ' { "%s", %d },' % (self.name, self.type_index) + + def as_python_expr(self): + return "b'%s%s'" % (format_four_bytes(self.type_index), self.name) + + +# ____________________________________________________________ + + +class Recompiler: + _num_externpy = 0 + + def __init__(self, ffi, module_name, target_is_python=False): + self.ffi = ffi + self.module_name = module_name + self.target_is_python = target_is_python + self._version = VERSION_BASE + + def needs_version(self, ver): + self._version = max(self._version, ver) + + def collect_type_table(self): + self._typesdict = {} + self._generate("collecttype") + # + all_decls = sorted(self._typesdict, key=str) + # + # prepare all FUNCTION bytecode sequences first + self.cffi_types = [] + for tp in all_decls: + if tp.is_raw_function: + assert self._typesdict[tp] is None + self._typesdict[tp] = len(self.cffi_types) + self.cffi_types.append(tp) # placeholder + for tp1 in tp.args: + assert isinstance(tp1, (model.VoidType, + model.BasePrimitiveType, + model.PointerType, + model.StructOrUnionOrEnum, + model.FunctionPtrType)) + if self._typesdict[tp1] is None: + self._typesdict[tp1] = len(self.cffi_types) + self.cffi_types.append(tp1) # placeholder + self.cffi_types.append('END') # placeholder + # + # prepare all OTHER bytecode sequences + for tp in all_decls: + if not tp.is_raw_function and self._typesdict[tp] is None: + self._typesdict[tp] = len(self.cffi_types) + self.cffi_types.append(tp) # placeholder + if tp.is_array_type and tp.length is not None: + self.cffi_types.append('LEN') # placeholder + assert None not in self._typesdict.values() + # + # collect all structs and unions and enums + self._struct_unions = {} + self._enums = {} + for tp in all_decls: + if isinstance(tp, model.StructOrUnion): + self._struct_unions[tp] = None + elif isinstance(tp, model.EnumType): + self._enums[tp] = None + for i, tp in enumerate(sorted(self._struct_unions, + key=lambda tp: tp.name)): + self._struct_unions[tp] = i + for i, tp in enumerate(sorted(self._enums, + key=lambda tp: tp.name)): + self._enums[tp] = i + # + # emit all bytecode sequences now + for tp in all_decls: + method = getattr(self, '_emit_bytecode_' + tp.__class__.__name__) + method(tp, self._typesdict[tp]) + # + # consistency check + for op in self.cffi_types: + assert isinstance(op, CffiOp) + self.cffi_types = tuple(self.cffi_types) # don't change any more + + def _enum_fields(self, tp): + # When producing C, expand all anonymous struct/union fields. + # That's necessary to have C code checking the offsets of the + # individual fields contained in them. When producing Python, + # don't do it and instead write it like it is, with the + # corresponding fields having an empty name. Empty names are + # recognized at runtime when we import the generated Python + # file. + expand_anonymous_struct_union = not self.target_is_python + return tp.enumfields(expand_anonymous_struct_union) + + def _do_collect_type(self, tp): + if not isinstance(tp, model.BaseTypeByIdentity): + if isinstance(tp, tuple): + for x in tp: + self._do_collect_type(x) + return + if tp not in self._typesdict: + self._typesdict[tp] = None + if isinstance(tp, model.FunctionPtrType): + self._do_collect_type(tp.as_raw_function()) + elif isinstance(tp, model.StructOrUnion): + if tp.fldtypes is not None and ( + tp not in self.ffi._parser._included_declarations): + for name1, tp1, _, _ in self._enum_fields(tp): + self._do_collect_type(self._field_type(tp, name1, tp1)) + else: + for _, x in tp._get_items(): + self._do_collect_type(x) + + def _generate(self, step_name): + lst = self.ffi._parser._declarations.items() + for name, (tp, quals) in sorted(lst): + kind, realname = name.split(' ', 1) + try: + method = getattr(self, '_generate_cpy_%s_%s' % (kind, + step_name)) + except AttributeError: + raise VerificationError( + "not implemented in recompile(): %r" % name) + try: + self._current_quals = quals + method(tp, realname) + except Exception as e: + model.attach_exception_info(e, name) + raise + + # ---------- + + ALL_STEPS = ["global", "field", "struct_union", "enum", "typename"] + + def collect_step_tables(self): + # collect the declarations for '_cffi_globals', '_cffi_typenames', etc. + self._lsts = {} + for step_name in self.ALL_STEPS: + self._lsts[step_name] = [] + self._seen_struct_unions = set() + self._generate("ctx") + self._add_missing_struct_unions() + # + for step_name in self.ALL_STEPS: + lst = self._lsts[step_name] + if step_name != "field": + lst.sort(key=lambda entry: entry.name) + self._lsts[step_name] = tuple(lst) # don't change any more + # + # check for a possible internal inconsistency: _cffi_struct_unions + # should have been generated with exactly self._struct_unions + lst = self._lsts["struct_union"] + for tp, i in self._struct_unions.items(): + assert i < len(lst) + assert lst[i].name == tp.name + assert len(lst) == len(self._struct_unions) + # same with enums + lst = self._lsts["enum"] + for tp, i in self._enums.items(): + assert i < len(lst) + assert lst[i].name == tp.name + assert len(lst) == len(self._enums) + + # ---------- + + def _prnt(self, what=''): + self._f.write(what + '\n') + + def write_source_to_f(self, f, preamble): + if self.target_is_python: + assert preamble is None + self.write_py_source_to_f(f) + else: + assert preamble is not None + self.write_c_source_to_f(f, preamble) + + def _rel_readlines(self, filename): + g = open(os.path.join(os.path.dirname(__file__), filename), 'r') + lines = g.readlines() + g.close() + return lines + + def write_c_source_to_f(self, f, preamble): + self._f = f + prnt = self._prnt + if self.ffi._embedding is not None: + prnt('#define _CFFI_USE_EMBEDDING') + if not USE_LIMITED_API: + prnt('#define _CFFI_NO_LIMITED_API') + # + # first the '#include' (actually done by inlining the file's content) + lines = self._rel_readlines('_cffi_include.h') + i = lines.index('#include "parse_c_type.h"\n') + lines[i:i+1] = self._rel_readlines('parse_c_type.h') + prnt(''.join(lines)) + # + # if we have ffi._embedding != None, we give it here as a macro + # and include an extra file + base_module_name = self.module_name.split('.')[-1] + if self.ffi._embedding is not None: + prnt('#define _CFFI_MODULE_NAME "%s"' % (self.module_name,)) + prnt('static const char _CFFI_PYTHON_STARTUP_CODE[] = {') + self._print_string_literal_in_array(self.ffi._embedding) + prnt('0 };') + prnt('#ifdef PYPY_VERSION') + prnt('# define _CFFI_PYTHON_STARTUP_FUNC _cffi_pypyinit_%s' % ( + base_module_name,)) + prnt('#elif PY_MAJOR_VERSION >= 3') + prnt('# define _CFFI_PYTHON_STARTUP_FUNC PyInit_%s' % ( + base_module_name,)) + prnt('#else') + prnt('# define _CFFI_PYTHON_STARTUP_FUNC init%s' % ( + base_module_name,)) + prnt('#endif') + lines = self._rel_readlines('_embedding.h') + i = lines.index('#include "_cffi_errors.h"\n') + lines[i:i+1] = self._rel_readlines('_cffi_errors.h') + prnt(''.join(lines)) + self.needs_version(VERSION_EMBEDDED) + # + # then paste the C source given by the user, verbatim. + prnt('/************************************************************/') + prnt() + prnt(preamble) + prnt() + prnt('/************************************************************/') + prnt() + # + # the declaration of '_cffi_types' + prnt('static void *_cffi_types[] = {') + typeindex2type = dict([(i, tp) for (tp, i) in self._typesdict.items()]) + for i, op in enumerate(self.cffi_types): + comment = '' + if i in typeindex2type: + comment = ' // ' + typeindex2type[i]._get_c_name() + prnt('/* %2d */ %s,%s' % (i, op.as_c_expr(), comment)) + if not self.cffi_types: + prnt(' 0') + prnt('};') + prnt() + # + # call generate_cpy_xxx_decl(), for every xxx found from + # ffi._parser._declarations. This generates all the functions. + self._seen_constants = set() + self._generate("decl") + # + # the declaration of '_cffi_globals' and '_cffi_typenames' + nums = {} + for step_name in self.ALL_STEPS: + lst = self._lsts[step_name] + nums[step_name] = len(lst) + if nums[step_name] > 0: + prnt('static const struct _cffi_%s_s _cffi_%ss[] = {' % ( + step_name, step_name)) + for entry in lst: + prnt(entry.as_c_expr()) + prnt('};') + prnt() + # + # the declaration of '_cffi_includes' + if self.ffi._included_ffis: + prnt('static const char * const _cffi_includes[] = {') + for ffi_to_include in self.ffi._included_ffis: + try: + included_module_name, included_source = ( + ffi_to_include._assigned_source[:2]) + except AttributeError: + raise 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 None: + raise VerificationError( + "not implemented yet: ffi.include() of a Python-based " + "ffi inside a C-based ffi") + prnt(' "%s",' % (included_module_name,)) + prnt(' NULL') + prnt('};') + prnt() + # + # the declaration of '_cffi_type_context' + prnt('static const struct _cffi_type_context_s _cffi_type_context = {') + prnt(' _cffi_types,') + 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),)) + flags = 0 + if self._num_externpy > 0 or self.ffi._embedding is not None: + flags |= 1 # set to mean that we use extern "Python" + prnt(' %d, /* flags */' % flags) + prnt('};') + prnt() + # + # the init function + prnt('#ifdef __GNUC__') + prnt('# pragma GCC visibility push(default) /* for -fvisibility= */') + prnt('#endif') + prnt() + prnt('#ifdef PYPY_VERSION') + prnt('PyMODINIT_FUNC') + prnt('_cffi_pypyinit_%s(const void *p[])' % (base_module_name,)) + prnt('{') + if flags & 1: + prnt(' if (((intptr_t)p[0]) >= 0x0A03) {') + prnt(' _cffi_call_python_org = ' + '(void(*)(struct _cffi_externpy_s *, char *))p[1];') + prnt(' }') + prnt(' p[0] = (const void *)0x%x;' % self._version) + prnt(' p[1] = &_cffi_type_context;') + prnt('#if PY_MAJOR_VERSION >= 3') + prnt(' return NULL;') + prnt('#endif') + 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", 0x%x, &_cffi_type_context);' % ( + self.module_name, self._version)) + prnt('}') + prnt('#else') + prnt('PyMODINIT_FUNC') + prnt('init%s(void)' % (base_module_name,)) + prnt('{') + prnt(' _cffi_init("%s", 0x%x, &_cffi_type_context);' % ( + self.module_name, self._version)) + prnt('}') + prnt('#endif') + prnt() + prnt('#ifdef __GNUC__') + prnt('# pragma GCC visibility pop') + prnt('#endif') + self._version = None + + 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 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 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 = 0x%x," % (self._version,)) + self._version = None + # + # 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) and not tp.is_complex_type(): + 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: + cname = tp.get_c_name('') + converter = '(%s)_cffi_to_c_%s' % (cname, + tp.name.replace(' ', '_')) + if cname in ('char16_t', 'char32_t'): + self.needs_version(VERSION_CHAR16CHAR32) + errvalue = '-1' + # + elif isinstance(tp, model.PointerType): + self._convert_funcarg_to_c_ptr_or_array(tp, fromvar, + tovar, errcode) + return + # + elif (isinstance(tp, model.StructOrUnionOrEnum) or + isinstance(tp, model.BasePrimitiveType)): + # a struct (not a struct pointer) as a function argument; + # or, a complex (the same code works) + 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, freelines): + if isinstance(tp, model.PointerType): + localvars.add('Py_ssize_t datasize') + localvars.add('struct _cffi_freeme_s *large_args_free = NULL') + freelines.add('if (large_args_free != NULL)' + ' _cffi_free_array_arguments(large_args_free);') + + 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(' %s = ((size_t)datasize) <= 640 ? ' + '(%s)alloca((size_t)datasize) : NULL;' % ( + tovar, tp.get_c_name(''))) + self._prnt(' if (_cffi_convert_array_argument(_cffi_type(%d), %s, ' + '(char **)&%s,' % (self._gettypenum(tp), fromvar, tovar)) + self._prnt(' datasize, &large_args_free) < 0)') + 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() and tp.name != '_Bool': + 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' and not tp.is_complex_type(): + cname = tp.name.replace(' ', '_') + if cname in ('char16_t', 'char32_t'): + self.needs_version(VERSION_CHAR16CHAR32) + return '_cffi_from_c_%s(%s)' % (cname, 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.StructOrUnion): + 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 _typedef_type(self, tp, name): + return self._global_type(tp, "(*(%s *)0)" % (name,)) + + def _generate_cpy_typedef_collecttype(self, tp, name): + self._do_collect_type(self._typedef_type(tp, name)) + + 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): + tp = self._typedef_type(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() + freelines = set() + for type in tp.args: + self._extra_local_variables(type, localvars, freelines) + for decl in sorted(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) + prnt(' PyObject *pyresult;') + 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() + prnt(' if (!PyArg_UnpackTuple(args, "%s", %d, %d, %s))' % ( + name, len(rng), len(rng), + ', '.join(['&arg%d' % i for i in rng]))) + prnt(' return NULL;') + 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(' pyresult = %s;' % + self._convert_expr_from_c(tp.result, 'result', 'result type')) + for freeline in freelines: + prnt(' ' + freeline) + prnt(' return pyresult;') + else: + for freeline in freelines: + prnt(' ' + freeline) + 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. We also do that for + # complex args and return type. + def need_indirection(type): + return (isinstance(type, model.StructOrUnion) or + (isinstance(type, model.PrimitiveType) and + type.is_complex_type())) + difference = False + arguments = [] + call_arguments = [] + context = 'argument of %s' % name + for i, type in enumerate(tp.args): + indirection = '' + if need_indirection(type): + 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 need_indirection(tp_result): + 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) + if self.target_is_python: + # also requires nested anon struct/unions in ABI mode, recursively + for fldtype in tp.anonymous_struct_fields(): + self._struct_collecttype(fldtype) + + 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 self._enum_fields(tp): + try: + if ftype.is_integer_type() or fbitsize >= 0: + # accept all integers, but complain on float or double + if fname != '': + prnt(" (void)((p->%s) | 0); /* 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 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 any(tp.anonymous_struct_fields()): + pass # field layout obtained silently from the C compiler + else: + flags.append("_CFFI_F_CHECK_FIELDS") + if tp.packed: + if tp.packed > 1: + raise NotImplementedError( + "%r is declared with 'pack=%r'; only 0 or 1 are " + "supported in API mode (try to use \"...;\", which " + "does not require a 'pack' declaration)" % + (tp, 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(self._enum_fields(tp)) + for fldname, fldtype, fbitsize, fqual in enumfields: + fldtype = self._field_type(tp, fldname, fldtype) + self._check_not_opaque(fldtype, + "field '%s.%s'" % (tp.name, fldname)) + # 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)4096)->%s) - (char *)4096' % ( + 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 _check_not_opaque(self, tp, location): + while isinstance(tp, model.ArrayType): + tp = tp.item + if isinstance(tp, model.StructOrUnion) and tp.fldtypes is None: + raise TypeError( + "%s is of an opaque type (not declared in cdef())" % location) + + 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 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 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))) + + # ---------- + # extern "Python" + + def _generate_cpy_extern_python_collecttype(self, tp, name): + assert isinstance(tp, model.FunctionPtrType) + self._do_collect_type(tp) + _generate_cpy_dllexport_python_collecttype = \ + _generate_cpy_extern_python_plus_c_collecttype = \ + _generate_cpy_extern_python_collecttype + + def _extern_python_decl(self, tp, name, tag_and_space): + prnt = self._prnt + if isinstance(tp.result, model.VoidType): + size_of_result = '0' + else: + context = 'result of %s' % name + size_of_result = '(int)sizeof(%s)' % ( + tp.result.get_c_name('', context),) + prnt('static struct _cffi_externpy_s _cffi_externpy__%s =' % name) + prnt(' { "%s.%s", %s, 0, 0 };' % ( + self.module_name, name, size_of_result)) + prnt() + # + arguments = [] + context = 'argument of %s' % name + for i, type in enumerate(tp.args): + arg = type.get_c_name(' a%d' % i, context) + arguments.append(arg) + # + repr_arguments = ', '.join(arguments) + repr_arguments = repr_arguments or 'void' + name_and_arguments = '%s(%s)' % (name, repr_arguments) + if tp.abi == "__stdcall": + name_and_arguments = '_cffi_stdcall ' + name_and_arguments + # + def may_need_128_bits(tp): + return (isinstance(tp, model.PrimitiveType) and + tp.name == 'long double') + # + size_of_a = max(len(tp.args)*8, 8) + if may_need_128_bits(tp.result): + size_of_a = max(size_of_a, 16) + if isinstance(tp.result, model.StructOrUnion): + size_of_a = 'sizeof(%s) > %d ? sizeof(%s) : %d' % ( + tp.result.get_c_name(''), size_of_a, + tp.result.get_c_name(''), size_of_a) + prnt('%s%s' % (tag_and_space, tp.result.get_c_name(name_and_arguments))) + prnt('{') + prnt(' char a[%s];' % size_of_a) + prnt(' char *p = a;') + for i, type in enumerate(tp.args): + arg = 'a%d' % i + if (isinstance(type, model.StructOrUnion) or + may_need_128_bits(type)): + arg = '&' + arg + type = model.PointerType(type) + prnt(' *(%s)(p + %d) = %s;' % (type.get_c_name('*'), i*8, arg)) + prnt(' _cffi_call_python(&_cffi_externpy__%s, p);' % name) + if not isinstance(tp.result, model.VoidType): + prnt(' return *(%s)p;' % (tp.result.get_c_name('*'),)) + prnt('}') + prnt() + self._num_externpy += 1 + + def _generate_cpy_extern_python_decl(self, tp, name): + self._extern_python_decl(tp, name, 'static ') + + def _generate_cpy_dllexport_python_decl(self, tp, name): + self._extern_python_decl(tp, name, 'CFFI_DLLEXPORT ') + + def _generate_cpy_extern_python_plus_c_decl(self, tp, name): + self._extern_python_decl(tp, name, '') + + def _generate_cpy_extern_python_ctx(self, tp, name): + if self.target_is_python: + raise VerificationError( + "cannot use 'extern \"Python\"' in the ABI mode") + if tp.ellipsis: + raise NotImplementedError("a vararg function is extern \"Python\"") + type_index = self._typesdict[tp] + type_op = CffiOp(OP_EXTERN_PYTHON, type_index) + self._lsts["global"].append( + GlobalExpr(name, '&_cffi_externpy__%s' % name, type_op, name)) + + _generate_cpy_dllexport_python_ctx = \ + _generate_cpy_extern_python_plus_c_ctx = \ + _generate_cpy_extern_python_ctx + + def _print_string_literal_in_array(self, s): + prnt = self._prnt + prnt('// # NB. this is not a string because of a size limit in MSVC') + if not isinstance(s, bytes): # unicode + s = s.encode('utf-8') # -> bytes + else: + s.decode('utf-8') # got bytes, check for valid utf-8 + try: + s.decode('ascii') + except UnicodeDecodeError: + s = b'# -*- encoding: utf8 -*-\n' + s + for line in s.splitlines(True): + comment = line + if type('//') is bytes: # python2 + line = map(ord, line) # make a list of integers + else: # python3 + # type(line) is bytes, which enumerates like a list of integers + comment = ascii(comment)[1:-1] + prnt(('// ' + comment).rstrip()) + printed_line = '' + for c in line: + if len(printed_line) >= 76: + prnt(printed_line) + printed_line = '' + printed_line += '%d,' % (c,) + prnt(printed_line) + + # ---------- + # 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 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 _is_file_like(maybefile): + # compare to xml.etree.ElementTree._get_writer + return hasattr(maybefile, 'write') + +def _make_c_or_py_source(ffi, module_name, preamble, target_file, verbose): + if verbose: + print("generating %s" % (target_file,)) + recompiler = Recompiler(ffi, module_name, + target_is_python=(preamble is None)) + recompiler.collect_type_table() + recompiler.collect_step_tables() + if _is_file_like(target_file): + recompiler.write_source_to_f(target_file, preamble) + return True + 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 + if verbose: + print("(already up-to-date)") + 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, verbose=False): + assert preamble is not None + return _make_c_or_py_source(ffi, module_name, preamble, target_c_file, + verbose) + +def make_py_source(ffi, module_name, target_py_file, verbose=False): + return _make_c_or_py_source(ffi, module_name, None, target_py_file, + verbose) + +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 + + +# Aaargh. Distutils is not tested at all for the purpose of compiling +# DLLs that are not extension modules. Here are some hacks to work +# around that, in the _patch_for_*() functions... + +def _patch_meth(patchlist, cls, name, new_meth): + old = getattr(cls, name) + patchlist.append((cls, name, old)) + setattr(cls, name, new_meth) + return old + +def _unpatch_meths(patchlist): + for cls, name, old_meth in reversed(patchlist): + setattr(cls, name, old_meth) + +def _patch_for_embedding(patchlist): + if sys.platform == 'win32': + # we must not remove the manifest when building for embedding! + # FUTURE: this module was removed in setuptools 74; this is likely dead code and should be removed, + # since the toolchain it supports (VS2005-2008) is also long dead. + from cffi._shimmed_dist_utils import MSVCCompiler + if MSVCCompiler is not None: + _patch_meth(patchlist, MSVCCompiler, '_remove_visual_c_ref', + lambda self, manifest_file: manifest_file) + + if sys.platform == 'darwin': + # we must not make a '-bundle', but a '-dynamiclib' instead + from cffi._shimmed_dist_utils import CCompiler + def my_link_shared_object(self, *args, **kwds): + if '-bundle' in self.linker_so: + self.linker_so = list(self.linker_so) + i = self.linker_so.index('-bundle') + self.linker_so[i] = '-dynamiclib' + return old_link_shared_object(self, *args, **kwds) + old_link_shared_object = _patch_meth(patchlist, CCompiler, + 'link_shared_object', + my_link_shared_object) + +def _patch_for_target(patchlist, target): + from cffi._shimmed_dist_utils import build_ext + # if 'target' is different from '*', we need to patch some internal + # method to just return this 'target' value, instead of having it + # built from module_name + if target.endswith('.*'): + target = target[:-2] + if sys.platform == 'win32': + target += '.dll' + elif sys.platform == 'darwin': + target += '.dylib' + else: + target += '.so' + _patch_meth(patchlist, build_ext, 'get_ext_filename', + lambda self, ext_name: target) + + +def recompile(ffi, module_name, preamble, tmpdir='.', call_c_compiler=True, + c_file=None, source_extension='.c', extradir=None, + compiler_verbose=1, target=None, debug=None, + uses_ffiplatform=True, **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 call_c_compiler and _is_file_like(c_file): + raise TypeError("Writing to file-like objects is not supported " + "with call_c_compiler=True") + embedding = (ffi._embedding is not None) + if embedding: + ffi._apply_embedding_fix(kwds) + 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 + # + if target is None: + if embedding: + target = '%s.*' % module_name + else: + target = '*' + # + if uses_ffiplatform: + ext = ffiplatform.get_extension(ext_c_file, module_name, **kwds) + else: + ext = None + updated = make_c_source(ffi, module_name, preamble, c_file, + verbose=compiler_verbose) + if call_c_compiler: + patchlist = [] + cwd = os.getcwd() + try: + if embedding: + _patch_for_embedding(patchlist) + if target != '*': + _patch_for_target(patchlist, target) + if compiler_verbose: + if tmpdir == '.': + msg = 'the current directory is' + else: + msg = 'setting the current directory to' + print('%s %r' % (msg, os.path.abspath(tmpdir))) + os.chdir(tmpdir) + outputfilename = ffiplatform.compile('.', ext, + compiler_verbose, debug) + finally: + os.chdir(cwd) + _unpatch_meths(patchlist) + 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, + verbose=compiler_verbose) + if call_c_compiler: + return c_file + else: + return None, updated + |