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Viewing File: cffi_opcode.py
from .error import VerificationError
class CffiOp(object):
def __init__(self, op, arg):
self.op = op
self.arg = arg
def as_c_expr(self):
if self.op is None:
assert isinstance(self.arg, str)
return '(_cffi_opcode_t)(%s)' % (self.arg,)
classname = CLASS_NAME[self.op]
return '_CFFI_OP(_CFFI_OP_%s, %s)' % (classname, self.arg)
def as_python_bytes(self):
if self.op is None and self.arg.isdigit():
value = int(self.arg) # non-negative: '-' not in self.arg
if value >= 2**31:
raise OverflowError("cannot emit %r: limited to 2**31-1"
% (self.arg,))
return format_four_bytes(value)
if isinstance(self.arg, str):
raise VerificationError("cannot emit to Python: %r" % (self.arg,))
return format_four_bytes((self.arg << 8) | self.op)
def __str__(self):
classname = CLASS_NAME.get(self.op, self.op)
return '(%s %s)' % (classname, self.arg)
def format_four_bytes(num):
return '\\x%02X\\x%02X\\x%02X\\x%02X' % (
(num >> 24) & 0xFF,
(num >> 16) & 0xFF,
(num >> 8) & 0xFF,
(num ) & 0xFF)
OP_PRIMITIVE = 1
OP_POINTER = 3
OP_ARRAY = 5
OP_OPEN_ARRAY = 7
OP_STRUCT_UNION = 9
OP_ENUM = 11
OP_FUNCTION = 13
OP_FUNCTION_END = 15
OP_NOOP = 17
OP_BITFIELD = 19
OP_TYPENAME = 21
OP_CPYTHON_BLTN_V = 23 # varargs
OP_CPYTHON_BLTN_N = 25 # noargs
OP_CPYTHON_BLTN_O = 27 # O (i.e. a single arg)
OP_CONSTANT = 29
OP_CONSTANT_INT = 31
OP_GLOBAL_VAR = 33
OP_DLOPEN_FUNC = 35
OP_DLOPEN_CONST = 37
OP_GLOBAL_VAR_F = 39
OP_EXTERN_PYTHON = 41
PRIM_VOID = 0
PRIM_BOOL = 1
PRIM_CHAR = 2
PRIM_SCHAR = 3
PRIM_UCHAR = 4
PRIM_SHORT = 5
PRIM_USHORT = 6
PRIM_INT = 7
PRIM_UINT = 8
PRIM_LONG = 9
PRIM_ULONG = 10
PRIM_LONGLONG = 11
PRIM_ULONGLONG = 12
PRIM_FLOAT = 13
PRIM_DOUBLE = 14
PRIM_LONGDOUBLE = 15
PRIM_WCHAR = 16
PRIM_INT8 = 17
PRIM_UINT8 = 18
PRIM_INT16 = 19
PRIM_UINT16 = 20
PRIM_INT32 = 21
PRIM_UINT32 = 22
PRIM_INT64 = 23
PRIM_UINT64 = 24
PRIM_INTPTR = 25
PRIM_UINTPTR = 26
PRIM_PTRDIFF = 27
PRIM_SIZE = 28
PRIM_SSIZE = 29
PRIM_INT_LEAST8 = 30
PRIM_UINT_LEAST8 = 31
PRIM_INT_LEAST16 = 32
PRIM_UINT_LEAST16 = 33
PRIM_INT_LEAST32 = 34
PRIM_UINT_LEAST32 = 35
PRIM_INT_LEAST64 = 36
PRIM_UINT_LEAST64 = 37
PRIM_INT_FAST8 = 38
PRIM_UINT_FAST8 = 39
PRIM_INT_FAST16 = 40
PRIM_UINT_FAST16 = 41
PRIM_INT_FAST32 = 42
PRIM_UINT_FAST32 = 43
PRIM_INT_FAST64 = 44
PRIM_UINT_FAST64 = 45
PRIM_INTMAX = 46
PRIM_UINTMAX = 47
PRIM_FLOATCOMPLEX = 48
PRIM_DOUBLECOMPLEX = 49
PRIM_CHAR16 = 50
PRIM_CHAR32 = 51
_NUM_PRIM = 52
_UNKNOWN_PRIM = -1
_UNKNOWN_FLOAT_PRIM = -2
_UNKNOWN_LONG_DOUBLE = -3
_IO_FILE_STRUCT = -1
PRIMITIVE_TO_INDEX = {
'char': PRIM_CHAR,
'short': PRIM_SHORT,
'int': PRIM_INT,
'long': PRIM_LONG,
'long long': PRIM_LONGLONG,
'signed char': PRIM_SCHAR,
'unsigned char': PRIM_UCHAR,
'unsigned short': PRIM_USHORT,
'unsigned int': PRIM_UINT,
'unsigned long': PRIM_ULONG,
'unsigned long long': PRIM_ULONGLONG,
'float': PRIM_FLOAT,
'double': PRIM_DOUBLE,
'long double': PRIM_LONGDOUBLE,
'float _Complex': PRIM_FLOATCOMPLEX,
'double _Complex': PRIM_DOUBLECOMPLEX,
'_Bool': PRIM_BOOL,
'wchar_t': PRIM_WCHAR,
'char16_t': PRIM_CHAR16,
'char32_t': PRIM_CHAR32,
'int8_t': PRIM_INT8,
'uint8_t': PRIM_UINT8,
'int16_t': PRIM_INT16,
'uint16_t': PRIM_UINT16,
'int32_t': PRIM_INT32,
'uint32_t': PRIM_UINT32,
'int64_t': PRIM_INT64,
'uint64_t': PRIM_UINT64,
'intptr_t': PRIM_INTPTR,
'uintptr_t': PRIM_UINTPTR,
'ptrdiff_t': PRIM_PTRDIFF,
'size_t': PRIM_SIZE,
'ssize_t': PRIM_SSIZE,
'int_least8_t': PRIM_INT_LEAST8,
'uint_least8_t': PRIM_UINT_LEAST8,
'int_least16_t': PRIM_INT_LEAST16,
'uint_least16_t': PRIM_UINT_LEAST16,
'int_least32_t': PRIM_INT_LEAST32,
'uint_least32_t': PRIM_UINT_LEAST32,
'int_least64_t': PRIM_INT_LEAST64,
'uint_least64_t': PRIM_UINT_LEAST64,
'int_fast8_t': PRIM_INT_FAST8,
'uint_fast8_t': PRIM_UINT_FAST8,
'int_fast16_t': PRIM_INT_FAST16,
'uint_fast16_t': PRIM_UINT_FAST16,
'int_fast32_t': PRIM_INT_FAST32,
'uint_fast32_t': PRIM_UINT_FAST32,
'int_fast64_t': PRIM_INT_FAST64,
'uint_fast64_t': PRIM_UINT_FAST64,
'intmax_t': PRIM_INTMAX,
'uintmax_t': PRIM_UINTMAX,
}
F_UNION = 0x01
F_CHECK_FIELDS = 0x02
F_PACKED = 0x04
F_EXTERNAL = 0x08
F_OPAQUE = 0x10
G_FLAGS = dict([('_CFFI_' + _key, globals()[_key])
for _key in ['F_UNION', 'F_CHECK_FIELDS', 'F_PACKED',
'F_EXTERNAL', 'F_OPAQUE']])
CLASS_NAME = {}
for _name, _value in list(globals().items()):
if _name.startswith('OP_') and isinstance(_value, int):
CLASS_NAME[_value] = _name[3:]
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