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1832 lines
65 KiB
1832 lines
65 KiB
import py
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import pytest
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import platform, imp
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import sys, os, ctypes
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import cffi
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from testing.udir import udir
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from testing.support import *
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from cffi.recompiler import recompile
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from cffi.cffi_opcode import PRIMITIVE_TO_INDEX
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SIZE_OF_INT = ctypes.sizeof(ctypes.c_int)
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SIZE_OF_LONG = ctypes.sizeof(ctypes.c_long)
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SIZE_OF_SHORT = ctypes.sizeof(ctypes.c_short)
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SIZE_OF_PTR = ctypes.sizeof(ctypes.c_void_p)
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SIZE_OF_WCHAR = ctypes.sizeof(ctypes.c_wchar)
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def setup_module():
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global ffi, construction_params
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ffi1 = cffi.FFI()
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DEFS = r"""
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struct repr { short a, b, c; };
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struct simple { int a; short b, c; };
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struct array { int a[2]; char b[3]; };
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struct recursive { int value; struct recursive *next; };
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union simple_u { int a; short b, c; };
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union init_u { char a; int b; };
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struct four_s { int a; short b, c, d; };
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union four_u { int a; short b, c, d; };
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struct string { const char *name; };
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struct ustring { const wchar_t *name; };
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struct voidp { void *p; int *q; short *r; };
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struct ab { int a, b; };
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struct abc { int a, b, c; };
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/* don't use A0, B0, CC0, D0 because termios.h might be included
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and it has its own #defines for these names */
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enum foq { cffiA0, cffiB0, cffiCC0, cffiD0 };
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enum bar { A1, B1=-2, CC1, D1, E1 };
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enum baz { A2=0x1000, B2=0x2000 };
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enum foo2 { A3, B3, C3, D3 };
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struct bar_with_e { enum foo2 e; };
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enum noncont { A4, B4=42, C4 };
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enum etypes {A5='!', B5='\'', C5=0x10, D5=010, E5=- 0x10, F5=-010};
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typedef enum { Value0 = 0 } e_t, *pe_t;
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enum e_noninj { AA3=0, BB3=0, CC3=0, DD3=0 };
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enum e_prev { AA4, BB4=2, CC4=4, DD4=BB4, EE4, FF4=CC4, GG4=FF4 };
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struct nesting { struct abc d, e; };
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struct array2 { int a, b; int c[99]; };
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struct align { char a; short b; char c; };
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struct bitfield { int a:10, b:20, c:3; };
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typedef enum { AA2, BB2, CC2 } foo_e_t;
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typedef struct { foo_e_t f:2; } bfenum_t;
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typedef struct { int a; } anon_foo_t;
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typedef struct { char b, c; } anon_bar_t;
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typedef struct named_foo_s { int a; } named_foo_t, *named_foo_p;
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typedef struct { int a; } unnamed_foo_t, *unnamed_foo_p;
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struct nonpacked { char a; int b; };
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struct array0 { int len; short data[0]; };
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struct array_no_length { int x; int a[]; };
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struct nested_anon {
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struct { int a, b; };
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union { int c, d; };
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};
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struct nested_field_ofs_s {
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struct { int a; char b; };
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union { char c; };
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};
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union nested_anon_u {
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struct { int a, b; };
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union { int c, d; };
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};
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struct abc50 { int a, b; int c[50]; };
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struct ints_and_bitfield { int a,b,c,d,e; int x:1; };
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"""
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DEFS_PACKED = """
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struct is_packed { char a; int b; } /*here*/;
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"""
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if sys.platform == "win32":
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DEFS = DEFS.replace('data[0]', 'data[1]') # not supported
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CCODE = (DEFS + "\n#pragma pack(push,1)\n" + DEFS_PACKED +
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"\n#pragma pack(pop)\n")
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else:
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CCODE = (DEFS +
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DEFS_PACKED.replace('/*here*/', '__attribute__((packed))'))
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ffi1.cdef(DEFS)
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ffi1.cdef(DEFS_PACKED, packed=True)
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ffi1.set_source("test_new_ffi_1", CCODE)
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outputfilename = recompile(ffi1, "test_new_ffi_1", CCODE,
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tmpdir=str(udir))
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module = imp.load_dynamic("test_new_ffi_1", outputfilename)
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ffi = module.ffi
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construction_params = (ffi1, CCODE)
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class TestNewFFI1:
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def test_integer_ranges(self):
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for (c_type, size) in [('char', 1),
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('short', 2),
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('short int', 2),
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('', 4),
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('int', 4),
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('long', SIZE_OF_LONG),
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('long int', SIZE_OF_LONG),
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('long long', 8),
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('long long int', 8),
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]:
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for unsigned in [None, False, True]:
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c_decl = {None: '',
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False: 'signed ',
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True: 'unsigned '}[unsigned] + c_type
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if c_decl == 'char' or c_decl == '':
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continue
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self._test_int_type(ffi, c_decl, size, unsigned)
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def test_fixedsize_int(self):
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for size in [1, 2, 4, 8]:
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self._test_int_type(ffi, 'int%d_t' % (8*size), size, False)
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self._test_int_type(ffi, 'uint%d_t' % (8*size), size, True)
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self._test_int_type(ffi, 'intptr_t', SIZE_OF_PTR, False)
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self._test_int_type(ffi, 'uintptr_t', SIZE_OF_PTR, True)
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self._test_int_type(ffi, 'ptrdiff_t', SIZE_OF_PTR, False)
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self._test_int_type(ffi, 'size_t', SIZE_OF_PTR, True)
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self._test_int_type(ffi, 'ssize_t', SIZE_OF_PTR, False)
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def _test_int_type(self, ffi, c_decl, size, unsigned):
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if unsigned:
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min = 0
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max = (1 << (8*size)) - 1
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else:
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min = -(1 << (8*size-1))
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max = (1 << (8*size-1)) - 1
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min = int(min)
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max = int(max)
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p = ffi.cast(c_decl, min)
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assert p == min
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assert bool(p) is bool(min)
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assert int(p) == min
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p = ffi.cast(c_decl, max)
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assert int(p) == max
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p = ffi.cast(c_decl, long(max))
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assert int(p) == max
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q = ffi.cast(c_decl, min - 1)
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assert ffi.typeof(q) is ffi.typeof(p) and int(q) == max
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q = ffi.cast(c_decl, long(min - 1))
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assert ffi.typeof(q) is ffi.typeof(p) and int(q) == max
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assert q == p
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assert int(q) == int(p)
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assert hash(q) == hash(p)
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c_decl_ptr = '%s *' % c_decl
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py.test.raises(OverflowError, ffi.new, c_decl_ptr, min - 1)
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py.test.raises(OverflowError, ffi.new, c_decl_ptr, max + 1)
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py.test.raises(OverflowError, ffi.new, c_decl_ptr, long(min - 1))
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py.test.raises(OverflowError, ffi.new, c_decl_ptr, long(max + 1))
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assert ffi.new(c_decl_ptr, min)[0] == min
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assert ffi.new(c_decl_ptr, max)[0] == max
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assert ffi.new(c_decl_ptr, long(min))[0] == min
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assert ffi.new(c_decl_ptr, long(max))[0] == max
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def test_new_unsupported_type(self):
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e = py.test.raises(TypeError, ffi.new, "int")
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assert str(e.value) == "expected a pointer or array ctype, got 'int'"
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def test_new_single_integer(self):
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p = ffi.new("int *") # similar to ffi.new("int[1]")
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assert p[0] == 0
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p[0] = -123
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assert p[0] == -123
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p = ffi.new("int *", -42)
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assert p[0] == -42
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assert repr(p) == "<cdata 'int *' owning %d bytes>" % SIZE_OF_INT
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def test_new_array_no_arg(self):
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p = ffi.new("int[10]")
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# the object was zero-initialized:
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for i in range(10):
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assert p[i] == 0
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def test_array_indexing(self):
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p = ffi.new("int[10]")
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p[0] = 42
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p[9] = 43
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assert p[0] == 42
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assert p[9] == 43
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with pytest.raises(IndexError):
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p[10]
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with pytest.raises(IndexError):
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p[10] = 44
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with pytest.raises(IndexError):
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p[-1]
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with pytest.raises(IndexError):
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p[-1] = 44
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def test_new_array_args(self):
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# this tries to be closer to C: where we say "int x[5] = {10, 20, ..}"
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# then here we must enclose the items in a list
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p = ffi.new("int[5]", [10, 20, 30, 40, 50])
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assert p[0] == 10
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assert p[1] == 20
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assert p[2] == 30
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assert p[3] == 40
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assert p[4] == 50
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p = ffi.new("int[4]", [25])
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assert p[0] == 25
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assert p[1] == 0 # follow C convention rather than LuaJIT's
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assert p[2] == 0
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assert p[3] == 0
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p = ffi.new("int[4]", [ffi.cast("int", -5)])
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assert p[0] == -5
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assert repr(p) == "<cdata 'int[4]' owning %d bytes>" % (4*SIZE_OF_INT)
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def test_new_array_varsize(self):
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p = ffi.new("int[]", 10) # a single integer is the length
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assert p[9] == 0
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with pytest.raises(IndexError):
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p[10]
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#
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py.test.raises(TypeError, ffi.new, "int[]")
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#
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p = ffi.new("int[]", [-6, -7]) # a list is all the items, like C
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assert p[0] == -6
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assert p[1] == -7
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with pytest.raises(IndexError):
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p[2]
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assert repr(p) == "<cdata 'int[]' owning %d bytes>" % (2*SIZE_OF_INT)
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#
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p = ffi.new("int[]", 0)
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with pytest.raises(IndexError):
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p[0]
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py.test.raises(ValueError, ffi.new, "int[]", -1)
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assert repr(p) == "<cdata 'int[]' owning 0 bytes>"
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def test_pointer_init(self):
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n = ffi.new("int *", 24)
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a = ffi.new("int *[10]", [ffi.NULL, ffi.NULL, n, n, ffi.NULL])
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for i in range(10):
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if i not in (2, 3):
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assert a[i] == ffi.NULL
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assert a[2] == a[3] == n
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def test_cannot_cast(self):
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a = ffi.new("short int[10]")
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e = py.test.raises(TypeError, ffi.new, "long int **", a)
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msg = str(e.value)
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assert "'short[10]'" in msg and "'long *'" in msg
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def test_new_pointer_to_array(self):
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a = ffi.new("int[4]", [100, 102, 104, 106])
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p = ffi.new("int **", a)
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assert p[0] == ffi.cast("int *", a)
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assert p[0][2] == 104
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p = ffi.cast("int *", a)
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assert p[0] == 100
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assert p[1] == 102
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assert p[2] == 104
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assert p[3] == 106
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# keepalive: a
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def test_pointer_direct(self):
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p = ffi.cast("int*", 0)
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assert p is not None
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assert bool(p) is False
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assert p == ffi.cast("int*", 0)
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assert p != None
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assert repr(p) == "<cdata 'int *' NULL>"
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a = ffi.new("int[]", [123, 456])
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p = ffi.cast("int*", a)
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assert bool(p) is True
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assert p == ffi.cast("int*", a)
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assert p != ffi.cast("int*", 0)
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assert p[0] == 123
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assert p[1] == 456
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def test_repr(self):
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typerepr = "<ctype '%s'>"
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p = ffi.cast("short unsigned int", 0)
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assert repr(p) == "<cdata 'unsigned short' 0>"
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assert repr(ffi.typeof(p)) == typerepr % "unsigned short"
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p = ffi.cast("unsigned short int", 0)
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assert repr(p) == "<cdata 'unsigned short' 0>"
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assert repr(ffi.typeof(p)) == typerepr % "unsigned short"
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p = ffi.cast("int*", 0)
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assert repr(p) == "<cdata 'int *' NULL>"
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assert repr(ffi.typeof(p)) == typerepr % "int *"
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#
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p = ffi.new("int*")
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assert repr(p) == "<cdata 'int *' owning %d bytes>" % SIZE_OF_INT
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assert repr(ffi.typeof(p)) == typerepr % "int *"
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p = ffi.new("int**")
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assert repr(p) == "<cdata 'int * *' owning %d bytes>" % SIZE_OF_PTR
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assert repr(ffi.typeof(p)) == typerepr % "int * *"
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p = ffi.new("int [2]")
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assert repr(p) == "<cdata 'int[2]' owning %d bytes>" % (2*SIZE_OF_INT)
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assert repr(ffi.typeof(p)) == typerepr % "int[2]"
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p = ffi.new("int*[2][3]")
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assert repr(p) == "<cdata 'int *[2][3]' owning %d bytes>" % (
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6*SIZE_OF_PTR)
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assert repr(ffi.typeof(p)) == typerepr % "int *[2][3]"
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p = ffi.new("struct repr *")
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assert repr(p) == "<cdata 'struct repr *' owning %d bytes>" % (
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3*SIZE_OF_SHORT)
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assert repr(ffi.typeof(p)) == typerepr % "struct repr *"
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#
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q = ffi.cast("short", -123)
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assert repr(q) == "<cdata 'short' -123>"
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assert repr(ffi.typeof(q)) == typerepr % "short"
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p = ffi.new("int*")
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q = ffi.cast("short*", p)
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assert repr(q).startswith("<cdata 'short *' 0x")
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assert repr(ffi.typeof(q)) == typerepr % "short *"
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p = ffi.new("int [2]")
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q = ffi.cast("int*", p)
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assert repr(q).startswith("<cdata 'int *' 0x")
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assert repr(ffi.typeof(q)) == typerepr % "int *"
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p = ffi.new("struct repr*")
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q = ffi.cast("struct repr *", p)
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assert repr(q).startswith("<cdata 'struct repr *' 0x")
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assert repr(ffi.typeof(q)) == typerepr % "struct repr *"
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prevrepr = repr(q)
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q = q[0]
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assert repr(q) == prevrepr.replace(' *', ' &')
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assert repr(ffi.typeof(q)) == typerepr % "struct repr"
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def test_new_array_of_array(self):
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p = ffi.new("int[3][4]")
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p[0][0] = 10
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p[2][3] = 33
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assert p[0][0] == 10
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assert p[2][3] == 33
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with pytest.raises(IndexError):
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p[1][-1]
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def test_constructor_array_of_array(self):
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p = ffi.new("int[3][2]", [[10, 11], [12, 13], [14, 15]])
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assert p[2][1] == 15
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def test_new_array_of_pointer_1(self):
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n = ffi.new("int*", 99)
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p = ffi.new("int*[4]")
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p[3] = n
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a = p[3]
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assert repr(a).startswith("<cdata 'int *' 0x")
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assert a[0] == 99
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def test_new_array_of_pointer_2(self):
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n = ffi.new("int[1]", [99])
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p = ffi.new("int*[4]")
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p[3] = n
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a = p[3]
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assert repr(a).startswith("<cdata 'int *' 0x")
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assert a[0] == 99
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def test_char(self):
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assert ffi.new("char*", b"\xff")[0] == b'\xff'
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assert ffi.new("char*")[0] == b'\x00'
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assert int(ffi.cast("char", 300)) == 300 - 256
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assert not bool(ffi.cast("char", 0))
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assert bool(ffi.cast("char", 1))
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assert bool(ffi.cast("char", 255))
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py.test.raises(TypeError, ffi.new, "char*", 32)
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py.test.raises(TypeError, ffi.new, "char*", u+"x")
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py.test.raises(TypeError, ffi.new, "char*", b"foo")
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#
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p = ffi.new("char[]", [b'a', b'b', b'\x9c'])
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assert len(p) == 3
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assert p[0] == b'a'
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assert p[1] == b'b'
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assert p[2] == b'\x9c'
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p[0] = b'\xff'
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assert p[0] == b'\xff'
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p = ffi.new("char[]", b"abcd")
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assert len(p) == 5
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assert p[4] == b'\x00' # like in C, with: char[] p = "abcd";
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#
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p = ffi.new("char[4]", b"ab")
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assert len(p) == 4
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assert [p[i] for i in range(4)] == [b'a', b'b', b'\x00', b'\x00']
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p = ffi.new("char[2]", b"ab")
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assert len(p) == 2
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assert [p[i] for i in range(2)] == [b'a', b'b']
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py.test.raises(IndexError, ffi.new, "char[2]", b"abc")
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def check_wchar_t(self, ffi):
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try:
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ffi.cast("wchar_t", 0)
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except NotImplementedError:
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py.test.skip("NotImplementedError: wchar_t")
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def test_wchar_t(self):
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self.check_wchar_t(ffi)
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assert ffi.new("wchar_t*", u+'x')[0] == u+'x'
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assert ffi.new("wchar_t*", u+'\u1234')[0] == u+'\u1234'
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if SIZE_OF_WCHAR > 2:
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assert ffi.new("wchar_t*", u+'\U00012345')[0] == u+'\U00012345'
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else:
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py.test.raises(TypeError, ffi.new, "wchar_t*", u+'\U00012345')
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assert ffi.new("wchar_t*")[0] == u+'\x00'
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assert int(ffi.cast("wchar_t", 300)) == 300
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assert not bool(ffi.cast("wchar_t", 0))
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assert bool(ffi.cast("wchar_t", 1))
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assert bool(ffi.cast("wchar_t", 65535))
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if SIZE_OF_WCHAR > 2:
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assert bool(ffi.cast("wchar_t", 65536))
|
|
py.test.raises(TypeError, ffi.new, "wchar_t*", 32)
|
|
py.test.raises(TypeError, ffi.new, "wchar_t*", "foo")
|
|
#
|
|
p = ffi.new("wchar_t[]", [u+'a', u+'b', u+'\u1234'])
|
|
assert len(p) == 3
|
|
assert p[0] == u+'a'
|
|
assert p[1] == u+'b' and type(p[1]) is unicode
|
|
assert p[2] == u+'\u1234'
|
|
p[0] = u+'x'
|
|
assert p[0] == u+'x' and type(p[0]) is unicode
|
|
p[1] = u+'\u1357'
|
|
assert p[1] == u+'\u1357'
|
|
p = ffi.new("wchar_t[]", u+"abcd")
|
|
assert len(p) == 5
|
|
assert p[4] == u+'\x00'
|
|
p = ffi.new("wchar_t[]", u+"a\u1234b")
|
|
assert len(p) == 4
|
|
assert p[1] == u+'\u1234'
|
|
#
|
|
p = ffi.new("wchar_t[]", u+'\U00023456')
|
|
if SIZE_OF_WCHAR == 2:
|
|
assert len(p) == 3
|
|
assert p[0] == u+'\ud84d'
|
|
assert p[1] == u+'\udc56'
|
|
assert p[2] == u+'\x00'
|
|
else:
|
|
assert len(p) == 2
|
|
assert p[0] == u+'\U00023456'
|
|
assert p[1] == u+'\x00'
|
|
#
|
|
p = ffi.new("wchar_t[4]", u+"ab")
|
|
assert len(p) == 4
|
|
assert [p[i] for i in range(4)] == [u+'a', u+'b', u+'\x00', u+'\x00']
|
|
p = ffi.new("wchar_t[2]", u+"ab")
|
|
assert len(p) == 2
|
|
assert [p[i] for i in range(2)] == [u+'a', u+'b']
|
|
py.test.raises(IndexError, ffi.new, "wchar_t[2]", u+"abc")
|
|
|
|
def test_none_as_null_doesnt_work(self):
|
|
p = ffi.new("int*[1]")
|
|
assert p[0] is not None
|
|
assert p[0] != None
|
|
assert p[0] == ffi.NULL
|
|
assert repr(p[0]) == "<cdata 'int *' NULL>"
|
|
#
|
|
n = ffi.new("int*", 99)
|
|
p = ffi.new("int*[]", [n])
|
|
assert p[0][0] == 99
|
|
with pytest.raises(TypeError):
|
|
p[0] = None
|
|
p[0] = ffi.NULL
|
|
assert p[0] == ffi.NULL
|
|
|
|
def test_float(self):
|
|
p = ffi.new("float[]", [-2, -2.5])
|
|
assert p[0] == -2.0
|
|
assert p[1] == -2.5
|
|
p[1] += 17.75
|
|
assert p[1] == 15.25
|
|
#
|
|
p = ffi.new("float*", 15.75)
|
|
assert p[0] == 15.75
|
|
py.test.raises(TypeError, int, p)
|
|
py.test.raises(TypeError, float, p)
|
|
p[0] = 0.0
|
|
assert bool(p) is True
|
|
#
|
|
p = ffi.new("float*", 1.1)
|
|
f = p[0]
|
|
assert f != 1.1 # because of rounding effect
|
|
assert abs(f - 1.1) < 1E-7
|
|
#
|
|
INF = 1E200 * 1E200
|
|
assert 1E200 != INF
|
|
p[0] = 1E200
|
|
assert p[0] == INF # infinite, not enough precision
|
|
|
|
def test_struct_simple(self):
|
|
s = ffi.new("struct simple*")
|
|
assert s.a == s.b == s.c == 0
|
|
s.b = -23
|
|
assert s.b == -23
|
|
with pytest.raises(OverflowError):
|
|
s.b = 32768
|
|
#
|
|
s = ffi.new("struct simple*", [-2, -3])
|
|
assert s.a == -2
|
|
assert s.b == -3
|
|
assert s.c == 0
|
|
with pytest.raises((AttributeError, TypeError)):
|
|
del s.a
|
|
assert repr(s) == "<cdata 'struct simple *' owning %d bytes>" % (
|
|
SIZE_OF_INT + 2 * SIZE_OF_SHORT)
|
|
#
|
|
py.test.raises(ValueError, ffi.new, "struct simple*", [1, 2, 3, 4])
|
|
|
|
def test_constructor_struct_from_dict(self):
|
|
s = ffi.new("struct simple*", {'b': 123, 'c': 456})
|
|
assert s.a == 0
|
|
assert s.b == 123
|
|
assert s.c == 456
|
|
py.test.raises(KeyError, ffi.new, "struct simple*", {'d': 456})
|
|
|
|
def test_struct_pointer(self):
|
|
s = ffi.new("struct simple*")
|
|
assert s[0].a == s[0].b == s[0].c == 0
|
|
s[0].b = -23
|
|
assert s[0].b == s.b == -23
|
|
with pytest.raises(OverflowError):
|
|
s[0].b = -32769
|
|
with pytest.raises(IndexError):
|
|
s[1]
|
|
|
|
def test_struct_opaque(self):
|
|
py.test.raises(ffi.error, ffi.new, "struct baz*")
|
|
# should 'ffi.new("struct baz **") work? it used to, but it was
|
|
# not particularly useful...
|
|
py.test.raises(ffi.error, ffi.new, "struct baz**")
|
|
|
|
def test_pointer_to_struct(self):
|
|
s = ffi.new("struct simple *")
|
|
s.a = -42
|
|
assert s[0].a == -42
|
|
p = ffi.new("struct simple **", s)
|
|
assert p[0].a == -42
|
|
assert p[0][0].a == -42
|
|
p[0].a = -43
|
|
assert s.a == -43
|
|
assert s[0].a == -43
|
|
p[0][0].a = -44
|
|
assert s.a == -44
|
|
assert s[0].a == -44
|
|
s.a = -45
|
|
assert p[0].a == -45
|
|
assert p[0][0].a == -45
|
|
s[0].a = -46
|
|
assert p[0].a == -46
|
|
assert p[0][0].a == -46
|
|
|
|
def test_constructor_struct_of_array(self):
|
|
s = ffi.new("struct array *", [[10, 11], [b'a', b'b', b'c']])
|
|
assert s.a[1] == 11
|
|
assert s.b[2] == b'c'
|
|
s.b[1] = b'X'
|
|
assert s.b[0] == b'a'
|
|
assert s.b[1] == b'X'
|
|
assert s.b[2] == b'c'
|
|
|
|
def test_recursive_struct(self):
|
|
s = ffi.new("struct recursive*")
|
|
t = ffi.new("struct recursive*")
|
|
s.value = 123
|
|
s.next = t
|
|
t.value = 456
|
|
assert s.value == 123
|
|
assert s.next.value == 456
|
|
|
|
def test_union_simple(self):
|
|
u = ffi.new("union simple_u*")
|
|
assert u.a == u.b == u.c == 0
|
|
u.b = -23
|
|
assert u.b == -23
|
|
assert u.a != 0
|
|
with pytest.raises(OverflowError):
|
|
u.b = 32768
|
|
#
|
|
u = ffi.new("union simple_u*", [-2])
|
|
assert u.a == -2
|
|
with pytest.raises((AttributeError, TypeError)):
|
|
del u.a
|
|
assert repr(u) == "<cdata 'union simple_u *' owning %d bytes>" % (
|
|
SIZE_OF_INT,)
|
|
|
|
def test_union_opaque(self):
|
|
py.test.raises(ffi.error, ffi.new, "union baz*")
|
|
# should 'ffi.new("union baz **") work? it used to, but it was
|
|
# not particularly useful...
|
|
py.test.raises(ffi.error, ffi.new, "union baz**")
|
|
|
|
def test_union_initializer(self):
|
|
py.test.raises(TypeError, ffi.new, "union init_u*", b'A')
|
|
py.test.raises(TypeError, ffi.new, "union init_u*", 5)
|
|
py.test.raises(ValueError, ffi.new, "union init_u*", [b'A', 5])
|
|
u = ffi.new("union init_u*", [b'A'])
|
|
assert u.a == b'A'
|
|
py.test.raises(TypeError, ffi.new, "union init_u*", [1005])
|
|
u = ffi.new("union init_u*", {'b': 12345})
|
|
assert u.b == 12345
|
|
u = ffi.new("union init_u*", [])
|
|
assert u.a == b'\x00'
|
|
assert u.b == 0
|
|
|
|
def test_sizeof_type(self):
|
|
for c_type, expected_size in [
|
|
('char', 1),
|
|
('unsigned int', 4),
|
|
('char *', SIZE_OF_PTR),
|
|
('int[5]', 20),
|
|
('struct four_s', 12),
|
|
('union four_u', 4),
|
|
]:
|
|
size = ffi.sizeof(c_type)
|
|
assert size == expected_size, (size, expected_size, ctype)
|
|
|
|
def test_sizeof_cdata(self):
|
|
assert ffi.sizeof(ffi.new("short*")) == SIZE_OF_PTR
|
|
assert ffi.sizeof(ffi.cast("short", 123)) == SIZE_OF_SHORT
|
|
#
|
|
a = ffi.new("int[]", [10, 11, 12, 13, 14])
|
|
assert len(a) == 5
|
|
assert ffi.sizeof(a) == 5 * SIZE_OF_INT
|
|
|
|
def test_string_from_char_pointer(self):
|
|
x = ffi.new("char*", b"x")
|
|
assert str(x) == repr(x)
|
|
assert ffi.string(x) == b"x"
|
|
assert ffi.string(ffi.new("char*", b"\x00")) == b""
|
|
py.test.raises(TypeError, ffi.new, "char*", unicode("foo"))
|
|
|
|
def test_unicode_from_wchar_pointer(self):
|
|
self.check_wchar_t(ffi)
|
|
x = ffi.new("wchar_t*", u+"x")
|
|
assert unicode(x) == unicode(repr(x))
|
|
assert ffi.string(x) == u+"x"
|
|
assert ffi.string(ffi.new("wchar_t*", u+"\x00")) == u+""
|
|
|
|
def test_string_from_char_array(self):
|
|
p = ffi.new("char[]", b"hello.")
|
|
p[5] = b'!'
|
|
assert ffi.string(p) == b"hello!"
|
|
p[6] = b'?'
|
|
assert ffi.string(p) == b"hello!?"
|
|
p[3] = b'\x00'
|
|
assert ffi.string(p) == b"hel"
|
|
assert ffi.string(p, 2) == b"he"
|
|
with pytest.raises(IndexError):
|
|
p[7] = b'X'
|
|
#
|
|
a = ffi.new("char[]", b"hello\x00world")
|
|
assert len(a) == 12
|
|
p = ffi.cast("char *", a)
|
|
assert ffi.string(p) == b'hello'
|
|
|
|
def test_string_from_wchar_array(self):
|
|
self.check_wchar_t(ffi)
|
|
assert ffi.string(ffi.cast("wchar_t", "x")) == u+"x"
|
|
assert ffi.string(ffi.cast("wchar_t", u+"x")) == u+"x"
|
|
x = ffi.cast("wchar_t", "x")
|
|
assert str(x) == repr(x)
|
|
assert ffi.string(x) == u+"x"
|
|
#
|
|
p = ffi.new("wchar_t[]", u+"hello.")
|
|
p[5] = u+'!'
|
|
assert ffi.string(p) == u+"hello!"
|
|
p[6] = u+'\u04d2'
|
|
assert ffi.string(p) == u+"hello!\u04d2"
|
|
p[3] = u+'\x00'
|
|
assert ffi.string(p) == u+"hel"
|
|
assert ffi.string(p, 123) == u+"hel"
|
|
with pytest.raises(IndexError):
|
|
p[7] = u+'X'
|
|
#
|
|
a = ffi.new("wchar_t[]", u+"hello\x00world")
|
|
assert len(a) == 12
|
|
p = ffi.cast("wchar_t *", a)
|
|
assert ffi.string(p) == u+'hello'
|
|
assert ffi.string(p, 123) == u+'hello'
|
|
assert ffi.string(p, 5) == u+'hello'
|
|
assert ffi.string(p, 2) == u+'he'
|
|
|
|
def test_fetch_const_char_p_field(self):
|
|
# 'const' is ignored so far, in the declaration of 'struct string'
|
|
t = ffi.new("const char[]", b"testing")
|
|
s = ffi.new("struct string*", [t])
|
|
assert type(s.name) not in (bytes, str, unicode)
|
|
assert ffi.string(s.name) == b"testing"
|
|
with pytest.raises(TypeError):
|
|
s.name = None
|
|
s.name = ffi.NULL
|
|
assert s.name == ffi.NULL
|
|
|
|
def test_fetch_const_wchar_p_field(self):
|
|
# 'const' is ignored so far
|
|
self.check_wchar_t(ffi)
|
|
t = ffi.new("const wchar_t[]", u+"testing")
|
|
s = ffi.new("struct ustring*", [t])
|
|
assert type(s.name) not in (bytes, str, unicode)
|
|
assert ffi.string(s.name) == u+"testing"
|
|
s.name = ffi.NULL
|
|
assert s.name == ffi.NULL
|
|
|
|
def test_voidp(self):
|
|
py.test.raises(TypeError, ffi.new, "void*")
|
|
p = ffi.new("void **")
|
|
assert p[0] == ffi.NULL
|
|
a = ffi.new("int[]", [10, 11, 12])
|
|
p = ffi.new("void **", a)
|
|
vp = p[0]
|
|
with pytest.raises(TypeError):
|
|
vp[0]
|
|
py.test.raises(TypeError, ffi.new, "short **", a)
|
|
#
|
|
s = ffi.new("struct voidp *")
|
|
s.p = a # works
|
|
s.q = a # works
|
|
with pytest.raises(TypeError):
|
|
s.r = a # fails
|
|
b = ffi.cast("int *", a)
|
|
s.p = b # works
|
|
s.q = b # works
|
|
with pytest.raises(TypeError):
|
|
s.r = b # fails
|
|
|
|
def test_functionptr_simple(self):
|
|
py.test.raises(TypeError, ffi.callback, "int(*)(int)", 0)
|
|
def cb(n):
|
|
return n + 1
|
|
cb.__qualname__ = 'cb'
|
|
p = ffi.callback("int(*)(int)", cb)
|
|
res = p(41) # calling an 'int(*)(int)', i.e. a function pointer
|
|
assert res == 42 and type(res) is int
|
|
res = p(ffi.cast("int", -41))
|
|
assert res == -40 and type(res) is int
|
|
assert repr(p).startswith(
|
|
"<cdata 'int(*)(int)' calling <function cb at 0x")
|
|
assert ffi.typeof(p) is ffi.typeof("int(*)(int)")
|
|
q = ffi.new("int(**)(int)", p)
|
|
assert repr(q) == "<cdata 'int(* *)(int)' owning %d bytes>" % (
|
|
SIZE_OF_PTR)
|
|
with pytest.raises(TypeError):
|
|
q(43)
|
|
res = q[0](43)
|
|
assert res == 44
|
|
q = ffi.cast("int(*)(int)", p)
|
|
assert repr(q).startswith("<cdata 'int(*)(int)' 0x")
|
|
res = q(45)
|
|
assert res == 46
|
|
|
|
def test_functionptr_advanced(self):
|
|
t = ffi.typeof("int(*(*)(int))(int)")
|
|
assert repr(t) == "<ctype '%s'>" % "int(*(*)(int))(int)"
|
|
|
|
def test_functionptr_voidptr_return(self):
|
|
def cb():
|
|
return ffi.NULL
|
|
p = ffi.callback("void*(*)()", cb)
|
|
res = p()
|
|
assert res is not None
|
|
assert res == ffi.NULL
|
|
int_ptr = ffi.new('int*')
|
|
void_ptr = ffi.cast('void*', int_ptr)
|
|
def cb():
|
|
return void_ptr
|
|
p = ffi.callback("void*(*)()", cb)
|
|
res = p()
|
|
assert res == void_ptr
|
|
|
|
def test_functionptr_intptr_return(self):
|
|
def cb():
|
|
return ffi.NULL
|
|
p = ffi.callback("int*(*)()", cb)
|
|
res = p()
|
|
assert res == ffi.NULL
|
|
int_ptr = ffi.new('int*')
|
|
def cb():
|
|
return int_ptr
|
|
p = ffi.callback("int*(*)()", cb)
|
|
res = p()
|
|
assert repr(res).startswith("<cdata 'int *' 0x")
|
|
assert res == int_ptr
|
|
int_array_ptr = ffi.new('int[1]')
|
|
def cb():
|
|
return int_array_ptr
|
|
p = ffi.callback("int*(*)()", cb)
|
|
res = p()
|
|
assert repr(res).startswith("<cdata 'int *' 0x")
|
|
assert res == int_array_ptr
|
|
|
|
def test_functionptr_void_return(self):
|
|
def foo():
|
|
pass
|
|
foo_cb = ffi.callback("void foo()", foo)
|
|
result = foo_cb()
|
|
assert result is None
|
|
|
|
def test_char_cast(self):
|
|
p = ffi.cast("int", b'\x01')
|
|
assert ffi.typeof(p) is ffi.typeof("int")
|
|
assert int(p) == 1
|
|
p = ffi.cast("int", ffi.cast("char", b"a"))
|
|
assert int(p) == ord("a")
|
|
p = ffi.cast("int", ffi.cast("char", b"\x80"))
|
|
assert int(p) == 0x80 # "char" is considered unsigned in this case
|
|
p = ffi.cast("int", b"\x81")
|
|
assert int(p) == 0x81
|
|
|
|
def test_wchar_cast(self):
|
|
self.check_wchar_t(ffi)
|
|
p = ffi.cast("int", ffi.cast("wchar_t", u+'\u1234'))
|
|
assert int(p) == 0x1234
|
|
p = ffi.cast("long long", ffi.cast("wchar_t", -1))
|
|
if SIZE_OF_WCHAR == 2: # 2 bytes, unsigned
|
|
assert int(p) == 0xffff
|
|
elif (sys.platform.startswith('linux') and
|
|
platform.machine().startswith('x86')): # known to be signed
|
|
assert int(p) == -1
|
|
else: # in general, it can be either signed or not
|
|
assert int(p) in [-1, 0xffffffff] # e.g. on arm, both cases occur
|
|
p = ffi.cast("int", u+'\u1234')
|
|
assert int(p) == 0x1234
|
|
|
|
def test_cast_array_to_charp(self):
|
|
a = ffi.new("short int[]", [0x1234, 0x5678])
|
|
p = ffi.cast("char*", a)
|
|
data = b''.join([p[i] for i in range(4)])
|
|
if sys.byteorder == 'little':
|
|
assert data == b'\x34\x12\x78\x56'
|
|
else:
|
|
assert data == b'\x12\x34\x56\x78'
|
|
|
|
def test_cast_between_pointers(self):
|
|
a = ffi.new("short int[]", [0x1234, 0x5678])
|
|
p = ffi.cast("short*", a)
|
|
p2 = ffi.cast("int*", p)
|
|
q = ffi.cast("char*", p2)
|
|
data = b''.join([q[i] for i in range(4)])
|
|
if sys.byteorder == 'little':
|
|
assert data == b'\x34\x12\x78\x56'
|
|
else:
|
|
assert data == b'\x12\x34\x56\x78'
|
|
|
|
def test_cast_pointer_and_int(self):
|
|
a = ffi.new("short int[]", [0x1234, 0x5678])
|
|
l1 = ffi.cast("intptr_t", a)
|
|
p = ffi.cast("short*", a)
|
|
l2 = ffi.cast("intptr_t", p)
|
|
assert int(l1) == int(l2) != 0
|
|
q = ffi.cast("short*", l1)
|
|
assert q == ffi.cast("short*", int(l1))
|
|
assert q[0] == 0x1234
|
|
assert int(ffi.cast("intptr_t", ffi.NULL)) == 0
|
|
|
|
def test_cast_functionptr_and_int(self):
|
|
def cb(n):
|
|
return n + 1
|
|
a = ffi.callback("int(*)(int)", cb)
|
|
p = ffi.cast("void *", a)
|
|
assert p
|
|
b = ffi.cast("int(*)(int)", p)
|
|
assert b(41) == 42
|
|
assert a == b
|
|
assert hash(a) == hash(b)
|
|
|
|
def test_callback_crash(self):
|
|
def cb(n):
|
|
raise Exception
|
|
a = ffi.callback("int(*)(int)", cb, error=42)
|
|
res = a(1) # and the error reported to stderr
|
|
assert res == 42
|
|
|
|
def test_structptr_argument(self):
|
|
def cb(p):
|
|
return p[0].a * 1000 + p[0].b * 100 + p[1].a * 10 + p[1].b
|
|
a = ffi.callback("int(*)(struct ab[])", cb)
|
|
res = a([[5, 6], {'a': 7, 'b': 8}])
|
|
assert res == 5678
|
|
res = a([[5], {'b': 8}])
|
|
assert res == 5008
|
|
|
|
def test_array_argument_as_list(self):
|
|
seen = []
|
|
def cb(argv):
|
|
seen.append(ffi.string(argv[0]))
|
|
seen.append(ffi.string(argv[1]))
|
|
a = ffi.callback("void(*)(char *[])", cb)
|
|
a([ffi.new("char[]", b"foobar"), ffi.new("char[]", b"baz")])
|
|
assert seen == [b"foobar", b"baz"]
|
|
|
|
def test_cast_float(self):
|
|
a = ffi.cast("float", 12)
|
|
assert float(a) == 12.0
|
|
a = ffi.cast("float", 12.5)
|
|
assert float(a) == 12.5
|
|
a = ffi.cast("float", b"A")
|
|
assert float(a) == ord("A")
|
|
a = ffi.cast("int", 12.9)
|
|
assert int(a) == 12
|
|
a = ffi.cast("char", 66.9 + 256)
|
|
assert ffi.string(a) == b"B"
|
|
#
|
|
a = ffi.cast("float", ffi.cast("int", 12))
|
|
assert float(a) == 12.0
|
|
a = ffi.cast("float", ffi.cast("double", 12.5))
|
|
assert float(a) == 12.5
|
|
a = ffi.cast("float", ffi.cast("char", b"A"))
|
|
assert float(a) == ord("A")
|
|
a = ffi.cast("int", ffi.cast("double", 12.9))
|
|
assert int(a) == 12
|
|
a = ffi.cast("char", ffi.cast("double", 66.9 + 256))
|
|
assert ffi.string(a) == b"B"
|
|
|
|
def test_enum(self):
|
|
# enum foq { A0, B0, CC0, D0 };
|
|
assert ffi.string(ffi.cast("enum foq", 0)) == "cffiA0"
|
|
assert ffi.string(ffi.cast("enum foq", 2)) == "cffiCC0"
|
|
assert ffi.string(ffi.cast("enum foq", 3)) == "cffiD0"
|
|
assert ffi.string(ffi.cast("enum foq", 4)) == "4"
|
|
# enum bar { A1, B1=-2, CC1, D1, E1 };
|
|
assert ffi.string(ffi.cast("enum bar", 0)) == "A1"
|
|
assert ffi.string(ffi.cast("enum bar", -2)) == "B1"
|
|
assert ffi.string(ffi.cast("enum bar", -1)) == "CC1"
|
|
assert ffi.string(ffi.cast("enum bar", 1)) == "E1"
|
|
assert ffi.cast("enum bar", -2) == ffi.cast("enum bar", -2)
|
|
assert ffi.cast("enum foq", 0) == ffi.cast("enum bar", 0)
|
|
assert ffi.cast("enum bar", 0) == ffi.cast("int", 0)
|
|
assert repr(ffi.cast("enum bar", -1)) == "<cdata 'enum bar' -1: CC1>"
|
|
assert repr(ffi.cast("enum foq", -1)) == ( # enums are unsigned, if
|
|
"<cdata 'enum foq' 4294967295>") or ( # they contain no neg value
|
|
sys.platform == "win32") # (but not on msvc)
|
|
# enum baz { A2=0x1000, B2=0x2000 };
|
|
assert ffi.string(ffi.cast("enum baz", 0x1000)) == "A2"
|
|
assert ffi.string(ffi.cast("enum baz", 0x2000)) == "B2"
|
|
|
|
def test_enum_in_struct(self):
|
|
# enum foo2 { A3, B3, C3, D3 };
|
|
# struct bar_with_e { enum foo2 e; };
|
|
s = ffi.new("struct bar_with_e *")
|
|
s.e = 0
|
|
assert s.e == 0
|
|
s.e = 3
|
|
assert s.e == 3
|
|
assert s[0].e == 3
|
|
s[0].e = 2
|
|
assert s.e == 2
|
|
assert s[0].e == 2
|
|
s.e = ffi.cast("enum foo2", -1)
|
|
assert s.e in (4294967295, -1) # two choices
|
|
assert s[0].e in (4294967295, -1)
|
|
s.e = s.e
|
|
with pytest.raises(TypeError):
|
|
s.e = 'B3'
|
|
with pytest.raises(TypeError):
|
|
s.e = '2'
|
|
with pytest.raises(TypeError):
|
|
s.e = '#2'
|
|
with pytest.raises(TypeError):
|
|
s.e = '#7'
|
|
|
|
def test_enum_non_contiguous(self):
|
|
# enum noncont { A4, B4=42, C4 };
|
|
assert ffi.string(ffi.cast("enum noncont", 0)) == "A4"
|
|
assert ffi.string(ffi.cast("enum noncont", 42)) == "B4"
|
|
assert ffi.string(ffi.cast("enum noncont", 43)) == "C4"
|
|
invalid_value = ffi.cast("enum noncont", 2)
|
|
assert int(invalid_value) == 2
|
|
assert ffi.string(invalid_value) == "2"
|
|
|
|
def test_enum_char_hex_oct(self):
|
|
# enum etypes {A5='!', B5='\'', C5=0x10, D5=010, E5=- 0x10, F5=-010};
|
|
assert ffi.string(ffi.cast("enum etypes", ord('!'))) == "A5"
|
|
assert ffi.string(ffi.cast("enum etypes", ord("'"))) == "B5"
|
|
assert ffi.string(ffi.cast("enum etypes", 16)) == "C5"
|
|
assert ffi.string(ffi.cast("enum etypes", 8)) == "D5"
|
|
assert ffi.string(ffi.cast("enum etypes", -16)) == "E5"
|
|
assert ffi.string(ffi.cast("enum etypes", -8)) == "F5"
|
|
|
|
def test_array_of_struct(self):
|
|
s = ffi.new("struct ab[1]")
|
|
with pytest.raises(AttributeError):
|
|
s.b
|
|
with pytest.raises(AttributeError):
|
|
s.b = 412
|
|
s[0].b = 412
|
|
assert s[0].b == 412
|
|
with pytest.raises(IndexError):
|
|
s[1]
|
|
|
|
def test_pointer_to_array(self):
|
|
p = ffi.new("int(**)[5]")
|
|
assert repr(p) == "<cdata 'int(* *)[5]' owning %d bytes>" % SIZE_OF_PTR
|
|
|
|
def test_iterate_array(self):
|
|
a = ffi.new("char[]", b"hello")
|
|
assert list(a) == [b"h", b"e", b"l", b"l", b"o", b"\0"]
|
|
assert list(iter(a)) == [b"h", b"e", b"l", b"l", b"o", b"\0"]
|
|
#
|
|
py.test.raises(TypeError, iter, ffi.cast("char *", a))
|
|
py.test.raises(TypeError, list, ffi.cast("char *", a))
|
|
py.test.raises(TypeError, iter, ffi.new("int *"))
|
|
py.test.raises(TypeError, list, ffi.new("int *"))
|
|
|
|
def test_offsetof(self):
|
|
# struct abc { int a, b, c; };
|
|
assert ffi.offsetof("struct abc", "a") == 0
|
|
assert ffi.offsetof("struct abc", "b") == 4
|
|
assert ffi.offsetof("struct abc", "c") == 8
|
|
|
|
def test_offsetof_nested(self):
|
|
# struct nesting { struct abc d, e; };
|
|
assert ffi.offsetof("struct nesting", "e") == 12
|
|
py.test.raises(KeyError, ffi.offsetof, "struct nesting", "e.a")
|
|
assert ffi.offsetof("struct nesting", "e", "a") == 12
|
|
assert ffi.offsetof("struct nesting", "e", "b") == 16
|
|
assert ffi.offsetof("struct nesting", "e", "c") == 20
|
|
|
|
def test_offsetof_array(self):
|
|
assert ffi.offsetof("int[]", 51) == 51 * ffi.sizeof("int")
|
|
assert ffi.offsetof("int *", 51) == 51 * ffi.sizeof("int")
|
|
# struct array2 { int a, b; int c[99]; };
|
|
assert ffi.offsetof("struct array2", "c") == 2 * ffi.sizeof("int")
|
|
assert ffi.offsetof("struct array2", "c", 0) == 2 * ffi.sizeof("int")
|
|
assert ffi.offsetof("struct array2", "c", 51) == 53 * ffi.sizeof("int")
|
|
|
|
def test_alignof(self):
|
|
# struct align { char a; short b; char c; };
|
|
assert ffi.alignof("int") == 4
|
|
assert ffi.alignof("double") in (4, 8)
|
|
assert ffi.alignof("struct align") == 2
|
|
|
|
def test_bitfield(self):
|
|
# struct bitfield { int a:10, b:20, c:3; };
|
|
assert ffi.sizeof("struct bitfield") == 8
|
|
s = ffi.new("struct bitfield *")
|
|
s.a = 511
|
|
with pytest.raises(OverflowError):
|
|
s.a = 512
|
|
with pytest.raises(OverflowError):
|
|
s[0].a = 512
|
|
assert s.a == 511
|
|
s.a = -512
|
|
with pytest.raises(OverflowError):
|
|
s.a = -513
|
|
with pytest.raises(OverflowError):
|
|
s[0].a = -513
|
|
assert s.a == -512
|
|
s.c = 3
|
|
assert s.c == 3
|
|
with pytest.raises(OverflowError):
|
|
s.c = 4
|
|
with pytest.raises(OverflowError):
|
|
s[0].c = 4
|
|
s.c = -4
|
|
assert s.c == -4
|
|
|
|
def test_bitfield_enum(self):
|
|
# typedef enum { AA1, BB1, CC1 } foo_e_t;
|
|
# typedef struct { foo_e_t f:2; } bfenum_t;
|
|
if sys.platform == "win32":
|
|
py.test.skip("enums are not unsigned")
|
|
s = ffi.new("bfenum_t *")
|
|
s.f = 2
|
|
assert s.f == 2
|
|
|
|
def test_anonymous_struct(self):
|
|
# typedef struct { int a; } anon_foo_t;
|
|
# typedef struct { char b, c; } anon_bar_t;
|
|
f = ffi.new("anon_foo_t *", [12345])
|
|
b = ffi.new("anon_bar_t *", [b"B", b"C"])
|
|
assert f.a == 12345
|
|
assert b.b == b"B"
|
|
assert b.c == b"C"
|
|
assert repr(b).startswith("<cdata 'anon_bar_t *'")
|
|
|
|
def test_struct_with_two_usages(self):
|
|
# typedef struct named_foo_s { int a; } named_foo_t, *named_foo_p;
|
|
# typedef struct { int a; } unnamed_foo_t, *unnamed_foo_p;
|
|
f = ffi.new("named_foo_t *", [12345])
|
|
ps = ffi.new("named_foo_p[]", [f])
|
|
f = ffi.new("unnamed_foo_t *", [12345])
|
|
ps = ffi.new("unnamed_foo_p[]", [f])
|
|
|
|
def test_pointer_arithmetic(self):
|
|
s = ffi.new("short[]", list(range(100, 110)))
|
|
p = ffi.cast("short *", s)
|
|
assert p[2] == 102
|
|
assert p+1 == p+1
|
|
assert p+1 != p+0
|
|
assert p == p+0 == p-0
|
|
assert (p+1)[0] == 101
|
|
assert (p+19)[-10] == 109
|
|
assert (p+5) - (p+1) == 4
|
|
assert p == s+0
|
|
assert p+1 == s+1
|
|
|
|
def test_pointer_comparison(self):
|
|
s = ffi.new("short[]", list(range(100)))
|
|
p = ffi.cast("short *", s)
|
|
assert (p < s) is False
|
|
assert (p <= s) is True
|
|
assert (p == s) is True
|
|
assert (p != s) is False
|
|
assert (p > s) is False
|
|
assert (p >= s) is True
|
|
assert (s < p) is False
|
|
assert (s <= p) is True
|
|
assert (s == p) is True
|
|
assert (s != p) is False
|
|
assert (s > p) is False
|
|
assert (s >= p) is True
|
|
q = p + 1
|
|
assert (q < s) is False
|
|
assert (q <= s) is False
|
|
assert (q == s) is False
|
|
assert (q != s) is True
|
|
assert (q > s) is True
|
|
assert (q >= s) is True
|
|
assert (s < q) is True
|
|
assert (s <= q) is True
|
|
assert (s == q) is False
|
|
assert (s != q) is True
|
|
assert (s > q) is False
|
|
assert (s >= q) is False
|
|
assert (q < p) is False
|
|
assert (q <= p) is False
|
|
assert (q == p) is False
|
|
assert (q != p) is True
|
|
assert (q > p) is True
|
|
assert (q >= p) is True
|
|
assert (p < q) is True
|
|
assert (p <= q) is True
|
|
assert (p == q) is False
|
|
assert (p != q) is True
|
|
assert (p > q) is False
|
|
assert (p >= q) is False
|
|
#
|
|
assert (None == s) is False
|
|
assert (None != s) is True
|
|
assert (s == None) is False
|
|
assert (s != None) is True
|
|
assert (None == q) is False
|
|
assert (None != q) is True
|
|
assert (q == None) is False
|
|
assert (q != None) is True
|
|
|
|
def test_integer_comparison(self):
|
|
x = ffi.cast("int", 123)
|
|
y = ffi.cast("int", 456)
|
|
assert x < y
|
|
#
|
|
z = ffi.cast("double", 78.9)
|
|
assert x > z
|
|
assert y > z
|
|
|
|
def test_ffi_buffer_ptr(self):
|
|
a = ffi.new("short *", 100)
|
|
try:
|
|
b = ffi.buffer(a)
|
|
except NotImplementedError as e:
|
|
py.test.skip(str(e))
|
|
content = b[:]
|
|
assert len(content) == len(b) == 2
|
|
if sys.byteorder == 'little':
|
|
assert content == b'\x64\x00'
|
|
assert b[0] == b'\x64'
|
|
b[0] = b'\x65'
|
|
else:
|
|
assert content == b'\x00\x64'
|
|
assert b[1] == b'\x64'
|
|
b[1] = b'\x65'
|
|
assert a[0] == 101
|
|
|
|
def test_ffi_buffer_array(self):
|
|
a = ffi.new("int[]", list(range(100, 110)))
|
|
try:
|
|
b = ffi.buffer(a)
|
|
except NotImplementedError as e:
|
|
py.test.skip(str(e))
|
|
content = b[:]
|
|
if sys.byteorder == 'little':
|
|
assert content.startswith(b'\x64\x00\x00\x00\x65\x00\x00\x00')
|
|
b[4] = b'\x45'
|
|
else:
|
|
assert content.startswith(b'\x00\x00\x00\x64\x00\x00\x00\x65')
|
|
b[7] = b'\x45'
|
|
assert len(content) == 4 * 10
|
|
assert a[1] == 0x45
|
|
|
|
def test_ffi_buffer_ptr_size(self):
|
|
a = ffi.new("short *", 0x4243)
|
|
try:
|
|
b = ffi.buffer(a, 1)
|
|
except NotImplementedError as e:
|
|
py.test.skip(str(e))
|
|
content = b[:]
|
|
assert len(content) == 1
|
|
if sys.byteorder == 'little':
|
|
assert content == b'\x43'
|
|
b[0] = b'\x62'
|
|
assert a[0] == 0x4262
|
|
else:
|
|
assert content == b'\x42'
|
|
b[0] = b'\x63'
|
|
assert a[0] == 0x6343
|
|
|
|
def test_ffi_buffer_array_size(self):
|
|
a1 = ffi.new("int[]", list(range(100, 110)))
|
|
a2 = ffi.new("int[]", list(range(100, 115)))
|
|
try:
|
|
ffi.buffer(a1)
|
|
except NotImplementedError as e:
|
|
py.test.skip(str(e))
|
|
assert ffi.buffer(a1)[:] == ffi.buffer(a2, 4*10)[:]
|
|
|
|
def test_ffi_buffer_with_file(self):
|
|
import tempfile, os, array
|
|
fd, filename = tempfile.mkstemp()
|
|
f = os.fdopen(fd, 'r+b')
|
|
a = ffi.new("int[]", list(range(1005)))
|
|
try:
|
|
ffi.buffer(a, 512)
|
|
except NotImplementedError as e:
|
|
py.test.skip(str(e))
|
|
f.write(ffi.buffer(a, 1000 * ffi.sizeof("int")))
|
|
f.seek(0)
|
|
assert f.read() == arraytostring(array.array('i', range(1000)))
|
|
f.seek(0)
|
|
b = ffi.new("int[]", 1005)
|
|
f.readinto(ffi.buffer(b, 1000 * ffi.sizeof("int")))
|
|
assert list(a)[:1000] + [0] * (len(a)-1000) == list(b)
|
|
f.close()
|
|
os.unlink(filename)
|
|
|
|
def test_ffi_buffer_with_io(self):
|
|
import io, array
|
|
f = io.BytesIO()
|
|
a = ffi.new("int[]", list(range(1005)))
|
|
try:
|
|
ffi.buffer(a, 512)
|
|
except NotImplementedError as e:
|
|
py.test.skip(str(e))
|
|
f.write(ffi.buffer(a, 1000 * ffi.sizeof("int")))
|
|
f.seek(0)
|
|
assert f.read() == arraytostring(array.array('i', range(1000)))
|
|
f.seek(0)
|
|
b = ffi.new("int[]", 1005)
|
|
f.readinto(ffi.buffer(b, 1000 * ffi.sizeof("int")))
|
|
assert list(a)[:1000] + [0] * (len(a)-1000) == list(b)
|
|
f.close()
|
|
|
|
def test_array_in_struct(self):
|
|
# struct array { int a[2]; char b[3]; };
|
|
p = ffi.new("struct array *")
|
|
p.a[1] = 5
|
|
assert p.a[1] == 5
|
|
assert repr(p.a).startswith("<cdata 'int[2]' 0x")
|
|
|
|
def test_struct_containing_array_varsize_workaround(self):
|
|
if sys.platform == "win32":
|
|
py.test.skip("array of length 0 not supported")
|
|
# struct array0 { int len; short data[0]; };
|
|
p = ffi.new("char[]", ffi.sizeof("struct array0") + 7 * SIZE_OF_SHORT)
|
|
q = ffi.cast("struct array0 *", p)
|
|
assert q.len == 0
|
|
# 'q.data' gets not a 'short[0]', but just a 'short *' instead
|
|
assert repr(q.data).startswith("<cdata 'short *' 0x")
|
|
assert q.data[6] == 0
|
|
q.data[6] = 15
|
|
assert q.data[6] == 15
|
|
|
|
def test_new_struct_containing_array_varsize(self):
|
|
py.test.skip("later?")
|
|
ffi.cdef("struct foo_s { int len; short data[]; };")
|
|
p = ffi.new("struct foo_s *", 10) # a single integer is the length
|
|
assert p.len == 0
|
|
assert p.data[9] == 0
|
|
with pytest.raises(IndexError):
|
|
p.data[10]
|
|
|
|
def test_ffi_typeof_getcname(self):
|
|
assert ffi.getctype("int") == "int"
|
|
assert ffi.getctype("int", 'x') == "int x"
|
|
assert ffi.getctype("int*") == "int *"
|
|
assert ffi.getctype("int*", '') == "int *"
|
|
assert ffi.getctype("int*", 'x') == "int * x"
|
|
assert ffi.getctype("int", '*') == "int *"
|
|
assert ffi.getctype("int", ' * x ') == "int * x"
|
|
assert ffi.getctype(ffi.typeof("int*"), '*') == "int * *"
|
|
assert ffi.getctype("int", '[5]') == "int[5]"
|
|
assert ffi.getctype("int[5]", '[6]') == "int[6][5]"
|
|
assert ffi.getctype("int[5]", '(*)') == "int(*)[5]"
|
|
# special-case for convenience: automatically put '()' around '*'
|
|
assert ffi.getctype("int[5]", '*') == "int(*)[5]"
|
|
assert ffi.getctype("int[5]", '*foo') == "int(*foo)[5]"
|
|
assert ffi.getctype("int[5]", ' ** foo ') == "int(** foo)[5]"
|
|
|
|
def test_array_of_func_ptr(self):
|
|
f = ffi.cast("int(*)(int)", 42)
|
|
assert f != ffi.NULL
|
|
py.test.raises(ffi.error, ffi.cast, "int(int)", 42)
|
|
py.test.raises(ffi.error, ffi.new, "int([5])(int)")
|
|
a = ffi.new("int(*[5])(int)", [f])
|
|
assert ffi.getctype(ffi.typeof(a)) == "int(*[5])(int)"
|
|
assert len(a) == 5
|
|
assert a[0] == f
|
|
assert a[1] == ffi.NULL
|
|
py.test.raises(TypeError, ffi.cast, "int(*)(int)[5]", 0)
|
|
#
|
|
def cb(n):
|
|
return n + 1
|
|
f = ffi.callback("int(*)(int)", cb)
|
|
a = ffi.new("int(*[5])(int)", [f, f])
|
|
assert a[1](42) == 43
|
|
|
|
def test_callback_as_function_argument(self):
|
|
# In C, function arguments can be declared with a function type,
|
|
# which is automatically replaced with the ptr-to-function type.
|
|
def cb(a, b):
|
|
return chr(ord(a) + ord(b)).encode()
|
|
f = ffi.callback("char cb(char, char)", cb)
|
|
assert f(b'A', b'\x01') == b'B'
|
|
def g(callback):
|
|
return callback(b'A', b'\x01')
|
|
g = ffi.callback("char g(char cb(char, char))", g)
|
|
assert g(f) == b'B'
|
|
|
|
def test_vararg_callback(self):
|
|
py.test.skip("callback with '...'")
|
|
def cb(i, va_list):
|
|
j = ffi.va_arg(va_list, "int")
|
|
k = ffi.va_arg(va_list, "long long")
|
|
return i * 2 + j * 3 + k * 5
|
|
f = ffi.callback("long long cb(long i, ...)", cb)
|
|
res = f(10, ffi.cast("int", 100), ffi.cast("long long", 1000))
|
|
assert res == 20 + 300 + 5000
|
|
|
|
def test_callback_decorator(self):
|
|
#
|
|
@ffi.callback("long(long, long)", error=42)
|
|
def cb(a, b):
|
|
return a - b
|
|
#
|
|
assert cb(-100, -10) == -90
|
|
sz = ffi.sizeof("long")
|
|
assert cb((1 << (sz*8-1)) - 1, -10) == 42
|
|
|
|
def test_anonymous_enum(self):
|
|
# typedef enum { Value0 = 0 } e_t, *pe_t;
|
|
assert ffi.getctype("e_t*") == 'e_t *'
|
|
assert ffi.getctype("pe_t") == 'e_t *'
|
|
assert ffi.getctype("foo_e_t*") == 'foo_e_t *'
|
|
|
|
def test_new_ctype(self):
|
|
p = ffi.new("int *")
|
|
py.test.raises(TypeError, ffi.new, p)
|
|
p = ffi.new(ffi.typeof("int *"), 42)
|
|
assert p[0] == 42
|
|
|
|
def test_enum_with_non_injective_mapping(self):
|
|
# enum e_noninj { AA3=0, BB3=0, CC3=0, DD3=0 };
|
|
e = ffi.cast("enum e_noninj", 0)
|
|
assert ffi.string(e) == "AA3" # pick the first one arbitrarily
|
|
|
|
def test_enum_refer_previous_enum_value(self):
|
|
# enum e_prev { AA4, BB4=2, CC4=4, DD4=BB4, EE4, FF4=CC4, GG4=FF4 };
|
|
assert ffi.string(ffi.cast("enum e_prev", 2)) == "BB4"
|
|
assert ffi.string(ffi.cast("enum e_prev", 3)) == "EE4"
|
|
assert ffi.sizeof("char[DD4]") == 2
|
|
assert ffi.sizeof("char[EE4]") == 3
|
|
assert ffi.sizeof("char[FF4]") == 4
|
|
assert ffi.sizeof("char[GG4]") == 4
|
|
|
|
def test_nested_anonymous_struct(self):
|
|
# struct nested_anon {
|
|
# struct { int a, b; };
|
|
# union { int c, d; };
|
|
# };
|
|
assert ffi.sizeof("struct nested_anon") == 3 * SIZE_OF_INT
|
|
p = ffi.new("struct nested_anon *", [1, 2, 3])
|
|
assert p.a == 1
|
|
assert p.b == 2
|
|
assert p.c == 3
|
|
assert p.d == 3
|
|
p.d = 17
|
|
assert p.c == 17
|
|
p.b = 19
|
|
assert p.a == 1
|
|
assert p.b == 19
|
|
assert p.c == 17
|
|
assert p.d == 17
|
|
p = ffi.new("struct nested_anon *", {'b': 12, 'd': 14})
|
|
assert p.a == 0
|
|
assert p.b == 12
|
|
assert p.c == 14
|
|
assert p.d == 14
|
|
|
|
def test_nested_field_offset_align(self):
|
|
# struct nested_field_ofs_s {
|
|
# struct { int a; char b; };
|
|
# union { char c; };
|
|
# };
|
|
assert ffi.offsetof("struct nested_field_ofs_s", "c") == 2 * SIZE_OF_INT
|
|
assert ffi.sizeof("struct nested_field_ofs_s") == 3 * SIZE_OF_INT
|
|
|
|
def test_nested_anonymous_union(self):
|
|
# union nested_anon_u {
|
|
# struct { int a, b; };
|
|
# union { int c, d; };
|
|
# };
|
|
assert ffi.sizeof("union nested_anon_u") == 2 * SIZE_OF_INT
|
|
p = ffi.new("union nested_anon_u *", [5])
|
|
assert p.a == 5
|
|
assert p.b == 0
|
|
assert p.c == 5
|
|
assert p.d == 5
|
|
p.d = 17
|
|
assert p.c == 17
|
|
assert p.a == 17
|
|
p.b = 19
|
|
assert p.a == 17
|
|
assert p.b == 19
|
|
assert p.c == 17
|
|
assert p.d == 17
|
|
p = ffi.new("union nested_anon_u *", {'d': 14})
|
|
assert p.a == 14
|
|
assert p.b == 0
|
|
assert p.c == 14
|
|
assert p.d == 14
|
|
p = ffi.new("union nested_anon_u *", {'b': 12})
|
|
assert p.a == 0
|
|
assert p.b == 12
|
|
assert p.c == 0
|
|
assert p.d == 0
|
|
# we cannot specify several items in the dict, even though
|
|
# in theory in this particular case it would make sense
|
|
# to give both 'a' and 'b'
|
|
|
|
def test_cast_to_array_type(self):
|
|
p = ffi.new("int[4]", [-5])
|
|
q = ffi.cast("int[3]", p)
|
|
assert q[0] == -5
|
|
assert repr(q).startswith("<cdata 'int[3]' 0x")
|
|
|
|
def test_gc(self):
|
|
p = ffi.new("int *", 123)
|
|
seen = []
|
|
def destructor(p1):
|
|
assert p1 is p
|
|
assert p1[0] == 123
|
|
seen.append(1)
|
|
q = ffi.gc(p, destructor=destructor)
|
|
import gc; gc.collect()
|
|
assert seen == []
|
|
del q
|
|
import gc; gc.collect(); gc.collect(); gc.collect()
|
|
assert seen == [1]
|
|
|
|
def test_gc_2(self):
|
|
p = ffi.new("int *", 123)
|
|
seen = []
|
|
q1 = ffi.gc(p, lambda p: seen.append(1))
|
|
q2 = ffi.gc(q1, lambda p: seen.append(2))
|
|
import gc; gc.collect()
|
|
assert seen == []
|
|
del q1, q2
|
|
import gc; gc.collect(); gc.collect(); gc.collect(); gc.collect()
|
|
assert seen == [2, 1]
|
|
|
|
def test_gc_3(self):
|
|
p = ffi.new("int *", 123)
|
|
r = ffi.new("int *", 123)
|
|
seen = []
|
|
seen_r = []
|
|
q1 = ffi.gc(p, lambda p: seen.append(1))
|
|
s1 = ffi.gc(r, lambda r: seen_r.append(4))
|
|
q2 = ffi.gc(q1, lambda p: seen.append(2))
|
|
s2 = ffi.gc(s1, lambda r: seen_r.append(5))
|
|
q3 = ffi.gc(q2, lambda p: seen.append(3))
|
|
import gc; gc.collect()
|
|
assert seen == []
|
|
assert seen_r == []
|
|
del q1, q2, q3, s2, s1
|
|
import gc; gc.collect(); gc.collect(); gc.collect(); gc.collect()
|
|
assert seen == [3, 2, 1]
|
|
assert seen_r == [5, 4]
|
|
|
|
def test_gc_4(self):
|
|
p = ffi.new("int *", 123)
|
|
seen = []
|
|
q1 = ffi.gc(p, lambda p: seen.append(1))
|
|
q2 = ffi.gc(q1, lambda p: seen.append(2))
|
|
q3 = ffi.gc(q2, lambda p: seen.append(3))
|
|
import gc; gc.collect()
|
|
assert seen == []
|
|
del q1, q3 # q2 remains, and has a hard ref to q1
|
|
import gc; gc.collect(); gc.collect(); gc.collect()
|
|
assert seen == [3]
|
|
|
|
def test_release(self):
|
|
p = ffi.new("int[]", 123)
|
|
ffi.release(p)
|
|
# here, reading p[0] might give garbage or segfault...
|
|
ffi.release(p) # no effect
|
|
|
|
def test_release_new_allocator(self):
|
|
seen = []
|
|
def myalloc(size):
|
|
seen.append(size)
|
|
return ffi.new("char[]", b"X" * size)
|
|
def myfree(raw):
|
|
seen.append(raw)
|
|
alloc2 = ffi.new_allocator(alloc=myalloc, free=myfree)
|
|
p = alloc2("int[]", 15)
|
|
assert seen == [15 * 4]
|
|
ffi.release(p)
|
|
assert seen == [15 * 4, p]
|
|
ffi.release(p) # no effect
|
|
assert seen == [15 * 4, p]
|
|
#
|
|
del seen[:]
|
|
p = alloc2("struct ab *")
|
|
assert seen == [2 * 4]
|
|
ffi.release(p)
|
|
assert seen == [2 * 4, p]
|
|
ffi.release(p) # no effect
|
|
assert seen == [2 * 4, p]
|
|
|
|
def test_CData_CType(self):
|
|
assert isinstance(ffi.cast("int", 0), ffi.CData)
|
|
assert isinstance(ffi.new("int *"), ffi.CData)
|
|
assert not isinstance(ffi.typeof("int"), ffi.CData)
|
|
assert not isinstance(ffi.cast("int", 0), ffi.CType)
|
|
assert not isinstance(ffi.new("int *"), ffi.CType)
|
|
|
|
def test_CData_CType_2(self):
|
|
assert isinstance(ffi.typeof("int"), ffi.CType)
|
|
|
|
def test_bool(self):
|
|
assert int(ffi.cast("_Bool", 0.1)) == 1
|
|
assert int(ffi.cast("_Bool", -0.0)) == 0
|
|
assert int(ffi.cast("_Bool", b'\x02')) == 1
|
|
assert int(ffi.cast("_Bool", b'\x00')) == 0
|
|
assert int(ffi.cast("_Bool", b'\x80')) == 1
|
|
assert ffi.new("_Bool *", False)[0] == 0
|
|
assert ffi.new("_Bool *", 1)[0] == 1
|
|
py.test.raises(OverflowError, ffi.new, "_Bool *", 2)
|
|
py.test.raises(TypeError, ffi.string, ffi.cast("_Bool", 2))
|
|
|
|
def test_addressof(self):
|
|
p = ffi.new("struct ab *")
|
|
a = ffi.addressof(p[0])
|
|
assert repr(a).startswith("<cdata 'struct ab *' 0x")
|
|
assert a == p
|
|
py.test.raises(TypeError, ffi.addressof, p)
|
|
py.test.raises((AttributeError, TypeError), ffi.addressof, 5)
|
|
py.test.raises(TypeError, ffi.addressof, ffi.cast("int", 5))
|
|
|
|
def test_addressof_field(self):
|
|
p = ffi.new("struct ab *")
|
|
b = ffi.addressof(p[0], 'b')
|
|
assert repr(b).startswith("<cdata 'int *' 0x")
|
|
assert int(ffi.cast("uintptr_t", b)) == (
|
|
int(ffi.cast("uintptr_t", p)) + ffi.sizeof("int"))
|
|
assert b == ffi.addressof(p, 'b')
|
|
assert b != ffi.addressof(p, 'a')
|
|
|
|
def test_addressof_field_nested(self):
|
|
# struct nesting { struct abc d, e; };
|
|
p = ffi.new("struct nesting *")
|
|
py.test.raises(KeyError, ffi.addressof, p[0], 'e.b')
|
|
a = ffi.addressof(p[0], 'e', 'b')
|
|
assert int(ffi.cast("uintptr_t", a)) == (
|
|
int(ffi.cast("uintptr_t", p)) +
|
|
ffi.sizeof("struct abc") + ffi.sizeof("int"))
|
|
|
|
def test_addressof_anonymous_struct(self):
|
|
# typedef struct { int a; } anon_foo_t;
|
|
p = ffi.new("anon_foo_t *")
|
|
a = ffi.addressof(p[0])
|
|
assert a == p
|
|
|
|
def test_addressof_array(self):
|
|
p = ffi.new("int[52]")
|
|
p0 = ffi.addressof(p)
|
|
assert p0 == p
|
|
assert ffi.typeof(p0) is ffi.typeof("int(*)[52]")
|
|
py.test.raises(TypeError, ffi.addressof, p0)
|
|
#
|
|
p1 = ffi.addressof(p, 25)
|
|
assert ffi.typeof(p1) is ffi.typeof("int *")
|
|
assert (p1 - p) == 25
|
|
assert ffi.addressof(p, 0) == p
|
|
|
|
def test_addressof_pointer(self):
|
|
array = ffi.new("int[50]")
|
|
p = ffi.cast("int *", array)
|
|
py.test.raises(TypeError, ffi.addressof, p)
|
|
assert ffi.addressof(p, 0) == p
|
|
assert ffi.addressof(p, 25) == p + 25
|
|
assert ffi.typeof(ffi.addressof(p, 25)) == ffi.typeof(p)
|
|
#
|
|
array = ffi.new("struct ab[50]")
|
|
p = ffi.cast("int *", array)
|
|
py.test.raises(TypeError, ffi.addressof, p)
|
|
assert ffi.addressof(p, 0) == p
|
|
assert ffi.addressof(p, 25) == p + 25
|
|
assert ffi.typeof(ffi.addressof(p, 25)) == ffi.typeof(p)
|
|
|
|
def test_addressof_array_in_struct(self):
|
|
# struct abc50 { int a, b; int c[50]; };
|
|
p = ffi.new("struct abc50 *")
|
|
p1 = ffi.addressof(p, "c", 25)
|
|
assert ffi.typeof(p1) is ffi.typeof("int *")
|
|
assert p1 == ffi.cast("int *", p) + 27
|
|
assert ffi.addressof(p, "c") == ffi.cast("int *", p) + 2
|
|
assert ffi.addressof(p, "c", 0) == ffi.cast("int *", p) + 2
|
|
p2 = ffi.addressof(p, 1)
|
|
assert ffi.typeof(p2) is ffi.typeof("struct abc50 *")
|
|
assert p2 == p + 1
|
|
|
|
def test_multiple_independent_structs(self):
|
|
CDEF2 = "struct ab { int x; };"
|
|
ffi2 = cffi.FFI(); ffi2.cdef(CDEF2)
|
|
outputfilename = recompile(ffi2, "test_multiple_independent_structs",
|
|
CDEF2, tmpdir=str(udir))
|
|
module = imp.load_dynamic("test_multiple_independent_structs",
|
|
outputfilename)
|
|
ffi1 = module.ffi
|
|
foo1 = ffi1.new("struct ab *", [10])
|
|
foo2 = ffi .new("struct ab *", [20, 30])
|
|
assert foo1.x == 10
|
|
assert foo2.a == 20
|
|
assert foo2.b == 30
|
|
|
|
def test_include_struct_union_enum_typedef(self):
|
|
ffi1, CCODE = construction_params
|
|
ffi2 = cffi.FFI()
|
|
ffi2.include(ffi1)
|
|
outputfilename = recompile(ffi2,
|
|
"test_include_struct_union_enum_typedef",
|
|
CCODE, tmpdir=str(udir))
|
|
module = imp.load_dynamic("test_include_struct_union_enum_typedef",
|
|
outputfilename)
|
|
ffi2 = module.ffi
|
|
#
|
|
p = ffi2.new("struct nonpacked *", [b'A', -43141])
|
|
assert p.a == b'A'
|
|
assert p.b == -43141
|
|
#
|
|
p = ffi.new("union simple_u *", [-52525])
|
|
assert p.a == -52525
|
|
#
|
|
p = ffi.cast("enum foq", 2)
|
|
assert ffi.string(p) == "cffiCC0"
|
|
assert ffi2.sizeof("char[cffiCC0]") == 2
|
|
#
|
|
p = ffi.new("anon_foo_t *", [-52526])
|
|
assert p.a == -52526
|
|
p = ffi.new("named_foo_p", [-52527])
|
|
assert p.a == -52527
|
|
|
|
def test_struct_packed(self):
|
|
# struct nonpacked { char a; int b; };
|
|
# struct is_packed { char a; int b; } __attribute__((packed));
|
|
assert ffi.sizeof("struct nonpacked") == 8
|
|
assert ffi.sizeof("struct is_packed") == 5
|
|
assert ffi.alignof("struct nonpacked") == 4
|
|
assert ffi.alignof("struct is_packed") == 1
|
|
s = ffi.new("struct is_packed[2]")
|
|
s[0].b = 42623381
|
|
s[0].a = b'X'
|
|
s[1].b = -4892220
|
|
s[1].a = b'Y'
|
|
assert s[0].b == 42623381
|
|
assert s[0].a == b'X'
|
|
assert s[1].b == -4892220
|
|
assert s[1].a == b'Y'
|
|
|
|
def test_not_supported_bitfield_in_result(self):
|
|
# struct ints_and_bitfield { int a,b,c,d,e; int x:1; };
|
|
e = py.test.raises(NotImplementedError, ffi.callback,
|
|
"struct ints_and_bitfield foo(void)", lambda: 42)
|
|
assert str(e.value) == ("struct ints_and_bitfield(*)(): "
|
|
"callback with unsupported argument or return type or with '...'")
|
|
|
|
def test_inspecttype(self):
|
|
assert ffi.typeof("long").kind == "primitive"
|
|
assert ffi.typeof("long(*)(long, long**, ...)").cname == (
|
|
"long(*)(long, long * *, ...)")
|
|
assert ffi.typeof("long(*)(long, long**, ...)").ellipsis is True
|
|
|
|
def test_new_handle(self):
|
|
o = [2, 3, 4]
|
|
p = ffi.new_handle(o)
|
|
assert ffi.typeof(p) == ffi.typeof("void *")
|
|
assert ffi.from_handle(p) is o
|
|
assert ffi.from_handle(ffi.cast("char *", p)) is o
|
|
py.test.raises(RuntimeError, ffi.from_handle, ffi.NULL)
|
|
|
|
def test_struct_array_no_length(self):
|
|
# struct array_no_length { int x; int a[]; };
|
|
p = ffi.new("struct array_no_length *", [100, [200, 300, 400]])
|
|
assert p.x == 100
|
|
assert ffi.typeof(p.a) is ffi.typeof("int[]") # length available
|
|
assert p.a[0] == 200
|
|
assert p.a[1] == 300
|
|
assert p.a[2] == 400
|
|
assert len(p.a) == 3
|
|
assert list(p.a) == [200, 300, 400]
|
|
q = ffi.cast("struct array_no_length *", p)
|
|
assert ffi.typeof(q.a) is ffi.typeof("int *") # no length available
|
|
assert q.a[0] == 200
|
|
assert q.a[1] == 300
|
|
assert q.a[2] == 400
|
|
py.test.raises(TypeError, len, q.a)
|
|
py.test.raises(TypeError, list, q.a)
|
|
|
|
def test_all_primitives(self):
|
|
assert set(PRIMITIVE_TO_INDEX) == set([
|
|
"char",
|
|
"short",
|
|
"int",
|
|
"long",
|
|
"long long",
|
|
"signed char",
|
|
"unsigned char",
|
|
"unsigned short",
|
|
"unsigned int",
|
|
"unsigned long",
|
|
"unsigned long long",
|
|
"float",
|
|
"double",
|
|
"long double",
|
|
"wchar_t",
|
|
"char16_t",
|
|
"char32_t",
|
|
"_Bool",
|
|
"int8_t",
|
|
"uint8_t",
|
|
"int16_t",
|
|
"uint16_t",
|
|
"int32_t",
|
|
"uint32_t",
|
|
"int64_t",
|
|
"uint64_t",
|
|
"int_least8_t",
|
|
"uint_least8_t",
|
|
"int_least16_t",
|
|
"uint_least16_t",
|
|
"int_least32_t",
|
|
"uint_least32_t",
|
|
"int_least64_t",
|
|
"uint_least64_t",
|
|
"int_fast8_t",
|
|
"uint_fast8_t",
|
|
"int_fast16_t",
|
|
"uint_fast16_t",
|
|
"int_fast32_t",
|
|
"uint_fast32_t",
|
|
"int_fast64_t",
|
|
"uint_fast64_t",
|
|
"intptr_t",
|
|
"uintptr_t",
|
|
"intmax_t",
|
|
"uintmax_t",
|
|
"ptrdiff_t",
|
|
"size_t",
|
|
"ssize_t",
|
|
'float _Complex',
|
|
'double _Complex',
|
|
])
|
|
for name in PRIMITIVE_TO_INDEX:
|
|
x = ffi.sizeof(name)
|
|
assert 1 <= x <= 16
|
|
|
|
def test_emit_c_code(self):
|
|
ffi = cffi.FFI()
|
|
ffi.set_source("foobar", "??")
|
|
c_file = str(udir.join('test_emit_c_code'))
|
|
ffi.emit_c_code(c_file)
|
|
assert os.path.isfile(c_file)
|
|
|
|
def test_import_from_lib(self):
|
|
ffi2 = cffi.FFI()
|
|
ffi2.cdef("int myfunc(int); extern int myvar;\n#define MYFOO ...\n")
|
|
outputfilename = recompile(ffi2, "_test_import_from_lib",
|
|
"int myfunc(int x) { return x + 1; }\n"
|
|
"int myvar = -5;\n"
|
|
"#define MYFOO 42", tmpdir=str(udir))
|
|
imp.load_dynamic("_test_import_from_lib", outputfilename)
|
|
from _test_import_from_lib.lib import myfunc, myvar, MYFOO
|
|
assert MYFOO == 42
|
|
assert myfunc(43) == 44
|
|
assert myvar == -5 # but can't be changed, so not very useful
|
|
with pytest.raises(ImportError):
|
|
from _test_import_from_lib.lib import bar
|
|
d = {}
|
|
exec("from _test_import_from_lib.lib import *", d)
|
|
assert (set(key for key in d if not key.startswith('_')) ==
|
|
set(['myfunc', 'MYFOO']))
|
|
#
|
|
# also test "import *" on the module itself, which should be
|
|
# equivalent to "import ffi, lib"
|
|
d = {}
|
|
exec("from _test_import_from_lib import *", d)
|
|
assert (sorted([x for x in d.keys() if not x.startswith('__')]) ==
|
|
['ffi', 'lib'])
|
|
|
|
def test_char16_t(self):
|
|
x = ffi.new("char16_t[]", 5)
|
|
assert len(x) == 5 and ffi.sizeof(x) == 10
|
|
x[2] = u+'\u1324'
|
|
assert x[2] == u+'\u1324'
|
|
y = ffi.new("char16_t[]", u+'\u1234\u5678')
|
|
assert len(y) == 3
|
|
assert list(y) == [u+'\u1234', u+'\u5678', u+'\x00']
|
|
assert ffi.string(y) == u+'\u1234\u5678'
|
|
z = ffi.new("char16_t[]", u+'\U00012345')
|
|
assert len(z) == 3
|
|
assert list(z) == [u+'\ud808', u+'\udf45', u+'\x00']
|
|
assert ffi.string(z) == u+'\U00012345'
|
|
|
|
def test_char32_t(self):
|
|
x = ffi.new("char32_t[]", 5)
|
|
assert len(x) == 5 and ffi.sizeof(x) == 20
|
|
x[3] = u+'\U00013245'
|
|
assert x[3] == u+'\U00013245'
|
|
y = ffi.new("char32_t[]", u+'\u1234\u5678')
|
|
assert len(y) == 3
|
|
assert list(y) == [u+'\u1234', u+'\u5678', u+'\x00']
|
|
z = ffi.new("char32_t[]", u+'\U00012345')
|
|
assert len(z) == 2
|
|
assert list(z) == [u+'\U00012345', u+'\x00'] # maybe a 2-unichars strin
|
|
assert ffi.string(z) == u+'\U00012345'
|