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-rw-r--r--testing/cffi1/test_verify1.py2363
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diff --git a/testing/cffi1/test_verify1.py b/testing/cffi1/test_verify1.py
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+++ b/testing/cffi1/test_verify1.py
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+import os, sys, math, py
+from cffi import FFI, FFIError, VerificationError, VerificationMissing, model
+from cffi import CDefError
+from cffi import recompiler
+from testing.support import *
+from testing.support import _verify
+import _cffi_backend
+
+lib_m = ['m']
+if sys.platform == 'win32':
+ #there is a small chance this fails on Mingw via environ $CC
+ import distutils.ccompiler
+ if distutils.ccompiler.get_default_compiler() == 'msvc':
+ lib_m = ['msvcrt']
+ extra_compile_args = [] # no obvious -Werror equivalent on MSVC
+else:
+ if (sys.platform == 'darwin' and
+ [int(x) for x in os.uname()[2].split('.')] >= [11, 0, 0]):
+ # assume a standard clang or gcc
+ extra_compile_args = ['-Werror', '-Wall', '-Wextra', '-Wconversion']
+ # special things for clang
+ extra_compile_args.append('-Qunused-arguments')
+ else:
+ # assume a standard gcc
+ extra_compile_args = ['-Werror', '-Wall', '-Wextra', '-Wconversion']
+
+class FFI(FFI):
+ error = _cffi_backend.FFI.error
+ _extra_compile_args = extra_compile_args
+ _verify_counter = 0
+
+ def verify(self, preamble='', *args, **kwds):
+ # HACK to reuse the tests from ../cffi0/test_verify.py
+ FFI._verify_counter += 1
+ module_name = 'verify%d' % FFI._verify_counter
+ try:
+ del self._assigned_source
+ except AttributeError:
+ pass
+ self.set_source(module_name, preamble)
+ return _verify(self, module_name, preamble, *args,
+ extra_compile_args=self._extra_compile_args, **kwds)
+
+class FFI_warnings_not_error(FFI):
+ _extra_compile_args = []
+
+
+def test_missing_function(ffi=None):
+ # uses the FFI hacked above with '-Werror'
+ if ffi is None:
+ ffi = FFI()
+ ffi.cdef("void some_completely_unknown_function();")
+ try:
+ lib = ffi.verify()
+ except (VerificationError, OSError, ImportError):
+ pass # expected case: we get a VerificationError
+ else:
+ # but depending on compiler and loader details, maybe
+ # 'lib' could actually be imported but will fail if we
+ # actually try to call the unknown function... Hard
+ # to test anything more.
+ pass
+
+def test_missing_function_import_error():
+ # uses the original FFI that just gives a warning during compilation
+ test_missing_function(ffi=FFI_warnings_not_error())
+
+def test_simple_case():
+ ffi = FFI()
+ ffi.cdef("double sin(double x);")
+ lib = ffi.verify('#include <math.h>', libraries=lib_m)
+ assert lib.sin(1.23) == math.sin(1.23)
+
+def _Wconversion(cdef, source, **kargs):
+ if sys.platform in ('win32', 'darwin'):
+ py.test.skip("needs GCC")
+ ffi = FFI()
+ ffi.cdef(cdef)
+ py.test.raises(VerificationError, ffi.verify, source, **kargs)
+ extra_compile_args_orig = extra_compile_args[:]
+ extra_compile_args.remove('-Wconversion')
+ try:
+ lib = ffi.verify(source, **kargs)
+ finally:
+ extra_compile_args[:] = extra_compile_args_orig
+ return lib
+
+def test_Wconversion_unsigned():
+ _Wconversion("unsigned foo(void);",
+ "int foo(void) { return -1;}")
+
+def test_Wconversion_integer():
+ _Wconversion("short foo(void);",
+ "long long foo(void) { return 1<<sizeof(short);}")
+
+def test_Wconversion_floating():
+ lib = _Wconversion("float sin(double);",
+ "#include <math.h>", libraries=lib_m)
+ res = lib.sin(1.23)
+ assert res != math.sin(1.23) # not exact, because of double->float
+ assert abs(res - math.sin(1.23)) < 1E-5
+
+def test_Wconversion_float2int():
+ _Wconversion("int sinf(float);",
+ "#include <math.h>", libraries=lib_m)
+
+def test_Wconversion_double2int():
+ _Wconversion("int sin(double);",
+ "#include <math.h>", libraries=lib_m)
+
+def test_rounding_1():
+ ffi = FFI()
+ ffi.cdef("double sinf(float x);")
+ lib = ffi.verify('#include <math.h>', libraries=lib_m)
+ res = lib.sinf(1.23)
+ assert res != math.sin(1.23) # not exact, because of double->float
+ assert abs(res - math.sin(1.23)) < 1E-5
+
+def test_rounding_2():
+ ffi = FFI()
+ ffi.cdef("double sin(float x);")
+ lib = ffi.verify('#include <math.h>', libraries=lib_m)
+ res = lib.sin(1.23)
+ assert res != math.sin(1.23) # not exact, because of double->float
+ assert abs(res - math.sin(1.23)) < 1E-5
+
+def test_strlen_exact():
+ ffi = FFI()
+ ffi.cdef("size_t strlen(const char *s);")
+ lib = ffi.verify("#include <string.h>")
+ assert lib.strlen(b"hi there!") == 9
+
+def test_strlen_approximate():
+ lib = _Wconversion("int strlen(char *s);",
+ "#include <string.h>")
+ assert lib.strlen(b"hi there!") == 9
+
+def test_return_approximate():
+ for typename in ['short', 'int', 'long', 'long long']:
+ ffi = FFI()
+ ffi.cdef("%s foo(signed char x);" % typename)
+ lib = ffi.verify("signed char foo(signed char x) { return x;}")
+ assert lib.foo(-128) == -128
+ assert lib.foo(+127) == +127
+
+def test_strlen_array_of_char():
+ ffi = FFI()
+ ffi.cdef("size_t strlen(char[]);")
+ lib = ffi.verify("#include <string.h>")
+ assert lib.strlen(b"hello") == 5
+
+def test_longdouble():
+ ffi = FFI()
+ ffi.cdef("long double sinl(long double x);")
+ lib = ffi.verify('#include <math.h>', libraries=lib_m)
+ for input in [1.23,
+ ffi.cast("double", 1.23),
+ ffi.cast("long double", 1.23)]:
+ x = lib.sinl(input)
+ assert repr(x).startswith("<cdata 'long double'")
+ assert (float(x) - math.sin(1.23)) < 1E-10
+
+def test_longdouble_precision():
+ # Test that we don't loose any precision of 'long double' when
+ # passing through Python and CFFI.
+ ffi = FFI()
+ ffi.cdef("long double step1(long double x);")
+ SAME_SIZE = ffi.sizeof("long double") == ffi.sizeof("double")
+ lib = ffi.verify("""
+ long double step1(long double x)
+ {
+ return 4*x-x*x;
+ }
+ """)
+ def do(cast_to_double):
+ x = 0.9789
+ for i in range(10000):
+ x = lib.step1(x)
+ if cast_to_double:
+ x = float(x)
+ return float(x)
+
+ more_precise = do(False)
+ less_precise = do(True)
+ if SAME_SIZE:
+ assert more_precise == less_precise
+ else:
+ assert abs(more_precise - less_precise) > 0.1
+ # Check the particular results on Intel
+ import platform
+ if (platform.machine().startswith('i386') or
+ platform.machine().startswith('i486') or
+ platform.machine().startswith('i586') or
+ platform.machine().startswith('i686') or
+ platform.machine().startswith('x86')):
+ assert abs(more_precise - 0.656769) < 0.001
+ assert abs(less_precise - 3.99091) < 0.001
+ else:
+ py.test.skip("don't know the very exact precision of 'long double'")
+
+
+all_primitive_types = model.PrimitiveType.ALL_PRIMITIVE_TYPES
+if sys.platform == 'win32':
+ all_primitive_types = all_primitive_types.copy()
+ del all_primitive_types['ssize_t']
+all_integer_types = sorted(tp for tp in all_primitive_types
+ if all_primitive_types[tp] == 'i')
+all_float_types = sorted(tp for tp in all_primitive_types
+ if all_primitive_types[tp] == 'f')
+
+def all_signed_integer_types(ffi):
+ return [x for x in all_integer_types if int(ffi.cast(x, -1)) < 0]
+
+def all_unsigned_integer_types(ffi):
+ return [x for x in all_integer_types if int(ffi.cast(x, -1)) > 0]
+
+
+def test_primitive_category():
+ for typename in all_primitive_types:
+ tp = model.PrimitiveType(typename)
+ C = tp.is_char_type()
+ F = tp.is_float_type()
+ X = tp.is_complex_type()
+ I = tp.is_integer_type()
+ assert C == (typename in ('char', 'wchar_t', 'char16_t', 'char32_t'))
+ assert F == (typename in ('float', 'double', 'long double'))
+ assert X == (typename in ('float _Complex', 'double _Complex'))
+ assert I + F + C + X == 1 # one and only one of them is true
+
+def test_all_integer_and_float_types():
+ typenames = []
+ for typename in all_primitive_types:
+ if (all_primitive_types[typename] == 'c' or
+ all_primitive_types[typename] == 'j' or # complex
+ typename == '_Bool' or typename == 'long double'):
+ pass
+ else:
+ typenames.append(typename)
+ #
+ ffi = FFI()
+ ffi.cdef('\n'.join(["%s foo_%s(%s);" % (tp, tp.replace(' ', '_'), tp)
+ for tp in typenames]))
+ lib = ffi.verify('\n'.join(["%s foo_%s(%s x) { return (%s)(x+1); }" %
+ (tp, tp.replace(' ', '_'), tp, tp)
+ for tp in typenames]))
+ for typename in typenames:
+ foo = getattr(lib, 'foo_%s' % typename.replace(' ', '_'))
+ assert foo(42) == 43
+ if sys.version < '3':
+ assert foo(long(44)) == 45
+ assert foo(ffi.cast(typename, 46)) == 47
+ py.test.raises(TypeError, foo, ffi.NULL)
+ #
+ # check for overflow cases
+ if all_primitive_types[typename] == 'f':
+ continue
+ for value in [-2**80, -2**40, -2**20, -2**10, -2**5, -1,
+ 2**5, 2**10, 2**20, 2**40, 2**80]:
+ overflows = int(ffi.cast(typename, value)) != value
+ if overflows:
+ py.test.raises(OverflowError, foo, value)
+ else:
+ assert foo(value) == value + 1
+
+def test_var_signed_integer_types():
+ ffi = FFI()
+ lst = all_signed_integer_types(ffi)
+ csource = "\n".join(["%s somevar_%s;" % (tp, tp.replace(' ', '_'))
+ for tp in lst])
+ ffi.cdef(csource)
+ lib = ffi.verify(csource)
+ for tp in lst:
+ varname = 'somevar_%s' % tp.replace(' ', '_')
+ sz = ffi.sizeof(tp)
+ max = (1 << (8*sz-1)) - 1
+ min = -(1 << (8*sz-1))
+ setattr(lib, varname, max)
+ assert getattr(lib, varname) == max
+ setattr(lib, varname, min)
+ assert getattr(lib, varname) == min
+ py.test.raises(OverflowError, setattr, lib, varname, max+1)
+ py.test.raises(OverflowError, setattr, lib, varname, min-1)
+
+def test_var_unsigned_integer_types():
+ ffi = FFI()
+ lst = all_unsigned_integer_types(ffi)
+ csource = "\n".join(["%s somevar_%s;" % (tp, tp.replace(' ', '_'))
+ for tp in lst])
+ ffi.cdef(csource)
+ lib = ffi.verify(csource)
+ for tp in lst:
+ varname = 'somevar_%s' % tp.replace(' ', '_')
+ sz = ffi.sizeof(tp)
+ if tp != '_Bool':
+ max = (1 << (8*sz)) - 1
+ else:
+ max = 1
+ setattr(lib, varname, max)
+ assert getattr(lib, varname) == max
+ setattr(lib, varname, 0)
+ assert getattr(lib, varname) == 0
+ py.test.raises(OverflowError, setattr, lib, varname, max+1)
+ py.test.raises(OverflowError, setattr, lib, varname, -1)
+
+def test_fn_signed_integer_types():
+ ffi = FFI()
+ lst = all_signed_integer_types(ffi)
+ cdefsrc = "\n".join(["%s somefn_%s(%s);" % (tp, tp.replace(' ', '_'), tp)
+ for tp in lst])
+ ffi.cdef(cdefsrc)
+ verifysrc = "\n".join(["%s somefn_%s(%s x) { return x; }" %
+ (tp, tp.replace(' ', '_'), tp) for tp in lst])
+ lib = ffi.verify(verifysrc)
+ for tp in lst:
+ fnname = 'somefn_%s' % tp.replace(' ', '_')
+ sz = ffi.sizeof(tp)
+ max = (1 << (8*sz-1)) - 1
+ min = -(1 << (8*sz-1))
+ fn = getattr(lib, fnname)
+ assert fn(max) == max
+ assert fn(min) == min
+ py.test.raises(OverflowError, fn, max + 1)
+ py.test.raises(OverflowError, fn, min - 1)
+
+def test_fn_unsigned_integer_types():
+ ffi = FFI()
+ lst = all_unsigned_integer_types(ffi)
+ cdefsrc = "\n".join(["%s somefn_%s(%s);" % (tp, tp.replace(' ', '_'), tp)
+ for tp in lst])
+ ffi.cdef(cdefsrc)
+ verifysrc = "\n".join(["%s somefn_%s(%s x) { return x; }" %
+ (tp, tp.replace(' ', '_'), tp) for tp in lst])
+ lib = ffi.verify(verifysrc)
+ for tp in lst:
+ fnname = 'somefn_%s' % tp.replace(' ', '_')
+ sz = ffi.sizeof(tp)
+ if tp != '_Bool':
+ max = (1 << (8*sz)) - 1
+ else:
+ max = 1
+ fn = getattr(lib, fnname)
+ assert fn(max) == max
+ assert fn(0) == 0
+ py.test.raises(OverflowError, fn, max + 1)
+ py.test.raises(OverflowError, fn, -1)
+
+def test_char_type():
+ ffi = FFI()
+ ffi.cdef("char foo(char);")
+ lib = ffi.verify("char foo(char x) { return ++x; }")
+ assert lib.foo(b"A") == b"B"
+ py.test.raises(TypeError, lib.foo, b"bar")
+ py.test.raises(TypeError, lib.foo, "bar")
+
+def test_wchar_type():
+ ffi = FFI()
+ if ffi.sizeof('wchar_t') == 2:
+ uniexample1 = u+'\u1234'
+ uniexample2 = u+'\u1235'
+ else:
+ uniexample1 = u+'\U00012345'
+ uniexample2 = u+'\U00012346'
+ #
+ ffi.cdef("wchar_t foo(wchar_t);")
+ lib = ffi.verify("wchar_t foo(wchar_t x) { return x+1; }")
+ assert lib.foo(uniexample1) == uniexample2
+
+def test_no_argument():
+ ffi = FFI()
+ ffi.cdef("int foo(void);")
+ lib = ffi.verify("int foo(void) { return 42; }")
+ assert lib.foo() == 42
+
+def test_two_arguments():
+ ffi = FFI()
+ ffi.cdef("int foo(int, int);")
+ lib = ffi.verify("int foo(int a, int b) { return a - b; }")
+ assert lib.foo(40, -2) == 42
+
+def test_macro():
+ ffi = FFI()
+ ffi.cdef("int foo(int, int);")
+ lib = ffi.verify("#define foo(a, b) ((a) * (b))")
+ assert lib.foo(-6, -7) == 42
+
+def test_ptr():
+ ffi = FFI()
+ ffi.cdef("int *foo(int *);")
+ lib = ffi.verify("int *foo(int *a) { return a; }")
+ assert lib.foo(ffi.NULL) == ffi.NULL
+ p = ffi.new("int *", 42)
+ q = ffi.new("int *", 42)
+ assert lib.foo(p) == p
+ assert lib.foo(q) != p
+
+def test_bogus_ptr():
+ ffi = FFI()
+ ffi.cdef("int *foo(int *);")
+ lib = ffi.verify("int *foo(int *a) { return a; }")
+ py.test.raises(TypeError, lib.foo, ffi.new("short *", 42))
+
+
+def test_verify_typedefs():
+ py.test.skip("ignored so far")
+ types = ['signed char', 'unsigned char', 'int', 'long']
+ for cdefed in types:
+ for real in types:
+ ffi = FFI()
+ ffi.cdef("typedef %s foo_t;" % cdefed)
+ if cdefed == real:
+ ffi.verify("typedef %s foo_t;" % real)
+ else:
+ py.test.raises(VerificationError, ffi.verify,
+ "typedef %s foo_t;" % real)
+
+def test_nondecl_struct():
+ ffi = FFI()
+ ffi.cdef("typedef struct foo_s foo_t; int bar(foo_t *);")
+ lib = ffi.verify("typedef struct foo_s foo_t;\n"
+ "int bar(foo_t *f) { (void)f; return 42; }\n")
+ assert lib.bar(ffi.NULL) == 42
+
+def test_ffi_full_struct():
+ def check(verified_code):
+ ffi = FFI()
+ ffi.cdef("struct foo_s { char x; int y; long *z; };")
+ ffi.verify(verified_code)
+ ffi.new("struct foo_s *", {})
+
+ check("struct foo_s { char x; int y; long *z; };")
+ #
+ if sys.platform != 'win32': # XXX fixme: only gives warnings
+ py.test.raises(VerificationError, check,
+ "struct foo_s { char x; int y; int *z; };")
+ #
+ py.test.raises(VerificationError, check,
+ "struct foo_s { int y; long *z; };") # cdef'ed field x is missing
+ #
+ e = py.test.raises(FFI.error, check,
+ "struct foo_s { int y; char x; long *z; };")
+ assert str(e.value).startswith(
+ "struct foo_s: wrong offset for field 'x'"
+ " (cdef says 0, but C compiler says 4)")
+ #
+ e = py.test.raises(FFI.error, check,
+ "struct foo_s { char x; int y; long *z; char extra; };")
+ assert str(e.value).startswith(
+ "struct foo_s: wrong total size"
+ " (cdef says %d, but C compiler says %d)" % (
+ 8 + FFI().sizeof('long *'),
+ 8 + FFI().sizeof('long *') * 2))
+ #
+ # a corner case that we cannot really detect, but where it has no
+ # bad consequences: the size is the same, but there is an extra field
+ # that replaces what is just padding in our declaration above
+ check("struct foo_s { char x, extra; int y; long *z; };")
+ #
+ e = py.test.raises(FFI.error, check,
+ "struct foo_s { char x; short pad; short y; long *z; };")
+ assert str(e.value).startswith(
+ "struct foo_s: wrong size for field 'y'"
+ " (cdef says 4, but C compiler says 2)")
+
+def test_ffi_nonfull_struct():
+ ffi = FFI()
+ ffi.cdef("""
+ struct foo_s {
+ int x;
+ ...;
+ };
+ """)
+ py.test.raises(VerificationMissing, ffi.sizeof, 'struct foo_s')
+ py.test.raises(VerificationMissing, ffi.offsetof, 'struct foo_s', 'x')
+ py.test.raises(VerificationMissing, ffi.new, 'struct foo_s *')
+ ffi.verify("""
+ struct foo_s {
+ int a, b, x, c, d, e;
+ };
+ """)
+ assert ffi.sizeof('struct foo_s') == 6 * ffi.sizeof('int')
+ assert ffi.offsetof('struct foo_s', 'x') == 2 * ffi.sizeof('int')
+
+def test_ffi_nonfull_alignment():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { char x; ...; };")
+ ffi.verify("struct foo_s { int a, b; char x; };")
+ assert ffi.sizeof('struct foo_s') == 3 * ffi.sizeof('int')
+ assert ffi.alignof('struct foo_s') == ffi.sizeof('int')
+
+def _check_field_match(typename, real, expect_mismatch):
+ ffi = FFI()
+ testing_by_size = (expect_mismatch == 'by_size')
+ if testing_by_size:
+ expect_mismatch = ffi.sizeof(typename) != ffi.sizeof(real)
+ ffi.cdef("struct foo_s { %s x; ...; };" % typename)
+ try:
+ ffi.verify("struct foo_s { %s x; };" % real)
+ ffi.new("struct foo_s *", []) # because some mismatches show up lazily
+ except (VerificationError, ffi.error):
+ if not expect_mismatch:
+ if testing_by_size and typename != real:
+ print("ignoring mismatch between %s* and %s* even though "
+ "they have the same size" % (typename, real))
+ return
+ raise AssertionError("unexpected mismatch: %s should be accepted "
+ "as equal to %s" % (typename, real))
+ else:
+ if expect_mismatch:
+ raise AssertionError("mismatch not detected: "
+ "%s != %s" % (typename, real))
+
+def test_struct_bad_sized_integer():
+ for typename in ['int8_t', 'int16_t', 'int32_t', 'int64_t']:
+ for real in ['int8_t', 'int16_t', 'int32_t', 'int64_t']:
+ _check_field_match(typename, real, "by_size")
+
+def test_struct_bad_sized_float():
+ for typename in all_float_types:
+ for real in all_float_types:
+ _check_field_match(typename, real, "by_size")
+
+def test_struct_signedness_ignored():
+ _check_field_match("int", "unsigned int", expect_mismatch=False)
+ _check_field_match("unsigned short", "signed short", expect_mismatch=False)
+
+def test_struct_float_vs_int():
+ if sys.platform == 'win32':
+ py.test.skip("XXX fixme: only gives warnings")
+ ffi = FFI()
+ for typename in all_signed_integer_types(ffi):
+ for real in all_float_types:
+ _check_field_match(typename, real, expect_mismatch=True)
+ for typename in all_float_types:
+ for real in all_signed_integer_types(ffi):
+ _check_field_match(typename, real, expect_mismatch=True)
+
+def test_struct_array_field():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int a[17]; ...; };")
+ ffi.verify("struct foo_s { int x; int a[17]; int y; };")
+ assert ffi.sizeof('struct foo_s') == 19 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *")
+ assert ffi.sizeof(s.a) == 17 * ffi.sizeof('int')
+
+def test_struct_array_no_length():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int a[]; int y; ...; };\n"
+ "int bar(struct foo_s *);\n")
+ lib = ffi.verify("struct foo_s { int x; int a[17]; int y; };\n"
+ "int bar(struct foo_s *f) { return f->a[14]; }\n")
+ assert ffi.sizeof('struct foo_s') == 19 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *")
+ assert ffi.typeof(s.a) is ffi.typeof('int[]') # implicit max length
+ assert len(s.a) == 18 # max length, computed from the size and start offset
+ s.a[14] = 4242
+ assert lib.bar(s) == 4242
+ # with no declared length, out-of-bound accesses are not detected
+ s.a[17] = -521
+ assert s.y == s.a[17] == -521
+ #
+ s = ffi.new("struct foo_s *", {'a': list(range(17))})
+ assert s.a[16] == 16
+ # overflows at construction time not detected either
+ s = ffi.new("struct foo_s *", {'a': list(range(18))})
+ assert s.y == s.a[17] == 17
+
+def test_struct_array_guess_length():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int a[...]; };")
+ ffi.verify("struct foo_s { int x; int a[17]; int y; };")
+ assert ffi.sizeof('struct foo_s') == 19 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *")
+ assert ffi.sizeof(s.a) == 17 * ffi.sizeof('int')
+ py.test.raises(IndexError, 's.a[17]')
+
+def test_struct_array_c99_1():
+ if sys.platform == 'win32':
+ py.test.skip("requires C99")
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int x; int a[]; };")
+ ffi.verify("struct foo_s { int x; int a[]; };")
+ assert ffi.sizeof('struct foo_s') == 1 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *", [424242, 4])
+ assert ffi.sizeof(ffi.typeof(s[0])) == 1 * ffi.sizeof('int')
+ assert ffi.sizeof(s[0]) == 5 * ffi.sizeof('int')
+ # ^^^ explanation: if you write in C: "char x[5];", then
+ # "sizeof(x)" will evaluate to 5. The behavior above is
+ # a generalization of that to "struct foo_s[len(a)=5] x;"
+ # if you could do that in C.
+ assert s.a[3] == 0
+ s = ffi.new("struct foo_s *", [424242, [-40, -30, -20, -10]])
+ assert ffi.sizeof(s[0]) == 5 * ffi.sizeof('int')
+ assert s.a[3] == -10
+ s = ffi.new("struct foo_s *")
+ assert ffi.sizeof(s[0]) == 1 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *", [424242])
+ assert ffi.sizeof(s[0]) == 1 * ffi.sizeof('int')
+
+def test_struct_array_c99_2():
+ if sys.platform == 'win32':
+ py.test.skip("requires C99")
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int x; int a[]; ...; };")
+ ffi.verify("struct foo_s { int x, y; int a[]; };")
+ assert ffi.sizeof('struct foo_s') == 2 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *", [424242, 4])
+ assert ffi.sizeof(s[0]) == 6 * ffi.sizeof('int')
+ assert s.a[3] == 0
+ s = ffi.new("struct foo_s *", [424242, [-40, -30, -20, -10]])
+ assert ffi.sizeof(s[0]) == 6 * ffi.sizeof('int')
+ assert s.a[3] == -10
+ s = ffi.new("struct foo_s *")
+ assert ffi.sizeof(s[0]) == 2 * ffi.sizeof('int')
+ s = ffi.new("struct foo_s *", [424242])
+ assert ffi.sizeof(s[0]) == 2 * ffi.sizeof('int')
+
+def test_struct_ptr_to_array_field():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int (*a)[17]; ...; }; struct bar_s { ...; };")
+ ffi.verify("struct foo_s { int x; int (*a)[17]; int y; };\n"
+ "struct bar_s { int x; int *a; int y; };")
+ assert ffi.sizeof('struct foo_s') == ffi.sizeof("struct bar_s")
+ s = ffi.new("struct foo_s *")
+ assert ffi.sizeof(s.a) == ffi.sizeof('int(*)[17]') == ffi.sizeof("int *")
+
+def test_struct_with_bitfield_exact():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int a:2, b:3; };")
+ ffi.verify("struct foo_s { int a:2, b:3; };")
+ s = ffi.new("struct foo_s *")
+ s.b = 3
+ py.test.raises(OverflowError, "s.b = 4")
+ assert s.b == 3
+
+def test_struct_with_bitfield_enum():
+ ffi = FFI()
+ code = """
+ typedef enum { AA, BB, CC } foo_e;
+ typedef struct { foo_e f:2; } foo_s;
+ """
+ ffi.cdef(code)
+ ffi.verify(code)
+ s = ffi.new("foo_s *")
+ s.f = 1
+ assert s.f == 1
+ if int(ffi.cast("foo_e", -1)) < 0:
+ two = -2
+ else:
+ two = 2
+ s.f = two
+ assert s.f == two
+
+def test_unsupported_struct_with_bitfield_ellipsis():
+ ffi = FFI()
+ py.test.raises(NotImplementedError, ffi.cdef,
+ "struct foo_s { int a:2, b:3; ...; };")
+
+def test_global_constants():
+ ffi = FFI()
+ # use 'static const int', as generally documented, although in this
+ # case the 'static' is completely ignored.
+ ffi.cdef("static const int AA, BB, CC, DD;")
+ lib = ffi.verify("#define AA 42\n"
+ "#define BB (-43) // blah\n"
+ "#define CC (22*2) /* foobar */\n"
+ "#define DD ((unsigned int)142) /* foo\nbar */\n")
+ assert lib.AA == 42
+ assert lib.BB == -43
+ assert lib.CC == 44
+ assert lib.DD == 142
+
+def test_global_const_int_size():
+ # integer constants: ignore the declared type, always just use the value
+ for value in [-2**63, -2**31, -2**15,
+ 2**15-1, 2**15, 2**31-1, 2**31, 2**32-1, 2**32,
+ 2**63-1, 2**63, 2**64-1]:
+ ffi = FFI()
+ if value == int(ffi.cast("long long", value)):
+ if value < 0:
+ vstr = '(-%dLL-1)' % (~value,)
+ else:
+ vstr = '%dLL' % value
+ elif value == int(ffi.cast("unsigned long long", value)):
+ vstr = '%dULL' % value
+ else:
+ raise AssertionError(value)
+ ffi.cdef("static const unsigned short AA;")
+ lib = ffi.verify("#define AA %s\n" % vstr)
+ assert lib.AA == value
+ assert type(lib.AA) is type(int(lib.AA))
+
+def test_global_constants_non_int():
+ ffi = FFI()
+ ffi.cdef("static char *const PP;")
+ lib = ffi.verify('static char *const PP = "testing!";\n')
+ assert ffi.typeof(lib.PP) == ffi.typeof("char *")
+ assert ffi.string(lib.PP) == b"testing!"
+
+def test_nonfull_enum():
+ ffi = FFI()
+ ffi.cdef("enum ee { EE1, EE2, EE3, ... \n \t };")
+ py.test.raises(VerificationMissing, ffi.cast, 'enum ee', 'EE2')
+ ffi.verify("enum ee { EE1=10, EE2, EE3=-10, EE4 };")
+ assert ffi.string(ffi.cast('enum ee', 11)) == "EE2"
+ assert ffi.string(ffi.cast('enum ee', -10)) == "EE3"
+ #
+ assert ffi.typeof("enum ee").relements == {'EE1': 10, 'EE2': 11, 'EE3': -10}
+ assert ffi.typeof("enum ee").elements == {10: 'EE1', 11: 'EE2', -10: 'EE3'}
+
+def test_full_enum():
+ ffi = FFI()
+ ffi.cdef("enum ee { EE1, EE2, EE3 };")
+ lib = ffi.verify("enum ee { EE1, EE2, EE3 };")
+ assert [lib.EE1, lib.EE2, lib.EE3] == [0, 1, 2]
+
+def test_enum_usage():
+ ffi = FFI()
+ ffi.cdef("enum ee { EE1,EE2 }; typedef struct { enum ee x; } *sp;")
+ lib = ffi.verify("enum ee { EE1,EE2 }; typedef struct { enum ee x; } *sp;")
+ assert lib.EE2 == 1
+ s = ffi.new("sp", [lib.EE2])
+ assert s.x == 1
+ s.x = 17
+ assert s.x == 17
+
+def test_anonymous_enum():
+ ffi = FFI()
+ ffi.cdef("enum { EE1 }; enum { EE2, EE3 };")
+ lib = ffi.verify("enum { EE1 }; enum { EE2, EE3 };")
+ assert lib.EE1 == 0
+ assert lib.EE2 == 0
+ assert lib.EE3 == 1
+
+def test_nonfull_anonymous_enum():
+ ffi = FFI()
+ ffi.cdef("enum { EE1, ... }; enum { EE3, ... };")
+ lib = ffi.verify("enum { EE2, EE1 }; enum { EE3 };")
+ assert lib.EE1 == 1
+ assert lib.EE3 == 0
+
+def test_nonfull_enum_syntax2():
+ ffi = FFI()
+ ffi.cdef("enum ee { EE1, EE2=\t..., EE3 };")
+ py.test.raises(VerificationMissing, ffi.cast, 'enum ee', 'EE1')
+ ffi.verify("enum ee { EE1=10, EE2, EE3=-10, EE4 };")
+ assert ffi.string(ffi.cast('enum ee', 11)) == 'EE2'
+ assert ffi.string(ffi.cast('enum ee', -10)) == 'EE3'
+ #
+ ffi = FFI()
+ ffi.cdef("enum ee { EE1, EE2=\t... };")
+ py.test.raises(VerificationMissing, ffi.cast, 'enum ee', 'EE1')
+ ffi.verify("enum ee { EE1=10, EE2, EE3=-10, EE4 };")
+ assert ffi.string(ffi.cast('enum ee', 11)) == 'EE2'
+ #
+ ffi = FFI()
+ ffi.cdef("enum ee2 { EE4=..., EE5=..., ... };")
+ ffi.verify("enum ee2 { EE4=-1234-5, EE5 }; ")
+ assert ffi.string(ffi.cast('enum ee2', -1239)) == 'EE4'
+ assert ffi.string(ffi.cast('enum ee2', -1238)) == 'EE5'
+
+def test_get_set_errno():
+ ffi = FFI()
+ ffi.cdef("int foo(int);")
+ lib = ffi.verify("""
+ static int foo(int x)
+ {
+ errno += 1;
+ return x * 7;
+ }
+ """)
+ ffi.errno = 15
+ assert lib.foo(6) == 42
+ assert ffi.errno == 16
+
+def test_define_int():
+ ffi = FFI()
+ ffi.cdef("#define FOO ...\n"
+ "\t#\tdefine\tBAR\t...\t\n"
+ "#define BAZ ...\n")
+ lib = ffi.verify("#define FOO 42\n"
+ "#define BAR (-44)\n"
+ "#define BAZ 0xffffffffffffffffULL\n")
+ assert lib.FOO == 42
+ assert lib.BAR == -44
+ assert lib.BAZ == 0xffffffffffffffff
+
+def test_access_variable():
+ ffi = FFI()
+ ffi.cdef("int foo(void);\n"
+ "int somenumber;")
+ lib = ffi.verify("""
+ static int somenumber = 2;
+ static int foo(void) {
+ return somenumber * 7;
+ }
+ """)
+ assert lib.somenumber == 2
+ assert lib.foo() == 14
+ lib.somenumber = -6
+ assert lib.foo() == -42
+ assert lib.somenumber == -6
+ lib.somenumber = 2 # reset for the next run, if any
+
+def test_access_address_of_variable():
+ # access the address of 'somenumber': need a trick
+ ffi = FFI()
+ ffi.cdef("int somenumber; static int *const somenumberptr;")
+ lib = ffi.verify("""
+ static int somenumber = 2;
+ #define somenumberptr (&somenumber)
+ """)
+ assert lib.somenumber == 2
+ lib.somenumberptr[0] = 42
+ assert lib.somenumber == 42
+ lib.somenumber = 2 # reset for the next run, if any
+
+def test_access_array_variable(length=5):
+ ffi = FFI()
+ ffi.cdef("int foo(int);\n"
+ "int somenumber[%s];" % (length,))
+ lib = ffi.verify("""
+ static int somenumber[] = {2, 2, 3, 4, 5};
+ static int foo(int i) {
+ return somenumber[i] * 7;
+ }
+ """)
+ if length == '':
+ # a global variable of an unknown array length is implicitly
+ # transformed into a global pointer variable, because we can only
+ # work with array instances whose length we know. using a pointer
+ # instead of an array gives the correct effects.
+ assert repr(lib.somenumber).startswith("<cdata 'int *' 0x")
+ py.test.raises(TypeError, len, lib.somenumber)
+ else:
+ assert repr(lib.somenumber).startswith("<cdata 'int[%s]' 0x" % length)
+ assert len(lib.somenumber) == 5
+ assert lib.somenumber[3] == 4
+ assert lib.foo(3) == 28
+ lib.somenumber[3] = -6
+ assert lib.foo(3) == -42
+ assert lib.somenumber[3] == -6
+ assert lib.somenumber[4] == 5
+ lib.somenumber[3] = 4 # reset for the next run, if any
+
+def test_access_array_variable_length_hidden():
+ test_access_array_variable(length='')
+
+def test_access_struct_variable():
+ ffi = FFI()
+ ffi.cdef("struct foo { int x; ...; };\n"
+ "int foo(int);\n"
+ "struct foo stuff;")
+ lib = ffi.verify("""
+ struct foo { int x, y, z; };
+ static struct foo stuff = {2, 5, 8};
+ static int foo(int i) {
+ switch (i) {
+ case 0: return stuff.x * 7;
+ case 1: return stuff.y * 7;
+ case 2: return stuff.z * 7;
+ }
+ return -1;
+ }
+ """)
+ assert lib.stuff.x == 2
+ assert lib.foo(0) == 14
+ assert lib.foo(1) == 35
+ assert lib.foo(2) == 56
+ lib.stuff.x = -6
+ assert lib.foo(0) == -42
+ assert lib.foo(1) == 35
+ lib.stuff.x = 2 # reset for the next run, if any
+
+def test_access_callback():
+ ffi = FFI()
+ ffi.cdef("int (*cb)(int);\n"
+ "int foo(int);\n"
+ "void reset_cb(void);")
+ lib = ffi.verify("""
+ static int g(int x) { return x * 7; }
+ static int (*cb)(int);
+ static int foo(int i) { return cb(i) - 1; }
+ static void reset_cb(void) { cb = g; }
+ """)
+ lib.reset_cb()
+ assert lib.foo(6) == 41
+ my_callback = ffi.callback("int(*)(int)", lambda n: n * 222)
+ lib.cb = my_callback
+ assert lib.foo(4) == 887
+
+def test_access_callback_function_typedef():
+ ffi = FFI()
+ ffi.cdef("typedef int mycallback_t(int);\n"
+ "mycallback_t *cb;\n"
+ "int foo(int);\n"
+ "void reset_cb(void);")
+ lib = ffi.verify("""
+ static int g(int x) { return x * 7; }
+ static int (*cb)(int);
+ static int foo(int i) { return cb(i) - 1; }
+ static void reset_cb(void) { cb = g; }
+ """)
+ lib.reset_cb()
+ assert lib.foo(6) == 41
+ my_callback = ffi.callback("int(*)(int)", lambda n: n * 222)
+ lib.cb = my_callback
+ assert lib.foo(4) == 887
+
+def test_call_with_struct_ptr():
+ ffi = FFI()
+ ffi.cdef("typedef struct { int x; ...; } foo_t; int foo(foo_t *);")
+ lib = ffi.verify("""
+ typedef struct { int y, x; } foo_t;
+ static int foo(foo_t *f) { return f->x * 7; }
+ """)
+ f = ffi.new("foo_t *")
+ f.x = 6
+ assert lib.foo(f) == 42
+
+def test_unknown_type():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef ... token_t;
+ int foo(token_t *);
+ #define TOKEN_SIZE ...
+ """)
+ lib = ffi.verify("""
+ typedef float token_t;
+ static int foo(token_t *tk) {
+ if (!tk)
+ return -42;
+ *tk += 1.601f;
+ return (int)*tk;
+ }
+ #define TOKEN_SIZE sizeof(token_t)
+ """)
+ # we cannot let ffi.new("token_t *") work, because we don't know ahead of
+ # time if it's ok to ask 'sizeof(token_t)' in the C code or not.
+ # See test_unknown_type_2. Workaround.
+ tkmem = ffi.new("char[]", lib.TOKEN_SIZE) # zero-initialized
+ tk = ffi.cast("token_t *", tkmem)
+ results = [lib.foo(tk) for i in range(6)]
+ assert results == [1, 3, 4, 6, 8, 9]
+ assert lib.foo(ffi.NULL) == -42
+
+def test_unknown_type_2():
+ ffi = FFI()
+ ffi.cdef("typedef ... token_t;")
+ lib = ffi.verify("typedef struct token_s token_t;")
+ # assert did not crash, even though 'sizeof(token_t)' is not valid in C.
+
+def test_unknown_type_3():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef ... *token_p;
+ token_p foo(token_p);
+ """)
+ lib = ffi.verify("""
+ typedef struct _token_s *token_p;
+ token_p foo(token_p arg) {
+ if (arg)
+ return (token_p)0x12347;
+ else
+ return (token_p)0x12345;
+ }
+ """)
+ p = lib.foo(ffi.NULL)
+ assert int(ffi.cast("intptr_t", p)) == 0x12345
+ q = lib.foo(p)
+ assert int(ffi.cast("intptr_t", q)) == 0x12347
+
+def test_varargs():
+ ffi = FFI()
+ ffi.cdef("int foo(int x, ...);")
+ lib = ffi.verify("""
+ int foo(int x, ...) {
+ va_list vargs;
+ va_start(vargs, x);
+ x -= va_arg(vargs, int);
+ x -= va_arg(vargs, int);
+ va_end(vargs);
+ return x;
+ }
+ """)
+ assert lib.foo(50, ffi.cast("int", 5), ffi.cast("int", 3)) == 42
+
+def test_varargs_exact():
+ if sys.platform == 'win32':
+ py.test.skip("XXX fixme: only gives warnings")
+ ffi = FFI()
+ ffi.cdef("int foo(int x, ...);")
+ py.test.raises(VerificationError, ffi.verify, """
+ int foo(long long x, ...) {
+ return x;
+ }
+ """)
+
+def test_varargs_struct():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { char a; int b; }; int foo(int x, ...);")
+ lib = ffi.verify("""
+ struct foo_s {
+ char a; int b;
+ };
+ int foo(int x, ...) {
+ va_list vargs;
+ struct foo_s s;
+ va_start(vargs, x);
+ s = va_arg(vargs, struct foo_s);
+ va_end(vargs);
+ return s.a - s.b;
+ }
+ """)
+ s = ffi.new("struct foo_s *", [b'B', 1])
+ assert lib.foo(50, s[0]) == ord('A')
+
+def test_autofilled_struct_as_argument():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { long a; double b; ...; };\n"
+ "int foo(struct foo_s);")
+ lib = ffi.verify("""
+ struct foo_s {
+ double b;
+ long a;
+ };
+ int foo(struct foo_s s) {
+ return (int)s.a - (int)s.b;
+ }
+ """)
+ s = ffi.new("struct foo_s *", [100, 1])
+ assert lib.foo(s[0]) == 99
+ assert lib.foo([100, 1]) == 99
+
+def test_autofilled_struct_as_argument_dynamic():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { long a; ...; };\n"
+ "int (*foo)(struct foo_s);")
+ lib = ffi.verify("""
+ struct foo_s {
+ double b;
+ long a;
+ };
+ int foo1(struct foo_s s) {
+ return (int)s.a - (int)s.b;
+ }
+ int (*foo)(struct foo_s s) = &foo1;
+ """)
+ e = py.test.raises(NotImplementedError, lib.foo, "?")
+ msg = ("ctype 'struct foo_s' not supported as argument. It is a struct "
+ 'declared with "...;", but the C calling convention may depend on '
+ "the missing fields; or, it contains anonymous struct/unions. "
+ "Such structs are only supported as argument "
+ "if the function is 'API mode' and non-variadic (i.e. declared "
+ "inside ffibuilder.cdef()+ffibuilder.set_source() and not taking "
+ "a final '...' argument)")
+ assert str(e.value) == msg
+
+def test_func_returns_struct():
+ ffi = FFI()
+ ffi.cdef("""
+ struct foo_s { int aa, bb; };
+ struct foo_s foo(int a, int b);
+ """)
+ lib = ffi.verify("""
+ struct foo_s { int aa, bb; };
+ struct foo_s foo(int a, int b) {
+ struct foo_s r;
+ r.aa = a*a;
+ r.bb = b*b;
+ return r;
+ }
+ """)
+ s = lib.foo(6, 7)
+ assert repr(s) == "<cdata 'struct foo_s' owning 8 bytes>"
+ assert s.aa == 36
+ assert s.bb == 49
+
+def test_func_as_funcptr():
+ ffi = FFI()
+ ffi.cdef("int *(*const fooptr)(void);")
+ lib = ffi.verify("""
+ int *foo(void) {
+ return (int*)"foobar";
+ }
+ int *(*fooptr)(void) = foo;
+ """)
+ foochar = ffi.cast("char *(*)(void)", lib.fooptr)
+ s = foochar()
+ assert ffi.string(s) == b"foobar"
+
+def test_funcptr_as_argument():
+ ffi = FFI()
+ ffi.cdef("""
+ void qsort(void *base, size_t nel, size_t width,
+ int (*compar)(const void *, const void *));
+ """)
+ ffi.verify("#include <stdlib.h>")
+
+def test_func_as_argument():
+ ffi = FFI()
+ ffi.cdef("""
+ void qsort(void *base, size_t nel, size_t width,
+ int compar(const void *, const void *));
+ """)
+ ffi.verify("#include <stdlib.h>")
+
+def test_array_as_argument():
+ ffi = FFI()
+ ffi.cdef("""
+ size_t strlen(char string[]);
+ """)
+ ffi.verify("#include <string.h>")
+
+def test_enum_as_argument():
+ ffi = FFI()
+ ffi.cdef("""
+ enum foo_e { AA, BB, ... };
+ int foo_func(enum foo_e);
+ """)
+ lib = ffi.verify("""
+ enum foo_e { AA, CC, BB };
+ int foo_func(enum foo_e e) { return (int)e; }
+ """)
+ assert lib.foo_func(lib.BB) == 2
+ py.test.raises(TypeError, lib.foo_func, "BB")
+
+def test_enum_as_function_result():
+ ffi = FFI()
+ ffi.cdef("""
+ enum foo_e { AA, BB, ... };
+ enum foo_e foo_func(int x);
+ """)
+ lib = ffi.verify("""
+ enum foo_e { AA, CC, BB };
+ enum foo_e foo_func(int x) { return (enum foo_e)x; }
+ """)
+ assert lib.foo_func(lib.BB) == lib.BB == 2
+
+def test_enum_values():
+ ffi = FFI()
+ ffi.cdef("enum enum1_e { AA, BB };")
+ lib = ffi.verify("enum enum1_e { AA, BB };")
+ assert lib.AA == 0
+ assert lib.BB == 1
+ assert ffi.string(ffi.cast("enum enum1_e", 1)) == 'BB'
+
+def test_typedef_complete_enum():
+ ffi = FFI()
+ ffi.cdef("typedef enum { AA, BB } enum1_t;")
+ lib = ffi.verify("typedef enum { AA, BB } enum1_t;")
+ assert ffi.string(ffi.cast("enum1_t", 1)) == 'BB'
+ assert lib.AA == 0
+ assert lib.BB == 1
+
+def test_typedef_broken_complete_enum():
+ # xxx this is broken in old cffis, but works with recompiler.py
+ ffi = FFI()
+ ffi.cdef("typedef enum { AA, BB } enum1_t;")
+ lib = ffi.verify("typedef enum { AA, CC, BB } enum1_t;")
+ assert lib.AA == 0
+ assert lib.BB == 2
+
+def test_typedef_incomplete_enum():
+ ffi = FFI()
+ ffi.cdef("typedef enum { AA, BB, ... } enum1_t;")
+ lib = ffi.verify("typedef enum { AA, CC, BB } enum1_t;")
+ assert ffi.string(ffi.cast("enum1_t", 1)) == '1'
+ assert ffi.string(ffi.cast("enum1_t", 2)) == 'BB'
+ assert lib.AA == 0
+ assert lib.BB == 2
+
+def test_typedef_enum_as_argument():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef enum { AA, BB, ... } foo_t;
+ int foo_func(foo_t);
+ """)
+ lib = ffi.verify("""
+ typedef enum { AA, CC, BB } foo_t;
+ int foo_func(foo_t e) { return (int)e; }
+ """)
+ assert lib.foo_func(lib.BB) == lib.BB == 2
+ py.test.raises(TypeError, lib.foo_func, "BB")
+
+def test_typedef_enum_as_function_result():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef enum { AA, BB, ... } foo_t;
+ foo_t foo_func(int x);
+ """)
+ lib = ffi.verify("""
+ typedef enum { AA, CC, BB } foo_t;
+ foo_t foo_func(int x) { return (foo_t)x; }
+ """)
+ assert lib.foo_func(lib.BB) == lib.BB == 2
+
+def test_function_typedef():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef double func_t(double);
+ func_t sin;
+ """)
+ lib = ffi.verify('#include <math.h>', libraries=lib_m)
+ assert lib.sin(1.23) == math.sin(1.23)
+
+def test_opaque_integer_as_function_result():
+ #import platform
+ #if platform.machine().startswith('sparc'):
+ # py.test.skip('Breaks horribly on sparc (SIGILL + corrupted stack)')
+ #elif platform.machine() == 'mips64' and sys.maxsize > 2**32:
+ # py.test.skip('Segfaults on mips64el')
+ # XXX bad abuse of "struct { ...; }". It only works a bit by chance
+ # anyway. XXX think about something better :-(
+ ffi = FFI()
+ ffi.cdef("""
+ typedef struct { ...; } myhandle_t;
+ myhandle_t foo(void);
+ """)
+ lib = ffi.verify("""
+ typedef short myhandle_t;
+ myhandle_t foo(void) { return 42; }
+ """)
+ h = lib.foo()
+ assert ffi.sizeof(h) == ffi.sizeof("short")
+
+def test_return_partial_struct():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef struct { int x; ...; } foo_t;
+ foo_t foo(void);
+ """)
+ lib = ffi.verify("""
+ typedef struct { int y, x; } foo_t;
+ foo_t foo(void) { foo_t r = { 45, 81 }; return r; }
+ """)
+ h = lib.foo()
+ assert ffi.sizeof(h) == 2 * ffi.sizeof("int")
+ assert h.x == 81
+
+def test_take_and_return_partial_structs():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef struct { int x; ...; } foo_t;
+ foo_t foo(foo_t, foo_t);
+ """)
+ lib = ffi.verify("""
+ typedef struct { int y, x; } foo_t;
+ foo_t foo(foo_t a, foo_t b) {
+ foo_t r = { 100, a.x * 5 + b.x * 7 };
+ return r;
+ }
+ """)
+ args = ffi.new("foo_t[3]")
+ args[0].x = 1000
+ args[2].x = -498
+ h = lib.foo(args[0], args[2])
+ assert ffi.sizeof(h) == 2 * ffi.sizeof("int")
+ assert h.x == 1000 * 5 - 498 * 7
+
+def test_cannot_name_struct_type():
+ ffi = FFI()
+ ffi.cdef("typedef struct { int x; } **sp; void foo(sp);")
+ e = py.test.raises(VerificationError, ffi.verify,
+ "typedef struct { int x; } **sp; void foo(sp x) { }")
+ assert 'in argument of foo: unknown type name' in str(e.value)
+
+def test_dont_check_unnamable_fields():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { struct { int x; } someone; };")
+ ffi.verify("struct foo_s { struct { int x; } someone; };")
+ # assert did not crash
+
+def test_nested_anonymous_struct_exact():
+ if sys.platform == 'win32':
+ py.test.skip("nested anonymous struct/union")
+ ffi = FFI()
+ ffi.cdef("""
+ struct foo_s { struct { int a; char b; }; union { char c, d; }; };
+ """)
+ assert ffi.offsetof("struct foo_s", "c") == 2 * ffi.sizeof("int")
+ assert ffi.sizeof("struct foo_s") == 3 * ffi.sizeof("int")
+ ffi.verify("""
+ struct foo_s { struct { int a; char b; }; union { char c, d; }; };
+ """)
+ p = ffi.new("struct foo_s *")
+ assert ffi.sizeof(p[0]) == 3 * ffi.sizeof("int") # with alignment
+ p.a = 1234567
+ p.b = b'X'
+ p.c = b'Y'
+ assert p.a == 1234567
+ assert p.b == b'X'
+ assert p.c == b'Y'
+ assert p.d == b'Y'
+
+def test_nested_anonymous_struct_exact_error():
+ if sys.platform == 'win32':
+ py.test.skip("nested anonymous struct/union")
+ ffi = FFI()
+ ffi.cdef("""
+ struct foo_s { struct { int a; char b; }; union { char c, d; }; };
+ """)
+ py.test.raises(VerificationError, ffi.verify, """
+ struct foo_s { struct { int a; short b; }; union { char c, d; }; };
+ """)
+ # works fine now
+ #py.test.raises(VerificationError, ffi.verify, """
+ # struct foo_s { struct { int a; char e, b; }; union { char c, d; }; };
+ #""")
+
+def test_nested_anonymous_struct_inexact_1():
+ ffi = FFI()
+ ffi.cdef("""
+ struct foo_s { struct { char b; ...; }; union { char c, d; }; };
+ """)
+ ffi.verify("""
+ struct foo_s { int a, padding; char c, d, b; };
+ """)
+ assert ffi.sizeof("struct foo_s") == 3 * ffi.sizeof("int")
+
+def test_nested_anonymous_struct_inexact_2():
+ ffi = FFI()
+ ffi.cdef("""
+ struct foo_s { union { char c, d; }; struct { int a; char b; }; ...; };
+ """)
+ ffi.verify("""
+ struct foo_s { int a, padding; char c, d, b; };
+ """)
+ assert ffi.sizeof("struct foo_s") == 3 * ffi.sizeof("int")
+
+def test_ffi_union():
+ ffi = FFI()
+ ffi.cdef("union foo_u { char x; long *z; };")
+ ffi.verify("union foo_u { char x; int y; long *z; };")
+
+def test_ffi_union_partial():
+ ffi = FFI()
+ ffi.cdef("union foo_u { char x; ...; };")
+ ffi.verify("union foo_u { char x; int y; };")
+ assert ffi.sizeof("union foo_u") == 4
+
+def test_ffi_union_with_partial_struct():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int x; ...; }; union foo_u { struct foo_s s; };")
+ ffi.verify("struct foo_s { int a; int x; }; "
+ "union foo_u { char b[32]; struct foo_s s; };")
+ assert ffi.sizeof("struct foo_s") == 8
+ assert ffi.sizeof("union foo_u") == 32
+
+def test_ffi_union_partial_2():
+ ffi = FFI()
+ ffi.cdef("typedef union { char x; ...; } u1;")
+ ffi.verify("typedef union { char x; int y; } u1;")
+ assert ffi.sizeof("u1") == 4
+
+def test_ffi_union_with_partial_struct_2():
+ ffi = FFI()
+ ffi.cdef("typedef struct { int x; ...; } s1;"
+ "typedef union { s1 s; } u1;")
+ ffi.verify("typedef struct { int a; int x; } s1; "
+ "typedef union { char b[32]; s1 s; } u1;")
+ assert ffi.sizeof("s1") == 8
+ assert ffi.sizeof("u1") == 32
+ assert ffi.offsetof("u1", "s") == 0
+
+def test_ffi_struct_packed():
+ if sys.platform == 'win32':
+ py.test.skip("needs a GCC extension")
+ ffi = FFI()
+ ffi.cdef("struct foo_s { int b; ...; };")
+ ffi.verify("""
+ struct foo_s {
+ char a;
+ int b;
+ } __attribute__((packed));
+ """)
+
+def test_tmpdir():
+ import tempfile, os
+ from testing.udir import udir
+ tmpdir = tempfile.mkdtemp(dir=str(udir))
+ ffi = FFI()
+ ffi.cdef("int foo(int);")
+ lib = ffi.verify("int foo(int a) { return a + 42; }", tmpdir=tmpdir)
+ assert os.listdir(tmpdir)
+ assert lib.foo(100) == 142
+
+def test_relative_to():
+ py.test.skip("not available")
+ import tempfile, os
+ from testing.udir import udir
+ tmpdir = tempfile.mkdtemp(dir=str(udir))
+ ffi = FFI()
+ ffi.cdef("int foo(int);")
+ f = open(os.path.join(tmpdir, 'foo.h'), 'w')
+ f.write("int foo(int a) { return a + 42; }\n")
+ f.close()
+ lib = ffi.verify('#include "foo.h"',
+ include_dirs=['.'],
+ relative_to=os.path.join(tmpdir, 'x'))
+ assert lib.foo(100) == 142
+
+def test_bug1():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef struct tdlhandle_s { ...; } *tdl_handle_t;
+ typedef struct my_error_code_ {
+ tdl_handle_t *rh;
+ } my_error_code_t;
+ """)
+ ffi.verify("""
+ typedef struct tdlhandle_s { int foo; } *tdl_handle_t;
+ typedef struct my_error_code_ {
+ tdl_handle_t *rh;
+ } my_error_code_t;
+ """)
+
+def test_bool():
+ if sys.platform == 'win32':
+ py.test.skip("_Bool not in MSVC")
+ ffi = FFI()
+ ffi.cdef("struct foo_s { _Bool x; };"
+ "_Bool foo(_Bool); _Bool (*foop)(_Bool);")
+ lib = ffi.verify("""
+ struct foo_s { _Bool x; };
+ int foo(int arg) {
+ return !arg;
+ }
+ _Bool _foofunc(_Bool x) {
+ return !x;
+ }
+ _Bool (*foop)(_Bool) = _foofunc;
+ """)
+ p = ffi.new("struct foo_s *")
+ p.x = 1
+ assert p.x is True
+ py.test.raises(OverflowError, "p.x = -1")
+ py.test.raises(TypeError, "p.x = 0.0")
+ assert lib.foop(1) is False
+ assert lib.foop(True) is False
+ assert lib.foop(0) is True
+ py.test.raises(OverflowError, lib.foop, 42)
+ py.test.raises(TypeError, lib.foop, 0.0)
+ assert lib.foo(1) is False
+ assert lib.foo(True) is False
+ assert lib.foo(0) is True
+ py.test.raises(OverflowError, lib.foo, 42)
+ py.test.raises(TypeError, lib.foo, 0.0)
+ assert int(ffi.cast("_Bool", long(1))) == 1
+ assert int(ffi.cast("_Bool", long(0))) == 0
+ assert int(ffi.cast("_Bool", long(-1))) == 1
+ assert int(ffi.cast("_Bool", 10**200)) == 1
+ assert int(ffi.cast("_Bool", 10**40000)) == 1
+ #
+ class Foo(object):
+ def __int__(self):
+ self.seen = 1
+ return result
+ f = Foo()
+ f.seen = 0
+ result = 42
+ assert int(ffi.cast("_Bool", f)) == 1
+ assert f.seen
+ f.seen = 0
+ result = 0
+ assert int(ffi.cast("_Bool", f)) == 0
+ assert f.seen
+ #
+ py.test.raises(TypeError, ffi.cast, "_Bool", [])
+
+def test_bool_on_long_double():
+ if sys.platform == 'win32':
+ py.test.skip("_Bool not in MSVC")
+ f = 1E-250
+ if f == 0.0 or f*f != 0.0:
+ py.test.skip("unexpected precision")
+ ffi = FFI()
+ ffi.cdef("long double square(long double f); _Bool opposite(_Bool);")
+ lib = ffi.verify("long double square(long double f) { return f*f; }\n"
+ "_Bool opposite(_Bool x) { return !x; }")
+ f0 = lib.square(0.0)
+ f2 = lib.square(f)
+ f3 = lib.square(f * 2.0)
+ if repr(f2) == repr(f3):
+ py.test.skip("long double doesn't have enough precision")
+ assert float(f0) == float(f2) == float(f3) == 0.0 # too tiny for 'double'
+ assert int(ffi.cast("_Bool", f2)) == 1
+ assert int(ffi.cast("_Bool", f3)) == 1
+ assert int(ffi.cast("_Bool", f0)) == 0
+ py.test.raises(TypeError, lib.opposite, f2)
+
+def test_cannot_pass_float():
+ for basetype in ['char', 'short', 'int', 'long', 'long long']:
+ for sign in ['signed', 'unsigned']:
+ type = '%s %s' % (sign, basetype)
+ ffi = FFI()
+ ffi.cdef("struct foo_s { %s x; };\n"
+ "int foo(%s);" % (type, type))
+ lib = ffi.verify("""
+ struct foo_s { %s x; };
+ int foo(%s arg) {
+ return !arg;
+ }
+ """ % (type, type))
+ p = ffi.new("struct foo_s *")
+ py.test.raises(TypeError, "p.x = 0.0")
+ assert lib.foo(42) == 0
+ assert lib.foo(0) == 1
+ py.test.raises(TypeError, lib.foo, 0.0)
+
+def test_addressof():
+ ffi = FFI()
+ ffi.cdef("""
+ struct point_s { int x, y; };
+ struct foo_s { int z; struct point_s point; };
+ struct point_s sum_coord(struct point_s *);
+ """)
+ lib = ffi.verify("""
+ struct point_s { int x, y; };
+ struct foo_s { int z; struct point_s point; };
+ struct point_s sum_coord(struct point_s *point) {
+ struct point_s r;
+ r.x = point->x + point->y;
+ r.y = point->x - point->y;
+ return r;
+ }
+ """)
+ p = ffi.new("struct foo_s *")
+ p.point.x = 16
+ p.point.y = 9
+ py.test.raises(TypeError, lib.sum_coord, p.point)
+ res = lib.sum_coord(ffi.addressof(p.point))
+ assert res.x == 25
+ assert res.y == 7
+ res2 = lib.sum_coord(ffi.addressof(res))
+ assert res2.x == 32
+ assert res2.y == 18
+ py.test.raises(TypeError, lib.sum_coord, res2)
+
+def test_callback_in_thread():
+ py.test.xfail("adapt or remove")
+ if sys.platform == 'win32':
+ py.test.skip("pthread only")
+ import os, subprocess, imp
+ arg = os.path.join(os.path.dirname(__file__), 'callback_in_thread.py')
+ g = subprocess.Popen([sys.executable, arg,
+ os.path.dirname(imp.find_module('cffi')[1])])
+ result = g.wait()
+ assert result == 0
+
+def test_keepalive_lib():
+ py.test.xfail("adapt or remove")
+ ffi = FFI()
+ ffi.cdef("int foobar(void);")
+ lib = ffi.verify("int foobar(void) { return 42; }")
+ func = lib.foobar
+ ffi_r = weakref.ref(ffi)
+ lib_r = weakref.ref(lib)
+ del ffi
+ import gc; gc.collect() # lib stays alive
+ assert lib_r() is not None
+ assert ffi_r() is not None
+ assert func() == 42
+
+def test_keepalive_ffi():
+ py.test.xfail("adapt or remove")
+ ffi = FFI()
+ ffi.cdef("int foobar(void);")
+ lib = ffi.verify("int foobar(void) { return 42; }")
+ func = lib.foobar
+ ffi_r = weakref.ref(ffi)
+ lib_r = weakref.ref(lib)
+ del lib
+ import gc; gc.collect() # ffi stays alive
+ assert ffi_r() is not None
+ assert lib_r() is not None
+ assert func() == 42
+
+def test_FILE_stored_in_stdout():
+ if not sys.platform.startswith('linux'):
+ py.test.skip("likely, we cannot assign to stdout")
+ ffi = FFI()
+ ffi.cdef("int printf(const char *, ...); FILE *setstdout(FILE *);")
+ lib = ffi.verify("""
+ #include <stdio.h>
+ FILE *setstdout(FILE *f) {
+ FILE *result = stdout;
+ stdout = f;
+ return result;
+ }
+ """)
+ import os
+ fdr, fdw = os.pipe()
+ fw1 = os.fdopen(fdw, 'wb', 256)
+ old_stdout = lib.setstdout(fw1)
+ try:
+ #
+ fw1.write(b"X")
+ r = lib.printf(b"hello, %d!\n", ffi.cast("int", 42))
+ fw1.close()
+ assert r == len("hello, 42!\n")
+ #
+ finally:
+ lib.setstdout(old_stdout)
+ #
+ result = os.read(fdr, 256)
+ os.close(fdr)
+ # the 'X' might remain in the user-level buffer of 'fw1' and
+ # end up showing up after the 'hello, 42!\n'
+ assert result == b"Xhello, 42!\n" or result == b"hello, 42!\nX"
+
+def test_FILE_stored_explicitly():
+ ffi = FFI()
+ ffi.cdef("int myprintf11(const char *, int); FILE *myfile;")
+ lib = ffi.verify("""
+ #include <stdio.h>
+ FILE *myfile;
+ int myprintf11(const char *out, int value) {
+ return fprintf(myfile, out, value);
+ }
+ """)
+ import os
+ fdr, fdw = os.pipe()
+ fw1 = os.fdopen(fdw, 'wb', 256)
+ lib.myfile = ffi.cast("FILE *", fw1)
+ #
+ fw1.write(b"X")
+ r = lib.myprintf11(b"hello, %d!\n", ffi.cast("int", 42))
+ fw1.close()
+ assert r == len("hello, 42!\n")
+ #
+ result = os.read(fdr, 256)
+ os.close(fdr)
+ # the 'X' might remain in the user-level buffer of 'fw1' and
+ # end up showing up after the 'hello, 42!\n'
+ assert result == b"Xhello, 42!\n" or result == b"hello, 42!\nX"
+
+def test_global_array_with_missing_length():
+ ffi = FFI()
+ ffi.cdef("int fooarray[];")
+ lib = ffi.verify("int fooarray[50];")
+ assert repr(lib.fooarray).startswith("<cdata 'int *'")
+
+def test_global_array_with_dotdotdot_length():
+ ffi = FFI()
+ ffi.cdef("int fooarray[...];")
+ lib = ffi.verify("int fooarray[50];")
+ assert repr(lib.fooarray).startswith("<cdata 'int[50]'")
+
+def test_bad_global_array_with_dotdotdot_length():
+ py.test.xfail("was detected only because 23 bytes cannot be divided by 4; "
+ "redo more generally")
+ ffi = FFI()
+ ffi.cdef("int fooarray[...];")
+ py.test.raises(VerificationError, ffi.verify, "char fooarray[23];")
+
+def test_struct_containing_struct():
+ ffi = FFI()
+ ffi.cdef("struct foo_s { ...; }; struct bar_s { struct foo_s f; ...; };")
+ ffi.verify("struct foo_s { int x; }; struct bar_s { struct foo_s f; };")
+ #
+ ffi = FFI()
+ ffi.cdef("struct foo_s { struct bar_s f; ...; }; struct bar_s { ...; };")
+ ffi.verify("struct bar_s { int x; }; struct foo_s { struct bar_s f; };")
+
+def test_struct_returned_by_func():
+ ffi = FFI()
+ ffi.cdef("typedef ... foo_t; foo_t myfunc(void);")
+ e = py.test.raises(TypeError, ffi.verify,
+ "typedef struct { int x; } foo_t; "
+ "foo_t myfunc(void) { foo_t x = { 42 }; return x; }")
+ assert str(e.value) == (
+ "function myfunc: 'foo_t' is used as result type, but is opaque")
+
+def test_include():
+ ffi1 = FFI()
+ ffi1.cdef("typedef struct { int x; ...; } foo_t;")
+ ffi1.verify("typedef struct { int y, x; } foo_t;")
+ ffi2 = FFI()
+ ffi2.include(ffi1)
+ ffi2.cdef("int myfunc(foo_t *);")
+ lib = ffi2.verify("typedef struct { int y, x; } foo_t;"
+ "int myfunc(foo_t *p) { return 42 * p->x; }")
+ res = lib.myfunc(ffi2.new("foo_t *", {'x': 10}))
+ assert res == 420
+ res = lib.myfunc(ffi1.new("foo_t *", {'x': -10}))
+ assert res == -420
+
+def test_include_enum():
+ ffi1 = FFI()
+ ffi1.cdef("enum foo_e { AA, ... };")
+ lib1 = ffi1.verify("enum foo_e { CC, BB, AA };")
+ ffi2 = FFI()
+ ffi2.include(ffi1)
+ ffi2.cdef("int myfunc(enum foo_e);")
+ lib2 = ffi2.verify("enum foo_e { CC, BB, AA };"
+ "int myfunc(enum foo_e x) { return (int)x; }")
+ res = lib2.myfunc(lib2.AA)
+ assert res == 2
+
+def test_named_pointer_as_argument():
+ ffi = FFI()
+ ffi.cdef("typedef struct { int x; } *mystruct_p;\n"
+ "mystruct_p ff5a(mystruct_p);")
+ lib = ffi.verify("typedef struct { int x; } *mystruct_p;\n"
+ "mystruct_p ff5a(mystruct_p p) { p->x += 40; return p; }")
+ p = ffi.new("mystruct_p", [-2])
+ q = lib.ff5a(p)
+ assert q == p
+ assert p.x == 38
+
+def test_enum_size():
+ cases = [('123', 4, 4294967295),
+ ('4294967295U', 4, 4294967295),
+ ('-123', 4, -1),
+ ('-2147483647-1', 4, -1),
+ ]
+ if FFI().sizeof("long") == 8:
+ cases += [('4294967296L', 8, 2**64-1),
+ ('%dUL' % (2**64-1), 8, 2**64-1),
+ ('-2147483649L', 8, -1),
+ ('%dL-1L' % (1-2**63), 8, -1)]
+ for hidden_value, expected_size, expected_minus1 in cases:
+ if sys.platform == 'win32' and 'U' in hidden_value:
+ continue # skipped on Windows
+ ffi = FFI()
+ ffi.cdef("enum foo_e { AA, BB, ... };")
+ lib = ffi.verify("enum foo_e { AA, BB=%s };" % hidden_value)
+ assert lib.AA == 0
+ assert lib.BB == eval(hidden_value.replace('U', '').replace('L', ''))
+ assert ffi.sizeof("enum foo_e") == expected_size
+ if sys.platform != 'win32':
+ assert int(ffi.cast("enum foo_e", -1)) == expected_minus1
+ # test with the large value hidden:
+ # disabled so far, doesn't work
+## for hidden_value, expected_size, expected_minus1 in cases:
+## ffi = FFI()
+## ffi.cdef("enum foo_e { AA, BB, ... };")
+## lib = ffi.verify("enum foo_e { AA, BB=%s };" % hidden_value)
+## assert lib.AA == 0
+## assert ffi.sizeof("enum foo_e") == expected_size
+## assert int(ffi.cast("enum foo_e", -1)) == expected_minus1
+
+def test_enum_bug118():
+ maxulong = 256 ** FFI().sizeof("unsigned long") - 1
+ for c2, c2c in [(-1, ''),
+ (-1, ''),
+ (0xffffffff, 'U'),
+ (maxulong, 'UL'),
+ (-int(maxulong / 3), 'L')]:
+ if c2c and sys.platform == 'win32':
+ continue # enums may always be signed with MSVC
+ ffi = FFI()
+ ffi.cdef("enum foo_e { AA };")
+ lib = ffi.verify("enum foo_e { AA=%s%s };" % (c2, c2c))
+ assert lib.AA == c2
+
+def test_string_to_voidp_arg():
+ ffi = FFI()
+ ffi.cdef("int myfunc(void *);")
+ lib = ffi.verify("int myfunc(void *p) { return ((signed char *)p)[0]; }")
+ res = lib.myfunc(b"hi!")
+ assert res == ord(b"h")
+ p = ffi.new("char[]", b"gah")
+ res = lib.myfunc(p)
+ assert res == ord(b"g")
+ res = lib.myfunc(ffi.cast("void *", p))
+ assert res == ord(b"g")
+ res = lib.myfunc(ffi.cast("int *", p))
+ assert res == ord(b"g")
+
+def test_callback_indirection():
+ ffi = FFI()
+ ffi.cdef("""
+ int (*python_callback)(int how_many, int *values);
+ int (*const c_callback)(int,...); /* pass this ptr to C routines */
+ int some_c_function(int(*cb)(int,...));
+ """)
+ lib = ffi.verify("""
+ #include <stdarg.h>
+ #ifdef _WIN32
+ #include <malloc.h>
+ #define alloca _alloca
+ #else
+ # ifdef __FreeBSD__
+ # include <stdlib.h>
+ # else
+ # include <alloca.h>
+ # endif
+ #endif
+ static int (*python_callback)(int how_many, int *values);
+ static int c_callback(int how_many, ...) {
+ va_list ap;
+ /* collect the "..." arguments into the values[] array */
+ int i, *values = alloca((size_t)how_many * sizeof(int));
+ va_start(ap, how_many);
+ for (i=0; i<how_many; i++)
+ values[i] = va_arg(ap, int);
+ va_end(ap);
+ return python_callback(how_many, values);
+ }
+ int some_c_function(int(*cb)(int,...)) {
+ int result = cb(2, 10, 20);
+ result += cb(3, 30, 40, 50);
+ return result;
+ }
+ """)
+ seen = []
+ @ffi.callback("int(int, int*)")
+ def python_callback(how_many, values):
+ seen.append([values[i] for i in range(how_many)])
+ return 42
+ lib.python_callback = python_callback
+
+ res = lib.some_c_function(lib.c_callback)
+ assert res == 84
+ assert seen == [[10, 20], [30, 40, 50]]
+
+def test_floatstar_argument():
+ ffi = FFI()
+ ffi.cdef("float sum3floats(float *);")
+ lib = ffi.verify("""
+ float sum3floats(float *f) {
+ return f[0] + f[1] + f[2];
+ }
+ """)
+ assert lib.sum3floats((1.5, 2.5, 3.5)) == 7.5
+ p = ffi.new("float[]", (1.5, 2.5, 3.5))
+ assert lib.sum3floats(p) == 7.5
+
+def test_charstar_argument():
+ ffi = FFI()
+ ffi.cdef("char sum3chars(char *);")
+ lib = ffi.verify("""
+ char sum3chars(char *f) {
+ return (char)(f[0] + f[1] + f[2]);
+ }
+ """)
+ assert lib.sum3chars((b'\x10', b'\x20', b'\x30')) == b'\x60'
+ p = ffi.new("char[]", b'\x10\x20\x30')
+ assert lib.sum3chars(p) == b'\x60'
+
+def test_passing_string_or_NULL():
+ ffi = FFI()
+ ffi.cdef("int seeme1(char *); int seeme2(int *);")
+ lib = ffi.verify("""
+ int seeme1(char *x) {
+ return (x == NULL);
+ }
+ int seeme2(int *x) {
+ return (x == NULL);
+ }
+ """)
+ assert lib.seeme1(b"foo") == 0
+ assert lib.seeme1(ffi.NULL) == 1
+ assert lib.seeme2([42, 43]) == 0
+ assert lib.seeme2(ffi.NULL) == 1
+ py.test.raises(TypeError, lib.seeme1, None)
+ py.test.raises(TypeError, lib.seeme2, None)
+ py.test.raises(TypeError, lib.seeme1, 0.0)
+ py.test.raises(TypeError, lib.seeme2, 0.0)
+ py.test.raises(TypeError, lib.seeme1, 0)
+ py.test.raises(TypeError, lib.seeme2, 0)
+ zeroL = 99999999999999999999
+ zeroL -= 99999999999999999999
+ py.test.raises(TypeError, lib.seeme2, zeroL)
+
+def test_typeof_function():
+ ffi = FFI()
+ ffi.cdef("int foo(int, char);")
+ lib = ffi.verify("int foo(int x, char y) { (void)x; (void)y; return 42; }")
+ ctype = ffi.typeof(lib.foo)
+ assert len(ctype.args) == 2
+ assert ctype.result == ffi.typeof("int")
+
+def test_call_with_voidstar_arg():
+ ffi = FFI()
+ ffi.cdef("int f(void *);")
+ lib = ffi.verify("int f(void *x) { return ((char*)x)[0]; }")
+ assert lib.f(b"foobar") == ord(b"f")
+
+def test_dir():
+ ffi = FFI()
+ ffi.cdef("""void somefunc(void);
+ extern int somevar, somearray[2];
+ static char *const sv2;
+ enum my_e { AA, BB, ... };
+ #define FOO ...""")
+ lib = ffi.verify("""void somefunc(void) { }
+ int somevar, somearray[2];
+ #define sv2 "text"
+ enum my_e { AA, BB };
+ #define FOO 42""")
+ assert dir(lib) == ['AA', 'BB', 'FOO', 'somearray',
+ 'somefunc', 'somevar', 'sv2']
+
+def test_typeof_func_with_struct_argument():
+ ffi = FFI()
+ ffi.cdef("""struct s { int a; }; int foo(struct s);""")
+ lib = ffi.verify("""struct s { int a; };
+ int foo(struct s x) { return x.a; }""")
+ s = ffi.new("struct s *", [-1234])
+ m = lib.foo(s[0])
+ assert m == -1234
+ assert repr(ffi.typeof(lib.foo)) == "<ctype 'int(*)(struct s)'>"
+
+def test_bug_const_char_ptr_array_1():
+ ffi = FFI()
+ ffi.cdef("""const char *a[...];""")
+ lib = ffi.verify("""const char *a[5];""")
+ assert repr(ffi.typeof(lib.a)) == "<ctype 'char *[5]'>"
+
+def test_bug_const_char_ptr_array_2():
+ ffi = FFI()
+ ffi.cdef("""const int a[];""")
+ lib = ffi.verify("""const int a[5];""")
+ assert repr(ffi.typeof(lib.a)) == "<ctype 'int *'>"
+
+def _test_various_calls(force_libffi):
+ cdef_source = """
+ int xvalue;
+ long long ivalue, rvalue;
+ float fvalue;
+ double dvalue;
+ long double Dvalue;
+ signed char tf_bb(signed char x, signed char c);
+ unsigned char tf_bB(signed char x, unsigned char c);
+ short tf_bh(signed char x, short c);
+ unsigned short tf_bH(signed char x, unsigned short c);
+ int tf_bi(signed char x, int c);
+ unsigned int tf_bI(signed char x, unsigned int c);
+ long tf_bl(signed char x, long c);
+ unsigned long tf_bL(signed char x, unsigned long c);
+ long long tf_bq(signed char x, long long c);
+ unsigned long long tf_bQ(signed char x, unsigned long long c);
+ float tf_bf(signed char x, float c);
+ double tf_bd(signed char x, double c);
+ long double tf_bD(signed char x, long double c);
+ """
+ if force_libffi:
+ cdef_source = (cdef_source
+ .replace('tf_', '(*const tf_')
+ .replace('(signed char x', ')(signed char x'))
+ ffi = FFI()
+ ffi.cdef(cdef_source)
+ lib = ffi.verify("""
+ int xvalue;
+ long long ivalue, rvalue;
+ float fvalue;
+ double dvalue;
+ long double Dvalue;
+
+ typedef signed char b_t;
+ typedef unsigned char B_t;
+ typedef short h_t;
+ typedef unsigned short H_t;
+ typedef int i_t;
+ typedef unsigned int I_t;
+ typedef long l_t;
+ typedef unsigned long L_t;
+ typedef long long q_t;
+ typedef unsigned long long Q_t;
+ typedef float f_t;
+ typedef double d_t;
+ typedef long double D_t;
+ #define S(letter) xvalue = (int)x; letter##value = (letter##_t)c;
+ #define R(letter) return (letter##_t)rvalue;
+
+ signed char tf_bb(signed char x, signed char c) { S(i) R(b) }
+ unsigned char tf_bB(signed char x, unsigned char c) { S(i) R(B) }
+ short tf_bh(signed char x, short c) { S(i) R(h) }
+ unsigned short tf_bH(signed char x, unsigned short c) { S(i) R(H) }
+ int tf_bi(signed char x, int c) { S(i) R(i) }
+ unsigned int tf_bI(signed char x, unsigned int c) { S(i) R(I) }
+ long tf_bl(signed char x, long c) { S(i) R(l) }
+ unsigned long tf_bL(signed char x, unsigned long c) { S(i) R(L) }
+ long long tf_bq(signed char x, long long c) { S(i) R(q) }
+ unsigned long long tf_bQ(signed char x, unsigned long long c) { S(i) R(Q) }
+ float tf_bf(signed char x, float c) { S(f) R(f) }
+ double tf_bd(signed char x, double c) { S(d) R(d) }
+ long double tf_bD(signed char x, long double c) { S(D) R(D) }
+ """)
+ lib.rvalue = 0x7182838485868788
+ for kind, cname in [('b', 'signed char'),
+ ('B', 'unsigned char'),
+ ('h', 'short'),
+ ('H', 'unsigned short'),
+ ('i', 'int'),
+ ('I', 'unsigned int'),
+ ('l', 'long'),
+ ('L', 'unsigned long'),
+ ('q', 'long long'),
+ ('Q', 'unsigned long long'),
+ ('f', 'float'),
+ ('d', 'double'),
+ ('D', 'long double')]:
+ sign = +1 if 'unsigned' in cname else -1
+ lib.xvalue = 0
+ lib.ivalue = 0
+ lib.fvalue = 0
+ lib.dvalue = 0
+ lib.Dvalue = 0
+ fun = getattr(lib, 'tf_b' + kind)
+ res = fun(-42, sign * 99)
+ if kind == 'D':
+ res = float(res)
+ assert res == int(ffi.cast(cname, 0x7182838485868788))
+ assert lib.xvalue == -42
+ if kind in 'fdD':
+ assert float(getattr(lib, kind + 'value')) == -99.0
+ else:
+ assert lib.ivalue == sign * 99
+
+def test_various_calls_direct():
+ _test_various_calls(force_libffi=False)
+
+def test_various_calls_libffi():
+ _test_various_calls(force_libffi=True)
+
+def test_ptr_to_opaque():
+ ffi = FFI()
+ ffi.cdef("typedef ... foo_t; int f1(foo_t*); foo_t *f2(int);")
+ lib = ffi.verify("""
+ #include <stdlib.h>
+ typedef struct { int x; } foo_t;
+ int f1(foo_t* p) {
+ int x = p->x;
+ free(p);
+ return x;
+ }
+ foo_t *f2(int x) {
+ foo_t *p = malloc(sizeof(foo_t));
+ p->x = x;
+ return p;
+ }
+ """)
+ p = lib.f2(42)
+ x = lib.f1(p)
+ assert x == 42
+
+def _run_in_multiple_threads(test1):
+ test1()
+ import sys
+ try:
+ import thread
+ except ImportError:
+ import _thread as thread
+ errors = []
+ def wrapper(lock):
+ try:
+ test1()
+ except:
+ errors.append(sys.exc_info())
+ lock.release()
+ locks = []
+ for i in range(10):
+ _lock = thread.allocate_lock()
+ _lock.acquire()
+ thread.start_new_thread(wrapper, (_lock,))
+ locks.append(_lock)
+ for _lock in locks:
+ _lock.acquire()
+ if errors:
+ raise errors[0][1]
+
+def test_errno_working_even_with_pypys_jit():
+ ffi = FFI()
+ ffi.cdef("int f(int);")
+ lib = ffi.verify("""
+ #include <errno.h>
+ int f(int x) { return (errno = errno + x); }
+ """)
+ @_run_in_multiple_threads
+ def test1():
+ ffi.errno = 0
+ for i in range(10000):
+ e = lib.f(1)
+ assert e == i + 1
+ assert ffi.errno == e
+ for i in range(10000):
+ ffi.errno = i
+ e = lib.f(42)
+ assert e == i + 42
+
+def test_getlasterror_working_even_with_pypys_jit():
+ if sys.platform != 'win32':
+ py.test.skip("win32-only test")
+ ffi = FFI()
+ ffi.cdef("void SetLastError(DWORD);")
+ lib = ffi.dlopen("Kernel32.dll")
+ @_run_in_multiple_threads
+ def test1():
+ for i in range(10000):
+ n = (1 << 29) + i
+ lib.SetLastError(n)
+ assert ffi.getwinerror()[0] == n
+
+def test_verify_dlopen_flags():
+ if not hasattr(sys, 'setdlopenflags'):
+ py.test.skip("requires sys.setdlopenflags()")
+ # Careful with RTLD_GLOBAL. If by chance the FFI is not deleted
+ # promptly, like on PyPy, then other tests may see the same
+ # exported symbols as well. So we must not export a simple name
+ # like 'foo'!
+ old = sys.getdlopenflags()
+ try:
+ ffi1 = FFI()
+ ffi1.cdef("int foo_verify_dlopen_flags_1;")
+ sys.setdlopenflags(ffi1.RTLD_GLOBAL | ffi1.RTLD_NOW)
+ lib1 = ffi1.verify("int foo_verify_dlopen_flags_1;")
+ finally:
+ sys.setdlopenflags(old)
+
+ ffi2 = FFI()
+ ffi2.cdef("int *getptr(void);")
+ lib2 = ffi2.verify("""
+ extern int foo_verify_dlopen_flags_1;
+ static int *getptr(void) { return &foo_verify_dlopen_flags_1; }
+ """)
+ p = lib2.getptr()
+ assert ffi1.addressof(lib1, 'foo_verify_dlopen_flags_1') == p
+
+def test_consider_not_implemented_function_type():
+ ffi = FFI()
+ ffi.cdef("typedef union { int a; float b; } Data;"
+ "typedef struct { int a:2; } MyStr;"
+ "typedef void (*foofunc_t)(Data);"
+ "typedef Data (*bazfunc_t)(void);"
+ "typedef MyStr (*barfunc_t)(void);")
+ fooptr = ffi.cast("foofunc_t", 123)
+ bazptr = ffi.cast("bazfunc_t", 123)
+ barptr = ffi.cast("barfunc_t", 123)
+ # assert did not crash so far
+ e = py.test.raises(NotImplementedError, fooptr, ffi.new("Data *"))
+ assert str(e.value) == (
+ "ctype 'Data' not supported as argument by libffi. Unions are only "
+ "supported as argument if the function is 'API mode' and "
+ "non-variadic (i.e. declared inside ffibuilder.cdef()+"
+ "ffibuilder.set_source() and not taking a final '...' argument)")
+ e = py.test.raises(NotImplementedError, bazptr)
+ assert str(e.value) == (
+ "ctype 'Data' not supported as return value by libffi. Unions are "
+ "only supported as return value if the function is 'API mode' and "
+ "non-variadic (i.e. declared inside ffibuilder.cdef()+"
+ "ffibuilder.set_source() and not taking a final '...' argument)")
+ e = py.test.raises(NotImplementedError, barptr)
+ assert str(e.value) == (
+ "ctype 'MyStr' not supported as return value. It is a struct with "
+ "bit fields, which libffi does not support. Such structs are only "
+ "supported as return value if the function is 'API mode' and non-"
+ "variadic (i.e. declared inside ffibuilder.cdef()+ffibuilder."
+ "set_source() and not taking a final '...' argument)")
+
+def test_verify_extra_arguments():
+ ffi = FFI()
+ ffi.cdef("#define ABA ...")
+ lib = ffi.verify("", define_macros=[('ABA', '42')])
+ assert lib.ABA == 42
+
+def test_implicit_unicode_on_windows():
+ from cffi import FFIError
+ if sys.platform != 'win32':
+ py.test.skip("win32-only test")
+ ffi = FFI()
+ e = py.test.raises(FFIError, ffi.cdef, "int foo(LPTSTR);")
+ assert str(e.value) == ("The Windows type 'LPTSTR' is only available after"
+ " you call ffi.set_unicode()")
+ for with_unicode in [True, False]:
+ ffi = FFI()
+ ffi.set_unicode(with_unicode)
+ ffi.cdef("""
+ DWORD GetModuleFileName(HMODULE hModule, LPTSTR lpFilename,
+ DWORD nSize);
+ """)
+ lib = ffi.verify("""
+ #include <windows.h>
+ """, libraries=['Kernel32'])
+ outbuf = ffi.new("TCHAR[]", 200)
+ n = lib.GetModuleFileName(ffi.NULL, outbuf, 500)
+ assert 0 < n < 500
+ for i in range(n):
+ #print repr(outbuf[i])
+ assert ord(outbuf[i]) != 0
+ assert ord(outbuf[n]) == 0
+ assert ord(outbuf[0]) < 128 # should be a letter, or '\'
+
+def test_define_known_value():
+ ffi = FFI()
+ ffi.cdef("#define FOO 0x123")
+ lib = ffi.verify("#define FOO 0x123")
+ assert lib.FOO == 0x123
+
+def test_define_wrong_value():
+ ffi = FFI()
+ ffi.cdef("#define FOO 123")
+ lib = ffi.verify("#define FOO 124") # used to complain
+ e = py.test.raises(ffi.error, "lib.FOO")
+ assert str(e.value) == ("the C compiler says 'FOO' is equal to 124 (0x7c),"
+ " but the cdef disagrees")
+
+def test_some_integer_type_for_issue73():
+ ffi = FFI()
+ ffi.cdef("""
+ typedef int... AnIntegerWith32Bits;
+ typedef AnIntegerWith32Bits (*AFunctionReturningInteger) (void);
+ AnIntegerWith32Bits InvokeFunction(AFunctionReturningInteger);
+ """)
+ lib = ffi.verify("""
+ #ifdef __LP64__
+ typedef int AnIntegerWith32Bits;
+ #else
+ typedef long AnIntegerWith32Bits;
+ #endif
+ typedef AnIntegerWith32Bits (*AFunctionReturningInteger) (void);
+ AnIntegerWith32Bits InvokeFunction(AFunctionReturningInteger f) {
+ return f();
+ }
+ """)
+ @ffi.callback("AFunctionReturningInteger")
+ def add():
+ return 3 + 4
+ x = lib.InvokeFunction(add)
+ assert x == 7
+
+def test_unsupported_some_primitive_types():
+ ffi = FFI()
+ py.test.raises((FFIError, # with pycparser <= 2.17
+ CDefError), # with pycparser >= 2.18
+ ffi.cdef, """typedef void... foo_t;""")
+ #
+ ffi.cdef("typedef int... foo_t;")
+ py.test.raises(VerificationError, ffi.verify, "typedef float foo_t;")
+
+def test_windows_dllimport_data():
+ if sys.platform != 'win32':
+ py.test.skip("Windows only")
+ from testing.udir import udir
+ tmpfile = udir.join('dllimport_data.c')
+ tmpfile.write('int my_value = 42;\n')
+ ffi = FFI()
+ ffi.cdef("int my_value;")
+ lib = ffi.verify("extern __declspec(dllimport) int my_value;",
+ sources = [str(tmpfile)])
+ assert lib.my_value == 42
+
+def test_macro_var():
+ ffi = FFI()
+ ffi.cdef("int myarray[50], my_value;")
+ lib = ffi.verify("""
+ int myarray[50];
+ int *get_my_value(void) {
+ static int index = 0;
+ return &myarray[index++];
+ }
+ #define my_value (*get_my_value())
+ """)
+ assert lib.my_value == 0 # [0]
+ lib.my_value = 42 # [1]
+ assert lib.myarray[1] == 42
+ assert lib.my_value == 0 # [2]
+ lib.myarray[3] = 63
+ assert lib.my_value == 63 # [3]
+ p = ffi.addressof(lib, 'my_value') # [4]
+ assert p[-1] == 63
+ assert p[0] == 0
+ assert p == lib.myarray + 4
+ p[1] = 82
+ assert lib.my_value == 82 # [5]
+
+def test_const_pointer_to_pointer():
+ ffi = FFI()
+ ffi.cdef("struct s { char *const *a; };")
+ ffi.verify("struct s { char *const *a; };")
+
+def test_share_FILE():
+ ffi1 = FFI()
+ ffi1.cdef("void do_stuff(FILE *);")
+ lib1 = ffi1.verify("void do_stuff(FILE *f) { (void)f; }")
+ ffi2 = FFI()
+ ffi2.cdef("FILE *barize(void);")
+ lib2 = ffi2.verify("FILE *barize(void) { return NULL; }")
+ lib1.do_stuff(lib2.barize())
+
+def test_win_common_types():
+ if sys.platform != 'win32':
+ py.test.skip("Windows only")
+ ffi = FFI()
+ ffi.set_unicode(True)
+ ffi.verify("")
+ assert ffi.typeof("PBYTE") is ffi.typeof("unsigned char *")
+ if sys.maxsize > 2**32:
+ expected = "unsigned long long"
+ else:
+ expected = "unsigned int"
+ assert ffi.typeof("UINT_PTR") is ffi.typeof(expected)
+ assert ffi.typeof("PTSTR") is ffi.typeof("wchar_t *")
+
+def _only_test_on_linux_intel():
+ if not sys.platform.startswith('linux'):
+ py.test.skip('only running the memory-intensive test on Linux')
+ import platform
+ machine = platform.machine()
+ if 'x86' not in machine and 'x64' not in machine:
+ py.test.skip('only running the memory-intensive test on x86/x64')
+
+def test_ffi_gc_size_arg():
+ _only_test_on_linux_intel()
+ ffi = FFI()
+ ffi.cdef("void *malloc(size_t); void free(void *);")
+ lib = ffi.verify(r"""
+ #include <stdlib.h>
+ """)
+ for i in range(2000):
+ p = lib.malloc(20*1024*1024) # 20 MB
+ p1 = ffi.cast("char *", p)
+ for j in range(0, 20*1024*1024, 4096):
+ p1[j] = b'!'
+ p = ffi.gc(p, lib.free, 20*1024*1024)
+ del p
+ # with PyPy's GC, the above would rapidly consume 40 GB of RAM
+ # without the third argument to ffi.gc()
+
+def test_ffi_gc_size_arg_2():
+ # a variant of the above: this "attack" works on cpython's cyclic gc too
+ # and I found no obvious way to prevent that. So for now, this test
+ # is skipped on CPython, where it eats all the memory.
+ if '__pypy__' not in sys.builtin_module_names:
+ py.test.skip("find a way to tweak the cyclic GC of CPython")
+ _only_test_on_linux_intel()
+ ffi = FFI()
+ ffi.cdef("void *malloc(size_t); void free(void *);")
+ lib = ffi.verify(r"""
+ #include <stdlib.h>
+ """)
+ class X(object):
+ pass
+ for i in range(2000):
+ p = lib.malloc(50*1024*1024) # 50 MB
+ p1 = ffi.cast("char *", p)
+ for j in range(0, 50*1024*1024, 4096):
+ p1[j] = b'!'
+ p = ffi.gc(p, lib.free, 50*1024*1024)
+ x = X()
+ x.p = p
+ x.cyclic = x
+ del p, x
+
+def test_ffi_new_with_cycles():
+ # still another variant, with ffi.new()
+ if '__pypy__' not in sys.builtin_module_names:
+ py.test.skip("find a way to tweak the cyclic GC of CPython")
+ ffi = FFI()
+ ffi.cdef("")
+ lib = ffi.verify("")
+ class X(object):
+ pass
+ for i in range(2000):
+ p = ffi.new("char[]", 50*1024*1024) # 50 MB
+ for j in range(0, 50*1024*1024, 4096):
+ p[j] = b'!'
+ x = X()
+ x.p = p
+ x.cyclic = x
+ del p, x
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-12 15:49:18 +0000