| 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 |
