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Diffstat (limited to 'testing/cffi1/test_verify1.py')
| -rw-r--r-- | testing/cffi1/test_verify1.py | 2359 |
1 files changed, 0 insertions, 2359 deletions
diff --git a/testing/cffi1/test_verify1.py b/testing/cffi1/test_verify1.py deleted file mode 100644 index 33244cc..0000000 --- a/testing/cffi1/test_verify1.py +++ /dev/null @@ -1,2359 +0,0 @@ -import os, sys, math, py -import pytest -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, extra_compile_args -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'] - -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(["static %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(["static %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') - with pytest.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 - with pytest.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("static int foo(void);\n" - "static 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("static 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("static int foo(int);\n" - "static 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" - "static int foo(int);\n" - "static 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("static int (*cb)(int);\n" - "static int foo(int);\n" - "static 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" - "static mycallback_t *cb;\n" - "static int foo(int);\n" - "static 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" - "static 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; - } - static 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); static _Bool (*foop)(_Bool);") - lib = ffi.verify(""" - struct foo_s { _Bool x; }; - int foo(int arg) { - return !arg; - } - _Bool _foofunc(_Bool x) { - return !x; - } - static _Bool (*foop)(_Bool) = _foofunc; - """) - p = ffi.new("struct foo_s *") - p.x = 1 - assert p.x is True - with pytest.raises(OverflowError): - p.x = -1 - with pytest.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 *") - with pytest.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); extern 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("extern 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("extern 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("extern 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(""" - static 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("""extern 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("""extern 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 = """ - extern int xvalue; - extern long long ivalue, rvalue; - extern float fvalue; - extern double dvalue; - extern 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("extern 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 - with pytest.raises(ffi.error) as e: - 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("extern 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 |