def test_vararg(self):
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stderr' in the lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int fprintf(void *, const char *format, ...);
void *stderr;
""")
ffi.C = ffi.dlopen(None)
with FdWriteCapture() as fd:
ffi.C.fprintf(ffi.C.stderr, b"hello with no arguments\n")
ffi.C.fprintf(ffi.C.stderr, b"hello, %s!\n",
ffi.new("char[]", b"world"))
ffi.C.fprintf(ffi.C.stderr, ffi.new("char[]", b"hello, %s!\n"),
ffi.new("char[]", b"world2"))
ffi.C.fprintf(ffi.C.stderr,
b"hello int %d long %ld long long %lld\n",
ffi.cast("int", 42), ffi.cast("long", 84),
ffi.cast("long long", 168))
ffi.C.fprintf(ffi.C.stderr, b"hello %p\n", ffi.NULL)
res = fd.getvalue()
assert res == (b"hello with no arguments\n"
b"hello, world!\n"
b"hello, world2!\n"
b"hello int 42 long 84 long long 168\n"
b"hello (nil)\n")
def test_function_pointer(self):
ffi = FFI(backend=self.Backend())
def cb(charp):
assert repr(charp).startswith("<cdata 'char *' 0x")
return 42
fptr = ffi.callback("int(*)(const char *txt)", cb)
assert fptr != ffi.callback("int(*)(const char *)", cb)
assert repr(fptr) == "<cdata 'int(*)(char *)' calling %r>" % (cb,)
res = fptr(b"Hello")
assert res == 42
#
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stderr' in the lib")
ffi.cdef("""
int fputs(const char *, void *);
void *stderr;
""")
ffi.C = ffi.dlopen(None)
fptr = ffi.cast("int(*)(const char *txt, void *)", ffi.C.fputs)
assert fptr == ffi.C.fputs
assert repr(fptr).startswith("<cdata 'int(*)(char *, void *)' 0x")
with FdWriteCapture() as fd:
fptr(b"world\n", ffi.C.stderr)
res = fd.getvalue()
assert res == b'world\n'
def test_vararg(self):
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stderr' in the lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int fprintf(void *, const char *format, ...);
void *stderr;
""")
ffi.C = ffi.dlopen(None)
with FdWriteCapture() as fd:
ffi.C.fprintf(ffi.C.stderr, b"hello with no arguments\n")
ffi.C.fprintf(ffi.C.stderr,
b"hello, %s!\n", ffi.new("char[]", b"world"))
ffi.C.fprintf(ffi.C.stderr,
ffi.new("char[]", b"hello, %s!\n"),
ffi.new("char[]", b"world2"))
ffi.C.fprintf(ffi.C.stderr,
b"hello int %d long %ld long long %lld\n",
ffi.cast("int", 42),
ffi.cast("long", 84),
ffi.cast("long long", 168))
ffi.C.fprintf(ffi.C.stderr, b"hello %p\n", ffi.NULL)
res = fd.getvalue()
assert res == (b"hello with no arguments\n"
b"hello, world!\n"
b"hello, world2!\n"
b"hello int 42 long 84 long long 168\n"
b"hello (nil)\n")
def test_function_pointer(self):
ffi = FFI(backend=self.Backend())
def cb(charp):
assert repr(charp).startswith("<cdata 'char *' 0x")
return 42
fptr = ffi.callback("int(*)(const char *txt)", cb)
assert fptr != ffi.callback("int(*)(const char *)", cb)
assert repr(fptr) == "<cdata 'int(*)(char *)' calling %r>" % (cb, )
res = fptr(b"Hello")
assert res == 42
#
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stderr' in the lib")
ffi.cdef("""
int fputs(const char *, void *);
void *stderr;
""")
ffi.C = ffi.dlopen(None)
fptr = ffi.cast("int(*)(const char *txt, void *)", ffi.C.fputs)
assert fptr == ffi.C.fputs
assert repr(fptr).startswith("<cdata 'int(*)(char *, void *)' 0x")
with FdWriteCapture() as fd:
fptr(b"world\n", ffi.C.stderr)
res = fd.getvalue()
assert res == b'world\n'
def test_must_specify_type_of_vararg(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int printf(const char *format, ...);
""")
ffi.C = ffi.dlopen(None)
e = py.test.raises(TypeError, ffi.C.printf, b"hello %d\n", 42)
assert str(e.value) == ("argument 2 passed in the variadic part "
"needs to be a cdata object (got int)")
def test_strchr(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
char *strchr(const char *s, int c);
""")
ffi.C = ffi.dlopen(None)
p = ffi.new("char[]", b"hello world!")
q = ffi.C.strchr(p, ord('w'))
assert ffi.string(q) == b"world!"
def test_strchr(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
char *strchr(const char *s, int c);
""")
ffi.C = ffi.dlopen(None)
p = ffi.new("char[]", b"hello world!")
q = ffi.C.strchr(p, ord('w'))
assert ffi.string(q) == b"world!"
def test_passing_array(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int strlen(char[]);
""")
ffi.C = ffi.dlopen(None)
p = ffi.new("char[]", b"hello")
res = ffi.C.strlen(p)
assert res == 5
def test_must_specify_type_of_vararg(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int printf(const char *format, ...);
""")
ffi.C = ffi.dlopen(None)
e = py.test.raises(TypeError, ffi.C.printf, b"hello %d\n", 42)
assert str(e.value) == ("argument 2 passed in the variadic part "
"needs to be a cdata object (got int)")
def test_passing_array(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int strlen(char[]);
""")
ffi.C = ffi.dlopen(None)
p = ffi.new("char[]", b"hello")
res = ffi.C.strlen(p)
assert res == 5
def test_function_has_a_c_type(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int puts(const char *);
""")
ffi.C = ffi.dlopen(None)
fptr = ffi.C.puts
assert ffi.typeof(fptr) == ffi.typeof("int(*)(const char*)")
if self.Backend is CTypesBackend:
assert repr(fptr).startswith("<cdata 'int puts(char *)' 0x")
def test_function_has_a_c_type(self):
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int puts(const char *);
""")
ffi.C = ffi.dlopen(None)
fptr = ffi.C.puts
assert ffi.typeof(fptr) == ffi.typeof("int(*)(const char*)")
if self.Backend is CTypesBackend:
assert repr(fptr).startswith("<cdata 'int puts(char *)' 0x")
def test_fputs_without_const(self):
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stderr' in the lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int fputs(char *, void *);
void *stderr;
""")
ffi.C = ffi.dlopen(None)
ffi.C.fputs # fetch before capturing, for easier debugging
with FdWriteCapture() as fd:
ffi.C.fputs(b"hello\n", ffi.C.stderr)
ffi.C.fputs(b" world\n", ffi.C.stderr)
res = fd.getvalue()
assert res == b'hello\n world\n'
def test_fputs_without_const(self):
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stderr' in the lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int fputs(char *, void *);
void *stderr;
""")
ffi.C = ffi.dlopen(None)
ffi.C.fputs # fetch before capturing, for easier debugging
with FdWriteCapture() as fd:
ffi.C.fputs(b"hello\n", ffi.C.stderr)
ffi.C.fputs(b" world\n", ffi.C.stderr)
res = fd.getvalue()
assert res == b'hello\n world\n'
def test_function_with_struct_argument(self):
if sys.platform == 'win32':
py.test.skip("no 'inet_ntoa'")
if (self.Backend is CTypesBackend and
'__pypy__' in sys.builtin_module_names):
py.test.skip("ctypes limitation on pypy")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
struct in_addr { unsigned int s_addr; };
char *inet_ntoa(struct in_addr in);
""")
ffi.C = ffi.dlopen(None)
ina = ffi.new("struct in_addr *", [0x04040404])
a = ffi.C.inet_ntoa(ina[0])
assert ffi.string(a) == b'4.4.4.4'
def test_function_with_struct_argument(self):
if sys.platform == 'win32':
py.test.skip("no 'inet_ntoa'")
if (self.Backend is CTypesBackend
and '__pypy__' in sys.builtin_module_names):
py.test.skip("ctypes limitation on pypy")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
struct in_addr { unsigned int s_addr; };
char *inet_ntoa(struct in_addr in);
""")
ffi.C = ffi.dlopen(None)
ina = ffi.new("struct in_addr *", [0x04040404])
a = ffi.C.inet_ntoa(ina[0])
assert ffi.string(a) == b'4.4.4.4'
def test_write_variable(self):
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stdout' in the lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int puts(const char *);
void *stdout, *stderr;
""")
ffi.C = ffi.dlopen(None)
pout = ffi.C.stdout
perr = ffi.C.stderr
assert repr(pout).startswith("<cdata 'void *' 0x")
assert repr(perr).startswith("<cdata 'void *' 0x")
with FdWriteCapture(2) as fd: # capturing stderr
ffi.C.stdout = perr
try:
ffi.C.puts(b"hello!") # goes to stdout, which is equal to stderr now
finally:
ffi.C.stdout = pout
res = fd.getvalue()
assert res == b"hello!\n"
def test_write_variable(self):
if not sys.platform.startswith('linux'):
py.test.skip("probably no symbol 'stdout' in the lib")
ffi = FFI(backend=self.Backend())
ffi.cdef("""
int puts(const char *);
void *stdout, *stderr;
""")
ffi.C = ffi.dlopen(None)
pout = ffi.C.stdout
perr = ffi.C.stderr
assert repr(pout).startswith("<cdata 'void *' 0x")
assert repr(perr).startswith("<cdata 'void *' 0x")
with FdWriteCapture(2) as fd: # capturing stderr
ffi.C.stdout = perr
try:
ffi.C.puts(
b"hello!") # goes to stdout, which is equal to stderr now
finally:
ffi.C.stdout = pout
res = fd.getvalue()
assert res == b"hello!\n"
int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result);
int openat(int dirfd, const char *pathname, int flags);
DIR *fdopendir(int fd);
int closedir(DIR *dirp);
static const int DT_DIR;
"""
)
ffi.C = ffi.verify(
"""
#ifndef _ATFILE_SOURCE
# define _ATFILE_SOURCE
#endif
#ifndef _BSD_SOURCE
# define _BSD_SOURCE
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <dirent.h>
"""
)
def walk(basefd, path):
print "{", path
dirfd = ffi.C.openat(basefd, path, 0)
if dirfd < 0:
# error in openat()
return
dir = ffi.C.fdopendir(dirfd)
struct dirent {
ino_t d_ino; /* inode number */
off_t d_off; /* offset to the next dirent */
unsigned short d_reclen; /* length of this record */
unsigned char d_type; /* type of file; not supported
by all file system types */
char d_name[256]; /* filename */
};
int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result);
int openat(int dirfd, const char *pathname, int flags);
DIR *fdopendir(int fd);
int closedir(DIR *dirp);
""")
ffi.C = ffi.dlopen(None)
def walk(basefd, path):
print '{', path
dirfd = ffi.C.openat(basefd, path, 0)
if dirfd < 0:
# error in openat()
return
dir = ffi.C.fdopendir(dirfd)
dirent = ffi.new("struct dirent *")
result = ffi.new("struct dirent **")
while True:
if ffi.C.readdir_r(dir, dirent, result):
# error in readdir_r()
struct dirent {
ino_t d_ino; /* inode number */
off_t d_off; /* offset to the next dirent */
unsigned short d_reclen; /* length of this record */
unsigned char d_type; /* type of file; not supported
by all file system types */
char d_name[256]; /* filename */
};
int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result);
int openat(int dirfd, const char *pathname, int flags);
DIR *fdopendir(int fd);
int closedir(DIR *dirp);
""")
ffi.C = ffi.dlopen(None)
def walk(basefd, path):
print '{', path
dirfd = ffi.C.openat(basefd, path, 0)
if dirfd < 0:
# error in openat()
return
dir = ffi.C.fdopendir(dirfd)
dirent = ffi.new("struct dirent *")
result = ffi.new("struct dirent **")
while True:
if ffi.C.readdir_r(dir, dirent, result):
# error in readdir_r()
break
};
int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result);
int openat(int dirfd, const char *pathname, int flags);
DIR *fdopendir(int fd);
int closedir(DIR *dirp);
static const int DT_DIR;
""")
ffi.C = ffi.verify("""
#ifndef _ATFILE_SOURCE
# define _ATFILE_SOURCE
#endif
#ifndef _BSD_SOURCE
# define _BSD_SOURCE
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <dirent.h>
""")
def walk(basefd, path):
print '{', path
dirfd = ffi.C.openat(basefd, path, 0)
if dirfd < 0:
# error in openat()
return
dir = ffi.C.fdopendir(dirfd)
dirent = ffi.new("struct dirent *")