本文整理汇总了Python中math.h方法的典型用法代码示例。如果您正苦于以下问题:Python math.h方法的具体用法?Python math.h怎么用?Python math.h使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类math
的用法示例。
在下文中一共展示了math.h方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_abs_fallback_expr
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_abs_fallback_expr():
expr = ast.AbsExpr(ast.NumVal(-2.0))
interpreter = CInterpreter()
interpreter.abs_function_name = NotImplemented
expected_code = """
#include <math.h>
double score(double * input) {
double var0;
double var1;
var1 = -2.0;
if ((var1) < (0)) {
var0 = (0.0) - (var1);
} else {
var0 = var1;
}
return var0;
}
"""
assert_code_equal(interpreter.interpret(expr), expected_code)
示例2: test_extension_object
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_extension_object(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*7%s*/' % self + '''
#include <math.h>
#ifndef TEST_EXTENSION_OBJECT
# error "define_macros missing"
#endif
'''
lib = ffi.verify(csrc, define_macros=[('TEST_EXTENSION_OBJECT', '1')],
force_generic_engine=self.generic,
libraries=[self.lib_m])
assert lib.sin(12.3) == math.sin(12.3)
v = ffi.verifier
ext = v.get_extension()
assert 'distutils.extension.Extension' in str(ext.__class__) or \
'setuptools.extension.Extension' in str(ext.__class__)
assert ext.sources == [maybe_relative_path(v.sourcefilename)]
assert ext.name == v.get_module_name()
assert ext.define_macros == [('TEST_EXTENSION_OBJECT', '1')]
示例3: test_opaque_integer_as_function_result
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
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")
示例4: test_take_and_return_partial_structs
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
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
示例5: test_FILE_stored_explicitly
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
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"
示例6: test_ptr_to_opaque
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
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
示例7: test_implicit_unicode_on_windows
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_implicit_unicode_on_windows():
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 '\'
示例8: test_errno_working_even_with_pypys_jit
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
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
示例9: test_unicode_libraries
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_unicode_libraries():
try:
unicode
except NameError:
py.test.skip("for python 2.x")
#
import math
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'
ffi = FFI()
ffi.cdef(unicode("float sin(double); double cos(double);"))
lib = verify(ffi, 'test_math_sin_unicode', unicode('#include <math.h>'),
libraries=[unicode(lib_m)])
assert lib.cos(1.43) == math.cos(1.43)
示例10: setUp
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def setUp(self):
"""NOTE this is called once for each test* method
(it is not called once per class).
FIXME This is slightly inefficient as it is called *way* more times than it needs to be.
"""
header_str = """
#include <math.h>
#define sin_plus_y(x,y) (sin(x) + (y))
"""
if sys.platform == "win32":
# pick something from %windir%\system32\msvc*dll that include stdlib
libraries = ["msvcrt.dll"]
libraries = ["msvcrt"]
elif sys.platform.startswith("linux"):
libraries = ["libm.so.6"]
else:
libraries = ["libc"]
self.module, output = ctypesgentest.test(header_str, libraries=libraries, all_headers=True)
示例11: c_headers
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def c_headers(self, c_compiler):
l = ['<math.h>']
# These includes are needed by Scalar and TensorType,
# we declare them here and they will be re-used by TensorType
l.append('<numpy/arrayobject.h>')
l.append('<numpy/arrayscalars.h>')
if config.lib.amdlibm and c_compiler.supports_amdlibm:
l += ['<amdlibm.h>']
return l
示例12: test_write_source
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_write_source(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
v.write_source()
with open(v.sourcefilename, 'r') as f:
data = f.read()
assert csrc in data
示例13: test_write_source_explicit_filename
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_write_source_explicit_filename(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
v.sourcefilename = filename = str(udir.join('write_source.c'))
v.write_source()
assert filename == v.sourcefilename
with open(filename, 'r') as f:
data = f.read()
assert csrc in data
示例14: test_write_source_to_file_obj
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_write_source_to_file_obj(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
try:
from StringIO import StringIO
except ImportError:
from io import StringIO
f = StringIO()
v.write_source(file=f)
assert csrc in f.getvalue()
示例15: test_compile_module
# 需要导入模块: import math [as 别名]
# 或者: from math import h [as 别名]
def test_compile_module(self):
ffi = FFI()
ffi.cdef("double sin(double x);")
csrc = '/*hi there %s!*/\n#include <math.h>\n' % self
v = Verifier(ffi, csrc, force_generic_engine=self.generic,
libraries=[self.lib_m])
v.compile_module()
assert v.get_module_name().startswith('_cffi_')
if v.generates_python_module():
mod = imp.load_dynamic(v.get_module_name(), v.modulefilename)
assert hasattr(mod, '_cffi_setup')