Python CFFI 不会将 typedef 从 cdef() 复制到生成的 C 文件中
Python CFFI doesn't copy typedef from cdef() into generated C file
我正在将生成的头文件输入 ffi.cdef()
,开头有一堆这样的 typedef:
typedef enum
{
LE_GPIO_EDGE_NONE = 0,
LE_GPIO_EDGE_RISING = 1,
// ...etc...
}
le_gpio_Edge_t;
然后我尝试编译它:
with open(args.api_name + '_cdef.h') as f:
cdef = f.read()
ffibuilder.cdef(cdef)
if __name__ == "__main__":
ffibuilder.compile(verbose=True)
但是它生成的 C 代码是这样的:
static int _cffi_const_LE_GPIO_EDGE_RISING(unsigned long long *o)
{
int n = (LE_GPIO_EDGE_RISING) <= 0;
*o = (unsigned long long)((LE_GPIO_EDGE_RISING) | 0); /* check that LE_GPIO_EDGE_RISING is an integer */
return n;
}
这会导致构建失败,因为符号 LE_GPIO_EDGE_RISING
未在任何地方定义(或在其他任何地方引用)
le_gpio.c: In function ‘_cffi_const_LE_GPIO_EDGE_RISING’:
le_gpio.c:494:12: error: ‘LE_GPIO_EDGE_RISING’ undeclared (first use in this function)
int n = (LE_GPIO_EDGE_RISING) <= 0;
方法ffibuilder.set_source
似乎将类型定义放置到生成的C 文件中。
import cffi
ffibuilder = cffi.FFI()
tdef = r"""
typedef enum
{
LE_GPIO_EDGE_NONE = 0,
LE_GPIO_EDGE_RISING = 1,
// ...etc...
} le_gpio_Edge_t;
"""
ffibuilder.set_source("package._foo", tdef)
ffibuilder.cdef(tdef)
if __name__ == "__main__":
ffibuilder.compile(verbose=True)
参见 documentation for c_header_source
argument of set_source
。
我正在将生成的头文件输入 ffi.cdef()
,开头有一堆这样的 typedef:
typedef enum
{
LE_GPIO_EDGE_NONE = 0,
LE_GPIO_EDGE_RISING = 1,
// ...etc...
}
le_gpio_Edge_t;
然后我尝试编译它:
with open(args.api_name + '_cdef.h') as f:
cdef = f.read()
ffibuilder.cdef(cdef)
if __name__ == "__main__":
ffibuilder.compile(verbose=True)
但是它生成的 C 代码是这样的:
static int _cffi_const_LE_GPIO_EDGE_RISING(unsigned long long *o)
{
int n = (LE_GPIO_EDGE_RISING) <= 0;
*o = (unsigned long long)((LE_GPIO_EDGE_RISING) | 0); /* check that LE_GPIO_EDGE_RISING is an integer */
return n;
}
这会导致构建失败,因为符号 LE_GPIO_EDGE_RISING
未在任何地方定义(或在其他任何地方引用)
le_gpio.c: In function ‘_cffi_const_LE_GPIO_EDGE_RISING’:
le_gpio.c:494:12: error: ‘LE_GPIO_EDGE_RISING’ undeclared (first use in this function)
int n = (LE_GPIO_EDGE_RISING) <= 0;
方法ffibuilder.set_source
似乎将类型定义放置到生成的C 文件中。
import cffi
ffibuilder = cffi.FFI()
tdef = r"""
typedef enum
{
LE_GPIO_EDGE_NONE = 0,
LE_GPIO_EDGE_RISING = 1,
// ...etc...
} le_gpio_Edge_t;
"""
ffibuilder.set_source("package._foo", tdef)
ffibuilder.cdef(tdef)
if __name__ == "__main__":
ffibuilder.compile(verbose=True)
参见 documentation for c_header_source
argument of set_source
。