# -*- python -*-
# See LICENSE file for copyright and license details.
cimport cython
from posix.unistd cimport gid_t
from libc.string cimport strerror as c_strerror
cdef extern gid_t libgamma_group_gid_get() nogil
cdef extern void libgamma_group_gid_set(gid_t) nogil
'''
Group that the user needs to be a member of if
`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned
'''
cdef extern const char *libgamma_group_name_get() nogil
cdef extern void libgamma_group_name_set(const char *) nogil
'''
Group that the user needs to be a member of if
`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
`NULL` if the name of the group `libgamma_group_gid`
cannot be determined
'''
cdef extern void libgamma_perror(const char *name, int error_code) nogil
'''
Prints an error to stderr in a `perror` fashion,
however this function will not translate the `libgamma`
errors into human-readable strings, it will simply
print the name of the error. If the value `error_code`
is the value of `LIBGAMMA_ERRNO_SET`, `perror` will be
used to print the current error stored in `errno`.
If `error_code` is non-negative (an `errno` value`), that
value will be stored in `errno` and `perror` will be
used to print it. Additionally, if the `error_code` is
the value of `LIBGAMMA_DEVICE_REQUIRE_GROUP` the
required group will be printed with its numerical value
and, if known, its name.
@param name The text to add at the beginning
@param value The error code, may be an `errno` value
'''
cdef extern const char *libgamma_name_of_error(int value) nogil
'''
Returns the name of the definition associated with a `libgamma` error code
@param value The error code
@return The name of the definition associated with the error code,
`NULL` if the error code does not exist. The return string
should not be `free`:d.
'''
cdef extern int libgamma_value_of_error(const char *name) nogil
'''
Return the value of a `libgamma` error definition refered to by name
@param name The name of the definition associated with the error code
@return The error code, zero if the name does is `NULL`
or does not refer to a `libgamma` error
'''
def libgamma_native_get_group_gid() -> int:
'''
Getter
Group that the user needs to be a member of if
`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned
'''
return int(libgamma_group_gid_get())
def libgamma_native_set_group_gid(gid : int):
'''
Setter
Group that the user needs to be a member of if
`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned
'''
libgamma_group_gid_set(<int>gid)
def libgamma_native_get_group_name() -> str:
'''
Getter
Group that the user needs to be a member of if
`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
`None` if the name of the group `libgamma_group_gid`
cannot be determined
'''
cdef const char *group_name
cdef bytes bs
group_name = libgamma_group_name_get()
if group_name is NULL:
return None
bs = group_name
return bs.decode('utf-8', 'strict')
def libgamma_native_set_group_name(name : str):
'''
Setter
Group that the user needs to be a member of if
`LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
`None` if the name of the group `libgamma_group_gid`
cannot be determined
'''
cdef const char *group_name
cdef bytes bs
if name is None:
libgamma_group_name_set(<char *>NULL)
return
bs = name.encode('utf-8') + bytes([0])
group_name = bs
libgamma_group_name_set(group_name)
def libgamma_native_perror(name : str, error_code : int):
'''
Prints an error to stderr in a `perror` fashion,
however this function will not translate the `libgamma`
errors into human-readable strings, it will simply
print the name of the error. If the value `error_code`
is the value of `LIBGAMMA_ERRNO_SET`, `perror` will be
used to print the current error stored in `errno`.
If `error_code` is non-negative (an `errno` value`), that
value will be stored in `errno` and `perror` will be
used to print it. Additionally, if the `error_code` is
the value of `LIBGAMMA_DEVICE_REQUIRE_GROUP` the
required group will be printed with its numerical value
and, if known, its name.
@param name The text to add at the beginning
@param value The error code, may be an `errno` value
'''
cdef bytes bs
bs = name.encode('utf-8') + bytes([0])
libgamma_perror(bs, <int>error_code)
def libgamma_native_name_of_error(value : int) -> str:
'''
Returns the name of the definition associated with a `libgamma` error code
@param value The error code
@return The name of the definition associated with the error code,
`None` if the error code does not exist
'''
cdef const char *name
cdef bytes bs
name = libgamma_name_of_error(<int>value)
if name is NULL:
return None
bs = name
return bs.decode('utf-8', 'strict')
def libgamma_native_value_of_error(name : str) -> int:
'''
Return the value of a `libgamma` error definition refered to by name
@param name The name of the definition associated with the error code
@return The error code, zero if the name is `None`,
or does not refer to a `libgamma` error
'''
cdef bytes bs
if name is None:
return 0
bs = name.encode('utf-8') + bytes([0])
return int(libgamma_value_of_error(bs))
def strerror(error : int) -> str:
'''
Get a textual description of an error
@param error The number of the error
@return The description of the error
'''
cdef const char *text
cdef bytes bs
text = c_strerror(<int>error)
bs = text
return bs.decode('utf-8', 'strict')
