Change license to ISC, change style, improve makefile1.1.3

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 188 insertions, 0 deletions

diff --git a/libgamma_native_error.posix.pyx b/libgamma_native_error.posix.pyx
new file mode 100644
index 0000000..0370eb4
--- /dev/null
+++ b/libgamma_native_error.posix.pyx
@@ -0,0 +1,188 @@
+# -*- 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')