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cdef class Info:
"""
Info
"""
def __cinit__(self):
self.ob_mpi = MPI_INFO_NULL
def __dealloc__(self):
if not (self.flags & PyMPI_OWNED): return
CHKERR( _del_Info(&self.ob_mpi) )
def __richcmp__(self, other, int op):
if not isinstance(self, Info): return NotImplemented
if not isinstance(other, Info): return NotImplemented
cdef Info s = self, o = other
if op == 2: return (s.ob_mpi == o.ob_mpi)
elif op == 3: return (s.ob_mpi != o.ob_mpi)
else: raise TypeError(mpistr("only '==' and '!='"))
def __nonzero__(self):
return self.ob_mpi != MPI_INFO_NULL
@classmethod
def Create(cls):
"""
Create a new, empty info object
"""
cdef Info info = cls()
CHKERR( MPI_Info_create(&info.ob_mpi) )
return info
def Free(self):
"""
Free a info object
"""
CHKERR( MPI_Info_free(&self.ob_mpi) )
def Dup(self):
"""
Duplicate an existing info object, creating a new object, with
the same (key, value) pairs and the same ordering of keys
"""
cdef Info info = Info()
CHKERR( MPI_Info_dup(self.ob_mpi, &info.ob_mpi) )
return info
def Get(self, key, int maxlen=-1):
"""
Retrieve the value associated with a key
"""
if maxlen < 0: maxlen = MPI_MAX_INFO_VAL
if maxlen > MPI_MAX_INFO_VAL: maxlen = MPI_MAX_INFO_VAL
cdef char *ckey = NULL
cdef char *cvalue = NULL
cdef bint flag = 0
key = asmpistr(key, &ckey, NULL)
cdef object tmp = allocate((maxlen+1), <void**>&cvalue)
CHKERR( MPI_Info_get(self.ob_mpi, ckey, maxlen, cvalue, &flag) )
cvalue[maxlen] = 0 # just in case
value = mpistr(cvalue) if flag else None
return (value, flag)
def Set(self, key, value):
"""
Add the (key, value) pair to info, and overrides the value if
a value for the same key was previously set
"""
cdef char *ckey = NULL
cdef char *cvalue = NULL
key = asmpistr(key, &ckey, NULL)
value = asmpistr(value, &cvalue, NULL)
CHKERR( MPI_Info_set(self.ob_mpi, ckey, cvalue) )
def Delete(self, key):
"""
Remove a (key, value) pair from info
"""
cdef char *ckey = NULL
key = asmpistr(key, &ckey, NULL)
CHKERR( MPI_Info_delete(self.ob_mpi, ckey) )
def Get_nkeys(self):
"""
Return the number of currently defined keys in info
"""
cdef int nkeys = 0
CHKERR( MPI_Info_get_nkeys(self.ob_mpi, &nkeys) )
return nkeys
def Get_nthkey(self, int n):
"""
Return the nth defined key in info. Keys are numbered in the
range [0, N) where N is the value returned by
`Info.Get_nkeys()`
"""
cdef char ckey[MPI_MAX_INFO_KEY+1]
CHKERR( MPI_Info_get_nthkey(self.ob_mpi, n, ckey) )
ckey[MPI_MAX_INFO_KEY] = 0 # just in case
return mpistr(ckey)
# Fortran Handle
# --------------
def py2f(self):
"""
"""
return MPI_Info_c2f(self.ob_mpi)
@classmethod
def f2py(cls, arg):
"""
"""
cdef Info info = cls()
info.ob_mpi = MPI_Info_f2c(arg)
return info
# Python mapping emulation
# ------------------------
def __len__(self):
if not self: return 0
return self.Get_nkeys()
def __contains__(self, key):
if not self: return False
cdef char *ckey = NULL
cdef int dummy = 0
cdef bint haskey = 0
key = asmpistr(key, &ckey, NULL)
CHKERR( MPI_Info_get_valuelen(self.ob_mpi, ckey, &dummy, &haskey) )
return haskey
def __iter__(self):
return iter(self.keys())
def __getitem__(self, key):
if not self: raise KeyError(key)
value, haskey = self.Get(key)
if not haskey: raise KeyError(key)
return value
def __setitem__(self, key, value):
if not self: raise KeyError(key)
self.Set(key, value)
def __delitem__(self, key):
if not self: raise KeyError(key)
if key not in self: raise KeyError(key)
self.Delete(key)
def get(self, key, default=None):
"""info get"""
if not self: return default
value, haskey = self.Get(key)
if not haskey: return default
return value
def keys(self):
"""info keys"""
if not self: return []
cdef int nkeys = self.Get_nkeys()
cdef list keys = []
for k from 0 <= k < nkeys:
key = self.Get_nthkey(k)
keys.append(key)
return keys
def values(self):
"""info values"""
if not self: return []
cdef int nkeys = self.Get_nkeys()
cdef list values = []
for k from 0 <= k < nkeys:
key = self.Get_nthkey(k)
val, _ = self.Get(key)
values.append(val)
return values
def items(self):
"""info items"""
if not self: return []
cdef int nkeys = self.Get_nkeys()
cdef list items = []
for k from 0 <= k < nkeys:
key = self.Get_nthkey(k)
val, _ = self.Get(key)
items.append((key, val))
return items
def update(self, other=(), **kwds):
"""info update"""
if not self: raise KeyError
if hasattr(other, "keys"):
for key in other.keys():
self.Set(key, other[key])
else:
for key, value in other:
self.Set(key, value)
for key, value in kwds.items():
self.Set(key, value)
def clear(self):
"""info clear"""
if not self: return None
cdef int k = 0, nkeys = self.Get_nkeys()
for k from 0 <= k < nkeys:
key = self.Get_nthkey(0)
self.Delete(key)
cdef Info __INFO_NULL__ = _new_Info(MPI_INFO_NULL)
# Predefined info handles
# -----------------------
INFO_NULL = __INFO_NULL__ #: Null info handle
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