public static string DumpArray(StringBuilder sb, NpyArray arr, bool repr)
{
// Equivalent to array_repr_builtin (arrayobject.c)
if (repr)
{
sb.Append("array(");
}
npy_intp totalElements = numpyAPI.NpyArray_Size(arr);
DumpArray(arr, sb, arr.dimensions, arr.strides, 0, 0, totalElements);
if (repr)
{
if (NpyDefs.IsExtended(arr.descr.type_num))
{
sb.AppendFormat(", '{0}{1}')", arr.ItemType, arr.ItemSize);
}
else
{
sb.AppendFormat(", '{0}')", arr.ItemType);
}
}
return(sb.ToString());
}
/// <summary>
/// Performs a generic reduce or accumulate operation on an input array.
/// A reduce operation reduces the number of dimensions of the input array
/// by one where accumulate does not. Accumulate stores in incremental
/// accumulated values in the extra dimension.
/// </summary>
/// <param name="arr">Input array</param>
/// <param name="indices">Used only for reduceat</param>
/// <param name="axis">Axis to reduce</param>
/// <param name="otype">Output type of the array</param>
/// <param name="outArr">Optional output array</param>
/// <param name="operation">Reduce/accumulate operation to perform</param>
/// <returns>Resulting array, either outArr or a new array</returns>
private Object GenericReduce(ndarray arr, ndarray indices, int axis,
dtype otype, ndarray outArr, GenericReductionOp operation)
{
if (signature() != null)
{
throw new RuntimeException("Reduction is not defined on ufunc's with signatures");
}
if (nin != 2)
{
throw new ArgumentException("Reduce/accumulate only supported for binary functions");
}
if (nout != 1)
{
throw new ArgumentException("Reduce/accumulate only supported for functions returning a single value");
}
if (arr.ndim == 0)
{
throw new ArgumentTypeException("Cannot reduce/accumulate a scalar");
}
if (arr.IsFlexible || (otype != null && NpyDefs.IsFlexible(otype.TypeNum)))
{
throw new ArgumentTypeException("Cannot perform reduce/accumulate with flexible type");
}
return(NpyCoreApi.GenericReduction(this, arr, indices,
outArr, axis, otype, operation));
}
internal static ndarray FromPythonScalar(object src, dtype descr)
{
int itemsize = descr.ElementSize;
NPY_TYPES type = descr.TypeNum;
if (itemsize == 0 && NpyDefs.IsExtended(type))
{
int n = PythonOps.Length(src);
if (type == NPY_TYPES.NPY_UNICODE)
{
n *= 4;
}
descr = new dtype(descr);
descr.ElementSize = n;
}
ndarray result = NpyCoreApi.AllocArray(descr, 0, null, false);
if (result.ndim > 0)
{
throw new ArgumentException("shape-mismatch on array construction");
}
result.Dtype.f.setitem(0, src, result.Array);
return(result);
}
public override string ToString()
{
string ret;
if (this.HasNames)
{
Object lst = this.descr;
ret = (lst != null) ? lst.ToString() : "<err>";
ret = String.Format("('{0}', {1})", this.str, this.descr);
}
else if (this.HasSubarray)
{
dtype b = @base;
if (!b.HasNames && !b.HasSubarray)
{
ret = String.Format("('{0}',{1})", b.ToString(), shape);
}
else
{
ret = String.Format("({0},{1})", b.ToString(), shape);
}
}
else if (NpyDefs.IsFlexible(this.TypeNum) || !this.IsNativeByteOrder)
{
ret = this.str;
}
else
{
ret = this.name;
}
return(ret);
}
public static void DumpArray(List <string> sb, NpyArray arr, bool repr)
{
// Equivalent to array_repr_builtin (arrayobject.c)
if (repr)
{
sb.Add("array(");
}
else
{
string ItemType = arr.ItemType.ToString().Substring("NPY_".Length);
if (string.IsNullOrEmpty(arr.Name))
{
sb.Add(string.Format("{0} \n", ItemType));
}
else
{
sb.Add(string.Format("{0}:Name({1}) \n", ItemType, arr.Name));
}
}
npy_intp totalElements = numpyAPI.NpyArray_Size(arr);
DumpArray(arr, sb, arr.dimensions, arr.strides, 0, 0, totalElements, 0, !repr);
if (repr)
{
if (NpyDefs.IsExtended(arr.descr.type_num))
{
sb.Add(string.Format(", '{0}{1}')", arr.ItemType, arr.ItemSize));
}
else
{
sb.Add(String.Format(", '{0}')", arr.ItemType));
}
}
}
private static void ConvertSingleIndex(ndarray arr, Object arg, NpyIndexes indexes, int index)
{
if (arg == null)
{
indexes.AddNewAxis();
}
else if (arg is string && (string)arg == "...")
{
indexes.AddEllipsis();
}
else if (arg is Ellipsis)
{
indexes.AddEllipsis();
}
else if (arg is CSharpTuple)
{
indexes.AddCSharpTuple((CSharpTuple)arg);
}
else if (arg is bool)
{
indexes.AddIndex((bool)arg);
}
else if (arg is int)
{
indexes.AddIndex((int)arg);
}
else if (arg is BigInteger)
{
BigInteger bi = (BigInteger)arg;
npy_intp lval = (npy_intp)bi;
indexes.AddIndex(lval);
}
else if (arg is ISlice)
{
indexes.AddIndex((ISlice)arg);
}
else if (arg is string)
{
indexes.AddIndex(arr, (string)arg, index);
}
else
{
ndarray array_arg = null;
if (arg.GetType().IsArray)
{
dynamic arr1 = arg;
if (arr1[0] is ndarray)
{
}
else
{
array_arg = np.array(new VoidPtr(arr1), null);
}
}
else
{
array_arg = arg as ndarray;
}
if (array_arg == null && arg is IEnumerable <object> )
{
array_arg = np.FromIEnumerable((IEnumerable <object>)arg, null, false, 0, 0);
}
if (array_arg == null && arg is IEnumerable <npy_intp> )
{
var arr1 = arg as IEnumerable <npy_intp>;
array_arg = np.array(arr1.ToArray(), null);
}
// Boolean scalars
if (array_arg != null &&
array_arg.ndim == 0 &&
NpyDefs.IsBool(array_arg.TypeNum))
{
indexes.AddIndex(Convert.ToBoolean(array_arg[0]));
}
// Integer scalars
else if (array_arg != null &&
array_arg.ndim == 0 &&
NpyDefs.IsInteger(array_arg.TypeNum))
{
try
{
indexes.AddIndex((npy_intp)Convert.ToInt64(array_arg[0]));
}
catch (Exception e)
{
throw new IndexOutOfRangeException(e.Message);
}
}
else if (array_arg != null)
{
// Arrays must be either boolean or integer.
if (NpyDefs.IsInteger(array_arg.TypeNum))
{
indexes.AddIntpArray(array_arg);
}
else if (NpyDefs.IsBool(array_arg.TypeNum))
{
indexes.AddBoolArray(array_arg);
}
else
{
throw new IndexOutOfRangeException("arrays used as indices must be of integer (or boolean) type.");
}
}
else if (arg is IEnumerable <Object> )
{
// Other sequences we convert to an intp array
indexes.AddIntpArray(arg);
}
else if (arg is IConvertible)
{
#if NPY_INTP_64
indexes.AddIndex((npy_intp)Convert.ToInt64(arg));
#else
indexes.AddIndex((npy_intp)Convert.ToInt32(arg));
#endif
}
else
{
throw new ArgumentException(String.Format("Argument '{0}' is not a valid index.", arg));
}
}
}
/// <summary>
/// Builds an array from a sequence of objects. The elements of the sequence
/// can also be sequences in which case this function recursively walks the
/// nested sequences and builds an n dimentional array.
///
/// IronPython tuples and lists work as sequences.
/// </summary>
/// <param name="src">Input sequence</param>
/// <param name="descr">Desired array element type or null to determine automatically</param>
/// <param name="fortran">True if array should be Fortran layout, false for C</param>
/// <param name="minDepth"></param>
/// <param name="maxDepth"></param>
/// <returns>New array instance</returns>
internal static ndarray FromIEnumerable(IEnumerable <Object> src, dtype descr,
bool fortran, int minDepth, int maxDepth)
{
ndarray result = null;
if (descr == null)
{
descr = FindArrayType(src, null, NpyDefs.NPY_MAXDIMS);
}
int itemsize = descr.ElementSize;
NPY_TYPES type = descr.TypeNum;
bool checkIt = (descr.Type != NPY_TYPECHAR.NPY_CHARLTR);
bool stopAtString =
type != NPY_TYPES.NPY_STRING ||
descr.Type == NPY_TYPECHAR.NPY_STRINGLTR;
bool stopAtTuple =
type == NPY_TYPES.NPY_VOID &&
(descr.HasNames || descr.HasSubarray);
int numDim = DiscoverDepth(src, NpyDefs.NPY_MAXDIMS + 1, stopAtString, stopAtTuple);
if (numDim == 0)
{
return(FromPythonScalar(src, descr));
}
else
{
if (maxDepth > 0 && type == NPY_TYPES.NPY_OBJECT &&
numDim > maxDepth)
{
numDim = maxDepth;
}
if (maxDepth > 0 && numDim > maxDepth ||
minDepth > 0 && numDim < minDepth)
{
throw new ArgumentException("Invalid number of dimensions.");
}
npy_intp[] dims = new npy_intp[numDim];
DiscoverDimensions(src, numDim, dims, 0, checkIt);
if (descr.Type == NPY_TYPECHAR.NPY_CHARLTR &&
numDim > 0 && dims[numDim - 1] == 1)
{
numDim--;
}
if (itemsize == 0 && NpyDefs.IsExtended(descr.TypeNum))
{
itemsize = DiscoverItemsize(src, numDim, 0);
if (descr.TypeNum == NPY_TYPES.NPY_UNICODE)
{
itemsize *= 4;
}
descr = new dtype(descr);
descr.ElementSize = itemsize;
}
result = NpyCoreApi.AllocArray(descr, numDim, dims, fortran);
AssignToArray(src, result);
}
return(result);
}
private void FindScalarInfo()
{
ScalarInfo info = null;
NPY_TYPES type = TypeNum;
if (NpyDefs.IsSigned(type))
{
switch (ElementSize)
{
case 1:
info = ScalarInfo.Make <ScalarInt8>();
break;
case 2:
info = ScalarInfo.Make <ScalarInt16>();
break;
case 4:
info = (type == NpyCoreApi.TypeOf_Int32) ?
ScalarInfo.Make <ScalarInt32>() : ScalarInfo.Make <ScalarIntC>();
break;
case 8:
info = (type == NpyCoreApi.TypeOf_Int64) ?
ScalarInfo.Make <ScalarInt64>() : ScalarInfo.Make <ScalarLongLong>();
break;
}
}
else if (NpyDefs.IsUnsigned(type))
{
switch (ElementSize)
{
case 1:
info = ScalarInfo.Make <ScalarUInt8>();
break;
case 2:
info = ScalarInfo.Make <ScalarUInt16>();
break;
case 4:
info = (type == NpyCoreApi.TypeOf_UInt32) ?
ScalarInfo.Make <ScalarUInt32>() : ScalarInfo.Make <ScalarUIntC>();
break;
case 8:
info = (type == NpyCoreApi.TypeOf_UInt64) ?
ScalarInfo.Make <ScalarUInt64>() : ScalarInfo.Make <ScalarULongLong>();
break;
}
}
else if (NpyDefs.IsFloat(type))
{
switch (ElementSize)
{
case 4:
info = ScalarInfo.Make <ScalarFloat32>();
break;
case 8:
info = ScalarInfo.Make <ScalarFloat64>();
break;
}
}
else if (NpyDefs.IsComplex(type))
{
switch (ElementSize)
{
case 8:
info = ScalarInfo.Make <ScalarComplex64>();
break;
case 16:
info = ScalarInfo.Make <ScalarComplex128>();
break;
}
}
else if (type == NPY_TYPES.NPY_BOOL)
{
info = ScalarInfo.Make <ScalarBool>();
}
else if (type == NPY_TYPES.NPY_VOID)
{
info = ScalarInfo.Make <ScalarVoid>();
}
else if (type == NPY_TYPES.NPY_OBJECT)
{
info = ScalarInfo.Make <ScalarObject>();
}
if (info == null)
{
info = new ScalarInfo();
}
scalarInfo = info;
}