LowLevelViews.cxx File Reference

#include "CPyCppyy.h"
#include "LowLevelViews.h"
#include "Converters.h"
#include "CustomPyTypes.h"
#include "PyStrings.h"
#include <map>
#include <assert.h>
#include <string.h>
#include <limits.h>

Namespaces
namespace	CPyCppyy

Macros
#define	ADJUST_PTR(ptr, suboffsets, dim)
#define	CPPYY_IMPL_VIEW_CREATOR(type)
#define	CPPYY_RET_W_CREATOR(type, fname)
#define	CPYCPPYY_LL_FLAG_GETSET(name, flag, doc)
#define	HAVE_PTR(suboffsets, dim)
#define	HAVE_SUBOFFSETS_IN_LAST_DIM(view)

Functions
static void	copy_base (const Py_ssize_t *shape, Py_ssize_t itemsize, char *dptr, const Py_ssize_t *dstrides, const Py_ssize_t *dsuboffsets, char *sptr, const Py_ssize_t *sstrides, const Py_ssize_t *ssuboffsets, char *mem)
static int	copy_single (Py_buffer *dest, Py_buffer *src)
template<typename T>
static CPyCppyy::LowLevelView *	CreateLowLevelViewT (T **address, CPyCppyy::cdims_t shape, const char *format=nullptr, const char *name=nullptr)
template<typename T>
static CPyCppyy::LowLevelView *	CreateLowLevelViewT (T *address, CPyCppyy::cdims_t shape, const char *format=nullptr, const char *name=nullptr, Py_ssize_t itemsize=-1)
static bool	equiv_shape (const Py_buffer *dest, const Py_buffer *src)
static bool	equiv_structure (const Py_buffer *dest, const Py_buffer *src)
static int	init_slice (Py_buffer *base, PyObject *_key, int dim)
static Py_ssize_t	is_multiindex (PyObject *key)
static bool	is_multislice (PyObject *key)
static int	last_dim_is_contiguous (const Py_buffer *dest, const Py_buffer *src)
static PyObject *	ll_array (CPyCppyy::LowLevelView *self, PyObject *args, PyObject *kwds)
static PyObject *	ll_as_string (CPyCppyy::LowLevelView *self)
static int	ll_ass_sub (CPyCppyy::LowLevelView *self, PyObject *key, PyObject *value)
static void	ll_dealloc (CPyCppyy::LowLevelView *pyobj)
static int	ll_getbuf (CPyCppyy::LowLevelView *self, Py_buffer *view, int flags)
static PyObject *	ll_getcpparray (CPyCppyy::LowLevelView *pyobj)
static PyObject *	ll_getownership (CPyCppyy::LowLevelView *pyobj)
static Py_ssize_t	ll_getsegcount (PyObject *, Py_ssize_t *lenp)
static PyObject *	ll_item (CPyCppyy::LowLevelView *self, Py_ssize_t index)
static PyObject *	ll_item_multi (CPyCppyy::LowLevelView *self, PyObject *tup)
static PyObject *	ll_iter (PyObject *self)
static Py_ssize_t	ll_length (CPyCppyy::LowLevelView *self)
static CPyCppyy::LowLevelView *	ll_new (PyTypeObject *subtype, PyObject *, PyObject *)
static Py_ssize_t	ll_oldgetbuf (CPyCppyy::LowLevelView *self, Py_ssize_t seg, void **pptr)
static PyObject *	ll_reshape (CPyCppyy::LowLevelView *self, PyObject *shape)
static int	ll_setcpparray (CPyCppyy::LowLevelView *pyobj, PyObject *value, void *)
static int	ll_setownership (CPyCppyy::LowLevelView *pyobj, PyObject *value, void *)
static PyObject *	ll_shape (CPyCppyy::LowLevelView *self)
static PyObject *	ll_subscript (CPyCppyy::LowLevelView *self, PyObject *key)
static PyObject *	ll_typecode (CPyCppyy::LowLevelView *self, void *)
static char *	lookup_dimension (Py_buffer &view, char *ptr, int dim, Py_ssize_t index)
static void *	ptr_from_index (CPyCppyy::LowLevelView *llview, Py_ssize_t index)
static void *	ptr_from_tuple (CPyCppyy::LowLevelView *llview, PyObject *tup)
static void	set_strides (Py_buffer &view, size_t itemsize, bool isfix)

Variables
static PyBufferProcs	ll_as_buffer
static PyMappingMethods	ll_as_mapping
static PySequenceMethods	ll_as_sequence
static PyGetSetDef	ll_getset []
static PyMethodDef	ll_methods []
PyTypeObject	CPyCppyy::LowLevelView_Type

Macro Definition Documentation

ADJUST_PTR

#define ADJUST_PTR	(		ptr,
			suboffsets,
			dim )

Value:

(HAVE_PTR(suboffsets, dim) ? *((char**)ptr) + suboffsets[dim] : ptr)

Definition at line 122 of file LowLevelViews.cxx.

CPPYY_IMPL_VIEW_CREATOR

#define CPPYY_IMPL_VIEW_CREATOR

(

type

)

Value:

PyObject* CPyCppyy::CreateLowLevelView(type* address, cdims_t shape) {      \
    LowLevelView* ll = CreateLowLevelViewT<type>(address, shape);           \
    CPPYY_RET_W_CREATOR(type*, CreateLowLevelView);                         \
}                                                                           \
PyObject* CPyCppyy::CreateLowLevelView(type** address, cdims_t shape) {     \
    LowLevelView* ll = CreateLowLevelViewT<type>(address, shape);           \
    CPPYY_RET_W_CREATOR(type**, CreateLowLevelView);                        \
}

Definition at line 1131 of file LowLevelViews.cxx.

CPPYY_RET_W_CREATOR

#define CPPYY_RET_W_CREATOR	(		type,
			fname )

Value:

PyObject* (*c)(type, cdims_t) = &fname;                                 \
ll->fCreator = (LowLevelView::Creator_t)c;                              \
return (PyObject*)ll

Definition at line 1126 of file LowLevelViews.cxx.

CPYCPPYY_LL_FLAG_GETSET

#define CPYCPPYY_LL_FLAG_GETSET	(		name,
			flag,
			doc )

Value:

static PyObject* ll_get##name(CPyCppyy::LowLevelView* pyobj)                 \
{                                                                            \
    return PyBool_FromLong((long)((intptr_t)pyobj->fBufInfo.internal & flag));\
}                                                                            \
                                                                             \
static int ll_set##name(CPyCppyy::LowLevelView* pyobj, PyObject* value, void*)\
{                                                                            \
    long settrue = PyLong_AsLong(value);                                     \
    if (settrue == -1 && PyErr_Occurred()) {                                 \
        PyErr_SetString(PyExc_ValueError, #doc" should be either True or False");\
        return -1;                                                           \
    }                                                                        \
                                                                             \
    if ((bool)settrue)                                                       \
       (intptr_t&)pyobj->fBufInfo.internal |=  flag;                         \
    else                                                                     \
       (intptr_t&)pyobj->fBufInfo.internal &= ~flag;                         \
                                                                             \
    return 0;                                                                \
}

Definition at line 81 of file LowLevelViews.cxx.

HAVE_PTR

#define HAVE_PTR	(		suboffsets,
			dim )

Value:

(suboffsets && suboffsets[dim] >= 0)

Definition at line 120 of file LowLevelViews.cxx.

HAVE_SUBOFFSETS_IN_LAST_DIM

#define HAVE_SUBOFFSETS_IN_LAST_DIM

(

view

)

Value:

(view->suboffsets && view->suboffsets[dest->ndim-1] >= 0)

Definition at line 127 of file LowLevelViews.cxx.

Function Documentation

copy_base()

void copy_base ( const Py_ssize_t * shape, Py_ssize_t itemsize, char * dptr, const Py_ssize_t * dstrides, const Py_ssize_t * dsuboffsets, char * sptr, const Py_ssize_t * sstrides, const Py_ssize_t * ssuboffsets, char * mem )

static

Definition at line 175 of file LowLevelViews.cxx.

copy_single()

int copy_single ( Py_buffer * dest, Py_buffer * src )

static

Definition at line 206 of file LowLevelViews.cxx.

CreateLowLevelViewT() [1/2]

template<typename T>

CPyCppyy::LowLevelView * CreateLowLevelViewT ( T ** address, CPyCppyy::cdims_t shape, const char * format = nullptr, const char * name = nullptr )

inlinestatic

Definition at line 1116 of file LowLevelViews.cxx.

CreateLowLevelViewT() [2/2]

template<typename T>

CPyCppyy::LowLevelView * CreateLowLevelViewT ( T * address, CPyCppyy::cdims_t shape, const char * format = nullptr, const char * name = nullptr, Py_ssize_t itemsize = -1 )

inlinestatic

Definition at line 1059 of file LowLevelViews.cxx.

equiv_shape()

bool equiv_shape ( const Py_buffer * dest, const Py_buffer * src )

inlinestatic

Definition at line 141 of file LowLevelViews.cxx.

equiv_structure()

bool equiv_structure ( const Py_buffer * dest, const Py_buffer * src )

static

Definition at line 160 of file LowLevelViews.cxx.

init_slice()

int init_slice ( Py_buffer * base, PyObject * _key, int dim )

inlinestatic

Definition at line 322 of file LowLevelViews.cxx.

is_multiindex()

Py_ssize_t is_multiindex ( PyObject * key )

static

Definition at line 372 of file LowLevelViews.cxx.

is_multislice()

bool is_multislice ( PyObject * key )

static

Definition at line 354 of file LowLevelViews.cxx.

last_dim_is_contiguous()

int last_dim_is_contiguous ( const Py_buffer * dest, const Py_buffer * src )

inlinestatic

Definition at line 131 of file LowLevelViews.cxx.

ll_array()

PyObject * ll_array ( CPyCppyy::LowLevelView * self, PyObject * args, PyObject * kwds )

static

Definition at line 820 of file LowLevelViews.cxx.

ll_as_string()

PyObject * ll_as_string ( CPyCppyy::LowLevelView * self )

static

Definition at line 880 of file LowLevelViews.cxx.

ll_ass_sub()

int ll_ass_sub ( CPyCppyy::LowLevelView * self, PyObject * key, PyObject * value )

static

Definition at line 517 of file LowLevelViews.cxx.

ll_dealloc()

void ll_dealloc ( CPyCppyy::LowLevelView * pyobj )

static

Definition at line 57 of file LowLevelViews.cxx.

ll_getbuf()

int ll_getbuf ( CPyCppyy::LowLevelView * self, Py_buffer * view, int flags )

static

Definition at line 635 of file LowLevelViews.cxx.

ll_getcpparray()

PyObject * ll_getcpparray ( CPyCppyy::LowLevelView * pyobj )

static

Definition at line 104 of file LowLevelViews.cxx.

ll_getownership()

PyObject * ll_getownership ( CPyCppyy::LowLevelView * pyobj )

static

Definition at line 103 of file LowLevelViews.cxx.

ll_getsegcount()

Py_ssize_t ll_getsegcount ( PyObject * , Py_ssize_t * lenp )

static

Definition at line 627 of file LowLevelViews.cxx.

ll_item()

PyObject * ll_item ( CPyCppyy::LowLevelView * self, Py_ssize_t index )

static

Definition at line 391 of file LowLevelViews.cxx.

ll_item_multi()

PyObject * ll_item_multi ( CPyCppyy::LowLevelView * self, PyObject * tup )

static

Definition at line 418 of file LowLevelViews.cxx.

ll_iter()

PyObject * ll_iter ( PyObject * self )

static

Definition at line 681 of file LowLevelViews.cxx.

ll_length()

Py_ssize_t ll_length ( CPyCppyy::LowLevelView * self )

static

Definition at line 314 of file LowLevelViews.cxx.

ll_new()

CPyCppyy::LowLevelView * ll_new ( PyTypeObject * subtype, PyObject * , PyObject *  )

static

Definition at line 40 of file LowLevelViews.cxx.

ll_oldgetbuf()

Py_ssize_t ll_oldgetbuf ( CPyCppyy::LowLevelView * self, Py_ssize_t seg, void ** pptr )

static

Definition at line 615 of file LowLevelViews.cxx.

ll_reshape()

PyObject * ll_reshape ( CPyCppyy::LowLevelView * self, PyObject * shape )

static

Definition at line 749 of file LowLevelViews.cxx.

ll_setcpparray()

int ll_setcpparray ( CPyCppyy::LowLevelView * pyobj, PyObject * value, void *  )

static

Definition at line 104 of file LowLevelViews.cxx.

ll_setownership()

int ll_setownership ( CPyCppyy::LowLevelView * pyobj, PyObject * value, void *  )

static

Definition at line 103 of file LowLevelViews.cxx.

ll_shape()

PyObject * ll_shape ( CPyCppyy::LowLevelView * self )

static

Definition at line 737 of file LowLevelViews.cxx.

ll_subscript()

PyObject * ll_subscript ( CPyCppyy::LowLevelView * self, PyObject * key )

static

Definition at line 444 of file LowLevelViews.cxx.

ll_typecode()

PyObject * ll_typecode ( CPyCppyy::LowLevelView * self, void *  )

static

Definition at line 107 of file LowLevelViews.cxx.

lookup_dimension()

char * lookup_dimension ( Py_buffer & view, char * ptr, int dim, Py_ssize_t index )

static

Definition at line 237 of file LowLevelViews.cxx.

ptr_from_index()

void * ptr_from_index ( CPyCppyy::LowLevelView * llview, Py_ssize_t index )

inlinestatic

Definition at line 275 of file LowLevelViews.cxx.

ptr_from_tuple()

void * ptr_from_tuple ( CPyCppyy::LowLevelView * llview, PyObject * tup )

static

Definition at line 283 of file LowLevelViews.cxx.

set_strides()

void set_strides ( Py_buffer & view, size_t itemsize, bool isfix )

inlinestatic

Definition at line 24 of file LowLevelViews.cxx.

Variable Documentation

ll_as_buffer

PyBufferProcs ll_as_buffer

static

Initial value:

                                  = {
 
    (readbufferproc)ll_oldgetbuf,   
    (writebufferproc)ll_oldgetbuf,  
    (segcountproc)ll_getsegcount,   
    0,                              
 
    (getbufferproc)ll_getbuf,       
    0,                              
}

Definition at line 723 of file LowLevelViews.cxx.

ll_as_mapping

PyMappingMethods ll_as_mapping

static

Initial value:

                                      = {
    ( inquiry )      ll_length,      
    (binaryfunc)   ll_subscript,   
    (objobjargproc)ll_ass_sub,     
}

Definition at line 702 of file LowLevelViews.cxx.

ll_as_sequence

PySequenceMethods ll_as_sequence

static

Initial value:

                                        = {
    ( inquiry )ll_length,            
    0,                             
    0,                             
    ( intargfunc )ll_item,         
    0,                             
    0,                             
    0,                             
    0,                             
    0,                             
    0,                             
}

Definition at line 709 of file LowLevelViews.cxx.

ll_getset

PyGetSetDef ll_getset[]

static

Initial value:

                             = {
    {(char*)"__python_owns__", (getter)ll_getownership, (setter)ll_setownership,
        (char*)"If true, python manages the life time of this buffer", nullptr},
    {(char*)"__cpp_array__",   (getter)ll_getcpparray,  (setter)ll_setcpparray,
        (char*)"If true, this array was allocated with C++\'s new[]", nullptr},
    {(char*)"format",   (getter)ll_typecode, nullptr, nullptr, nullptr},
    {(char*)"typecode", (getter)ll_typecode, nullptr, nullptr, nullptr},
    {(char*)"shape", (getter)ll_shape, (setter)ll_reshape, nullptr, nullptr},
    {(char*)nullptr, nullptr, nullptr, nullptr, nullptr }
}

Definition at line 909 of file LowLevelViews.cxx.

ll_methods

PyMethodDef ll_methods[]

static

Initial value:

                              = {
    {(char*)"reshape",     (PyCFunction)ll_reshape, METH_O,
        (char*)"change the shape (not layout) of the low level view"},
    {(char*)"as_string",   (PyCFunction)ll_as_string, METH_NOARGS,
        (char*)"interpret memory as a null-terminated char string and return Python str"},
    {(char*)"__array__",   (PyCFunction)ll_array,   METH_VARARGS | METH_KEYWORDS,
        (char*)"return a numpy array from the low level view"},
    {(char*)nullptr, nullptr, 0, nullptr}
}

Definition at line 898 of file LowLevelViews.cxx.