Class: Fiddle::MemoryView
Class Method Summary collapse
Instance Method Summary collapse
- #[](*args) ⇒ Object
- #byte_size ⇒ Object
- #format ⇒ Object
- #initialize(target) ⇒ Object constructor
- #item_size ⇒ Object
- #ndim ⇒ Object
- #obj ⇒ Object
- #readonly? ⇒ Boolean
- #release ⇒ Object
- #shape ⇒ Object
- #strides ⇒ Object
- #sub_offsets ⇒ Object
- #to_s ⇒ Object
Constructor Details
#initialize(target) ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 103
static VALUE
rb_fiddle_memview_initialize(VALUE obj, VALUE target)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (!rb_memory_view_get(target, &data->view, 0)) {
data->view.obj = Qnil;
rb_raise(rb_eArgError, "Unable to get a memory view from %+"PRIsVALUE, target);
}
return Qnil;
}
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Class Method Details
.export(target) ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 94
static VALUE
rb_fiddle_memview_s_export(VALUE klass, VALUE target)
{
ID id_new;
CONST_ID(id_new, "new");
VALUE memview = rb_funcall(klass, id_new, 1, target);
return rb_ensure(rb_yield, memview, rb_fiddle_memview_release, memview);
}
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Instance Method Details
#[](*args) ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 230
static VALUE
rb_fiddle_memview_aref(int argc, VALUE *argv, VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
const ssize_t ndim = data->view.ndim;
if (argc != ndim) {
rb_raise(rb_eIndexError, "wrong number of index (%d for %"PRIdSIZE")", argc, ndim);
}
VALUE indices_v = 0;
ssize_t *indices = ALLOCV_N(ssize_t, indices_v, ndim);
ssize_t i;
for (i = 0; i < ndim; ++i) {
ssize_t x = NUM2SSIZET(argv[i]);
indices[i] = x;
}
uint8_t *ptr = rb_memory_view_get_item_pointer(&data->view, indices);
ALLOCV_END(indices_v);
if (data->view.format == NULL) {
return INT2FIX(*ptr);
}
if (!data->members) {
const char *err;
if (rb_memory_view_parse_item_format(data->view.format, &data->members, &data->n_members, &err) < 0) {
rb_raise(rb_eRuntimeError, "Unable to recognize item format at %"PRIdSIZE" in \"%s\"",
err - data->view.format, data->view.format);
}
}
return rb_memory_view_extract_item_members(ptr, data->members, data->n_members);
}
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#byte_size ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 126
static VALUE
rb_fiddle_memview_get_byte_size(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
return SSIZET2NUM(data->view.byte_size);
}
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#format ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 146
static VALUE
rb_fiddle_memview_get_format(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
return data->view.format == NULL ? Qnil : rb_str_new_cstr(data->view.format);
}
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#item_size ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 156
static VALUE
rb_fiddle_memview_get_item_size(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
return SSIZET2NUM(data->view.item_size);
}
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#ndim ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 166
static VALUE
rb_fiddle_memview_get_ndim(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
return SSIZET2NUM(data->view.ndim);
}
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#obj ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 117
static VALUE
rb_fiddle_memview_get_obj(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
return data->view.obj;
}
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#readonly? ⇒ Boolean
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# File 'ext/fiddle/memory_view.c', line 136
static VALUE
rb_fiddle_memview_get_readonly(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
return data->view.readonly ? Qtrue : Qfalse;
}
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#release ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 83
static VALUE
rb_fiddle_memview_release(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
fiddle_memview_release(data);
return Qnil;
}
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#shape ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 176
static VALUE
rb_fiddle_memview_get_shape(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
if (data->view.shape == NULL) return Qnil;
const ssize_t ndim = data->view.ndim;
VALUE shape = rb_ary_new_capa(ndim);
ssize_t i;
for (i = 0; i < ndim; ++i) {
rb_ary_push(shape, SSIZET2NUM(data->view.shape[i]));
}
return shape;
}
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#strides ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 194
static VALUE
rb_fiddle_memview_get_strides(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
if (data->view.strides == NULL) return Qnil;
const ssize_t ndim = data->view.ndim;
VALUE strides = rb_ary_new_capa(ndim);
ssize_t i;
for (i = 0; i < ndim; ++i) {
rb_ary_push(strides, SSIZET2NUM(data->view.strides[i]));
}
return strides;
}
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#sub_offsets ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 212
static VALUE
rb_fiddle_memview_get_sub_offsets(VALUE obj)
{
struct memview_data *data;
TypedData_Get_Struct(obj, struct memview_data, &fiddle_memview_data_type, data);
if (NIL_P(data->view.obj)) return Qnil;
if (data->view.sub_offsets == NULL) return Qnil;
const ssize_t ndim = data->view.ndim;
VALUE sub_offsets = rb_ary_new_capa(ndim);
ssize_t i;
for (i = 0; i < ndim; ++i) {
rb_ary_push(sub_offsets, SSIZET2NUM(data->view.sub_offsets[i]));
}
return sub_offsets;
}
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#to_s ⇒ Object
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# File 'ext/fiddle/memory_view.c', line 270
static VALUE
rb_fiddle_memview_to_s(VALUE self)
{
struct memview_data *data;
const char *raw_data;
long byte_size;
VALUE string;
TypedData_Get_Struct(self,
struct memview_data,
&fiddle_memview_data_type,
data);
if (NIL_P(data->view.obj)) {
raw_data = NULL;
byte_size = 0;
} else {
raw_data = data->view.data;
byte_size = data->view.byte_size;
}
string = rb_enc_str_new_static(raw_data, byte_size, rb_ascii8bit_encoding());
{
ID id_memory_view;
CONST_ID(id_memory_view, "memory_view");
rb_ivar_set(string, id_memory_view, self);
}
return rb_obj_freeze(string);
}
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