class Fiddle::MemoryView
Public Class Methods
new(p1)
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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)) { rb_raise(rb_eArgError, "Unable to get a memory view from %+"PRIsVALUE, target); } return Qnil; }
Public Instance Methods
[](*args)
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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); }
byte_size()
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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); }
format()
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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); }
item_size()
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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); }
ndim()
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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); }
obj()
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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; }
readonly?()
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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; }
shape()
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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; }
strides()
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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; }
sub_offsets()
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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; }