kopia lustrzana https://github.com/micropython/micropython
726 wiersze
28 KiB
C
726 wiersze
28 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2014-2018 Paul Sokolovsky
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <assert.h>
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#include <string.h>
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#include <stdint.h>
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#include "py/runtime.h"
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#include "py/objtuple.h"
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#include "py/binary.h"
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#if MICROPY_PY_UCTYPES
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// The uctypes module allows defining the layout of a raw data structure (using
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// terms of the C language), and then access memory buffers using this definition.
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// The module also provides convenience functions to access memory buffers
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// contained in Python objects or wrap memory buffers in Python objects.
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#define LAYOUT_LITTLE_ENDIAN (0)
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#define LAYOUT_BIG_ENDIAN (1)
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#define LAYOUT_NATIVE (2)
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#define VAL_TYPE_BITS 4
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#define BITF_LEN_BITS 5
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#define BITF_OFF_BITS 5
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#define OFFSET_BITS 17
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#define LEN_BITS (OFFSET_BITS + BITF_OFF_BITS)
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#if VAL_TYPE_BITS + BITF_LEN_BITS + BITF_OFF_BITS + OFFSET_BITS != 31
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#error Invalid encoding field length
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#endif
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enum {
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UINT8, INT8, UINT16, INT16,
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UINT32, INT32, UINT64, INT64,
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BFUINT8, BFINT8, BFUINT16, BFINT16,
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BFUINT32, BFINT32,
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FLOAT32, FLOAT64,
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};
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#define AGG_TYPE_BITS 2
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enum {
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STRUCT, PTR, ARRAY,
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};
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// Here we need to set sign bit right
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#define TYPE2SMALLINT(x, nbits) ((((int)x) << (32 - nbits)) >> 1)
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#define GET_TYPE(x, nbits) (((x) >> (31 - nbits)) & ((1 << nbits) - 1))
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// Bit 0 is "is_signed"
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#define GET_SCALAR_SIZE(val_type) (1 << ((val_type) >> 1))
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#define VALUE_MASK(type_nbits) ~((int)0x80000000 >> type_nbits)
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#define IS_SCALAR_ARRAY(tuple_desc) ((tuple_desc)->len == 2)
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// We cannot apply the below to INT8, as their range [-128, 127]
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#define IS_SCALAR_ARRAY_OF_BYTES(tuple_desc) (GET_TYPE(MP_OBJ_SMALL_INT_VALUE((tuple_desc)->items[1]), VAL_TYPE_BITS) == UINT8)
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// "struct" in uctypes context means "structural", i.e. aggregate, type.
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STATIC const mp_obj_type_t uctypes_struct_type;
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typedef struct _mp_obj_uctypes_struct_t {
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mp_obj_base_t base;
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mp_obj_t desc;
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byte *addr;
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uint32_t flags;
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} mp_obj_uctypes_struct_t;
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STATIC NORETURN void syntax_error(void) {
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mp_raise_TypeError(MP_ERROR_TEXT("syntax error in uctypes descriptor"));
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}
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STATIC mp_obj_t uctypes_struct_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 2, 3, false);
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mp_obj_uctypes_struct_t *o = m_new_obj(mp_obj_uctypes_struct_t);
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o->base.type = type;
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o->addr = (void *)(uintptr_t)mp_obj_int_get_truncated(args[0]);
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o->desc = args[1];
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o->flags = LAYOUT_NATIVE;
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if (n_args == 3) {
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o->flags = mp_obj_get_int(args[2]);
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}
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return MP_OBJ_FROM_PTR(o);
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}
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STATIC void uctypes_struct_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
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const char *typen = "unk";
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if (mp_obj_is_dict_or_ordereddict(self->desc)) {
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typen = "STRUCT";
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} else if (mp_obj_is_type(self->desc, &mp_type_tuple)) {
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->desc);
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mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
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uint agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
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switch (agg_type) {
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case PTR:
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typen = "PTR";
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break;
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case ARRAY:
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typen = "ARRAY";
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break;
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}
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} else {
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typen = "ERROR";
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}
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mp_printf(print, "<struct %s %p>", typen, self->addr);
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}
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// Get size of any type descriptor
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STATIC mp_uint_t uctypes_struct_size(mp_obj_t desc_in, int layout_type, mp_uint_t *max_field_size);
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// Get size of scalar type descriptor
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static inline mp_uint_t uctypes_struct_scalar_size(int val_type) {
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if (val_type == FLOAT32) {
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return 4;
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} else {
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return GET_SCALAR_SIZE(val_type & 7);
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}
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}
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// Get size of aggregate type descriptor
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STATIC mp_uint_t uctypes_struct_agg_size(mp_obj_tuple_t *t, int layout_type, mp_uint_t *max_field_size) {
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mp_uint_t total_size = 0;
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mp_int_t offset_ = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
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mp_uint_t agg_type = GET_TYPE(offset_, AGG_TYPE_BITS);
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switch (agg_type) {
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case STRUCT:
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return uctypes_struct_size(t->items[1], layout_type, max_field_size);
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case PTR:
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if (sizeof(void *) > *max_field_size) {
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*max_field_size = sizeof(void *);
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}
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return sizeof(void *);
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case ARRAY: {
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mp_int_t arr_sz = MP_OBJ_SMALL_INT_VALUE(t->items[1]);
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uint val_type = GET_TYPE(arr_sz, VAL_TYPE_BITS);
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arr_sz &= VALUE_MASK(VAL_TYPE_BITS);
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mp_uint_t item_s;
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if (t->len == 2) {
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// Elements of array are scalar
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item_s = uctypes_struct_scalar_size(val_type);
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if (item_s > *max_field_size) {
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*max_field_size = item_s;
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}
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} else {
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// Elements of array are aggregates
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item_s = uctypes_struct_size(t->items[2], layout_type, max_field_size);
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}
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return item_s * arr_sz;
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}
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default:
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assert(0);
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}
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return total_size;
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}
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STATIC mp_uint_t uctypes_struct_size(mp_obj_t desc_in, int layout_type, mp_uint_t *max_field_size) {
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if (!mp_obj_is_dict_or_ordereddict(desc_in)) {
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if (mp_obj_is_type(desc_in, &mp_type_tuple)) {
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return uctypes_struct_agg_size((mp_obj_tuple_t *)MP_OBJ_TO_PTR(desc_in), layout_type, max_field_size);
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} else if (mp_obj_is_small_int(desc_in)) {
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// We allow sizeof on both type definitions and structures/structure fields,
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// but scalar structure field is lowered into native Python int, so all
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// type info is lost. So, we cannot say if it's scalar type description,
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// or such lowered scalar.
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mp_raise_TypeError(MP_ERROR_TEXT("can't unambiguously get sizeof scalar"));
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}
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syntax_error();
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}
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mp_obj_dict_t *d = MP_OBJ_TO_PTR(desc_in);
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mp_uint_t total_size = 0;
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for (mp_uint_t i = 0; i < d->map.alloc; i++) {
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if (mp_map_slot_is_filled(&d->map, i)) {
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mp_obj_t v = d->map.table[i].value;
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if (mp_obj_is_small_int(v)) {
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mp_uint_t offset = MP_OBJ_SMALL_INT_VALUE(v);
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mp_uint_t val_type = GET_TYPE(offset, VAL_TYPE_BITS);
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offset &= VALUE_MASK(VAL_TYPE_BITS);
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if (val_type >= BFUINT8 && val_type <= BFINT32) {
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offset &= (1 << OFFSET_BITS) - 1;
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}
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mp_uint_t s = uctypes_struct_scalar_size(val_type);
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if (s > *max_field_size) {
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*max_field_size = s;
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}
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if (offset + s > total_size) {
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total_size = offset + s;
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}
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} else {
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if (!mp_obj_is_type(v, &mp_type_tuple)) {
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syntax_error();
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}
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mp_obj_tuple_t *t = MP_OBJ_TO_PTR(v);
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mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
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offset &= VALUE_MASK(AGG_TYPE_BITS);
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mp_uint_t s = uctypes_struct_agg_size(t, layout_type, max_field_size);
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if (offset + s > total_size) {
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total_size = offset + s;
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}
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}
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}
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}
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// Round size up to alignment of biggest field
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if (layout_type == LAYOUT_NATIVE) {
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total_size = (total_size + *max_field_size - 1) & ~(*max_field_size - 1);
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}
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return total_size;
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}
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STATIC mp_obj_t uctypes_struct_sizeof(size_t n_args, const mp_obj_t *args) {
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mp_obj_t obj_in = args[0];
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mp_uint_t max_field_size = 0;
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if (mp_obj_is_type(obj_in, &mp_type_bytearray)) {
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return mp_obj_len(obj_in);
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}
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int layout_type = LAYOUT_NATIVE;
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// We can apply sizeof either to structure definition (a dict)
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// or to instantiated structure
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if (mp_obj_is_type(obj_in, &uctypes_struct_type)) {
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if (n_args != 1) {
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mp_raise_TypeError(NULL);
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}
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// Extract structure definition
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mp_obj_uctypes_struct_t *obj = MP_OBJ_TO_PTR(obj_in);
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obj_in = obj->desc;
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layout_type = obj->flags;
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} else {
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if (n_args == 2) {
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layout_type = mp_obj_get_int(args[1]);
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}
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}
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mp_uint_t size = uctypes_struct_size(obj_in, layout_type, &max_field_size);
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return MP_OBJ_NEW_SMALL_INT(size);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(uctypes_struct_sizeof_obj, 1, 2, uctypes_struct_sizeof);
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static inline mp_obj_t get_unaligned(uint val_type, byte *p, int big_endian) {
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char struct_type = big_endian ? '>' : '<';
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static const char type2char[16] = "BbHhIiQq------fd";
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return mp_binary_get_val(struct_type, type2char[val_type], p, &p);
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}
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static inline void set_unaligned(uint val_type, byte *p, int big_endian, mp_obj_t val) {
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char struct_type = big_endian ? '>' : '<';
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static const char type2char[16] = "BbHhIiQq------fd";
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mp_binary_set_val(struct_type, type2char[val_type], val, p, &p);
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}
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static inline mp_uint_t get_aligned_basic(uint val_type, void *p) {
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switch (val_type) {
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case UINT8:
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return *(uint8_t *)p;
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case UINT16:
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return *(uint16_t *)p;
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case UINT32:
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return *(uint32_t *)p;
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}
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assert(0);
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return 0;
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}
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static inline void set_aligned_basic(uint val_type, void *p, mp_uint_t v) {
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switch (val_type) {
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case UINT8:
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*(uint8_t *)p = (uint8_t)v;
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return;
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case UINT16:
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*(uint16_t *)p = (uint16_t)v;
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return;
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case UINT32:
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*(uint32_t *)p = (uint32_t)v;
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return;
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}
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assert(0);
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}
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STATIC mp_obj_t get_aligned(uint val_type, void *p, mp_int_t index) {
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switch (val_type) {
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case UINT8:
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return MP_OBJ_NEW_SMALL_INT(((uint8_t *)p)[index]);
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case INT8:
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return MP_OBJ_NEW_SMALL_INT(((int8_t *)p)[index]);
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case UINT16:
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return MP_OBJ_NEW_SMALL_INT(((uint16_t *)p)[index]);
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case INT16:
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return MP_OBJ_NEW_SMALL_INT(((int16_t *)p)[index]);
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case UINT32:
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return mp_obj_new_int_from_uint(((uint32_t *)p)[index]);
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case INT32:
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return mp_obj_new_int(((int32_t *)p)[index]);
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case UINT64:
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return mp_obj_new_int_from_ull(((uint64_t *)p)[index]);
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case INT64:
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return mp_obj_new_int_from_ll(((int64_t *)p)[index]);
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#if MICROPY_PY_BUILTINS_FLOAT
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case FLOAT32:
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return mp_obj_new_float_from_f(((float *)p)[index]);
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case FLOAT64:
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return mp_obj_new_float_from_d(((double *)p)[index]);
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#endif
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default:
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assert(0);
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return MP_OBJ_NULL;
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}
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}
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STATIC void set_aligned(uint val_type, void *p, mp_int_t index, mp_obj_t val) {
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#if MICROPY_PY_BUILTINS_FLOAT
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if (val_type == FLOAT32 || val_type == FLOAT64) {
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if (val_type == FLOAT32) {
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((float *)p)[index] = mp_obj_get_float_to_f(val);
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} else {
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((double *)p)[index] = mp_obj_get_float_to_d(val);
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}
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return;
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}
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#endif
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mp_int_t v = mp_obj_get_int_truncated(val);
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switch (val_type) {
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case UINT8:
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((uint8_t *)p)[index] = (uint8_t)v;
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return;
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case INT8:
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((int8_t *)p)[index] = (int8_t)v;
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return;
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case UINT16:
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((uint16_t *)p)[index] = (uint16_t)v;
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return;
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case INT16:
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((int16_t *)p)[index] = (int16_t)v;
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return;
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case UINT32:
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((uint32_t *)p)[index] = (uint32_t)v;
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return;
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case INT32:
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((int32_t *)p)[index] = (int32_t)v;
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return;
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case INT64:
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case UINT64:
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if (sizeof(mp_int_t) == 8) {
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((uint64_t *)p)[index] = (uint64_t)v;
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} else {
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// TODO: Doesn't offer atomic store semantics, but should at least try
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set_unaligned(val_type, (void *)&((uint64_t *)p)[index], MP_ENDIANNESS_BIG, val);
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}
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return;
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default:
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assert(0);
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}
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}
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STATIC mp_obj_t uctypes_struct_attr_op(mp_obj_t self_in, qstr attr, mp_obj_t set_val) {
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mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
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if (!mp_obj_is_dict_or_ordereddict(self->desc)) {
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mp_raise_TypeError(MP_ERROR_TEXT("struct: no fields"));
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}
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mp_obj_t deref = mp_obj_dict_get(self->desc, MP_OBJ_NEW_QSTR(attr));
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if (mp_obj_is_small_int(deref)) {
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mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(deref);
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mp_uint_t val_type = GET_TYPE(offset, VAL_TYPE_BITS);
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offset &= VALUE_MASK(VAL_TYPE_BITS);
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if (val_type <= INT64 || val_type == FLOAT32 || val_type == FLOAT64) {
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if (self->flags == LAYOUT_NATIVE) {
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if (set_val == MP_OBJ_NULL) {
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return get_aligned(val_type, self->addr + offset, 0);
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} else {
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set_aligned(val_type, self->addr + offset, 0, set_val);
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return set_val; // just !MP_OBJ_NULL
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}
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} else {
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if (set_val == MP_OBJ_NULL) {
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return get_unaligned(val_type, self->addr + offset, self->flags);
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} else {
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set_unaligned(val_type, self->addr + offset, self->flags, set_val);
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return set_val; // just !MP_OBJ_NULL
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}
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}
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} else if (val_type >= BFUINT8 && val_type <= BFINT32) {
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uint bit_offset = (offset >> OFFSET_BITS) & 31;
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uint bit_len = (offset >> LEN_BITS) & 31;
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offset &= (1 << OFFSET_BITS) - 1;
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mp_uint_t val;
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if (self->flags == LAYOUT_NATIVE) {
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val = get_aligned_basic(val_type & 6, self->addr + offset);
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} else {
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val = mp_binary_get_int(GET_SCALAR_SIZE(val_type & 7), val_type & 1, self->flags, self->addr + offset);
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}
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if (set_val == MP_OBJ_NULL) {
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val >>= bit_offset;
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val &= (1 << bit_len) - 1;
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// TODO: signed
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assert((val_type & 1) == 0);
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return mp_obj_new_int(val);
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} else {
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mp_uint_t set_val_int = (mp_uint_t)mp_obj_get_int(set_val);
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mp_uint_t mask = (1 << bit_len) - 1;
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set_val_int &= mask;
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set_val_int <<= bit_offset;
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mask <<= bit_offset;
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val = (val & ~mask) | set_val_int;
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if (self->flags == LAYOUT_NATIVE) {
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set_aligned_basic(val_type & 6, self->addr + offset, val);
|
|
} else {
|
|
mp_binary_set_int(GET_SCALAR_SIZE(val_type & 7), self->flags == LAYOUT_BIG_ENDIAN,
|
|
self->addr + offset, val);
|
|
}
|
|
return set_val; // just !MP_OBJ_NULL
|
|
}
|
|
}
|
|
|
|
assert(0);
|
|
return MP_OBJ_NULL;
|
|
}
|
|
|
|
if (!mp_obj_is_type(deref, &mp_type_tuple)) {
|
|
syntax_error();
|
|
}
|
|
|
|
if (set_val != MP_OBJ_NULL) {
|
|
// Cannot assign to aggregate
|
|
syntax_error();
|
|
}
|
|
|
|
mp_obj_tuple_t *sub = MP_OBJ_TO_PTR(deref);
|
|
mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(sub->items[0]);
|
|
mp_uint_t agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
|
|
offset &= VALUE_MASK(AGG_TYPE_BITS);
|
|
|
|
switch (agg_type) {
|
|
case STRUCT: {
|
|
mp_obj_uctypes_struct_t *o = m_new_obj(mp_obj_uctypes_struct_t);
|
|
o->base.type = &uctypes_struct_type;
|
|
o->desc = sub->items[1];
|
|
o->addr = self->addr + offset;
|
|
o->flags = self->flags;
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
case ARRAY: {
|
|
mp_uint_t dummy;
|
|
if (IS_SCALAR_ARRAY(sub) && IS_SCALAR_ARRAY_OF_BYTES(sub)) {
|
|
return mp_obj_new_bytearray_by_ref(uctypes_struct_agg_size(sub, self->flags, &dummy), self->addr + offset);
|
|
}
|
|
// Fall thru to return uctypes struct object
|
|
MP_FALLTHROUGH
|
|
}
|
|
case PTR: {
|
|
mp_obj_uctypes_struct_t *o = m_new_obj(mp_obj_uctypes_struct_t);
|
|
o->base.type = &uctypes_struct_type;
|
|
o->desc = MP_OBJ_FROM_PTR(sub);
|
|
o->addr = self->addr + offset;
|
|
o->flags = self->flags;
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
}
|
|
|
|
// Should be unreachable once all cases are handled
|
|
return MP_OBJ_NULL;
|
|
}
|
|
|
|
STATIC void uctypes_struct_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
|
|
if (dest[0] == MP_OBJ_NULL) {
|
|
// load attribute
|
|
mp_obj_t val = uctypes_struct_attr_op(self_in, attr, MP_OBJ_NULL);
|
|
dest[0] = val;
|
|
} else {
|
|
// delete/store attribute
|
|
if (uctypes_struct_attr_op(self_in, attr, dest[1]) != MP_OBJ_NULL) {
|
|
dest[0] = MP_OBJ_NULL; // indicate success
|
|
}
|
|
}
|
|
}
|
|
|
|
STATIC mp_obj_t uctypes_struct_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
|
|
mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
|
|
|
|
if (value == MP_OBJ_NULL) {
|
|
// delete
|
|
return MP_OBJ_NULL; // op not supported
|
|
} else {
|
|
// load / store
|
|
if (!mp_obj_is_type(self->desc, &mp_type_tuple)) {
|
|
mp_raise_TypeError(MP_ERROR_TEXT("struct: can't index"));
|
|
}
|
|
|
|
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->desc);
|
|
mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
|
|
uint agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
|
|
|
|
mp_int_t index = MP_OBJ_SMALL_INT_VALUE(index_in);
|
|
|
|
if (agg_type == ARRAY) {
|
|
mp_int_t arr_sz = MP_OBJ_SMALL_INT_VALUE(t->items[1]);
|
|
uint val_type = GET_TYPE(arr_sz, VAL_TYPE_BITS);
|
|
arr_sz &= VALUE_MASK(VAL_TYPE_BITS);
|
|
if (index >= arr_sz) {
|
|
mp_raise_msg(&mp_type_IndexError, MP_ERROR_TEXT("struct: index out of range"));
|
|
}
|
|
|
|
if (t->len == 2) {
|
|
// array of scalars
|
|
if (self->flags == LAYOUT_NATIVE) {
|
|
if (value == MP_OBJ_SENTINEL) {
|
|
return get_aligned(val_type, self->addr, index);
|
|
} else {
|
|
set_aligned(val_type, self->addr, index, value);
|
|
return value; // just !MP_OBJ_NULL
|
|
}
|
|
} else {
|
|
byte *p = self->addr + uctypes_struct_scalar_size(val_type) * index;
|
|
if (value == MP_OBJ_SENTINEL) {
|
|
return get_unaligned(val_type, p, self->flags);
|
|
} else {
|
|
set_unaligned(val_type, p, self->flags, value);
|
|
return value; // just !MP_OBJ_NULL
|
|
}
|
|
}
|
|
} else if (value == MP_OBJ_SENTINEL) {
|
|
mp_uint_t dummy = 0;
|
|
mp_uint_t size = uctypes_struct_size(t->items[2], self->flags, &dummy);
|
|
mp_obj_uctypes_struct_t *o = m_new_obj(mp_obj_uctypes_struct_t);
|
|
o->base.type = &uctypes_struct_type;
|
|
o->desc = t->items[2];
|
|
o->addr = self->addr + size * index;
|
|
o->flags = self->flags;
|
|
return MP_OBJ_FROM_PTR(o);
|
|
} else {
|
|
return MP_OBJ_NULL; // op not supported
|
|
}
|
|
|
|
} else if (agg_type == PTR) {
|
|
byte *p = *(void **)self->addr;
|
|
if (mp_obj_is_small_int(t->items[1])) {
|
|
uint val_type = GET_TYPE(MP_OBJ_SMALL_INT_VALUE(t->items[1]), VAL_TYPE_BITS);
|
|
return get_aligned(val_type, p, index);
|
|
} else {
|
|
mp_uint_t dummy = 0;
|
|
mp_uint_t size = uctypes_struct_size(t->items[1], self->flags, &dummy);
|
|
mp_obj_uctypes_struct_t *o = m_new_obj(mp_obj_uctypes_struct_t);
|
|
o->base.type = &uctypes_struct_type;
|
|
o->desc = t->items[1];
|
|
o->addr = p + size * index;
|
|
o->flags = self->flags;
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
}
|
|
|
|
assert(0);
|
|
return MP_OBJ_NULL;
|
|
}
|
|
}
|
|
|
|
STATIC mp_obj_t uctypes_struct_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
|
|
mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
|
|
switch (op) {
|
|
case MP_UNARY_OP_INT:
|
|
if (mp_obj_is_type(self->desc, &mp_type_tuple)) {
|
|
mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->desc);
|
|
mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
|
|
uint agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
|
|
if (agg_type == PTR) {
|
|
byte *p = *(void **)self->addr;
|
|
return mp_obj_new_int((mp_int_t)(uintptr_t)p);
|
|
}
|
|
}
|
|
MP_FALLTHROUGH
|
|
|
|
default:
|
|
return MP_OBJ_NULL; // op not supported
|
|
}
|
|
}
|
|
|
|
STATIC mp_int_t uctypes_get_buffer(mp_obj_t self_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
|
|
(void)flags;
|
|
mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
|
|
mp_uint_t max_field_size = 0;
|
|
mp_uint_t size = uctypes_struct_size(self->desc, self->flags, &max_field_size);
|
|
|
|
bufinfo->buf = self->addr;
|
|
bufinfo->len = size;
|
|
bufinfo->typecode = BYTEARRAY_TYPECODE;
|
|
return 0;
|
|
}
|
|
|
|
// addressof()
|
|
// Return address of object's data (applies to objects providing the buffer interface).
|
|
STATIC mp_obj_t uctypes_struct_addressof(mp_obj_t buf) {
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
|
|
return mp_obj_new_int((mp_int_t)(uintptr_t)bufinfo.buf);
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_1(uctypes_struct_addressof_obj, uctypes_struct_addressof);
|
|
|
|
// bytearray_at()
|
|
// Capture memory at given address of given size as bytearray.
|
|
STATIC mp_obj_t uctypes_struct_bytearray_at(mp_obj_t ptr, mp_obj_t size) {
|
|
return mp_obj_new_bytearray_by_ref(mp_obj_int_get_truncated(size), (void *)(uintptr_t)mp_obj_int_get_truncated(ptr));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(uctypes_struct_bytearray_at_obj, uctypes_struct_bytearray_at);
|
|
|
|
// bytes_at()
|
|
// Capture memory at given address of given size as bytes.
|
|
STATIC mp_obj_t uctypes_struct_bytes_at(mp_obj_t ptr, mp_obj_t size) {
|
|
return mp_obj_new_bytes((void *)(uintptr_t)mp_obj_int_get_truncated(ptr), mp_obj_int_get_truncated(size));
|
|
}
|
|
MP_DEFINE_CONST_FUN_OBJ_2(uctypes_struct_bytes_at_obj, uctypes_struct_bytes_at);
|
|
|
|
STATIC const mp_obj_type_t uctypes_struct_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_struct,
|
|
.print = uctypes_struct_print,
|
|
.make_new = uctypes_struct_make_new,
|
|
.attr = uctypes_struct_attr,
|
|
.subscr = uctypes_struct_subscr,
|
|
.unary_op = uctypes_struct_unary_op,
|
|
.buffer_p = { .get_buffer = uctypes_get_buffer },
|
|
};
|
|
|
|
STATIC const mp_rom_map_elem_t mp_module_uctypes_globals_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uctypes) },
|
|
{ MP_ROM_QSTR(MP_QSTR_struct), MP_ROM_PTR(&uctypes_struct_type) },
|
|
{ MP_ROM_QSTR(MP_QSTR_sizeof), MP_ROM_PTR(&uctypes_struct_sizeof_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_addressof), MP_ROM_PTR(&uctypes_struct_addressof_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_bytes_at), MP_ROM_PTR(&uctypes_struct_bytes_at_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_bytearray_at), MP_ROM_PTR(&uctypes_struct_bytearray_at_obj) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_NATIVE), MP_ROM_INT(LAYOUT_NATIVE) },
|
|
{ MP_ROM_QSTR(MP_QSTR_LITTLE_ENDIAN), MP_ROM_INT(LAYOUT_LITTLE_ENDIAN) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BIG_ENDIAN), MP_ROM_INT(LAYOUT_BIG_ENDIAN) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_VOID), MP_ROM_INT(TYPE2SMALLINT(UINT8, VAL_TYPE_BITS)) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_UINT8), MP_ROM_INT(TYPE2SMALLINT(UINT8, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_INT8), MP_ROM_INT(TYPE2SMALLINT(INT8, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_UINT16), MP_ROM_INT(TYPE2SMALLINT(UINT16, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_INT16), MP_ROM_INT(TYPE2SMALLINT(INT16, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_UINT32), MP_ROM_INT(TYPE2SMALLINT(UINT32, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_INT32), MP_ROM_INT(TYPE2SMALLINT(INT32, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_UINT64), MP_ROM_INT(TYPE2SMALLINT(UINT64, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_INT64), MP_ROM_INT(TYPE2SMALLINT(INT64, VAL_TYPE_BITS)) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_BFUINT8), MP_ROM_INT(TYPE2SMALLINT(BFUINT8, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BFINT8), MP_ROM_INT(TYPE2SMALLINT(BFINT8, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BFUINT16), MP_ROM_INT(TYPE2SMALLINT(BFUINT16, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BFINT16), MP_ROM_INT(TYPE2SMALLINT(BFINT16, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BFUINT32), MP_ROM_INT(TYPE2SMALLINT(BFUINT32, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BFINT32), MP_ROM_INT(TYPE2SMALLINT(BFINT32, VAL_TYPE_BITS)) },
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_BF_POS), MP_ROM_INT(OFFSET_BITS) },
|
|
{ MP_ROM_QSTR(MP_QSTR_BF_LEN), MP_ROM_INT(LEN_BITS) },
|
|
|
|
#if MICROPY_PY_BUILTINS_FLOAT
|
|
{ MP_ROM_QSTR(MP_QSTR_FLOAT32), MP_ROM_INT(TYPE2SMALLINT(FLOAT32, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_FLOAT64), MP_ROM_INT(TYPE2SMALLINT(FLOAT64, VAL_TYPE_BITS)) },
|
|
#endif
|
|
|
|
#if MICROPY_PY_UCTYPES_NATIVE_C_TYPES
|
|
// C native type aliases. These depend on GCC-compatible predefined
|
|
// preprocessor macros.
|
|
#if __SIZEOF_SHORT__ == 2
|
|
{ MP_ROM_QSTR(MP_QSTR_SHORT), MP_ROM_INT(TYPE2SMALLINT(INT16, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_USHORT), MP_ROM_INT(TYPE2SMALLINT(UINT16, VAL_TYPE_BITS)) },
|
|
#endif
|
|
#if __SIZEOF_INT__ == 4
|
|
{ MP_ROM_QSTR(MP_QSTR_INT), MP_ROM_INT(TYPE2SMALLINT(INT32, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_UINT), MP_ROM_INT(TYPE2SMALLINT(UINT32, VAL_TYPE_BITS)) },
|
|
#endif
|
|
#if __SIZEOF_LONG__ == 4
|
|
{ MP_ROM_QSTR(MP_QSTR_LONG), MP_ROM_INT(TYPE2SMALLINT(INT32, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_ULONG), MP_ROM_INT(TYPE2SMALLINT(UINT32, VAL_TYPE_BITS)) },
|
|
#elif __SIZEOF_LONG__ == 8
|
|
{ MP_ROM_QSTR(MP_QSTR_LONG), MP_ROM_INT(TYPE2SMALLINT(INT64, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_ULONG), MP_ROM_INT(TYPE2SMALLINT(UINT64, VAL_TYPE_BITS)) },
|
|
#endif
|
|
#if __SIZEOF_LONG_LONG__ == 8
|
|
{ MP_ROM_QSTR(MP_QSTR_LONGLONG), MP_ROM_INT(TYPE2SMALLINT(INT64, VAL_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_ULONGLONG), MP_ROM_INT(TYPE2SMALLINT(UINT64, VAL_TYPE_BITS)) },
|
|
#endif
|
|
#endif // MICROPY_PY_UCTYPES_NATIVE_C_TYPES
|
|
|
|
{ MP_ROM_QSTR(MP_QSTR_PTR), MP_ROM_INT(TYPE2SMALLINT(PTR, AGG_TYPE_BITS)) },
|
|
{ MP_ROM_QSTR(MP_QSTR_ARRAY), MP_ROM_INT(TYPE2SMALLINT(ARRAY, AGG_TYPE_BITS)) },
|
|
};
|
|
STATIC MP_DEFINE_CONST_DICT(mp_module_uctypes_globals, mp_module_uctypes_globals_table);
|
|
|
|
const mp_obj_module_t mp_module_uctypes = {
|
|
.base = { &mp_type_module },
|
|
.globals = (mp_obj_dict_t *)&mp_module_uctypes_globals,
|
|
};
|
|
|
|
#endif
|