2014-05-03 18:27:38 -04:00
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/*
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* This file is part of the Micro Python 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) 2013, 2014 Damien P. George
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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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2014-02-14 10:16:35 -05:00
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#include <stdint.h>
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2014-04-18 18:25:49 -04:00
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#include <stdlib.h>
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2014-08-10 13:16:39 -04:00
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#include <stddef.h>
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2014-06-02 09:04:26 -04:00
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#include <string.h>
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2014-02-14 10:16:35 -05:00
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#include <assert.h>
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2015-01-01 15:27:54 -05:00
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#include "py/binary.h"
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#include "py/smallint.h"
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2015-04-25 18:16:39 -04:00
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#include "py/objint.h"
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2014-02-14 10:16:35 -05:00
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// Helpers to work with binary-encoded data
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2014-08-10 13:16:39 -04:00
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#ifndef alignof
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#define alignof(type) offsetof(struct { char c; type t; }, t)
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#endif
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2015-05-10 07:04:38 -04:00
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size_t mp_binary_get_size(char struct_type, char val_type, mp_uint_t *palign) {
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size_t size = 0;
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2014-04-18 18:25:49 -04:00
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int align = 1;
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switch (struct_type) {
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case '<': case '>':
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switch (val_type) {
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case 'b': case 'B':
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size = 1; break;
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case 'h': case 'H':
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size = 2; break;
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case 'i': case 'I':
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size = 4; break;
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case 'l': case 'L':
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size = 4; break;
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case 'q': case 'Q':
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size = 8; break;
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2014-09-06 12:24:52 -04:00
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case 'P': case 'O': case 'S':
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size = sizeof(void*); break;
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2014-11-21 13:16:25 -05:00
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case 'f':
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size = sizeof(float); break;
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case 'd':
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size = sizeof(double); break;
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2014-04-18 18:25:49 -04:00
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}
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break;
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case '@': {
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// TODO:
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// The simplest heuristic for alignment is to align by value
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// size, but that doesn't work for "bigger than int" types,
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// for example, long long may very well have long alignment
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// So, we introduce separate alignment handling, but having
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// formal support for that is different from actually supporting
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// particular (or any) ABI.
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switch (val_type) {
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case BYTEARRAY_TYPECODE:
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case 'b': case 'B':
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align = size = 1; break;
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case 'h': case 'H':
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2014-08-10 13:16:39 -04:00
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align = alignof(short);
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size = sizeof(short); break;
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2014-04-18 18:25:49 -04:00
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case 'i': case 'I':
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2014-08-10 13:16:39 -04:00
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align = alignof(int);
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size = sizeof(int); break;
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2014-04-18 18:25:49 -04:00
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case 'l': case 'L':
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2014-08-10 13:16:39 -04:00
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align = alignof(long);
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size = sizeof(long); break;
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2014-04-18 18:25:49 -04:00
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case 'q': case 'Q':
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2014-08-10 13:16:39 -04:00
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align = alignof(long long);
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size = sizeof(long long); break;
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2014-06-02 09:04:26 -04:00
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case 'P': case 'O': case 'S':
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2014-08-10 13:16:39 -04:00
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align = alignof(void*);
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size = sizeof(void*); break;
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2014-11-21 13:16:25 -05:00
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case 'f':
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align = alignof(float);
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size = sizeof(float); break;
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case 'd':
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align = alignof(double);
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size = sizeof(double); break;
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2014-04-18 18:25:49 -04:00
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}
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}
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2014-02-14 13:21:50 -05:00
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}
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2014-04-18 18:25:49 -04:00
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if (palign != NULL) {
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*palign = align;
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}
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return size;
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2014-02-14 13:21:50 -05:00
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}
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2014-10-03 13:44:14 -04:00
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mp_obj_t mp_binary_get_val_array(char typecode, void *p, mp_uint_t index) {
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2014-07-03 08:25:24 -04:00
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mp_int_t val = 0;
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2014-02-14 10:16:35 -05:00
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switch (typecode) {
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case 'b':
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2015-01-23 20:18:10 -05:00
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val = ((signed char*)p)[index];
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2014-02-14 10:16:35 -05:00
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break;
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case BYTEARRAY_TYPECODE:
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case 'B':
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2015-01-23 20:18:10 -05:00
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val = ((unsigned char*)p)[index];
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2014-02-14 10:16:35 -05:00
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break;
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case 'h':
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2015-01-23 20:18:10 -05:00
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val = ((short*)p)[index];
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2014-02-14 10:16:35 -05:00
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break;
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case 'H':
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2015-01-23 20:18:10 -05:00
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val = ((unsigned short*)p)[index];
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2014-02-14 10:16:35 -05:00
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break;
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case 'i':
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2015-01-23 20:18:10 -05:00
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return mp_obj_new_int(((int*)p)[index]);
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2014-02-14 10:16:35 -05:00
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case 'I':
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2015-01-23 20:18:10 -05:00
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return mp_obj_new_int_from_uint(((unsigned int*)p)[index]);
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case 'l':
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return mp_obj_new_int(((long*)p)[index]);
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2014-02-14 10:16:35 -05:00
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case 'L':
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2015-01-23 20:18:10 -05:00
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return mp_obj_new_int_from_uint(((unsigned long*)p)[index]);
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2015-09-01 11:25:29 -04:00
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#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
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2014-02-14 10:16:35 -05:00
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case 'q':
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return mp_obj_new_int_from_ll(((long long*)p)[index]);
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2015-09-01 11:25:29 -04:00
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case 'Q':
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return mp_obj_new_int_from_ull(((unsigned long long*)p)[index]);
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#endif
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2014-06-01 08:32:54 -04:00
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#if MICROPY_PY_BUILTINS_FLOAT
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2014-02-14 10:16:35 -05:00
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case 'f':
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return mp_obj_new_float(((float*)p)[index]);
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case 'd':
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return mp_obj_new_float(((double*)p)[index]);
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#endif
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2015-03-05 15:57:36 -05:00
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// Extension to CPython: array of objects
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case 'O':
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return ((mp_obj_t*)p)[index];
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2014-02-14 10:16:35 -05:00
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}
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return MP_OBJ_NEW_SMALL_INT(val);
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}
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2014-09-10 17:10:33 -04:00
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// The long long type is guaranteed to hold at least 64 bits, and size is at
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// most 8 (for q and Q), so we will always be able to parse the given data
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// and fit it into a long long.
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2014-10-06 11:05:35 -04:00
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long long mp_binary_get_int(mp_uint_t size, bool is_signed, bool big_endian, const byte *src) {
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2014-06-25 15:25:53 -04:00
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int delta;
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if (!big_endian) {
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delta = -1;
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2014-10-06 11:05:35 -04:00
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src += size - 1;
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2014-06-25 15:25:53 -04:00
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} else {
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delta = 1;
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}
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2014-09-10 17:10:33 -04:00
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long long val = 0;
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2014-10-06 11:05:35 -04:00
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if (is_signed && *src & 0x80) {
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2014-06-25 15:25:53 -04:00
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val = -1;
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}
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for (uint i = 0; i < size; i++) {
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val <<= 8;
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2014-10-06 11:05:35 -04:00
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val |= *src;
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src += delta;
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2014-06-25 15:25:53 -04:00
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}
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return val;
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}
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2014-04-10 15:19:32 -04:00
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#define is_signed(typecode) (typecode > 'Z')
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2014-04-10 20:47:21 -04:00
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mp_obj_t mp_binary_get_val(char struct_type, char val_type, byte **ptr) {
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2014-04-09 20:45:38 -04:00
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byte *p = *ptr;
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2014-08-30 09:59:21 -04:00
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mp_uint_t align;
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2014-04-18 18:25:49 -04:00
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2015-05-10 07:04:38 -04:00
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size_t size = mp_binary_get_size(struct_type, val_type, &align);
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2014-04-18 18:25:49 -04:00
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if (struct_type == '@') {
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// Make pointer aligned
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2014-07-03 08:25:24 -04:00
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p = (byte*)(((mp_uint_t)p + align - 1) & ~((mp_uint_t)align - 1));
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2014-04-18 18:25:49 -04:00
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#if MP_ENDIANNESS_LITTLE
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struct_type = '<';
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#else
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struct_type = '>';
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#endif
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2014-04-09 20:45:38 -04:00
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}
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2014-06-25 15:25:53 -04:00
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*ptr = p + size;
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2014-04-10 15:19:32 -04:00
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2014-09-10 17:10:33 -04:00
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long long val = mp_binary_get_int(size, is_signed(val_type), (struct_type == '>'), p);
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2014-04-10 15:19:32 -04:00
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2014-04-19 22:19:10 -04:00
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if (val_type == 'O') {
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2014-09-10 17:10:33 -04:00
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return (mp_obj_t)(mp_uint_t)val;
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2014-06-02 09:04:26 -04:00
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} else if (val_type == 'S') {
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2014-09-10 17:10:33 -04:00
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const char *s_val = (const char*)(mp_uint_t)val;
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return mp_obj_new_str(s_val, strlen(s_val), false);
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2015-01-24 21:50:34 -05:00
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#if MICROPY_PY_BUILTINS_FLOAT
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} else if (val_type == 'f') {
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union { uint32_t i; float f; } fpu = {val};
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return mp_obj_new_float(fpu.f);
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} else if (val_type == 'd') {
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union { uint64_t i; double f; } fpu = {val};
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return mp_obj_new_float(fpu.f);
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#endif
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2014-04-19 22:19:10 -04:00
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} else if (is_signed(val_type)) {
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2014-09-10 17:10:33 -04:00
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if ((long long)MP_SMALL_INT_MIN <= val && val <= (long long)MP_SMALL_INT_MAX) {
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return mp_obj_new_int((mp_int_t)val);
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} else {
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return mp_obj_new_int_from_ll(val);
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}
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2014-04-10 15:19:32 -04:00
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} else {
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2014-09-10 17:10:33 -04:00
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if ((unsigned long long)val <= (unsigned long long)MP_SMALL_INT_MAX) {
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return mp_obj_new_int_from_uint((mp_uint_t)val);
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} else {
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return mp_obj_new_int_from_ull(val);
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}
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2014-04-10 15:19:32 -04:00
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}
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2014-04-09 20:45:38 -04:00
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}
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2014-10-06 11:05:35 -04:00
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void mp_binary_set_int(mp_uint_t val_sz, bool big_endian, byte *dest, mp_uint_t val) {
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if (MP_ENDIANNESS_LITTLE && !big_endian) {
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memcpy(dest, &val, val_sz);
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} else if (MP_ENDIANNESS_BIG && big_endian) {
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// only copy the least-significant val_sz bytes
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memcpy(dest, (byte*)&val + sizeof(mp_uint_t) - val_sz, val_sz);
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2014-07-05 16:43:00 -04:00
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} else {
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2014-10-06 11:05:35 -04:00
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const byte *src;
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if (MP_ENDIANNESS_LITTLE) {
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src = (const byte*)&val + val_sz;
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} else {
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src = (const byte*)&val + sizeof(mp_uint_t);
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}
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while (val_sz--) {
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*dest++ = *--src;
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}
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2014-07-05 16:43:00 -04:00
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}
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}
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2014-04-18 20:13:15 -04:00
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void mp_binary_set_val(char struct_type, char val_type, mp_obj_t val_in, byte **ptr) {
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byte *p = *ptr;
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2014-08-30 09:59:21 -04:00
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mp_uint_t align;
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2014-04-18 20:13:15 -04:00
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2015-05-10 07:04:38 -04:00
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size_t size = mp_binary_get_size(struct_type, val_type, &align);
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2014-04-18 20:13:15 -04:00
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if (struct_type == '@') {
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// Make pointer aligned
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2014-07-03 08:25:24 -04:00
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p = (byte*)(((mp_uint_t)p + align - 1) & ~((mp_uint_t)align - 1));
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2014-10-06 11:05:35 -04:00
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if (MP_ENDIANNESS_LITTLE) {
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struct_type = '<';
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} else {
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struct_type = '>';
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}
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2014-04-18 20:13:15 -04:00
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}
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2014-06-25 15:25:53 -04:00
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*ptr = p + size;
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2014-04-18 20:13:15 -04:00
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2014-10-06 11:05:35 -04:00
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mp_uint_t val;
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2014-04-19 22:19:10 -04:00
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switch (val_type) {
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case 'O':
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2014-10-06 11:05:35 -04:00
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val = (mp_uint_t)val_in;
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2014-04-19 22:19:10 -04:00
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break;
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2015-01-24 21:50:34 -05:00
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#if MICROPY_PY_BUILTINS_FLOAT
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case 'f': {
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union { uint32_t i; float f; } fp_sp;
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fp_sp.f = mp_obj_get_float(val_in);
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val = fp_sp.i;
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break;
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}
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case 'd': {
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union { uint64_t i64; uint32_t i32[2]; double f; } fp_dp;
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fp_dp.f = mp_obj_get_float(val_in);
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if (BYTES_PER_WORD == 8) {
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val = fp_dp.i64;
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} else {
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int be = struct_type == '>';
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mp_binary_set_int(sizeof(uint32_t), be, p, fp_dp.i32[MP_ENDIANNESS_BIG ^ be]);
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p += sizeof(uint32_t);
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val = fp_dp.i32[MP_ENDIANNESS_LITTLE ^ be];
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}
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break;
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}
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#endif
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2014-04-19 22:19:10 -04:00
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default:
|
2015-04-25 18:16:39 -04:00
|
|
|
#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
|
2014-12-05 18:13:52 -05:00
|
|
|
if (MP_OBJ_IS_TYPE(val_in, &mp_type_int)) {
|
2015-04-25 18:16:39 -04:00
|
|
|
mp_obj_int_to_bytes_impl(val_in, struct_type == '>', size, p);
|
|
|
|
return;
|
|
|
|
} else
|
|
|
|
#endif
|
|
|
|
{
|
2014-12-05 18:13:52 -05:00
|
|
|
val = mp_obj_get_int(val_in);
|
2015-04-25 18:51:14 -04:00
|
|
|
// sign extend if needed
|
|
|
|
if (BYTES_PER_WORD < 8 && size > sizeof(val) && is_signed(val_type) && (mp_int_t)val < 0) {
|
|
|
|
memset(p + sizeof(val), 0xff, size - sizeof(val));
|
|
|
|
}
|
2014-12-05 18:13:52 -05:00
|
|
|
}
|
2014-04-19 22:19:10 -04:00
|
|
|
}
|
|
|
|
|
2015-01-16 12:47:07 -05:00
|
|
|
mp_binary_set_int(MIN((size_t)size, sizeof(val)), struct_type == '>', p, val);
|
2014-04-18 20:13:15 -04:00
|
|
|
}
|
|
|
|
|
2014-10-03 13:44:14 -04:00
|
|
|
void mp_binary_set_val_array(char typecode, void *p, mp_uint_t index, mp_obj_t val_in) {
|
2014-04-18 18:28:12 -04:00
|
|
|
switch (typecode) {
|
2014-06-01 08:32:54 -04:00
|
|
|
#if MICROPY_PY_BUILTINS_FLOAT
|
2014-04-18 18:28:12 -04:00
|
|
|
case 'f':
|
2014-11-21 13:16:25 -05:00
|
|
|
((float*)p)[index] = mp_obj_get_float(val_in);
|
2014-04-18 18:28:12 -04:00
|
|
|
break;
|
|
|
|
case 'd':
|
2014-11-21 13:16:25 -05:00
|
|
|
((double*)p)[index] = mp_obj_get_float(val_in);
|
2014-04-18 18:28:12 -04:00
|
|
|
break;
|
|
|
|
#endif
|
2015-03-05 15:57:36 -05:00
|
|
|
// Extension to CPython: array of objects
|
|
|
|
case 'O':
|
|
|
|
((mp_obj_t*)p)[index] = val_in;
|
|
|
|
break;
|
2014-04-18 18:28:12 -04:00
|
|
|
default:
|
2015-09-01 11:25:29 -04:00
|
|
|
#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
|
|
|
|
if ((typecode | 0x20) == 'q' && MP_OBJ_IS_TYPE(val_in, &mp_type_int)) {
|
|
|
|
mp_obj_int_to_bytes_impl(val_in, MP_ENDIANNESS_BIG,
|
|
|
|
sizeof(long long), (byte*)&((long long*)p)[index]);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
#endif
|
2014-04-18 18:28:12 -04:00
|
|
|
mp_binary_set_val_array_from_int(typecode, p, index, mp_obj_get_int(val_in));
|
2014-02-14 10:16:35 -05:00
|
|
|
}
|
2014-04-18 18:28:12 -04:00
|
|
|
}
|
2014-02-14 10:16:35 -05:00
|
|
|
|
2014-10-03 13:44:14 -04:00
|
|
|
void mp_binary_set_val_array_from_int(char typecode, void *p, mp_uint_t index, mp_int_t val) {
|
2014-02-14 10:16:35 -05:00
|
|
|
switch (typecode) {
|
|
|
|
case 'b':
|
2015-01-23 20:18:10 -05:00
|
|
|
((signed char*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
case BYTEARRAY_TYPECODE:
|
|
|
|
case 'B':
|
2015-01-23 20:18:10 -05:00
|
|
|
((unsigned char*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
case 'h':
|
2015-01-23 20:18:10 -05:00
|
|
|
((short*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
case 'H':
|
2015-01-23 20:18:10 -05:00
|
|
|
((unsigned short*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
case 'i':
|
2015-01-23 20:18:10 -05:00
|
|
|
((int*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
case 'I':
|
2015-01-23 20:18:10 -05:00
|
|
|
((unsigned int*)p)[index] = val;
|
|
|
|
break;
|
|
|
|
case 'l':
|
|
|
|
((long*)p)[index] = val;
|
|
|
|
break;
|
2014-02-14 10:16:35 -05:00
|
|
|
case 'L':
|
2015-01-23 20:18:10 -05:00
|
|
|
((unsigned long*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
2015-09-01 11:25:29 -04:00
|
|
|
#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
|
2014-02-14 10:16:35 -05:00
|
|
|
case 'q':
|
|
|
|
((long long*)p)[index] = val;
|
2015-09-01 11:25:29 -04:00
|
|
|
case 'Q':
|
|
|
|
((unsigned long long*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
2015-09-01 11:25:29 -04:00
|
|
|
#endif
|
2014-06-01 08:32:54 -04:00
|
|
|
#if MICROPY_PY_BUILTINS_FLOAT
|
2014-02-14 10:16:35 -05:00
|
|
|
case 'f':
|
2014-04-18 18:28:12 -04:00
|
|
|
((float*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
case 'd':
|
2014-04-18 18:28:12 -04:00
|
|
|
((double*)p)[index] = val;
|
2014-02-14 10:16:35 -05:00
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
}
|