04b9147e15
Blanket wide to all .c and .h files. Some files originating from ST are difficult to deal with (license wise) so it was left out of those. Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
273 lines
7.8 KiB
C
273 lines
7.8 KiB
C
/*
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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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#include <stdint.h>
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#include <stdlib.h>
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#include <assert.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "binary.h"
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// Helpers to work with binary-encoded data
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int mp_binary_get_size(char struct_type, char val_type, uint *palign) {
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int size = 0;
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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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}
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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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align = size = sizeof(short); break;
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case 'i': case 'I':
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align = size = sizeof(int); break;
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case 'l': case 'L':
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align = size = sizeof(long); break;
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case 'q': case 'Q':
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// TODO: This is for x86
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align = sizeof(int); size = sizeof(long long); break;
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case 'P': case 'O':
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align = size = sizeof(void*); break;
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}
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}
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}
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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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}
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mp_obj_t mp_binary_get_val_array(char typecode, void *p, int index) {
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machine_int_t val = 0;
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switch (typecode) {
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case 'b':
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val = ((int8_t*)p)[index];
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break;
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case BYTEARRAY_TYPECODE:
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case 'B':
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val = ((uint8_t*)p)[index];
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break;
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case 'h':
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val = ((int16_t*)p)[index];
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break;
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case 'H':
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val = ((uint16_t*)p)[index];
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break;
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case 'i':
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case 'l':
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return mp_obj_new_int(((int32_t*)p)[index]);
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case 'I':
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case 'L':
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return mp_obj_new_int_from_uint(((uint32_t*)p)[index]);
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#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
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case 'q':
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case 'Q':
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// TODO: Explode API more to cover signedness
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return mp_obj_new_int_from_ll(((long long*)p)[index]);
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#endif
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#if MICROPY_ENABLE_FLOAT
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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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}
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return MP_OBJ_NEW_SMALL_INT(val);
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}
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#define is_signed(typecode) (typecode > 'Z')
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mp_obj_t mp_binary_get_val(char struct_type, char val_type, byte **ptr) {
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byte *p = *ptr;
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uint align;
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int size = mp_binary_get_size(struct_type, val_type, &align);
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if (struct_type == '@') {
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// Make pointer aligned
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p = (byte*)(((machine_uint_t)p + align - 1) & ~(align - 1));
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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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}
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int delta;
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if (struct_type == '<') {
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delta = -1;
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p += size - 1;
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} else {
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delta = 1;
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}
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machine_int_t val = 0;
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if (is_signed(val_type) && *p & 0x80) {
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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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val |= *p;
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p += delta;
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}
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*ptr += size;
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if (val_type == 'O') {
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return (mp_obj_t)val;
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} else if (is_signed(val_type)) {
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return mp_obj_new_int(val);
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} else {
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return mp_obj_new_int_from_uint(val);
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}
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}
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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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uint align;
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int size = mp_binary_get_size(struct_type, val_type, &align);
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if (struct_type == '@') {
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// Make pointer aligned
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p = (byte*)(((machine_uint_t)p + align - 1) & ~(align - 1));
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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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}
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#if MP_ENDIANNESS_BIG
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#error Not implemented
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#endif
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machine_int_t val;
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byte *in = (byte*)&val;
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switch (val_type) {
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case 'O':
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in = (byte*)&val_in;
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break;
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default:
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val = mp_obj_get_int(val_in);
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}
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int in_delta, out_delta;
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uint val_sz = MIN(size, sizeof(val));
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if (struct_type == '>') {
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in_delta = -1;
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out_delta = 1;
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in += val_sz - 1;
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} else {
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in_delta = out_delta = 1;
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}
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for (uint i = val_sz; i > 0; i--) {
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*p = *in;
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p += out_delta;
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in += in_delta;
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}
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*ptr += size;
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}
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void mp_binary_set_val_array(char typecode, void *p, int index, mp_obj_t val_in) {
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switch (typecode) {
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#if MICROPY_ENABLE_FLOAT
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case 'f':
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((float*)p)[index] = mp_obj_float_get(val_in);
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break;
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case 'd':
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((double*)p)[index] = mp_obj_float_get(val_in);
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break;
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#endif
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default:
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mp_binary_set_val_array_from_int(typecode, p, index, mp_obj_get_int(val_in));
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}
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}
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void mp_binary_set_val_array_from_int(char typecode, void *p, int index, machine_int_t val) {
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switch (typecode) {
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case 'b':
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((int8_t*)p)[index] = val;
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break;
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case BYTEARRAY_TYPECODE:
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case 'B':
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val = ((uint8_t*)p)[index] = val;
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break;
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case 'h':
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val = ((int16_t*)p)[index] = val;
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break;
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case 'H':
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val = ((uint16_t*)p)[index] = val;
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break;
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case 'i':
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case 'l':
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((int32_t*)p)[index] = val;
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break;
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case 'I':
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case 'L':
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((uint32_t*)p)[index] = val;
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break;
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#if MICROPY_LONGINT_IMPL != MICROPY_LONGINT_IMPL_NONE
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case 'q':
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case 'Q':
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assert(0);
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((long long*)p)[index] = val;
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break;
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#endif
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#if MICROPY_ENABLE_FLOAT
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case 'f':
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((float*)p)[index] = val;
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break;
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case 'd':
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((double*)p)[index] = val;
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break;
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#endif
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}
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}
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