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/.
140 lines
4.5 KiB
C
140 lines
4.5 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 <assert.h>
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#include <string.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 "builtin.h"
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#include "objtuple.h"
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#include "objstr.h"
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#include "binary.h"
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#if MICROPY_ENABLE_MOD_STRUCT
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STATIC char get_fmt_type(const char **fmt) {
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char t = **fmt;
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switch (t) {
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case '!':
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t = '>';
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break;
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case '@':
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case '=':
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case '<':
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case '>':
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break;
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default:
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return '@';
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}
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// Skip type char
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(*fmt)++;
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return t;
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}
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STATIC uint calcsize_items(const char *fmt) {
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// TODO
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return strlen(fmt);
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}
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STATIC mp_obj_t struct_calcsize(mp_obj_t fmt_in) {
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const char *fmt = mp_obj_str_get_str(fmt_in);
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char fmt_type = get_fmt_type(&fmt);
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machine_uint_t size;
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for (size = 0; *fmt; fmt++) {
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uint align;
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int sz = mp_binary_get_size(fmt_type, *fmt, &align);
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// TODO
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assert(sz != -1);
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// Apply alignment
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size = (size + align - 1) & ~(align - 1);
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size += sz;
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}
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return MP_OBJ_NEW_SMALL_INT(size);
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}
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MP_DEFINE_CONST_FUN_OBJ_1(struct_calcsize_obj, struct_calcsize);
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STATIC mp_obj_t struct_unpack(mp_obj_t fmt_in, mp_obj_t data_in) {
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// TODO: "The buffer must contain exactly the amount of data required by the format (len(bytes) must equal calcsize(fmt))."
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const char *fmt = mp_obj_str_get_str(fmt_in);
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char fmt_type = get_fmt_type(&fmt);
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uint size = calcsize_items(fmt);
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mp_obj_tuple_t *res = mp_obj_new_tuple(size, NULL);
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(data_in, &bufinfo, MP_BUFFER_READ);
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byte *p = bufinfo.buf;
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for (uint i = 0; i < size; i++) {
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mp_obj_t item = mp_binary_get_val(fmt_type, *fmt++, &p);
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res->items[i] = item;
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}
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return res;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(struct_unpack_obj, struct_unpack);
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STATIC mp_obj_t struct_pack(uint n_args, mp_obj_t *args) {
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// TODO: "The arguments must match the values required by the format exactly."
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const char *fmt = mp_obj_str_get_str(args[0]);
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char fmt_type = get_fmt_type(&fmt);
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int size = MP_OBJ_SMALL_INT_VALUE(struct_calcsize(args[0]));
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byte *p;
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mp_obj_t res = mp_obj_str_builder_start(&mp_type_bytes, size, &p);
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memset(p, 0, size);
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for (uint i = 1; i < n_args; i++) {
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mp_binary_set_val(fmt_type, *fmt++, args[i], &p);
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}
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return res;
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(struct_pack_obj, 1, -1, struct_pack);
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STATIC const mp_map_elem_t mp_module_struct_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_struct) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_calcsize), (mp_obj_t)&struct_calcsize_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_pack), (mp_obj_t)&struct_pack_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_unpack), (mp_obj_t)&struct_unpack_obj },
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};
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STATIC const mp_obj_dict_t mp_module_struct_globals = {
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.base = {&mp_type_dict},
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.map = {
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.all_keys_are_qstrs = 1,
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.table_is_fixed_array = 1,
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.used = ARRAY_SIZE(mp_module_struct_globals_table),
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.alloc = ARRAY_SIZE(mp_module_struct_globals_table),
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.table = (mp_map_elem_t*)mp_module_struct_globals_table,
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},
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};
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const mp_obj_module_t mp_module_struct = {
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.base = { &mp_type_module },
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.name = MP_QSTR_struct,
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.globals = (mp_obj_dict_t*)&mp_module_struct_globals,
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};
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#endif
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