424 lines
14 KiB
C
424 lines
14 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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* Copyright (c) 2014 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 <string.h>
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#include <assert.h>
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime0.h"
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#include "runtime.h"
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#include "binary.h"
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#if MICROPY_PY_ARRAY || MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_BUILTINS_MEMORYVIEW
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typedef struct _mp_obj_array_t {
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mp_obj_base_t base;
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mp_uint_t typecode : 8;
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// free is number of unused elements after len used elements
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// alloc size = len + free
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// for memoryview, free=0 is read-only, free=1 is read-write
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mp_uint_t free : (8 * sizeof(mp_uint_t) - 8);
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mp_uint_t len; // in elements
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void *items;
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} mp_obj_array_t;
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STATIC mp_obj_t array_iterator_new(mp_obj_t array_in);
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STATIC mp_obj_t array_append(mp_obj_t self_in, mp_obj_t arg);
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STATIC mp_int_t array_get_buffer(mp_obj_t o_in, mp_buffer_info_t *bufinfo, mp_uint_t flags);
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/******************************************************************************/
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// array
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#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
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STATIC void array_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
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mp_obj_array_t *o = o_in;
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if (o->typecode == BYTEARRAY_TYPECODE) {
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print(env, "bytearray(b");
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mp_str_print_quoted(print, env, o->items, o->len, true);
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} else {
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print(env, "array('%c'", o->typecode);
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if (o->len > 0) {
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print(env, ", [");
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for (mp_uint_t i = 0; i < o->len; i++) {
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if (i > 0) {
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print(env, ", ");
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}
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mp_obj_print_helper(print, env, mp_binary_get_val_array(o->typecode, o->items, i), PRINT_REPR);
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}
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print(env, "]");
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}
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}
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print(env, ")");
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}
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#endif
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#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
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STATIC mp_obj_array_t *array_new(char typecode, mp_uint_t n) {
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int typecode_size = mp_binary_get_size('@', typecode, NULL);
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if (typecode_size <= 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "bad typecode"));
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}
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mp_obj_array_t *o = m_new_obj(mp_obj_array_t);
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#if MICROPY_PY_BUILTINS_BYTEARRAY && MICROPY_PY_ARRAY
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o->base.type = (typecode == BYTEARRAY_TYPECODE) ? &mp_type_bytearray : &mp_type_array;
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#elif MICROPY_PY_BUILTINS_BYTEARRAY
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o->base.type = &mp_type_bytearray;
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#else
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o->base.type = &mp_type_array;
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#endif
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o->typecode = typecode;
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o->free = 0;
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o->len = n;
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o->items = m_malloc(typecode_size * o->len);
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return o;
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}
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#endif
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#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
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STATIC mp_obj_t array_construct(char typecode, mp_obj_t initializer) {
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uint len;
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// Try to create array of exact len if initializer len is known
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mp_obj_t len_in = mp_obj_len_maybe(initializer);
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if (len_in == MP_OBJ_NULL) {
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len = 0;
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} else {
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len = MP_OBJ_SMALL_INT_VALUE(len_in);
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}
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mp_obj_array_t *array = array_new(typecode, len);
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mp_obj_t iterable = mp_getiter(initializer);
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mp_obj_t item;
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mp_uint_t i = 0;
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while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
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if (len == 0) {
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array_append(array, item);
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} else {
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mp_binary_set_val_array(typecode, array->items, i++, item);
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}
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}
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return array;
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}
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#endif
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#if MICROPY_PY_ARRAY
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STATIC mp_obj_t array_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 2, false);
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// get typecode
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mp_uint_t l;
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const char *typecode = mp_obj_str_get_data(args[0], &l);
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if (n_args == 1) {
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// 1 arg: make an empty array
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return array_new(*typecode, 0);
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} else {
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// 2 args: construct the array from the given iterator
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return array_construct(*typecode, args[1]);
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}
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}
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#endif
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#if MICROPY_PY_BUILTINS_BYTEARRAY
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STATIC mp_obj_t bytearray_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 0, 1, false);
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if (n_args == 0) {
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// no args: construct an empty bytearray
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return array_new(BYTEARRAY_TYPECODE, 0);
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} else if (MP_OBJ_IS_SMALL_INT(args[0])) {
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// 1 arg, an integer: construct a blank bytearray of that length
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uint len = MP_OBJ_SMALL_INT_VALUE(args[0]);
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mp_obj_array_t *o = array_new(BYTEARRAY_TYPECODE, len);
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memset(o->items, 0, len);
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return o;
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} else {
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// 1 arg, an iterator: construct the bytearray from that
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return array_construct(BYTEARRAY_TYPECODE, args[0]);
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}
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}
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#endif
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#if MICROPY_PY_BUILTINS_MEMORYVIEW
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STATIC mp_obj_t memoryview_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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// TODO possibly allow memoryview constructor to take start/stop so that one
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// can do memoryview(b, 4, 8) instead of memoryview(b)[4:8] (uses less RAM)
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);
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mp_obj_array_t *self = m_new_obj(mp_obj_array_t);
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self->base.type = type_in;
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self->typecode = bufinfo.typecode;
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self->free = 0;
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self->len = bufinfo.len / mp_binary_get_size('@', bufinfo.typecode, NULL); // element len
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self->items = bufinfo.buf;
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// test if the object can be written to
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if (mp_get_buffer(args[0], &bufinfo, MP_BUFFER_RW)) {
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self->free = 1; // used to indicate writable buffer
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}
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return self;
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}
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#endif
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STATIC mp_obj_t array_unary_op(mp_uint_t op, mp_obj_t o_in) {
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mp_obj_array_t *o = o_in;
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switch (op) {
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case MP_UNARY_OP_BOOL: return MP_BOOL(o->len != 0);
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case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(o->len);
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default: return MP_OBJ_NULL; // op not supported
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}
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}
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STATIC mp_obj_t array_binary_op(mp_uint_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
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switch (op) {
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case MP_BINARY_OP_EQUAL: {
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mp_buffer_info_t lhs_bufinfo;
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mp_buffer_info_t rhs_bufinfo;
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array_get_buffer(lhs_in, &lhs_bufinfo, MP_BUFFER_READ);
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if (!mp_get_buffer(rhs_in, &rhs_bufinfo, MP_BUFFER_READ)) {
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return mp_const_false;
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}
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return MP_BOOL(mp_seq_cmp_bytes(op, lhs_bufinfo.buf, lhs_bufinfo.len, rhs_bufinfo.buf, rhs_bufinfo.len));
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}
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default:
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return MP_OBJ_NULL; // op not supported
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}
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}
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STATIC mp_obj_t array_append(mp_obj_t self_in, mp_obj_t arg) {
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assert(MP_OBJ_IS_TYPE(self_in, &mp_type_array) || MP_OBJ_IS_TYPE(self_in, &mp_type_bytearray));
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mp_obj_array_t *self = self_in;
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if (self->free == 0) {
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int item_sz = mp_binary_get_size('@', self->typecode, NULL);
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// TODO: alloc policy
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self->free = 8;
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self->items = m_realloc(self->items, item_sz * self->len, item_sz * (self->len + self->free));
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mp_seq_clear(self->items, self->len + 1, self->len + self->free, item_sz);
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}
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mp_binary_set_val_array(self->typecode, self->items, self->len++, arg);
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self->free--;
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return mp_const_none; // return None, as per CPython
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(array_append_obj, array_append);
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STATIC mp_obj_t array_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_obj_t value) {
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if (value == MP_OBJ_NULL) {
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// delete item
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// TODO implement
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// TODO: confirmed that both bytearray and array.array support
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// slice deletion
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return MP_OBJ_NULL; // op not supported
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} else {
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mp_obj_array_t *o = self_in;
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if (0) {
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#if MICROPY_PY_BUILTINS_SLICE
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} else if (MP_OBJ_IS_TYPE(index_in, &mp_type_slice)) {
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if (value != MP_OBJ_SENTINEL) {
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// Only getting a slice is suported so far, not assignment
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// TODO: confirmed that both bytearray and array.array support
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// slice assignment (incl. of different size)
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return MP_OBJ_NULL; // op not supported
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}
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mp_bound_slice_t slice;
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if (!mp_seq_get_fast_slice_indexes(o->len, index_in, &slice)) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_NotImplementedError,
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"only slices with step=1 (aka None) are supported"));
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}
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mp_obj_array_t *res;
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int sz = mp_binary_get_size('@', o->typecode, NULL);
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assert(sz > 0);
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if (0) {
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// dummy
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#if MICROPY_PY_BUILTINS_MEMORYVIEW
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} else if (o->base.type == &mp_type_memoryview) {
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res = m_new_obj(mp_obj_array_t);
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*res = *o;
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res->len = slice.stop - slice.start;
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res->items += slice.start * sz;
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#endif
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} else {
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res = array_new(o->typecode, slice.stop - slice.start);
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memcpy(res->items, o->items + slice.start * sz, (slice.stop - slice.start) * sz);
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}
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return res;
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#endif
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} else {
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mp_uint_t index = mp_get_index(o->base.type, o->len, index_in, false);
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if (value == MP_OBJ_SENTINEL) {
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// load
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return mp_binary_get_val_array(o->typecode, o->items, index);
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} else {
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// store
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#if MICROPY_PY_BUILTINS_MEMORYVIEW
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if (o->base.type == &mp_type_memoryview && o->free == 0) {
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// read-only memoryview
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return MP_OBJ_NULL;
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}
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#endif
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mp_binary_set_val_array(o->typecode, o->items, index, value);
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return mp_const_none;
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}
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}
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}
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}
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STATIC mp_int_t array_get_buffer(mp_obj_t o_in, mp_buffer_info_t *bufinfo, mp_uint_t flags) {
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mp_obj_array_t *o = o_in;
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#if MICROPY_PY_BUILTINS_MEMORYVIEW
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if (o->base.type == &mp_type_memoryview && o->free == 0 && (flags & MP_BUFFER_WRITE)) {
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// read-only memoryview
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return 1;
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}
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#endif
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bufinfo->buf = o->items;
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bufinfo->len = o->len * mp_binary_get_size('@', o->typecode, NULL);
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bufinfo->typecode = o->typecode;
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return 0;
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}
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#if MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_ARRAY
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STATIC const mp_map_elem_t array_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_append), (mp_obj_t)&array_append_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(array_locals_dict, array_locals_dict_table);
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#endif
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#if MICROPY_PY_ARRAY
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const mp_obj_type_t mp_type_array = {
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{ &mp_type_type },
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.name = MP_QSTR_array,
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.print = array_print,
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.make_new = array_make_new,
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.getiter = array_iterator_new,
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.unary_op = array_unary_op,
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.binary_op = array_binary_op,
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.subscr = array_subscr,
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.buffer_p = { .get_buffer = array_get_buffer },
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.locals_dict = (mp_obj_t)&array_locals_dict,
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};
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#endif
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#if MICROPY_PY_BUILTINS_BYTEARRAY
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const mp_obj_type_t mp_type_bytearray = {
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{ &mp_type_type },
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.name = MP_QSTR_bytearray,
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.print = array_print,
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.make_new = bytearray_make_new,
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.getiter = array_iterator_new,
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.unary_op = array_unary_op,
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.binary_op = array_binary_op,
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.subscr = array_subscr,
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.buffer_p = { .get_buffer = array_get_buffer },
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.locals_dict = (mp_obj_t)&array_locals_dict,
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};
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#endif
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#if MICROPY_PY_BUILTINS_MEMORYVIEW
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const mp_obj_type_t mp_type_memoryview = {
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{ &mp_type_type },
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.name = MP_QSTR_memoryview,
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.make_new = memoryview_make_new,
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.getiter = array_iterator_new,
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.unary_op = array_unary_op,
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.binary_op = array_binary_op,
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.subscr = array_subscr,
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.buffer_p = { .get_buffer = array_get_buffer },
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};
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#endif
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/* unused
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mp_uint_t mp_obj_array_len(mp_obj_t self_in) {
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return ((mp_obj_array_t *)self_in)->len;
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}
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*/
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#if MICROPY_PY_BUILTINS_BYTEARRAY
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mp_obj_t mp_obj_new_bytearray(mp_uint_t n, void *items) {
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mp_obj_array_t *o = array_new(BYTEARRAY_TYPECODE, n);
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memcpy(o->items, items, n);
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return o;
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}
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// Create bytearray which references specified memory area
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mp_obj_t mp_obj_new_bytearray_by_ref(mp_uint_t n, void *items) {
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mp_obj_array_t *o = m_new_obj(mp_obj_array_t);
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o->base.type = &mp_type_bytearray;
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o->typecode = BYTEARRAY_TYPECODE;
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o->free = 0;
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o->len = n;
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o->items = items;
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return o;
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}
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#endif
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/******************************************************************************/
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// array iterator
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typedef struct _mp_obj_array_it_t {
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mp_obj_base_t base;
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mp_obj_array_t *array;
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mp_uint_t cur;
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} mp_obj_array_it_t;
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STATIC mp_obj_t array_it_iternext(mp_obj_t self_in) {
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mp_obj_array_it_t *self = self_in;
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if (self->cur < self->array->len) {
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return mp_binary_get_val_array(self->array->typecode, self->array->items, self->cur++);
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} else {
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return MP_OBJ_STOP_ITERATION;
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}
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}
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STATIC const mp_obj_type_t array_it_type = {
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{ &mp_type_type },
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.name = MP_QSTR_iterator,
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.getiter = mp_identity,
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.iternext = array_it_iternext,
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};
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STATIC mp_obj_t array_iterator_new(mp_obj_t array_in) {
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mp_obj_array_t *array = array_in;
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mp_obj_array_it_t *o = m_new_obj(mp_obj_array_it_t);
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o->base.type = &array_it_type;
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o->array = array;
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o->cur = 0;
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return o;
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}
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#endif // MICROPY_PY_ARRAY || MICROPY_PY_BUILTINS_BYTEARRAY || MICROPY_PY_BUILTINS_MEMORYVIEW
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