circuitpython/py/nativeglue.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "py/runtime.h"
#include "py/smallint.h"
#include "py/emitglue.h"
#include "py/bc.h"
#if MICROPY_DEBUG_VERBOSE // print debugging info
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#endif
#if MICROPY_EMIT_NATIVE
// convert a MicroPython object to a valid native value based on type
mp_uint_t mp_convert_obj_to_native(mp_obj_t obj, mp_uint_t type) {
DEBUG_printf("mp_convert_obj_to_native(%p, " UINT_FMT ")\n", obj, type);
switch (type & 0xf) {
case MP_NATIVE_TYPE_OBJ: return (mp_uint_t)obj;
case MP_NATIVE_TYPE_BOOL:
case MP_NATIVE_TYPE_INT:
case MP_NATIVE_TYPE_UINT: return mp_obj_get_int_truncated(obj);
default: { // cast obj to a pointer
mp_buffer_info_t bufinfo;
if (mp_get_buffer(obj, &bufinfo, MP_BUFFER_RW)) {
return (mp_uint_t)bufinfo.buf;
} else {
// assume obj is an integer that represents an address
return mp_obj_get_int_truncated(obj);
}
}
}
}
#endif
#if MICROPY_EMIT_NATIVE || MICROPY_EMIT_INLINE_ASM
// convert a native value to a MicroPython object based on type
mp_obj_t mp_convert_native_to_obj(mp_uint_t val, mp_uint_t type) {
DEBUG_printf("mp_convert_native_to_obj(" UINT_FMT ", " UINT_FMT ")\n", val, type);
switch (type & 0xf) {
case MP_NATIVE_TYPE_OBJ: return (mp_obj_t)val;
case MP_NATIVE_TYPE_BOOL: return mp_obj_new_bool(val);
case MP_NATIVE_TYPE_INT: return mp_obj_new_int(val);
case MP_NATIVE_TYPE_UINT: return mp_obj_new_int_from_uint(val);
default: // a pointer
// we return just the value of the pointer as an integer
return mp_obj_new_int_from_uint(val);
}
}
#endif
#if MICROPY_EMIT_NATIVE
// wrapper that accepts n_args and n_kw in one argument
// (native emitter can only pass at most 3 arguments to a function)
mp_obj_t mp_native_call_function_n_kw(mp_obj_t fun_in, size_t n_args_kw, const mp_obj_t *args) {
return mp_call_function_n_kw(fun_in, n_args_kw & 0xff, (n_args_kw >> 8) & 0xff, args);
}
// wrapper that makes raise obj and raises it
// END_FINALLY opcode requires that we don't raise if o==None
void mp_native_raise(mp_obj_t o) {
if (o != mp_const_none) {
nlr_raise(mp_make_raise_obj(o));
}
}
// wrapper that handles iterator buffer
STATIC mp_obj_t mp_native_getiter(mp_obj_t obj, mp_obj_iter_buf_t *iter) {
if (iter == NULL) {
return mp_getiter(obj, NULL);
} else {
obj = mp_getiter(obj, iter);
if (obj != MP_OBJ_FROM_PTR(iter)) {
// Iterator didn't use the stack so indicate that with MP_OBJ_NULL.
iter->base.type = MP_OBJ_NULL;
iter->buf[0] = obj;
}
return NULL;
}
}
// wrapper that handles iterator buffer
STATIC mp_obj_t mp_native_iternext(mp_obj_iter_buf_t *iter) {
mp_obj_t obj;
if (iter->base.type == MP_OBJ_NULL) {
obj = iter->buf[0];
} else {
obj = MP_OBJ_FROM_PTR(iter);
}
return mp_iternext(obj);
}
// these must correspond to the respective enum in runtime0.h
void *const mp_fun_table[MP_F_NUMBER_OF] = {
mp_convert_obj_to_native,
mp_convert_native_to_obj,
mp_load_name,
mp_load_global,
mp_load_build_class,
mp_load_attr,
mp_load_method,
mp_load_super_method,
mp_store_name,
mp_store_global,
mp_store_attr,
mp_obj_subscr,
mp_obj_is_true,
mp_unary_op,
mp_binary_op,
mp_obj_new_tuple,
mp_obj_new_list,
mp_obj_list_append,
mp_obj_new_dict,
mp_obj_dict_store,
#if MICROPY_PY_BUILTINS_SET
mp_obj_set_store,
mp_obj_new_set,
#endif
mp_make_function_from_raw_code,
mp_native_call_function_n_kw,
mp_call_method_n_kw,
mp_call_method_n_kw_var,
mp_native_getiter,
mp_native_iternext,
nlr_push,
nlr_pop,
mp_native_raise,
mp_import_name,
mp_import_from,
mp_import_all,
#if MICROPY_PY_BUILTINS_SLICE
mp_obj_new_slice,
#endif
mp_unpack_sequence,
mp_unpack_ex,
mp_delete_name,
mp_delete_global,
mp_obj_new_cell,
mp_make_closure_from_raw_code,
mp_setup_code_state,
mp_small_int_floor_divide,
mp_small_int_modulo,
};
/*
void mp_f_vector(mp_fun_kind_t fun_kind) {
(mp_f_table[fun_kind])();
}
*/
#endif // MICROPY_EMIT_NATIVE