296 lines
9.4 KiB
C
296 lines
9.4 KiB
C
/*
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* This file is part of the MicroPython 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 <stdlib.h>
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#include <string.h>
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#include "py/smallint.h"
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#include "py/objint.h"
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#include "py/runtime.h"
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#if MICROPY_PY_BUILTINS_FLOAT
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#include <math.h>
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#endif
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#if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_LONGLONG
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#if MICROPY_PY_SYS_MAXSIZE
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// Export value for sys.maxsize
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const mp_obj_int_t mp_sys_maxsize_obj = {{&mp_type_int}, MP_SSIZE_MAX};
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#endif
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mp_obj_t mp_obj_int_from_bytes_impl(bool big_endian, size_t len, const byte *buf) {
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int delta = 1;
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if (!big_endian) {
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buf += len - 1;
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delta = -1;
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}
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mp_longint_impl_t value = 0;
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for (; len--; buf += delta) {
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value = (value << 8) | *buf;
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}
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return mp_obj_new_int_from_ll(value);
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}
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void mp_obj_int_to_bytes_impl(mp_obj_t self_in, bool big_endian, size_t len, byte *buf) {
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assert(mp_obj_is_exact_type(self_in, &mp_type_int));
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mp_obj_int_t *self = self_in;
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long long val = self->val;
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if (big_endian) {
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byte *b = buf + len;
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while (b > buf) {
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*--b = val;
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val >>= 8;
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}
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} else {
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for (; len > 0; --len) {
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*buf++ = val;
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val >>= 8;
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}
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}
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}
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int mp_obj_int_sign(mp_obj_t self_in) {
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mp_longint_impl_t val;
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if (mp_obj_is_small_int(self_in)) {
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val = MP_OBJ_SMALL_INT_VALUE(self_in);
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} else {
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mp_obj_int_t *self = self_in;
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val = self->val;
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}
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if (val < 0) {
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return -1;
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} else if (val > 0) {
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return 1;
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} else {
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return 0;
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}
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}
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mp_obj_t mp_obj_int_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
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mp_obj_int_t *o = o_in;
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switch (op) {
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case MP_UNARY_OP_BOOL:
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return mp_obj_new_bool(o->val != 0);
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// truncate value to fit in mp_int_t, which gives the same hash as
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// small int if the value fits without truncation
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case MP_UNARY_OP_HASH:
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return MP_OBJ_NEW_SMALL_INT((mp_int_t)o->val);
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case MP_UNARY_OP_POSITIVE:
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return o_in;
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case MP_UNARY_OP_NEGATIVE:
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return mp_obj_new_int_from_ll(-o->val);
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case MP_UNARY_OP_INVERT:
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return mp_obj_new_int_from_ll(~o->val);
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case MP_UNARY_OP_ABS: {
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mp_obj_int_t *self = MP_OBJ_TO_PTR(o_in);
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if (self->val >= 0) {
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return o_in;
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}
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self = mp_obj_new_int_from_ll(self->val);
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// TODO could overflow long long
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self->val = -self->val;
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return MP_OBJ_FROM_PTR(self);
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}
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case MP_UNARY_OP_INT_MAYBE:
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return o_in;
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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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mp_obj_t mp_obj_int_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
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long long lhs_val;
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long long rhs_val;
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if (mp_obj_is_small_int(lhs_in)) {
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lhs_val = MP_OBJ_SMALL_INT_VALUE(lhs_in);
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} else {
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assert(mp_obj_is_exact_type(lhs_in, &mp_type_int));
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lhs_val = ((mp_obj_int_t *)lhs_in)->val;
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}
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if (mp_obj_is_small_int(rhs_in)) {
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rhs_val = MP_OBJ_SMALL_INT_VALUE(rhs_in);
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} else if (mp_obj_is_exact_type(rhs_in, &mp_type_int)) {
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rhs_val = ((mp_obj_int_t *)rhs_in)->val;
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} else {
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// delegate to generic function to check for extra cases
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return mp_obj_int_binary_op_extra_cases(op, lhs_in, rhs_in);
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}
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switch (op) {
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case MP_BINARY_OP_ADD:
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case MP_BINARY_OP_INPLACE_ADD:
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return mp_obj_new_int_from_ll(lhs_val + rhs_val);
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case MP_BINARY_OP_SUBTRACT:
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case MP_BINARY_OP_INPLACE_SUBTRACT:
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return mp_obj_new_int_from_ll(lhs_val - rhs_val);
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case MP_BINARY_OP_MULTIPLY:
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case MP_BINARY_OP_INPLACE_MULTIPLY:
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return mp_obj_new_int_from_ll(lhs_val * rhs_val);
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case MP_BINARY_OP_FLOOR_DIVIDE:
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case MP_BINARY_OP_INPLACE_FLOOR_DIVIDE:
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if (rhs_val == 0) {
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goto zero_division;
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}
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return mp_obj_new_int_from_ll(lhs_val / rhs_val);
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case MP_BINARY_OP_MODULO:
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case MP_BINARY_OP_INPLACE_MODULO:
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if (rhs_val == 0) {
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goto zero_division;
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}
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return mp_obj_new_int_from_ll(lhs_val % rhs_val);
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case MP_BINARY_OP_AND:
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case MP_BINARY_OP_INPLACE_AND:
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return mp_obj_new_int_from_ll(lhs_val & rhs_val);
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case MP_BINARY_OP_OR:
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case MP_BINARY_OP_INPLACE_OR:
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return mp_obj_new_int_from_ll(lhs_val | rhs_val);
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case MP_BINARY_OP_XOR:
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case MP_BINARY_OP_INPLACE_XOR:
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return mp_obj_new_int_from_ll(lhs_val ^ rhs_val);
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case MP_BINARY_OP_LSHIFT:
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case MP_BINARY_OP_INPLACE_LSHIFT:
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return mp_obj_new_int_from_ll(lhs_val << (int)rhs_val);
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case MP_BINARY_OP_RSHIFT:
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case MP_BINARY_OP_INPLACE_RSHIFT:
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return mp_obj_new_int_from_ll(lhs_val >> (int)rhs_val);
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case MP_BINARY_OP_POWER:
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case MP_BINARY_OP_INPLACE_POWER: {
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if (rhs_val < 0) {
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#if MICROPY_PY_BUILTINS_FLOAT
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return mp_obj_float_binary_op(op, lhs_val, rhs_in);
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#else
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mp_raise_ValueError(MP_ERROR_TEXT("negative power with no float support"));
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#endif
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}
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long long ans = 1;
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while (rhs_val > 0) {
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if (rhs_val & 1) {
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ans *= lhs_val;
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}
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if (rhs_val == 1) {
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break;
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}
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rhs_val /= 2;
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lhs_val *= lhs_val;
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}
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return mp_obj_new_int_from_ll(ans);
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}
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case MP_BINARY_OP_LESS:
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return mp_obj_new_bool(lhs_val < rhs_val);
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case MP_BINARY_OP_MORE:
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return mp_obj_new_bool(lhs_val > rhs_val);
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case MP_BINARY_OP_LESS_EQUAL:
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return mp_obj_new_bool(lhs_val <= rhs_val);
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case MP_BINARY_OP_MORE_EQUAL:
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return mp_obj_new_bool(lhs_val >= rhs_val);
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case MP_BINARY_OP_EQUAL:
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return mp_obj_new_bool(lhs_val == rhs_val);
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default:
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return MP_OBJ_NULL; // op not supported
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}
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zero_division:
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mp_raise_msg(&mp_type_ZeroDivisionError, MP_ERROR_TEXT("divide by zero"));
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}
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mp_obj_t mp_obj_new_int(mp_int_t value) {
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if (MP_SMALL_INT_FITS(value)) {
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return MP_OBJ_NEW_SMALL_INT(value);
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}
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return mp_obj_new_int_from_ll(value);
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}
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mp_obj_t mp_obj_new_int_from_uint(mp_uint_t value) {
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// SMALL_INT accepts only signed numbers, so make sure the input
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// value fits completely in the small-int positive range.
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if ((value & ~MP_SMALL_INT_POSITIVE_MASK) == 0) {
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return MP_OBJ_NEW_SMALL_INT(value);
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}
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return mp_obj_new_int_from_ll(value);
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}
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mp_obj_t mp_obj_new_int_from_ll(long long val) {
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mp_obj_int_t *o = mp_obj_malloc(mp_obj_int_t, &mp_type_int);
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o->val = val;
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return o;
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}
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mp_obj_t mp_obj_new_int_from_ull(unsigned long long val) {
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// TODO raise an exception if the unsigned long long won't fit
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if (val >> (sizeof(unsigned long long) * 8 - 1) != 0) {
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mp_raise_msg(&mp_type_OverflowError, MP_ERROR_TEXT("ulonglong too large"));
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}
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mp_obj_int_t *o = mp_obj_malloc(mp_obj_int_t, &mp_type_int);
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o->val = val;
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return o;
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}
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mp_obj_t mp_obj_new_int_from_str_len(const char **str, size_t len, bool neg, unsigned int base) {
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// TODO this does not honor the given length of the string, but it all cases it should anyway be null terminated
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// TODO check overflow
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mp_obj_int_t *o = mp_obj_malloc(mp_obj_int_t, &mp_type_int);
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char *endptr;
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o->val = strtoll(*str, &endptr, base);
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*str = endptr;
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return o;
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}
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mp_int_t mp_obj_int_get_truncated(mp_const_obj_t self_in) {
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if (mp_obj_is_small_int(self_in)) {
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return MP_OBJ_SMALL_INT_VALUE(self_in);
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} else {
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const mp_obj_int_t *self = self_in;
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return self->val;
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}
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}
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mp_int_t mp_obj_int_get_checked(mp_const_obj_t self_in) {
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// TODO: Check overflow
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return mp_obj_int_get_truncated(self_in);
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}
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#if MICROPY_PY_BUILTINS_FLOAT
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mp_float_t mp_obj_int_as_float_impl(mp_obj_t self_in) {
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assert(mp_obj_is_exact_type(self_in, &mp_type_int));
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mp_obj_int_t *self = self_in;
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return self->val;
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}
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#endif
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#endif
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