circuitpython/py/objint_longlong.c

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

305 lines
9.7 KiB
C
Raw Normal View History

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
* Copyright (c) 2014 Paul Sokolovsky
*
* 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 <stdlib.h>
#include <string.h>
#include "py/smallint.h"
#include "py/objint.h"
#include "py/runtime.h"
#if MICROPY_PY_BUILTINS_FLOAT
#include <math.h>
#endif
#if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_LONGLONG
#if MICROPY_PY_SYS_MAXSIZE
// Export value for sys.maxsize
const mp_obj_int_t mp_sys_maxsize_obj = {{&mp_type_int}, MP_SSIZE_MAX};
#endif
mp_obj_t mp_obj_int_bit_length_impl(mp_obj_t self_in) {
assert(mp_obj_is_type(self_in, &mp_type_int));
mp_obj_int_t *self = self_in;
long long val = self->val;
return MP_OBJ_NEW_SMALL_INT(
(val == 0) ? 0 :
(val == MP_SMALL_INT_MIN) ? 8 * sizeof(long long) :
(val < 0) ? 8 * sizeof(long long) - __builtin_clzll(-val) :
2021-03-15 09:57:36 -04:00
8 * sizeof(long long) - __builtin_clzll(val));
}
mp_obj_t mp_obj_int_from_bytes_impl(bool big_endian, size_t len, const byte *buf) {
int delta = 1;
if (!big_endian) {
buf += len - 1;
delta = -1;
}
mp_longint_impl_t value = 0;
for (; len--; buf += delta) {
value = (value << 8) | *buf;
}
return mp_obj_new_int_from_ll(value);
}
void mp_obj_int_to_bytes_impl(mp_obj_t self_in, bool big_endian, size_t len, byte *buf) {
py/obj: Add static safety checks to mp_obj_is_type(). Commit d96cfd13e3a464862c introduced a regression by breaking existing users of mp_obj_is_type(.., &mp_obj_bool). This function (and associated helpers like mp_obj_is_int()) have some specific nuances, and mistakes like this one can happen again. This commit adds mp_obj_is_exact_type() which behaves like the the old mp_obj_is_type(). The new mp_obj_is_type() has the same prototype but it attempts to statically assert that it's not called with types which should be checked using mp_obj_is_type(). If called with any of these types: int, str, bool, NoneType - it will cause a compilation error. Additional checked types (e.g function types) can be added in the future. Existing users of mp_obj_is_type() with the now "invalid" types, were translated to use mp_obj_is_exact_type(). The use of MP_STATIC_ASSERT() is not bulletproof - usually GCC (and other compilers) can't statically check conditions that are only known during link-time (like variables' addresses comparison). However, in this case, GCC is able to statically detect these conditions, probably because it's the exact same object - `&mp_type_int == &mp_type_int` is detected. Misuses of this function with runtime-chosen types (e.g: `mp_obj_type_t *x = ...; mp_obj_is_type(..., x);` won't be detected. MSC is unable to detect this, so we use MP_STATIC_ASSERT_NOT_MSC(). Compiling with this commit and without the fix for d96cfd13e3a464862c shows that it detects the problem. Signed-off-by: Yonatan Goldschmidt <yon.goldschmidt@gmail.com>
2020-01-22 07:34:19 -05:00
assert(mp_obj_is_exact_type(self_in, &mp_type_int));
mp_obj_int_t *self = self_in;
long long val = self->val;
if (big_endian) {
byte *b = buf + len;
while (b > buf) {
*--b = val;
val >>= 8;
}
} else {
for (; len > 0; --len) {
*buf++ = val;
val >>= 8;
}
}
}
int mp_obj_int_sign(mp_obj_t self_in) {
mp_longint_impl_t val;
if (mp_obj_is_small_int(self_in)) {
val = MP_OBJ_SMALL_INT_VALUE(self_in);
} else {
mp_obj_int_t *self = self_in;
val = self->val;
}
if (val < 0) {
return -1;
} else if (val > 0) {
return 1;
} else {
return 0;
}
}
mp_obj_t mp_obj_int_unary_op(mp_unary_op_t op, mp_obj_t o_in) {
2014-01-27 02:05:50 -05:00
mp_obj_int_t *o = o_in;
switch (op) {
2021-03-15 09:57:36 -04:00
case MP_UNARY_OP_BOOL:
return mp_obj_new_bool(o->val != 0);
// truncate value to fit in mp_int_t, which gives the same hash as
// small int if the value fits without truncation
2021-03-15 09:57:36 -04:00
case MP_UNARY_OP_HASH:
return MP_OBJ_NEW_SMALL_INT((mp_int_t)o->val);
case MP_UNARY_OP_POSITIVE:
return o_in;
case MP_UNARY_OP_NEGATIVE:
return mp_obj_new_int_from_ll(-o->val);
case MP_UNARY_OP_INVERT:
return mp_obj_new_int_from_ll(~o->val);
case MP_UNARY_OP_ABS: {
mp_obj_int_t *self = MP_OBJ_TO_PTR(o_in);
if (self->val >= 0) {
return o_in;
}
self = mp_obj_new_int_from_ll(self->val);
// TODO could overflow long long
self->val = -self->val;
return MP_OBJ_FROM_PTR(self);
}
2021-03-15 09:57:36 -04:00
default:
return MP_OBJ_NULL; // op not supported
2014-01-27 02:05:50 -05:00
}
}
mp_obj_t mp_obj_int_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
long long lhs_val;
long long rhs_val;
if (mp_obj_is_small_int(lhs_in)) {
lhs_val = MP_OBJ_SMALL_INT_VALUE(lhs_in);
} else {
py/obj: Add static safety checks to mp_obj_is_type(). Commit d96cfd13e3a464862c introduced a regression by breaking existing users of mp_obj_is_type(.., &mp_obj_bool). This function (and associated helpers like mp_obj_is_int()) have some specific nuances, and mistakes like this one can happen again. This commit adds mp_obj_is_exact_type() which behaves like the the old mp_obj_is_type(). The new mp_obj_is_type() has the same prototype but it attempts to statically assert that it's not called with types which should be checked using mp_obj_is_type(). If called with any of these types: int, str, bool, NoneType - it will cause a compilation error. Additional checked types (e.g function types) can be added in the future. Existing users of mp_obj_is_type() with the now "invalid" types, were translated to use mp_obj_is_exact_type(). The use of MP_STATIC_ASSERT() is not bulletproof - usually GCC (and other compilers) can't statically check conditions that are only known during link-time (like variables' addresses comparison). However, in this case, GCC is able to statically detect these conditions, probably because it's the exact same object - `&mp_type_int == &mp_type_int` is detected. Misuses of this function with runtime-chosen types (e.g: `mp_obj_type_t *x = ...; mp_obj_is_type(..., x);` won't be detected. MSC is unable to detect this, so we use MP_STATIC_ASSERT_NOT_MSC(). Compiling with this commit and without the fix for d96cfd13e3a464862c shows that it detects the problem. Signed-off-by: Yonatan Goldschmidt <yon.goldschmidt@gmail.com>
2020-01-22 07:34:19 -05:00
assert(mp_obj_is_exact_type(lhs_in, &mp_type_int));
2021-03-15 09:57:36 -04:00
lhs_val = ((mp_obj_int_t *)lhs_in)->val;
}
if (mp_obj_is_small_int(rhs_in)) {
rhs_val = MP_OBJ_SMALL_INT_VALUE(rhs_in);
py/obj: Add static safety checks to mp_obj_is_type(). Commit d96cfd13e3a464862c introduced a regression by breaking existing users of mp_obj_is_type(.., &mp_obj_bool). This function (and associated helpers like mp_obj_is_int()) have some specific nuances, and mistakes like this one can happen again. This commit adds mp_obj_is_exact_type() which behaves like the the old mp_obj_is_type(). The new mp_obj_is_type() has the same prototype but it attempts to statically assert that it's not called with types which should be checked using mp_obj_is_type(). If called with any of these types: int, str, bool, NoneType - it will cause a compilation error. Additional checked types (e.g function types) can be added in the future. Existing users of mp_obj_is_type() with the now "invalid" types, were translated to use mp_obj_is_exact_type(). The use of MP_STATIC_ASSERT() is not bulletproof - usually GCC (and other compilers) can't statically check conditions that are only known during link-time (like variables' addresses comparison). However, in this case, GCC is able to statically detect these conditions, probably because it's the exact same object - `&mp_type_int == &mp_type_int` is detected. Misuses of this function with runtime-chosen types (e.g: `mp_obj_type_t *x = ...; mp_obj_is_type(..., x);` won't be detected. MSC is unable to detect this, so we use MP_STATIC_ASSERT_NOT_MSC(). Compiling with this commit and without the fix for d96cfd13e3a464862c shows that it detects the problem. Signed-off-by: Yonatan Goldschmidt <yon.goldschmidt@gmail.com>
2020-01-22 07:34:19 -05:00
} else if (mp_obj_is_exact_type(rhs_in, &mp_type_int)) {
2021-03-15 09:57:36 -04:00
rhs_val = ((mp_obj_int_t *)rhs_in)->val;
} else {
// delegate to generic function to check for extra cases
return mp_obj_int_binary_op_extra_cases(op, lhs_in, rhs_in);
}
switch (op) {
case MP_BINARY_OP_ADD:
case MP_BINARY_OP_INPLACE_ADD:
return mp_obj_new_int_from_ll(lhs_val + rhs_val);
case MP_BINARY_OP_SUBTRACT:
case MP_BINARY_OP_INPLACE_SUBTRACT:
return mp_obj_new_int_from_ll(lhs_val - rhs_val);
case MP_BINARY_OP_MULTIPLY:
case MP_BINARY_OP_INPLACE_MULTIPLY:
return mp_obj_new_int_from_ll(lhs_val * rhs_val);
case MP_BINARY_OP_FLOOR_DIVIDE:
case MP_BINARY_OP_INPLACE_FLOOR_DIVIDE:
if (rhs_val == 0) {
goto zero_division;
}
return mp_obj_new_int_from_ll(lhs_val / rhs_val);
case MP_BINARY_OP_MODULO:
case MP_BINARY_OP_INPLACE_MODULO:
if (rhs_val == 0) {
goto zero_division;
}
return mp_obj_new_int_from_ll(lhs_val % rhs_val);
case MP_BINARY_OP_AND:
case MP_BINARY_OP_INPLACE_AND:
return mp_obj_new_int_from_ll(lhs_val & rhs_val);
case MP_BINARY_OP_OR:
case MP_BINARY_OP_INPLACE_OR:
return mp_obj_new_int_from_ll(lhs_val | rhs_val);
case MP_BINARY_OP_XOR:
case MP_BINARY_OP_INPLACE_XOR:
return mp_obj_new_int_from_ll(lhs_val ^ rhs_val);
2014-01-27 02:05:50 -05:00
case MP_BINARY_OP_LSHIFT:
case MP_BINARY_OP_INPLACE_LSHIFT:
return mp_obj_new_int_from_ll(lhs_val << (int)rhs_val);
case MP_BINARY_OP_RSHIFT:
case MP_BINARY_OP_INPLACE_RSHIFT:
return mp_obj_new_int_from_ll(lhs_val >> (int)rhs_val);
2014-01-27 02:05:50 -05:00
case MP_BINARY_OP_POWER:
case MP_BINARY_OP_INPLACE_POWER: {
if (rhs_val < 0) {
#if MICROPY_PY_BUILTINS_FLOAT
return mp_obj_float_binary_op(op, lhs_val, rhs_in);
#else
mp_raise_ValueError(MP_ERROR_TEXT("negative power with no float support"));
#endif
}
long long ans = 1;
while (rhs_val > 0) {
if (rhs_val & 1) {
ans *= lhs_val;
}
if (rhs_val == 1) {
break;
}
rhs_val /= 2;
lhs_val *= lhs_val;
}
return mp_obj_new_int_from_ll(ans);
}
case MP_BINARY_OP_LESS:
return mp_obj_new_bool(lhs_val < rhs_val);
case MP_BINARY_OP_MORE:
return mp_obj_new_bool(lhs_val > rhs_val);
case MP_BINARY_OP_LESS_EQUAL:
return mp_obj_new_bool(lhs_val <= rhs_val);
case MP_BINARY_OP_MORE_EQUAL:
return mp_obj_new_bool(lhs_val >= rhs_val);
case MP_BINARY_OP_EQUAL:
return mp_obj_new_bool(lhs_val == rhs_val);
default:
return MP_OBJ_NULL; // op not supported
}
zero_division:
mp_raise_ZeroDivisionError();
}
mp_obj_t mp_obj_new_int(mp_int_t value) {
if (MP_SMALL_INT_FITS(value)) {
return MP_OBJ_NEW_SMALL_INT(value);
}
return mp_obj_new_int_from_ll(value);
}
mp_obj_t mp_obj_new_int_from_uint(mp_uint_t value) {
// SMALL_INT accepts only signed numbers, so make sure the input
// value fits completely in the small-int positive range.
if ((value & ~MP_SMALL_INT_POSITIVE_MASK) == 0) {
return MP_OBJ_NEW_SMALL_INT(value);
}
return mp_obj_new_int_from_ll(value);
}
mp_obj_t mp_obj_new_int_from_ll(long long val) {
mp_obj_int_t *o = mp_obj_malloc(mp_obj_int_t, &mp_type_int);
o->val = val;
return o;
}
mp_obj_t mp_obj_new_int_from_ull(unsigned long long val) {
// TODO raise an exception if the unsigned long long won't fit
if (val >> (sizeof(unsigned long long) * 8 - 1) != 0) {
mp_raise_msg(&mp_type_OverflowError, MP_ERROR_TEXT("ulonglong too large"));
}
mp_obj_int_t *o = mp_obj_malloc(mp_obj_int_t, &mp_type_int);
o->val = val;
return o;
}
mp_obj_t mp_obj_new_int_from_str_len(const char **str, size_t len, bool neg, unsigned int base) {
// TODO this does not honor the given length of the string, but it all cases it should anyway be null terminated
// TODO check overflow
mp_obj_int_t *o = mp_obj_malloc(mp_obj_int_t, &mp_type_int);
char *endptr;
o->val = strtoll(*str, &endptr, base);
*str = endptr;
return o;
}
mp_int_t mp_obj_int_get_truncated(mp_const_obj_t self_in) {
if (mp_obj_is_small_int(self_in)) {
return MP_OBJ_SMALL_INT_VALUE(self_in);
} else {
const mp_obj_int_t *self = self_in;
return self->val;
}
}
mp_int_t mp_obj_int_get_checked(mp_const_obj_t self_in) {
// TODO: Check overflow
return mp_obj_int_get_truncated(self_in);
}
#if MICROPY_PY_BUILTINS_FLOAT
mp_float_t mp_obj_int_as_float_impl(mp_obj_t self_in) {
py/obj: Add static safety checks to mp_obj_is_type(). Commit d96cfd13e3a464862c introduced a regression by breaking existing users of mp_obj_is_type(.., &mp_obj_bool). This function (and associated helpers like mp_obj_is_int()) have some specific nuances, and mistakes like this one can happen again. This commit adds mp_obj_is_exact_type() which behaves like the the old mp_obj_is_type(). The new mp_obj_is_type() has the same prototype but it attempts to statically assert that it's not called with types which should be checked using mp_obj_is_type(). If called with any of these types: int, str, bool, NoneType - it will cause a compilation error. Additional checked types (e.g function types) can be added in the future. Existing users of mp_obj_is_type() with the now "invalid" types, were translated to use mp_obj_is_exact_type(). The use of MP_STATIC_ASSERT() is not bulletproof - usually GCC (and other compilers) can't statically check conditions that are only known during link-time (like variables' addresses comparison). However, in this case, GCC is able to statically detect these conditions, probably because it's the exact same object - `&mp_type_int == &mp_type_int` is detected. Misuses of this function with runtime-chosen types (e.g: `mp_obj_type_t *x = ...; mp_obj_is_type(..., x);` won't be detected. MSC is unable to detect this, so we use MP_STATIC_ASSERT_NOT_MSC(). Compiling with this commit and without the fix for d96cfd13e3a464862c shows that it detects the problem. Signed-off-by: Yonatan Goldschmidt <yon.goldschmidt@gmail.com>
2020-01-22 07:34:19 -05:00
assert(mp_obj_is_exact_type(self_in, &mp_type_int));
mp_obj_int_t *self = self_in;
return self->val;
}
#endif
#endif