mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-04 21:48:17 +00:00
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (c) SatoshiLabs
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "memzero.h"
|
|
#include "py/obj.h"
|
|
#include "py/objint.h"
|
|
#include "py/objstr.h"
|
|
#include "py/runtime.h"
|
|
|
|
static bool mpz_as_ll_checked(const mpz_t *i, long long *value) {
|
|
// Analogue of `mpz_as_int_checked` from mpz.c
|
|
|
|
unsigned long long val = 0;
|
|
mpz_dig_t *d = i->dig + i->len;
|
|
|
|
while (d-- > i->dig) {
|
|
if (val > (~0x8000000000000000 >> MPZ_DIG_SIZE)) {
|
|
// will overflow
|
|
*value = 0;
|
|
return false;
|
|
}
|
|
val = (val << MPZ_DIG_SIZE) | *d;
|
|
}
|
|
|
|
if (i->neg != 0) {
|
|
val = -val;
|
|
}
|
|
|
|
*value = val;
|
|
return true;
|
|
}
|
|
|
|
bool trezor_obj_get_ll_checked(mp_obj_t obj, long long *value) {
|
|
if (mp_obj_is_small_int(obj)) {
|
|
// Value is fitting in a small int range. Return it directly.
|
|
*value = MP_OBJ_SMALL_INT_VALUE(obj);
|
|
return true;
|
|
|
|
} else if (mp_obj_is_type(obj, &mp_type_int)) {
|
|
// Value is not fitting into small int range, but is an integer.
|
|
mp_obj_int_t *self = MP_OBJ_TO_PTR(obj);
|
|
// Try to get the long long value out of the MPZ struct.
|
|
return mpz_as_ll_checked(&self->mpz, value);
|
|
} else {
|
|
// Value is not integer.
|
|
*value = 0;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
mp_obj_t trezor_obj_call_protected(void (*func)(void *), void *arg) {
|
|
nlr_buf_t nlr;
|
|
if (nlr_push(&nlr) == 0) {
|
|
(*func)(arg);
|
|
nlr_pop();
|
|
return NULL;
|
|
} else {
|
|
return MP_OBJ_FROM_PTR(nlr.ret_val);
|
|
}
|
|
}
|
|
|
|
mp_obj_t trezor_obj_str_from_rom_text(const char *str) {
|
|
// taken from mp_obj_new_exception_msg
|
|
mp_obj_str_t *o_str = m_new_obj_maybe(mp_obj_str_t);
|
|
if (o_str == NULL) return NULL;
|
|
|
|
o_str->base.type = &mp_type_str;
|
|
o_str->len = strlen(str);
|
|
o_str->data = (const byte *)str;
|
|
#if MICROPY_ROM_TEXT_COMPRESSION
|
|
o_str->hash = 0; // will be computed only if string object is accessed
|
|
#else
|
|
o_str->hash = qstr_compute_hash(o_str->data, o_str->len);
|
|
#endif
|
|
return MP_OBJ_FROM_PTR(o_str);
|
|
}
|