mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-30 03:18:20 +00:00
95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "memzero.h"
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#include "py/obj.h"
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#include "py/objint.h"
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#include "py/objstr.h"
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#include "py/runtime.h"
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static bool mpz_as_ll_checked(const mpz_t *i, long long *value) {
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// Analogue of `mpz_as_int_checked` from mpz.c
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unsigned long long val = 0;
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mpz_dig_t *d = i->dig + i->len;
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while (d-- > i->dig) {
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if (val > (~0x8000000000000000 >> MPZ_DIG_SIZE)) {
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// will overflow
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*value = 0;
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return false;
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}
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val = (val << MPZ_DIG_SIZE) | *d;
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}
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if (i->neg != 0) {
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val = -val;
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}
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*value = val;
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return true;
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}
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bool trezor_obj_get_ll_checked(mp_obj_t obj, long long *value) {
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if (mp_obj_is_small_int(obj)) {
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// Value is fitting in a small int range. Return it directly.
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*value = MP_OBJ_SMALL_INT_VALUE(obj);
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return true;
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} else if (mp_obj_is_type(obj, &mp_type_int)) {
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// Value is not fitting into small int range, but is an integer.
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mp_obj_int_t *self = MP_OBJ_TO_PTR(obj);
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// Try to get the long long value out of the MPZ struct.
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return mpz_as_ll_checked(&self->mpz, value);
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} else {
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// Value is not integer.
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*value = 0;
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return false;
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}
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}
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mp_obj_t trezor_obj_call_protected(void (*func)(void *), void *arg) {
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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(*func)(arg);
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nlr_pop();
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return NULL;
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} else {
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return MP_OBJ_FROM_PTR(nlr.ret_val);
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}
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}
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mp_obj_t trezor_obj_str_from_rom_text(const char *str) {
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// taken from mp_obj_new_exception_msg
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mp_obj_str_t *o_str = m_new_obj_maybe(mp_obj_str_t);
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if (o_str == NULL) return NULL;
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o_str->base.type = &mp_type_str;
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o_str->len = strlen(str);
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o_str->data = (const byte *)str;
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#if MICROPY_ROM_TEXT_COMPRESSION
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o_str->hash = 0; // will be computed only if string object is accessed
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#else
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o_str->hash = qstr_compute_hash(o_str->data, o_str->len);
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#endif
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return MP_OBJ_FROM_PTR(o_str);
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}
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