mirror of
https://github.com/DarkFlippers/unleashed-firmware.git
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0154018363
* FBT: cdefines to env, libs order * API: strtod, modf, itoa, calloc * Apps: elk js * Apps: mjs * JS: scripts as assets * mjs: composite resolver * mjs: stack trace * ELK JS example removed * MJS thread, MJS lib modified to support script interruption * JS console UI * Module system, BadUSB bindings rework * JS notifications, simple dialog, BadUSB demo * Custom dialogs, dialog demo * MJS as system library, some dirty hacks to make it compile * Plugin-based js modules * js_uart(BadUART) module * js_uart: support for byte array arguments * Script icon and various fixes * File browser: multiple extensions filter, running js scripts from app loader * Running js scripts from archive browser * JS Runner as system app * Example scripts moved to /ext/apps/Scripts * JS bytecode listing generation * MJS builtin printf cleanup * JS examples cleanup * mbedtls version fix * Unused lib cleanup * Making PVS happy & TODOs cleanup * TODOs cleanup #2 * MJS: initial typed arrays support * JS: fix mem leak in uart destructor Co-authored-by: SG <who.just.the.doctor@gmail.com> Co-authored-by: Aleksandr Kutuzov <alleteam@gmail.com>
77 lines
1.9 KiB
C
77 lines
1.9 KiB
C
/*
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* Copyright (c) 2014-2018 Cesanta Software Limited
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* All rights reserved
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*
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* Licensed under the Apache License, Version 2.0 (the ""License"");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an ""AS IS"" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "cs_varint.h"
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size_t cs_varint_llen(uint64_t num) {
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size_t llen = 0;
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do {
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llen++;
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} while (num >>= 7);
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return llen;
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}
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size_t cs_varint_encode(uint64_t num, uint8_t *buf, size_t buf_size) {
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size_t llen = 0;
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do {
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uint8_t byte = num & 0x7f;
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num >>= 7;
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if (num != 0) byte |= 0x80;
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if (llen < buf_size) *buf++ = byte;
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llen++;
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} while (num != 0);
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return llen;
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}
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bool cs_varint_decode(const uint8_t *buf, size_t buf_size, uint64_t *num,
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size_t *llen) {
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size_t i = 0, shift = 0;
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uint64_t n = 0;
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do {
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if (i == buf_size || i == (8 * sizeof(*num) / 7 + 1)) return false;
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/*
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* Each byte of varint contains 7 bits, in little endian order.
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* MSB is a continuation bit: it tells whether next byte is used.
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*/
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n |= ((uint64_t)(buf[i] & 0x7f)) << shift;
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/*
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* First we increment i, then check whether it is within boundary and
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* whether decoded byte had continuation bit set.
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*/
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i++;
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shift += 7;
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} while (shift < sizeof(uint64_t) * 8 && (buf[i - 1] & 0x80));
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*num = n;
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*llen = i;
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return true;
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}
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uint64_t cs_varint_decode_unsafe(const uint8_t *buf, int *llen) {
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uint64_t v;
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size_t l;
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cs_varint_decode(buf, ~0, &v, &l);
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*llen = l;
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return v;
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}
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