src/main/common/streambuf.h - master - Sangak/inav

src/main/common/streambuf.h
63 строки2 KB
Mr D - RC
Allow signed for SNR
03 ноя 2024, 19:22
03 ноя 2024, 19:22b5b9e58
/*
 * This file is part of Cleanflight.
 *
 * Cleanflight 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.
 *
 * Cleanflight 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 Cleanflight.  If not, see <http://www.gnu.org/licenses/>.
 */

#pragma once

#include <stdbool.h>
#include <stdint.h>

// simple buffer-based serializer/deserializer without implicit size check
// little-endian encoding implemneted now

typedef struct sbuf_s {
    uint8_t *ptr;          // data pointer must be first (sbuff_t* is equivalent to uint8_t **)
    uint8_t *end;
} sbuf_t;

sbuf_t *sbufInit(sbuf_t *sbuf, uint8_t *ptr, uint8_t *end);

void sbufWriteU8(sbuf_t *dst, uint8_t val);
void sbufWriteU16(sbuf_t *dst, uint16_t val);
void sbufWriteU32(sbuf_t *dst, uint32_t val);
void sbufFill(sbuf_t *dst, uint8_t data, int len);
void sbufWriteData(sbuf_t *dst, const void *data, int len);
bool sbufWriteDataSafe(sbuf_t *dst, const void *data, int len);
void sbufWriteString(sbuf_t *dst, const char *string);
void sbufWriteStringWithZeroTerminator(sbuf_t *dst, const char *string);
void sbufWriteU16BigEndian(sbuf_t *dst, uint16_t val);
void sbufWriteU32BigEndian(sbuf_t *dst, uint32_t val);

uint8_t sbufReadU8(sbuf_t *src);
int8_t sbufReadI8(sbuf_t *src);
uint16_t sbufReadU16(sbuf_t *src);
uint32_t sbufReadU32(sbuf_t *src);
void sbufReadData(const sbuf_t *dst, void *data, int len);

bool sbufReadU8Safe(uint8_t *dst, sbuf_t *src);
bool sbufReadU16Safe(uint16_t *dst, sbuf_t *src);
bool sbufReadU32Safe(uint32_t *dst, sbuf_t *src);
bool sbufReadI8Safe(int8_t *dst, sbuf_t *src);
bool sbufReadI16Safe(int16_t *dst, sbuf_t *src);
bool sbufReadI32Safe(int32_t *dst, sbuf_t *src);
bool sbufReadDataSafe(const sbuf_t *src, void *data, int len);

int sbufBytesRemaining(const sbuf_t *buf);
uint8_t* sbufPtr(sbuf_t *buf);
const uint8_t* sbufConstPtr(const sbuf_t *buf);
void sbufAdvance(sbuf_t *buf, int size);

void sbufSwitchToReader(sbuf_t *buf, uint8_t * base);