mirror of
https://github.com/DarkFlippers/unleashed-firmware
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60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
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/*
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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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#ifndef CS_COMMON_CS_VARINT_H_
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#define CS_COMMON_CS_VARINT_H_
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#if defined(_WIN32) && _MSC_VER < 1700
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typedef unsigned char uint8_t;
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typedef unsigned __int64 uint64_t;
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#else
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdlib.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Returns number of bytes required to encode `num`. */
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size_t cs_varint_llen(uint64_t num);
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/*
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* Encodes `num` into `buf`.
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* Returns number of bytes required to encode `num`.
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* Note: return value may be greater than `buf_size` but the function will only
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* write `buf_size` bytes.
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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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/*
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* Decodes varint stored in `buf`.
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* Stores the number of bytes consumed into `llen`.
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* If there aren't enough bytes in `buf` to decode a number, returns false.
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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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uint64_t cs_varint_decode_unsafe(const uint8_t *buf, int *llen);
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#ifdef __cplusplus
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}
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#endif
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#endif /* CS_COMMON_CS_VARINT_H_ */
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