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//
// Created by barkerm on 9/09/15.
//
#ifndef HDR_ENCODING_H
#define HDR_ENCODING_H
#include <stdint.h>
#define MAX_BYTES_LEB128 9
#ifdef __cplusplus
extern "C" {
#endif
/**
* Writes a int64_t value to the given buffer in LEB128 ZigZag encoded format
*
* @param buffer the buffer to write to
* @param signed_value the value to write to the buffer
* @return the number of bytes written to the buffer
*/
int zig_zag_encode_i64(uint8_t* buffer, int64_t signed_value);
/**
* Read an LEB128 ZigZag encoded long value from the given buffer
*
* @param buffer the buffer to read from
* @param retVal out value to capture the read value
* @return the number of bytes read from the buffer
*/
int zig_zag_decode_i64(const uint8_t* buffer, int64_t* signed_value);
/**
* Gets the length in bytes of base64 data, given the input size.
*
* @param decoded_size the size of the unencoded values.
* @return the encoded size
*/
size_t hdr_base64_encoded_len(size_t decoded_size);
/**
* Encode into base64.
*
* @param input the data to encode
* @param input_len the length of the data to encode
* @param output the buffer to write the output to
* @param output_len the number of bytes to write to the output
*/
int hdr_base64_encode(
const uint8_t* input, size_t input_len, char* output, size_t output_len);
/**
* Gets the length in bytes of decoded base64 data, given the size of the base64 encoded
* data.
*
* @param encoded_size the size of the encoded value.
* @return the decoded size
*/
size_t hdr_base64_decoded_len(size_t encoded_size);
/**
* Decode from base64.
*
* @param input the base64 encoded data
* @param input_len the size in bytes of the endcoded data
* @param output the buffer to write the decoded data to
* @param output_len the number of bytes to write to the output data
*/
int hdr_base64_decode(
const char* input, size_t input_len, uint8_t* output, size_t output_len);
#ifdef __cplusplus
}
#endif
#endif //HDR_HISTOGRAM_HDR_ENCODING_H
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