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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef FLB_COMPRESSION_H
#define FLB_COMPRESSION_H
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_gzip.h>
#include <stdio.h>
#define FLB_COMPRESSION_ALGORITHM_NONE 0
#define FLB_COMPRESSION_ALGORITHM_GZIP 1
#define FLB_DECOMPRESSOR_STATE_FAILED -1
#define FLB_DECOMPRESSOR_STATE_EXPECTING_HEADER 0
#define FLB_DECOMPRESSOR_STATE_EXPECTING_OPTIONAL_HEADERS 1
#define FLB_DECOMPRESSOR_STATE_EXPECTING_BODY 2
#define FLB_DECOMPRESSOR_STATE_EXPECTING_FOOTER 3
#define FLB_DECOMPRESSOR_FAILURE -1
#define FLB_DECOMPRESSOR_CORRUPTED_HEADER -2
#define FLB_DECOMPRESSOR_INVALID_STATE -3
#define FLB_DECOMPRESSOR_SUCCESS 0
#define FLB_DECOMPRESSOR_INSUFFICIENT_DATA 0
#define FLB_DECOMPRESSION_BUFFER_SIZE (1024 * 1000)
struct flb_decompression_context {
size_t input_buffer_length;
size_t input_buffer_size;
uint8_t *input_buffer;
uint8_t *read_buffer;
int algorithm;
int state;
/* Compression backend specific context (opaque) */
void *inner_context;
};
uint8_t *flb_decompression_context_get_append_buffer(
struct flb_decompression_context *context);
size_t flb_decompression_context_get_available_space(
struct flb_decompression_context *context);
int flb_decompression_context_resize_buffer(
struct flb_decompression_context *context, size_t new_size);
struct flb_decompression_context *flb_decompression_context_create(
int algorithm,
size_t input_buffer_size);
void flb_decompression_context_destroy(
struct flb_decompression_context *context);
int flb_decompress(struct flb_decompression_context *context,
void *output_buffer,
size_t *output_length);
#endif
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