libyara-dev 3.4.0+dfsg-2build1 / usr / include / yara / arena.h

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/*
Copyright (c) 2013. The YARA Authors. All Rights Reserved.

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 YR_ARENA_H
#define YR_ARENA_H

#include <stdint.h>
#include <stddef.h>

#include <yara/stream.h>

#define ARENA_FLAGS_FIXED_SIZE   1
#define ARENA_FLAGS_COALESCED    2
#define ARENA_FILE_VERSION       8

#define EOL ((size_t) -1)


typedef struct _YR_RELOC
{
  int32_t offset;
  struct _YR_RELOC* next;

} YR_RELOC;


typedef struct _YR_ARENA_PAGE
{

  uint8_t* new_address;
  uint8_t* address;

  size_t size;
  size_t used;

  YR_RELOC* reloc_list_head;
  YR_RELOC* reloc_list_tail;

  struct _YR_ARENA_PAGE* next;
  struct _YR_ARENA_PAGE* prev;

} YR_ARENA_PAGE;


typedef struct _YR_ARENA
{
  int flags;

  YR_ARENA_PAGE* page_list_head;
  YR_ARENA_PAGE* current_page;

} YR_ARENA;


int yr_arena_create(
    size_t initial_size,
    int flags,
    YR_ARENA** arena);


void yr_arena_destroy(
    YR_ARENA* arena);


void* yr_arena_base_address(
    YR_ARENA* arena);


void* yr_arena_next_address(
    YR_ARENA* arena,
    void* address,
    int offset);


int yr_arena_coalesce(
    YR_ARENA* arena);


int yr_arena_reserve_memory(
    YR_ARENA* arena,
    size_t size);


int yr_arena_allocate_memory(
    YR_ARENA* arena,
    size_t size,
    void** allocated_memory);


int yr_arena_allocate_struct(
    YR_ARENA* arena,
    size_t size,
    void** allocated_memory,
    ...);


int yr_arena_make_relocatable(
    YR_ARENA* arena,
    void* base,
    ...);


int yr_arena_write_data(
    YR_ARENA* arena,
    void* data,
    size_t size,
    void** written_data);


int yr_arena_write_string(
    YR_ARENA* arena,
    const char* string,
    char** written_string);


int yr_arena_append(
    YR_ARENA* target_arena,
    YR_ARENA* source_arena);


int yr_arena_load_stream(
    YR_STREAM* stream,
    YR_ARENA** arena);


int yr_arena_save_stream(
  YR_ARENA* arena,
  YR_STREAM* stream);


int yr_arena_duplicate(
    YR_ARENA* arena,
    YR_ARENA** duplicated);


void yr_arena_print(
    YR_ARENA* arena);

#endif

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