libsparse/backed_block.h

   1 /*
   2  * Copyright (C) 2010 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef _BACKED_BLOCK_H_
  18 #define _BACKED_BLOCK_H_
  19
  20 #include <stdint.h>
  21
  22 struct backed_block_list;
  23 struct backed_block;
  24
  25 enum backed_block_type {
  26         BACKED_BLOCK_DATA,
  27         BACKED_BLOCK_FILE,
  28         BACKED_BLOCK_FD,
  29         BACKED_BLOCK_FILL,
  30 };
  31
  32 int backed_block_add_data(struct backed_block_list *bbl, void *data,
  33                 unsigned int len, unsigned int block);
  34 int backed_block_add_fill(struct backed_block_list *bbl, unsigned int fill_val,
  35                 unsigned int len, unsigned int block);
  36 int backed_block_add_file(struct backed_block_list *bbl, const char *filename,
  37                 int64_t offset, unsigned int len, unsigned int block);
  38 int backed_block_add_fd(struct backed_block_list *bbl, int fd,
  39                 int64_t offset, unsigned int len, unsigned int block);
  40
  41 struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
  42 struct backed_block *backed_block_iter_next(struct backed_block *bb);
  43 unsigned int backed_block_len(struct backed_block *bb);
  44 unsigned int backed_block_block(struct backed_block *bb);
  45 void *backed_block_data(struct backed_block *bb);
  46 const char *backed_block_filename(struct backed_block *bb);
  47 int backed_block_fd(struct backed_block *bb);
  48 int64_t backed_block_file_offset(struct backed_block *bb);
  49 uint32_t backed_block_fill_val(struct backed_block *bb);
  50 enum backed_block_type backed_block_type(struct backed_block *bb);
  51 int backed_block_split(struct backed_block_list *bbl, struct backed_block *bb,
  52                 unsigned int max_len);
  53
  54 struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
  55 struct backed_block *backed_block_iter_next(struct backed_block *bb);
  56
  57 struct backed_block_list *backed_block_list_new(unsigned int block_size);
  58 void backed_block_list_destroy(struct backed_block_list *bbl);
  59
  60 void backed_block_list_move(struct backed_block_list *from,
  61                 struct backed_block_list *to, struct backed_block *start,
  62                 struct backed_block *end);
  63
  64 #endif