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, uint64_t len,
33                           unsigned int block);
34 int backed_block_add_fill(struct backed_block_list* bbl, unsigned int fill_val, uint64_t len,
35                           unsigned int block);
36 int backed_block_add_file(struct backed_block_list* bbl, const char* filename, int64_t offset,
37                           uint64_t len, unsigned int block);
38 int backed_block_add_fd(struct backed_block_list* bbl, int fd, int64_t offset, uint64_t len,
39                         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 uint64_t 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, unsigned int max_len);
52 
53 struct backed_block* backed_block_iter_new(struct backed_block_list* bbl);
54 struct backed_block* backed_block_iter_next(struct backed_block* bb);
55 
56 struct backed_block_list* backed_block_list_new(unsigned int block_size);
57 void backed_block_list_destroy(struct backed_block_list* bbl);
58 
59 void backed_block_list_move(struct backed_block_list* from, struct backed_block_list* to,
60                             struct backed_block* start, struct backed_block* end);
61 
62 #endif
63