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 65