bdc6d39ed6
Add sparse_file_repsarse, which splits chunks in an existing sparse file such that the maximum size of a chunk, plus a header and footer, is smaller than the given size. This will allow multiple smaller sparse files to result in the same data as a large sparse file. Change-Id: I177abdb958a23d5afd394ff265c5b0c6a3ff22fa
64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _BACKED_BLOCK_H_
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#define _BACKED_BLOCK_H_
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#include <stdint.h>
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struct backed_block_list;
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struct backed_block;
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enum backed_block_type {
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BACKED_BLOCK_DATA,
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BACKED_BLOCK_FILE,
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BACKED_BLOCK_FD,
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BACKED_BLOCK_FILL,
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};
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int backed_block_add_data(struct backed_block_list *bbl, void *data,
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unsigned int len, unsigned int block);
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int backed_block_add_fill(struct backed_block_list *bbl, unsigned int fill_val,
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unsigned int len, unsigned int block);
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int backed_block_add_file(struct backed_block_list *bbl, const char *filename,
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int64_t offset, unsigned int len, unsigned int block);
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int backed_block_add_fd(struct backed_block_list *bbl, int fd,
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int64_t offset, unsigned int len, unsigned int block);
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struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
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struct backed_block *backed_block_iter_next(struct backed_block *bb);
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unsigned int backed_block_len(struct backed_block *bb);
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unsigned int backed_block_block(struct backed_block *bb);
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void *backed_block_data(struct backed_block *bb);
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const char *backed_block_filename(struct backed_block *bb);
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int backed_block_fd(struct backed_block *bb);
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int64_t backed_block_file_offset(struct backed_block *bb);
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uint32_t backed_block_fill_val(struct backed_block *bb);
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enum backed_block_type backed_block_type(struct backed_block *bb);
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int backed_block_split(struct backed_block_list *bbl, struct backed_block *bb,
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unsigned int max_len);
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struct backed_block *backed_block_iter_new(struct backed_block_list *bbl);
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struct backed_block *backed_block_iter_next(struct backed_block *bb);
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struct backed_block_list *backed_block_list_new(unsigned int block_size);
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void backed_block_list_destroy(struct backed_block_list *bbl);
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void backed_block_list_move(struct backed_block_list *from,
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struct backed_block_list *to, struct backed_block *start,
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struct backed_block *end);
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#endif
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