mirror of
https://git.proxmox.com/git/libgit2
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89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/*
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* Copyright (C) the libgit2 contributors. All rights reserved.
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*
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* This file is part of libgit2, distributed under the GNU GPL v2 with
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* a Linking Exception. For full terms see the included COPYING file.
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*/
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#ifndef INCLUDE_filebuf_h__
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#define INCLUDE_filebuf_h__
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#include "fileops.h"
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#include "hash.h"
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#include <zlib.h>
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#ifdef GIT_THREADS
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# define GIT_FILEBUF_THREADS
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#endif
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#define GIT_FILEBUF_HASH_CONTENTS (1 << 0)
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#define GIT_FILEBUF_APPEND (1 << 2)
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#define GIT_FILEBUF_FORCE (1 << 3)
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#define GIT_FILEBUF_TEMPORARY (1 << 4)
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#define GIT_FILEBUF_DO_NOT_BUFFER (1 << 5)
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#define GIT_FILEBUF_DEFLATE_SHIFT (6)
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#define GIT_FILELOCK_EXTENSION ".lock\0"
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#define GIT_FILELOCK_EXTLENGTH 6
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struct git_filebuf {
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char *path_original;
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char *path_lock;
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int (*write)(struct git_filebuf *file, void *source, size_t len);
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bool compute_digest;
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git_hash_ctx digest;
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unsigned char *buffer;
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unsigned char *z_buf;
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z_stream zs;
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int flush_mode;
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size_t buf_size, buf_pos;
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git_file fd;
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bool fd_is_open;
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bool do_not_buffer;
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int last_error;
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};
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typedef struct git_filebuf git_filebuf;
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#define GIT_FILEBUF_INIT {0}
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/*
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* The git_filebuf object lifecycle is:
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* - Allocate git_filebuf, preferably using GIT_FILEBUF_INIT.
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*
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* - Call git_filebuf_open() to initialize the filebuf for use.
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*
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* - Make as many calls to git_filebuf_write(), git_filebuf_printf(),
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* git_filebuf_reserve() as you like. The error codes for these
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* functions don't need to be checked. They are stored internally
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* by the file buffer.
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*
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* - While you are writing, you may call git_filebuf_hash() to get
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* the hash of all you have written so far. This function will
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* fail if any of the previous writes to the buffer failed.
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*
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* - To close the git_filebuf, you may call git_filebuf_commit() or
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* git_filebuf_commit_at() to save the file, or
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* git_filebuf_cleanup() to abandon the file. All of these will
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* free the git_filebuf object. Likewise, all of these will fail
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* if any of the previous writes to the buffer failed, and set
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* an error code accordingly.
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*/
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int git_filebuf_write(git_filebuf *lock, const void *buff, size_t len);
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int git_filebuf_reserve(git_filebuf *file, void **buff, size_t len);
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int git_filebuf_printf(git_filebuf *file, const char *format, ...) GIT_FORMAT_PRINTF(2, 3);
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int git_filebuf_open(git_filebuf *lock, const char *path, int flags, mode_t mode);
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int git_filebuf_commit(git_filebuf *lock);
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int git_filebuf_commit_at(git_filebuf *lock, const char *path);
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void git_filebuf_cleanup(git_filebuf *lock);
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int git_filebuf_hash(git_oid *oid, git_filebuf *file);
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int git_filebuf_flush(git_filebuf *file);
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int git_filebuf_stats(time_t *mtime, size_t *size, git_filebuf *file);
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#endif
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