t_manber_data Struct Reference

Everything needed to calculate manber-hashes out of a stream. More...

Data Fields
struct estat *	sts
	The entry this calculation is for.
svn_stream_t *	input
	The stream we're filtering.
off_t	last_fpos
	Start of the current block.
off_t	fpos
	The current position in the file.
apr_md5_ctx_t	full_md5_ctx
	MD5-Context of full file.
md5_digest_t	full_md5
	MD5 of full file.
apr_md5_ctx_t	block_md5_ctx
	MD5-Context of current block.
md5_digest_t	block_md5
	MD5 of last block.
int	manber_fd
	The file descriptor where the manber-block-MD5s will be written to.
AC_CV_C_UINT32_T	state
	The internal manber-state.
AC_CV_C_UINT32_T	last_state
	The previous manber-state.
int	bktrk_bytes
	Count of bytes in backtrack buffer.
int	bktrk_last
	The last byte in the rotating backtrack-buffer.
unsigned char	backtrack [CS__MANBER_BACKTRACK]
	The backtrack buffer.
int	data_bits
	Flag to see whether we're in a zero-bytes block.

Detailed Description

Everything needed to calculate manber-hashes out of a stream.

Definition at line 39 of file checksum.c.

Field Documentation

unsigned char t_manber_data::backtrack[CS__MANBER_BACKTRACK]

The backtrack buffer.

Definition at line 73 of file checksum.c.

Referenced by cs___end_of_block().

int t_manber_data::bktrk_bytes

Count of bytes in backtrack buffer.

Definition at line 69 of file checksum.c.

Referenced by cs___end_of_block().

int t_manber_data::bktrk_last

The last byte in the rotating backtrack-buffer.

Definition at line 71 of file checksum.c.

Referenced by cs___end_of_block().

md5_digest_t t_manber_data::block_md5

MD5 of last block.

Definition at line 58 of file checksum.c.

Referenced by cs___end_of_block(), cs___update_manber(), and cs__compare_file().

apr_md5_ctx_t t_manber_data::block_md5_ctx

MD5-Context of current block.

Definition at line 56 of file checksum.c.

Referenced by cs___end_of_block().

int t_manber_data::data_bits

Flag to see whether we're in a zero-bytes block.

If there are large blocks with only \0 in them, we don't CRC or MD5 them - just output as zero blocks with a MD5 of \0*16. Useful for sparse files.

Definition at line 78 of file checksum.c.

Referenced by cs___end_of_block().

off_t t_manber_data::fpos

The current position in the file.

Is always >= last_fpos.

Definition at line 48 of file checksum.c.

Referenced by cs___end_of_block(), cs___manber_data_init(), cs___mnbs_close(), cs___update_manber(), and cs__compare_file().