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/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
*
* librsync -- the library for network deltas
*
* Copyright (C) 2000, 2001, 2014 by Martin Pool <mbp@sourcefrog.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "mdfour.h"
#include "checksum.h"
/** The contents of this structure are private. */
struct rs_job {
int dogtag;
/** Human-readable job operation name. */
const char *job_name;
rs_buffers_t *stream;
/** Callback for each processing step. */
rs_result (*statefn)(rs_job_t *);
/** Final result of processing job. Used by rs_job_s_failed(). */
rs_result final_result;
/* Arguments for initializing the signature used by mksum.c and readsums.c.
*/
int sig_magic;
int sig_block_len;
int sig_strong_len;
/** The size of the signature file if available. Used by loadsums.c when
* initializing the signature to preallocate memory. */
rs_long_t sig_fsize;
/** Pointer to the signature that's being used by the operation. */
rs_signature_t *signature;
/** Flag indicating signature should be destroyed with the job. */
int job_owns_sig;
/** Command byte currently being processed, if any. */
unsigned char op;
/** The weak signature digest used by readsums.c */
rs_weak_sum_t weak_sig;
/** The rollsum weak signature accumulator used by delta.c */
weaksum_t weak_sum;
/** Lengths of expected parameters. */
rs_long_t param1, param2;
struct rs_prototab_ent const *cmd;
rs_mdfour_t output_md4;
/** Encoding statistics. */
rs_stats_t stats;
/** Buffer of data in the scoop. Allocation is scoop_buf[0..scoop_alloc],
* and scoop_next[0..scoop_avail] contains data yet to be processed.
* scoop_next[scoop_pos..scoop_avail] is the data yet to be scanned. */
rs_byte_t *scoop_buf; /* the allocation pointer */
rs_byte_t *scoop_next; /* the data pointer */
size_t scoop_alloc; /* the allocation size */
size_t scoop_avail; /* the data size */
size_t scoop_pos; /* the scan position */
/** If USED is >0, then buf contains that much write data to be sent out. */
rs_byte_t write_buf[36];
int write_len;
/** If \p copy_len is >0, then that much data should be copied through
* from the input. */
rs_long_t copy_len;
/** Copy from the basis position. */
rs_long_t basis_pos, basis_len;
/** Callback used to copy data from the basis into the output. */
rs_copy_cb *copy_cb;
void *copy_arg;
};
rs_job_t *rs_job_new(const char *, rs_result (*statefn)(rs_job_t *));
int rs_job_input_is_ending(rs_job_t *job);
/** Magic job tag number for checking jobs have been initialized. */
#define RS_JOB_TAG 20010225
/** Assert that a job is valid.
*
* We don't use a static inline function here so that assert failure output
* points at where rs_job_check() was called from. */
#define rs_job_check(job) do {\
assert(job->dogtag == RS_JOB_TAG);\
} while (0)