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/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
*
* librsync -- the library for network deltas
*
* Copyright 2000, 2001, 2014, 2015 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.
*/
/*=
| Is it possible that software is not
| like anything else, that it is meant
| to be discarded: that the whole point
| is to always see it as a soap bubble?
| -- Alan Perlis
*/
#include <stdio.h>
#include <string.h>
#include "librsync.h"
#include "whole.h"
#include "sumset.h"
#include "job.h"
#include "buf.h"
#include "librsync_export.h"
/** Whole file IO buffer sizes. */
LIBRSYNC_EXPORT int rs_inbuflen = 0, rs_outbuflen = 0;
rs_result rs_whole_run(rs_job_t *job, FILE *in_file, FILE *out_file,
int inbuflen, int outbuflen)
{
rs_buffers_t buf;
rs_result result;
rs_filebuf_t *in_fb = NULL, *out_fb = NULL;
/* Override buffer sizes if rs_inbuflen or rs_outbuflen are set. */
inbuflen = rs_inbuflen ? rs_inbuflen : inbuflen;
outbuflen = rs_outbuflen ? rs_outbuflen : outbuflen;
if (in_file)
in_fb = rs_filebuf_new(in_file, inbuflen);
if (out_file)
out_fb = rs_filebuf_new(out_file, outbuflen);
result =
rs_job_drive(job, &buf, in_fb ? rs_infilebuf_fill : NULL, in_fb,
out_fb ? rs_outfilebuf_drain : NULL, out_fb);
if (in_fb)
rs_filebuf_free(in_fb);
if (out_fb)
rs_filebuf_free(out_fb);
return result;
}
rs_result rs_sig_file(FILE *old_file, FILE *sig_file, size_t block_len,
size_t strong_len, rs_magic_number sig_magic,
rs_stats_t *stats)
{
rs_job_t *job;
rs_result r;
rs_long_t old_fsize = rs_file_size(old_file);
if ((r =
rs_sig_args(old_fsize, &sig_magic, &block_len,
&strong_len)) != RS_DONE)
return r;
job = rs_sig_begin(block_len, strong_len, sig_magic);
/* Size inbuf for 4 blocks, outbuf for header + 4 blocksums. */
r = rs_whole_run(job, old_file, sig_file, 4 * (int)block_len,
12 + 4 * (4 + (int)strong_len));
if (stats)
memcpy(stats, &job->stats, sizeof *stats);
rs_job_free(job);
return r;
}
rs_result rs_loadsig_file(FILE *sig_file, rs_signature_t **sumset,
rs_stats_t *stats)
{
rs_job_t *job;
rs_result r;
job = rs_loadsig_begin(sumset);
/* Set filesize used to estimate signature size. */
job->sig_fsize = rs_file_size(sig_file);
/* Size inbuf for 1024x 16 byte blocksums. */
r = rs_whole_run(job, sig_file, NULL, 1024 * 16, 0);
if (stats)
memcpy(stats, &job->stats, sizeof *stats);
rs_job_free(job);
return r;
}
rs_result rs_delta_file(rs_signature_t *sig, FILE *new_file, FILE *delta_file,
rs_stats_t *stats)
{
rs_job_t *job;
rs_result r;
job = rs_delta_begin(sig);
/* Size inbuf for 4*(CMD + 1 block), outbuf for 4*CMD. */
r = rs_whole_run(job, new_file, delta_file,
4 * (MAX_DELTA_CMD + sig->block_len), 4 * MAX_DELTA_CMD);
if (stats)
memcpy(stats, &job->stats, sizeof *stats);
rs_job_free(job);
return r;
}
rs_result rs_patch_file(FILE *basis_file, FILE *delta_file, FILE *new_file,
rs_stats_t *stats)
{
rs_job_t *job;
rs_result r;
job = rs_patch_begin(rs_file_copy_cb, basis_file);
/* Default size inbuf 1*CMD and outbuf 4*CMD. */
r = rs_whole_run(job, delta_file, new_file, MAX_DELTA_CMD,
4 * MAX_DELTA_CMD);
if (stats)
memcpy(stats, &job->stats, sizeof *stats);
rs_job_free(job);
return r;
}
|
