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|
/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
*
* librsync -- the library for network deltas
* $Id$
*
* Copyright (C) 2000, 2001 by Martin Pool <mbp@samba.org>
*
* 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 <config_rsync.h>
#include <assert.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <rsync.h>
#include "trace.h"
#include "fileutil.h"
#include "sumset.h"
#include "job.h"
#include "buf.h"
#include "whole.h"
#include "util.h"
/**
* Run a job continuously, with input to/from the two specified files.
* The job should already be set up, and must be free by the caller
* after return.
*
* Buffers of ::rs_inbuflen and ::rs_outbuflen are allocated for
* temporary storage.
*
* \param in_file Source of input bytes, or NULL if the input buffer
* should not be filled.
*
* \return RS_DONE if the job completed, or otherwise an error result.
*/
rs_result
rs_whole_run(rs_job_t *job, FILE *in_file, FILE *out_file)
{
rs_buffers_t buf;
rs_result result;
rs_filebuf_t *in_fb = NULL, *out_fb = NULL;
if (in_file)
in_fb = rs_filebuf_new(in_file, rs_inbuflen);
if (out_file)
out_fb = rs_filebuf_new(out_file, rs_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;
}
/**
* Generate the signature of a basis file, and write it out to
* another.
*
* \param new_block_len block size for signature generation, in bytes
*
* \param strong_len truncated length of strong checksums, in bytes
*
* \sa rs_sig_begin()
*/
rs_result
rs_sig_file(FILE *old_file, FILE *sig_file, size_t new_block_len,
size_t strong_len, rs_stats_t *stats)
{
rs_job_t *job;
rs_result r;
job = rs_sig_begin(new_block_len, strong_len);
r = rs_whole_run(job, old_file, sig_file);
if (stats)
memcpy(stats, &job->stats, sizeof *stats);
rs_job_free(job);
return r;
}
/**
* Load signatures from a signature file into memory. Return a
* pointer to the newly allocated structure in SUMSET.
*
* \sa rs_readsig_begin()
*/
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);
r = rs_whole_run(job, sig_file, NULL);
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);
r = rs_whole_run(job, new_file, delta_file);
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);
r = rs_whole_run(job, delta_file, new_file);
if (stats)
memcpy(stats, &job->stats, sizeof *stats);
rs_job_free(job);
return r;
}
|
