-
Notifications
You must be signed in to change notification settings - Fork 2
/
whole.c
182 lines (143 loc) · 4.45 KB
/
whole.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
*
* librsync -- the library for network deltas
* $Id$
*
* Copyright (C) 2000, 2001 by Martin Pool <[email protected]>
*
* 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.h>
#include <assert.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "librsync.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;
}