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diff --git a/rsync/buf.c b/rsync/buf.c
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--- a/rsync/buf.c
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1/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- 1/*= -*- c-basic-offset: 4; indent-tabs-mode: nil; -*-
2 * 2 *
3 * librsync -- the library for network deltas 3 * librsync -- the library for network deltas
4 * $Id$ 4 * $Id$
5 * 5 *
6 * Copyright (C) 2000, 2001 by Martin Pool <mbp@samba.org> 6 * Copyright (C) 2000, 2001 by Martin Pool <mbp@samba.org>
7 * 7 *
8 * This program is free software; you can redistribute it and/or 8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public License 9 * modify it under the terms of the GNU Lesser General Public License
10 * as published by the Free Software Foundation; either version 2.1 of 10 * as published by the Free Software Foundation; either version 2.1 of
11 * the License, or (at your option) any later version. 11 * the License, or (at your option) any later version.
12 * 12 *
13 * This program is distributed in the hope that it will be useful, but 13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details. 16 * Lesser General Public License for more details.
17 * 17 *
18 * You should have received a copy of the GNU Lesser General Public 18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this program; if not, write to the Free Software 19 * License along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */ 21 */
22 22
23 /* 23 /*
24 | Pick a window, Jimmy, you're leaving. 24 | Pick a window, Jimmy, you're leaving.
25 | -- Martin Schwenke, regularly 25 | -- Martin Schwenke, regularly
26 */ 26 */
27 27
28 28
29/* 29/*
30 * buf.c -- Buffers that map between stdio file streams and librsync 30 * buf.c -- Buffers that map between stdio file streams and librsync
31 * streams. As the stream consumes input and produces output, it is 31 * streams. As the stream consumes input and produces output, it is
32 * refilled from appropriate input and output FILEs. A dynamically 32 * refilled from appropriate input and output FILEs. A dynamically
33 * allocated buffer of configurable size is used as an intermediary. 33 * allocated buffer of configurable size is used as an intermediary.
34 * 34 *
35 * TODO: Perhaps be more efficient by filling the buffer on every call 35 * TODO: Perhaps be more efficient by filling the buffer on every call
36 * even if not yet completely empty. Check that it's really our 36 * even if not yet completely empty. Check that it's really our
37 * buffer, and shuffle remaining data down to the front. 37 * buffer, and shuffle remaining data down to the front.
38 * 38 *
39 * TODO: Perhaps expose a routine for shuffling the buffers. 39 * TODO: Perhaps expose a routine for shuffling the buffers.
40 */ 40 */
41 41
42 42
43#include <config_rsync.h> 43#include <config_rsync.h>
44 44
45#include <assert.h> 45#include <assert.h>
46#include <stdlib.h> 46#include <stdlib.h>
47#include <stdio.h> 47#include <stdio.h>
48#include <errno.h> 48#include <errno.h>
49#include <string.h> 49#include <string.h>
50 50
51#include "rsync.h" 51#include "rsync.h"
52#include "trace.h" 52#include "trace.h"
53#include "buf.h" 53#include "buf.h"
54#include "util.h" 54#include "util.h"
55 55
56/** 56/**
57 * File IO buffer sizes. 57 * File IO buffer sizes.
58 */ 58 */
59int rs_inbuflen = 16000, rs_outbuflen = 16000; 59int rs_inbuflen = 16000, rs_outbuflen = 16000;
60 60
61 61
62struct rs_filebuf { 62struct rs_filebuf {
63 FILE *f; 63 FILE *f;
64 char *buf; 64 char *buf;
65 size_t buf_len; 65 size_t buf_len;
66}; 66};
67 67
68 68
69 69
70rs_filebuf_t *rs_filebuf_new(FILE *f, size_t buf_len) 70rs_filebuf_t *rs_filebuf_new(FILE *f, size_t buf_len)
71{ 71{
72 rs_filebuf_t *pf = rs_alloc_struct(rs_filebuf_t); 72 rs_filebuf_t *pf = rs_alloc_struct(rs_filebuf_t);
73 73
74 pf->buf = rs_alloc(buf_len, "file buffer"); 74 pf->buf = rs_alloc(buf_len, "file buffer");
75 pf->buf_len = buf_len; 75 pf->buf_len = buf_len;
76 pf->f = f; 76 pf->f = f;
77 77
78 return pf; 78 return pf;
79} 79}
80 80
81 81
82void rs_filebuf_free(rs_filebuf_t *fb) 82void rs_filebuf_free(rs_filebuf_t *fb)
83{ 83{
84 if ( fb->buf ) 84 if ( fb->buf )
85 free ( fb->buf ); 85 free ( fb->buf );
86 rs_bzero(fb, sizeof *fb); 86 rs_bzero(fb, sizeof *fb);
87 free(fb); 87 free(fb);
88} 88}
89 89
90 90
91/* 91/*
92 * If the stream has no more data available, read some from F into 92 * If the stream has no more data available, read some from F into
93 * BUF, and let the stream use that. On return, SEEN_EOF is true if 93 * BUF, and let the stream use that. On return, SEEN_EOF is true if
94 * the end of file has passed into the stream. 94 * the end of file has passed into the stream.
95 */ 95 */
96rs_result rs_infilebuf_fill(rs_job_t *job, rs_buffers_t *buf, 96rs_result rs_infilebuf_fill(rs_job_t *job, rs_buffers_t *buf,
97 void *opaque) 97 void *opaque)
98{ 98{
99 job=job;
99 int len; 100 int len;
100 rs_filebuf_t *fb = (rs_filebuf_t *) opaque; 101 rs_filebuf_t *fb = (rs_filebuf_t *) opaque;
101 FILE *f = fb->f; 102 FILE *f = fb->f;
102 103
103 /* This is only allowed if either the buf has no input buffer 104 /* This is only allowed if either the buf has no input buffer
104 * yet, or that buffer could possibly be BUF. */ 105 * yet, or that buffer could possibly be BUF. */
105 if (buf->next_in != NULL) { 106 if (buf->next_in != NULL) {
106 assert(buf->avail_in <= fb->buf_len); 107 assert(buf->avail_in <= fb->buf_len);
107 assert(buf->next_in >= fb->buf); 108 assert(buf->next_in >= fb->buf);
108 assert(buf->next_in <= fb->buf + fb->buf_len); 109 assert(buf->next_in <= fb->buf + fb->buf_len);
109 } else { 110 } else {
110 assert(buf->avail_in == 0); 111 assert(buf->avail_in == 0);
111 } 112 }
112 113
113 if (buf->eof_in || (buf->eof_in = feof(f))) { 114 if (buf->eof_in || (buf->eof_in = feof(f))) {
114 rs_trace("seen end of file on input"); 115 rs_trace("seen end of file on input");
115 buf->eof_in = 1; 116 buf->eof_in = 1;
116 return RS_DONE; 117 return RS_DONE;
117 } 118 }
118 119
119 if (buf->avail_in) 120 if (buf->avail_in)
120 /* Still some data remaining. Perhaps we should read 121 /* Still some data remaining. Perhaps we should read
121 anyhow? */ 122 anyhow? */
122 return RS_DONE; 123 return RS_DONE;
123 124
124 len = fread(fb->buf, 1, fb->buf_len, f); 125 len = fread(fb->buf, 1, fb->buf_len, f);
125 if (len < 0) { 126 if (len < 0) {
126 if (ferror(f)) { 127 if (ferror(f)) {
127 rs_error("error filling buf from file: %s", 128 rs_error("error filling buf from file: %s",
128 strerror(errno)); 129 strerror(errno));
129 return RS_IO_ERROR; 130 return RS_IO_ERROR;
130 } else { 131 } else {
131 rs_error("no error bit, but got %d return when trying to read", 132 rs_error("no error bit, but got %d return when trying to read",
132 len); 133 len);
133 return RS_IO_ERROR; 134 return RS_IO_ERROR;
134 } 135 }
135 } 136 }
136 buf->avail_in = len; 137 buf->avail_in = len;
137 buf->next_in = fb->buf; 138 buf->next_in = fb->buf;
138 139
139 return RS_DONE; 140 return RS_DONE;
140} 141}
141 142
142 143
143/* 144/*
144 * The buf is already using BUF for an output buffer, and probably 145 * The buf is already using BUF for an output buffer, and probably
145 * contains some buffered output now. Write this out to F, and reset 146 * contains some buffered output now. Write this out to F, and reset
146 * the buffer cursor. 147 * the buffer cursor.
147 */ 148 */
148rs_result rs_outfilebuf_drain(rs_job_t *job, rs_buffers_t *buf, void *opaque) 149rs_result rs_outfilebuf_drain(rs_job_t *job, rs_buffers_t *buf, void *opaque)
149{ 150{
151 job=job;
150 int present; 152 int present;
151 rs_filebuf_t *fb = (rs_filebuf_t *) opaque; 153 rs_filebuf_t *fb = (rs_filebuf_t *) opaque;
152 FILE *f = fb->f; 154 FILE *f = fb->f;
153 155
154 /* This is only allowed if either the buf has no output buffer 156 /* This is only allowed if either the buf has no output buffer
155 * yet, or that buffer could possibly be BUF. */ 157 * yet, or that buffer could possibly be BUF. */
156 if (buf->next_out == NULL) { 158 if (buf->next_out == NULL) {
157 assert(buf->avail_out == 0); 159 assert(buf->avail_out == 0);
158 160
159 buf->next_out = fb->buf; 161 buf->next_out = fb->buf;
160 buf->avail_out = fb->buf_len; 162 buf->avail_out = fb->buf_len;
161 163
162 return RS_DONE; 164 return RS_DONE;
163 } 165 }
164 166
165 assert(buf->avail_out <= fb->buf_len); 167 assert(buf->avail_out <= fb->buf_len);
166 assert(buf->next_out >= fb->buf); 168 assert(buf->next_out >= fb->buf);
167 assert(buf->next_out <= fb->buf + fb->buf_len); 169 assert(buf->next_out <= fb->buf + fb->buf_len);
168 170
169 present = buf->next_out - fb->buf; 171 present = buf->next_out - fb->buf;
170 if (present > 0) { 172 if (present > 0) {
171 int result; 173 int result;
172 174
173 assert(present > 0); 175 assert(present > 0);
174 176
175 result = fwrite(fb->buf, 1, present, f); 177 result = fwrite(fb->buf, 1, present, f);
176 if (present != result) { 178 if (present != result) {
177 rs_error("error draining buf to file: %s", 179 rs_error("error draining buf to file: %s",
178 strerror(errno)); 180 strerror(errno));
179 return RS_IO_ERROR; 181 return RS_IO_ERROR;
180 } 182 }
181 183
182 buf->next_out = fb->buf; 184 buf->next_out = fb->buf;
183 buf->avail_out = fb->buf_len; 185 buf->avail_out = fb->buf_len;
184 } 186 }
185 187
186 return RS_DONE; 188 return RS_DONE;
187} 189}
188 190
189 191
190/** 192/**
191 * Default copy implementation that retrieves a part of a stdio file. 193 * Default copy implementation that retrieves a part of a stdio file.
192 */ 194 */
193rs_result rs_file_copy_cb(void *arg, off_t pos, size_t *len, void **buf) 195rs_result rs_file_copy_cb(void *arg, off_t pos, size_t *len, void **buf)
194{ 196{
195 int got; 197 int got;
196 FILE *f = (FILE *) arg; 198 FILE *f = (FILE *) arg;
197 199
198 if (fseek(f, pos, SEEK_SET)) { 200 if (fseek(f, pos, SEEK_SET)) {
199 rs_log(RS_LOG_ERR, "seek failed: %s", strerror(errno)); 201 rs_log(RS_LOG_ERR, "seek failed: %s", strerror(errno));
200 return RS_IO_ERROR; 202 return RS_IO_ERROR;
201 } 203 }
202 204
203 got = fread(*buf, 1, *len, f); 205 got = fread(*buf, 1, *len, f);
204 if (got == -1) { 206 if (got == -1) {
205 rs_error(strerror(errno)); 207 rs_error(strerror(errno));
206 return RS_IO_ERROR; 208 return RS_IO_ERROR;
207 } else if (got == 0) { 209 } else if (got == 0) {
208 rs_error("unexpected eof on fd%d", fileno(f)); 210 rs_error("unexpected eof on fd%d", fileno(f));
209 return RS_INPUT_ENDED; 211 return RS_INPUT_ENDED;
210 } else { 212 } else {
211 *len = got; 213 *len = got;
212 return RS_DONE; 214 return RS_DONE;
213 } 215 }
214} 216}