| -rw-r--r-- | rsync/buf.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/rsync/buf.c b/rsync/buf.c index c978fff..fdd67ee 100644 --- a/rsync/buf.c +++ b/rsync/buf.c @@ -3,214 +3,216 @@ * 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. */ /* | Pick a window, Jimmy, you're leaving. | -- Martin Schwenke, regularly */ /* * buf.c -- Buffers that map between stdio file streams and librsync * streams. As the stream consumes input and produces output, it is * refilled from appropriate input and output FILEs. A dynamically * allocated buffer of configurable size is used as an intermediary. * * TODO: Perhaps be more efficient by filling the buffer on every call * even if not yet completely empty. Check that it's really our * buffer, and shuffle remaining data down to the front. * * TODO: Perhaps expose a routine for shuffling the buffers. */ #include <config_rsync.h> #include <assert.h> #include <stdlib.h> #include <stdio.h> #include <errno.h> #include <string.h> #include "rsync.h" #include "trace.h" #include "buf.h" #include "util.h" /** * File IO buffer sizes. */ int rs_inbuflen = 16000, rs_outbuflen = 16000; struct rs_filebuf { FILE *f; char *buf; size_t buf_len; }; rs_filebuf_t *rs_filebuf_new(FILE *f, size_t buf_len) { rs_filebuf_t *pf = rs_alloc_struct(rs_filebuf_t); pf->buf = rs_alloc(buf_len, "file buffer"); pf->buf_len = buf_len; pf->f = f; return pf; } void rs_filebuf_free(rs_filebuf_t *fb) { if ( fb->buf ) free ( fb->buf ); rs_bzero(fb, sizeof *fb); free(fb); } /* * If the stream has no more data available, read some from F into * BUF, and let the stream use that. On return, SEEN_EOF is true if * the end of file has passed into the stream. */ rs_result rs_infilebuf_fill(rs_job_t *job, rs_buffers_t *buf, void *opaque) { - job=job; int len; rs_filebuf_t *fb = (rs_filebuf_t *) opaque; FILE *f = fb->f; + job=job; // fix unused warning + /* This is only allowed if either the buf has no input buffer * yet, or that buffer could possibly be BUF. */ if (buf->next_in != NULL) { assert(buf->avail_in <= fb->buf_len); assert(buf->next_in >= fb->buf); assert(buf->next_in <= fb->buf + fb->buf_len); } else { assert(buf->avail_in == 0); } if (buf->eof_in || (buf->eof_in = feof(f))) { rs_trace("seen end of file on input"); buf->eof_in = 1; return RS_DONE; } if (buf->avail_in) /* Still some data remaining. Perhaps we should read anyhow? */ return RS_DONE; len = fread(fb->buf, 1, fb->buf_len, f); if (len < 0) { if (ferror(f)) { rs_error("error filling buf from file: %s", strerror(errno)); return RS_IO_ERROR; } else { rs_error("no error bit, but got %d return when trying to read", len); return RS_IO_ERROR; } } buf->avail_in = len; buf->next_in = fb->buf; return RS_DONE; } /* * The buf is already using BUF for an output buffer, and probably * contains some buffered output now. Write this out to F, and reset * the buffer cursor. */ rs_result rs_outfilebuf_drain(rs_job_t *job, rs_buffers_t *buf, void *opaque) { - job=job; int present; rs_filebuf_t *fb = (rs_filebuf_t *) opaque; FILE *f = fb->f; + job=job; // fix unused warning + /* This is only allowed if either the buf has no output buffer * yet, or that buffer could possibly be BUF. */ if (buf->next_out == NULL) { assert(buf->avail_out == 0); buf->next_out = fb->buf; buf->avail_out = fb->buf_len; return RS_DONE; } assert(buf->avail_out <= fb->buf_len); assert(buf->next_out >= fb->buf); assert(buf->next_out <= fb->buf + fb->buf_len); present = buf->next_out - fb->buf; if (present > 0) { int result; assert(present > 0); result = fwrite(fb->buf, 1, present, f); if (present != result) { rs_error("error draining buf to file: %s", strerror(errno)); return RS_IO_ERROR; } buf->next_out = fb->buf; buf->avail_out = fb->buf_len; } return RS_DONE; } /** * Default copy implementation that retrieves a part of a stdio file. */ rs_result rs_file_copy_cb(void *arg, off_t pos, size_t *len, void **buf) { int got; FILE *f = (FILE *) arg; if (fseek(f, pos, SEEK_SET)) { rs_log(RS_LOG_ERR, "seek failed: %s", strerror(errno)); return RS_IO_ERROR; } got = fread(*buf, 1, *len, f); if (got == -1) { rs_error(strerror(errno)); return RS_IO_ERROR; } else if (got == 0) { rs_error("unexpected eof on fd%d", fileno(f)); return RS_INPUT_ENDED; } else { *len = got; return RS_DONE; } } |