static svn_error_t *
write_handler_checksum(void *baton, const char *buffer, apr_size_t *len)
{
struct checksum_stream_baton *btn = baton;
if (btn->write_checksum && *len > 0)
SVN_ERR(svn_checksum_update(btn->write_ctx, buffer, *len));
return svn_error_trace(svn_stream_write(btn->proxy, buffer, len));
}
svn_error_t *svn_txdelta_send_stream(svn_stream_t *stream,
svn_txdelta_window_handler_t handler,
void *handler_baton,
unsigned char *digest,
apr_pool_t *pool)
{
svn_txdelta_window_t delta_window = { 0 };
svn_txdelta_op_t delta_op;
svn_string_t window_data;
char read_buf[SVN__STREAM_CHUNK_SIZE + 1];
svn_checksum_ctx_t *md5_checksum_ctx;
if (digest)
md5_checksum_ctx = svn_checksum_ctx_create(svn_checksum_md5, pool);
while (1)
{
apr_size_t read_len = SVN__STREAM_CHUNK_SIZE;
SVN_ERR(svn_stream_read_full(stream, read_buf, &read_len));
if (read_len == 0)
break;
window_data.data = read_buf;
window_data.len = read_len;
delta_op.action_code = svn_txdelta_new;
delta_op.offset = 0;
delta_op.length = read_len;
delta_window.tview_len = read_len;
delta_window.num_ops = 1;
delta_window.ops = &delta_op;
delta_window.new_data = &window_data;
SVN_ERR(handler(&delta_window, handler_baton));
if (digest)
SVN_ERR(svn_checksum_update(md5_checksum_ctx, read_buf, read_len));
if (read_len < SVN__STREAM_CHUNK_SIZE)
break;
}
SVN_ERR(handler(NULL, handler_baton));
if (digest)
{
svn_checksum_t *md5_checksum;
SVN_ERR(svn_checksum_final(&md5_checksum, md5_checksum_ctx, pool));
memcpy(digest, md5_checksum->digest, APR_MD5_DIGESTSIZE);
}
return SVN_NO_ERROR;
}
static svn_error_t *
read_handler_checksum(void *baton, char *buffer, apr_size_t *len)
{
struct checksum_stream_baton *btn = baton;
apr_size_t saved_len = *len;
SVN_ERR(svn_stream_read(btn->proxy, buffer, len));
if (btn->read_checksum)
SVN_ERR(svn_checksum_update(btn->read_ctx, buffer, *len));
if (saved_len != *len)
btn->read_more = FALSE;
return SVN_NO_ERROR;
}
static svn_error_t *
txdelta_next_window(svn_txdelta_window_t **window,
void *baton,
apr_pool_t *pool)
{
struct txdelta_baton *b = baton;
apr_size_t source_len = SVN_DELTA_WINDOW_SIZE;
apr_size_t target_len = SVN_DELTA_WINDOW_SIZE;
/* Read the source stream. */
if (b->more_source)
{
SVN_ERR(svn_stream_read(b->source, b->buf, &source_len));
b->more_source = (source_len == SVN_DELTA_WINDOW_SIZE);
}
else
source_len = 0;
/* Read the target stream. */
SVN_ERR(svn_stream_read(b->target, b->buf + source_len, &target_len));
b->pos += source_len;
if (target_len == 0)
{
/* No target data? We're done; return the final window. */
if (b->context != NULL)
SVN_ERR(svn_checksum_final(&b->checksum, b->context, b->result_pool));
*window = NULL;
b->more = FALSE;
return SVN_NO_ERROR;
}
else if (b->context != NULL)
SVN_ERR(svn_checksum_update(b->context, b->buf + source_len, target_len));
*window = compute_window(b->buf, source_len, target_len,
b->pos - source_len, pool);
/* That's it. */
return SVN_NO_ERROR;
}
