static svn_error_t *
file_textdelta(void *file_baton,
const char *base_checksum,
apr_pool_t *result_pool,
svn_txdelta_window_handler_t *handler,
void **handler_baton)
{
struct file_baton_t *fb = file_baton;
svn_stream_t *target;
SVN_ERR_ASSERT(! fb->writing);
SVN_ERR(svn_stream_open_writable(&target, fb->local_abspath, fb->pool,
fb->pool));
fb->writing = TRUE;
svn_txdelta_apply(svn_stream_empty(fb->pool) /* source */,
target,
fb->digest,
fb->local_abspath,
fb->pool,
/* Provide the handler directly */
handler, handler_baton);
return SVN_NO_ERROR;
}
inline Try<std::string> patch(const std::string& s, const Diff& diff)
{
// Initialize the Apache Portable Runtime subsystem, as necessary
// for using the svn library.
initialize();
// Note that svn_pool_create wraps apr_pool_create_ex, which is
// thread safe, see: http://goo.gl/NX0hps.
apr_pool_t* pool = svn_pool_create(NULL);
// We want to apply the svndiff format diff to the source trying to
// produce a result. First setup a handler for applying a text delta
// to the source stream.
svn_string_t source;
source.data = s.data();
source.len = s.length();
svn_txdelta_window_handler_t handler;
void* baton = NULL;
svn_stringbuf_t* patched = svn_stringbuf_create_ensure(s.length(), pool);
svn_txdelta_apply(
svn_stream_from_string(&source, pool),
svn_stream_from_stringbuf(patched, pool),
NULL,
NULL,
pool,
&handler,
&baton);
// Setup a stream that converts an svndiff format diff to a text
// delta, so that we can use our handler to patch the source string.
svn_stream_t* stream = svn_txdelta_parse_svndiff(
handler,
baton,
TRUE,
pool);
// Now feed the diff into the stream to compute the patched result.
const char* data = diff.data.data();
apr_size_t length = diff.data.length();
svn_error_t* error = svn_stream_write(stream, data, &length);
if (error != NULL) {
char buffer[1024];
std::string message(svn_err_best_message(error, buffer, 1024));
svn_pool_destroy(pool);
return Error(message);
}
std::string result(patched->data, patched->len);
svn_pool_destroy(pool);
return result;
}
/* Subversion delta editor callback */
static svn_error_t *de_apply_textdelta(void *file_baton, const char *base_checksum, apr_pool_t *pool, svn_txdelta_window_handler_t *handler, void **handler_baton)
{
apr_file_t *src_file = NULL, *dest_file = NULL;
svn_stream_t *src_stream, *dest_stream;
de_node_baton_t *node = (de_node_baton_t *)file_baton;
dump_options_t *opts = node->de_baton->opts;
#ifdef USE_TIMING
stopwatch_t watch = stopwatch_create();
#endif
char *filename;
DEBUG_MSG("de_apply_textdelta(%s)\n", node->path);
/* Create a new temporary file to write to */
node->filename = apr_psprintf(node->pool, "%s/XXXXXX", opts->temp_dir);
apr_file_mktemp(&dest_file, node->filename, APR_CREATE | APR_READ | APR_WRITE | APR_EXCL, pool);
dest_stream = svn_stream_from_aprfile2(dest_file, FALSE, pool);
/* Update the local copy */
filename = rhash_get(delta_hash, node->path, APR_HASH_KEY_STRING);
if (filename == NULL) {
src_stream = svn_stream_empty(pool);
} else {
apr_file_open(&src_file, filename, APR_READ, 0600, pool);
src_stream = svn_stream_from_aprfile2(src_file, FALSE, pool);
}
svn_txdelta_apply(src_stream, dest_stream, node->md5sum, node->path, pool, handler, handler_baton);
node->old_filename = apr_pstrdup(node->pool, filename);
rhash_set(delta_hash, node->path, APR_HASH_KEY_STRING, node->filename, RHASH_VAL_STRING);
DEBUG_MSG("applied delta: %s -> %s\n", node->old_filename, node->filename);
node->applied_delta = 1;
node->dump_needed = 1;
#ifdef USE_TIMING
tm_de_apply_textdelta += stopwatch_elapsed(&watch);
#endif
return SVN_NO_ERROR;
}
static svn_error_t *
file_textdelta(void *file_baton,
const char *base_checksum,
apr_pool_t *result_pool,
svn_txdelta_window_handler_t *handler,
void **handler_baton)
{
struct file_baton_t *fb = file_baton;
const char *target_dir = svn_dirent_dirname(fb->local_abspath, fb->pool);
svn_error_t *err;
svn_stream_t *source;
svn_stream_t *target;
SVN_ERR_ASSERT(! fb->writing_file);
err = svn_stream_open_readonly(&source, fb->local_abspath,
fb->pool, fb->pool);
if (err && APR_STATUS_IS_ENOENT(err->apr_err))
{
svn_error_clear(err);
source = svn_stream_empty(fb->pool);
}
else
SVN_ERR(err);
SVN_ERR(svn_stream_open_unique(&target, &fb->writing_file,
target_dir, svn_io_file_del_none,
fb->pool, fb->pool));
svn_txdelta_apply(source,
target,
fb->digest,
fb->local_abspath,
fb->pool,
/* Provide the handler directly */
handler, handler_baton);
return SVN_NO_ERROR;
}
static svn_error_t *
file_rev_handler(void *baton, const char *path, svn_revnum_t revnum,
apr_hash_t *rev_props,
svn_boolean_t merged_revision,
svn_txdelta_window_handler_t *content_delta_handler,
void **content_delta_baton,
apr_array_header_t *prop_diffs,
apr_pool_t *pool)
{
struct file_rev_baton *frb = baton;
svn_stream_t *last_stream;
svn_stream_t *cur_stream;
struct delta_baton *delta_baton;
apr_pool_t *filepool;
/* Clear the current pool. */
svn_pool_clear(frb->currpool);
/* If this file has a non-textual mime-type, bail out. */
if (! frb->ignore_mime_type)
SVN_ERR(check_mimetype(prop_diffs, frb->target, frb->currpool));
if (frb->ctx->notify_func2)
{
svn_wc_notify_t *notify
= svn_wc_create_notify_url(
svn_path_url_add_component2(frb->repos_root_url,
path+1, pool),
svn_wc_notify_blame_revision, pool);
notify->path = path;
notify->kind = svn_node_none;
notify->content_state = notify->prop_state
= svn_wc_notify_state_inapplicable;
notify->lock_state = svn_wc_notify_lock_state_inapplicable;
notify->revision = revnum;
notify->rev_props = rev_props;
frb->ctx->notify_func2(frb->ctx->notify_baton2, notify, pool);
}
if (frb->ctx->cancel_func)
SVN_ERR(frb->ctx->cancel_func(frb->ctx->cancel_baton));
/* If there were no content changes, we couldn't care less about this
revision now. Note that we checked the mime type above, so things
work if the user just changes the mime type in a commit.
Also note that we don't switch the pools in this case. This is important,
since the tempfile will be removed by the pool and we need the tempfile
from the last revision with content changes. */
if (!content_delta_handler)
return SVN_NO_ERROR;
frb->merged_revision = merged_revision;
/* Create delta baton. */
delta_baton = apr_palloc(frb->currpool, sizeof(*delta_baton));
/* Prepare the text delta window handler. */
if (frb->last_filename)
SVN_ERR(svn_stream_open_readonly(&delta_baton->source_stream, frb->last_filename,
frb->currpool, pool));
else
/* Means empty stream below. */
delta_baton->source_stream = NULL;
last_stream = svn_stream_disown(delta_baton->source_stream, pool);
if (frb->include_merged_revisions && !frb->merged_revision)
filepool = frb->filepool;
else
filepool = frb->currpool;
SVN_ERR(svn_stream_open_unique(&cur_stream, &delta_baton->filename, NULL,
svn_io_file_del_on_pool_cleanup,
filepool, filepool));
/* Get window handler for applying delta. */
svn_txdelta_apply(last_stream, cur_stream, NULL, NULL,
frb->currpool,
&delta_baton->wrapped_handler,
&delta_baton->wrapped_baton);
/* Wrap the window handler with our own. */
delta_baton->file_rev_baton = frb;
*content_delta_handler = window_handler;
*content_delta_baton = delta_baton;
/* Create the rev structure. */
frb->rev = apr_pcalloc(frb->mainpool, sizeof(struct rev));
if (revnum < frb->start_rev)
{
/* We shouldn't get more than one revision before the starting
revision (unless of including merged revisions). */
SVN_ERR_ASSERT((frb->last_filename == NULL)
|| frb->include_merged_revisions);
/* The file existed before start_rev; generate no blame info for
lines from this revision (or before). */
frb->rev->revision = SVN_INVALID_REVNUM;
}
else
{
SVN_ERR_ASSERT(revnum <= frb->end_rev);
/* Set values from revision props. */
frb->rev->revision = revnum;
frb->rev->rev_props = svn_prop_hash_dup(rev_props, frb->mainpool);
}
if (frb->include_merged_revisions)
frb->rev->path = apr_pstrdup(frb->mainpool, path);
return SVN_NO_ERROR;
}
static svn_error_t *
file_rev_handler(void *baton, const char *path, svn_revnum_t revnum,
apr_hash_t *rev_props,
svn_boolean_t merged_revision,
svn_txdelta_window_handler_t *content_delta_handler,
void **content_delta_baton,
apr_array_header_t *prop_diffs,
apr_pool_t *pool)
{
struct file_rev_baton *frb = baton;
svn_stream_t *last_stream;
svn_stream_t *cur_stream;
struct delta_baton *delta_baton;
apr_pool_t *filepool;
/* Clear the current pool. */
svn_pool_clear(frb->currpool);
/* If this file has a non-textual mime-type, bail out. */
if (! frb->ignore_mime_type)
SVN_ERR(check_mimetype(prop_diffs, frb->target, frb->currpool));
if (frb->ctx->notify_func2)
{
svn_wc_notify_t *notify
= svn_wc_create_notify(path, svn_wc_notify_blame_revision, pool);
notify->kind = svn_node_none;
notify->content_state = notify->prop_state
= svn_wc_notify_state_inapplicable;
notify->lock_state = svn_wc_notify_lock_state_inapplicable;
notify->revision = revnum;
frb->ctx->notify_func2(frb->ctx->notify_baton2, notify, pool);
}
if (frb->ctx->cancel_func)
SVN_ERR(frb->ctx->cancel_func(frb->ctx->cancel_baton));
/* If there were no content changes, we couldn't care less about this
revision now. Note that we checked the mime type above, so things
work if the user just changes the mime type in a commit.
Also note that we don't switch the pools in this case. This is important,
since the tempfile will be removed by the pool and we need the tempfile
from the last revision with content changes. */
if (!content_delta_handler)
return SVN_NO_ERROR;
frb->merged_revision = merged_revision;
/* Create delta baton. */
delta_baton = apr_palloc(frb->currpool, sizeof(*delta_baton));
/* Prepare the text delta window handler. */
if (frb->last_filename)
SVN_ERR(svn_io_file_open(&delta_baton->source_file, frb->last_filename,
APR_READ, APR_OS_DEFAULT, frb->currpool));
else
/* Means empty stream below. */
delta_baton->source_file = NULL;
last_stream = svn_stream_from_aprfile(delta_baton->source_file, pool);
if (frb->include_merged_revisions && !frb->merged_revision)
filepool = frb->filepool;
else
filepool = frb->currpool;
SVN_ERR(svn_io_open_unique_file2(&delta_baton->file,
&delta_baton->filename,
frb->tmp_path,
".tmp", svn_io_file_del_on_pool_cleanup,
filepool));
cur_stream = svn_stream_from_aprfile(delta_baton->file, frb->currpool);
/* Get window handler for applying delta. */
svn_txdelta_apply(last_stream, cur_stream, NULL, NULL,
frb->currpool,
&delta_baton->wrapped_handler,
&delta_baton->wrapped_baton);
/* Wrap the window handler with our own. */
delta_baton->file_rev_baton = frb;
*content_delta_handler = window_handler;
*content_delta_baton = delta_baton;
/* Create the rev structure. */
frb->rev = apr_palloc(frb->mainpool, sizeof(struct rev));
if (revnum < frb->start_rev)
{
/* We shouldn't get more than one revision before start. */
assert(frb->last_filename == NULL);
/* The file existed before start_rev; generate no blame info for
lines from this revision (or before). */
frb->rev->revision = SVN_INVALID_REVNUM;
frb->rev->author = NULL;
frb->rev->date = NULL;
}
else
{
svn_string_t *str;
assert(revnum <= frb->end_rev);
/* Set values from revision props. */
frb->rev->revision = revnum;
if ((str = apr_hash_get(rev_props, SVN_PROP_REVISION_AUTHOR,
sizeof(SVN_PROP_REVISION_AUTHOR) - 1)))
frb->rev->author = apr_pstrdup(frb->mainpool, str->data);
else
frb->rev->author = NULL;
if ((str = apr_hash_get(rev_props, SVN_PROP_REVISION_DATE,
sizeof(SVN_PROP_REVISION_DATE) - 1)))
frb->rev->date = apr_pstrdup(frb->mainpool, str->data);
else
frb->rev->date = NULL;
}
if (frb->include_merged_revisions)
frb->rev->path = apr_pstrdup(frb->mainpool, path);
return SVN_NO_ERROR;
}
/* (Note: *LAST_SEED is an output parameter.) */
static svn_error_t *
do_random_combine_test(const char **msg,
svn_boolean_t msg_only,
apr_pool_t *pool,
apr_uint32_t *last_seed)
{
static char msg_buff[256];
apr_uint32_t seed, bytes_range, maxlen;
int i, iterations, dump_files, print_windows;
const char *random_bytes;
/* Initialize parameters and print out the seed in case we dump core
or something. */
init_params(&seed, &maxlen, &iterations, &dump_files, &print_windows,
&random_bytes, &bytes_range, pool);
sprintf(msg_buff,
"random combine delta test, seed = %lu", (unsigned long) seed);
*msg = msg_buff;
if (msg_only)
return SVN_NO_ERROR;
else
printf("SEED: %s\n", msg_buff);
for (i = 0; i < iterations; i++)
{
/* Generate source and target for the delta and its application. */
apr_uint32_t subseed_base = svn_test_rand((*last_seed = seed, &seed));
apr_file_t *source = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *middle = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *target = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *source_copy = copy_tempfile(source, pool);
apr_file_t *middle_copy = copy_tempfile(middle, pool);
apr_file_t *target_regen = open_tempfile(NULL, pool);
svn_txdelta_stream_t *txdelta_stream_A;
svn_txdelta_stream_t *txdelta_stream_B;
svn_txdelta_window_handler_t handler;
svn_stream_t *stream;
void *handler_baton;
/* Set up a four-stage pipeline: create two deltas, combine them
and convert the result to svndiff format, parse that back
into delta format, and apply it to a copy of the source file
to see if we get the same target back. */
apr_pool_t *delta_pool = svn_pool_create(pool);
/* Make stage 4: apply the text delta. */
svn_txdelta_apply(svn_stream_from_aprfile(source_copy, delta_pool),
svn_stream_from_aprfile(target_regen, delta_pool),
NULL, NULL, delta_pool, &handler, &handler_baton);
/* Make stage 3: reparse the text delta. */
stream = svn_txdelta_parse_svndiff(handler, handler_baton, TRUE,
delta_pool);
/* Make stage 2: encode the text delta in svndiff format. */
svn_txdelta_to_svndiff2(&handler, &handler_baton, stream, 1,
delta_pool);
/* Make stage 1: create the text deltas. */
svn_txdelta(&txdelta_stream_A,
svn_stream_from_aprfile(source, delta_pool),
svn_stream_from_aprfile(middle, delta_pool),
delta_pool);
svn_txdelta(&txdelta_stream_B,
svn_stream_from_aprfile(middle_copy, delta_pool),
svn_stream_from_aprfile(target, delta_pool),
delta_pool);
{
svn_txdelta_window_t *window_A;
svn_txdelta_window_t *window_B;
svn_txdelta_window_t *composite;
apr_pool_t *wpool = svn_pool_create(delta_pool);
do
{
SVN_ERR(svn_txdelta_next_window(&window_A, txdelta_stream_A,
wpool));
if (print_windows)
delta_window_print(window_A, "A ", stdout);
SVN_ERR(svn_txdelta_next_window(&window_B, txdelta_stream_B,
wpool));
if (print_windows)
delta_window_print(window_B, "B ", stdout);
if (!window_B)
break;
assert(window_A != NULL || window_B->src_ops == 0);
if (window_B->src_ops == 0)
{
composite = window_B;
composite->sview_len = 0;
}
else
composite = svn_txdelta_compose_windows(window_A, window_B,
wpool);
if (print_windows)
delta_window_print(composite, "AB", stdout);
/* The source view length should not be 0 if there are
source copy ops in the window. */
if (composite
&& composite->sview_len == 0 && composite->src_ops > 0)
return svn_error_create
(SVN_ERR_FS_GENERAL, NULL,
"combined delta window is inconsistent");
SVN_ERR(handler(composite, handler_baton));
svn_pool_clear(wpool);
}
while (composite != NULL);
svn_pool_destroy(wpool);
}
svn_pool_destroy(delta_pool);
SVN_ERR(compare_files(target, target_regen, dump_files));
apr_file_close(source);
apr_file_close(middle);
apr_file_close(target);
apr_file_close(source_copy);
apr_file_close(middle_copy);
apr_file_close(target_regen);
}
return SVN_NO_ERROR;
}
/* Implements svn_test_driver_t. */
static svn_error_t *
random_test(const char **msg,
svn_boolean_t msg_only,
svn_test_opts_t *opts,
apr_pool_t *pool)
{
static char msg_buff[256];
apr_uint32_t seed, bytes_range, maxlen;
int i, iterations, dump_files, print_windows;
const char *random_bytes;
/* Initialize parameters and print out the seed in case we dump core
or something. */
init_params(&seed, &maxlen, &iterations, &dump_files, &print_windows,
&random_bytes, &bytes_range, pool);
sprintf(msg_buff, "random delta test, seed = %lu", (unsigned long) seed);
*msg = msg_buff;
if (msg_only)
return SVN_NO_ERROR;
else
printf("SEED: %s\n", msg_buff);
for (i = 0; i < iterations; i++)
{
/* Generate source and target for the delta and its application. */
apr_uint32_t subseed_base = svn_test_rand(&seed);
apr_file_t *source = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *target = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *source_copy = copy_tempfile(source, pool);
apr_file_t *target_regen = open_tempfile(NULL, pool);
svn_txdelta_stream_t *txdelta_stream;
svn_txdelta_window_handler_t handler;
svn_stream_t *stream;
void *handler_baton;
/* Set up a four-stage pipeline: create a delta, convert it to
svndiff format, parse it back into delta format, and apply it
to a copy of the source file to see if we get the same target
back. */
apr_pool_t *delta_pool = svn_pool_create(pool);
/* Make stage 4: apply the text delta. */
svn_txdelta_apply(svn_stream_from_aprfile(source_copy, delta_pool),
svn_stream_from_aprfile(target_regen, delta_pool),
NULL, NULL, delta_pool, &handler, &handler_baton);
/* Make stage 3: reparse the text delta. */
stream = svn_txdelta_parse_svndiff(handler, handler_baton, TRUE,
delta_pool);
/* Make stage 2: encode the text delta in svndiff format. */
svn_txdelta_to_svndiff2(&handler, &handler_baton, stream, 1,
delta_pool);
/* Make stage 1: create the text delta. */
svn_txdelta(&txdelta_stream,
svn_stream_from_aprfile(source, delta_pool),
svn_stream_from_aprfile(target, delta_pool),
delta_pool);
SVN_ERR(svn_txdelta_send_txstream(txdelta_stream,
handler,
handler_baton,
delta_pool));
svn_pool_destroy(delta_pool);
SVN_ERR(compare_files(target, target_regen, dump_files));
apr_file_close(source);
apr_file_close(target);
apr_file_close(source_copy);
apr_file_close(target_regen);
}
return SVN_NO_ERROR;
}
/* Implements svn_test_driver_t. */
static svn_error_t *
random_test(apr_pool_t *pool)
{
apr_uint32_t seed, maxlen;
apr_size_t bytes_range;
int i, iterations, dump_files, print_windows;
const char *random_bytes;
/* Initialize parameters and print out the seed in case we dump core
or something. */
init_params(&seed, &maxlen, &iterations, &dump_files, &print_windows,
&random_bytes, &bytes_range, pool);
for (i = 0; i < iterations; i++)
{
/* Generate source and target for the delta and its application. */
apr_uint32_t subseed_base = svn_test_rand(&seed);
apr_file_t *source = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *target = generate_random_file(maxlen, subseed_base, &seed,
random_bytes, bytes_range,
dump_files, pool);
apr_file_t *source_copy = copy_tempfile(source, pool);
apr_file_t *target_regen = open_tempfile(NULL, pool);
svn_txdelta_stream_t *txdelta_stream;
svn_txdelta_window_handler_t handler;
svn_stream_t *stream;
void *handler_baton;
/* Set up a four-stage pipeline: create a delta, convert it to
svndiff format, parse it back into delta format, and apply it
to a copy of the source file to see if we get the same target
back. */
apr_pool_t *delta_pool = svn_pool_create(pool);
/* Make stage 4: apply the text delta. */
svn_txdelta_apply(svn_stream_from_aprfile(source_copy, delta_pool),
svn_stream_from_aprfile(target_regen, delta_pool),
NULL, NULL, delta_pool, &handler, &handler_baton);
/* Make stage 3: reparse the text delta. */
stream = svn_txdelta_parse_svndiff(handler, handler_baton, TRUE,
delta_pool);
/* Make stage 2: encode the text delta in svndiff format using
varying compression levels. */
svn_txdelta_to_svndiff3(&handler, &handler_baton, stream, 1, i % 10,
delta_pool);
/* Make stage 1: create the text delta. */
svn_txdelta2(&txdelta_stream,
svn_stream_from_aprfile(source, delta_pool),
svn_stream_from_aprfile(target, delta_pool),
FALSE,
delta_pool);
SVN_ERR(svn_txdelta_send_txstream(txdelta_stream,
handler,
handler_baton,
delta_pool));
svn_pool_destroy(delta_pool);
SVN_ERR(compare_files(target, target_regen, dump_files));
apr_file_close(source);
apr_file_close(target);
apr_file_close(source_copy);
apr_file_close(target_regen);
}
return SVN_NO_ERROR;
}
/* An svn_delta_editor_t function. */
static svn_error_t *
apply_textdelta(void *file_baton,
const char *base_md5_digest,
apr_pool_t *pool,
svn_txdelta_window_handler_t *handler,
void **handler_baton)
{
struct file_baton *b = file_baton;
svn_stream_t *src_stream;
svn_stream_t *result_stream;
apr_pool_t *scratch_pool = b->pool;
/* Skip *everything* within a newly tree-conflicted directory. */
if (b->skip)
{
*handler = svn_delta_noop_window_handler;
*handler_baton = NULL;
return SVN_NO_ERROR;
}
/* If we're not sending file text, then ignore any that we receive. */
if (! b->edit_baton->text_deltas)
{
/* Supply valid paths to indicate there is a text change. */
SVN_ERR(get_empty_file(b->edit_baton, &b->path_start_revision));
SVN_ERR(get_empty_file(b->edit_baton, &b->path_end_revision));
*handler = svn_delta_noop_window_handler;
*handler_baton = NULL;
return SVN_NO_ERROR;
}
/* We need the expected pristine file, so go get it */
if (!b->added)
SVN_ERR(get_file_from_ra(b, FALSE, scratch_pool));
else
SVN_ERR(get_empty_file(b->edit_baton, &(b->path_start_revision)));
SVN_ERR_ASSERT(b->path_start_revision != NULL);
if (base_md5_digest != NULL)
{
svn_checksum_t *base_md5_checksum;
SVN_ERR(svn_checksum_parse_hex(&base_md5_checksum, svn_checksum_md5,
base_md5_digest, scratch_pool));
if (!svn_checksum_match(base_md5_checksum, b->start_md5_checksum))
return svn_error_trace(svn_checksum_mismatch_err(
base_md5_checksum,
b->start_md5_checksum,
scratch_pool,
_("Base checksum mismatch for '%s'"),
b->path));
}
/* Open the file to be used as the base for second revision */
SVN_ERR(svn_stream_open_readonly(&src_stream, b->path_start_revision,
scratch_pool, scratch_pool));
/* Open the file that will become the second revision after applying the
text delta, it starts empty */
SVN_ERR(svn_stream_open_unique(&result_stream, &b->path_end_revision, NULL,
svn_io_file_del_on_pool_cleanup,
scratch_pool, scratch_pool));
svn_txdelta_apply(src_stream,
result_stream,
b->result_digest,
b->path, b->pool,
&(b->apply_handler), &(b->apply_baton));
*handler = window_handler;
*handler_baton = file_baton;
return SVN_NO_ERROR;
}