/* Compute the delta between OLDROOT/OLDPATH and NEWROOT/NEWPATH and
store it into a new temporary file *TEMPFILE. OLDROOT may be NULL,
in which case the delta will be computed against an empty file, as
per the svn_fs_get_file_delta_stream docstring. Record the length
of the temporary file in *LEN, and rewind the file before
returning. */
static svn_error_t *
store_delta(apr_file_t **tempfile, svn_filesize_t *len,
svn_fs_root_t *oldroot, const char *oldpath,
svn_fs_root_t *newroot, const char *newpath, apr_pool_t *pool)
{
svn_stream_t *temp_stream;
apr_off_t offset = 0;
svn_txdelta_stream_t *delta_stream;
svn_txdelta_window_handler_t wh;
void *whb;
/* Create a temporary file and open a stream to it. Note that we need
the file handle in order to rewind it. */
SVN_ERR(svn_io_open_unique_file3(tempfile, NULL, NULL,
svn_io_file_del_on_pool_cleanup,
pool, pool));
temp_stream = svn_stream_from_aprfile2(*tempfile, TRUE, pool);
/* Compute the delta and send it to the temporary file. */
SVN_ERR(svn_fs_get_file_delta_stream(&delta_stream, oldroot, oldpath,
newroot, newpath, pool));
svn_txdelta_to_svndiff2(&wh, &whb, temp_stream, 0, pool);
SVN_ERR(svn_txdelta_send_txstream(delta_stream, wh, whb, pool));
/* Get the length of the temporary file and rewind it. */
SVN_ERR(svn_io_file_seek(*tempfile, APR_CUR, &offset, pool));
*len = offset;
offset = 0;
return svn_io_file_seek(*tempfile, APR_SET, &offset, pool);
}
/* Deltifies a node, i.e. generates a svndiff that can be dumped */
static svn_error_t *delta_deltify_node(de_node_baton_t *node)
{
svn_txdelta_stream_t *stream;
svn_txdelta_window_handler_t handler;
void *handler_baton;
svn_stream_t *source, *target, *dest;
apr_file_t *source_file = NULL, *target_file = NULL, *dest_file = NULL;
dump_options_t *opts = node->de_baton->opts;
apr_pool_t *pool = svn_pool_create(node->pool);
svn_error_t *err;
DEBUG_MSG("delta_deltify_node(%s): %s -> %s\n", node->path, node->old_filename, node->filename);
/* Open source and target */
apr_file_open(&target_file, node->filename, APR_READ, 0600, pool);
target = svn_stream_from_aprfile2(target_file, FALSE, pool);
if (node->old_filename) {
apr_file_open(&source_file, node->old_filename, APR_READ, 0600, pool);
source = svn_stream_from_aprfile2(source_file, FALSE, pool);
} else {
source = svn_stream_empty(pool);
}
/* Open temporary output file */
node->delta_filename = apr_psprintf(node->pool, "%s/XXXXXX", opts->temp_dir);
apr_file_mktemp(&dest_file, node->delta_filename, APR_CREATE | APR_READ | APR_WRITE | APR_EXCL, pool);
dest = svn_stream_from_aprfile2(dest_file, FALSE, pool);
DEBUG_MSG("delta_deltify_node(%s): writing to %s\n", node->path, node->delta_filename);
/* Produce delta in svndiff format */
svn_txdelta(&stream, source, target, pool);
svn_txdelta_to_svndiff2(&handler, &handler_baton, dest, 0, pool);
err = svn_txdelta_send_txstream(stream, handler, handler_baton, pool);
svn_pool_destroy(pool);
return err;
}
inline Try<Diff> diff(const std::string& from, const std::string& to)
{
// 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);
// First we need to produce a text delta stream by diffing 'source'
// against 'target'.
svn_string_t source;
source.data = from.data();
source.len = from.length();
svn_string_t target;
target.data = to.data();
target.len = to.length();
svn_txdelta_stream_t* delta;
#if SVN_VER_MAJOR >= 1 && SVN_VER_MINOR >= 8
svn_txdelta2(
&delta,
svn_stream_from_string(&source, pool),
svn_stream_from_string(&target, pool),
false,
pool);
#else
svn_txdelta(
&delta,
svn_stream_from_string(&source, pool),
svn_stream_from_string(&target, pool),
pool);
#endif
// Now we want to convert this text delta stream into an svndiff
// format based diff. Setup the handler that will consume the text
// delta and produce the svndiff.
svn_txdelta_window_handler_t handler;
void* baton = NULL;
svn_stringbuf_t* diff = svn_stringbuf_create_ensure(1024, pool);
#if SVN_VER_MAJOR >= 1 && SVN_VER_MINOR >= 7
svn_txdelta_to_svndiff3(
&handler,
&baton,
svn_stream_from_stringbuf(diff, pool),
0,
SVN_DELTA_COMPRESSION_LEVEL_DEFAULT,
pool);
#elif SVN_VER_MAJOR >= 1 && SVN_VER_MINOR >= 4
svn_txdelta_to_svndiff2(
&handler,
&baton,
svn_stream_from_stringbuf(diff, pool),
0,
pool);
#else
svn_txdelta_to_svndiff(
svn_stream_from_stringbuf(diff, pool),
pool,
&handler,
&baton);
#endif
// Now feed the text delta to the handler.
svn_error_t* error = svn_txdelta_send_txstream(delta, handler, baton, pool);
if (error != NULL) {
char buffer[1024];
std::string message(svn_err_best_message(error, buffer, 1024));
svn_pool_destroy(pool);
return Error(message);
}
Diff d(std::string(diff->data, diff->len));
svn_pool_destroy(pool);
return d;
}
/* (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;
}
