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;
}
/* Conforms to svn_ra_serf__xml_opened_t */
static svn_error_t *
blame_opened(svn_ra_serf__xml_estate_t *xes,
void *baton,
int entered_state,
const svn_ra_serf__dav_props_t *tag,
apr_pool_t *scratch_pool)
{
blame_context_t *blame_ctx = baton;
if (entered_state == FILE_REV)
{
apr_pool_t *state_pool = svn_ra_serf__xml_state_pool(xes);
/* Child elements will store properties in these structures. */
blame_ctx->rev_props = apr_hash_make(state_pool);
blame_ctx->prop_diffs = apr_array_make(state_pool,
5, sizeof(svn_prop_t));
blame_ctx->state_pool = state_pool;
/* Clear this, so we can detect the absence of a TXDELTA. */
blame_ctx->stream = NULL;
}
else if (entered_state == TXDELTA)
{
apr_pool_t *state_pool = svn_ra_serf__xml_state_pool(xes);
apr_hash_t *gathered = svn_ra_serf__xml_gather_since(xes, FILE_REV);
const char *path;
const char *rev_str;
const char *merged_revision;
svn_txdelta_window_handler_t txdelta;
void *txdelta_baton;
apr_int64_t rev;
path = svn_hash_gets(gathered, "path");
rev_str = svn_hash_gets(gathered, "rev");
SVN_ERR(svn_cstring_atoi64(&rev, rev_str));
merged_revision = svn_hash_gets(gathered, "merged-revision");
SVN_ERR(blame_ctx->file_rev(blame_ctx->file_rev_baton,
path, (svn_revnum_t)rev,
blame_ctx->rev_props,
merged_revision != NULL,
&txdelta, &txdelta_baton,
blame_ctx->prop_diffs,
state_pool));
blame_ctx->stream = svn_base64_decode(svn_txdelta_parse_svndiff(
txdelta, txdelta_baton,
TRUE /* error_on_early_close */,
state_pool),
state_pool);
}
return SVN_NO_ERROR;
}
static svn_error_t *ra_svn_handle_apply_textdelta(svn_ra_svn_conn_t *conn,
apr_pool_t *pool,
const apr_array_header_t *params,
ra_svn_driver_state_t *ds)
{
const char *token;
ra_svn_token_entry_t *entry;
svn_txdelta_window_handler_t wh;
void *wh_baton;
char *base_checksum;
/* Parse arguments and look up the token. */
SVN_ERR(svn_ra_svn__parse_tuple(params, pool, "c(?c)",
&token, &base_checksum));
SVN_ERR(lookup_token(ds, token, TRUE, &entry));
if (entry->dstream)
return svn_error_create(SVN_ERR_RA_SVN_MALFORMED_DATA, NULL,
_("Apply-textdelta already active"));
entry->pool = svn_pool_create(ds->file_pool);
SVN_CMD_ERR(ds->editor->apply_textdelta(entry->baton, base_checksum,
entry->pool, &wh, &wh_baton));
entry->dstream = svn_txdelta_parse_svndiff(wh, wh_baton, TRUE, entry->pool);
return SVN_NO_ERROR;
}
/* Read CONTENT_LENGTH bytes from STREAM, and use
PARSE_FNS->set_fulltext to push those bytes as replace fulltext for
a node. Use BUFFER/BUFLEN to push the fulltext in "chunks".
Use POOL for all allocations. */
static svn_error_t *
parse_text_block(svn_stream_t *stream,
svn_filesize_t content_length,
svn_boolean_t is_delta,
const svn_repos_parse_fns3_t *parse_fns,
void *record_baton,
char *buffer,
apr_size_t buflen,
apr_pool_t *pool)
{
svn_stream_t *text_stream = NULL;
apr_size_t num_to_read, rlen, wlen;
if (is_delta)
{
svn_txdelta_window_handler_t wh;
void *whb;
SVN_ERR(parse_fns->apply_textdelta(&wh, &whb, record_baton));
if (wh)
text_stream = svn_txdelta_parse_svndiff(wh, whb, TRUE, pool);
}
else
{
/* Get a stream to which we can push the data. */
SVN_ERR(parse_fns->set_fulltext(&text_stream, record_baton));
}
/* If there are no contents to read, just write an empty buffer
through our callback. */
if (content_length == 0)
{
wlen = 0;
if (text_stream)
SVN_ERR(svn_stream_write(text_stream, "", &wlen));
}
/* Regardless of whether or not we have a sink for our data, we
need to read it. */
while (content_length)
{
if (content_length >= (svn_filesize_t)buflen)
rlen = buflen;
else
rlen = (apr_size_t) content_length;
num_to_read = rlen;
SVN_ERR(svn_stream_read(stream, buffer, &rlen));
content_length -= rlen;
if (rlen != num_to_read)
return stream_ran_dry();
if (text_stream)
{
/* write however many bytes you read. */
wlen = rlen;
SVN_ERR(svn_stream_write(text_stream, buffer, &wlen));
if (wlen != rlen)
{
/* Uh oh, didn't write as many bytes as we read. */
return svn_error_create(SVN_ERR_STREAM_UNEXPECTED_EOF, NULL,
_("Unexpected EOF writing contents"));
}
}
}
/* If we opened a stream, we must close it. */
if (text_stream)
SVN_ERR(svn_stream_close(text_stream));
return SVN_NO_ERROR;
}
static svn_error_t *
start_element(int *elem, void *baton, int parent_state, const char *nspace,
const char *elt_name, const char **atts)
{
replay_baton_t *rb = baton;
const svn_ra_neon__xml_elm_t *elm
= svn_ra_neon__lookup_xml_elem(editor_report_elements, nspace, elt_name);
if (! elm)
{
*elem = NE_XML_DECLINE;
return SVN_NO_ERROR;
}
if (parent_state == ELEM_root)
{
/* If we're at the root of the tree, the element has to be the editor
* report itself. */
if (elm->id != ELEM_editor_report)
return UNEXPECTED_ELEMENT(nspace, elt_name);
}
else if (parent_state != ELEM_editor_report)
{
/* If we're not at the root, our parent has to be the editor report,
* since we don't actually nest any elements. */
return UNEXPECTED_ELEMENT(nspace, elt_name);
}
switch (elm->id)
{
case ELEM_target_revision:
{
const char *crev = svn_xml_get_attr_value("rev", atts);
if (! crev)
return MISSING_ATTR(nspace, elt_name, "rev");
else
return rb->editor->set_target_revision(rb->edit_baton,
SVN_STR_TO_REV(crev),
rb->pool);
}
break;
case ELEM_open_root:
{
const char *crev = svn_xml_get_attr_value("rev", atts);
if (! crev)
return MISSING_ATTR(nspace, elt_name, "rev");
else
{
apr_pool_t *subpool = svn_pool_create(rb->pool);
void *dir_baton;
SVN_ERR(rb->editor->open_root(rb->edit_baton,
SVN_STR_TO_REV(crev), subpool,
&dir_baton));
push_dir(rb, dir_baton, "", subpool);
}
}
break;
case ELEM_delete_entry:
{
const char *path = svn_xml_get_attr_value("name", atts);
const char *crev = svn_xml_get_attr_value("rev", atts);
if (! path)
return MISSING_ATTR(nspace, elt_name, "name");
else if (! crev)
return MISSING_ATTR(nspace, elt_name, "rev");
else
{
dir_item_t *di = &TOP_DIR(rb);
SVN_ERR(rb->editor->delete_entry(path, SVN_STR_TO_REV(crev),
di->baton, di->pool));
}
}
break;
case ELEM_open_directory:
case ELEM_add_directory:
{
const char *crev = svn_xml_get_attr_value("rev", atts);
const char *name = svn_xml_get_attr_value("name", atts);
if (! name)
return MISSING_ATTR(nspace, elt_name, "name");
else
{
dir_item_t *parent = &TOP_DIR(rb);
apr_pool_t *subpool = svn_pool_create(parent->pool);
svn_revnum_t rev;
void *dir_baton;
if (crev)
rev = SVN_STR_TO_REV(crev);
else
rev = SVN_INVALID_REVNUM;
if (elm->id == ELEM_open_directory)
SVN_ERR(rb->editor->open_directory(name, parent->baton,
rev, subpool, &dir_baton));
else if (elm->id == ELEM_add_directory)
{
const char *cpath = svn_xml_get_attr_value("copyfrom-path",
atts);
crev = svn_xml_get_attr_value("copyfrom-rev", atts);
if (crev)
rev = SVN_STR_TO_REV(crev);
else
rev = SVN_INVALID_REVNUM;
SVN_ERR(rb->editor->add_directory(name, parent->baton,
cpath, rev, subpool,
&dir_baton));
}
else
SVN_ERR_MALFUNCTION();
push_dir(rb, dir_baton, name, subpool);
}
}
break;
case ELEM_open_file:
case ELEM_add_file:
{
const char *path = svn_xml_get_attr_value("name", atts);
svn_revnum_t rev;
dir_item_t *parent = &TOP_DIR(rb);
if (! path)
return MISSING_ATTR(nspace, elt_name, "name");
svn_pool_clear(parent->file_pool);
if (elm->id == ELEM_add_file)
{
const char *cpath = svn_xml_get_attr_value("copyfrom-path", atts);
const char *crev = svn_xml_get_attr_value("copyfrom-rev", atts);
if (crev)
rev = SVN_STR_TO_REV(crev);
else
rev = SVN_INVALID_REVNUM;
SVN_ERR(rb->editor->add_file(path, parent->baton, cpath, rev,
parent->file_pool, &rb->file_baton));
}
else
{
const char *crev = svn_xml_get_attr_value("rev", atts);
if (crev)
rev = SVN_STR_TO_REV(crev);
else
rev = SVN_INVALID_REVNUM;
SVN_ERR(rb->editor->open_file(path, parent->baton, rev,
parent->file_pool,
&rb->file_baton));
}
}
break;
case ELEM_apply_textdelta:
if (! rb->file_baton)
return svn_error_create
(SVN_ERR_RA_DAV_MALFORMED_DATA, NULL,
_("Got apply-textdelta element without preceding "
"add-file or open-file"));
else
{
const char *checksum = svn_xml_get_attr_value("checksum", atts);
SVN_ERR(rb->editor->apply_textdelta(rb->file_baton,
checksum,
TOP_DIR(rb).file_pool,
&rb->whandler,
&rb->whandler_baton));
rb->svndiff_decoder = svn_txdelta_parse_svndiff
(rb->whandler, rb->whandler_baton,
TRUE, TOP_DIR(rb).file_pool);
rb->base64_decoder = svn_base64_decode(rb->svndiff_decoder,
TOP_DIR(rb).file_pool);
}
break;
case ELEM_close_file:
if (! rb->file_baton)
return svn_error_create
(SVN_ERR_RA_DAV_MALFORMED_DATA, NULL,
_("Got close-file element without preceding "
"add-file or open-file"));
else
{
const char *checksum = svn_xml_get_attr_value("checksum", atts);
SVN_ERR(rb->editor->close_file(rb->file_baton,
checksum,
TOP_DIR(rb).file_pool));
rb->file_baton = NULL;
}
break;
case ELEM_close_directory:
if (rb->dirs->nelts == 0)
return svn_error_create
(SVN_ERR_RA_DAV_MALFORMED_DATA, NULL,
_("Got close-directory element without ever opening "
"a directory"));
else
{
dir_item_t *di = &TOP_DIR(rb);
SVN_ERR(rb->editor->close_directory(di->baton, di->pool));
svn_pool_destroy(di->pool);
apr_array_pop(rb->dirs);
}
break;
case ELEM_change_file_prop:
case ELEM_change_dir_prop:
{
const char *name = svn_xml_get_attr_value("name", atts);
if (! name)
return MISSING_ATTR(nspace, elt_name, "name");
else
{
svn_pool_clear(rb->prop_pool);
if (svn_xml_get_attr_value("del", atts))
rb->prop_accum = NULL;
else
rb->prop_accum = svn_stringbuf_create("", rb->prop_pool);
rb->prop_name = apr_pstrdup(rb->prop_pool, name);
}
}
break;
}
*elem = elm->id;
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;
}
