Adding upstream version 1.4.3+ds.upstream/1.4.3+dsupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 2146 insertions, 0 deletions

diff --git a/src/test_libFLAC/metadata_manip.c b/src/test_libFLAC/metadata_manip.c
new file mode 100644
index 0000000..334dc3a
--- /dev/null
+++ b/src/test_libFLAC/metadata_manip.c
@@ -0,0 +1,2146 @@
+/* test_libFLAC - Unit tester for libFLAC
+ * Copyright (C) 2002-2009  Josh Coalson
+ * Copyright (C) 2011-2023  Xiph.Org Foundation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include <config.h>
+#endif
+
+#include <stdio.h>
+#include <stdlib.h> /* for malloc() */
+#include <string.h> /* for memcpy()/memset() */
+#if defined _MSC_VER || defined __MINGW32__
+#include <sys/utime.h> /* for utime() */
+#include <io.h> /* for chmod() */
+#else
+#include <sys/types.h> /* some flavors of BSD (like OS X) require this to get time_t */
+#include <unistd.h> /* for chown(), unlink() */
+#endif
+#include <sys/stat.h> /* for stat(), maybe chmod() */
+#include "FLAC/assert.h"
+#include "FLAC/stream_decoder.h"
+#include "FLAC/metadata.h"
+#include "share/grabbag.h"
+#include "share/compat.h"
+#include "share/macros.h"
+#include "share/safe_str.h"
+#include "test_libs_common/file_utils_flac.h"
+#include "test_libs_common/metadata_utils.h"
+#include "metadata.h"
+
+
+/******************************************************************************
+	The general strategy of these tests (for interface levels 1 and 2) is
+	to create a dummy FLAC file with a known set of initial metadata
+	blocks, then keep a mirror locally of what we expect the metadata to be
+	after each operation.  Then testing becomes a simple matter of running
+	a FLAC__StreamDecoder over the dummy file after each operation, comparing
+	the decoded metadata to what's in our local copy.  If there are any
+	differences in the metadata, or the actual audio data is corrupted, we
+	will catch it while decoding.
+******************************************************************************/
+
+typedef struct {
+	FLAC__bool error_occurred;
+} decoder_client_struct;
+
+typedef struct {
+	FLAC__StreamMetadata *blocks[64];
+	uint32_t num_blocks;
+} our_metadata_struct;
+
+/* our copy of the metadata in flacfilename() */
+static our_metadata_struct our_metadata_;
+
+/* the current block number that corresponds to the position of the iterator we are testing */
+static uint32_t mc_our_block_number_ = 0;
+
+static const char *flacfilename(FLAC__bool is_ogg)
+{
+	return is_ogg? "metadata.oga" : "metadata.flac";
+}
+
+static FLAC__bool die_(const char *msg)
+{
+	printf("ERROR: %s\n", msg);
+	return false;
+}
+
+static FLAC__bool die_c_(const char *msg, FLAC__Metadata_ChainStatus status)
+{
+	printf("ERROR: %s\n", msg);
+	printf("       status=%s\n", FLAC__Metadata_ChainStatusString[status]);
+	return false;
+}
+
+static FLAC__bool die_ss_(const char *msg, FLAC__Metadata_SimpleIterator *iterator)
+{
+	printf("ERROR: %s\n", msg);
+	printf("       status=%s\n", FLAC__Metadata_SimpleIteratorStatusString[FLAC__metadata_simple_iterator_status(iterator)]);
+	return false;
+}
+
+static void *malloc_or_die_(size_t size)
+{
+	void *x = malloc(size);
+	if(0 == x) {
+		fprintf(stderr, "ERROR: out of memory allocating %u bytes\n", (uint32_t)size);
+		exit(1);
+	}
+	return x;
+}
+
+static char *strdup_or_die_(const char *s)
+{
+	char *x = strdup(s);
+	if(0 == x) {
+		fprintf(stderr, "ERROR: out of memory copying string \"%s\"\n", s);
+		exit(1);
+	}
+	return x;
+}
+
+/* functions for working with our metadata copy */
+
+static FLAC__bool replace_in_our_metadata_(FLAC__StreamMetadata *block, uint32_t position, FLAC__bool copy)
+{
+	uint32_t i;
+	FLAC__StreamMetadata *obj = block;
+	FLAC__ASSERT(position < our_metadata_.num_blocks);
+	if(copy) {
+		if(0 == (obj = FLAC__metadata_object_clone(block)))
+			return die_("during FLAC__metadata_object_clone()");
+	}
+	FLAC__metadata_object_delete(our_metadata_.blocks[position]);
+	our_metadata_.blocks[position] = obj;
+
+	/* set the is_last flags */
+	for(i = 0; i < our_metadata_.num_blocks - 1; i++)
+		our_metadata_.blocks[i]->is_last = false;
+	our_metadata_.blocks[i]->is_last = true;
+
+	return true;
+}
+
+static FLAC__bool insert_to_our_metadata_(FLAC__StreamMetadata *block, uint32_t position, FLAC__bool copy)
+{
+	uint32_t i;
+	FLAC__StreamMetadata *obj = block;
+	if(copy) {
+		if(0 == (obj = FLAC__metadata_object_clone(block)))
+			return die_("during FLAC__metadata_object_clone()");
+	}
+	if(position > our_metadata_.num_blocks) {
+		position = our_metadata_.num_blocks;
+	}
+	else {
+		for(i = our_metadata_.num_blocks; i > position; i--)
+			our_metadata_.blocks[i] = our_metadata_.blocks[i-1];
+	}
+	our_metadata_.blocks[position] = obj;
+	our_metadata_.num_blocks++;
+
+	/* set the is_last flags */
+	for(i = 0; i < our_metadata_.num_blocks - 1; i++)
+		our_metadata_.blocks[i]->is_last = false;
+	our_metadata_.blocks[i]->is_last = true;
+
+	return true;
+}
+
+static void delete_from_our_metadata_(uint32_t position)
+{
+	uint32_t i;
+	FLAC__ASSERT(position < our_metadata_.num_blocks);
+	FLAC__metadata_object_delete(our_metadata_.blocks[position]);
+	for(i = position; i < our_metadata_.num_blocks - 1; i++)
+		our_metadata_.blocks[i] = our_metadata_.blocks[i+1];
+	our_metadata_.num_blocks--;
+
+	/* set the is_last flags */
+	if(our_metadata_.num_blocks > 0) {
+		for(i = 0; i < our_metadata_.num_blocks - 1; i++)
+			our_metadata_.blocks[i]->is_last = false;
+		our_metadata_.blocks[i]->is_last = true;
+	}
+}
+
+/*
+ * This wad of functions supports filename- and callback-based chain reading/writing.
+ * Everything up to set_file_stats_() is copied from libFLAC/metadata_iterators.c
+ */
+static FLAC__bool open_tempfile_(const char *filename, FILE **tempfile, char **tempfilename)
+{
+	static const char *tempfile_suffix = ".metadata_edit";
+	size_t dest_len = strlen(filename) + strlen(tempfile_suffix) + 1;
+
+	*tempfilename = malloc(dest_len);
+	if (*tempfilename == NULL)
+		return false;
+	safe_strncpy(*tempfilename, filename, dest_len);
+	safe_strncat(*tempfilename, tempfile_suffix, dest_len);
+
+	*tempfile = flac_fopen(*tempfilename, "wb");
+	if (*tempfile == NULL)
+		return false;
+
+	return true;
+}
+
+static void cleanup_tempfile_(FILE **tempfile, char **tempfilename)
+{
+	if (*tempfile != NULL) {
+		(void)fclose(*tempfile);
+		*tempfile = 0;
+	}
+
+	if (*tempfilename != NULL) {
+		(void)flac_unlink(*tempfilename);
+		free(*tempfilename);
+		*tempfilename = 0;
+	}
+}
+
+static FLAC__bool transport_tempfile_(const char *filename, FILE **tempfile, char **tempfilename)
+{
+	FLAC__ASSERT(0 != filename);
+	FLAC__ASSERT(0 != tempfile);
+	FLAC__ASSERT(0 != tempfilename);
+	FLAC__ASSERT(0 != *tempfilename);
+
+	if(0 != *tempfile) {
+		(void)fclose(*tempfile);
+		*tempfile = 0;
+	}
+
+#if defined _MSC_VER || defined __MINGW32__ || defined __EMX__
+	/* on some flavors of windows, flac_rename() will fail if the destination already exists */
+	if(flac_unlink(filename) < 0) {
+		cleanup_tempfile_(tempfile, tempfilename);
+		return false;
+	}
+#endif
+
+	if(0 != flac_rename(*tempfilename, filename)) {
+		cleanup_tempfile_(tempfile, tempfilename);
+		return false;
+	}
+
+	cleanup_tempfile_(tempfile, tempfilename);
+
+	return true;
+}
+
+static FLAC__bool get_file_stats_(const char *filename, struct flac_stat_s *stats)
+{
+	FLAC__ASSERT(0 != filename);
+	FLAC__ASSERT(0 != stats);
+	return (0 == flac_stat(filename, stats));
+}
+
+static void set_file_stats_(const char *filename, struct flac_stat_s *stats)
+{
+#if defined(_POSIX_C_SOURCE) && (_POSIX_C_SOURCE >= 200809L) && !defined(_WIN32)
+	struct timespec srctime[2] = {};
+	srctime[0].tv_sec = stats->st_atime;
+	srctime[1].tv_sec = stats->st_mtime;
+#else
+	struct utimbuf srctime;
+	srctime.actime = stats->st_atime;
+	srctime.modtime = stats->st_mtime;
+#endif
+	FLAC__ASSERT(0 != filename);
+	FLAC__ASSERT(0 != stats);
+
+	(void)flac_chmod(filename, stats->st_mode);
+	(void)flac_utime(filename, &srctime);
+#if !defined _MSC_VER && !defined __MINGW32__
+	FLAC_CHECK_RETURN(chown(filename, stats->st_uid, -1));
+	FLAC_CHECK_RETURN(chown(filename, -1, stats->st_gid));
+#endif
+}
+
+#ifdef FLAC__VALGRIND_TESTING
+static size_t chain_write_cb_(const void *ptr, size_t size, size_t nmemb, FLAC__IOHandle handle)
+{
+	FILE *stream = (FILE*)handle;
+	size_t ret = fwrite(ptr, size, nmemb, stream);
+	if(!ferror(stream))
+		fflush(stream);
+	return ret;
+}
+#endif
+
+static int chain_seek_cb_(FLAC__IOHandle handle, FLAC__int64 offset, int whence)
+{
+	FLAC__off_t o = (FLAC__off_t)offset;
+	FLAC__ASSERT(offset == o);
+	return fseeko((FILE*)handle, o, whence);
+}
+
+static FLAC__int64 chain_tell_cb_(FLAC__IOHandle handle)
+{
+	return ftello((FILE*)handle);
+}
+
+static int chain_eof_cb_(FLAC__IOHandle handle)
+{
+	return feof((FILE*)handle);
+}
+
+static FLAC__bool write_chain_(FLAC__Metadata_Chain *chain, FLAC__bool use_padding, FLAC__bool preserve_file_stats, FLAC__bool filename_based, const char *filename)
+{
+	if(filename_based)
+		return FLAC__metadata_chain_write(chain, use_padding, preserve_file_stats);
+	else {
+		FLAC__IOCallbacks callbacks;
+
+		memset(&callbacks, 0, sizeof(callbacks));
+		callbacks.read = (FLAC__IOCallback_Read)fread;
+#ifdef FLAC__VALGRIND_TESTING
+		callbacks.write = chain_write_cb_;
+#else
+		callbacks.write = (FLAC__IOCallback_Write)fwrite;
+#endif
+		callbacks.seek = chain_seek_cb_;
+		callbacks.eof = chain_eof_cb_;
+
+		if(FLAC__metadata_chain_check_if_tempfile_needed(chain, use_padding)) {
+			struct flac_stat_s stats;
+			FILE *file, *tempfile = 0;
+			char *tempfilename;
+			if(preserve_file_stats) {
+				if(!get_file_stats_(filename, &stats))
+					return false;
+			}
+			if(0 == (file = flac_fopen(filename, "rb")))
+				return false; /*@@@@ chain status still says OK though */
+			if(!open_tempfile_(filename, &tempfile, &tempfilename)) {
+				fclose(file);
+				cleanup_tempfile_(&tempfile, &tempfilename);
+				return false; /*@@@@ chain status still says OK though */
+			}
+			if(!FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain, use_padding, (FLAC__IOHandle)file, callbacks, (FLAC__IOHandle)tempfile, callbacks)) {
+				fclose(file);
+				fclose(tempfile);
+				return false;
+			}
+			fclose(file);
+			fclose(tempfile);
+			file = tempfile = 0;
+			if(!transport_tempfile_(filename, &tempfile, &tempfilename))
+				return false;
+			if(preserve_file_stats)
+				set_file_stats_(filename, &stats);
+		}
+		else {
+			FILE *file = flac_fopen(filename, "r+b");
+			if(0 == file)
+				return false; /*@@@@ chain status still says OK though */
+			if(!FLAC__metadata_chain_write_with_callbacks(chain, use_padding, (FLAC__IOHandle)file, callbacks))
+				return false;
+			fclose(file);
+		}
+	}
+
+	return true;
+}
+
+static FLAC__bool read_chain_(FLAC__Metadata_Chain *chain, const char *filename, FLAC__bool filename_based, FLAC__bool is_ogg)
+{
+	if(filename_based)
+		return is_ogg?
+			FLAC__metadata_chain_read_ogg(chain, flacfilename(is_ogg)) :
+			FLAC__metadata_chain_read(chain, flacfilename(is_ogg))
+		;
+	else {
+		FLAC__IOCallbacks callbacks;
+
+		memset(&callbacks, 0, sizeof(callbacks));
+		callbacks.read = (FLAC__IOCallback_Read)fread;
+		callbacks.seek = chain_seek_cb_;
+		callbacks.tell = chain_tell_cb_;
+
+		{
+			FLAC__bool ret;
+			FILE *file = flac_fopen(filename, "rb");
+			if(0 == file)
+				return false; /*@@@@ chain status still says OK though */
+			ret = is_ogg?
+				FLAC__metadata_chain_read_ogg_with_callbacks(chain, (FLAC__IOHandle)file, callbacks) :
+				FLAC__metadata_chain_read_with_callbacks(chain, (FLAC__IOHandle)file, callbacks)
+			;
+			fclose(file);
+			return ret;
+		}
+	}
+}
+
+/* function for comparing our metadata to a FLAC__Metadata_Chain */
+
+static FLAC__bool compare_chain_(FLAC__Metadata_Chain *chain, uint32_t current_position, FLAC__StreamMetadata *current_block)
+{
+	uint32_t i;
+	FLAC__Metadata_Iterator *iterator;
+	FLAC__StreamMetadata *block;
+	FLAC__bool next_ok = true;
+
+	FLAC__ASSERT(0 != chain);
+
+	printf("\tcomparing chain... ");
+	fflush(stdout);
+
+	if(0 == (iterator = FLAC__metadata_iterator_new()))
+		return die_("allocating memory for iterator");
+
+	FLAC__metadata_iterator_init(iterator, chain);
+
+	i = 0;
+	do {
+		printf("%u... ", i);
+		fflush(stdout);
+
+		if(0 == (block = FLAC__metadata_iterator_get_block(iterator))) {
+			FLAC__metadata_iterator_delete(iterator);
+			return die_("getting block from iterator");
+		}
+
+		if(!mutils__compare_block(our_metadata_.blocks[i], block)) {
+			FLAC__metadata_iterator_delete(iterator);
+			return die_("metadata block mismatch");
+		}
+
+		i++;
+		next_ok = FLAC__metadata_iterator_next(iterator);
+	} while(i < our_metadata_.num_blocks && next_ok);
+
+	FLAC__metadata_iterator_delete(iterator);
+
+	if(next_ok)
+		return die_("chain has more blocks than expected");
+
+	if(i < our_metadata_.num_blocks)
+		return die_("short block count in chain");
+
+	if(0 != current_block) {
+		printf("CURRENT_POSITION... ");
+		fflush(stdout);
+
+		if(!mutils__compare_block(our_metadata_.blocks[current_position], current_block))
+			return die_("metadata block mismatch");
+	}
+
+	printf("PASSED\n");
+
+	return true;
+}
+
+/* decoder callbacks for checking the file */
+
+static FLAC__StreamDecoderWriteStatus decoder_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data)
+{
+	(void)decoder, (void)buffer, (void)client_data;
+
+	if(
+		(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER && frame->header.number.frame_number == 0) ||
+		(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER && frame->header.number.sample_number == 0)
+	) {
+		printf("content... ");
+		fflush(stdout);
+	}
+
+	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+}
+
+/* this version pays no attention to the metadata */
+static void decoder_metadata_callback_null_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
+{
+	(void)decoder, (void)metadata, (void)client_data;
+
+	printf("%u... ", mc_our_block_number_);
+	fflush(stdout);
+
+	mc_our_block_number_++;
+}
+
+/* this version is used when we want to compare to our metadata copy */
+static void decoder_metadata_callback_compare_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data)
+{
+	decoder_client_struct *dcd = (decoder_client_struct*)client_data;
+
+	(void)decoder;
+
+	/* don't bother checking if we've already hit an error */
+	if(dcd->error_occurred)
+		return;
+
+	printf("%u... ", mc_our_block_number_);
+	fflush(stdout);
+
+	if(mc_our_block_number_ >= our_metadata_.num_blocks) {
+		(void)die_("got more metadata blocks than expected");
+		dcd->error_occurred = true;
+	}
+	else {
+		if(!mutils__compare_block(our_metadata_.blocks[mc_our_block_number_], metadata)) {
+			(void)die_("metadata block mismatch");
+			dcd->error_occurred = true;
+		}
+	}
+	mc_our_block_number_++;
+}
+
+static void decoder_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
+{
+	decoder_client_struct *dcd = (decoder_client_struct*)client_data;
+	(void)decoder;
+
+	dcd->error_occurred = true;
+	printf("ERROR: got error callback, status = %s (%u)\n", FLAC__StreamDecoderErrorStatusString[status], (uint32_t)status);
+}
+
+static FLAC__bool generate_file_(FLAC__bool include_extras, FLAC__bool is_ogg)
+{
+	FLAC__StreamMetadata streaminfo, vorbiscomment, *cuesheet, picture, padding;
+	FLAC__StreamMetadata *metadata[4];
+	uint32_t i = 0, n = 0;
+
+	printf("generating %sFLAC file for test\n", is_ogg? "Ogg " : "");
+
+	while(our_metadata_.num_blocks > 0)
+		delete_from_our_metadata_(0);
+
+	streaminfo.is_last = false;
+	streaminfo.type = FLAC__METADATA_TYPE_STREAMINFO;
+	streaminfo.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
+	streaminfo.data.stream_info.min_blocksize = 576;
+	streaminfo.data.stream_info.max_blocksize = 576;
+	streaminfo.data.stream_info.min_framesize = 0;
+	streaminfo.data.stream_info.max_framesize = 0;
+	streaminfo.data.stream_info.sample_rate = 44100;
+	streaminfo.data.stream_info.channels = 1;
+	streaminfo.data.stream_info.bits_per_sample = 8;
+	streaminfo.data.stream_info.total_samples = 0;
+	memset(streaminfo.data.stream_info.md5sum, 0, 16);
+
+	{
+		const uint32_t vendor_string_length = (uint32_t)strlen(FLAC__VENDOR_STRING);
+		vorbiscomment.is_last = false;
+		vorbiscomment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT;
+		vorbiscomment.length = (4 + vendor_string_length) + 4;
+		vorbiscomment.data.vorbis_comment.vendor_string.length = vendor_string_length;
+		vorbiscomment.data.vorbis_comment.vendor_string.entry = malloc_or_die_(vendor_string_length+1);
+		memcpy(vorbiscomment.data.vorbis_comment.vendor_string.entry, FLAC__VENDOR_STRING, vendor_string_length+1);
+		vorbiscomment.data.vorbis_comment.num_comments = 0;
+		vorbiscomment.data.vorbis_comment.comments = 0;
+	}
+
+	{
+		if (0 == (cuesheet = FLAC__metadata_object_new(FLAC__METADATA_TYPE_CUESHEET)))
+			return die_("priming our metadata");
+		cuesheet->is_last = false;
+		safe_strncpy(cuesheet->data.cue_sheet.media_catalog_number, "bogo-MCN", sizeof(cuesheet->data.cue_sheet.media_catalog_number));
+		cuesheet->data.cue_sheet.lead_in = 123;
+		cuesheet->data.cue_sheet.is_cd = false;
+		if (!FLAC__metadata_object_cuesheet_insert_blank_track(cuesheet, 0))
+			return die_("priming our metadata");
+		cuesheet->data.cue_sheet.tracks[0].number = 1;
+		if (!FLAC__metadata_object_cuesheet_track_insert_blank_index(cuesheet, 0, 0))
+			return die_("priming our metadata");
+	}
+
+	{
+		picture.is_last = false;
+		picture.type = FLAC__METADATA_TYPE_PICTURE;
+		picture.length =
+			(
+				FLAC__STREAM_METADATA_PICTURE_TYPE_LEN +
+				FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN + /* will add the length for the string later */
+				FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN + /* will add the length for the string later */
+				FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN +
+				FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN +
+				FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN +
+				FLAC__STREAM_METADATA_PICTURE_COLORS_LEN +
+				FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN /* will add the length for the data later */
+			) / 8
+		;
+		picture.data.picture.type = FLAC__STREAM_METADATA_PICTURE_TYPE_FRONT_COVER;
+		picture.data.picture.mime_type = strdup_or_die_("image/jpeg");
+		picture.length += strlen(picture.data.picture.mime_type);
+		picture.data.picture.description = (FLAC__byte*)strdup_or_die_("desc");
+		picture.length += strlen((const char *)picture.data.picture.description);
+		picture.data.picture.width = 300;
+		picture.data.picture.height = 300;
+		picture.data.picture.depth = 24;
+		picture.data.picture.colors = 0;
+		picture.data.picture.data = (FLAC__byte*)strdup_or_die_("SOMEJPEGDATA");
+		picture.data.picture.data_length = strlen((const char *)picture.data.picture.data);
+		picture.length += picture.data.picture.data_length;
+	}
+
+	padding.is_last = true;
+	padding.type = FLAC__METADATA_TYPE_PADDING;
+	padding.length = 1234;
+
+	metadata[n++] = &vorbiscomment;
+	if(include_extras) {
+		metadata[n++] = cuesheet;
+		metadata[n++] = &picture;
+	}
+	metadata[n++] = &padding;
+
+	if(
+		!insert_to_our_metadata_(&streaminfo, i++, /*copy=*/true) ||
+		!insert_to_our_metadata_(&vorbiscomment, i++, /*copy=*/true) ||
+		(include_extras && !insert_to_our_metadata_(cuesheet, i++, /*copy=*/false)) ||
+		(include_extras && !insert_to_our_metadata_(&picture, i++, /*copy=*/true)) ||
+		!insert_to_our_metadata_(&padding, i++, /*copy=*/true)
+	)
+		return die_("priming our metadata");
+
+	if(!file_utils__generate_flacfile(is_ogg, flacfilename(is_ogg), 0, 512 * 1024, &streaminfo, metadata, n))
+		return die_("creating the encoded file");
+
+	free(vorbiscomment.data.vorbis_comment.vendor_string.entry);
+	free(picture.data.picture.mime_type);
+	free(picture.data.picture.description);
+	free(picture.data.picture.data);
+	if(!include_extras)
+		FLAC__metadata_object_delete(cuesheet);
+
+	return true;
+}
+
+static FLAC__bool test_file_(FLAC__bool is_ogg, FLAC__StreamDecoderMetadataCallback metadata_callback)
+{
+	const char *filename = flacfilename(is_ogg);
+	FLAC__StreamDecoder *decoder;
+	decoder_client_struct decoder_client_data;
+
+	FLAC__ASSERT(0 != metadata_callback);
+
+	mc_our_block_number_ = 0;
+	decoder_client_data.error_occurred = false;
+
+	printf("\ttesting '%s'... ", filename);
+	fflush(stdout);
+
+	if(0 == (decoder = FLAC__stream_decoder_new()))
+		return die_("couldn't allocate decoder instance");
+
+	FLAC__stream_decoder_set_md5_checking(decoder, true);
+	FLAC__stream_decoder_set_metadata_respond_all(decoder);
+	if(
+		(is_ogg?
+			FLAC__stream_decoder_init_ogg_file(decoder, filename, decoder_write_callback_, metadata_callback, decoder_error_callback_, &decoder_client_data) :
+			FLAC__stream_decoder_init_file(decoder, filename, decoder_write_callback_, metadata_callback, decoder_error_callback_, &decoder_client_data)
+		) != FLAC__STREAM_DECODER_INIT_STATUS_OK
+	) {
+		(void)FLAC__stream_decoder_finish(decoder);
+		FLAC__stream_decoder_delete(decoder);
+		return die_("initializing decoder\n");
+	}
+	if(!FLAC__stream_decoder_process_until_end_of_stream(decoder)) {
+		(void)FLAC__stream_decoder_finish(decoder);
+		FLAC__stream_decoder_delete(decoder);
+		return die_("decoding file\n");
+	}
+
+	(void)FLAC__stream_decoder_finish(decoder);
+	FLAC__stream_decoder_delete(decoder);
+
+	if(decoder_client_data.error_occurred)
+		return false;
+
+	if(mc_our_block_number_ != our_metadata_.num_blocks)
+		return die_("short metadata block count");
+
+	printf("PASSED\n");
+	return true;
+}
+
+static FLAC__bool change_stats_(const char *filename, FLAC__bool read_only)
+{
+	if(!grabbag__file_change_stats(filename, read_only))
+		return die_("during grabbag__file_change_stats()");
+
+	return true;
+}
+
+static FLAC__bool remove_file_(const char *filename)
+{
+	while(our_metadata_.num_blocks > 0)
+		delete_from_our_metadata_(0);
+
+	if(!grabbag__file_remove_file(filename))
+		return die_("removing file");
+
+	return true;
+}
+
+static FLAC__bool test_level_0_(void)
+{
+	FLAC__StreamMetadata streaminfo;
+	FLAC__StreamMetadata *tags = 0;
+	FLAC__StreamMetadata *cuesheet = 0;
+	FLAC__StreamMetadata *picture = 0;
+
+	printf("\n\n++++++ testing level 0 interface\n");
+
+	if(!generate_file_(/*include_extras=*/true, /*is_ogg=*/false))
+		return false;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_null_))
+		return false;
+
+	printf("testing FLAC__metadata_get_streaminfo()... ");
+
+	if(!FLAC__metadata_get_streaminfo(flacfilename(/*is_ogg=*/false), &streaminfo))
+		return die_("during FLAC__metadata_get_streaminfo()");
+
+	/* check to see if some basic data matches (c.f. generate_file_()) */
+	if(streaminfo.data.stream_info.channels != 1)
+		return die_("mismatch in streaminfo.data.stream_info.channels");
+	if(streaminfo.data.stream_info.bits_per_sample != 8)
+		return die_("mismatch in streaminfo.data.stream_info.bits_per_sample");
+	if(streaminfo.data.stream_info.sample_rate != 44100)
+		return die_("mismatch in streaminfo.data.stream_info.sample_rate");
+	if(streaminfo.data.stream_info.min_blocksize != 576)
+		return die_("mismatch in streaminfo.data.stream_info.min_blocksize");
+	if(streaminfo.data.stream_info.max_blocksize != 576)
+		return die_("mismatch in streaminfo.data.stream_info.max_blocksize");
+
+	printf("OK\n");
+
+	printf("testing FLAC__metadata_get_tags()... ");
+
+	if(!FLAC__metadata_get_tags(flacfilename(/*is_ogg=*/false), &tags))
+		return die_("during FLAC__metadata_get_tags()");
+
+	/* check to see if some basic data matches (c.f. generate_file_()) */
+	if(tags->data.vorbis_comment.num_comments != 0)
+		return die_("mismatch in tags->data.vorbis_comment.num_comments");
+
+	printf("OK\n");
+
+	FLAC__metadata_object_delete(tags);
+
+	printf("testing FLAC__metadata_get_cuesheet()... ");
+
+	if(!FLAC__metadata_get_cuesheet(flacfilename(/*is_ogg=*/false), &cuesheet))
+		return die_("during FLAC__metadata_get_cuesheet()");
+
+	/* check to see if some basic data matches (c.f. generate_file_()) */
+	if(cuesheet->data.cue_sheet.lead_in != 123)
+		return die_("mismatch in cuesheet->data.cue_sheet.lead_in");
+
+	printf("OK\n");
+
+	FLAC__metadata_object_delete(cuesheet);
+
+	printf("testing FLAC__metadata_get_picture()... ");
+
+	if(!FLAC__metadata_get_picture(flacfilename(/*is_ogg=*/false), &picture, /*type=*/(FLAC__StreamMetadata_Picture_Type)(-1), /*mime_type=*/0, /*description=*/0, /*max_width=*/(uint32_t)(-1), /*max_height=*/(uint32_t)(-1), /*max_depth=*/(uint32_t)(-1), /*max_colors=*/(uint32_t)(-1)))
+		return die_("during FLAC__metadata_get_picture()");
+
+	/* check to see if some basic data matches (c.f. generate_file_()) */
+	if(picture->data.picture.type != FLAC__STREAM_METADATA_PICTURE_TYPE_FRONT_COVER)
+		return die_("mismatch in picture->data.picture.type");
+
+	printf("OK\n");
+
+	FLAC__metadata_object_delete(picture);
+
+	if(!remove_file_(flacfilename(/*is_ogg=*/false)))
+		return false;
+
+	return true;
+}
+
+static FLAC__bool test_level_1_(void)
+{
+	FLAC__Metadata_SimpleIterator *iterator;
+	FLAC__StreamMetadata *block, *app, *padding;
+	FLAC__byte data[1000];
+	uint32_t our_current_position = 0;
+
+	/* initialize 'data' to avoid Valgrind errors */
+	memset(data, 0, sizeof(data));
+
+	printf("\n\n++++++ testing level 1 interface\n");
+
+	/************************************************************/
+
+	printf("simple iterator on read-only file\n");
+
+	if(!generate_file_(/*include_extras=*/false, /*is_ogg=*/false))
+		return false;
+
+	if(!change_stats_(flacfilename(/*is_ogg=*/false), /*read_only=*/true))
+		return false;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_null_))
+		return false;
+
+	if(0 == (iterator = FLAC__metadata_simple_iterator_new()))
+		return die_("FLAC__metadata_simple_iterator_new()");
+
+	if(!FLAC__metadata_simple_iterator_init(iterator, flacfilename(/*is_ogg=*/false), /*read_only=*/false, /*preserve_file_stats=*/false))
+		return die_("FLAC__metadata_simple_iterator_init() returned false");
+
+	printf("is writable = %u\n", (uint32_t)FLAC__metadata_simple_iterator_is_writable(iterator));
+	if(FLAC__metadata_simple_iterator_is_writable(iterator))
+		return die_("iterator claims file is writable when tester thinks it should not be; are you running as root?\n");
+
+	printf("iterate forwards\n");
+
+	if(FLAC__metadata_simple_iterator_get_block_type(iterator) != FLAC__METADATA_TYPE_STREAMINFO)
+		return die_("expected STREAMINFO type from FLAC__metadata_simple_iterator_get_block_type()");
+	if(0 == (block = FLAC__metadata_simple_iterator_get_block(iterator)))
+		return die_("getting block 0");
+	if(block->type != FLAC__METADATA_TYPE_STREAMINFO)
+		return die_("expected STREAMINFO type");
+	if(block->is_last)
+		return die_("expected is_last to be false");
+	if(block->length != FLAC__STREAM_METADATA_STREAMINFO_LENGTH)
+		return die_("bad STREAMINFO length");
+	/* check to see if some basic data matches (c.f. generate_file_()) */
+	if(block->data.stream_info.channels != 1)
+		return die_("mismatch in channels");
+	if(block->data.stream_info.bits_per_sample != 8)
+		return die_("mismatch in bits_per_sample");
+	if(block->data.stream_info.sample_rate != 44100)
+		return die_("mismatch in sample_rate");
+	if(block->data.stream_info.min_blocksize != 576)
+		return die_("mismatch in min_blocksize");
+	if(block->data.stream_info.max_blocksize != 576)
+		return die_("mismatch in max_blocksize");
+	FLAC__metadata_object_delete(block);
+
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("forward iterator ended early");
+	our_current_position++;
+
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("forward iterator ended early");
+	our_current_position++;
+
+	if(FLAC__metadata_simple_iterator_get_block_type(iterator) != FLAC__METADATA_TYPE_PADDING)
+		return die_("expected PADDING type from FLAC__metadata_simple_iterator_get_block_type()");
+	if(0 == (block = FLAC__metadata_simple_iterator_get_block(iterator)))
+		return die_("getting block 2");
+	if(block->type != FLAC__METADATA_TYPE_PADDING)
+		return die_("expected PADDING type");
+	if(!block->is_last)
+		return die_("expected is_last to be true");
+	/* check to see if some basic data matches (c.f. generate_file_()) */
+	if(block->length != 1234)
+		return die_("bad PADDING length");
+	FLAC__metadata_object_delete(block);
+
+	if(FLAC__metadata_simple_iterator_next(iterator))
+		return die_("forward iterator returned true but should have returned false");
+
+	printf("iterate backwards\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("reverse iterator ended early");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("reverse iterator ended early");
+	if(FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("reverse iterator returned true but should have returned false");
+
+	printf("testing FLAC__metadata_simple_iterator_set_block() on read-only file...\n");
+
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, (FLAC__StreamMetadata*)99, false))
+		printf("OK: FLAC__metadata_simple_iterator_set_block() returned false like it should\n");
+	else
+		return die_("FLAC__metadata_simple_iterator_set_block() returned true but shouldn't have");
+
+	FLAC__metadata_simple_iterator_delete(iterator);
+
+	/************************************************************/
+
+	printf("simple iterator on writable file\n");
+
+	if(!change_stats_(flacfilename(/*is_ogg=*/false), /*read-only=*/false))
+		return false;
+
+	printf("creating APPLICATION block\n");
+
+	if(0 == (app = FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION)))
+		return die_("FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION)");
+	memcpy(app->data.application.id, "duh", (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8));
+
+	printf("creating PADDING block\n");
+
+	if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
+		return die_("FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)");
+	padding->length = 20;
+
+	if(0 == (iterator = FLAC__metadata_simple_iterator_new()))
+		return die_("FLAC__metadata_simple_iterator_new()");
+
+	if(!FLAC__metadata_simple_iterator_init(iterator, flacfilename(/*is_ogg=*/false), /*read_only=*/false, /*preserve_file_stats=*/false))
+		return die_("FLAC__metadata_simple_iterator_init() returned false");
+	our_current_position = 0;
+
+	printf("is writable = %u\n", (uint32_t)FLAC__metadata_simple_iterator_is_writable(iterator));
+
+	printf("[S]VP\ttry to write over STREAMINFO block...\n");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, false))
+		printf("\tFLAC__metadata_simple_iterator_set_block() returned false like it should\n");
+	else
+		return die_("FLAC__metadata_simple_iterator_set_block() returned true but shouldn't have");
+
+	if(FLAC__metadata_simple_iterator_status(iterator) != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT)
+		return die_("FLAC__metadata_simple_iterator_status() should have been FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT");
+
+	printf("[S]VP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("S[V]P\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]\tinsert PADDING after, don't expand into padding\n");
+	padding->length = 25;
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false)", iterator);
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return false;
+
+	printf("SVP[P]\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("SV[P]P\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("S[V]PP\tinsert PADDING after, don't expand into padding\n");
+	padding->length = 30;
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false)", iterator);
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return false;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[P]PP\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("S[V]PPP\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("[S]VPPP\tdelete (STREAMINFO block), must fail\n");
+	if(FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false) should have returned false", iterator);
+
+	if(FLAC__metadata_simple_iterator_status(iterator) != FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT)
+		return die_("FLAC__metadata_simple_iterator_status() should have been FLAC__METADATA_SIMPLE_ITERATOR_STATUS_ILLEGAL_INPUT");
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("[S]VPPP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("S[V]PPP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]PP\tdelete (middle block), replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, true))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, true)", iterator);
+	our_current_position--;
+
+	printf("S[V]PPP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]PP\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("S[V]PP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]P\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVP[P]\tdelete (last block), replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, true))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	our_current_position--;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[P]P\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVP[P]\tdelete (last block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[P]\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("S[V]P\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("[S]VP\tset STREAMINFO (change sample rate)\n");
+	FLAC__ASSERT(our_current_position == 0);
+	block = FLAC__metadata_simple_iterator_get_block(iterator);
+	block->data.stream_info.sample_rate = 32000;
+	if(!replace_in_our_metadata_(block, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, block, false))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, block, false)", iterator);
+	FLAC__metadata_object_delete(block);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("[S]VP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("S[V]P\tinsert APPLICATION after, expand into padding of exceeding size\n");
+	app->data.application.id[0] = 'e'; /* twiddle the id so that our comparison doesn't miss transposition */
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true)", iterator);
+	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
+		return false;
+	our_metadata_.blocks[our_current_position+1]->length -= (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) + app->length;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVA[P]\tset APPLICATION, expand into padding of exceeding size\n");
+	app->data.application.id[0] = 'f'; /* twiddle the id */
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+	if(!insert_to_our_metadata_(app, our_current_position, /*copy=*/true))
+		return false;
+	our_metadata_.blocks[our_current_position+1]->length -= (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) + app->length;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVA[A]P\tset APPLICATION (grow), don't expand into padding\n");
+	app->data.application.id[0] = 'g'; /* twiddle the id */
+	if(!FLAC__metadata_object_application_set_data(app, data, sizeof(data), true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, false))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, false)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVA[A]P\tset APPLICATION (shrink), don't fill in with padding\n");
+	app->data.application.id[0] = 'h'; /* twiddle the id */
+	if(!FLAC__metadata_object_application_set_data(app, data, 12, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, false))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, false)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVA[A]P\tset APPLICATION (grow), expand into padding of exceeding size\n");
+	app->data.application.id[0] = 'i'; /* twiddle the id */
+	if(!FLAC__metadata_object_application_set_data(app, data, sizeof(data), true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	our_metadata_.blocks[our_current_position+1]->length -= (sizeof(data) - 12);
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVA[A]P\tset APPLICATION (shrink), fill in with padding\n");
+	app->data.application.id[0] = 'j'; /* twiddle the id */
+	if(!FLAC__metadata_object_application_set_data(app, data, 23, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!insert_to_our_metadata_(padding, our_current_position+1, /*copy=*/true))
+		return die_("copying object");
+	our_metadata_.blocks[our_current_position+1]->length = sizeof(data) - 23 - FLAC__STREAM_METADATA_HEADER_LENGTH;
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVA[A]PP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVAA[P]P\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVAAP[P]\tset PADDING (shrink), don't fill in with padding\n");
+	padding->length = 5;
+	if(!replace_in_our_metadata_(padding, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, padding, false)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVAAP[P]\tset APPLICATION (grow)\n");
+	app->data.application.id[0] = 'k'; /* twiddle the id */
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, false))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, false)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVAAP[A]\tset PADDING (equal)\n");
+	padding->length = 27;
+	if(!replace_in_our_metadata_(padding, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, padding, false)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVAAP[P]\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("SVAA[P]P\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVA[A]P\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVA[P]\tinsert PADDING after\n");
+	padding->length = 5;
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false)", iterator);
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return false;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVAP[P]\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("SVA[P]P\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("SV[A]PP\tset APPLICATION (grow), try to expand into padding which is too small\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 32, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PP\tset APPLICATION (grow), try to expand into padding which is 'close' but still too small\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 60, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PP\tset APPLICATION (grow), expand into padding which will leave 0-length pad\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 87, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	our_metadata_.blocks[our_current_position+1]->length = 0;
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PP\tset APPLICATION (grow), expand into padding which is exactly consumed\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 91, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	delete_from_our_metadata_(our_current_position+1);
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tset APPLICATION (grow), expand into padding which is exactly consumed\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 100, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	delete_from_our_metadata_(our_current_position+1);
+	our_metadata_.blocks[our_current_position]->is_last = true;
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tset PADDING (equal size)\n");
+	padding->length = app->length;
+	if(!replace_in_our_metadata_(padding, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_set_block(iterator, padding, true))
+		return die_ss_("FLAC__metadata_simple_iterator_set_block(iterator, padding, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[P]\tinsert PADDING after\n");
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false)", iterator);
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return false;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVP[P]\tinsert PADDING after\n");
+	padding->length = 5;
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, padding, false)", iterator);
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return false;
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVPP[P]\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("SVP[P]P\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("SV[P]PP\tprev\n");
+	if(!FLAC__metadata_simple_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("S[V]PPP\tinsert APPLICATION after, try to expand into padding which is too small\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 101, true))
+		return die_("setting APPLICATION data");
+	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PPP\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("S[V]PPP\tinsert APPLICATION after, try to expand into padding which is 'close' but still too small\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 97, true))
+		return die_("setting APPLICATION data");
+	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PPP\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("S[V]PPP\tinsert APPLICATION after, expand into padding which is exactly consumed\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 100, true))
+		return die_("setting APPLICATION data");
+	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
+		return die_("copying object");
+	delete_from_our_metadata_(our_current_position+1);
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PP\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("S[V]PP\tinsert APPLICATION after, expand into padding which will leave 0-length pad\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 96, true))
+		return die_("setting APPLICATION data");
+	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
+		return die_("copying object");
+	our_metadata_.blocks[our_current_position+1]->length = 0;
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]PP\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("S[V]PP\tnext\n");
+	if(!FLAC__metadata_simple_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]P\tdelete (middle block), don't replace with padding\n");
+	if(!FLAC__metadata_simple_iterator_delete_block(iterator, false))
+		return die_ss_("FLAC__metadata_simple_iterator_delete_block(iterator, false)", iterator);
+	delete_from_our_metadata_(our_current_position--);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("S[V]P\tinsert APPLICATION after, expand into padding which is exactly consumed\n");
+	if(!FLAC__metadata_object_application_set_data(app, data, 1, true))
+		return die_("setting APPLICATION data");
+	if(!insert_to_our_metadata_(app, ++our_current_position, /*copy=*/true))
+		return die_("copying object");
+	delete_from_our_metadata_(our_current_position+1);
+	if(!FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true))
+		return die_ss_("FLAC__metadata_simple_iterator_insert_block_after(iterator, app, true)", iterator);
+
+	if(!test_file_(/*is_ogg=*/false, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("delete simple iterator\n");
+
+	FLAC__metadata_simple_iterator_delete(iterator);
+
+	FLAC__metadata_object_delete(app);
+	FLAC__metadata_object_delete(padding);
+
+	if(!remove_file_(flacfilename(/*is_ogg=*/false)))
+		return false;
+
+	return true;
+}
+
+static FLAC__bool test_level_2_(FLAC__bool filename_based, FLAC__bool is_ogg)
+{
+	FLAC__Metadata_Iterator *iterator;
+	FLAC__Metadata_Chain *chain;
+	FLAC__StreamMetadata *block, *app, *padding;
+	FLAC__byte data[2000];
+	uint32_t our_current_position;
+
+	/* initialize 'data' to avoid Valgrind errors */
+	memset(data, 0, sizeof(data));
+
+	printf("\n\n++++++ testing level 2 interface (%s-based, %s FLAC)\n", filename_based? "filename":"callback", is_ogg? "Ogg":"native");
+
+	printf("generate read-only file\n");
+
+	if(!generate_file_(/*include_extras=*/false, is_ogg))
+		return false;
+
+	if(!change_stats_(flacfilename(is_ogg), /*read_only=*/true))
+		return false;
+
+	printf("create chain\n");
+
+	if(0 == (chain = FLAC__metadata_chain_new()))
+		return die_("allocating chain");
+
+	printf("read chain\n");
+
+	if(!read_chain_(chain, flacfilename(is_ogg), filename_based, is_ogg))
+		return die_c_("reading chain", FLAC__metadata_chain_status(chain));
+
+	printf("[S]VP\ttest initial metadata\n");
+
+	if(!compare_chain_(chain, 0, 0))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	if(is_ogg)
+		goto end;
+
+	printf("switch file to read-write\n");
+
+	if(!change_stats_(flacfilename(is_ogg), /*read-only=*/false))
+		return false;
+
+	printf("create iterator\n");
+	if(0 == (iterator = FLAC__metadata_iterator_new()))
+		return die_("allocating memory for iterator");
+
+	our_current_position = 0;
+
+	FLAC__metadata_iterator_init(iterator, chain);
+
+	if(0 == (block = FLAC__metadata_iterator_get_block(iterator)))
+		return die_("getting block from iterator");
+
+	FLAC__ASSERT(block->type == FLAC__METADATA_TYPE_STREAMINFO);
+
+	printf("[S]VP\tmodify STREAMINFO, write\n");
+
+	block->data.stream_info.sample_rate = 32000;
+	if(!replace_in_our_metadata_(block, our_current_position, /*copy=*/true))
+		return die_("copying object");
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/true, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, true)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("[S]VP\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("S[V]P\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]\treplace PADDING with identical-size APPLICATION\n");
+	if(0 == (block = FLAC__metadata_iterator_get_block(iterator)))
+		return die_("getting block from iterator");
+	if(0 == (app = FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION)))
+		return die_("FLAC__metadata_object_new(FLAC__METADATA_TYPE_APPLICATION)");
+	memcpy(app->data.application.id, "duh", (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8));
+	if(!FLAC__metadata_object_application_set_data(app, data, block->length-(FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tshrink APPLICATION, don't use padding\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 26, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tgrow APPLICATION, don't use padding\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 28, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tgrow APPLICATION, use padding, but last block is not padding\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 36, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tshrink APPLICATION, use padding, last block is not padding, but delta is too small for new PADDING block\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 33, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tshrink APPLICATION, use padding, last block is not padding, delta is enough for new PADDING block\n");
+	if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
+		return die_("creating PADDING block");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 29, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	padding->length = 0;
+	if(!insert_to_our_metadata_(padding, our_current_position+1, /*copy=*/false))
+		return die_("internal error");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tshrink APPLICATION, use padding, last block is padding\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 16, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	our_metadata_.blocks[our_current_position+1]->length = 13;
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tgrow APPLICATION, use padding, last block is padding, but delta is too small\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 50, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tgrow APPLICATION, use padding, last block is padding of exceeding size\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 56, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	our_metadata_.blocks[our_current_position+1]->length -= (56 - 50);
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]P\tgrow APPLICATION, use padding, last block is padding of exact size\n");
+	if(0 == (app = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("copying object");
+	if(!FLAC__metadata_object_application_set_data(app, data, 67, true))
+		return die_("setting APPLICATION data");
+	if(!replace_in_our_metadata_(app, our_current_position, /*copy=*/true))
+		return die_("copying object");
+	delete_from_our_metadata_(our_current_position+1);
+	if(!FLAC__metadata_iterator_set_block(iterator, app))
+		return die_c_("FLAC__metadata_iterator_set_block(iterator, app)", FLAC__metadata_chain_status(chain));
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV[A]\tprev\n");
+	if(!FLAC__metadata_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("S[V]A\tprev\n");
+	if(!FLAC__metadata_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("[S]VA\tinsert PADDING before STREAMINFO (should fail)\n");
+	if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
+		return die_("creating PADDING block");
+	padding->length = 30;
+	if(!FLAC__metadata_iterator_insert_block_before(iterator, padding))
+		printf("\tFLAC__metadata_iterator_insert_block_before() returned false like it should\n");
+	else
+		return die_("FLAC__metadata_iterator_insert_block_before() should have returned false");
+
+	printf("[S]VP\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("S[V]A\tinsert PADDING after\n");
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return die_("copying metadata");
+	if(!FLAC__metadata_iterator_insert_block_after(iterator, padding))
+		return die_("FLAC__metadata_iterator_insert_block_after(iterator, padding)");
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("SV[P]A\tinsert PADDING before\n");
+	if(0 == (padding = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("creating PADDING block");
+	padding->length = 17;
+	if(!insert_to_our_metadata_(padding, our_current_position, /*copy=*/true))
+		return die_("copying metadata");
+	if(!FLAC__metadata_iterator_insert_block_before(iterator, padding))
+		return die_("FLAC__metadata_iterator_insert_block_before(iterator, padding)");
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("SV[P]PA\tinsert PADDING before\n");
+	if(0 == (padding = FLAC__metadata_object_clone(our_metadata_.blocks[our_current_position])))
+		return die_("creating PADDING block");
+	padding->length = 0;
+	if(!insert_to_our_metadata_(padding, our_current_position, /*copy=*/true))
+		return die_("copying metadata");
+	if(!FLAC__metadata_iterator_insert_block_before(iterator, padding))
+		return die_("FLAC__metadata_iterator_insert_block_before(iterator, padding)");
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("SV[P]PPA\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVP[P]PA\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVPP[P]A\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SVPPP[A]\tinsert PADDING after\n");
+	if(0 == (padding = FLAC__metadata_object_clone(our_metadata_.blocks[2])))
+		return die_("creating PADDING block");
+	padding->length = 57;
+	if(!insert_to_our_metadata_(padding, ++our_current_position, /*copy=*/true))
+		return die_("copying metadata");
+	if(!FLAC__metadata_iterator_insert_block_after(iterator, padding))
+		return die_("FLAC__metadata_iterator_insert_block_after(iterator, padding)");
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("SVPPPA[P]\tinsert PADDING before\n");
+	if(0 == (padding = FLAC__metadata_object_clone(our_metadata_.blocks[2])))
+		return die_("creating PADDING block");
+	padding->length = 99;
+	if(!insert_to_our_metadata_(padding, our_current_position, /*copy=*/true))
+		return die_("copying metadata");
+	if(!FLAC__metadata_iterator_insert_block_before(iterator, padding))
+		return die_("FLAC__metadata_iterator_insert_block_before(iterator, padding)");
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("delete iterator\n");
+	FLAC__metadata_iterator_delete(iterator);
+	our_current_position = 0;
+
+	printf("SVPPPAPP\tmerge padding\n");
+	FLAC__metadata_chain_merge_padding(chain);
+	our_metadata_.blocks[2]->length += (FLAC__STREAM_METADATA_HEADER_LENGTH + our_metadata_.blocks[3]->length);
+	our_metadata_.blocks[2]->length += (FLAC__STREAM_METADATA_HEADER_LENGTH + our_metadata_.blocks[4]->length);
+	our_metadata_.blocks[6]->length += (FLAC__STREAM_METADATA_HEADER_LENGTH + our_metadata_.blocks[7]->length);
+	delete_from_our_metadata_(7);
+	delete_from_our_metadata_(4);
+	delete_from_our_metadata_(3);
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, 0, 0))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SVPAP\tsort padding\n");
+	FLAC__metadata_chain_sort_padding(chain);
+	our_metadata_.blocks[4]->length += (FLAC__STREAM_METADATA_HEADER_LENGTH + our_metadata_.blocks[2]->length);
+	delete_from_our_metadata_(2);
+
+	if(!write_chain_(chain, /*use_padding=*/true, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, true, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, 0, 0))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("create iterator\n");
+	if(0 == (iterator = FLAC__metadata_iterator_new()))
+		return die_("allocating memory for iterator");
+
+	our_current_position = 0;
+
+	FLAC__metadata_iterator_init(iterator, chain);
+
+	printf("[S]VAP\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("S[V]AP\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[A]P\tdelete middle block, replace with padding\n");
+	if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
+		return die_("creating PADDING block");
+	padding->length = 71;
+	if(!replace_in_our_metadata_(padding, our_current_position--, /*copy=*/false))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_delete_block(iterator, /*replace_with_padding=*/true))
+		return die_c_("FLAC__metadata_iterator_delete_block(iterator, true)", FLAC__metadata_chain_status(chain));
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("S[V]PP\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]P\tdelete middle block, don't replace with padding\n");
+	delete_from_our_metadata_(our_current_position--);
+	if(!FLAC__metadata_iterator_delete_block(iterator, /*replace_with_padding=*/false))
+		return die_c_("FLAC__metadata_iterator_delete_block(iterator, false)", FLAC__metadata_chain_status(chain));
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("S[V]P\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]\tdelete last block, replace with padding\n");
+	if(0 == (padding = FLAC__metadata_object_new(FLAC__METADATA_TYPE_PADDING)))
+		return die_("creating PADDING block");
+	padding->length = 219;
+	if(!replace_in_our_metadata_(padding, our_current_position--, /*copy=*/false))
+		return die_("copying object");
+	if(!FLAC__metadata_iterator_delete_block(iterator, /*replace_with_padding=*/true))
+		return die_c_("FLAC__metadata_iterator_delete_block(iterator, true)", FLAC__metadata_chain_status(chain));
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("S[V]P\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+	our_current_position++;
+
+	printf("SV[P]\tdelete last block, don't replace with padding\n");
+	delete_from_our_metadata_(our_current_position--);
+	if(!FLAC__metadata_iterator_delete_block(iterator, /*replace_with_padding=*/false))
+		return die_c_("FLAC__metadata_iterator_delete_block(iterator, false)", FLAC__metadata_chain_status(chain));
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("S[V]\tprev\n");
+	if(!FLAC__metadata_iterator_prev(iterator))
+		return die_("iterator ended early\n");
+	our_current_position--;
+
+	printf("[S]V\tdelete STREAMINFO block, should fail\n");
+	if(FLAC__metadata_iterator_delete_block(iterator, /*replace_with_padding=*/false))
+		return die_("FLAC__metadata_iterator_delete_block() on STREAMINFO should have failed but didn't");
+
+	if(!compare_chain_(chain, our_current_position, FLAC__metadata_iterator_get_block(iterator)))
+		return false;
+
+	printf("delete iterator\n");
+	FLAC__metadata_iterator_delete(iterator);
+	our_current_position = 0;
+
+	printf("SV\tmerge padding\n");
+	FLAC__metadata_chain_merge_padding(chain);
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, 0, 0))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+	printf("SV\tsort padding\n");
+	FLAC__metadata_chain_sort_padding(chain);
+
+	if(!write_chain_(chain, /*use_padding=*/false, /*preserve_file_stats=*/false, filename_based, flacfilename(is_ogg)))
+		return die_c_("during FLAC__metadata_chain_write(chain, false, false)", FLAC__metadata_chain_status(chain));
+	if(!compare_chain_(chain, 0, 0))
+		return false;
+	if(!test_file_(is_ogg, decoder_metadata_callback_compare_))
+		return false;
+
+end:
+	printf("delete chain\n");
+
+	FLAC__metadata_chain_delete(chain);
+
+	if(!remove_file_(flacfilename(is_ogg)))
+		return false;
+
+	return true;
+}
+
+static FLAC__bool test_level_2_misc_(FLAC__bool is_ogg)
+{
+	FLAC__Metadata_Iterator *iterator;
+	FLAC__Metadata_Chain *chain;
+	FLAC__IOCallbacks callbacks;
+
+	memset(&callbacks, 0, sizeof(callbacks));
+	callbacks.read = (FLAC__IOCallback_Read)fread;
+#ifdef FLAC__VALGRIND_TESTING
+	callbacks.write = chain_write_cb_;
+#else
+	callbacks.write = (FLAC__IOCallback_Write)fwrite;
+#endif
+	callbacks.seek = chain_seek_cb_;
+	callbacks.tell = chain_tell_cb_;
+	callbacks.eof = chain_eof_cb_;
+
+	printf("\n\n++++++ testing level 2 interface (mismatched read/write protections)\n");
+
+	printf("generate file\n");
+
+	if(!generate_file_(/*include_extras=*/false, is_ogg))
+		return false;
+
+	printf("create chain\n");
+
+	if(0 == (chain = FLAC__metadata_chain_new()))
+		return die_("allocating chain");
+
+	printf("read chain (filename-based)\n");
+
+	if(!FLAC__metadata_chain_read(chain, flacfilename(is_ogg)))
+		return die_c_("reading chain", FLAC__metadata_chain_status(chain));
+
+	printf("write chain with wrong method FLAC__metadata_chain_write_with_callbacks()\n");
+	{
+		if(FLAC__metadata_chain_write_with_callbacks(chain, /*use_padding=*/false, 0, callbacks))
+			return die_c_("mismatched write should have failed", FLAC__metadata_chain_status(chain));
+		if(FLAC__metadata_chain_status(chain) != FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH)
+			return die_c_("expected FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH", FLAC__metadata_chain_status(chain));
+		printf("  OK: FLAC__metadata_chain_write_with_callbacks() returned false,FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH like it should\n");
+	}
+
+	printf("read chain (filename-based)\n");
+
+	if(!FLAC__metadata_chain_read(chain, flacfilename(is_ogg)))
+		return die_c_("reading chain", FLAC__metadata_chain_status(chain));
+
+	printf("write chain with wrong method FLAC__metadata_chain_write_with_callbacks_and_tempfile()\n");
+	{
+		if(FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain, /*use_padding=*/false, 0, callbacks, 0, callbacks))
+			return die_c_("mismatched write should have failed", FLAC__metadata_chain_status(chain));
+		if(FLAC__metadata_chain_status(chain) != FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH)
+			return die_c_("expected FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH", FLAC__metadata_chain_status(chain));
+		printf("  OK: FLAC__metadata_chain_write_with_callbacks_and_tempfile() returned false,FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH like it should\n");
+	}
+
+	printf("read chain (callback-based)\n");
+	{
+		FILE *file = flac_fopen(flacfilename(is_ogg), "rb");
+		if(0 == file)
+			return die_("opening file");
+		if(!FLAC__metadata_chain_read_with_callbacks(chain, (FLAC__IOHandle)file, callbacks)) {
+			fclose(file);
+			return die_c_("reading chain", FLAC__metadata_chain_status(chain));
+		}
+		fclose(file);
+	}
+
+	printf("write chain with wrong method FLAC__metadata_chain_write()\n");
+	{
+		if(FLAC__metadata_chain_write(chain, /*use_padding=*/false, /*preserve_file_stats=*/false))
+			return die_c_("mismatched write should have failed", FLAC__metadata_chain_status(chain));
+		if(FLAC__metadata_chain_status(chain) != FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH)
+			return die_c_("expected FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH", FLAC__metadata_chain_status(chain));
+		printf("  OK: FLAC__metadata_chain_write() returned false,FLAC__METADATA_CHAIN_STATUS_READ_WRITE_MISMATCH like it should\n");
+	}
+
+	printf("read chain (callback-based)\n");
+	{
+		FILE *file = flac_fopen(flacfilename(is_ogg), "rb");
+		if(0 == file)
+			return die_("opening file");
+		if(!FLAC__metadata_chain_read_with_callbacks(chain, (FLAC__IOHandle)file, callbacks)) {
+			fclose(file);
+			return die_c_("reading chain", FLAC__metadata_chain_status(chain));
+		}
+		fclose(file);
+	}
+
+	printf("testing FLAC__metadata_chain_check_if_tempfile_needed()... ");
+
+	if(!FLAC__metadata_chain_check_if_tempfile_needed(chain, /*use_padding=*/false))
+		printf("OK: FLAC__metadata_chain_check_if_tempfile_needed() returned false like it should\n");
+	else
+		return die_("FLAC__metadata_chain_check_if_tempfile_needed() returned true but shouldn't have");
+
+	printf("write chain with wrong method FLAC__metadata_chain_write_with_callbacks_and_tempfile()\n");
+	{
+		if(FLAC__metadata_chain_write_with_callbacks_and_tempfile(chain, /*use_padding=*/false, 0, callbacks, 0, callbacks))
+			return die_c_("mismatched write should have failed", FLAC__metadata_chain_status(chain));
+		if(FLAC__metadata_chain_status(chain) != FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL)
+			return die_c_("expected FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL", FLAC__metadata_chain_status(chain));
+		printf("  OK: FLAC__metadata_chain_write_with_callbacks_and_tempfile() returned false,FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL like it should\n");
+	}
+
+	printf("read chain (callback-based)\n");
+	{
+		FILE *file = flac_fopen(flacfilename(is_ogg), "rb");
+		if(0 == file)
+			return die_("opening file");
+		if(!FLAC__metadata_chain_read_with_callbacks(chain, (FLAC__IOHandle)file, callbacks)) {
+			fclose(file);
+			return die_c_("reading chain", FLAC__metadata_chain_status(chain));
+		}
+		fclose(file);
+	}
+
+	printf("create iterator\n");
+	if(0 == (iterator = FLAC__metadata_iterator_new()))
+		return die_("allocating memory for iterator");
+
+	FLAC__metadata_iterator_init(iterator, chain);
+
+	printf("[S]VP\tnext\n");
+	if(!FLAC__metadata_iterator_next(iterator))
+		return die_("iterator ended early\n");
+
+	printf("S[V]P\tdelete VORBIS_COMMENT, write\n");
+	if(!FLAC__metadata_iterator_delete_block(iterator, /*replace_with_padding=*/false))
+		return die_c_("block delete failed\n", FLAC__metadata_chain_status(chain));
+
+	printf("testing FLAC__metadata_chain_check_if_tempfile_needed()... ");
+
+	if(FLAC__metadata_chain_check_if_tempfile_needed(chain, /*use_padding=*/false))
+		printf("OK: FLAC__metadata_chain_check_if_tempfile_needed() returned true like it should\n");
+	else
+		return die_("FLAC__metadata_chain_check_if_tempfile_needed() returned false but shouldn't have");
+
+	printf("write chain with wrong method FLAC__metadata_chain_write_with_callbacks()\n");
+	{
+		if(FLAC__metadata_chain_write_with_callbacks(chain, /*use_padding=*/false, 0, callbacks))
+			return die_c_("mismatched write should have failed", FLAC__metadata_chain_status(chain));
+		if(FLAC__metadata_chain_status(chain) != FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL)
+			return die_c_("expected FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL", FLAC__metadata_chain_status(chain));
+		printf("  OK: FLAC__metadata_chain_write_with_callbacks() returned false,FLAC__METADATA_CHAIN_STATUS_WRONG_WRITE_CALL like it should\n");
+	}
+
+	printf("delete iterator\n");
+
+	FLAC__metadata_iterator_delete(iterator);
+
+	printf("delete chain\n");
+
+	FLAC__metadata_chain_delete(chain);
+
+	if(!remove_file_(flacfilename(is_ogg)))
+		return false;
+
+	return true;
+}
+
+FLAC__bool test_metadata_file_manipulation(void)
+{
+	printf("\n+++ libFLAC unit test: metadata manipulation\n\n");
+
+	our_metadata_.num_blocks = 0;
+
+	if(!test_level_0_())
+		return false;
+
+	if(!test_level_1_())
+		return false;
+
+	if(!test_level_2_(/*filename_based=*/true, /*is_ogg=*/false)) /* filename-based */
+		return false;
+	if(!test_level_2_(/*filename_based=*/false, /*is_ogg=*/false)) /* callback-based */
+		return false;
+	if(!test_level_2_misc_(/*is_ogg=*/false))
+		return false;
+
+	if(FLAC_API_SUPPORTS_OGG_FLAC) {
+		if(!test_level_2_(/*filename_based=*/true, /*is_ogg=*/true)) /* filename-based */
+			return false;
+		if(!test_level_2_(/*filename_based=*/false, /*is_ogg=*/true)) /* callback-based */
+			return false;
+#if 0
+		/* when ogg flac write is supported, will have to add this: */
+		if(!test_level_2_misc_(/*is_ogg=*/true))
+			return false;
+#endif
+	}
+
+	return true;
+}