comparison src/libsndfile-1.0.27/tests/string_test.c @ 125:cd6cdf86811e

Current libsndfile source

+/*
+** Copyright (C) 2003-2016 Erik de Castro Lopo <[e-mail]>
+**
+** 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+*/
+
+#include "sfconfig.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+#include <inttypes.h>
+
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include	<sndfile.h>
+
+#include	"utils.h"
+
+#define	BUFFER_LEN			(1 << 10)
+#define LOG_BUFFER_SIZE		1024
+
+static void	string_start_test (const char *filename, int typemajor) ;
+static void	string_start_end_test (const char *filename, int typemajor) ;
+static void	string_multi_set_test (const char *filename, int typemajor) ;
+static void	string_rdwr_test (const char *filename, int typemajor) ;
+static void	string_short_rdwr_test (const char *filename, int typemajor) ;
+static void	string_rdwr_grow_test (const char *filename, int typemajor) ;
+static void	string_header_update (const char *filename, int typemajor) ;
+
+static void	software_string_test (const char *filename) ;
+
+static int str_count (const char * haystack, const char * needle) ;
+
+int
+main (int argc, char *argv [])
+{	int		do_all = 0 ;
+	int		test_count = 0 ;
+
+	if (argc != 2)
+	{	printf ("Usage : %s <test>\n", argv [0]) ;
+		printf ("    Where <test> is one of the following:\n") ;
+		printf ("           wav  - test adding strings to WAV files\n") ;
+		printf ("           aiff - test adding strings to AIFF files\n") ;
+		printf ("           flac - test adding strings to FLAC files\n") ;
+		printf ("           ogg  - test adding strings to OGG files\n") ;
+		printf ("           all  - perform all tests\n") ;
+		exit (1) ;
+		} ;
+
+	do_all = ! strcmp (argv [1], "all") ;
+
+	if (do_all || ! strcmp (argv [1], "wav"))
+	{	string_start_end_test ("strings.wav", SF_FORMAT_WAV) ;
+		string_multi_set_test ("multi.wav", SF_FORMAT_WAV) ;
+		string_rdwr_test ("rdwr.wav", SF_FORMAT_WAV) ;
+		string_short_rdwr_test ("short_rdwr.wav", SF_FORMAT_WAV) ;
+		string_rdwr_grow_test ("rdwr_grow.wav", SF_FORMAT_WAV) ;
+		string_header_update ("header_update.wav", SF_FORMAT_WAV) ;
+
+		string_start_end_test ("strings.wavex", SF_FORMAT_WAVEX) ;
+		string_multi_set_test ("multi.wavex", SF_FORMAT_WAVEX) ;
+		string_rdwr_test ("rdwr.wavex", SF_FORMAT_WAVEX) ;
+		string_short_rdwr_test ("short_rdwr.wavex", SF_FORMAT_WAVEX) ;
+
+		string_start_end_test ("strings.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV) ;
+		string_multi_set_test ("multi.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV) ;
+		string_rdwr_test ("rdwr.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV) ;
+		string_short_rdwr_test ("short_rdwr.rifx", SF_ENDIAN_BIG | SF_FORMAT_WAV) ;
+
+		software_string_test ("software_string.wav") ;
+		test_count++ ;
+		} ;
+
+	if (do_all || ! strcmp (argv [1], "aiff"))
+	{	string_start_test ("strings.aiff", SF_FORMAT_AIFF) ;
+		string_start_end_test ("strings.aiff", SF_FORMAT_AIFF) ;
+		/*
+		TODO : Fix src/aiff.c so these tests pass.
+		string_multi_set_test ("multi.aiff", SF_FORMAT_AIFF) ;
+		string_rdwr_test ("rdwr.aiff", SF_FORMAT_AIFF) ;
+		string_short_rdwr_test ("short_rdwr.aiff", SF_FORMAT_AIFF) ;
+		string_rdwr_grow_test ("rdwr_grow.aiff", SF_FORMAT_AIFF) ;
+		string_header_update ("header_update.aiff", SF_FORMAT_AIFF) ;
+		*/
+
+		test_count++ ;
+		} ;
+
+	if (do_all || ! strcmp (argv [1], "flac"))
+	{	if (HAVE_EXTERNAL_XIPH_LIBS)
+			string_start_test ("strings.flac", SF_FORMAT_FLAC) ;
+		else
+			puts ("    No FLAC tests because FLAC support was not compiled in.") ;
+		test_count++ ;
+		} ;
+
+	if (do_all || ! strcmp (argv [1], "ogg"))
+	{	if (HAVE_EXTERNAL_XIPH_LIBS)
+			string_start_test ("vorbis.oga", SF_FORMAT_OGG) ;
+		else
+			puts ("    No Ogg/Vorbis tests because Ogg/Vorbis support was not compiled in.") ;
+		test_count++ ;
+		} ;
+
+	if (do_all || ! strcmp (argv [1], "caf"))
+	{	string_start_test ("strings.caf", SF_FORMAT_CAF) ;
+		string_start_end_test ("strings.caf", SF_FORMAT_CAF) ;
+		string_multi_set_test ("multi.caf", SF_FORMAT_CAF) ;
+		/*
+		TODO : Fix src/caf.c so these tests pass.
+		string_rdwr_test ("rdwr.caf", SF_FORMAT_CAF) ;
+		string_short_rdwr_test ("short_rdwr.caf", SF_FORMAT_CAF) ;
+		string_header_update ("header_update.caf", SF_FORMAT_CAF) ;
+		*/
+		test_count++ ;
+		} ;
+
+	if (do_all || ! strcmp (argv [1], "rf64"))
+	{	string_start_test ("strings.rf64", SF_FORMAT_RF64) ;
+		string_start_end_test ("strings.rf64", SF_FORMAT_RF64) ;
+		string_multi_set_test ("multi.rf64", SF_FORMAT_RF64) ;
+		/*
+		TODO : Fix src/rf64.c so these tests pass.
+		string_rdwr_test ("rdwr.rf64", SF_FORMAT_RF64) ;
+		string_short_rdwr_test ("short_rdwr.rf64", SF_FORMAT_RF64) ;
+		string_header_update ("header_update.rf64", SF_FORMAT_RF64) ;
+		*/
+		test_count++ ;
+		} ;
+
+	if (do_all || ! strcmp (argv [1], "w64"))
+	{	puts ("\n\n     **** String test not working yet for W64 format. ****\n") ;
+		/*
+		string_start_test ("strings.w64", SF_FORMAT_W64) ;
+		string_start_end_test ("strings.w64", SF_FORMAT_W64) ;
+		string_multi_set_test ("multi.w64", SF_FORMAT_W64) ;
+		string_rdwr_test ("rdwr.w64", SF_FORMAT_W64) ;
+		string_short_rdwr_test ("short_rdwr.w64", SF_FORMAT_W64) ;
+		string_header_update ("header_update.w64", SF_FORMAT_W64) ;
+		*/
+		test_count++ ;
+		} ;
+
+	if (test_count == 0)
+	{	printf ("Mono : ************************************\n") ;
+		printf ("Mono : *  No '%s' test defined.\n", argv [1]) ;
+		printf ("Mono : ************************************\n") ;
+		return 1 ;
+		} ;
+
+	return 0 ;
+} /* main */
+
+
+/*============================================================================================
+**	Here are the test functions.
+*/
+
+static const char
+	software	[]	= "software (libsndfile-X.Y.Z)",
+	artist		[]	= "The Artist",
+	copyright	[]	= "Copyright (c) 2001 Artist",
+	comment		[]	= "Comment goes here!!!",
+	date		[]	= "2001/01/27",
+	album		[]	= "The Album",
+	license		[]	= "The license",
+	title		[]	= "This is the title",
+	long_title	[]	= "This is a very long and very boring title for this file",
+	long_artist	[]	= "The artist who kept on changing its name",
+	genre		[]	= "The genre",
+	trackno		[]	= "Track three" ;
+
+
+static	short	data_out [BUFFER_LEN] ;
+
+static void
+string_start_end_test (const char *filename, int typemajor)
+{	const char	*cptr ;
+	SNDFILE		*file ;
+	SF_INFO		sfinfo ;
+	int			errors = 0 ;
+
+	print_test_name ("string_start_end_test", filename) ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.samplerate	= 44100 ;
+	sfinfo.channels		= 1 ;
+	sfinfo.frames		= 0 ;
+	sfinfo.format		= typemajor | SF_FORMAT_PCM_16 ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+
+	/* Write stuff at start of file. */
+	sf_set_string (file, SF_STR_TITLE, filename) ;
+	sf_set_string (file, SF_STR_SOFTWARE, software) ;
+	sf_set_string (file, SF_STR_ARTIST, artist) ;
+	sf_set_string (file, SF_STR_GENRE, genre) ;
+	sf_set_string (file, SF_STR_TRACKNUMBER, trackno) ;
+
+	/* Write data to file. */
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+	test_seek_or_die (file, 0, SEEK_SET, 0, sfinfo.channels, __LINE__) ;
+
+	/* Write more stuff at end of file. */
+	sf_set_string (file, SF_STR_COPYRIGHT, copyright) ;
+	sf_set_string (file, SF_STR_COMMENT, comment) ;
+	sf_set_string (file, SF_STR_DATE, date) ;
+	sf_set_string (file, SF_STR_ALBUM, album) ;
+	sf_set_string (file, SF_STR_LICENSE, license) ;
+
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_TRUE, __LINE__) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	if (sfinfo.frames != BUFFER_LEN)
+	{	printf ("***** Bad frame count %d (should be %d)\n\n", (int) sfinfo.frames, BUFFER_LEN) ;
+		errors ++ ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_TITLE) ;
+	if (cptr == NULL || strcmp (filename, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad filename  : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_COPYRIGHT) ;
+	if (cptr == NULL || strcmp (copyright, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad copyright : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_SOFTWARE) ;
+	if (cptr == NULL || strstr (cptr, software) != cptr)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad software  : %s\n", cptr) ;
+		} ;
+
+	if (str_count (cptr, "libsndfile") != 1)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad software  : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_ARTIST) ;
+	if (cptr == NULL || strcmp (artist, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad artist    : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_COMMENT) ;
+	if (cptr == NULL || strcmp (comment, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad comment   : %s\n", cptr) ;
+		} ;
+
+	if (typemajor != SF_FORMAT_AIFF)
+	{	cptr = sf_get_string (file, SF_STR_DATE) ;
+		if (cptr == NULL || strcmp (date, cptr) != 0)
+		{	if (errors++ == 0)
+				puts ("\n") ;
+			printf ("    Bad date      : %s\n", cptr) ;
+			} ;
+
+		cptr = sf_get_string (file, SF_STR_GENRE) ;
+		if (cptr == NULL || strcmp (genre, cptr) != 0)
+		{	if (errors++ == 0)
+				puts ("\n") ;
+			printf ("    Bad genre     : %s\n", cptr) ;
+			} ;
+		} ;
+
+	switch (typemajor)
+	{	case SF_FORMAT_AIFF :
+		case SF_FORMAT_WAV :
+		case SF_FORMAT_WAVEX :
+		case SF_ENDIAN_BIG | SF_FORMAT_WAV :
+		case SF_FORMAT_RF64 :
+			/* These formats do not support the following. */
+			break ;
+
+		default :
+			cptr = sf_get_string (file, SF_STR_ALBUM) ;
+			if (cptr == NULL || strcmp (album, cptr) != 0)
+			{	if (errors++ == 0)
+					puts ("\n") ;
+				printf ("    Bad album     : %s\n", cptr) ;
+				} ;
+
+			cptr = sf_get_string (file, SF_STR_LICENSE) ;
+			if (cptr == NULL || strcmp (license, cptr) != 0)
+			{	if (errors++ == 0)
+					puts ("\n") ;
+				printf ("    Bad license   : %s\n", cptr) ;
+				} ;
+
+			cptr = sf_get_string (file, SF_STR_TRACKNUMBER) ;
+			if (cptr == NULL || strcmp (trackno, cptr) != 0)
+			{	if (errors++ == 0)
+					puts ("\n") ;
+				printf ("    Bad track no. : %s\n", cptr) ;
+				} ;
+			break ;
+		} ;
+
+	if (errors > 0)
+	{	printf ("\n*** Error count : %d ***\n\n", errors) ;
+		dump_log_buffer (file) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+	unlink (filename) ;
+
+	puts ("ok") ;
+} /* string_start_end_test */
+
+static void
+string_start_test (const char *filename, int typemajor)
+{	const char	*cptr ;
+	SNDFILE		*file ;
+	SF_INFO		sfinfo ;
+	int			errors = 0 ;
+
+	print_test_name ("string_start_test", filename) ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.samplerate	= 44100 ;
+	sfinfo.channels		= 1 ;
+	sfinfo.frames		= 0 ;
+
+	switch (typemajor)
+	{	case SF_FORMAT_OGG :
+			sfinfo.format = typemajor | SF_FORMAT_VORBIS ;
+			break ;
+
+		default :
+			sfinfo.format = typemajor | SF_FORMAT_PCM_16 ;
+			break ;
+		} ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+
+	/* Write stuff at start of file. */
+	sf_set_string (file, SF_STR_TITLE, filename) ;
+	sf_set_string (file, SF_STR_SOFTWARE, software) ;
+	sf_set_string (file, SF_STR_ARTIST, artist) ;
+	sf_set_string (file, SF_STR_COPYRIGHT, copyright) ;
+	sf_set_string (file, SF_STR_COMMENT, comment) ;
+	sf_set_string (file, SF_STR_DATE, date) ;
+	sf_set_string (file, SF_STR_ALBUM, album) ;
+	sf_set_string (file, SF_STR_LICENSE, license) ;
+
+	/* Write data to file. */
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_TRUE, __LINE__) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	if (sfinfo.frames != BUFFER_LEN)
+	{	printf ("***** Bad frame count %d (should be %d)\n\n", (int) sfinfo.frames, BUFFER_LEN) ;
+		errors ++ ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_TITLE) ;
+	if (cptr == NULL || strcmp (filename, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad filename  : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_COPYRIGHT) ;
+	if (cptr == NULL || strcmp (copyright, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad copyright : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_SOFTWARE) ;
+	if (cptr == NULL || strstr (cptr, software) != cptr)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad software  : %s\n", cptr) ;
+		} ;
+
+	if (cptr && str_count (cptr, "libsndfile") != 1)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad software  : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_ARTIST) ;
+	if (cptr == NULL || strcmp (artist, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad artist    : %s\n", cptr) ;
+		} ;
+
+	cptr = sf_get_string (file, SF_STR_COMMENT) ;
+	if (cptr == NULL || strcmp (comment, cptr) != 0)
+	{	if (errors++ == 0)
+			puts ("\n") ;
+		printf ("    Bad comment   : %s\n", cptr) ;
+		} ;
+
+	if (typemajor != SF_FORMAT_AIFF)
+	{	cptr = sf_get_string (file, SF_STR_DATE) ;
+		if (cptr == NULL || strcmp (date, cptr) != 0)
+		{	if (errors++ == 0)
+				puts ("\n") ;
+			printf ("    Bad date      : %s\n", cptr) ;
+			} ;
+		} ;
+
+	if (typemajor != SF_FORMAT_WAV && typemajor != SF_FORMAT_AIFF)
+	{	cptr = sf_get_string (file, SF_STR_ALBUM) ;
+		if (cptr == NULL || strcmp (album, cptr) != 0)
+		{	if (errors++ == 0)
+				puts ("\n") ;
+			printf ("    Bad album     : %s\n", cptr) ;
+			} ;
+		} ;
+
+	if (typemajor != SF_FORMAT_WAV && typemajor != SF_FORMAT_AIFF && typemajor != SF_FORMAT_RF64)
+	{	cptr = sf_get_string (file, SF_STR_LICENSE) ;
+		if (cptr == NULL || strcmp (license, cptr) != 0)
+		{	if (errors++ == 0)
+				puts ("\n") ;
+			printf ("    Bad license   : %s\n", cptr) ;
+			} ;
+		} ;
+
+	if (errors > 0)
+	{	printf ("\n*** Error count : %d ***\n\n", errors) ;
+		dump_log_buffer (file) ;
+		exit (1) ;
+		} ;
+
+	sf_close (file) ;
+	unlink (filename) ;
+
+	puts ("ok") ;
+} /* string_start_test */
+
+static void
+string_multi_set_test (const char *filename, int typemajor)
+{	static const char
+		new_software	[]	= "new software (libsndfile-X.Y.Z)",
+		new_copyright	[]	= "Copyright (c) 2001 New Artist",
+		new_artist		[]	= "The New Artist",
+		new_title		[]	= "This is the new title" ;
+
+	static char buffer [2048] ;
+	SNDFILE		*file ;
+	SF_INFO		sfinfo ;
+	int			count ;
+
+	print_test_name (__func__, filename) ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.format		= typemajor | SF_FORMAT_PCM_16 ;
+	sfinfo.samplerate	= 44100 ;
+	sfinfo.channels		= 1 ;
+	sfinfo.frames		= 0 ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+
+	/* Write stuff at start of file. */
+	sf_set_string (file, SF_STR_TITLE, title) ;
+	sf_set_string (file, SF_STR_SOFTWARE, software) ;
+	sf_set_string (file, SF_STR_ARTIST, artist) ;
+
+	/* Write data to file. */
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+
+	/* Write it all again. */
+
+	sf_set_string (file, SF_STR_TITLE, new_title) ;
+	sf_set_string (file, SF_STR_SOFTWARE, new_software) ;
+	sf_set_string (file, SF_STR_ARTIST, new_artist) ;
+
+	sf_set_string (file, SF_STR_COPYRIGHT, copyright) ;
+	sf_set_string (file, SF_STR_COMMENT, comment) ;
+	sf_set_string (file, SF_STR_DATE, date) ;
+	sf_set_string (file, SF_STR_ALBUM, album) ;
+	sf_set_string (file, SF_STR_LICENSE, license) ;
+	sf_set_string (file, SF_STR_COPYRIGHT, new_copyright) ;
+	sf_set_string (file, SF_STR_COMMENT, comment) ;
+	sf_set_string (file, SF_STR_DATE, date) ;
+	sf_set_string (file, SF_STR_ALBUM, album) ;
+	sf_set_string (file, SF_STR_LICENSE, license) ;
+
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_TRUE, __LINE__) ;
+	sf_command	(file, SFC_GET_LOG_INFO, buffer, sizeof (buffer)) ;
+	sf_close (file) ;
+
+	count = str_count (buffer, new_title) ;
+	exit_if_true (count < 1, "\n\nLine %d : Could not find new_title in :\n%s\n", __LINE__, buffer) ;
+	exit_if_true (count > 1, "\n\nLine %d : new_title appears %d times in :\n\n%s\n", __LINE__, count, buffer) ;
+
+	count = str_count (buffer, software) ;
+	exit_if_true (count < 1, "\n\nLine %d : Could not find new_software in :\n%s\n", __LINE__, buffer) ;
+	exit_if_true (count > 1, "\n\nLine %d : new_software appears %d times in :\n\n%s\n", __LINE__, count, buffer) ;
+
+	count = str_count (buffer, new_artist) ;
+	exit_if_true (count < 1, "\n\nLine %d : Could not find new_artist in :\n%s\n", __LINE__, buffer) ;
+	exit_if_true (count > 1, "\n\nLine %d : new_artist appears %d times in :\n\n%s\n", __LINE__, count, buffer) ;
+
+	count = str_count (buffer, new_copyright) ;
+	exit_if_true (count < 1, "\n\nLine %d : Could not find new_copyright in :\n%s\n", __LINE__, buffer) ;
+	exit_if_true (count > 1, "\n\nLine %d : new_copyright appears %d times in :\n\n%s\n", __LINE__, count, buffer) ;
+
+	unlink (filename) ;
+
+	puts ("ok") ;
+} /* string_multi_set_test */
+
+static void
+string_rdwr_test (const char *filename, int typemajor)
+{	SNDFILE *file ;
+	SF_INFO sfinfo ;
+	sf_count_t frames ;
+	const char * str ;
+
+	print_test_name (__func__, filename) ;
+	create_short_sndfile (filename, typemajor | SF_FORMAT_PCM_16, 2) ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_FALSE, __LINE__) ;
+	frames = sfinfo.frames ;
+	sf_set_string (file, SF_STR_TITLE, title) ;
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+	exit_if_true (frames != sfinfo.frames, "\n\nLine %d : Frame count %" PRId64 " should be %" PRId64 ".\n", __LINE__, sfinfo.frames, frames) ;
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, title) != 0, "\n\nLine %d : SF_STR_TITLE doesn't match what was written.\n", __LINE__) ;
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_FALSE, __LINE__) ;
+	frames = sfinfo.frames ;
+	sf_set_string (file, SF_STR_TITLE, title) ;
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_FALSE, __LINE__) ;
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	sf_set_string (file, SF_STR_ARTIST, artist) ;
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	str = sf_get_string (file, SF_STR_ARTIST) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_ARTIST string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, artist) != 0, "\n\nLine %d : SF_STR_ARTIST doesn't match what was written.\n", __LINE__) ;
+
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, title) != 0, "\n\nLine %d : SF_STR_TITLE doesn't match what was written.\n", __LINE__) ;
+
+	exit_if_true (frames != sfinfo.frames, "\n\nLine %d : Frame count %" PRId64 " should be %" PRId64 ".\n", __LINE__, sfinfo.frames, frames) ;
+
+	sf_close (file) ;
+	unlink (filename) ;
+
+	puts ("ok") ;
+} /* string_rdwr_test */
+
+static void
+string_short_rdwr_test (const char *filename, int typemajor)
+{	SNDFILE *file ;
+	SF_INFO sfinfo ;
+	sf_count_t frames = BUFFER_LEN ;
+	const char * str ;
+
+	print_test_name (__func__, filename) ;
+
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.format		= typemajor | SF_FORMAT_PCM_16 ;
+	sfinfo.samplerate	= 44100 ;
+	sfinfo.channels		= 1 ;
+	sfinfo.frames		= 0 ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_FALSE, __LINE__) ;
+
+	/* Write data to file. */
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+
+	sf_set_string (file, SF_STR_TITLE, long_title) ;
+	sf_set_string (file, SF_STR_ARTIST, long_artist) ;
+	sf_close (file) ;
+
+	/* Open the file RDWR. */
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_FALSE, __LINE__) ;
+	exit_if_true (frames != sfinfo.frames, "\n\nLine %d : Frame count %" PRId64 " should be %" PRId64 ".\n", __LINE__, sfinfo.frames, frames) ;
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, long_title) != 0, "\n\nLine %d : SF_STR_TITLE doesn't match what was written.\n", __LINE__) ;
+	str = sf_get_string (file, SF_STR_ARTIST) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, long_artist) != 0, "\n\nLine %d : SF_STR_ARTIST doesn't match what was written.\n", __LINE__) ;
+
+	/* Change title and artist. */
+	sf_set_string (file, SF_STR_TITLE, title) ;
+	sf_set_string (file, SF_STR_ARTIST, artist) ;
+
+	sf_close (file) ;
+
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_FALSE, __LINE__) ;
+
+	check_log_buffer_or_die (file, __LINE__) ;
+
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, title) != 0, "\n\nLine %d : SF_STR_TITLE doesn't match what was written.\n", __LINE__) ;
+
+	str = sf_get_string (file, SF_STR_ARTIST) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_ARTIST string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, artist) != 0, "\n\nLine %d : SF_STR_ARTIST doesn't match what was written.\n", __LINE__) ;
+
+	sf_close (file) ;
+	unlink (filename) ;
+
+	puts ("ok") ;
+} /* string_short_rdwr_test */
+
+static int
+str_count (const char * haystack, const char * needle)
+{	int count = 0 ;
+
+	while ((haystack = strstr (haystack, needle)) != NULL)
+	{	count ++ ;
+		haystack ++ ;
+		} ;
+
+	return count ;
+} /* str_count */
+
+#define MIN(a, b)	((a) < (b) ? (a) : (b))
+
+static void
+software_string_test (const char *filename)
+{	size_t k ;
+
+	print_test_name (__func__, filename) ;
+
+	for (k = 0 ; k < 50 ; k++)
+	{	const char *result ;
+		char sfname [64] = "" ;
+		SNDFILE *file ;
+		SF_INFO info ;
+
+		sf_info_setup (&info, SF_FORMAT_WAV | SF_FORMAT_PCM_16, 44100, 1) ;
+		file = test_open_file_or_die (filename, SFM_WRITE, &info, SF_TRUE, __LINE__) ;
+
+		snprintf (sfname, MIN (k, sizeof (sfname)), "%s", "abcdefghijklmnopqrestvwxyz0123456789abcdefghijklmnopqrestvwxyz") ;
+
+		exit_if_true (sf_set_string (file, SF_STR_SOFTWARE, sfname),
+			"\n\nLine %d : sf_set_string (f, SF_STR_SOFTWARE, '%s') failed : %s\n", __LINE__, sfname, sf_strerror (file)) ;
+
+		sf_close (file) ;
+
+		file = test_open_file_or_die (filename, SFM_READ, &info, SF_TRUE, __LINE__) ;
+		result = sf_get_string (file, SF_STR_SOFTWARE) ;
+
+		exit_if_true (result == NULL, "\n\nLine %d : sf_get_string (file, SF_STR_SOFTWARE) returned NULL.\n\n", __LINE__) ;
+
+		exit_if_true (strstr (result, sfname) != result,
+			"\n\nLine %d : Can't fine string '%s' in '%s'\n\n", __LINE__, sfname, result) ;
+		sf_close (file) ;
+		} ;
+
+	unlink (filename) ;
+	puts ("ok") ;
+} /* software_string_test */
+
+
+static void
+string_rdwr_grow_test (const char *filename, int typemajor)
+{	SNDFILE *file ;
+	SF_INFO sfinfo ;
+	sf_count_t frames ;
+	const char * str ;
+
+	print_test_name (__func__, filename) ;
+
+	/* Create a file that contains some strings. Then open the file in RDWR mode and
+		 grow the file by writing more audio data to it. Check that the audio data has
+		 been added to the file, and that the strings are still there. */
+
+	/* Create a short file that contains a string. */
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.samplerate	= 44100 ;
+	sfinfo.channels		= 2 ;
+	sfinfo.frames		= 0 ;
+	sfinfo.format		= typemajor | SF_FORMAT_PCM_16 ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+	/* Write data to file. */
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+
+	/* Write some strings at end of file. */
+	sf_set_string (file, SF_STR_TITLE , title) ;
+	sf_set_string (file, SF_STR_COMMENT, comment) ;
+	sf_close (file) ;
+
+
+	/* Now open file again in SFM_RDWR mode and write more audio data to it. */
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_TRUE, __LINE__) ;
+	/* Write more data to file.  */
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+	sf_close (file) ;
+
+
+	/* Now open file again. It should now contain two BUFFER_LEN's worth of frames and the strings. */
+	frames = 2 * BUFFER_LEN / sfinfo.channels ;
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_TRUE, __LINE__) ;
+	exit_if_true (frames != sfinfo.frames, "\n\nLine %d : Frame count %" PRId64 " should be %" PRId64 ".\n", __LINE__, sfinfo.frames, frames) ;
+
+	/* Check the strings */
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, title) != 0, "\n\nLine %d : SF_STR_TITLE doesn't match what was written.\n", __LINE__) ;
+
+	str = sf_get_string (file, SF_STR_COMMENT) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_COMMENT string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, comment) != 0, "\n\nLine %d : SF_STR_COMMENT doesn't match what was written.\n", __LINE__) ;
+
+	sf_close (file) ;
+	unlink (filename) ;
+
+	puts ("ok") ;
+} /* string_rdwr_grow_test */
+
+static void
+string_header_update (const char *filename, int typemajor)
+{	SNDFILE *file , *file1 ;
+	SF_INFO sfinfo , sfinfo1 ;
+	sf_count_t frames ;
+	const char * str ;
+	const int GROW_BUFFER_AMOUNT = 4 ; /* this should be less than half the size of the string header */
+
+	print_test_name (__func__, filename) ;
+
+	/* Create a short file. */
+	memset (&sfinfo, 0, sizeof (sfinfo)) ;
+	sfinfo.samplerate	= 44100 ;
+	sfinfo.channels		= 2 ;
+	sfinfo.frames		= 0 ;
+	sfinfo.format		= typemajor | SF_FORMAT_PCM_16 ;
+
+	file = test_open_file_or_die (filename, SFM_WRITE, &sfinfo, SF_TRUE, __LINE__) ;
+	test_write_short_or_die (file, 0, data_out, BUFFER_LEN, __LINE__) ;
+	sf_set_string (file, SF_STR_TITLE, long_title) ;
+	sf_close (file) ;
+
+
+	/* Check that SFC_UPDATE_HEADER_NOW correctly calculates datalength. */
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_TRUE, __LINE__) ;
+	/* Write a very small amount of new audio data that doesn't completely overwrite the existing header. */
+	test_write_short_or_die (file, 0, data_out, GROW_BUFFER_AMOUNT, __LINE__) ;
+
+	/* Update the header without closing the file. */
+	sf_command (file, SFC_UPDATE_HEADER_NOW, NULL, 0) ;
+
+	/* The file should now contain BUFFER_LEN + GROW_BUFFER_AMOUNT frames.
+		Open a second handle to the file and check the reported length. */
+	memset (&sfinfo1, 0, sizeof (sfinfo1)) ;
+	file1 = test_open_file_or_die (filename, SFM_READ, &sfinfo1, SF_TRUE, __LINE__) ;
+
+	frames = (BUFFER_LEN + GROW_BUFFER_AMOUNT) / sfinfo.channels ;
+	exit_if_true (frames != sfinfo1.frames, "\n\nLine %d : Frame count %" PRId64 " should be %" PRId64 ".\n", __LINE__, sfinfo1.frames, frames) ;
+
+	/* The strings are probably not readable by the second soundfile handle because write_tailer has not yet been called.
+		It's a design decision whether SFC_UPDATE_HEADER_NOW should write the tailer. I think it's fine that it doesn't.  */
+
+	sf_close (file1) ;
+	sf_close (file) ;
+
+
+	/* Check that sf_close correctly calculates datalength. */
+	file = test_open_file_or_die (filename, SFM_RDWR, &sfinfo, SF_TRUE, __LINE__) ;
+	/* Write a very small amount of new audio data that doesn't completely overwrite the existing header. */
+	test_write_short_or_die (file, 0, data_out, GROW_BUFFER_AMOUNT, __LINE__) ;
+	sf_close (file) ;
+
+
+	/* Open file again and verify data and string. */
+	file = test_open_file_or_die (filename, SFM_READ, &sfinfo, SF_TRUE, __LINE__) ;
+	frames = (BUFFER_LEN + 2*GROW_BUFFER_AMOUNT) / sfinfo.channels ;
+	exit_if_true (frames != sfinfo.frames, "\n\nLine %d : Frame count %" PRId64 " should be %" PRId64 ".\n", __LINE__, sfinfo.frames, frames) ;
+	str = sf_get_string (file, SF_STR_TITLE) ;
+	exit_if_true (str == NULL, "\n\nLine %d : SF_STR_TITLE string is NULL.\n", __LINE__) ;
+	exit_if_true (strcmp (str, long_title) != 0, "\n\nLine %d : SF_STR_TITLE doesn't match what was written.\n", __LINE__) ;
+	sf_close (file) ;
+	unlink (filename) ;
+	puts ("ok") ;
+} /* string_header_update */