#!/usr/bin/python

# Copyright (C) 2003-2017 Erik de Castro Lopo <erikd@mega-nerd.com>
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in
#       the documentation and/or other materials provided with the
#       distribution.
#     * Neither the author nor the names of any contributors may be used
#       to endorse or promote products derived from this software without
#       specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
# OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
# OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import re, sys

#----------------------------------------------------------------
# These are all of the public functions exported from libsndfile.
#
# Its important not to change the order they are listed in or
# the ordinal values in the second column.

ALL_SYMBOLS = (
	(	"sf_command",	 		1	),
	(	"sf_open",				2	),
	(	"sf_close",				3	),
	(	"sf_seek",				4	),
	(	"sf_error",				7	),
	(	"sf_perror",			8	),
	(	"sf_error_str",			9	),
	(	"sf_error_number",		10	),
	(	"sf_format_check",		11	),
	(	"sf_read_raw",			16	),
	(	"sf_readf_short",		17	),
	(	"sf_readf_int",			18	),
	(	"sf_readf_float",		19	),
	(	"sf_readf_double",		20	),
	(	"sf_read_short",		21	),
	(	"sf_read_int",			22	),
	(	"sf_read_float",		23	),
	(	"sf_read_double",		24	),
	(	"sf_write_raw",			32	),
	(	"sf_writef_short",		33	),
	(	"sf_writef_int",		34	),
	(	"sf_writef_float",		35	),
	(	"sf_writef_double",		36	),
	(	"sf_write_short",		37	),
	(	"sf_write_int",			38	),
	(	"sf_write_float",		39	),
	(	"sf_write_double",		40	),
	(	"sf_strerror",			50	),
	(	"sf_get_string",		60	),
	(	"sf_set_string",		61	),
	(	"sf_version_string",	68	),
	(	"sf_open_fd",			70	),
	(	"sf_wchar_open",		71  ),
	(	"sf_open_virtual",		80	),
	(	"sf_write_sync",		90	),
	(	"sf_set_chunk",			100	),
	(	"sf_get_chunk_size",	101 ),
	(	"sf_get_chunk_data",	102 ),
	(	"sf_get_chunk_iterator",	103 ),
	(	"sf_next_chunk_iterator",	104 ),
	(	"sf_current_byterate",	110 )
	)

#-------------------------------------------------------------------------------

def linux_symbols (progname, version):
	print ("# Auto-generated by %s\n" %progname)
	print ("libsndfile.so.%s" % version)
	print ("{")
	print ("  global:")
	for name, ordinal in ALL_SYMBOLS:
		if  name == "sf_wchar_open":
			continue
		print ("    %s ;" % name)
	print ("  local:")
	print ("    * ;")
	print ("} ;")
	sys.stdout.write ("\n")
	return

def darwin_symbols (progname, version):
	print ("# Auto-generated by %s\n" %progname)
	for name, ordinal in ALL_SYMBOLS:
		if  name == "sf_wchar_open":
			continue
		print ("_%s" % name)
	sys.stdout.write ("\n")
	return

def win32_symbols (progname, version, name):
	print ("; Auto-generated by %s\n" %progname)
	print ("EXPORTS\n")
	for name, ordinal in ALL_SYMBOLS:
		print ("%-20s @%s" % (name, ordinal))
	sys.stdout.write ("\n")
	return

def os2_symbols (progname, version, name):
	print ("; Auto-generated by %s\n" %progname)
	print ("LIBRARY %s%s" % (name, re.sub ("\..*", "", version)))
	print ("INITINSTANCE TERMINSTANCE")
	print ("CODE PRELOAD MOVEABLE DISCARDABLE")
	print ("DATA PRELOAD MOVEABLE MULTIPLE NONSHARED")
	print ("EXPORTS\n")
	for name, ordinal in ALL_SYMBOLS:
		if  name == "sf_wchar_open":
			continue
		print ("_%-20s @%s" % (name, ordinal))
	sys.stdout.write ("\n")
	return

def plain_symbols (progname, version, name):
	for name, ordinal in ALL_SYMBOLS:
		print (name)

def no_symbols (os_name):
	sys.stdout.write ("\n")
	print ("No known way of restricting exported symbols on '%s'." % os_name)
	print ("If you know a way, please contact the author.")
	sys.stdout.write ("\n")
	return

#-------------------------------------------------------------------------------

progname = re.sub (".*[\\/]", "", sys.argv [0])

if len (sys.argv) != 3:
	sys.stdout.write ("\n")
	print ("Usage : %s <target OS name> <libsndfile version>." % progname)
	sys.stdout.write ("\n")
	print ("    Currently supported values for target OS are:")
	print ("          linux")
	print ("          darwin     (ie MacOSX)")
	print ("          win32      (ie wintendo)")
	print ("          cygwin     (Cygwin on wintendo)")
	print ("          os2        (OS/2)")
	print ("          plain      (plain list of symbols)")
	sys.stdout.write ("\n")
	sys.exit (1)

os_name = sys.argv [1]
version = re.sub ("\.[a-z0-9]+$", "", sys.argv [2])

if os_name == "linux" or os_name == "gnu" or os_name == "binutils":
	linux_symbols (progname, version)
elif os_name == "darwin":
	darwin_symbols (progname, version)
elif os_name == "win32":
	win32_symbols (progname, version, "libsndfile")
elif os_name == "cygwin":
	win32_symbols (progname, version, "cygsndfile")
elif os_name == "os2":
	os2_symbols (progname, version, "sndfile")
elif os_name == "static":
	plain_symbols (progname, version, "")
else:
	no_symbols (os_name)

sys.exit (0)