Imported from pngmeta-1.10.tarpngmeta_1.10

26 files changed, 3706 insertions, 6 deletions

diff --git a/8859.png b/8859.png
new file mode 100644
index 000000000..7580a7175
--- /dev/null
+++ b/8859.png
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 000000000..e69e3bd83
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,33 @@
+## -*- makefile -*-
+##
+## Process this file with automake to produce Makefile.in
+##
+## $Source: /home/cur/djb1/develop/pngmeta/pngmeta/RCS/Makefile.am,v $
+##
+## $Id: Makefile.am,v 1.5 2000/01/31 14:15:53 djb1 Exp $
+##
+## (C) Copyright 1998, Dave Beckett, University of Kent at Canterbury
+##
+
+INCLUDES=-I$(PNG_INCLUDE) -I$(ZLIB_INCLUDE)
+
+bin_PROGRAMS = pngmeta
+
+AUTOMAKE_OPTIONS=foreign no-dependencies
+
+EXTRA_DIST=test1 test2 test3 test4\
+	   test1.xpt test2.xpt test3.xpt test4.xpt\
+	   8859.png ctzn0g04.png ct1n0g04.png\
+	   pngmeta.1 Makefile.old pngmeta.spec
+
+man_MANS=pngmeta.1
+
+TESTS=test1 test2 test3 test4
+
+test-results: pngmeta
+	./pngmeta -quiet ct1n0g04.png > test1.xpt
+	./pngmeta -soif -quiet ctzn0g04.png > test2.xpt
+	./pngmeta -html -quiet 8859.png > test3.xpt
+	./pngmeta -xrdf ct1n0g04.png > test4.xpt
+
+MAINTAINERCLEANFILES=test1.xpt test2.xpt test3.xpt test4.xpt
diff --git a/Makefile.in b/Makefile.in
new file mode 100644
index 000000000..2837a3847
--- /dev/null
+++ b/Makefile.in
@@ -0,0 +1,357 @@
+# Makefile.in generated automatically by automake 1.2 from Makefile.am
+
+# Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+
+
+SHELL = /bin/sh
+
+srcdir = @srcdir@
+top_srcdir = @top_srcdir@
+VPATH = @srcdir@
+prefix = @prefix@
+exec_prefix = @exec_prefix@
+
+bindir = @bindir@
+sbindir = @sbindir@
+libexecdir = @libexecdir@
+datadir = @datadir@
+sysconfdir = @sysconfdir@
+sharedstatedir = @sharedstatedir@
+localstatedir = @localstatedir@
+libdir = @libdir@
+infodir = @infodir@
+mandir = @mandir@
+includedir = @includedir@
+oldincludedir = /usr/include
+
+DISTDIR =
+
+pkgdatadir = $(datadir)/@PACKAGE@
+pkglibdir = $(libdir)/@PACKAGE@
+pkgincludedir = $(includedir)/@PACKAGE@
+
+top_builddir = .
+
+ACLOCAL = @ACLOCAL@
+AUTOCONF = @AUTOCONF@
+AUTOMAKE = @AUTOMAKE@
+AUTOHEADER = @AUTOHEADER@
+
+INSTALL = @INSTALL@
+INSTALL_PROGRAM = @INSTALL_PROGRAM@
+INSTALL_DATA = @INSTALL_DATA@
+INSTALL_SCRIPT = @INSTALL_SCRIPT@
+transform = @program_transform_name@
+
+NORMAL_INSTALL = :
+PRE_INSTALL = :
+POST_INSTALL = :
+NORMAL_UNINSTALL = :
+PRE_UNINSTALL = :
+POST_UNINSTALL = :
+CC = @CC@
+EXEEXT = @EXEEXT@
+MAKEINFO = @MAKEINFO@
+PACKAGE = @PACKAGE@
+PNG_INCLUDE = @PNG_INCLUDE@
+VERSION = @VERSION@
+ZLIB_INCLUDE = @ZLIB_INCLUDE@
+
+INCLUDES=-I$(PNG_INCLUDE) -I$(ZLIB_INCLUDE)
+
+bin_PROGRAMS = pngmeta
+
+AUTOMAKE_OPTIONS=foreign no-dependencies
+
+EXTRA_DIST=test1 test2 test3 test4\
+	   test1.xpt test2.xpt test3.xpt test4.xpt\
+	   8859.png ctzn0g04.png ct1n0g04.png\
+	   pngmeta.1 Makefile.old pngmeta.spec
+
+man_MANS=pngmeta.1
+
+TESTS=test1 test2 test3 test4
+
+MAINTAINERCLEANFILES=test1.xpt test2.xpt test3.xpt test4.xpt
+ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
+mkinstalldirs = $(SHELL) $(top_srcdir)/mkinstalldirs
+CONFIG_CLEAN_FILES = 
+PROGRAMS =  $(bin_PROGRAMS)
+
+
+DEFS = @DEFS@ -I. -I$(srcdir) 
+CPPFLAGS = @CPPFLAGS@
+LDFLAGS = @LDFLAGS@
+LIBS = @LIBS@
+pngmeta_SOURCES = pngmeta.c
+pngmeta_OBJECTS =  pngmeta.o
+pngmeta_LDADD = $(LDADD)
+pngmeta_LDFLAGS = 
+CFLAGS = @CFLAGS@
+COMPILE = $(CC) $(DEFS) $(INCLUDES) $(CPPFLAGS) $(CFLAGS)
+LINK = $(CC) $(CFLAGS) $(LDFLAGS) -o $@
+MANS = pngmeta.1
+
+NROFF = nroff
+DIST_COMMON =  README Makefile.am Makefile.in NEWS aclocal.m4 configure \
+configure.in install-sh missing mkinstalldirs
+
+
+DISTFILES = $(DIST_COMMON) $(SOURCES) $(HEADERS) $(TEXINFOS) $(EXTRA_DIST)
+
+TAR = gnutar
+GZIP = --best
+SOURCES = pngmeta.c
+OBJECTS = pngmeta.o
+
+default: all
+
+.SUFFIXES:
+.SUFFIXES: .c .o
+$(srcdir)/Makefile.in: $(srcdir)/Makefile.am $(top_srcdir)/configure.in $(ACLOCAL_M4) 
+	cd $(top_srcdir) && $(AUTOMAKE) --foreign Makefile
+
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	cd $(top_builddir) \
+	  && CONFIG_FILES=$@ CONFIG_HEADERS= $(SHELL) ./config.status
+
+$(ACLOCAL_M4):  configure.in 
+	cd $(srcdir) && $(ACLOCAL)
+
+config.status: $(srcdir)/configure
+	$(SHELL) ./config.status --recheck
+$(srcdir)/configure: $(srcdir)/configure.in $(ACLOCAL_M4) $(CONFIGURE_DEPENDENCIES)
+	cd $(srcdir) && $(AUTOCONF)
+
+mostlyclean-binPROGRAMS:
+
+clean-binPROGRAMS:
+	-test -z "$(bin_PROGRAMS)" || rm -f $(bin_PROGRAMS)
+
+distclean-binPROGRAMS:
+
+maintainer-clean-binPROGRAMS:
+
+install-binPROGRAMS: $(bin_PROGRAMS)
+	@$(NORMAL_INSTALL)
+	$(mkinstalldirs) $(DESTDIR)$(bindir)
+	@list='$(bin_PROGRAMS)'; for p in $$list; do \
+	  if test -f $$p; then \
+	    echo "  $(INSTALL_PROGRAM) $$p $(DESTDIR)$(bindir)/`echo $$p|sed '$(transform)'`"; \
+	     $(INSTALL_PROGRAM) $$p $(DESTDIR)$(bindir)/`echo $$p|sed '$(transform)'`; \
+	  else :; fi; \
+	done
+
+uninstall-binPROGRAMS:
+	@$(NORMAL_UNINSTALL)
+	list='$(bin_PROGRAMS)'; for p in $$list; do \
+	  rm -f $(DESTDIR)$(bindir)/`echo $$p|sed '$(transform)'`; \
+	done
+
+.c.o:
+	$(COMPILE) -c $<
+
+.s.o:
+	$(COMPILE) -c $<
+
+.S.o:
+	$(COMPILE) -c $<
+
+mostlyclean-compile:
+	-rm -f *.o core *.core
+
+clean-compile:
+
+distclean-compile:
+	-rm -f *.tab.c
+
+maintainer-clean-compile:
+
+pngmeta: $(pngmeta_OBJECTS) $(pngmeta_DEPENDENCIES)
+	@rm -f pngmeta
+	$(LINK) $(pngmeta_LDFLAGS) $(pngmeta_OBJECTS) $(pngmeta_LDADD) $(LIBS)
+install-man: $(MANS)
+	$(NORMAL_INSTALL)
+	$(mkinstalldirs) $(mandir)/man1
+	@sect=1;				\
+	inst=`echo "pngmeta" | sed '$(transform)'`.1; \
+	if test -f $(srcdir)/pngmeta.1; then file=$(srcdir)/pngmeta.1; \
+	else file=pngmeta.1; fi; \
+	echo " $(INSTALL_DATA) $$file $(mandir)/man$$sect/$$inst"; \
+	$(INSTALL_DATA) $$file $(mandir)/man$$sect/$$inst
+
+uninstall-man:
+	$(NORMAL_UNINSTALL)
+	inst=`echo "pngmeta" | sed '$(transform)'`.1; \
+	rm -f $(mandir)/man1/$$inst
+
+
+tags: TAGS
+
+ID: $(HEADERS) $(SOURCES) $(LISP)
+	here=`pwd` && cd $(srcdir) \
+	  && mkid -f$$here/ID $(SOURCES) $(HEADERS) $(LISP)
+
+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) $(LISP)
+	tags=; \
+	here=`pwd`; \
+	list='$(SOURCES) $(HEADERS)'; \
+	unique=`for i in $$list; do echo $$i; done | \
+	  awk '    { files[$$0] = 1; } \
+	       END { for (i in files) print i; }'`; \
+	test -z "$(ETAGS_ARGS)$$unique$(LISP)$$tags" \
+	  || (cd $(srcdir) && etags $(ETAGS_ARGS) $$tags  $$unique $(LISP) -o $$here/TAGS)
+
+mostlyclean-tags:
+
+clean-tags:
+
+distclean-tags:
+	-rm -f TAGS ID
+
+maintainer-clean-tags:
+
+distdir = $(PACKAGE)-$(VERSION)
+top_distdir = $(distdir)
+
+# This target untars the dist file and tries a VPATH configuration.  Then
+# it guarantees that the distribution is self-contained by making another
+# tarfile.
+distcheck: dist
+	rm -rf $(distdir)
+	GZIP=$(GZIP) $(TAR) zxf $(distdir).tar.gz
+	mkdir $(distdir)/=build
+	mkdir $(distdir)/=inst
+	dc_install_base=`cd $(distdir)/=inst && pwd`; \
+	cd $(distdir)/=build \
+	  && ../configure --srcdir=.. --prefix=$$dc_install_base \
+	  && $(MAKE) \
+	  && $(MAKE) dvi \
+	  && $(MAKE) check \
+	  && $(MAKE) install \
+	  && $(MAKE) installcheck \
+	  && $(MAKE) dist
+	rm -rf $(distdir)
+	@echo "========================"; \
+	echo "$(distdir).tar.gz is ready for distribution"; \
+	echo "========================"
+dist: distdir
+	-chmod -R a+r $(distdir)
+	GZIP=$(GZIP) $(TAR) chozf $(distdir).tar.gz $(distdir)
+	rm -rf $(distdir)
+dist-all: distdir
+	-chmod -R a+r $(distdir)
+	GZIP=$(GZIP) $(TAR) chozf $(distdir).tar.gz $(distdir)
+	rm -rf $(distdir)
+distdir: $(DISTFILES)
+	rm -rf $(distdir)
+	mkdir $(distdir)
+	-chmod 777 $(distdir)
+	@for file in $(DISTFILES); do \
+	  d=$(srcdir); \
+	  test -f $(distdir)/$$file \
+	  || ln $$d/$$file $(distdir)/$$file 2> /dev/null \
+	  || cp -p $$d/$$file $(distdir)/$$file; \
+	done
+check-TESTS: $(TESTS)
+	@failed=0; all=0; \
+	srcdir=$(srcdir); export srcdir; \
+	for tst in $(TESTS); do \
+	  if test -f $$tst; then dir=.; \
+	  else dir="$(srcdir)"; fi; \
+	  if $(TESTS_ENVIRONMENT) $$dir/$$tst; then \
+	    all=`expr $$all + 1`; \
+	    echo "PASS: $$tst"; \
+	  elif test $$? -ne 77; then \
+	    all=`expr $$all + 1`; \
+	    failed=`expr $$failed + 1`; \
+	    echo "FAIL: $$tst"; \
+	  fi; \
+	done; \
+	if test "$$failed" -eq 0; then \
+	  banner="All $$all tests passed"; \
+	else \
+	  banner="$$failed of $$all tests failed"; \
+	fi; \
+	dashes=`echo "$$banner" | sed s/./=/g`; \
+	echo "$$dashes"; \
+	echo "$$banner"; \
+	echo "$$dashes"; \
+	test "$$failed" -eq 0
+info:
+dvi:
+check: all
+	$(MAKE) check-TESTS
+installcheck:
+install-exec: install-binPROGRAMS
+	@$(NORMAL_INSTALL)
+
+install-data: install-man
+	@$(NORMAL_INSTALL)
+
+install: install-exec install-data all
+	@:
+
+uninstall: uninstall-binPROGRAMS uninstall-man
+
+all: Makefile $(PROGRAMS) $(MANS)
+
+install-strip:
+	$(MAKE) INSTALL_PROGRAM='$(INSTALL_PROGRAM) -s' INSTALL_SCRIPT='$(INSTALL_PROGRAM)' install
+installdirs:
+	$(mkinstalldirs)  $(bindir) $(mandir)/man1
+
+
+mostlyclean-generic:
+	-test -z "$(MOSTLYCLEANFILES)" || rm -f $(MOSTLYCLEANFILES)
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-rm -f Makefile $(DISTCLEANFILES)
+	-rm -f config.cache config.log stamp-h stamp-h[0-9]*
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+
+maintainer-clean-generic:
+	-test -z "$(MAINTAINERCLEANFILES)" || rm -f $(MAINTAINERCLEANFILES)
+	-test -z "$(BUILT_SOURCES)" || rm -f $(BUILT_SOURCES)
+mostlyclean:  mostlyclean-binPROGRAMS mostlyclean-compile \
+		mostlyclean-tags mostlyclean-generic
+
+clean:  clean-binPROGRAMS clean-compile clean-tags clean-generic \
+		mostlyclean
+
+distclean:  distclean-binPROGRAMS distclean-compile distclean-tags \
+		distclean-generic clean
+	rm -f config.status
+
+maintainer-clean:  maintainer-clean-binPROGRAMS maintainer-clean-compile \
+		maintainer-clean-tags maintainer-clean-generic \
+		distclean
+	@echo "This command is intended for maintainers to use;"
+	@echo "it deletes files that may require special tools to rebuild."
+	rm -f config.status
+
+.PHONY: default mostlyclean-binPROGRAMS distclean-binPROGRAMS \
+clean-binPROGRAMS maintainer-clean-binPROGRAMS uninstall-binPROGRAMS \
+install-binPROGRAMS mostlyclean-compile distclean-compile clean-compile \
+maintainer-clean-compile install-man uninstall-man tags \
+mostlyclean-tags distclean-tags clean-tags maintainer-clean-tags \
+distdir check-TESTS info dvi installcheck install-exec install-data \
+install uninstall all installdirs mostlyclean-generic distclean-generic \
+clean-generic maintainer-clean-generic clean mostlyclean distclean \
+maintainer-clean
+
+
+test-results: pngmeta
+	./pngmeta -quiet ct1n0g04.png > test1.xpt
+	./pngmeta -soif -quiet ctzn0g04.png > test2.xpt
+	./pngmeta -html -quiet 8859.png > test3.xpt
+	./pngmeta -xrdf ct1n0g04.png > test4.xpt
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/Makefile.old b/Makefile.old
new file mode 100644
index 000000000..e28cd7fb2
--- /dev/null
+++ b/Makefile.old
@@ -0,0 +1,68 @@
+#
+# basic makefile for pngmeta
+#
+
+PACKAGE=pngmeta
+VERSION=1.10
+
+ZLIB=../zlib
+LIBPNG=../libpng
+
+# Compile with GNU cc
+CC=gcc
+EXTRA_CC_FLAGS=-W -Wall
+
+# If you are not using gcc, set these options (must be an ANSI C compiler)
+#CC=cc
+#EXTRA_CC_FLAGS=
+
+
+CFLAGS= -DPACKAGE=\"$(PACKAGE)\" -DVERSION=\"$(VERSION)\" $(EXTRA_CC_FLAGS) -I$(LIBPNG) -I$(ZLIB) -g
+LDFLAGS=-L$(LIBPNG) -L$(ZLIB) -lpng -lz -lm
+
+# Need ranlib?
+#RANLIB=ranlib
+RANLIB=echo
+
+INSTALL=install
+
+# hierarchy where make install puts pngmeta
+prefix=/usr/local
+
+
+# Nothing needs configuring below here
+
+TEMPDIR=/tmp
+
+OBJS = pngmeta.o
+
+all: build
+
+build: pngmeta
+
+pngmeta: $(OBJS)
+	$(CC) -o pngmeta $(CCFLAGS) pngmeta.o $(LDFLAGS)
+
+TESTS=test1 test2 test3 test4
+
+check: pngmeta $(TESTS)
+	for test in $(TESTS); do \
+	  $$test; \
+	done
+
+test-results: pngmeta
+	./pngmeta -quiet ct1n0g04.png > test1.xpt
+	./pngmeta -soif -quiet ctzn0g04.png > test2.xpt
+	./pngmeta -html -quiet 8859.png > test3.xpt
+	./pngmeta -xrdf ct1n0g04.png > test4.xpt
+
+install: pngmeta
+	-@mkdir $(prefix)/bin
+	$(INSTALL) -c pngmeta $(prefix)/bin
+	$(INSTALL) -c pngmeta.1 $(prefix)/man/man1/pngmeta.1
+
+pngmeta.man: pngmeta.1
+	nroff -man $? > pngmeta.man
+
+clean:
+	rm -f *.o pngmeta.man pngmeta *~
diff --git a/NEWS b/NEWS
new file mode 100644
index 000000000..c6fb05203
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,40 @@
+Changes
+-------
+
+Version
+1.10	Updated to use latest zlib (1.1.3), libpng (1.0.5o).  Added
+	GNU style --options including --help page and --version
+
+1.9	Added -uri URI option to set URI for SOIF and RDF/XML output
+	For RDF/XML output don't escape values starting with <RDF
+
+1.8	Added RDF in XML output written by
+        Dan Brickley <daniel.brickley@bristol.ac.uk>
+
+1.7	Bug in printing out version.
+	Updated to use GNU configure stuff.
+
+1.6	libpng 1.0.0, zlib 1.1.1
+	Does SOIF by default when program is PngImage.sum
+	Version information output in usage and HTML.
+	Use libpng time formatting routine.
+
+1.4-1.5	libpng 0.87, 0.88, 0.88b, 0.89c and finally 0.90
+
+1.3	Tidied up HTML output.  Tested with libpng 0.86
+
+1.2	Added HTML output in <DL><DT>field</DT><DD><P>value</P></DD>...</DL>
+	form.
+
+1.1	Now outputs image meta data: format, colors (bitdepth),
+	width, height and image type in the style of the GIF
+	summariser for Harvest V1.4  Only outputs this for SOIF format.
+
+	Prints modification time chunk (tIME) contents if present in
+	RFC 1123 format, as suggested by PNG spec.
+
+1.0	For libpng 0.85 }
+			} Same functionality
+0.9	For libpng 0.81 }
+
+
diff --git a/README b/README
new file mode 100644
index 000000000..d2d599cd2
--- /dev/null
+++ b/README
@@ -0,0 +1,151 @@
+			       pngmeta
+			       =======
+
+This small filter program extracts metadata from PNG images and
+displays them as either HTML, SOIF, RDF/XML or simple fields and
+values.
+
+This software is distributed under the same copyright as the PNG
+Reference Library (libpng), upon which some of this code is based --
+see pngmeta.c for details.
+
+
+Requirements
+------------
+
+* An ANSI C compiler -- preferrably gcc
+* libpng (tested with 1.0.0, 1.0.03)
+* zlib   (tested with 1.1.1, 1.1.3)
+
+The latter two packages are available from ftp://ftp.uu.net/graphics/png/
+andr many other places, see the PNG Home Page for details.
+
+
+Installation
+------------
+
+Use the GNU configuration program:
+    ./configure
+    make
+
+This package needs the libpng and zlib libraries and header files and
+you have several ways to specify this if the above fails.
+
+If you have installed these packages in the default places (libs in
+usual lib path, includes under /usr/include), then they will be
+automatically found.  
+
+If you have compiled the packages but they remain in the source dirs,
+use one of these options to configure:
+
+  --with-png=DIR          DIR is root for libpng distribution
+  --with-zlib=DIR         DIR is root for libz distribution
+
+Note, this automatically happens the distributions are found in
+nearby directories with these names:
+  zlib-X.*    zlib   (subdirectories) or ../zlib
+  libpng-X.*  libpng (subdirectories) or ../libpng
+
+If the libraries and headers are installed in places that cannot be
+found by configure, you can specify the individual libraries and
+include paths with these options:
+
+  --with-zlib-lib=LIB     LIB is path to libz.a
+  --with-png-lib=LIB      LIB is path to libpng.a
+  --with-png-includes=DIR DIR is path where PNG header files can be
+                          found, defaults to /usr/include
+  --with-zlib-includes=DIR DIR is path where ZLIB header files can be
+                           found, defaults to /usr/include
+
+
+
+
+OR If all of that fails, use the Makefile.old, Edit the ZLIB and
+LIBPNG variables in the makefile to point to the zlib and libpng
+installation directories.  Pick a C compiler (by default set for gcc)
+and ranlib and then do a 'make -f Makefile.old'.
+
+
+Testing
+-------
+
+Three test PNG images are provided:
+  ct1n0g04.png ctzn0g04.png
+    which contain uncompressed and compressed text chunks respectively.
+    These are part of the PNG image test suite written by
+    Willem A.J. van Schaik <gwillem@ntuvax.ntu.ac.sg>
+
+  8859.png
+    All the printable ISO 8859-1 Latin 1 characters from hex codes
+    20 to 7E and A0 to FF provided by Chris Lilley <chris@w3.org>
+
+and these are all checked when 'make check' is run
+
+
+Usage Examples
+--------------
+
+mint% pngmeta goldhill.png 
+pngmeta: PNG meta data for goldhill.png:
+Title: GOLDHILL: Photo of hill in small European town.
+Copyright: Unknown
+Modification Time: 23 Apr 1995 01:15:08 +0000
+
+mint% pngmeta --soif ct1n0g04.png 
+@FILE { ct1n0g04.png
+image-format{3}:	PNG
+image-colors{1}:	4
+image-width{2}:	32
+image-height{2}:	32
+image-type{25}:	Grayscale, non-interlaced
+Title{8}:	PngSuite
+Author{49}:	Willem A.J. van Schaik
+(gwillem@ntuvax.ntu.ac.sg)
+Copyright{43}:	Copyright Willem van Schaik, Singapore 1995
+Description{239}:	A compilation of a set of images created to test the
+various color-types of the PNG format. Included are
+black&white, color, paletted, with alpha channel, with
+transparency formats. All bit-depths allowed according
+to the spec are present.
+Software{48}:	Created on a NeXTstation color using "pnmtopng".
+Disclaimer{9}:	Freeware.
+}
+
+
+See the manual page for more information on the options and usage.
+
+
+Implementation
+--------------
+
+The program contains a new function png_skip_till_end() that takes up
+the reading of the PNG data stream after the first IDAT has been
+detected.  It then copies through, checking the CRCs of them but not
+decompressing or processing them.  Finally, any remaining chunks are
+processed in the standard fashion.
+
+
+Copyright
+---------
+
+This code was modified from the code for png_read_end() from the
+libpng library.  See pngmeta.c for the full copyright headers - they
+have to remain in that file to comply with them.
+
+The GNU automake/autoconf configuration files and all that libpng and
+zlib searching stuff was written by me and I give permission for
+other people to use it to autoconfigure png and zlib in their
+programs, as long as you acknowledge me.
+
+
+Thanks
+------
+... to Rick Rodgers <rodgers@nlm.nih.gov> for the manual page.
+... to Dan Brickley <daniel.brickley@bristol.ac.uk> for the RDF/XML output.
+
+
+Dave Beckett
+D.J.Beckett@ukc.ac.uk
+http://www.cs.ukc.ac.uk/people/staff/djb1/
+31st January 2000
+
diff --git a/README_master.txt b/README_master.txt
deleted file mode 100644
index 2f66e3136..000000000
--- a/README_master.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-
-/*
-  This is the master branch of the "pmt" tree.
-  Individual projects are in separate branches,
-    e.g. pngcrush is in the "pngcrush" branch.
-*/
diff --git a/aclocal.m4 b/aclocal.m4
new file mode 100644
index 000000000..cfcb5d2b5
--- /dev/null
+++ b/aclocal.m4
@@ -0,0 +1,103 @@
+dnl aclocal.m4 generated automatically by aclocal 1.2
+
+# Do all the work for Automake.  This macro actually does too much --
+# some checks are only needed if your package does certain things.
+# But this isn't really a big deal.
+
+# serial 1
+
+dnl Usage:
+dnl AM_INIT_AUTOMAKE(package,version, [no-define])
+
+AC_DEFUN(AM_INIT_AUTOMAKE,
+[AC_REQUIRE([AM_PROG_INSTALL])
+PACKAGE=[$1]
+AC_SUBST(PACKAGE)
+VERSION=[$2]
+AC_SUBST(VERSION)
+dnl test to see if srcdir already configured
+if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
+  AC_MSG_ERROR([source directory already configured; run "make distclean" there first])
+fi
+ifelse([$3],,
+AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE")
+AC_DEFINE_UNQUOTED(VERSION, "$VERSION"))
+AC_REQUIRE([AM_SANITY_CHECK])
+AC_REQUIRE([AC_ARG_PROGRAM])
+dnl FIXME This is truly gross.
+missing_dir=`cd $ac_aux_dir && pwd`
+AM_MISSING_PROG(ACLOCAL, aclocal, $missing_dir)
+AM_MISSING_PROG(AUTOCONF, autoconf, $missing_dir)
+AM_MISSING_PROG(AUTOMAKE, automake, $missing_dir)
+AM_MISSING_PROG(AUTOHEADER, autoheader, $missing_dir)
+AM_MISSING_PROG(MAKEINFO, makeinfo, $missing_dir)
+AC_REQUIRE([AC_PROG_MAKE_SET])])
+
+
+# serial 1
+
+AC_DEFUN(AM_PROG_INSTALL,
+[AC_REQUIRE([AC_PROG_INSTALL])
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
+AC_SUBST(INSTALL_SCRIPT)dnl
+])
+
+#
+# Check to make sure that the build environment is sane.
+#
+
+AC_DEFUN(AM_SANITY_CHECK,
+[AC_MSG_CHECKING([whether build environment is sane])
+# Just in case
+sleep 1
+echo timestamp > conftestfile
+# Do `set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
+   if test "[$]*" = "X"; then
+      # -L didn't work.
+      set X `ls -t $srcdir/configure conftestfile`
+   fi
+   if test "[$]*" != "X $srcdir/configure conftestfile" \
+      && test "[$]*" != "X conftestfile $srcdir/configure"; then
+
+      # If neither matched, then we have a broken ls.  This can happen
+      # if, for instance, CONFIG_SHELL is bash and it inherits a
+      # broken ls alias from the environment.  This has actually
+      # happened.  Such a system could not be considered "sane".
+      AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
+alias in your environment])
+   fi
+
+   test "[$]2" = conftestfile
+   )
+then
+   # Ok.
+   :
+else
+   AC_MSG_ERROR([newly created file is older than distributed files!
+Check your system clock])
+fi
+rm -f conftest*
+AC_MSG_RESULT(yes)])
+
+dnl AM_MISSING_PROG(NAME, PROGRAM, DIRECTORY)
+dnl The program must properly implement --version.
+AC_DEFUN(AM_MISSING_PROG,
+[AC_MSG_CHECKING(for working $2)
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if ($2 --version) < /dev/null > /dev/null 2>&1; then
+   $1=$2
+   AC_MSG_RESULT(found)
+else
+   $1="$3/missing $2"
+   AC_MSG_RESULT(missing)
+fi
+AC_SUBST($1)])
+
diff --git a/configure b/configure
new file mode 100755
index 000000000..3e5c23951
--- /dev/null
+++ b/configure
@@ -0,0 +1,1477 @@
+#! /bin/sh
+
+# From configure.in Revision: 1.4 
+
+# Do all the work for Automake.  This macro actually does too much --
+# some checks are only needed if your package does certain things.
+# But this isn't really a big deal.
+
+# serial 1
+
+
+
+
+
+# serial 1
+
+
+
+#
+# Check to make sure that the build environment is sane.
+#
+
+
+
+
+
+# Guess values for system-dependent variables and create Makefiles.
+# Generated automatically using autoconf version 2.12 
+# Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc.
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+
+# Defaults:
+ac_help=
+ac_default_prefix=/usr/local
+# Any additions from configure.in:
+ac_help="$ac_help
+  --with-png=DIR          DIR is root for libpng distribution"
+ac_help="$ac_help
+  --with-zlib=DIR         DIR is root for libz distribution"
+ac_help="$ac_help
+  --with-zlib-lib=LIB     LIB is path to libz.a"
+ac_help="$ac_help
+  --with-png-lib=LIB      LIB is path to libpng.a"
+ac_help="$ac_help
+  --with-png-includes=DIR DIR is path where PNG header files can be
+                          found, defaults to /usr/include"
+ac_help="$ac_help
+  --with-zlib-includes=DIR DIR is path where ZLIB header files can be
+                           found, defaults to /usr/include"
+
+# Initialize some variables set by options.
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+build=NONE
+cache_file=./config.cache
+exec_prefix=NONE
+host=NONE
+no_create=
+nonopt=NONE
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+target=NONE
+verbose=
+x_includes=NONE
+x_libraries=NONE
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datadir='${prefix}/share'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+libdir='${exec_prefix}/lib'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+infodir='${prefix}/info'
+mandir='${prefix}/man'
+
+# Initialize some other variables.
+subdirs=
+MFLAGS= MAKEFLAGS=
+# Maximum number of lines to put in a shell here document.
+ac_max_here_lines=12
+
+ac_prev=
+for ac_option
+do
+
+  # If the previous option needs an argument, assign it.
+  if test -n "$ac_prev"; then
+    eval "$ac_prev=\$ac_option"
+    ac_prev=
+    continue
+  fi
+
+  case "$ac_option" in
+  -*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+  *) ac_optarg= ;;
+  esac
+
+  # Accept the important Cygnus configure options, so we can diagnose typos.
+
+  case "$ac_option" in
+
+  -bindir | --bindir | --bindi | --bind | --bin | --bi)
+    ac_prev=bindir ;;
+  -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+    bindir="$ac_optarg" ;;
+
+  -build | --build | --buil | --bui | --bu)
+    ac_prev=build ;;
+  -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+    build="$ac_optarg" ;;
+
+  -cache-file | --cache-file | --cache-fil | --cache-fi \
+  | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+    ac_prev=cache_file ;;
+  -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+  | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+    cache_file="$ac_optarg" ;;
+
+  -datadir | --datadir | --datadi | --datad | --data | --dat | --da)
+    ac_prev=datadir ;;
+  -datadir=* | --datadir=* | --datadi=* | --datad=* | --data=* | --dat=* \
+  | --da=*)
+    datadir="$ac_optarg" ;;
+
+  -disable-* | --disable-*)
+    ac_feature=`echo $ac_option|sed -e 's/-*disable-//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_feature| sed 's/[-a-zA-Z0-9_]//g'`"; then
+      { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+    fi
+    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+    eval "enable_${ac_feature}=no" ;;
+
+  -enable-* | --enable-*)
+    ac_feature=`echo $ac_option|sed -e 's/-*enable-//' -e 's/=.*//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_feature| sed 's/[-_a-zA-Z0-9]//g'`"; then
+      { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+    fi
+    ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+    case "$ac_option" in
+      *=*) ;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "enable_${ac_feature}='$ac_optarg'" ;;
+
+  -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+  | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+  | --exec | --exe | --ex)
+    ac_prev=exec_prefix ;;
+  -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+  | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+  | --exec=* | --exe=* | --ex=*)
+    exec_prefix="$ac_optarg" ;;
+
+  -gas | --gas | --ga | --g)
+    # Obsolete; use --with-gas.
+    with_gas=yes ;;
+
+  -help | --help | --hel | --he)
+    # Omit some internal or obsolete options to make the list less imposing.
+    # This message is too long to be a string in the A/UX 3.1 sh.
+    cat << EOF
+Usage: configure [options] [host]
+Options: [defaults in brackets after descriptions]
+Configuration:
+  --cache-file=FILE       cache test results in FILE
+  --help                  print this message
+  --no-create             do not create output files
+  --quiet, --silent       do not print \`checking...' messages
+  --version               print the version of autoconf that created configure
+Directory and file names:
+  --prefix=PREFIX         install architecture-independent files in PREFIX
+                          [$ac_default_prefix]
+  --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
+                          [same as prefix]
+  --bindir=DIR            user executables in DIR [EPREFIX/bin]
+  --sbindir=DIR           system admin executables in DIR [EPREFIX/sbin]
+  --libexecdir=DIR        program executables in DIR [EPREFIX/libexec]
+  --datadir=DIR           read-only architecture-independent data in DIR
+                          [PREFIX/share]
+  --sysconfdir=DIR        read-only single-machine data in DIR [PREFIX/etc]
+  --sharedstatedir=DIR    modifiable architecture-independent data in DIR
+                          [PREFIX/com]
+  --localstatedir=DIR     modifiable single-machine data in DIR [PREFIX/var]
+  --libdir=DIR            object code libraries in DIR [EPREFIX/lib]
+  --includedir=DIR        C header files in DIR [PREFIX/include]
+  --oldincludedir=DIR     C header files for non-gcc in DIR [/usr/include]
+  --infodir=DIR           info documentation in DIR [PREFIX/info]
+  --mandir=DIR            man documentation in DIR [PREFIX/man]
+  --srcdir=DIR            find the sources in DIR [configure dir or ..]
+  --program-prefix=PREFIX prepend PREFIX to installed program names
+  --program-suffix=SUFFIX append SUFFIX to installed program names
+  --program-transform-name=PROGRAM
+                          run sed PROGRAM on installed program names
+EOF
+    cat << EOF
+Host type:
+  --build=BUILD           configure for building on BUILD [BUILD=HOST]
+  --host=HOST             configure for HOST [guessed]
+  --target=TARGET         configure for TARGET [TARGET=HOST]
+Features and packages:
+  --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
+  --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
+  --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
+  --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
+  --x-includes=DIR        X include files are in DIR
+  --x-libraries=DIR       X library files are in DIR
+EOF
+    if test -n "$ac_help"; then
+      echo "--enable and --with options recognized:$ac_help"
+    fi
+    exit 0 ;;
+
+  -host | --host | --hos | --ho)
+    ac_prev=host ;;
+  -host=* | --host=* | --hos=* | --ho=*)
+    host="$ac_optarg" ;;
+
+  -includedir | --includedir | --includedi | --included | --include \
+  | --includ | --inclu | --incl | --inc)
+    ac_prev=includedir ;;
+  -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+  | --includ=* | --inclu=* | --incl=* | --inc=*)
+    includedir="$ac_optarg" ;;
+
+  -infodir | --infodir | --infodi | --infod | --info | --inf)
+    ac_prev=infodir ;;
+  -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+    infodir="$ac_optarg" ;;
+
+  -libdir | --libdir | --libdi | --libd)
+    ac_prev=libdir ;;
+  -libdir=* | --libdir=* | --libdi=* | --libd=*)
+    libdir="$ac_optarg" ;;
+
+  -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+  | --libexe | --libex | --libe)
+    ac_prev=libexecdir ;;
+  -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+  | --libexe=* | --libex=* | --libe=*)
+    libexecdir="$ac_optarg" ;;
+
+  -localstatedir | --localstatedir | --localstatedi | --localstated \
+  | --localstate | --localstat | --localsta | --localst \
+  | --locals | --local | --loca | --loc | --lo)
+    ac_prev=localstatedir ;;
+  -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+  | --localstate=* | --localstat=* | --localsta=* | --localst=* \
+  | --locals=* | --local=* | --loca=* | --loc=* | --lo=*)
+    localstatedir="$ac_optarg" ;;
+
+  -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+    ac_prev=mandir ;;
+  -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+    mandir="$ac_optarg" ;;
+
+  -nfp | --nfp | --nf)
+    # Obsolete; use --without-fp.
+    with_fp=no ;;
+
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c)
+    no_create=yes ;;
+
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+    no_recursion=yes ;;
+
+  -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+  | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+  | --oldin | --oldi | --old | --ol | --o)
+    ac_prev=oldincludedir ;;
+  -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+  | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+  | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+    oldincludedir="$ac_optarg" ;;
+
+  -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+    ac_prev=prefix ;;
+  -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+    prefix="$ac_optarg" ;;
+
+  -program-prefix | --program-prefix | --program-prefi | --program-pref \
+  | --program-pre | --program-pr | --program-p)
+    ac_prev=program_prefix ;;
+  -program-prefix=* | --program-prefix=* | --program-prefi=* \
+  | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+    program_prefix="$ac_optarg" ;;
+
+  -program-suffix | --program-suffix | --program-suffi | --program-suff \
+  | --program-suf | --program-su | --program-s)
+    ac_prev=program_suffix ;;
+  -program-suffix=* | --program-suffix=* | --program-suffi=* \
+  | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+    program_suffix="$ac_optarg" ;;
+
+  -program-transform-name | --program-transform-name \
+  | --program-transform-nam | --program-transform-na \
+  | --program-transform-n | --program-transform- \
+  | --program-transform | --program-transfor \
+  | --program-transfo | --program-transf \
+  | --program-trans | --program-tran \
+  | --progr-tra | --program-tr | --program-t)
+    ac_prev=program_transform_name ;;
+  -program-transform-name=* | --program-transform-name=* \
+  | --program-transform-nam=* | --program-transform-na=* \
+  | --program-transform-n=* | --program-transform-=* \
+  | --program-transform=* | --program-transfor=* \
+  | --program-transfo=* | --program-transf=* \
+  | --program-trans=* | --program-tran=* \
+  | --progr-tra=* | --program-tr=* | --program-t=*)
+    program_transform_name="$ac_optarg" ;;
+
+  -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+  | -silent | --silent | --silen | --sile | --sil)
+    silent=yes ;;
+
+  -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+    ac_prev=sbindir ;;
+  -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+  | --sbi=* | --sb=*)
+    sbindir="$ac_optarg" ;;
+
+  -sharedstatedir | --sharedstatedir | --sharedstatedi \
+  | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+  | --sharedst | --shareds | --shared | --share | --shar \
+  | --sha | --sh)
+    ac_prev=sharedstatedir ;;
+  -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+  | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+  | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+  | --sha=* | --sh=*)
+    sharedstatedir="$ac_optarg" ;;
+
+  -site | --site | --sit)
+    ac_prev=site ;;
+  -site=* | --site=* | --sit=*)
+    site="$ac_optarg" ;;
+
+  -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+    ac_prev=srcdir ;;
+  -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+    srcdir="$ac_optarg" ;;
+
+  -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+  | --syscon | --sysco | --sysc | --sys | --sy)
+    ac_prev=sysconfdir ;;
+  -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+  | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+    sysconfdir="$ac_optarg" ;;
+
+  -target | --target | --targe | --targ | --tar | --ta | --t)
+    ac_prev=target ;;
+  -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+    target="$ac_optarg" ;;
+
+  -v | -verbose | --verbose | --verbos | --verbo | --verb)
+    verbose=yes ;;
+
+  -version | --version | --versio | --versi | --vers)
+    echo "configure generated by autoconf version 2.12"
+    exit 0 ;;
+
+  -with-* | --with-*)
+    ac_package=`echo $ac_option|sed -e 's/-*with-//' -e 's/=.*//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_package| sed 's/[-_a-zA-Z0-9]//g'`"; then
+      { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; }
+    fi
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    case "$ac_option" in
+      *=*) ;;
+      *) ac_optarg=yes ;;
+    esac
+    eval "with_${ac_package}='$ac_optarg'" ;;
+
+  -without-* | --without-*)
+    ac_package=`echo $ac_option|sed -e 's/-*without-//'`
+    # Reject names that are not valid shell variable names.
+    if test -n "`echo $ac_package| sed 's/[-a-zA-Z0-9_]//g'`"; then
+      { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; }
+    fi
+    ac_package=`echo $ac_package| sed 's/-/_/g'`
+    eval "with_${ac_package}=no" ;;
+
+  --x)
+    # Obsolete; use --with-x.
+    with_x=yes ;;
+
+  -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+  | --x-incl | --x-inc | --x-in | --x-i)
+    ac_prev=x_includes ;;
+  -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+  | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+    x_includes="$ac_optarg" ;;
+
+  -x-libraries | --x-libraries | --x-librarie | --x-librari \
+  | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+    ac_prev=x_libraries ;;
+  -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+  | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+    x_libraries="$ac_optarg" ;;
+
+  -*) { echo "configure: error: $ac_option: invalid option; use --help to show usage" 1>&2; exit 1; }
+    ;;
+
+  *)
+    if test -n "`echo $ac_option| sed 's/[-a-z0-9.]//g'`"; then
+      echo "configure: warning: $ac_option: invalid host type" 1>&2
+    fi
+    if test "x$nonopt" != xNONE; then
+      { echo "configure: error: can only configure for one host and one target at a time" 1>&2; exit 1; }
+    fi
+    nonopt="$ac_option"
+    ;;
+
+  esac
+done
+
+if test -n "$ac_prev"; then
+  { echo "configure: error: missing argument to --`echo $ac_prev | sed 's/_/-/g'`" 1>&2; exit 1; }
+fi
+
+trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15
+
+# File descriptor usage:
+# 0 standard input
+# 1 file creation
+# 2 errors and warnings
+# 3 some systems may open it to /dev/tty
+# 4 used on the Kubota Titan
+# 6 checking for... messages and results
+# 5 compiler messages saved in config.log
+if test "$silent" = yes; then
+  exec 6>/dev/null
+else
+  exec 6>&1
+fi
+exec 5>./config.log
+
+echo "\
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+" 1>&5
+
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Also quote any args containing shell metacharacters.
+ac_configure_args=
+for ac_arg
+do
+  case "$ac_arg" in
+  -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+  | --no-cr | --no-c) ;;
+  -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+  | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r) ;;
+  *" "*|*"	"*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*)
+  ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+  *) ac_configure_args="$ac_configure_args $ac_arg" ;;
+  esac
+done
+
+# NLS nuisances.
+# Only set these to C if already set.  These must not be set unconditionally
+# because not all systems understand e.g. LANG=C (notably SCO).
+# Fixing LC_MESSAGES prevents Solaris sh from translating var values in `set'!
+# Non-C LC_CTYPE values break the ctype check.
+if test "${LANG+set}"   = set; then LANG=C;   export LANG;   fi
+if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
+if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
+if test "${LC_CTYPE+set}"    = set; then LC_CTYPE=C;    export LC_CTYPE;    fi
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -rf conftest* confdefs.h
+# AIX cpp loses on an empty file, so make sure it contains at least a newline.
+echo > confdefs.h
+
+# A filename unique to this package, relative to the directory that
+# configure is in, which we can look for to find out if srcdir is correct.
+ac_unique_file=pngmeta.c
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+  ac_srcdir_defaulted=yes
+  # Try the directory containing this script, then its parent.
+  ac_prog=$0
+  ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'`
+  test "x$ac_confdir" = "x$ac_prog" && ac_confdir=.
+  srcdir=$ac_confdir
+  if test ! -r $srcdir/$ac_unique_file; then
+    srcdir=..
+  fi
+else
+  ac_srcdir_defaulted=no
+fi
+if test ! -r $srcdir/$ac_unique_file; then
+  if test "$ac_srcdir_defaulted" = yes; then
+    { echo "configure: error: can not find sources in $ac_confdir or .." 1>&2; exit 1; }
+  else
+    { echo "configure: error: can not find sources in $srcdir" 1>&2; exit 1; }
+  fi
+fi
+srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'`
+
+# Prefer explicitly selected file to automatically selected ones.
+if test -z "$CONFIG_SITE"; then
+  if test "x$prefix" != xNONE; then
+    CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
+  else
+    CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+  fi
+fi
+for ac_site_file in $CONFIG_SITE; do
+  if test -r "$ac_site_file"; then
+    echo "loading site script $ac_site_file"
+    . "$ac_site_file"
+  fi
+done
+
+if test -r "$cache_file"; then
+  echo "loading cache $cache_file"
+  . $cache_file
+else
+  echo "creating cache $cache_file"
+  > $cache_file
+fi
+
+ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
+  # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
+  if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
+    ac_n= ac_c='
+' ac_t='	'
+  else
+    ac_n=-n ac_c= ac_t=
+  fi
+else
+  ac_n= ac_c='\c' ac_t=
+fi
+
+
+ac_aux_dir=
+for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
+  if test -f $ac_dir/install-sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install-sh -c"
+    break
+  elif test -f $ac_dir/install.sh; then
+    ac_aux_dir=$ac_dir
+    ac_install_sh="$ac_aux_dir/install.sh -c"
+    break
+  fi
+done
+if test -z "$ac_aux_dir"; then
+  { echo "configure: error: can not find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." 1>&2; exit 1; }
+fi
+ac_config_guess=$ac_aux_dir/config.guess
+ac_config_sub=$ac_aux_dir/config.sub
+ac_configure=$ac_aux_dir/configure # This should be Cygnus configure.
+
+# Find a good install program.  We prefer a C program (faster),
+# so one script is as good as another.  But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# ./install, which can be erroneously created by make from ./install.sh.
+echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
+echo "configure:590: checking for a BSD compatible install" >&5
+if test -z "$INSTALL"; then
+if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+    IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    # Account for people who put trailing slashes in PATH elements.
+    case "$ac_dir/" in
+    /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;;
+    *)
+      # OSF1 and SCO ODT 3.0 have their own names for install.
+      for ac_prog in ginstall installbsd scoinst install; do
+        if test -f $ac_dir/$ac_prog; then
+	  if test $ac_prog = install &&
+            grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
+	    # AIX install.  It has an incompatible calling convention.
+	    # OSF/1 installbsd also uses dspmsg, but is usable.
+	    :
+	  else
+	    ac_cv_path_install="$ac_dir/$ac_prog -c"
+	    break 2
+	  fi
+	fi
+      done
+      ;;
+    esac
+  done
+  IFS="$ac_save_IFS"
+
+fi
+  if test "${ac_cv_path_install+set}" = set; then
+    INSTALL="$ac_cv_path_install"
+  else
+    # As a last resort, use the slow shell script.  We don't cache a
+    # path for INSTALL within a source directory, because that will
+    # break other packages using the cache if that directory is
+    # removed, or if the path is relative.
+    INSTALL="$ac_install_sh"
+  fi
+fi
+echo "$ac_t""$INSTALL" 1>&6
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+
+test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}'
+
+echo $ac_n "checking whether build environment is sane""... $ac_c" 1>&6
+echo "configure:643: checking whether build environment is sane" >&5
+# Just in case
+sleep 1
+echo timestamp > conftestfile
+# Do `set' in a subshell so we don't clobber the current shell's
+# arguments.  Must try -L first in case configure is actually a
+# symlink; some systems play weird games with the mod time of symlinks
+# (eg FreeBSD returns the mod time of the symlink's containing
+# directory).
+if (
+   set X `ls -Lt $srcdir/configure conftestfile 2> /dev/null`
+   if test "$*" = "X"; then
+      # -L didn't work.
+      set X `ls -t $srcdir/configure conftestfile`
+   fi
+   if test "$*" != "X $srcdir/configure conftestfile" \
+      && test "$*" != "X conftestfile $srcdir/configure"; then
+
+      # If neither matched, then we have a broken ls.  This can happen
+      # if, for instance, CONFIG_SHELL is bash and it inherits a
+      # broken ls alias from the environment.  This has actually
+      # happened.  Such a system could not be considered "sane".
+      { echo "configure: error: ls -t appears to fail.  Make sure there is not a broken
+alias in your environment" 1>&2; exit 1; }
+   fi
+
+   test "$2" = conftestfile
+   )
+then
+   # Ok.
+   :
+else
+   { echo "configure: error: newly created file is older than distributed files!
+Check your system clock" 1>&2; exit 1; }
+fi
+rm -f conftest*
+echo "$ac_t""yes" 1>&6
+if test "$program_transform_name" = s,x,x,; then
+  program_transform_name=
+else
+  # Double any \ or $.  echo might interpret backslashes.
+  cat <<\EOF_SED > conftestsed
+s,\\,\\\\,g; s,\$,$$,g
+EOF_SED
+  program_transform_name="`echo $program_transform_name|sed -f conftestsed`"
+  rm -f conftestsed
+fi
+test "$program_prefix" != NONE &&
+  program_transform_name="s,^,${program_prefix},; $program_transform_name"
+# Use a double $ so make ignores it.
+test "$program_suffix" != NONE &&
+  program_transform_name="s,\$\$,${program_suffix},; $program_transform_name"
+
+# sed with no file args requires a program.
+test "$program_transform_name" = "" && program_transform_name="s,x,x,"
+
+echo $ac_n "checking whether ${MAKE-make} sets \${MAKE}""... $ac_c" 1>&6
+echo "configure:700: checking whether ${MAKE-make} sets \${MAKE}" >&5
+set dummy ${MAKE-make}; ac_make=`echo "$2" | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_prog_make_${ac_make}_set'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftestmake <<\EOF
+all:
+	@echo 'ac_maketemp="${MAKE}"'
+EOF
+# GNU make sometimes prints "make[1]: Entering...", which would confuse us.
+eval `${MAKE-make} -f conftestmake 2>/dev/null | grep temp=`
+if test -n "$ac_maketemp"; then
+  eval ac_cv_prog_make_${ac_make}_set=yes
+else
+  eval ac_cv_prog_make_${ac_make}_set=no
+fi
+rm -f conftestmake
+fi
+if eval "test \"`echo '$ac_cv_prog_make_'${ac_make}_set`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  SET_MAKE=
+else
+  echo "$ac_t""no" 1>&6
+  SET_MAKE="MAKE=${MAKE-make}"
+fi
+
+
+PACKAGE=pngmeta
+
+VERSION=1.10
+
+if test "`cd $srcdir && pwd`" != "`pwd`" && test -f $srcdir/config.status; then
+  { echo "configure: error: source directory already configured; run "make distclean" there first" 1>&2; exit 1; }
+fi
+cat >> confdefs.h <<EOF
+#define PACKAGE "$PACKAGE"
+EOF
+
+cat >> confdefs.h <<EOF
+#define VERSION "$VERSION"
+EOF
+
+
+
+missing_dir=`cd $ac_aux_dir && pwd`
+echo $ac_n "checking for working aclocal""... $ac_c" 1>&6
+echo "configure:746: checking for working aclocal" >&5
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if (aclocal --version) < /dev/null > /dev/null 2>&1; then
+   ACLOCAL=aclocal
+   echo "$ac_t""found" 1>&6
+else
+   ACLOCAL="$missing_dir/missing aclocal"
+   echo "$ac_t""missing" 1>&6
+fi
+
+echo $ac_n "checking for working autoconf""... $ac_c" 1>&6
+echo "configure:759: checking for working autoconf" >&5
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if (autoconf --version) < /dev/null > /dev/null 2>&1; then
+   AUTOCONF=autoconf
+   echo "$ac_t""found" 1>&6
+else
+   AUTOCONF="$missing_dir/missing autoconf"
+   echo "$ac_t""missing" 1>&6
+fi
+
+echo $ac_n "checking for working automake""... $ac_c" 1>&6
+echo "configure:772: checking for working automake" >&5
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if (automake --version) < /dev/null > /dev/null 2>&1; then
+   AUTOMAKE=automake
+   echo "$ac_t""found" 1>&6
+else
+   AUTOMAKE="$missing_dir/missing automake"
+   echo "$ac_t""missing" 1>&6
+fi
+
+echo $ac_n "checking for working autoheader""... $ac_c" 1>&6
+echo "configure:785: checking for working autoheader" >&5
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if (autoheader --version) < /dev/null > /dev/null 2>&1; then
+   AUTOHEADER=autoheader
+   echo "$ac_t""found" 1>&6
+else
+   AUTOHEADER="$missing_dir/missing autoheader"
+   echo "$ac_t""missing" 1>&6
+fi
+
+echo $ac_n "checking for working makeinfo""... $ac_c" 1>&6
+echo "configure:798: checking for working makeinfo" >&5
+# Run test in a subshell; some versions of sh will print an error if
+# an executable is not found, even if stderr is redirected.
+# Redirect stdin to placate older versions of autoconf.  Sigh.
+if (makeinfo --version) < /dev/null > /dev/null 2>&1; then
+   MAKEINFO=makeinfo
+   echo "$ac_t""found" 1>&6
+else
+   MAKEINFO="$missing_dir/missing makeinfo"
+   echo "$ac_t""missing" 1>&6
+fi
+
+
+
+
+# Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:816: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      ac_cv_prog_CC="gcc"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+fi
+fi
+CC="$ac_cv_prog_CC"
+if test -n "$CC"; then
+  echo "$ac_t""$CC" 1>&6
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+if test -z "$CC"; then
+  # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:845: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  if test -n "$CC"; then
+  ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+  IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+  ac_prog_rejected=no
+  for ac_dir in $PATH; do
+    test -z "$ac_dir" && ac_dir=.
+    if test -f $ac_dir/$ac_word; then
+      if test "$ac_dir/$ac_word" = "/usr/ucb/cc"; then
+        ac_prog_rejected=yes
+	continue
+      fi
+      ac_cv_prog_CC="cc"
+      break
+    fi
+  done
+  IFS="$ac_save_ifs"
+if test $ac_prog_rejected = yes; then
+  # We found a bogon in the path, so make sure we never use it.
+  set dummy $ac_cv_prog_CC
+  shift
+  if test $# -gt 0; then
+    # We chose a different compiler from the bogus one.
+    # However, it has the same basename, so the bogon will be chosen
+    # first if we set CC to just the basename; use the full file name.
+    shift
+    set dummy "$ac_dir/$ac_word" "$@"
+    shift
+    ac_cv_prog_CC="$@"
+  fi
+fi
+fi
+fi
+CC="$ac_cv_prog_CC"
+if test -n "$CC"; then
+  echo "$ac_t""$CC" 1>&6
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+  test -z "$CC" && { echo "configure: error: no acceptable cc found in \$PATH" 1>&2; exit 1; }
+fi
+
+echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
+echo "configure:893: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+
+ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+cat > conftest.$ac_ext <<EOF
+#line 903 "configure"
+#include "confdefs.h"
+main(){return(0);}
+EOF
+if { (eval echo configure:907: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  ac_cv_prog_cc_works=yes
+  # If we can't run a trivial program, we are probably using a cross compiler.
+  if (./conftest; exit) 2>/dev/null; then
+    ac_cv_prog_cc_cross=no
+  else
+    ac_cv_prog_cc_cross=yes
+  fi
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  ac_cv_prog_cc_works=no
+fi
+rm -fr conftest*
+
+echo "$ac_t""$ac_cv_prog_cc_works" 1>&6
+if test $ac_cv_prog_cc_works = no; then
+  { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
+fi
+echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
+echo "configure:927: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
+cross_compiling=$ac_cv_prog_cc_cross
+
+echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
+echo "configure:932: checking whether we are using GNU C" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.c <<EOF
+#ifdef __GNUC__
+  yes;
+#endif
+EOF
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:941: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+  ac_cv_prog_gcc=yes
+else
+  ac_cv_prog_gcc=no
+fi
+fi
+
+echo "$ac_t""$ac_cv_prog_gcc" 1>&6
+
+if test $ac_cv_prog_gcc = yes; then
+  GCC=yes
+  ac_test_CFLAGS="${CFLAGS+set}"
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS=
+  echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
+echo "configure:956: checking whether ${CC-cc} accepts -g" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  echo 'void f(){}' > conftest.c
+if test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then
+  ac_cv_prog_cc_g=yes
+else
+  ac_cv_prog_cc_g=no
+fi
+rm -f conftest*
+
+fi
+
+echo "$ac_t""$ac_cv_prog_cc_g" 1>&6
+  if test "$ac_test_CFLAGS" = set; then
+    CFLAGS="$ac_save_CFLAGS"
+  elif test $ac_cv_prog_cc_g = yes; then
+    CFLAGS="-g -O2"
+  else
+    CFLAGS="-O2"
+  fi
+else
+  GCC=
+  test "${CFLAGS+set}" = set || CFLAGS="-g"
+fi
+
+
+
+
+
+# Allow use of libpng and zlib from raw distributions
+PNG_INCLUDE=/usr/include # prefix?
+# Check whether --with-png or --without-png was given.
+if test "${with_png+set}" = set; then
+  withval="$with_png"
+  :
+fi
+
+
+echo $ac_n "checking for local copy of libpng distribution""... $ac_c" 1>&6
+echo "configure:997: checking for local copy of libpng distribution" >&5
+if test "X$with_png" = "X"; then
+  for dir in libpng-0-9* libpng ../libpng-0-9* ../libpng; do
+    if test -d $dir -a -f $dir/png.h; then
+      with_png=$dir
+      LIBS="$LIBS -lpng"
+      break
+    fi
+  done
+fi
+if test "X$with_png" != "X"; then
+  echo "$ac_t""$with_png" 1>&6
+  LDFLAGS="$LDFLAGS -L$with_png"
+  PNG_INCLUDE=$with_png
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+
+ZLIB_INCLUDE=/usr/include # prefix?
+# Check whether --with-zlib or --without-zlib was given.
+if test "${with_zlib+set}" = set; then
+  withval="$with_zlib"
+  :
+fi
+
+
+echo $ac_n "checking for local copy of zlib distribution""... $ac_c" 1>&6
+echo "configure:1025: checking for local copy of zlib distribution" >&5
+if test "X$with_zlib" = "X"; then
+  for dir in zlib-0-9* zlib ../zlib-0-9* ../zlib; do
+    if test -d $dir -a -f $dir/zlib.h; then
+      with_zlib=$dir
+      LIBS="$LIBS -lz"
+      break
+    fi
+  done
+fi
+if test "X$with_zlib" != "X"; then
+  echo "$ac_t""$with_zlib" 1>&6
+  LDFLAGS="$LDFLAGS -L$with_zlib"
+  ZLIB_INCLUDE=$with_zlib
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+
+
+
+# Allow use of libpng and zlib from installed areas
+# Check whether --with-zlib_lib or --without-zlib_lib was given.
+if test "${with_zlib_lib+set}" = set; then
+  withval="$with_zlib_lib"
+  :
+fi
+
+if test "X$with_zlib_lib" != "X"; then
+  LDFLAGS="$LDFLAGS -L$with_zlib_lib"
+fi
+
+echo $ac_n "checking for zlibVersion in -lz""... $ac_c" 1>&6
+echo "configure:1058: checking for zlibVersion in -lz" >&5
+ac_lib_var=`echo z'_'zlibVersion | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  ac_save_LIBS="$LIBS"
+LIBS="-lz  $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 1066 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char zlibVersion();
+
+int main() {
+zlibVersion()
+; return 0; }
+EOF
+if { (eval echo configure:1077: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  eval "ac_cv_lib_$ac_lib_var=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  LIBS="$LIBS -lz"
+else
+  echo "$ac_t""no" 1>&6
+ { echo "configure: error: could not find libz" 1>&2; exit 1; }
+
+fi
+
+
+# libpng always needs this
+LIBS="$LIBS -lm"
+
+# Check whether --with-png_lib or --without-png_lib was given.
+if test "${with_png_lib+set}" = set; then
+  withval="$with_png_lib"
+  :
+fi
+
+if test "X$with_png_lib" != "X"; then
+  LDFLAGS="$LDFLAGS -L$with_png_lib"
+fi
+
+echo $ac_n "checking for png_create_read_struct in -lpng""... $ac_c" 1>&6
+echo "configure:1114: checking for png_create_read_struct in -lpng" >&5
+ac_lib_var=`echo png'_'png_create_read_struct | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  ac_save_LIBS="$LIBS"
+LIBS="-lpng  $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 1122 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char png_create_read_struct();
+
+int main() {
+png_create_read_struct()
+; return 0; }
+EOF
+if { (eval echo configure:1133: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+  rm -rf conftest*
+  eval "ac_cv_lib_$ac_lib_var=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  LIBS="-lpng $LIBS"
+else
+  echo "$ac_t""no" 1>&6
+ { echo "configure: error: could not find libpng" 1>&2; exit 1; }
+
+fi
+
+
+
+
+
+
+echo $ac_n "checking for location of png includes""... $ac_c" 1>&6
+echo "configure:1161: checking for location of png includes" >&5
+# Check whether --with-png-includes or --without-png-includes was given.
+if test "${with_png_includes+set}" = set; then
+  withval="$with_png_includes"
+  :
+fi
+
+if test "X$with_png_includes" != "X"; then
+  PNG_INCLUDE=$with_png_includes
+fi
+if test ! -f "$PNG_INCLUDE/png.h"; then
+  { echo "configure: error: could not find png.h in $PNG_INCLUDE" 1>&2; exit 1; }
+fi
+if test ! -f "$PNG_INCLUDE/pngconf.h"; then
+  { echo "configure: error: could not find pngconf.h in $PNG_INCLUDE" 1>&2; exit 1; }
+fi
+echo "$ac_t""$PNG_INCLUDE" 1>&6
+
+
+
+echo $ac_n "checking for location of zlib includes""... $ac_c" 1>&6
+echo "configure:1182: checking for location of zlib includes" >&5
+# Check whether --with-zlib-includes or --without-zlib-includes was given.
+if test "${with_zlib_includes+set}" = set; then
+  withval="$with_zlib_includes"
+  :
+fi
+
+if test "X$with_zlib_includes" != "X"; then
+  ZLIB_INCLUDE=$with_zlib_includes
+fi
+if test ! -f "$ZLIB_INCLUDE/zlib.h"; then
+  { echo "configure: error: could not find zlib.h in $ZLIB_INCLUDE" 1>&2; exit 1; }
+fi
+if test ! -f "$ZLIB_INCLUDE/zconf.h"; then
+  { echo "configure: error: could not find zconf.h in $ZLIB_INCLUDE" 1>&2; exit 1; }
+fi
+echo "$ac_t""$ZLIB_INCLUDE" 1>&6
+
+
+
+## I have no idea why autoconf makes me need to do this.
+## Of course on M$DOS it should be .exe
+EXEEXT=
+
+
+
+
+trap '' 1 2 15
+cat > confcache <<\EOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs.  It is not useful on other systems.
+# If it contains results you don't want to keep, you may remove or edit it.
+#
+# By default, configure uses ./config.cache as the cache file,
+# creating it if it does not exist already.  You can give configure
+# the --cache-file=FILE option to use a different cache file; that is
+# what configure does when it calls configure scripts in
+# subdirectories, so they share the cache.
+# Giving --cache-file=/dev/null disables caching, for debugging configure.
+# config.status only pays attention to the cache file if you give it the
+# --recheck option to rerun configure.
+#
+EOF
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, don't put newlines in cache variables' values.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(set) 2>&1 |
+  case `(ac_space=' '; set) 2>&1` in
+  *ac_space=\ *)
+    # `set' does not quote correctly, so add quotes (double-quote substitution
+    # turns \\\\ into \\, and sed turns \\ into \).
+    sed -n \
+      -e "s/'/'\\\\''/g" \
+      -e "s/^\\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\\)=\\(.*\\)/\\1=\${\\1='\\2'}/p"
+    ;;
+  *)
+    # `set' quotes correctly as required by POSIX, so do not add quotes.
+    sed -n -e 's/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=${\1=\2}/p'
+    ;;
+  esac >> confcache
+if cmp -s $cache_file confcache; then
+  :
+else
+  if test -w $cache_file; then
+    echo "updating cache $cache_file"
+    cat confcache > $cache_file
+  else
+    echo "not updating unwritable cache $cache_file"
+  fi
+fi
+rm -f confcache
+
+trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+# Any assignment to VPATH causes Sun make to only execute
+# the first set of double-colon rules, so remove it if not needed.
+# If there is a colon in the path, we need to keep it.
+if test "x$srcdir" = x.; then
+  ac_vpsub='/^[ 	]*VPATH[ 	]*=[^:]*$/d'
+fi
+
+trap 'rm -f $CONFIG_STATUS conftest*; exit 1' 1 2 15
+
+# Transform confdefs.h into DEFS.
+# Protect against shell expansion while executing Makefile rules.
+# Protect against Makefile macro expansion.
+cat > conftest.defs <<\EOF
+s%#define \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%-D\1=\2%g
+s%[ 	`~#$^&*(){}\\|;'"<>?]%\\&%g
+s%\[%\\&%g
+s%\]%\\&%g
+s%\$%$$%g
+EOF
+DEFS=`sed -f conftest.defs confdefs.h | tr '\012' ' '`
+rm -f conftest.defs
+
+
+# Without the "./", some shells look in PATH for config.status.
+: ${CONFIG_STATUS=./config.status}
+
+echo creating $CONFIG_STATUS
+rm -f $CONFIG_STATUS
+cat > $CONFIG_STATUS <<EOF
+#! /bin/sh
+# Generated automatically by configure.
+# Run this file to recreate the current configuration.
+# This directory was configured as follows,
+# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+#
+# $0 $ac_configure_args
+#
+# Compiler output produced by configure, useful for debugging
+# configure, is in ./config.log if it exists.
+
+ac_cs_usage="Usage: $CONFIG_STATUS [--recheck] [--version] [--help]"
+for ac_option
+do
+  case "\$ac_option" in
+  -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+    echo "running \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion"
+    exec \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion ;;
+  -version | --version | --versio | --versi | --vers | --ver | --ve | --v)
+    echo "$CONFIG_STATUS generated by autoconf version 2.12"
+    exit 0 ;;
+  -help | --help | --hel | --he | --h)
+    echo "\$ac_cs_usage"; exit 0 ;;
+  *) echo "\$ac_cs_usage"; exit 1 ;;
+  esac
+done
+
+ac_given_srcdir=$srcdir
+ac_given_INSTALL="$INSTALL"
+
+trap 'rm -fr `echo "Makefile" | sed "s/:[^ ]*//g"` conftest*; exit 1' 1 2 15
+EOF
+cat >> $CONFIG_STATUS <<EOF
+
+# Protect against being on the right side of a sed subst in config.status.
+sed 's/%@/@@/; s/@%/@@/; s/%g\$/@g/; /@g\$/s/[\\\\&%]/\\\\&/g;
+ s/@@/%@/; s/@@/@%/; s/@g\$/%g/' > conftest.subs <<\\CEOF
+$ac_vpsub
+$extrasub
+s%@CFLAGS@%$CFLAGS%g
+s%@CPPFLAGS@%$CPPFLAGS%g
+s%@CXXFLAGS@%$CXXFLAGS%g
+s%@DEFS@%$DEFS%g
+s%@LDFLAGS@%$LDFLAGS%g
+s%@LIBS@%$LIBS%g
+s%@exec_prefix@%$exec_prefix%g
+s%@prefix@%$prefix%g
+s%@program_transform_name@%$program_transform_name%g
+s%@bindir@%$bindir%g
+s%@sbindir@%$sbindir%g
+s%@libexecdir@%$libexecdir%g
+s%@datadir@%$datadir%g
+s%@sysconfdir@%$sysconfdir%g
+s%@sharedstatedir@%$sharedstatedir%g
+s%@localstatedir@%$localstatedir%g
+s%@libdir@%$libdir%g
+s%@includedir@%$includedir%g
+s%@oldincludedir@%$oldincludedir%g
+s%@infodir@%$infodir%g
+s%@mandir@%$mandir%g
+s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
+s%@INSTALL_DATA@%$INSTALL_DATA%g
+s%@INSTALL_SCRIPT@%$INSTALL_SCRIPT%g
+s%@PACKAGE@%$PACKAGE%g
+s%@VERSION@%$VERSION%g
+s%@ACLOCAL@%$ACLOCAL%g
+s%@AUTOCONF@%$AUTOCONF%g
+s%@AUTOMAKE@%$AUTOMAKE%g
+s%@AUTOHEADER@%$AUTOHEADER%g
+s%@MAKEINFO@%$MAKEINFO%g
+s%@SET_MAKE@%$SET_MAKE%g
+s%@CC@%$CC%g
+s%@PNG_INCLUDE@%$PNG_INCLUDE%g
+s%@ZLIB_INCLUDE@%$ZLIB_INCLUDE%g
+s%@EXEEXT@%$EXEEXT%g
+
+CEOF
+EOF
+
+cat >> $CONFIG_STATUS <<\EOF
+
+# Split the substitutions into bite-sized pieces for seds with
+# small command number limits, like on Digital OSF/1 and HP-UX.
+ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script.
+ac_file=1 # Number of current file.
+ac_beg=1 # First line for current file.
+ac_end=$ac_max_sed_cmds # Line after last line for current file.
+ac_more_lines=:
+ac_sed_cmds=""
+while $ac_more_lines; do
+  if test $ac_beg -gt 1; then
+    sed "1,${ac_beg}d; ${ac_end}q" conftest.subs > conftest.s$ac_file
+  else
+    sed "${ac_end}q" conftest.subs > conftest.s$ac_file
+  fi
+  if test ! -s conftest.s$ac_file; then
+    ac_more_lines=false
+    rm -f conftest.s$ac_file
+  else
+    if test -z "$ac_sed_cmds"; then
+      ac_sed_cmds="sed -f conftest.s$ac_file"
+    else
+      ac_sed_cmds="$ac_sed_cmds | sed -f conftest.s$ac_file"
+    fi
+    ac_file=`expr $ac_file + 1`
+    ac_beg=$ac_end
+    ac_end=`expr $ac_end + $ac_max_sed_cmds`
+  fi
+done
+if test -z "$ac_sed_cmds"; then
+  ac_sed_cmds=cat
+fi
+EOF
+
+cat >> $CONFIG_STATUS <<EOF
+
+CONFIG_FILES=\${CONFIG_FILES-"Makefile"}
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+for ac_file in .. $CONFIG_FILES; do if test "x$ac_file" != x..; then
+  # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+  case "$ac_file" in
+  *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+       ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+  *) ac_file_in="${ac_file}.in" ;;
+  esac
+
+  # Adjust a relative srcdir, top_srcdir, and INSTALL for subdirectories.
+
+  # Remove last slash and all that follows it.  Not all systems have dirname.
+  ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+  if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+    # The file is in a subdirectory.
+    test ! -d "$ac_dir" && mkdir "$ac_dir"
+    ac_dir_suffix="/`echo $ac_dir|sed 's%^\./%%'`"
+    # A "../" for each directory in $ac_dir_suffix.
+    ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'`
+  else
+    ac_dir_suffix= ac_dots=
+  fi
+
+  case "$ac_given_srcdir" in
+  .)  srcdir=.
+      if test -z "$ac_dots"; then top_srcdir=.
+      else top_srcdir=`echo $ac_dots|sed 's%/$%%'`; fi ;;
+  /*) srcdir="$ac_given_srcdir$ac_dir_suffix"; top_srcdir="$ac_given_srcdir" ;;
+  *) # Relative path.
+    srcdir="$ac_dots$ac_given_srcdir$ac_dir_suffix"
+    top_srcdir="$ac_dots$ac_given_srcdir" ;;
+  esac
+
+  case "$ac_given_INSTALL" in
+  [/$]*) INSTALL="$ac_given_INSTALL" ;;
+  *) INSTALL="$ac_dots$ac_given_INSTALL" ;;
+  esac
+
+  echo creating "$ac_file"
+  rm -f "$ac_file"
+  configure_input="Generated automatically from `echo $ac_file_in|sed 's%.*/%%'` by configure."
+  case "$ac_file" in
+  *Makefile*) ac_comsub="1i\\
+# $configure_input" ;;
+  *) ac_comsub= ;;
+  esac
+
+  ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+  sed -e "$ac_comsub
+s%@configure_input@%$configure_input%g
+s%@srcdir@%$srcdir%g
+s%@top_srcdir@%$top_srcdir%g
+s%@INSTALL@%$INSTALL%g
+" $ac_file_inputs | (eval "$ac_sed_cmds") > $ac_file
+fi; done
+rm -f conftest.s*
+
+EOF
+cat >> $CONFIG_STATUS <<EOF
+
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+
+exit 0
+EOF
+chmod +x $CONFIG_STATUS
+rm -fr confdefs* $ac_clean_files
+test "$no_create" = yes || ${CONFIG_SHELL-/bin/sh} $CONFIG_STATUS || exit 1
+
diff --git a/configure.in b/configure.in
new file mode 100644
index 000000000..55888e3ba
--- /dev/null
+++ b/configure.in
@@ -0,0 +1,145 @@
+dnl -*- shell-script -*-
+dnl
+dnl Process this file with autoconf to produce a configure script.
+dnl
+dnl $Source: /home/cur/djb1/develop/pngmeta/pngmeta/RCS/configure.in,v $
+dnl
+dnl $Id: configure.in,v 1.4 2000/01/31 13:52:24 djb1 Exp $
+dnl
+dnl (C) Copyright 1998, Dave Beckett, University of Kent at Canterbury
+dnl
+
+AC_REVISION($Revision: 1.4 $)
+AC_INIT(pngmeta.c)
+AM_INIT_AUTOMAKE(pngmeta, [1.10])
+AC_PREREQ(2.12)
+
+dnl Checks for programs.
+AC_PROG_CC
+
+
+
+
+# Allow use of libpng and zlib from raw distributions
+PNG_INCLUDE=/usr/include # prefix?
+AC_ARG_WITH(png,
+[  --with-png=DIR          DIR is root for libpng distribution])
+
+AC_MSG_CHECKING(for local copy of libpng distribution)
+if test "X$with_png" = "X"; then
+  for dir in libpng-[0-9]* libpng ../libpng-[0-9]* ../libpng; do
+    if test -d $dir -a -f $dir/png.h; then
+      with_png=$dir
+      LIBS="$LIBS -lpng"
+      break
+    fi
+  done
+fi
+if test "X$with_png" != "X"; then
+  AC_MSG_RESULT($with_png)
+  LDFLAGS="$LDFLAGS -L$with_png"
+  PNG_INCLUDE=$with_png
+else
+  AC_MSG_RESULT(no)
+fi
+
+
+ZLIB_INCLUDE=/usr/include # prefix?
+AC_ARG_WITH(zlib,
+[  --with-zlib=DIR         DIR is root for libz distribution])
+
+AC_MSG_CHECKING(for local copy of zlib distribution)
+if test "X$with_zlib" = "X"; then
+  for dir in zlib-[0-9]* zlib ../zlib-[0-9]* ../zlib; do
+    if test -d $dir -a -f $dir/zlib.h; then
+      with_zlib=$dir
+      LIBS="$LIBS -lz"
+      break
+    fi
+  done
+fi
+if test "X$with_zlib" != "X"; then
+  AC_MSG_RESULT($with_zlib)
+  LDFLAGS="$LDFLAGS -L$with_zlib"
+  ZLIB_INCLUDE=$with_zlib
+else
+  AC_MSG_RESULT(no)
+fi
+
+
+
+dnl Checks for libraries.
+
+# Allow use of libpng and zlib from installed areas
+AC_ARG_WITH(zlib_lib,
+[  --with-zlib-lib=LIB     LIB is path to libz.a])
+if test "X$with_zlib_lib" != "X"; then
+  LDFLAGS="$LDFLAGS -L$with_zlib_lib"
+fi
+
+AC_CHECK_LIB(z, zlibVersion, [LIBS="$LIBS -lz"],
+[ AC_MSG_ERROR(could not find libz)]
+)
+
+# libpng always needs this
+LIBS="$LIBS -lm"
+
+AC_ARG_WITH(png_lib,
+[  --with-png-lib=LIB      LIB is path to libpng.a])
+if test "X$with_png_lib" != "X"; then
+  LDFLAGS="$LDFLAGS -L$with_png_lib"
+fi
+
+AC_CHECK_LIB(png, png_create_read_struct, [LIBS="-lpng $LIBS"],
+[ AC_MSG_ERROR(could not find libpng)]
+)
+
+
+
+
+
+dnl Checks for header files.
+AC_MSG_CHECKING(for location of png includes)
+AC_ARG_WITH(png-includes,
+[  --with-png-includes=DIR DIR is path where PNG header files can be
+                          found, defaults to /usr/include])
+if test "X$with_png_includes" != "X"; then
+  PNG_INCLUDE=$with_png_includes
+fi
+if test ! -f "$PNG_INCLUDE/png.h"; then
+  AC_MSG_ERROR(could not find png.h in $PNG_INCLUDE)
+fi
+if test ! -f "$PNG_INCLUDE/pngconf.h"; then
+  AC_MSG_ERROR(could not find pngconf.h in $PNG_INCLUDE)
+fi
+AC_MSG_RESULT($PNG_INCLUDE)
+AC_SUBST(PNG_INCLUDE)
+
+
+AC_MSG_CHECKING(for location of zlib includes)
+AC_ARG_WITH(zlib-includes,
+[  --with-zlib-includes=DIR DIR is path where ZLIB header files can be
+                           found, defaults to /usr/include])
+if test "X$with_zlib_includes" != "X"; then
+  ZLIB_INCLUDE=$with_zlib_includes
+fi
+if test ! -f "$ZLIB_INCLUDE/zlib.h"; then
+  AC_MSG_ERROR(could not find zlib.h in $ZLIB_INCLUDE)
+fi
+if test ! -f "$ZLIB_INCLUDE/zconf.h"; then
+  AC_MSG_ERROR(could not find zconf.h in $ZLIB_INCLUDE)
+fi
+AC_MSG_RESULT($ZLIB_INCLUDE)
+AC_SUBST(ZLIB_INCLUDE)
+
+
+## I have no idea why autoconf makes me need to do this.
+## Of course on M$DOS it should be .exe
+EXEEXT=
+AC_SUBST(EXEEXT)
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+
+dnl Checks for library functions.
+
+AC_OUTPUT(Makefile)
diff --git a/ct1n0g04.png b/ct1n0g04.png
new file mode 100644
index 000000000..5d93799a5
--- /dev/null
+++ b/ct1n0g04.png
diff --git a/ctzn0g04.png b/ctzn0g04.png
new file mode 100644
index 000000000..01b227015
--- /dev/null
+++ b/ctzn0g04.png
diff --git a/install-sh b/install-sh
new file mode 100755
index 000000000..e8436696c
--- /dev/null
+++ b/install-sh
@@ -0,0 +1,250 @@
+#!/bin/sh
+#
+# install - install a program, script, or datafile
+# This comes from X11R5 (mit/util/scripts/install.sh).
+#
+# Copyright 1991 by the Massachusetts Institute of Technology
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission.  M.I.T. makes no representations about the
+# suitability of this software for any purpose.  It is provided "as is"
+# without express or implied warranty.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.  It can only install one file at a time, a restriction
+# shared with many OS's install programs.
+
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit="${DOITPROG-}"
+
+
+# put in absolute paths if you don't have them in your path; or use env. vars.
+
+mvprog="${MVPROG-mv}"
+cpprog="${CPPROG-cp}"
+chmodprog="${CHMODPROG-chmod}"
+chownprog="${CHOWNPROG-chown}"
+chgrpprog="${CHGRPPROG-chgrp}"
+stripprog="${STRIPPROG-strip}"
+rmprog="${RMPROG-rm}"
+mkdirprog="${MKDIRPROG-mkdir}"
+
+transformbasename=""
+transform_arg=""
+instcmd="$mvprog"
+chmodcmd="$chmodprog 0755"
+chowncmd=""
+chgrpcmd=""
+stripcmd=""
+rmcmd="$rmprog -f"
+mvcmd="$mvprog"
+src=""
+dst=""
+dir_arg=""
+
+while [ x"$1" != x ]; do
+    case $1 in
+	-c) instcmd="$cpprog"
+	    shift
+	    continue;;
+
+	-d) dir_arg=true
+	    shift
+	    continue;;
+
+	-m) chmodcmd="$chmodprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-o) chowncmd="$chownprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-g) chgrpcmd="$chgrpprog $2"
+	    shift
+	    shift
+	    continue;;
+
+	-s) stripcmd="$stripprog"
+	    shift
+	    continue;;
+
+	-t=*) transformarg=`echo $1 | sed 's/-t=//'`
+	    shift
+	    continue;;
+
+	-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
+	    shift
+	    continue;;
+
+	*)  if [ x"$src" = x ]
+	    then
+		src=$1
+	    else
+		# this colon is to work around a 386BSD /bin/sh bug
+		:
+		dst=$1
+	    fi
+	    shift
+	    continue;;
+    esac
+done
+
+if [ x"$src" = x ]
+then
+	echo "install:	no input file specified"
+	exit 1
+else
+	true
+fi
+
+if [ x"$dir_arg" != x ]; then
+	dst=$src
+	src=""
+	
+	if [ -d $dst ]; then
+		instcmd=:
+	else
+		instcmd=mkdir
+	fi
+else
+
+# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
+# might cause directories to be created, which would be especially bad 
+# if $src (and thus $dsttmp) contains '*'.
+
+	if [ -f $src -o -d $src ]
+	then
+		true
+	else
+		echo "install:  $src does not exist"
+		exit 1
+	fi
+	
+	if [ x"$dst" = x ]
+	then
+		echo "install:	no destination specified"
+		exit 1
+	else
+		true
+	fi
+
+# If destination is a directory, append the input filename; if your system
+# does not like double slashes in filenames, you may need to add some logic
+
+	if [ -d $dst ]
+	then
+		dst="$dst"/`basename $src`
+	else
+		true
+	fi
+fi
+
+## this sed command emulates the dirname command
+dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+
+# Make sure that the destination directory exists.
+#  this part is taken from Noah Friedman's mkinstalldirs script
+
+# Skip lots of stat calls in the usual case.
+if [ ! -d "$dstdir" ]; then
+defaultIFS='	
+'
+IFS="${IFS-${defaultIFS}}"
+
+oIFS="${IFS}"
+# Some sh's can't handle IFS=/ for some reason.
+IFS='%'
+set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
+IFS="${oIFS}"
+
+pathcomp=''
+
+while [ $# -ne 0 ] ; do
+	pathcomp="${pathcomp}${1}"
+	shift
+
+	if [ ! -d "${pathcomp}" ] ;
+        then
+		$mkdirprog "${pathcomp}"
+	else
+		true
+	fi
+
+	pathcomp="${pathcomp}/"
+done
+fi
+
+if [ x"$dir_arg" != x ]
+then
+	$doit $instcmd $dst &&
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
+else
+
+# If we're going to rename the final executable, determine the name now.
+
+	if [ x"$transformarg" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		dstfile=`basename $dst $transformbasename | 
+			sed $transformarg`$transformbasename
+	fi
+
+# don't allow the sed command to completely eliminate the filename
+
+	if [ x"$dstfile" = x ] 
+	then
+		dstfile=`basename $dst`
+	else
+		true
+	fi
+
+# Make a temp file name in the proper directory.
+
+	dsttmp=$dstdir/#inst.$$#
+
+# Move or copy the file name to the temp name
+
+	$doit $instcmd $src $dsttmp &&
+
+	trap "rm -f ${dsttmp}" 0 &&
+
+# and set any options; do chmod last to preserve setuid bits
+
+# If any of these fail, we abort the whole thing.  If we want to
+# ignore errors from any of these, just make sure not to ignore
+# errors from the above "$doit $instcmd $src $dsttmp" command.
+
+	if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
+	if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
+	if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
+	if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
+
+# Now rename the file to the real destination.
+
+	$doit $rmcmd -f $dstdir/$dstfile &&
+	$doit $mvcmd $dsttmp $dstdir/$dstfile 
+
+fi &&
+
+
+exit 0
diff --git a/missing b/missing
new file mode 100755
index 000000000..cbe2b0ef0
--- /dev/null
+++ b/missing
@@ -0,0 +1,188 @@
+#! /bin/sh
+# Common stub for a few missing GNU programs while installing.
+# Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+# Franc,ois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# 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, 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.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try \`$0 --help' for more information"
+  exit 1
+fi
+
+case "$1" in
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an
+error status if there is no known handling for PROGRAM.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+
+Supported PROGRAM values:
+  aclocal      touch file \`aclocal.m4'
+  autoconf     touch file \`configure'
+  autoheader   touch file \`config.h.in'
+  automake     touch all \`Makefile.in' files
+  bison        create \`y.tab.[ch]', if possible, from existing .[ch]
+  flex         create \`lex.yy.c', if possible, from existing .c
+  lex          create \`lex.yy.c', if possible, from existing .c
+  makeinfo     touch the output file
+  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]"
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing - GNU libit 0.0"
+    ;;
+
+  -*)
+    echo 1>&2 "$0: Unknown \`$1' option"
+    echo 1>&2 "Try \`$0 --help' for more information"
+    exit 1
+    ;;
+
+  aclocal)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified \`acinclude.m4' or \`configure.in'.  You might want
+         to install the \`Automake' and \`Perl' packages.  Grab them from
+         any GNU archive site."
+    touch aclocal.m4
+    ;;
+
+  autoconf)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified \`configure.in'.  You might want to install the
+         \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
+         archive site."
+    touch configure
+    ;;
+
+  autoheader)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified \`acconfig.h' or \`configure.in'.  You might want
+         to install the \`Autoconf' and \`GNU m4' packages.  Grab them
+         from any GNU archive site."
+    files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER([^):]*:\([^)]*\)).*/\1/p' configure.in`
+    if test -z "$files"; then
+      files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^):]*\)).*/\1/p' configure.in`
+      test -z "$files" || files="$files.in"
+    else
+      files=`echo "$files" | sed -e 's/:/ /g'`
+    fi
+    test -z "$files" && files="config.h.in"
+    touch $files
+    ;;
+
+  automake)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified \`Makefile.am', \`acinclude.m4' or \`configure.in'.
+         You might want to install the \`Automake' and \`Perl' packages.
+         Grab them from any GNU archive site."
+    find . -type f -name Makefile.am -print \
+      | sed 's/^\(.*\).am$/touch \1.in/' \
+      | sh
+    ;;
+
+  bison|yacc)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified a \`.y' file.  You may need the \`Bison' package
+         in order for those modifications to take effect.  You can get
+         \`Bison' from any GNU archive site."
+    rm -f y.tab.c y.tab.h
+    if [ $# -ne 1 ]; then
+        eval LASTARG="\${$#}"
+	case "$LASTARG" in
+	*.y)
+	    SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
+	    if [ -f "$SRCFILE" ]; then
+	         cp "$SRCFILE" y.tab.c
+	    fi
+	    SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
+	    if [ -f "$SRCFILE" ]; then
+	         cp "$SRCFILE" y.tab.h
+	    fi
+	  ;;
+	esac
+    fi
+    if [ ! -f y.tab.h ]; then
+	echo >y.tab.h
+    fi
+    if [ ! -f y.tab.c ]; then
+	echo 'main() { return 0; }' >y.tab.c
+    fi
+    ;;
+
+  lex|flex)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified a \`.l' file.  You may need the \`Flex' package
+         in order for those modifications to take effect.  You can get
+         \`Flex' from any GNU archive site."
+    rm -f lex.yy.c
+    if [ $# -ne 1 ]; then
+        eval LASTARG="\${$#}"
+	case "$LASTARG" in
+	*.l)
+	    SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
+	    if [ -f "$SRCFILE" ]; then
+	         cp "$SRCFILE" lex.yy.c
+	    fi
+	  ;;
+	esac
+    fi
+    if [ ! -f lex.yy.c ]; then
+	echo 'main() { return 0; }' >lex.yy.c
+    fi
+    ;;
+
+  makeinfo)
+    echo 1>&2 "\
+WARNING: \`$1' is missing on your system.  You should only need it if
+         you modified a \`.texi' or \`.texinfo' file, or any other file
+         indirectly affecting the aspect of the manual.  The spurious
+         call might also be the consequence of using a buggy \`make' (AIX,
+         DU, IRIX).  You might want to install the \`Texinfo' package or
+         the \`GNU make' package.  Grab either from any GNU archive site."
+    file=`echo "$*" | sed -n 's/.*-o \([^ ]*\).*/\1/p'`
+    if test -z "$file"; then
+      file=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
+      file=`sed -n '/^@setfilename/ { s/.* \([^ ]*\) *$/\1/; p; q; }' $file`
+    fi
+    touch $file
+    ;;
+
+  *)
+    echo 1>&2 "\
+WARNING: \`$1' is needed, and you do not seem to have it handy on your
+         system.  You might have modified some files without having the
+         proper tools for further handling them.  Check the \`README' file,
+         it often tells you about the needed prerequirements for installing
+         this package.  You may also peek at any GNU archive site, in case
+         some other package would contain this missing \`$1' program."
+    exit 1
+    ;;
+esac
+
+exit 0
diff --git a/mkinstalldirs b/mkinstalldirs
new file mode 100755
index 000000000..a01481be4
--- /dev/null
+++ b/mkinstalldirs
@@ -0,0 +1,40 @@
+#! /bin/sh
+# mkinstalldirs --- make directory hierarchy
+# Author: Noah Friedman <friedman@prep.ai.mit.edu>
+# Created: 1993-05-16
+# Public domain
+
+# $Id: mkinstalldirs,v 1.10 1996/05/03 07:37:52 friedman Exp $
+
+errstatus=0
+
+for file
+do
+   set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'`
+   shift
+
+   pathcomp=
+   for d
+   do
+     pathcomp="$pathcomp$d"
+     case "$pathcomp" in
+       -* ) pathcomp=./$pathcomp ;;
+     esac
+
+     if test ! -d "$pathcomp"; then
+        echo "mkdir $pathcomp" 1>&2
+
+        mkdir "$pathcomp" || lasterr=$?
+
+        if test ! -d "$pathcomp"; then
+  	  errstatus=$lasterr
+        fi
+     fi
+
+     pathcomp="$pathcomp/"
+   done
+done
+
+exit $errstatus
+
+# mkinstalldirs ends here
diff --git a/pngmeta.1 b/pngmeta.1
new file mode 100644
index 000000000..820a997b1
--- /dev/null
+++ b/pngmeta.1
@@ -0,0 +1,139 @@
+.TH PNGMETA 1 "10 March 1998"
+.\"
+.\" Manual page for pngmeta - see end of page for copyright
+.\"
+.\" $Source: /home/cur/djb1/develop/pngmeta/pngmeta/RCS/pngmeta.1,v $
+.\"
+.\" $Id: pngmeta.1,v 1.4 2000/01/31 14:05:45 djb1 Exp $
+.\"
+.SH NAME
+pngmeta \- extract metadata from Portable Network Graphics (PNG) image files
+.SH SYNOPSIS
+.B pngmeta
+.RB [ \--soif ]
+.RB [ \--html ]
+.RB [ \--xrdf ]
+.RB [ \--all ]
+.RB [ \--quiet ]
+.RB [ \--uri\ URI ]
+.RI [ filename ]
+.SH DESCRIPTION
+The
+.I pngmeta
+filter outputs the metadata from Portable Network Graphics (PNG)
+format image files in one of these formats:
+.LP
+1. Simple key: value
+.LP
+2. SOIF format (as used by the Harvest system, version 1.4).
+.IP
+As such it can be used as a Summarizer for the Harvest Essence system.
+It could also be used by other indexers to extract data for
+indexing PNG images.
+.LP
+3. HTML page
+With each element as an element in a descriptive (DL) list
+.LP
+4. XML/RDF
+With each element as an RDF property on the source URI.
+.LP
+In the absence of options, the program operates as a filter,
+accepting input from stdin and sending output to stdout.
+If a single file name is given,
+it is assumed to correspond to a PNG file,
+and is processed.
+.SH FORMAT OPTIONS
+.TP
+.B \--soif
+Format output using (Harvest) SOIF format.  This is the default if
+the program is called PngImage.sum.
+.TP
+.B \--html
+Format output in HTML, with each field/value as an element in a descriptive
+.RB ( DL )
+list.
+.TP
+.B \--xrdf
+Format output in RDF/XML, with each field/value as an element in a descriptive
+.RB ( DL )
+list.
+.SH OTHER OPTIONS
+.TP
+.B \--all
+Output all the information about the image size, depth etc. even if
+not usually printed.
+.TP
+.B \--quiet
+Suppress the output of the banner for plain text output.
+.B \--uri URI
+Set the URI that is used for the SOIF and XML/RDF outputs.  By
+default this will be the filename, or "stdin" if this is the program
+is used as a filter.
+.TP
+.B \--help
+Show a usage message
+.TP
+.B \--version
+Show the program and library versions
+.SH FILES
+.TP 2.2i
+.I pngmeta
+executable
+.SH "SEE ALSO"
+.IR gif2png (1),
+.IR libpng (3),
+.IR pbm (1),
+.IR pgm (1),
+.IR pngcheck (1),
+.IR pngtopnm (1),
+.IR pnm (5),
+.IR pnmgamma (1),
+.IR pnmtopng (1),
+.IR ptot (1),
+.IR tiff2png (1),
+.IR zlib (3)
+.LP
+For information about Harvest and its SOIF format:
+.IP
+http://harvest.cs.colorado.edu/
+.LP
+For
+.IR PNG
+.IP
+http://www.cdrom.com/pub/png/
+.LP
+For
+.IR "libpng library:"
+.IP
+ftp://swrinde.nde.swri.edu/pub/png/src/
+.br
+http://www.cdrom.com/pub/png/src/
+.LP
+For
+.IR zlib
+.IP
+http://www.cdrom.com/pub/infozip/zlib/
+.LP
+For
+.IR "zlib library:"
+.IP
+http://www.cdrom.com/pub/infozip/zlib/
+.SH AUTHORS
+Version 1.10.
+Dave Beckett (D.J.Beckett@ukc.ac.uk).
+.LP
+The
+.IR zlib (3)
+library required by
+.I pngmeta
+is copyright (C) 1995-1996 Jean-loup Gailly and Mark Adler.
+Some code was modified from the code for the
+.IR libpng (3)
+library function
+.B png_read_end()
+which is copyright (c) Guy Eric Schalnat, Andreas Dilger, Glenn
+Randers-Pehrson and others -- see the source for details.
+.LP
+Original UNIX manual page by R. P. C. Rodgers,
+U.S. National Library of Medicine (rodgers@nlm.nih.gov).
+.\" end of man page
diff --git a/pngmeta.c b/pngmeta.c
new file mode 100644
index 000000000..808fb51d1
--- /dev/null
+++ b/pngmeta.c
@@ -0,0 +1,569 @@
+/* pngmeta - PNG metadata filter to text, SOIF or HTML
+
+   For libpng 1.0.0 and zlib version 1.1.1 (or later)
+
+   tested up to libpng 1.0.5o and zlib 1.1.3
+   
+   (C) Copyright Dave Beckett <D.J.Beckett@ukc.ac.uk>,
+   University of Kent at Canterbury, UK
+   http://www.cs.ukc.ac.uk/people/staff/djb1/
+
+   RDF support by daniel.brickley@bristol.ac.uk
+
+   $Source: /home/cur/djb1/develop/pngmeta/pngmeta/RCS/pngmeta.c,v $
+
+   $Id: pngmeta.c,v 1.10 2000/01/31 13:51:46 djb1 Exp $
+   
+   The function png_skip_till_end() is a modified version of
+   png_read_end() from libpng 1.0.0 by
+   Guy Eric Schalnat, Group 42, Inc.
+   Andreas Eric Dilger and Glenn Randers-Pehrson
+   as well as many others.  The original copyright message follows.
+*/
+
+/* pngread.c - read a PNG file
+ *
+ * libpng 1.0.0
+ * For conditions of distribution and use, see copyright notice in png.h
+ * Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
+ * Copyright (c) 1996, 1997 Andreas Dilger
+ * Copyright (c) 1998, Glenn Randers-Pehrson
+ * March 8, 1998
+ *
+ * This file contains routines that an application calls directly to
+ * read a PNG file or stream.
+ */
+
+/* png.h - header file for PNG reference library
+ *
+
+ [DJB: edited to just leave COPYRIGHT NOTICE ]
+
+ *
+ * COPYRIGHT NOTICE:
+ *
+ * The PNG Reference Library is supplied "AS IS".  The Contributing Authors
+ * and Group 42, Inc. disclaim all warranties, expressed or implied,
+ * including, without limitation, the warranties of merchantability and of
+ * fitness for any purpose.  The Contributing Authors and Group 42, Inc.
+ * assume no liability for direct, indirect, incidental, special, exemplary,
+ * or consequential damages, which may result from the use of the PNG
+ * Reference Library, even if advised of the possibility of such damage.
+ *
+ * Permission is hereby granted to use, copy, modify, and distribute this
+ * source code, or portions hereof, for any purpose, without fee, subject
+ * to the following restrictions:
+ * 1. The origin of this source code must not be misrepresented.
+ * 2. Altered versions must be plainly marked as such and must not be
+ *    misrepresented as being the original source.
+ * 3. This Copyright notice may not be removed or altered from any source or
+ *    altered source distribution.
+ *
+ * The Contributing Authors and Group 42, Inc. specifically permit, without
+ * fee, and encourage the use of this source code as a component to
+ * supporting the PNG file format in commercial products.  If you use this
+ * source code in a product, acknowledgment is not required but would be
+ * appreciated.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <strings.h>
+
+/* Needed to access various internal PNG chunk routines */
+#define PNG_INTERNAL
+#include <png.h>
+
+#ifdef __TURBOC__
+#include <mem.h>
+#endif
+
+/* defined so I can write to a file on gui/windowing platforms */
+/*  #define STDERR stderr  */
+#ifdef MSDOS
+#define STDERR stdout	/* for DOS */
+#else
+#define STDERR stderr
+#endif
+
+void png_skip_till_end PNGARG((png_structp png_ptr, png_infop info));
+void html_quote_string PNGARG((FILE *fd, const char *string));
+void print_init PNGARG((FILE *fd, int output_type, const char *filename, const char *uri, int quiet));
+void print_kv PNGARG((FILE *fd, int output_type, const char *field, const char *value));
+void print_finish PNGARG((FILE *fd, int output_type));
+void user_warning_fn PNGARG((png_structp png_ptr, png_const_charp warning_msg));
+
+
+const char *progname;
+
+
+/* read data, ignoring IDATs, till the end of the png file.
+   
+   Will not read past the end of the file, will verify the end is
+   accurate, and will read any comments or time information at the
+   end of the file, if info is not NULL. */
+void
+png_skip_till_end(png_structp png_ptr, png_infop info_ptr)
+{
+   png_byte chunk_length[4];
+   png_uint_32 length;
+
+   length=png_ptr->idat_size;
+   
+  /* Skip IDAT chunks */
+   do
+   {
+     png_crc_finish(png_ptr, length);
+
+     png_read_data(png_ptr, chunk_length, 4);
+     length = png_get_uint_32(chunk_length);
+
+     png_reset_crc(png_ptr);
+     png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+   } while (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4));
+   
+   png_ptr->mode |= PNG_AFTER_IDAT;
+   
+   do
+   {
+     if (!png_memcmp(png_ptr->chunk_name, png_IHDR, 4))
+       png_handle_IHDR(png_ptr, info_ptr, length);
+     else if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
+     {
+       /* Zero length IDATs are legal after the last IDAT has been
+        * read, but not after other chunks have been read.
+        */
+       if (length > 0 || png_ptr->mode & PNG_AFTER_IDAT)
+         png_error(png_ptr, "Too many IDAT's found");
+       else
+         png_crc_finish(png_ptr, 0);
+     }
+#if defined(PNG_READ_tIME_SUPPORTED)
+     else if (!png_memcmp(png_ptr->chunk_name, png_tIME, 4))
+       png_handle_tIME(png_ptr, info_ptr, length);
+#endif
+#if defined(PNG_READ_tEXt_SUPPORTED)
+     else if (!png_memcmp(png_ptr->chunk_name, png_tEXt, 4))
+       png_handle_tEXt(png_ptr, info_ptr, length);
+#endif
+#if defined(PNG_READ_zTXt_SUPPORTED)
+     else if (!png_memcmp(png_ptr->chunk_name, png_zTXt, 4))
+       png_handle_zTXt(png_ptr, info_ptr, length);
+#endif
+     else if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
+       png_handle_IEND(png_ptr, info_ptr, length);
+     else
+       png_handle_unknown(png_ptr, info_ptr, length);
+
+     if (!(png_ptr->mode & PNG_HAVE_IEND)) {
+       png_read_data(png_ptr, chunk_length, 4);
+       length = png_get_uint_32(chunk_length);
+     
+       png_reset_crc(png_ptr);
+       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
+     }
+     
+   } while (!(png_ptr->mode & PNG_HAVE_IEND));
+}
+
+
+#define OUTPUT_TEXT 0
+#define OUTPUT_SOIF 1
+#define OUTPUT_HTML 2
+#define OUTPUT_XRDF 3
+
+
+void html_quote_string(FILE *fd, const char *string)
+{
+  char c;
+  char const * p=string;
+  while ((c = *p++)) {
+    if (c == '&')
+      fputs("&amp;", fd);
+    else if (c== '<')
+      fputs("&lt;", fd);
+    else if (c== '>')
+      fputs("&gt;", fd);
+    else
+      fputc(c, fd);
+  }
+}
+
+
+void print_init(FILE *fd, int output_type, const char *filename,
+                const char *uri, int quiet)
+{
+  switch (output_type)
+    {
+      case OUTPUT_SOIF:
+        if (uri)
+          fprintf(fd, "@FILE { %s\n", uri);
+        else
+          fprintf(fd, "@FILE { %s\n", filename);
+	break;
+      
+      case OUTPUT_HTML:
+	fputs("<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 3.2//EN'>\n", fd);
+	fputs("<HTML>\n<HEAD>\n<TITLE>Metadata for ", fd);
+	html_quote_string(fd, filename); 
+	fputs("</TITLE>\n</HEAD>\n<BODY>\n<H1>Metadata for ", fd);
+	html_quote_string(fd, filename);
+	fputs("</H1>\n<DL>\n", fd);
+	break;
+      
+      case OUTPUT_XRDF:
+        fputs("<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'\n", fd);
+        fputs("         xmlns:s='http://www.tasi.ac.uk/rdf/vocab#'\n", fd);
+        fputs("         xmlns:dc='http://purl.org/dc/elements/1.0/'>\n", fd);
+
+        if (uri)
+          fprintf(fd, "  <s:Image about=\"%s\"\n", uri);
+        else {
+          fputs("  <s:Image about=\"", fd);
+          html_quote_string(fd, filename); 
+          fputs("\">\n", fd);
+        }
+        fputs("    <dc:type>image/png</dc:type>\n", fd);
+
+        break;
+
+      default: /* OUTPUT_TEXT */
+        if (!quiet)
+          fprintf(fd, "%s: PNG metadata for %s:\n", progname, filename);
+    }
+}
+
+
+void print_kv(FILE *fd, int output_type, const char *field, const char *value) 
+{
+  if (*value)
+    switch (output_type)
+      {
+	case OUTPUT_SOIF:
+	  /* SOIF: "KEY{SIZE}:\tVALUE\n" */
+	  fprintf(fd, "%s{%d}:\t%s\n", field, (int)strlen(value), value);
+	  break;
+	
+	case OUTPUT_HTML:
+	  /* HTML: <DT>field</DT>\n<DD><P>value</P></DD>\n" */
+	  fputs("  <DT>", fd);
+	  html_quote_string(fd, field);
+	  fputs("</DT>\n  <DD><P>", fd);
+	  html_quote_string(fd, value);
+	  fputs("</P></DD>\n\n", fd);
+	  break;
+	
+        case OUTPUT_XRDF:
+          /* RDF: simple flat text properties  */
+
+          /* start tag */
+          fputs("    <s:", fd);
+          html_quote_string(fd, field);
+          fputs(">", fd);
+
+          /* If value starts with <RDF, assume it is RDF and don't
+             HTML escape it */
+          if (!strncasecmp(value, "<RDF", 4))
+            fputs(value, fd);
+          else
+            html_quote_string(fd, value);
+
+          /* end tag */
+          fputs("</s:", fd);
+          html_quote_string(fd, field);
+          fputs(">\n", fd);
+          break;
+
+	default: /* OUTPUT_TEXT */
+	  fprintf(fd, "%s: %s\n", field, value);
+      }
+}
+
+
+void print_finish(FILE *fd, int output_type)
+{
+  switch (output_type)
+    {
+      case OUTPUT_SOIF:
+	fputs("}\n", fd);
+	break;
+      
+      case OUTPUT_HTML:
+	fprintf(fd, "</DL>\n\n<SMALL>Created by %s V%s</SMALL>\n\n</BODY>\n</HTML>\n", progname, VERSION);
+	break;
+	
+      case OUTPUT_XRDF:
+        fprintf(fd, "  </s:Image>\n</rdf:RDF>\n\n<!--Created by %s V%s -->\n", progname, VERSION);
+        break;
+        
+      /* case OUTPUT_TEXT / default */
+      /* do nothing */
+    }
+}
+
+
+static const char *png_color_type[] = {
+  "Grayscale",
+  "Undefined type",
+  "RGB",
+  "Palette",
+  "Grayscale with Alpha",
+  "Undefined type",
+  "RGB with Alpha"
+};
+
+
+/* Throw away warnings (die on errors as usual) */
+void user_warning_fn (png_structp png_ptr, png_const_charp warning_msg)
+{
+
+}
+
+
+
+/* MAIN BODY */
+int main(int argc, char *argv[])
+{
+  png_structp png_ptr;
+  png_infop info_ptr;
+  png_infop end_info;
+  FILE *in_fp = stdin;
+  FILE *out_fp = stdout;
+  const char *pngfile = "stdin";
+  int output_type = OUTPUT_TEXT;
+  int quiet = 0;
+  int all = 0;
+  int usingfile = 0;
+  int usage = 0;
+  int help = 0;
+  int version = 0;
+  int i;
+  char *p;
+  char *uri= NULL;
+  
+
+  /* Make progname just become the program name, not the full path -
+     this is file system type specific since / is used as the
+     separator */
+  progname = *argv++; argc--;
+  if((p=strrchr(progname, '/'))) 
+    progname=p+1;
+  
+  
+  /* Automagically output SOIF when this program is called PngImage.sum */
+  if(!strcmp(progname, "PngImage.sum"))
+    output_type = OUTPUT_SOIF;    
+
+  /* Automagically output RDF when this program is called PngImage.rdfsum */
+  if(!strcmp(progname, "PngImage.rdfsum"))
+    output_type = OUTPUT_XRDF;    
+
+  
+  while (*argv) {
+    char *arg=argv[0];
+    int l=strlen(arg);
+    
+    if (*arg != '-')
+      break;
+
+    if(l < 2) {
+      usage=1;
+      break;
+    }
+    
+    if (arg[0] == '-' && arg[1] != '-') {
+      arg++;
+    } else {
+      /* found '--' or equivalent */
+      if (l==2) {
+        argv++;
+        argc--;
+        break;
+      }
+      arg+=2;
+    }
+    
+
+    if (!strcmp(arg, "soif")) {
+      output_type = OUTPUT_SOIF;
+    } else if (!strcmp(arg, "html")) {
+      output_type = OUTPUT_HTML;
+    } else if (!strcmp(arg, "xrdf")) {
+      output_type = OUTPUT_XRDF;
+    } else if (!strcmp(arg, "quiet")) {
+      quiet = 1;
+    } else if (!strcmp(arg, "all")) {
+      all = 1;
+    } else if (!strcmp(arg, "help")) {
+      help = 1;
+      break;
+    } else if (!strcmp(arg, "version")) {
+      version = 1;
+      break;
+    } else if (!strcmp(arg, "uri")) {
+      argv++;
+      argc--;
+      if (!argc) {
+        fprintf(STDERR, "%s: option --uri requires an argument\n", progname);
+        usage=1;
+      } else {
+        uri=*argv;
+      }
+    } else {
+      fprintf(STDERR, "%s: invalid option -- %s\n", progname, arg);
+      usage = 1;
+      break;
+    }
+    argv++;
+    argc--;
+  }
+
+  if (!usage && !help && !version) {
+    if (!argc)
+      /* nop */;
+    else if (argc == 1) {
+      pngfile = *argv;
+      if (!(in_fp = fopen (pngfile, "rb"))) {
+	fprintf(STDERR, "%s: Could not open input file %s - ", progname, pngfile);
+	fflush(STDERR);
+	perror(NULL);
+	exit(1);
+      }
+      usingfile = 1;
+    } else {
+      usage = 1;
+    }
+  } 
+
+
+  if(usage) {
+    fprintf(STDERR, "Try `%s --help' for more information\n", progname);
+    exit(1);
+  }
+  
+  
+  if (help || version) {
+    fprintf(STDERR, "%s %s (built with libpng %s and zlib %s)\n", progname, VERSION, PNG_LIBPNG_VER_STRING, ZLIB_VERSION);
+    if (help) {
+      fprintf(STDERR, "USAGE: %s [OPTIONS]... FILE\n", progname);
+      fprintf(STDERR, "Display metadata information from a PNG image in FILE\n\n");
+      fprintf(STDERR, "  --all          output information about image size etc.\n");
+      fprintf(STDERR, "  --html         format output in HTML format\n");
+      fprintf(STDERR, "  --quiet        suppress output of banner\n");
+      fprintf(STDERR, "  --soif         format output in SOIF format\n");
+      fprintf(STDERR, "  --uri URI      set the URI for SOIF and XML/RDF formats\n");
+      fprintf(STDERR, "  --xrdf         format output in XML/RDF format\n");
+      fprintf(STDERR, "  --help         display this help and exit\n");
+      fprintf(STDERR, "  --version      output version information and exit\n");
+      fprintf(STDERR, "\n(C) Copyright 2000 Dave Beckett, University of Kent at Canterbury\nhttp://www.cs.ukc.ac.uk/people/staff/djb1/\n");
+      fprintf(STDERR, "RDF output by daniel.brickley@bristol.ac.uk\n");
+    }
+    exit(1);
+  }
+
+  png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,
+                                   (void*)NULL, NULL, user_warning_fn);
+  if (!png_ptr) {
+    fprintf(STDERR, "%s: libpng failed to create read structure\n", progname);
+    exit(1);
+  }
+
+  info_ptr = png_create_info_struct(png_ptr);
+  if (!info_ptr)
+  {
+    png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
+    fprintf(STDERR, "%s: libpng failed to create info structure\n", progname);
+    exit(1);
+  }
+
+  /* This is necessary to zero text pointers */
+  end_info = png_create_info_struct(png_ptr);
+  if (!end_info)
+  {
+    png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
+    fprintf(STDERR, "%s: libpng failed to create end info structure\n", progname);
+    exit(1);
+  }
+  
+
+  if (setjmp(png_ptr->jmpbuf))
+  {
+    png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
+    fprintf(STDERR, "%s: libpng read error for %s\n", progname, pngfile);
+    fclose(in_fp);
+    exit(1);
+  }
+  
+
+  /* Initialise data input */
+  png_init_io(png_ptr, in_fp);
+  png_read_info(png_ptr, info_ptr);
+  
+  print_init(out_fp, output_type, pngfile, uri, quiet);
+  
+  if (output_type == OUTPUT_SOIF || all) {
+/*
+  Harvest V1.4 GIF summarizer outputs this:
+    
+  image-format: GIF87|GIF89
+  image-colors: [bits-per-pixel]
+  Comment: [GIF Comment Extension text]
+  image-width: [w]
+  image-height: [h]
+  image-type: interlaced|non-interlaced
+  thumbnail-data: [data for 64x64 GIF image]
+  
+  The latter is done via:
+    giftopnm giffile | pnmscale -width 64 -height 64 | ppmquant 256 | ppmtogif
+    
+*/
+    char value[80]; /* Sorry for the fixed-size buffer (big enough) */
+    
+    print_kv(out_fp, output_type, "image-format", "PNG");
+    
+    sprintf(value, "%d", info_ptr->bit_depth);
+    print_kv(out_fp, output_type, "image-colors", value);
+    
+    sprintf(value, "%ld", info_ptr->width);
+    print_kv(out_fp, output_type, "image-width", value);
+    
+    sprintf(value, "%ld", info_ptr->height);
+    print_kv(out_fp, output_type, "image-height", value);
+    
+    sprintf(value, "%s, %sinterlaced",
+	    (info_ptr->color_type>6) ? png_color_type[1] : png_color_type[info_ptr->color_type],
+	    info_ptr->interlace_type ? "" : "non-");
+
+    print_kv(out_fp, output_type, "image-type", value);
+  }
+  
+  /* Local function */
+  png_skip_till_end(png_ptr, end_info);
+  
+  
+  /* Print text keywords before IDAT */
+  for (i = 0; i < info_ptr->num_text; i++)
+    print_kv(out_fp, output_type, info_ptr->text[i].key, info_ptr->text[i].text);
+  
+  /* Print text keywords after IDAT */
+  for (i = 0; i < end_info->num_text; i++)
+    print_kv(out_fp, output_type, end_info->text[i].key, end_info->text[i].text);
+  
+  /* Print modification time (tIME chunk) if present */
+  if (info_ptr->valid & PNG_INFO_tIME)
+    print_kv(out_fp, output_type, "Modification Time",
+             png_convert_to_rfc1123(png_ptr, &info_ptr->mod_time));
+  else if (end_info->valid & PNG_INFO_tIME)
+    print_kv(out_fp, output_type, "Modification Time",
+             png_convert_to_rfc1123(png_ptr, &end_info->mod_time));
+  
+  print_finish(out_fp, output_type);
+  
+  
+  /* Cleanup */
+  png_read_destroy(png_ptr, info_ptr, end_info);
+
+  fclose(in_fp);
+  
+  exit (0);
+}
diff --git a/pngmeta.spec b/pngmeta.spec
new file mode 100644
index 000000000..83de94f0e
--- /dev/null
+++ b/pngmeta.spec
@@ -0,0 +1,46 @@
+#
+# pngmeta -- Get Metadata from PNG images
+#
+%define version 1.10
+%define name pngmeta
+Summary: Display metadata information from PNG images
+Name: %{name}
+Version: %{version}
+Release: 1
+Copyright: Freely Distributable
+Group: Applications/Graphics
+Source: http://www.cs.ukc.ac.uk/people/staff/djb1/software/%{name}-%{version}.tar.gz
+URL: http://www.cs.ukc.ac.uk/people/staff/djb1/software
+Provides: pngmeta
+Requires: libpng.so.2 zlib
+BuildRoot: /tmp/rpmbuild_%{name}
+
+%description
+This small filter program extracts metadata from PNG images and
+displays them as either HTML, SOIF, RDF/XML or simple fields and
+values.
+
+%prep
+rm -rf $RPM_BUILD_ROOT
+rm -rf $RPM_BUILD_DIR/%{name}-%{version}
+
+%setup
+
+%build
+CFLAGS="$RPM_OPT_FLAGS" ./configure --prefix=/usr
+make
+
+%install
+make install-strip prefix=$RPM_BUILD_ROOT/usr
+
+%files
+
+%doc %attr (-,root,root) NEWS
+%doc %attr (-,root,root) README
+
+%attr (-,root,root) /usr/man/man1/pngmeta.1
+%attr (755,root,root) /usr/bin/pngmeta
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+rm -rf $RPM_BUILD_DIR/%{name}-%{version}
diff --git a/test1 b/test1
new file mode 100755
index 000000000..52d88d5b7
--- /dev/null
+++ b/test1
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo 'Testing uncompressed text chunk - tEXT (plain format)'
+./pngmeta -quiet ct1n0g04.png | diff -c test1.xpt -
diff --git a/test1.xpt b/test1.xpt
new file mode 100644
index 000000000..eeb0a348e
--- /dev/null
+++ b/test1.xpt
@@ -0,0 +1,11 @@
+Title: PngSuite
+Author: Willem A.J. van Schaik
+(gwillem@ntuvax.ntu.ac.sg)
+Copyright: Copyright Willem van Schaik, Singapore 1995
+Description: A compilation of a set of images created to test the
+various color-types of the PNG format. Included are
+black&white, color, paletted, with alpha channel, with
+transparency formats. All bit-depths allowed according
+to the spec are present.
+Software: Created on a NeXTstation color using "pnmtopng".
+Disclaimer: Freeware.
diff --git a/test2 b/test2
new file mode 100755
index 000000000..21a6edd00
--- /dev/null
+++ b/test2
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo 'Testing compressed text chunk   - zTXT (SOIF format)'
+./pngmeta -soif -quiet ctzn0g04.png | diff -c test2.xpt -
diff --git a/test2.xpt b/test2.xpt
new file mode 100644
index 000000000..ebcc5357b
--- /dev/null
+++ b/test2.xpt
@@ -0,0 +1,18 @@
+@FILE { ctzn0g04.png
+image-format{3}:	PNG
+image-colors{1}:	4
+image-width{2}:	32
+image-height{2}:	32
+image-type{25}:	Grayscale, non-interlaced
+Title{8}:	PngSuite
+Author{49}:	Willem A.J. van Schaik
+(gwillem@ntuvax.ntu.ac.sg)
+Copyright{43}:	Copyright Willem van Schaik, Singapore 1995
+Description{239}:	A compilation of a set of images created to test the
+various color-types of the PNG format. Included are
+black&white, color, paletted, with alpha channel, with
+transparency formats. All bit-depths allowed according
+to the spec are present.
+Software{48}:	Created on a NeXTstation color using "pnmtopng".
+Disclaimer{9}:	Freeware.
+}
diff --git a/test3 b/test3
new file mode 100755
index 000000000..4a995b3d1
--- /dev/null
+++ b/test3
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo 'Testing HTML output'
+./pngmeta -html -quiet 8859.png | diff -c test3.xpt -
diff --git a/test3.xpt b/test3.xpt
new file mode 100644
index 000000000..f72884f99
--- /dev/null
+++ b/test3.xpt
@@ -0,0 +1,39 @@
+<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 3.2//EN'>
+<HTML>
+<HEAD>
+<TITLE>Metadata for 8859.png</TITLE>
+</HEAD>
+<BODY>
+<H1>Metadata for 8859.png</H1>
+<DL>
+  <DT>Title</DT>
+  <DD><P>ISO 8859-1 characters</P></DD>
+
+  <DT>Description</DT>
+  <DD><P>Here are all the printable characters from the 
+ISO Latin-1 coded character set: hex codes 20 to 7E
+and A0 to FF. That includes a space (20) and a 
+non-breaking space (A0).</P></DD>
+
+  <DT>Test data</DT>
+  <DD><P>! " # $ % &amp; ' ( ) * + , - . /
+0 1 2 3 4 5 6 7 8 9 : ; &lt; = &gt; ?
+@ A B C D E F G H I J K L M N O
+P Q R S T U V W X Y Z [ \ ] ^ _
+` a b c d e f g h i j k l m n o
+p q r s t u v w x y z { | } ~
+
+  ¡ ¢ £ ¤ ¥ ¦ § ¨ © ª « ¬ ­ ® ¯
+° ± ² ³ ´ µ ¶ · ¸ ¹ º » ¼ ½ ¾ ¿
+À Á Â Ã Ä Å Æ Ç È É Ê Ë Ì Í Î Ï
+Ð Ñ Ò Ó Ô Õ Ö × Ø Ù Ú Û Ü Ý Þ ß
+à á â ã ä å æ ç è é ê ë ì í î ï
+ð ñ ò ó ô õ ö ÷ ø ù ú û ü ý þ ÿ
+</P></DD>
+
+</DL>
+
+<SMALL>Created by pngmeta V1.10</SMALL>
+
+</BODY>
+</HTML>
diff --git a/test4 b/test4
new file mode 100755
index 000000000..4c00f1463
--- /dev/null
+++ b/test4
@@ -0,0 +1,3 @@
+#!/bin/sh
+echo 'Testing RDF/XML output'
+./pngmeta -xrdf ct1n0g04.png | diff -c test4.xpt -
diff --git a/test4.xpt b/test4.xpt
new file mode 100644
index 000000000..c7a5977f7
--- /dev/null
+++ b/test4.xpt
@@ -0,0 +1,20 @@
+<rdf:RDF xmlns:rdf='http://www.w3.org/1999/02/22-rdf-syntax-ns#'
+         xmlns:s='http://www.tasi.ac.uk/rdf/vocab#'
+         xmlns:dc='http://purl.org/dc/elements/1.0/'>
+  <s:Image about="ct1n0g04.png">
+    <dc:type>image/png</dc:type>
+    <s:Title>PngSuite</s:Title>
+    <s:Author>Willem A.J. van Schaik
+(gwillem@ntuvax.ntu.ac.sg)</s:Author>
+    <s:Copyright>Copyright Willem van Schaik, Singapore 1995</s:Copyright>
+    <s:Description>A compilation of a set of images created to test the
+various color-types of the PNG format. Included are
+black&amp;white, color, paletted, with alpha channel, with
+transparency formats. All bit-depths allowed according
+to the spec are present.</s:Description>
+    <s:Software>Created on a NeXTstation color using "pnmtopng".</s:Software>
+    <s:Disclaimer>Freeware.</s:Disclaimer>
+  </s:Image>
+</rdf:RDF>
+
+<!--Created by pngmeta V1.10 -->