Fix the pkg-config file generation.

Update Xcode project to use installed PNG library.

.github/workflows/build.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
     - name: Checkout PDFio sources
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Update Build Environment
       run: sudo apt-get update --fix-missing -y
     - name: Install Prerequisites
@@ -21,7 +21,7 @@ jobs:
     - name: Configure PDFio
       run: ./configure --enable-debug --enable-sanitizer --enable-maintainer
     - name: Build PDFio
-      run: make "COMMONFLAGS=-g -fsanitize=address"
+      run: make
     - name: Test PDFio
       env:
         ASAN_OPTIONS: leak_check_at_exit=false
@@ -37,7 +37,7 @@ jobs:
 
     steps:
     - name: Checkout PDFio sources
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Configure PDFio
       run: ./configure --enable-debug --enable-sanitizer --enable-maintainer
     - name: Build PDFio
@@ -53,9 +53,9 @@ jobs:
 
     steps:
     - name: Checkout PDFio sources
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
     - name: Setup MSBuild
-      uses: microsoft/setup-msbuild@v1.0.2
+      uses: microsoft/setup-msbuild@v2
     - name: Nuget Restore
       run: nuget restore pdfio.sln
     - name: Build PDFio

.github/workflows/codeql.yml

@@ -24,7 +24,7 @@ jobs:
 
     steps:
       - name: Checkout PDFio sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           submodules: recursive
 

.github/workflows/coverity.yml

@@ -8,7 +8,7 @@ jobs:
     environment: Coverity
     steps:
       - name: Checkout PDFio sources
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Update Build Environment
         run: sudo apt-get update --fix-missing -y
       - name: Install Prerequisites

CHANGES.md

@@ -2,6 +2,19 @@ Changes in PDFio
 ================
 
 
+v1.6.1 - YYYY-MM-DD
+-------------------
+
+- Added missing input checking to `pdfioFileCreateFontObjFromBase` function.
+- Updated support for UTF-16 strings (Issue #141)
+- Updated Xcode project to use installed PNG library.
+- Fixed decryption of PDF files using an Encrypt dictionary instead of an
+  indirect reference (Issue #139)
+- Fixed character range checking in a TTF support function.
+- Fixed some clang warnings.
+- Fixed the generated pkg-config file.
+
+
 v1.6.0 - 2025-10-06
 -------------------
 

config.guess

@@ -1,10 +1,10 @@
 #! /bin/sh
 # Attempt to guess a canonical system name.
-#   Copyright 1992-2022 Free Software Foundation, Inc.
+#   Copyright 1992-2025 Free Software Foundation, Inc.
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2022-09-17'
+timestamp='2025-07-10'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -47,7 +47,7 @@ me=`echo "$0" | sed -e 's,.*/,,'`
 usage="\
 Usage: $0 [OPTION]
 
-Output the configuration name of the system \`$me' is run on.
+Output the configuration name of the system '$me' is run on.
 
 Options:
   -h, --help         print this help, then exit
@@ -60,13 +60,13 @@ version="\
 GNU config.guess ($timestamp)
 
 Originally written by Per Bothner.
-Copyright 1992-2022 Free Software Foundation, Inc.
+Copyright 1992-2025 Free Software Foundation, Inc.
 
 This is free software; see the source for copying conditions.  There is NO
 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
 
 help="
-Try \`$me --help' for more information."
+Try '$me --help' for more information."
 
 # Parse command line
 while test $# -gt 0 ; do
@@ -102,8 +102,8 @@ GUESS=
 # temporary files to be created and, as you can see below, it is a
 # headache to deal with in a portable fashion.
 
-# Historically, `CC_FOR_BUILD' used to be named `HOST_CC'. We still
-# use `HOST_CC' if defined, but it is deprecated.
+# Historically, 'CC_FOR_BUILD' used to be named 'HOST_CC'. We still
+# use 'HOST_CC' if defined, but it is deprecated.
 
 # Portable tmp directory creation inspired by the Autoconf team.
 
@@ -123,7 +123,7 @@ set_cc_for_build() {
     dummy=$tmp/dummy
     case ${CC_FOR_BUILD-},${HOST_CC-},${CC-} in
 	,,)    echo "int x;" > "$dummy.c"
-	       for driver in cc gcc c89 c99 ; do
+	       for driver in cc gcc c17 c99 c89 ; do
 		   if ($driver -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then
 		       CC_FOR_BUILD=$driver
 		       break
@@ -155,6 +155,9 @@ Linux|GNU|GNU/*)
 
 	set_cc_for_build
 	cat <<-EOF > "$dummy.c"
+	#if defined(__ANDROID__)
+	LIBC=android
+	#else
 	#include <features.h>
 	#if defined(__UCLIBC__)
 	LIBC=uclibc
@@ -162,6 +165,8 @@ Linux|GNU|GNU/*)
 	LIBC=dietlibc
 	#elif defined(__GLIBC__)
 	LIBC=gnu
+	#elif defined(__LLVM_LIBC__)
+	LIBC=llvm
 	#else
 	#include <stdarg.h>
 	/* First heuristic to detect musl libc.  */
@@ -169,6 +174,7 @@ Linux|GNU|GNU/*)
 	LIBC=musl
 	#endif
 	#endif
+	#endif
 	EOF
 	cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
 	eval "$cc_set_libc"
@@ -459,7 +465,7 @@ case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in
 		UNAME_RELEASE=`uname -v`
 		;;
 	esac
-	# Japanese Language versions have a version number like `4.1.3-JL'.
+	# Japanese Language versions have a version number like '4.1.3-JL'.
 	SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'`
 	GUESS=sparc-sun-sunos$SUN_REL
 	;;
@@ -628,7 +634,8 @@ EOF
 		sed 's/^		//' << EOF > "$dummy.c"
 		#include <sys/systemcfg.h>
 
-		main()
+		int
+		main ()
 			{
 			if (!__power_pc())
 				exit(1);
@@ -712,7 +719,8 @@ EOF
 		#include <stdlib.h>
 		#include <unistd.h>
 
-		int main ()
+		int
+		main ()
 		{
 		#if defined(_SC_KERNEL_BITS)
 		    long bits = sysconf(_SC_KERNEL_BITS);
@@ -904,7 +912,7 @@ EOF
 	fi
 	;;
     *:FreeBSD:*:*)
-	UNAME_PROCESSOR=`/usr/bin/uname -p`
+	UNAME_PROCESSOR=`uname -p`
 	case $UNAME_PROCESSOR in
 	    amd64)
 		UNAME_PROCESSOR=x86_64 ;;
@@ -976,7 +984,27 @@ EOF
 	GUESS=$UNAME_MACHINE-unknown-minix
 	;;
     aarch64:Linux:*:*)
-	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	set_cc_for_build
+	CPU=$UNAME_MACHINE
+	LIBCABI=$LIBC
+	if test "$CC_FOR_BUILD" != no_compiler_found; then
+	    ABI=64
+	    sed 's/^	    //' << EOF > "$dummy.c"
+	    #ifdef __ARM_EABI__
+	    #ifdef __ARM_PCS_VFP
+	    ABI=eabihf
+	    #else
+	    ABI=eabi
+	    #endif
+	    #endif
+EOF
+	    cc_set_abi=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^ABI' | sed 's, ,,g'`
+	    eval "$cc_set_abi"
+	    case $ABI in
+		eabi | eabihf) CPU=armv8l; LIBCABI=$LIBC$ABI ;;
+	    esac
+	fi
+	GUESS=$CPU-unknown-linux-$LIBCABI
 	;;
     aarch64_be:Linux:*:*)
 	UNAME_MACHINE=aarch64_be
@@ -1042,6 +1070,15 @@ EOF
     k1om:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
+    kvx:Linux:*:*)
+	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	;;
+    kvx:cos:*:*)
+	GUESS=$UNAME_MACHINE-unknown-cos
+	;;
+    kvx:mbr:*:*)
+	GUESS=$UNAME_MACHINE-unknown-mbr
+	;;
     loongarch32:Linux:*:* | loongarch64:Linux:*:*)
 	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
 	;;
@@ -1197,7 +1234,7 @@ EOF
 	GUESS=$UNAME_MACHINE-pc-sysv4.2uw$UNAME_VERSION
 	;;
     i*86:OS/2:*:*)
-	# If we were able to find `uname', then EMX Unix compatibility
+	# If we were able to find 'uname', then EMX Unix compatibility
 	# is probably installed.
 	GUESS=$UNAME_MACHINE-pc-os2-emx
 	;;
@@ -1338,7 +1375,7 @@ EOF
 		GUESS=ns32k-sni-sysv
 	fi
 	;;
-    PENTIUM:*:4.0*:*)	# Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+    PENTIUM:*:4.0*:*)	# Unisys 'ClearPath HMP IX 4000' SVR4/MP effort
 			# says <Richard.M.Bartel@ccMail.Census.GOV>
 	GUESS=i586-unisys-sysv4
 	;;
@@ -1560,6 +1597,12 @@ EOF
     *:Unleashed:*:*)
 	GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE
 	;;
+    x86_64:[Ii]ronclad:*:*|i?86:[Ii]ronclad:*:*)
+	GUESS=$UNAME_MACHINE-pc-ironclad-mlibc
+	;;
+    *:[Ii]ronclad:*:*)
+	GUESS=$UNAME_MACHINE-unknown-ironclad-mlibc
+	;;
 esac
 
 # Do we have a guess based on uname results?
@@ -1583,6 +1626,7 @@ cat > "$dummy.c" <<EOF
 #endif
 #endif
 #endif
+int
 main ()
 {
 #if defined (sony)
@@ -1767,8 +1811,8 @@ fi
 exit 1
 
 # Local variables:
-# eval: (add-hook 'before-save-hook 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp nil t)
 # time-stamp-start: "timestamp='"
-# time-stamp-format: "%:y-%02m-%02d"
+# time-stamp-format: "%Y-%02m-%02d"
 # time-stamp-end: "'"
 # End:

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for pdfio 1.6.0.
+# Generated by GNU Autoconf 2.71 for pdfio 1.6.1.
 #
 # Report bugs to <https://github.com/michaelrsweet/pdfio/issues>.
 #
@@ -610,8 +610,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='pdfio'
 PACKAGE_TARNAME='pdfio'
-PACKAGE_VERSION='1.6.0'
-PACKAGE_STRING='pdfio 1.6.0'
+PACKAGE_VERSION='1.6.1'
+PACKAGE_STRING='pdfio 1.6.1'
 PACKAGE_BUGREPORT='https://github.com/michaelrsweet/pdfio/issues'
 PACKAGE_URL='https://www.msweet.org/pdfio'
 
@@ -653,7 +653,7 @@ WARNINGS
 CSFLAGS
 LIBPDFIO_STATIC
 LIBPDFIO
-PKGCONFIG_LIBPNG
+PKGCONFIG_REQUIRES_PRIVATE
 PKGCONFIG_REQUIRES
 PKGCONFIG_LIBS_PRIVATE
 PKGCONFIG_LIBS
@@ -1295,7 +1295,7 @@ if test "$ac_init_help" = "long"; then
   # 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 <<_ACEOF
-\`configure' configures pdfio 1.6.0 to adapt to many kinds of systems.
+\`configure' configures pdfio 1.6.1 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1361,7 +1361,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of pdfio 1.6.0:";;
+     short | recursive ) echo "Configuration of pdfio 1.6.1:";;
    esac
   cat <<\_ACEOF
 
@@ -1460,7 +1460,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-pdfio configure 1.6.0
+pdfio configure 1.6.1
 generated by GNU Autoconf 2.71
 
 Copyright (C) 2021 Free Software Foundation, Inc.
@@ -1678,7 +1678,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by pdfio $as_me 1.6.0, which was
+It was created by pdfio $as_me 1.6.1, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   $ $0$ac_configure_args_raw
@@ -2434,9 +2434,9 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
-PDFIO_VERSION="1.6.0"
-PDFIO_VERSION_MAJOR="`echo 1.6.0 | awk -F. '{print $1}'`"
-PDFIO_VERSION_MINOR="`echo 1.6.0 | awk -F. '{printf("%d\n",$2);}'`"
+PDFIO_VERSION="1.6.1"
+PDFIO_VERSION_MAJOR="`echo 1.6.1 | awk -F. '{print $1}'`"
+PDFIO_VERSION_MINOR="`echo 1.6.1 | awk -F. '{printf("%d\n",$2);}'`"
 
 
 
@@ -4138,7 +4138,9 @@ fi
 PKGCONFIG_CFLAGS="-I\${includedir}"
 PKGCONFIG_LIBS="-L\${libdir} -lpdfio"
 PKGCONFIG_LIBS_PRIVATE="-lm"
-PKGCONFIG_REQUIRES="zlib"
+PKBCONFIG_REQUIRES=""
+PKGCONFIG_REQUIRES_PRIVATE=""
+
 
 
 
@@ -4154,6 +4156,7 @@ then :
 printf "%s\n" "yes" >&6; }
     CPPFLAGS="$($PKGCONFIG --cflags zlib) $CPPFLAGS"
     LIBS="$($PKGCONFIG --libs zlib) $LIBS"
+    PKGCONFIG_REQUIRES_PRIVATE="zlib"
 
 else $as_nop
 
@@ -4216,7 +4219,6 @@ then :
 
 fi
 
-    PKGCONFIG_REQUIRES=""
     PKGCONFIG_LIBS_PRIVATE="-lz $PKGCONFIG_LIBS_PRIVATE"
 
 fi
@@ -4228,9 +4230,6 @@ then :
 fi
 
 
-PKGCONFIG_LIBPNG=""
-
-
 if test "x$PKGCONFIG" != x -a x$enable_libpng != xno
 then :
 
@@ -4246,8 +4245,16 @@ printf "%s\n" "#define HAVE_LIBPNG 1" >>confdefs.h
 
 	CPPFLAGS="$($PKGCONFIG --cflags libpng16) -DHAVE_LIBPNG=1 $CPPFLAGS"
 	LIBS="$($PKGCONFIG --libs libpng16) -lz $LIBS"
-	PKGCONFIG_LIBS_PRIVATE="$($PKGCONFIG --libs libpng16) $PKGCONFIG_LIBS_PRIVATE"
-	PKGCONFIG_REQUIRES="libpng >= 1.6,$PKGCONFIG_REQUIRES"
+	if test "x$PKGCONFIG_REQUIRES_PRIVATE" = x
+then :
+
+	    PKGCONFIG_REQUIRES_PRIVATE="libpng >= 1.6"
+
+else $as_nop
+
+	    PKGCONFIG_REQUIRES_PRIVATE="libpng >= 1.6, $PKGCONFIG_REQUIRES_PRIVATE"
+
+fi
 
 else $as_nop
 
@@ -4314,6 +4321,8 @@ else $as_nop
     LIBPDFIO_STATIC=""
     PKGCONFIG_LIBS="$PKGCONFIG_LIBS $PKGCONFIG_LIBS_PRIVATE"
     PKGCONFIG_LIBS_PRIVATE=""
+    PKGCONFIG_REQUIRES="$PKGCONFIG_REQUIRES_PRIVATE"
+    PKGCONFIG_REQUIRES_PRIVATE=""
 
 fi
 
@@ -5106,7 +5115,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by pdfio $as_me 1.6.0, which was
+This file was extended by pdfio $as_me 1.6.1, which was
 generated by GNU Autoconf 2.71.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -5162,7 +5171,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-pdfio config.status 1.6.0
+pdfio config.status 1.6.1
 configured by $0, generated by GNU Autoconf 2.71,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -21,7 +21,7 @@ AC_PREREQ([2.70])
 
 
 dnl Package name and version...
-AC_INIT([pdfio], [1.6.0], [https://github.com/michaelrsweet/pdfio/issues], [pdfio], [https://www.msweet.org/pdfio])
+AC_INIT([pdfio], [1.6.1], [https://github.com/michaelrsweet/pdfio/issues], [pdfio], [https://www.msweet.org/pdfio])
 
 PDFIO_VERSION="AC_PACKAGE_VERSION"
 PDFIO_VERSION_MAJOR="`echo AC_PACKAGE_VERSION | awk -F. '{print $1}'`"
@@ -119,11 +119,13 @@ AC_PATH_TOOL([PKGCONFIG], [pkg-config])
 PKGCONFIG_CFLAGS="-I\${includedir}"
 PKGCONFIG_LIBS="-L\${libdir} -lpdfio"
 PKGCONFIG_LIBS_PRIVATE="-lm"
-PKGCONFIG_REQUIRES="zlib"
+PKBCONFIG_REQUIRES=""
+PKGCONFIG_REQUIRES_PRIVATE=""
 AC_SUBST([PKGCONFIG_CFLAGS])
 AC_SUBST([PKGCONFIG_LIBS])
 AC_SUBST([PKGCONFIG_LIBS_PRIVATE])
 AC_SUBST([PKGCONFIG_REQUIRES])
+AC_SUBST([PKGCONFIG_REQUIRES_PRIVATE])
 
 
 dnl ZLIB
@@ -132,6 +134,7 @@ AS_IF([$PKGCONFIG --exists zlib], [
     AC_MSG_RESULT([yes])
     CPPFLAGS="$($PKGCONFIG --cflags zlib) $CPPFLAGS"
     LIBS="$($PKGCONFIG --libs zlib) $LIBS"
+    PKGCONFIG_REQUIRES_PRIVATE="zlib"
 ],[
     AC_MSG_RESULT([no])
     AC_CHECK_HEADER([zlib.h])
@@ -141,16 +144,12 @@ AS_IF([$PKGCONFIG --exists zlib], [
 	AC_MSG_ERROR([Sorry, this software requires zlib 1.1 or higher.])
     ])
 
-    PKGCONFIG_REQUIRES=""
     PKGCONFIG_LIBS_PRIVATE="-lz $PKGCONFIG_LIBS_PRIVATE"
 ])
 
 dnl libpng...
 AC_ARG_ENABLE([libpng], AS_HELP_STRING([--enable-libpng], [use libpng for pdfioFileCreateImageObjFromFile, default=auto]))
 
-PKGCONFIG_LIBPNG=""
-AC_SUBST([PKGCONFIG_LIBPNG])
-
 AS_IF([test "x$PKGCONFIG" != x -a x$enable_libpng != xno], [
     AC_MSG_CHECKING([for libpng-1.6.x])
     AS_IF([$PKGCONFIG --exists libpng16], [
@@ -158,8 +157,11 @@ AS_IF([test "x$PKGCONFIG" != x -a x$enable_libpng != xno], [
 	AC_DEFINE([HAVE_LIBPNG], 1, [Have PNG library?])
 	CPPFLAGS="$($PKGCONFIG --cflags libpng16) -DHAVE_LIBPNG=1 $CPPFLAGS"
 	LIBS="$($PKGCONFIG --libs libpng16) -lz $LIBS"
-	PKGCONFIG_LIBS_PRIVATE="$($PKGCONFIG --libs libpng16) $PKGCONFIG_LIBS_PRIVATE"
-	PKGCONFIG_REQUIRES="libpng >= 1.6,$PKGCONFIG_REQUIRES"
+	AS_IF([test "x$PKGCONFIG_REQUIRES_PRIVATE" = x], [
+	    PKGCONFIG_REQUIRES_PRIVATE="libpng >= 1.6"
+	], [
+	    PKGCONFIG_REQUIRES_PRIVATE="libpng >= 1.6, $PKGCONFIG_REQUIRES_PRIVATE"
+	])
     ], [
 	AC_MSG_RESULT([no]);
 	AS_IF([test x$enable_libpng = xyes], [
@@ -192,6 +194,8 @@ AS_IF([test x$enable_shared = xyes], [
     LIBPDFIO_STATIC=""
     PKGCONFIG_LIBS="$PKGCONFIG_LIBS $PKGCONFIG_LIBS_PRIVATE"
     PKGCONFIG_LIBS_PRIVATE=""
+    PKGCONFIG_REQUIRES="$PKGCONFIG_REQUIRES_PRIVATE"
+    PKGCONFIG_REQUIRES_PRIVATE=""
 ])
 
 AC_SUBST([LIBPDFIO])

examples/mmd.c

@@ -3,7 +3,7 @@
 //
 //     https://www.msweet.org/mmd
 //
-// Copyright © 2017-2024 by Michael R Sweet.
+// Copyright © 2017-2025 by Michael R Sweet.
 //
 // Licensed under Apache License v2.0.	See the file "LICENSE" for more
 // information.
@@ -166,7 +166,7 @@ mmdCopyAllText(mmd_t *node)		// I - Parent node
   char		*all = NULL,		// String buffer
 		*allptr = NULL,		// Pointer into string buffer
 		*temp;			// Temporary pointer
-  size_t	allsize = 1,		// Size of "all" buffer
+  size_t	allsize = 0,		// Size of "all" buffer
 		textlen;		// Length of "text" string
   mmd_t		*current,		// Current node
 		*next;			// Next node
@@ -179,6 +179,8 @@ mmdCopyAllText(mmd_t *node)		// I - Parent node
     if (current->text)
     {
       // Append this node's text to the string...
+      long alloff = allptr - all;	// Offset within current buffer
+
       textlen = strlen(current->text);
       allsize += textlen + (size_t)current->whitespace;
       temp    = realloc(all, allsize);
@@ -189,8 +191,8 @@ mmdCopyAllText(mmd_t *node)		// I - Parent node
 	return (NULL);
       }
 
-      allptr = temp + (allptr - all);
       all    = temp;
+      allptr = all + alloff;
 
       if (current->whitespace)
 	*allptr++ = ' ';
@@ -1059,6 +1061,8 @@ mmdLoadIO(mmd_t      *root,		// I - Root node for document or `NULL` for a new d
 	break;
       else if (line[0] == '>' && *ptr == '>')
 	memmove(ptr, ptr + 1, strlen(ptr));
+
+      DEBUG2_printf("        line=\"%s\"\n", line);
     }
 
     mmd_parse_inline(&doc, block, lineptr);
@@ -1493,7 +1497,7 @@ mmd_parse_inline(_mmd_doc_t *doc,	// I - Document
 
   for (text = NULL, type = MMD_TYPE_NORMAL_TEXT; *lineptr; lineptr ++)
   {
-    DEBUG2_printf("mmd_parse_inline: lineptr=%p(\"%32.32s...\"), type=%d, text=%p, whitespace=%d\n", lineptr, lineptr, type, text, whitespace);
+    DEBUG2_printf("mmd_parse_inline: lineptr=%p(\"%s\"), type=%d, text=%p, whitespace=%d\n", lineptr, lineptr, type, text, whitespace);
 
     if (isspace(*lineptr & 255) && type != MMD_TYPE_CODE_TEXT)
     {
@@ -2090,6 +2094,8 @@ mmd_read_buffer(_mmd_filebuf_t *file)	// I - File buffer
   if (file->bufptr && file->bufptr > file->buffer)
   {
     // Discard previous characters in the buffer.
+    DEBUG2_printf("mmd_read_buffer: before buffer=\"%s\"\n", file->bufptr);
+
     memmove(file->buffer, file->bufptr, file->bufend - file->bufptr);
     file->bufend -= (file->bufptr - file->buffer);
   }
@@ -2099,11 +2105,13 @@ mmd_read_buffer(_mmd_filebuf_t *file)	// I - File buffer
     file->bufend = file->buffer;
   }
 
-  if ((bytes = (file->cb)(file->cbdata, file->bufend, sizeof(file->buffer) - (size_t)(file->bufend - file->buffer - 1))) > 0)
+  if ((bytes = (file->cb)(file->cbdata, file->bufend, sizeof(file->buffer) - (size_t)(file->bufend - file->buffer) - 1)) > 0)
     file->bufend += bytes;
 
   *(file->bufend) = '\0';
   file->bufptr    = file->buffer;
+
+  DEBUG2_printf("mmd_read_buffer: after buffer=\"%s\"\n", file->buffer);
 }
 
 
@@ -2161,6 +2169,8 @@ mmd_read_line(_mmd_filebuf_t *file,	// I - File buffer
   else if (!strchr(file->bufptr, '\n'))
     mmd_read_buffer(file);
 
+  DEBUG2_printf("mmd_read_line: Returning \"%s\"\n", line);
+
   return (line);
 }
 

pdfio-content.c

@@ -1712,12 +1712,23 @@ pdfioFileCreateFontObjFromBase(
   pdfio_obj_t	*obj;			// Font object
 
 
-  if (pdf && pdf->profile >= _PDFIO_PROFILE_PDFA_1A && pdf->profile <= _PDFIO_PROFILE_PDFA_4)
+  // Range check input...
+  if (!pdf)
+    return (NULL);
+
+  if (!name)
+  {
+    _pdfioFileError(pdf, "No base font name specified.");
+    return (NULL);
+  }
+
+  if (pdf->profile >= _PDFIO_PROFILE_PDFA_1A && pdf->profile <= _PDFIO_PROFILE_PDFA_4)
   {
     _pdfioFileError(pdf, "Base fonts are not allowed in PDF/A files; use pdfioFileCreateFontObjFromFile to embed a font.");
     return (NULL);
   }
 
+  // Create a base font object...
   if ((dict = pdfioDictCreate(pdf)) == NULL)
     return (NULL);
 
@@ -2691,7 +2702,8 @@ copy_png(pdfio_dict_t *dict,		// I - Dictionary
   png_infop	info = NULL;		// PNG info pointers
   png_bytep	*rows = NULL;		// PNG row pointers
   unsigned char	*pixels = NULL;		// PNG image data
-  unsigned	i,			// Looping var
+  int		i;			// Looping var
+  unsigned	y,			// Row
 		color_type,		// PNG color mode
 		width,			// Width in columns
 		height,			// Height in lines
@@ -2789,8 +2801,8 @@ copy_png(pdfio_dict_t *dict,		// I - Dictionary
     goto finish_png;
   }
 
-  for (i = 0; i < height; i ++)
-    rows[i] = pixels + i * linesize;
+  for (y = 0; y < height; y ++)
+    rows[y] = pixels + y * linesize;
 
   // Read the image...
   for (i = png_set_interlace_handling(pp); i > 0; i --)
@@ -2804,7 +2816,7 @@ copy_png(pdfio_dict_t *dict,		// I - Dictionary
   // Grab any color space/palette information...
   if (png_get_PLTE(pp, info, &palette, &num_palette))
   {
-    pdfioDictSetArray(dict, "ColorSpace", pdfioArrayCreateColorFromPalette(dict->pdf, num_palette, (unsigned char *)palette));
+    pdfioDictSetArray(dict, "ColorSpace", pdfioArrayCreateColorFromPalette(dict->pdf, (size_t)num_palette, (unsigned char *)palette));
   }
   else if (png_get_iCCP(pp, info, &icc_name, /*compression_type*/NULL, &icc_data, &icc_datalen))
   {
@@ -3834,14 +3846,12 @@ png_read_func(png_structp pp,		// I - PNG pointer
               png_bytep   data,		// I - Read buffer
               size_t      length)	// I - Number of bytes to read
 {
-  int		*fd = (int *)png_get_io_ptr(pp);
-					// Pointer to file descriptor
-  ssize_t	bytes;			// Bytes read
+  int	*fd = (int *)png_get_io_ptr(pp);// Pointer to file descriptor
 
 
   PDFIO_DEBUG("png_read_func(pp=%p, data=%p, length=%lu)\n", (void *)pp, (void *)data, (unsigned long)length);
 
-  if ((bytes = read(*fd, data, length)) < (ssize_t)length)
+  if (read(*fd, data, length) < (ssize_t)length)
     png_error(pp, "Unable to read from PNG file.");
 }
 #endif // HAVE_LIBPNG

pdfio-crypto.c

@@ -214,6 +214,7 @@ _pdfioCryptoLock(
 
   pdfioObjClose(pdf->encrypt_obj);
 
+  pdf->encrypt_dict = dict;
   pdf->encryption   = encryption;
   pdf->permissions  = permissions;
 
@@ -570,7 +571,6 @@ _pdfioCryptoUnlock(
 {
   int		tries;			// Number of tries
   const char	*password = NULL;	// Password to try
-  pdfio_dict_t	*encrypt_dict;		// Encrypt objection dictionary
   int		version,		// Version value
 		revision,		// Revision value
 		length;			// Key length value
@@ -590,20 +590,14 @@ _pdfioCryptoUnlock(
   _pdfio_value_t *value;		// Encrypt dictionary value, if any
 
 
-  // See if we support the type of encryption specified by the Encrypt object
+  // See if we support the type of encryption specified by the Encrypt
   // dictionary...
-  if ((encrypt_dict = pdfioObjGetDict(pdf->encrypt_obj)) == NULL)
-  {
-    _pdfioFileError(pdf, "Unable to get encryption dictionary.");
-    return (false);
-  }
+  handler  = pdfioDictGetName(pdf->encrypt_dict, "Filter");
+  version  = (int)pdfioDictGetNumber(pdf->encrypt_dict, "V");
+  revision = (int)pdfioDictGetNumber(pdf->encrypt_dict, "R");
+  length   = (int)pdfioDictGetNumber(pdf->encrypt_dict, "Length");
 
-  handler  = pdfioDictGetName(encrypt_dict, "Filter");
-  version  = (int)pdfioDictGetNumber(encrypt_dict, "V");
-  revision = (int)pdfioDictGetNumber(encrypt_dict, "R");
-  length   = (int)pdfioDictGetNumber(encrypt_dict, "Length");
-
-  if ((value = _pdfioDictGetValue(encrypt_dict, "EncryptMetadata")) != NULL && value->type == PDFIO_VALTYPE_BOOLEAN)
+  if ((value = _pdfioDictGetValue(pdf->encrypt_dict, "EncryptMetadata")) != NULL && value->type == PDFIO_VALTYPE_BOOLEAN)
     pdf->encrypt_metadata = value->value.boolean;
   else
     pdf->encrypt_metadata = true;
@@ -622,9 +616,9 @@ _pdfioCryptoUnlock(
     pdfio_dict_t *filter;		// Crypt Filter
     const char	*cfm;			// Crypt filter method
 
-    stream_filter = pdfioDictGetName(encrypt_dict, "StmF");
-    string_filter = pdfioDictGetName(encrypt_dict, "StrF");
-    cf_dict       = pdfioDictGetDict(encrypt_dict, "CF");
+    stream_filter = pdfioDictGetName(pdf->encrypt_dict, "StmF");
+    string_filter = pdfioDictGetName(pdf->encrypt_dict, "StrF");
+    cf_dict       = pdfioDictGetDict(pdf->encrypt_dict, "CF");
 
     if (!cf_dict)
     {
@@ -701,7 +695,7 @@ _pdfioCryptoUnlock(
   // Grab the remaining values we need to unlock the PDF...
   pdf->file_keylen = (size_t)(length / 8);
 
-  p = pdfioDictGetNumber(encrypt_dict, "P");
+  p = pdfioDictGetNumber(pdf->encrypt_dict, "P");
   PDFIO_DEBUG("_pdfioCryptoUnlock: P=%.0f\n", p);
   if (p < 0x7fffffff)			// Handle integers > 2^31-1
     pdf->permissions = (pdfio_permission_t)p;
@@ -709,8 +703,8 @@ _pdfioCryptoUnlock(
     pdf->permissions = (pdfio_permission_t)(p - 4294967296.0);
   PDFIO_DEBUG("_pdfioCryptoUnlock: permissions=%d\n", pdf->permissions);
 
-  owner_key = pdfioDictGetBinary(encrypt_dict, "O", &owner_keylen);
-  user_key  = pdfioDictGetBinary(encrypt_dict, "U", &user_keylen);
+  owner_key = pdfioDictGetBinary(pdf->encrypt_dict, "O", &owner_keylen);
+  user_key  = pdfioDictGetBinary(pdf->encrypt_dict, "U", &user_keylen);
 
   if (!owner_key)
   {

pdfio-dict.c

@@ -464,8 +464,12 @@ pdfioDictGetString(pdfio_dict_t *dict,	// I - Dictionary
   _pdfio_value_t *value = _pdfioDictGetValue(dict, key);
 
 
+  PDFIO_DEBUG("pdfioDictGetString(dict=%p, key=\"%s\")\n", (void *)dict, key);
+  PDFIO_DEBUG("pdfioDictGetString: value=%p(type=%d)\n", (void *)value, value ? value->type : 0);
+
   if (value && value->type == PDFIO_VALTYPE_STRING)
   {
+    PDFIO_DEBUG("pdfioDictGetString: Returning \"%s\".\n", value->value.string);
     return (value->value.string);
   }
   else if (value && value->type == PDFIO_VALTYPE_BINARY && value->value.binary.datalen < 4096)
@@ -476,6 +480,8 @@ pdfioDictGetString(pdfio_dict_t *dict,	// I - Dictionary
     if (!(value->value.binary.datalen & 1) && (!memcmp(value->value.binary.data, "\376\377", 2) || !memcmp(value->value.binary.data, "\377\376", 2)))
     {
       // Copy UTF-16...
+      PDFIO_DEBUG("pdfioDictGetString: Converting UTF-16 to UTF-8 string.\n");
+
       _pdfio_utf16cpy(temp, value->value.binary.data, value->value.binary.datalen, sizeof(temp));
     }
     else
@@ -489,10 +495,13 @@ pdfioDictGetString(pdfio_dict_t *dict,	// I - Dictionary
     value->type         = PDFIO_VALTYPE_STRING;
     value->value.string = pdfioStringCreate(dict->pdf, temp);
 
+    PDFIO_DEBUG("pdfioDictGetString: Returning \"%s\".\n", value->value.string);
+
     return (value->value.string);
   }
   else
   {
+    PDFIO_DEBUG("pdfioDictGetString: Returning NULL.\n");
     return (NULL);
   }
 }

pdfio-file.c

@@ -2283,12 +2283,18 @@ load_xref(
       {
 	// Save the trailer dictionary and grab the root (catalog) and info
 	// objects...
+	pdfio_obj_t	*encrypt_obj;	// Encryption object
+
 	pdf->trailer_dict = trailer.value.dict;
-	pdf->encrypt_obj  = pdfioDictGetObj(pdf->trailer_dict, "Encrypt");
 	pdf->id_array     = pdfioDictGetArray(pdf->trailer_dict, "ID");
 
+	if ((encrypt_obj = pdfioDictGetObj(pdf->trailer_dict, "Encrypt")) != NULL)
+	  pdf->encrypt_dict = pdfioObjGetDict(encrypt_obj);
+	else
+	  pdf->encrypt_dict = pdfioDictGetDict(pdf->trailer_dict, "Encrypt");
+
 	// If the trailer contains an Encrypt key, try unlocking the file...
-	if (pdf->encrypt_obj && !_pdfioCryptoUnlock(pdf, password_cb, password_data))
+	if (pdf->encrypt_dict && !_pdfioCryptoUnlock(pdf, password_cb, password_data))
 	  return (false);
       }
 
@@ -2434,12 +2440,18 @@ load_xref(
       {
 	// Save the trailer dictionary and grab the root (catalog) and info
 	// objects...
+	pdfio_obj_t	*encrypt_obj;	// Encryption object
+
 	pdf->trailer_dict = trailer.value.dict;
-	pdf->encrypt_obj  = pdfioDictGetObj(pdf->trailer_dict, "Encrypt");
 	pdf->id_array     = pdfioDictGetArray(pdf->trailer_dict, "ID");
 
+	if ((encrypt_obj  = pdfioDictGetObj(pdf->trailer_dict, "Encrypt")) != NULL)
+	  pdf->encrypt_dict = pdfioObjGetDict(encrypt_obj);
+	else
+	  pdf->encrypt_dict = pdfioDictGetDict(pdf->trailer_dict, "Encrypt");
+
 	// If the trailer contains an Encrypt key, try unlocking the file...
-	if (pdf->encrypt_obj && !_pdfioCryptoUnlock(pdf, password_cb, password_data))
+	if (pdf->encrypt_dict && !_pdfioCryptoUnlock(pdf, password_cb, password_data))
 	  return (false);
       }
     }
@@ -2529,7 +2541,7 @@ repair_xref(
   pdf->root_obj     = NULL;
   pdf->info_obj     = NULL;
   pdf->pages_obj    = NULL;
-  pdf->encrypt_obj  = NULL;
+  pdf->encrypt_dict = NULL;
 
   // Read from the beginning of the file, looking for objects...
   if ((line_offset = _pdfioFileSeek(pdf, 0, SEEK_SET)) < 0)
@@ -2603,10 +2615,17 @@ repair_xref(
 	      if (!strcmp(type, "XRef") && !pdf->trailer_dict)
 	      {
 		// Save the trailer dictionary...
+		pdfio_obj_t *encrypt_obj;
+					// Encryption object
+
 	        PDFIO_DEBUG("repair_xref: XRef stream...\n");
 		pdf->trailer_dict = pdfioObjGetDict(obj);
-		pdf->encrypt_obj  = pdfioDictGetObj(pdf->trailer_dict, "Encrypt");
 		pdf->id_array     = pdfioDictGetArray(pdf->trailer_dict, "ID");
+
+		if ((encrypt_obj = pdfioDictGetObj(pdf->trailer_dict, "Encrypt")) != NULL)
+		  pdf->encrypt_dict = pdfioObjGetDict(encrypt_obj);
+		else
+		  pdf->encrypt_dict = pdfioDictGetDict(pdf->trailer_dict, "Encrypt");
 	      }
 	    }
 	    else if (type && !strcmp(line, "endobj"))
@@ -2660,11 +2679,17 @@ repair_xref(
       {
 	// Save the trailer dictionary and grab the root (catalog) and info
 	// objects...
+	pdfio_obj_t	*encrypt_obj;	// Encryption object
+
 	PDFIO_DEBUG("repair_xref: Using this trailer dictionary.\n");
 
 	pdf->trailer_dict = trailer.value.dict;
-	pdf->encrypt_obj  = pdfioDictGetObj(pdf->trailer_dict, "Encrypt");
 	pdf->id_array     = pdfioDictGetArray(pdf->trailer_dict, "ID");
+
+	if ((encrypt_obj = pdfioDictGetObj(pdf->trailer_dict, "Encrypt")) != NULL)
+	  pdf->encrypt_dict = pdfioObjGetDict(encrypt_obj);
+	else
+	  pdf->encrypt_dict = pdfioDictGetDict(pdf->trailer_dict, "Encrypt");
       }
     }
 
@@ -2678,7 +2703,7 @@ repair_xref(
     pdf->trailer_dict = backup_trailer;
 
   // If the trailer contains an Encrypt key, try unlocking the file...
-  if (pdf->encrypt_obj && !_pdfioCryptoUnlock(pdf, password_cb, password_data))
+  if (pdf->encrypt_dict && !_pdfioCryptoUnlock(pdf, password_cb, password_data))
     return (false);
 
   // Load any stream objects...

pdfio-private.h

@@ -283,7 +283,8 @@ struct _pdfio_file_s			// PDF file structure
   pdfio_obj_t	*root_obj;		// Root object/dictionary
   pdfio_obj_t	*info_obj;		// Information object
   pdfio_obj_t	*pages_obj;		// Root pages object
-  pdfio_obj_t	*encrypt_obj;		// De/Encryption object/dictionary
+  pdfio_obj_t	*encrypt_obj;		// Encryption object (not used for reading)
+  pdfio_dict_t	*encrypt_dict;		// De/Encryption dictionary
   pdfio_obj_t	*cgats001_obj,		// CGATS001 ICC profile object
 		*cp1252_obj,		// CP1252 font encoding object
 		*unicode_obj;		// Unicode font encoding object

pdfio-token.c

@@ -393,9 +393,18 @@ _pdfioTokenRead(_pdfio_token_t *tb,	// I - Token buffer/stack
 	  return (false);
 	}
 
-	if (saw_nul)
+        if ((bufptr - buffer) > 3 && ((bufptr - buffer) & 1) != 0 && (!memcmp(buffer, "(\377\376", 3) || !memcmp(buffer, "(\376\377", 3)))
         {
-	  // Convert to a hex (binary) string...
+          // UTF-16 string, convert to UTF-8...
+          PDFIO_DEBUG("_pdfioTokenRead: Converting string to UTF-8.\n", stderr);
+          _pdfio_utf16cpy(buffer + 1, (unsigned char *)buffer + 1, bufptr - buffer  - 1, bufsize - 1);
+
+          PDFIO_DEBUG("_pdfioTokenRead: Read '%s'.\n", buffer);
+          return (true);
+        }
+	else if (saw_nul)
+	{
+	  // Contains nul characters, convert to a hex (binary) string...
 	  char	*litptr,		// Pointer to literal character
 		*hexptr;		// Pointer to hex character
 	  size_t bytes = (size_t)(bufptr - buffer - 1);

pdfio.h

@@ -23,7 +23,7 @@ extern "C" {
 // Version numbers...
 //
 
-#  define PDFIO_VERSION		"1.6.0"
+#  define PDFIO_VERSION		"1.6.1"
 #  define PDFIO_VERSION_MAJOR	1
 #  define PDFIO_VERSION_MINOR	6
 

pdfio.pc.in

@@ -11,3 +11,4 @@ Cflags: @PKGCONFIG_CFLAGS@
 Libs: @PKGCONFIG_LIBS@
 Libs.private: @PKGCONFIG_LIBS_PRIVATE@
 Requires: @PKGCONFIG_REQUIRES@
+Requires.private: @PKGCONFIG_REQUIRES_PRIVATE@

pdfio.xcodeproj/project.pbxproj

@@ -379,7 +379,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 1.1.2;
+				CURRENT_PROJECT_VERSION = 1.6.1;
 				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = dwarf;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -390,6 +390,9 @@
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"$(inherited)",
 					"DEBUG=1",
+					"HAVE_LIBPNG=1",
+					"HAVE_TM_GMTOFF=1",
+					"HAVE_TIMEGM=1",
 				);
 				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
 				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
@@ -409,10 +412,21 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				HEADER_SEARCH_PATHS = (
+					/usr/local/include,
+					/opt/local/include,
+					/opt/homebrew/include,
+				);
 				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				ONLY_ACTIVE_ARCH = YES;
+				OTHER_LDFLAGS = (
+					"-L/usr/local/lib",
+					"-L/opt/local/lib",
+					"-L/opt/homebrew/lib",
+					"-lpng16",
+				);
 				RUN_CLANG_STATIC_ANALYZER = YES;
 				SDKROOT = macosx;
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;
@@ -465,7 +479,7 @@
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 1.1.2;
+				CURRENT_PROJECT_VERSION = 1.6.1;
 				DEAD_CODE_STRIPPING = YES;
 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
 				ENABLE_HARDENED_RUNTIME = YES;
@@ -474,7 +488,12 @@
 				ENABLE_USER_SCRIPT_SANDBOXING = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu11;
 				GCC_NO_COMMON_BLOCKS = YES;
-				GCC_PREPROCESSOR_DEFINITIONS = "$(inherited)";
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"$(inherited)",
+					"HAVE_LIBPNG=1",
+					"HAVE_TM_GMTOFF=1",
+					"HAVE_TIMEGM=1",
+				);
 				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
 				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
@@ -492,9 +511,20 @@
 				GCC_WARN_UNUSED_LABEL = YES;
 				GCC_WARN_UNUSED_PARAMETER = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
+				HEADER_SEARCH_PATHS = (
+					/usr/local/include,
+					/opt/local/include,
+					/opt/homebrew/include,
+				);
 				MACOSX_DEPLOYMENT_TARGET = 11.0;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				MTL_FAST_MATH = YES;
+				OTHER_LDFLAGS = (
+					"-L/usr/local/lib",
+					"-L/opt/local/lib",
+					"-L/opt/homebrew/lib",
+					"-lpng16",
+				);
 				RUN_CLANG_STATIC_ANALYZER = YES;
 				SDKROOT = macosx;
 				STRING_CATALOG_GENERATE_SYMBOLS = YES;

pdfio_native.nuspec

@@ -3,7 +3,7 @@
     <metadata>
         <id>pdfio_native</id>
         <title>PDFio Library for VS2019+</title>
-        <version>1.6.0</version>
+        <version>1.6.1</version>
         <authors>Michael R Sweet</authors>
         <owners>michaelrsweet</owners>
         <projectUrl>https://github.com/michaelrsweet/pappl</projectUrl>
@@ -16,7 +16,7 @@
         <copyright>Copyright © 2019-2025 by Michael R Sweet</copyright>
         <tags>pdf file native</tags>
 	<dependencies>
-	    <dependency id="pdfio_native.redist" version="1.6.0" />
+	    <dependency id="pdfio_native.redist" version="1.6.1" />
 	    <dependency id="libpng_native.redist" version="1.6.30" />
 	    <dependency id="zlib_native.redist" version="1.2.11" />
 	</dependencies>

pdfio_native.redist.nuspec

@@ -3,7 +3,7 @@
     <metadata>
         <id>pdfio_native.redist</id>
         <title>PDFio Library for VS2019+</title>
-        <version>1.6.0</version>
+        <version>1.6.1</version>
         <authors>Michael R Sweet</authors>
         <owners>michaelrsweet</owners>
         <projectUrl>https://github.com/michaelrsweet/pappl</projectUrl>

testpdfio.c

@@ -3486,7 +3486,7 @@ write_pdfa_file(
 
   // Embed a base font, which are not allowed for PDF/A
   testBegin("pdfioFileCreateFontObjFromBase(Helvetica)");
-  if ((font = pdfioFileCreateFontObjFromBase(pdf, "Helvetica")) != NULL)
+  if (pdfioFileCreateFontObjFromBase(pdf, "Helvetica") != NULL)
   {
     testEnd(false);
     goto done;

ttf.c

@@ -608,7 +608,7 @@ ttfGetExtents(
     }
 
     // Find its width...
-    if ((widths = font->widths[ch / 256]) != NULL)
+    if (ch < TTF_FONT_MAX_CHAR && (widths = font->widths[ch / 256]) != NULL)
     {
       if (first)
       {