Initial checkin.

.gitignore

@@ -0,0 +1,6 @@
+*.1.dylib
+*.a
+*.o
+*.so
+/testpdfio
+

LICENSE

@@ -0,0 +1,202 @@
+
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Makefile

@@ -0,0 +1,134 @@
+#
+# Makefile for pdfio.
+#
+# Copyright © 2021 by Michael R Sweet.
+#
+# Licensed under Apache License v2.0.  See the file "LICENSE" for more
+# information.
+#
+
+# POSIX makefile
+.POSIX:
+
+# Variables...
+AR		=	ar
+ARFLAGS		=	cr
+CC		=	cc
+CFLAGS		=
+CODESIGN_IDENTITY =	Developer ID
+COMMONFLAGS	=	-Os -g
+CPPFLAGS	=
+DESTDIR		=	$(DSTROOT)
+DSO		=	cc
+DSOFLAGS	=	
+DSONAME		=
+LDFLAGS		=
+LIBS		=	-lz
+RANLIB		=	ranlib
+VERSION		=	1.0
+prefix		=	/usr/local
+
+
+# Base rules
+.SUFFIXES:	.c .h .o
+.c.o:
+	$(CC) $(CFLAGS) $(CPPFLAGS) $(COMMONFLAGS) -c $<
+
+
+# Files
+LIBOBJS		=	\
+			pdfio-common.o \
+			pdfio-read.o \
+			pdfio-write.o
+OBJS		=	\
+			$(LIBOBJS) \
+			testpdfio.o
+TARGETS		=	\
+			$(DSONAME) \
+			libpdfio.a \
+			testpdfio
+
+
+# Make everything
+all:		$(TARGETS)
+
+all-shared:
+	if test `uname` = Darwin; then \
+		$(MAKE) DSONAME="libpdfio.1.dylib" -$(MAKEFLAGS) all; \
+	else
+		$(MAKE) DSONAME="libpdfio.so.1" -$(MAKEFLAGS) all; \
+	fi
+
+
+# Clean everything
+clean:
+	rm -f $(TARGETS) $(OBJS)
+
+
+# Install everything
+install:	$(TARGETS)
+	-mkdir -p $(DESTDIR)$(prefix)/include
+	cp pdfio.h $(DESTDIR)$(prefix)/include
+	-mkdir -p $(DESTDIR)$(prefix)/lib
+	cp libpdfio.a $(DESTDIR)$(prefix)/lib
+	$(RANLIB) $(DESTDIR)$(prefix)/lib/libpdfio.a
+	if test "x$(DSONAME)" = xlibpdfio.so.1; then \
+		cp $(DSONAME) $(DESTDIR)$(prefix)/lib; \
+		ln -sf libpdfio.so.1 $(DESTDIR)$(prefix)/lib/libpdfio.so; \
+	elif test "x$(DSONAME)" = xlibpdfio.1.dylib; then \
+		cp $(DSONAME) $(DESTDIR)$(prefix)/lib; \
+		codesign -s "$(CODESIGN_IDENTITY)" -o runtime --timestamp $(DESTDIR)$(prefix)/lib/libpdfio.1.dylib; \
+		ln -sf libpdfio.1.dylib $(DESTDIR)$(prefix)/lib/libpdfio.dylib; \
+	fi
+	-mkdir -p $(DESTDIR)$(prefix)/lib/pkgconfig
+	echo '"prefix="$(prefix)"' >>$(DESTDIR)$(prefix)/lib/pkgconfig/pdfio.pc
+	cat pdfio.pc.in >$(DESTDIR)$(prefix)/lib/pkgconfig/pdfio.pc
+	-mkdir -p $(DESTDIR)$(prefix)/share/doc
+	cp pdfio.html LICENSE NOTICE $(DESTDIR)$(prefix)/share/doc
+	-mkdir -p $(DESTDIR)$(prefix)/share/man/man3
+	cp pdfio.3 LICENSE NOTICE $(DESTDIR)$(prefix)/share/man/man3
+
+install-shared:
+	if test `uname` = Darwin; then \
+		$(MAKE) DSONAME="libpdfio.1.dylib" -$(MAKEFLAGS) install; \
+	else
+		$(MAKE) DSONAME="libpdfio.so.1" -$(MAKEFLAGS) install; \
+	fi
+
+
+# Test everything
+test:	testpdfio
+	./testpdfio
+
+
+# pdfio library
+libpdfio.a:		$(LIBOBJS)
+	$(AR) $(ARFLAGS) $@ $(LIBOBJS)
+	$(RANLIB) $@
+
+libpdfio.so.1:		$(LIBOBJS)
+	$(CC) $(DSOFLAGS) $(COMMONFLAGS) -shared -o $@ -Wl,soname,$@ $(LIBOBJS) $(LIBS)
+
+libpdfio.1.dylib:	$(LIBOBJS)
+	$(CC) $(DSOFLAGS) $(COMMONFLAGS) -dynamiclib -o $@ -install_name $(prefix)/lib/$@ -current_version $(VERSION) -compatibility_version 1.0 $(LIBOBJS) $(LIBS)
+
+
+# pdfio test program
+testpdfio:	testpdfio.o libpdfio.a
+	$(CC) $(LDFLAGS) $(COMMONFLAGS) -o $@ testpdfio.o libpdfio.a $(LIBS)
+
+
+# Dependencies
+$(OBJS):	pdfio.h Makefile
+
+
+# Make documentation using Codedoc <https://www.msweet.org/codedoc>
+DOCFLAGS	=	\
+			--author "Michael R Sweet" \
+			--copyright "Copyright (c) 2021 by Michael R Sweet" \
+			--docversion $(VERSION)
+
+doc:
+	codedoc $(DOCFLAGS) --title "pdfio Programming Manual" pdfio.h $(LIBOBJS:.o=.c) --body pdfio.md pdfio.xml >pdfio.html
+	codedoc $(DOCFLAGS) --title "pdf read/write library" --man pdfio --section 3 --body pdfio.md pdfio.xml >pdfio.3
+	rm -f pdfio.xml

NOTICE

@@ -0,0 +1,20 @@
+pdfio - PDF Read/Write Library
+
+Copyright © 2021 by Michael R Sweet.
+
+(Optional) Exceptions to the Apache 2.0 License:
+================================================
+
+As an exception, if, as a result of your compiling your source code, portions
+of this Software are embedded into an Object form of such source code, you
+may redistribute such embedded portions in such Object form without complying
+with the conditions of Sections 4(a), 4(b) and 4(d) of the License.
+
+In addition, if you combine or link compiled forms of this Software with
+software that is licensed under the GPLv2 ("Combined Software") and if a
+court of competent jurisdiction determines that the patent provision (Section
+3), the indemnity provision (Section 9) or other Section of the License
+conflicts with the conditions of the GPLv2, you may retroactively and
+prospectively choose to deem waived or otherwise exclude such Section(s) of
+the License, but only in their entirety and only with respect to the Combined
+Software.

README.md

@@ -0,0 +1,80 @@
+pdfio - PDF Read/Write Library
+==============================
+
+pdfio is a simple C library for reading and writing PDF files.  The primary
+goals of pdfio are:
+
+- Read any PDF file with or without encryption or linearization
+- Write PDF files without encryption or linearization
+- Extract or embed useful metadata (author, creator, page information, etc.)
+- "Filter" PDF files, for example to extract a range of pages or to embed fonts
+  that are missing from a PDF
+- Provide access to objects used for each page
+
+pdfio is *not* concerned with rendering or viewing a PDF file, although a PDF
+RIP or viewer could be written using it.
+
+
+Installing pdfio
+----------------
+
+pdfio comes with a portable makefile that will work on any POSIX-compliant
+system with zlib installed.  To make it, run:
+
+    make all
+
+To test it, run:
+
+    make test
+
+To install it, run:
+
+    make install
+
+If you want a shared library, run:
+
+    make all-shared
+    make install-shared
+
+The default installation location is "/usr/local".  Pass the `prefix` variable
+to make to install it to another location:
+
+    make install prefix=/some/other/directory
+
+The makefile installs the pdfio header to "${prefix}/include", the library to
+"${prefix}/lib", the `pkg-config` file to "${prefix}/lib/pkgconfig", the man
+page to "${prefix}/share/man/man3", and the documentation to
+"${prefix}/share/doc".
+
+The makefile supports the following variables that can be specified in the make
+command or as environment variables:
+
+- `AR`: the library archiver (default "ar")
+- `ARFLAGS`: options for the library archiver (default "cr")
+- `CC`: the C compiler (default "cc")
+- `CFLAGS`: options for the C compiler (default "")
+- `CODESIGN_IDENTITY`: the identity to use when code signing the shared library
+  on macOS (default "Developer ID")
+- `COMMONFLAGS`: options for the C compiler and linker (typically architecture
+  and optimization options, default is "-Os -g")
+- `CPPFLAGS`: options for the C preprocessor (default "")
+- `DESTDIR" and "DSTROOT`: specifies a root directory when installing
+  (default is "", specify only one)
+- `DSOFLAGS`: options for the C compiler when linking the shared library
+  (default "")
+- `LDFLAGS`: options for the C compiler when linking the test programs
+  (default "")
+- `LIBS`: library options when linking the test programs (default "-lz")
+- `RANLIB`: program that generates a table-of-contents in a library
+  (default "ranlib")
+- `prefix`: specifies the installation directory (default "/usr/local")
+
+
+Legal Stuff
+-----------
+
+pdfio is Copyright © 2021 by Michael R Sweet.
+
+This software is licensed under the Apache License Version 2.0 with an
+(optional) exception to allow linking against GPL2/LGPL2 software.  See the
+files "LICENSE" and "NOTICE" for more information.

pdfio-common.c

@@ -0,0 +1,14 @@
+//
+// Common support functions for pdfio.
+//
+// Copyright © 2021 by Michael R Sweet.
+//
+// Licensed under Apache License v2.0.  See the file "LICENSE" for more
+// information.
+//
+
+//
+// Include necessary headers...
+//
+
+#include "pdfio-private.h"

pdfio-private.h

@@ -0,0 +1,56 @@
+//
+// Private header file for pdfio.
+//
+// Copyright © 2021 by Michael R Sweet.
+//
+// Licensed under Apache License v2.0.  See the file "LICENSE" for more
+// information.
+//
+
+#ifndef PDFIO_PRIVATE_H
+#  define PDFIO_PRIVATE_H
+
+//
+// Include necessary headers...
+//
+
+
+//
+// Visibility and other annotations...
+//
+
+#  if defined(__has_extension) || defined(__GNUC__)
+#    define PDFIO_INTERNAL	__attribute__ ((visibility("hidden")))
+#    define PDFIO_PRIVATE	__attribute__ ((visibility("default")))
+#    define PDFIO_NONNULL(...)	__attribute__ ((nonnull(__VA_ARGS__)))
+#    define PDFIO_NORETURN	__attribute__ ((noreturn))
+#  else
+#    define PDFIO_INTERNAL
+#    define PDFIO_PRIVATE
+#    define PDFIO_NONNULL(...)
+#    define PDFIO_NORETURN
+#  endif // __has_extension || __GNUC__
+
+
+//
+// Debug macro...
+//
+
+#  ifdef DEBUG
+#    define PDFIO_DEBUG(...)	fprintf(stderr, __VA_ARGS__)
+#  else
+#    define PDFIO_DEBUG(...)
+#  endif // DEBUG
+
+
+//
+// Types and constants...
+//
+
+
+//
+// Functions...
+//
+
+
+#endif // !PDFIO_PRIVATE_H

pdfio-read.c

@@ -0,0 +1,14 @@
+//
+// PDF reading functions for pdfio.
+//
+// Copyright © 2021 by Michael R Sweet.
+//
+// Licensed under Apache License v2.0.  See the file "LICENSE" for more
+// information.
+//
+
+//
+// Include necessary headers...
+//
+
+#include "pdfio-private.h"

pdfio-write.c

@@ -0,0 +1,14 @@
+//
+// PDF writing functions for pdfio.
+//
+// Copyright © 2021 by Michael R Sweet.
+//
+// Licensed under Apache License v2.0.  See the file "LICENSE" for more
+// information.
+//
+
+//
+// Include necessary headers...
+//
+
+#include "pdfio-private.h"

pdfio.h

@@ -0,0 +1,57 @@
+//
+// Public header file for pdfio.
+//
+// Copyright © 2021 by Michael R Sweet.
+//
+// Licensed under Apache License v2.0.  See the file "LICENSE" for more
+// information.
+//
+
+#ifndef PDFIO_H
+#  define PDFIO_H
+
+//
+// Include necessary headers...
+//
+
+
+//
+// C++ magic...
+//
+
+#  ifdef __cplusplus
+extern "C" {
+#  endif // __cplusplus
+
+
+//
+// Visibility and other annotations...
+//
+
+#  if defined(__has_extension) || defined(__GNUC__)
+#    define PDFIO_PUBLIC	__attribute__ ((visibility("default")))
+#    define PDFIO_FORMAT(a,b)	__attribute__ ((__format__(__printf__, a,b)))
+#  else
+#    define PDFIO_PUBLIC
+#    define PDFIO_FORMAT(a,b)
+#  endif // __has_extension || __GNUC__
+
+
+//
+// Types and constants...
+//
+
+
+//
+// Functions...
+//
+
+
+//
+// C++ magic...
+//
+
+#  ifdef __cplusplus
+}
+#  endif // __cplusplus
+#endif // !PDFIO_H

pdfio.md

@@ -0,0 +1,15 @@
+Introduction
+============
+
+pdfio is a simple C library for reading and writing PDF files.  The primary
+goals of pdfio are:
+
+- Read any PDF file with or without encryption or linearization
+- Write PDF files without encryption or linearization
+- Extract or embed useful metadata (author, creator, page information, etc.)
+- "Filter" PDF files, for example to extract a range of pages or to embed fonts
+  that are missing from a PDF
+- Provide access to objects used for each page
+
+pdfio is *not* concerned with rendering or viewing a PDF file, although a PDF
+RIP or viewer could be written using it.

pdfio.pc.in

@@ -0,0 +1,7 @@
+Name: pdfio
+Description: PDF read/write library
+Version: 1.0
+URL: https://www.msweet.org/pdfio
+Requires.private: zlib >= 1.0
+Libs: -L${prefix}/lib -lpdfio
+Cflags: -I${prefix}/include

testpdfio.c

@@ -0,0 +1,29 @@
+//
+// Test program for pdfio.
+//
+// Copyright © 2021 by Michael R Sweet.
+//
+// Licensed under Apache License v2.0.  See the file "LICENSE" for more
+// information.
+//
+
+//
+// Include necessary headers...
+//
+
+#include "pdfio.h"
+
+
+//
+// 'main()' - Main entry for test program.
+//
+
+int					// O - Exit status
+main(int  argc,				// I - Number of command-line arguments
+     char *argv[])			// I - Command-line arguments
+{
+  (void)argc;
+  (void)argv;
+
+  return (0);
+}