Initial public release

.dir-locals.el

+((nil . ((indent-tabs-mode . t)))
+ (c-mode . ((c-file-style . "BSD"))))

.gitignore

+Makefile
+Makefile.in
+.deps/
+.libs/
+*.o
+*.lo
+*.la
+*~
+*.[1-9]
+*.gcda
+*.gcno
+.dirstamp
+
+/aclocal.m4
+/ar-lib
+/autom4te.cache/
+/compile
+/config.guess
+/config.h
+/config.h.in
+/config.log
+/config.status
+/config.sub
+/configure
+/depcomp
+/install-sh
+/libtool
+/ltmain.sh
+/missing
+/stamp-h1
+/test-driver
+/m4/
+
+/src/vcc_pesi_debug_if.[ch]
+/src/vcc_pesi_if.[ch]
+/src/vmod_*rst
+/src/VSC_pesi.c
+/src/VSC_pesi.h
+
+/src/tests/*.log
+/src/tests/*.trs
+/src/test-suite.log
+
+/src/coverage

CONTRIBUTING.rst

+CONTRIBUTING
+============
+
+To contribute code or documentation, submit a pull request at the
+`source repository website
+<https://gitlab.com/uplex/varnish/libvdp-pesi>`_.
+
+If you have a problem or discover a bug, you can post an `issue
+<https://gitlab.com/uplex/varnish/libvdp-pesi/issues>`_ at
+the website. You can also write to <varnish-support@uplex.de>.
+
+For developers
+--------------
+
+The VDP depends heavily on function calls that are internal to
+Varnish, and are not part of the public APIs provided for VMODs and
+delivery or fetch processors. This is why the build requires a Varnish
+source tree, identified with the ``VARNISHSRC`` variable in the
+invocation of ``configure``, as described in `INSTALL.rst
+<INSTALL.rst>`_. Some of the function and struct definitions that are
+declared static in the Varnish source are copied in the
+``src/foreign`` directory of the VDP source.
+
+Elements of the Varnish code that are not public may be changed
+without notice in future versions. In that case, the VDP code will
+have to be updated as the need arises.
+
+The VDP source code is in C, and compilation has been tested with gcc
+and clang. The code MUST always compile successfully with both of
+them.
+
+The build specifies C99 conformance for C sources (``-std=c99``). All
+compiler warnings are turned on, and all warnings are considered
+errors (``-Werror -Wall -Wextra``).  The code MUST always build
+without warnings or errors under these constraints.
+
+By default, ``CFLAGS`` is set to ``-g -O2``, so that symbols are
+included in the shared library, and optimization is at level
+``O2``. To change or disable these options, set ``CFLAGS`` explicitly
+before calling ``configure`` (it may be set to the empty string).
+
+For development/debugging cycles, the ``configure`` option
+``--enable-debugging`` is recommended (off by default). This will turn
+off optimizations and function inlining, so that a debugger will step
+through the code as expected.
+
+Experience has shown that adding ``-ggdb3`` to ``CFLAGS`` is
+beneficial if you need to examine the VDP with the gdb debugger. The
+shared object for a VDP (as for VMODs) is loaded from a directory
+relative to the Varnish home directory (by default
+``/usr/local/var/$INSTANCE`` for development builds). A debugger needs
+to locate the shared object from that relative path to load its
+symbols, so the Varnish home directory should be the current working
+directory when the debugger is run. For example::
+
+  # To run gdb and examine a coredump
+  $ cd /usr/local/var/myinstance
+  $ gdb /usr/local/sbin/varnishd /path/to/coredump
+
+By default, the VDP is built with the stack protector enabled
+(compile option ``-fstack-protector``), but it can be disabled with
+the ``configure`` option ``--disable-stack-protector``.

COPYING

+See LICENSE for details.
+

INSTALL.rst

+INSTALLATION
+============
+
+RPMs
+~~~~
+
+Binary, debuginfo and source RPMs for the VDP are available at:
+
+	https://pkg.uplex.de/
+
+The packages are built for Enterprise Linux 7 (el7), and hence will
+run on compatible distros (such as RHEL7, Fedora, CentOS 7 and Amazon
+Linux).
+
+To add the repo to your YUM configuration::
+
+  yum-config-manager --add-repo https://pkg.uplex.de/rpm/7/uplex-varnish/x86_64/
+
+The RPM for the VDP requires a Varnish installation from the official
+packages:
+
+	https://packagecloud.io/varnishcache
+
+You can then install the VDP with::
+
+  yum install --nogpgcheck vdp-pesi
+
+If you have problems or questions concerning the RPMs, post an issue
+to the source repository web site for the VDP, or contact
+<varnish-support@uplex.de>.
+
+Building from source
+~~~~~~~~~~~~~~~~~~~~
+
+The VDP is built against both a Varnish development installation *and*
+a Varnish source tree. The Varnish source tree must be built, so that
+generated sources are present; that is, its build process must be
+carried out at least as far the execution of ``make``.  The build
+version of installed Varnish must match the version of the source
+tree; this means that the "commit ID" portion of the version string of
+installed Varnish must match the HEAD of the source tree.  A simple
+solution is to build and install Varnish from the source tree.  If
+Varnish is installed by other means (for example from package), then
+the commit IDs must match.
+
+For the installation, the autotools use ``pkg-config(1)`` to locate
+the necessary header files and other resources for Varnish. The root
+directory of the source tree is identified by the variable
+``VARNISHSRC`` in the invocation of ``configure``.
+
+This sequence will install the VDP::
+
+  > ./autogen.sh	# for builds from the git repo
+  > ./configure VARNISHSRC=/path/to/source/tree
+  > make
+  > make check		# to run unit tests in src/tests/*.vtc
+  > make distcheck	# run check and prepare a distribution tarball
+  > sudo make install
+
+See `CONTRIBUTING.rst <CONTRIBUTING.rst>`_ for notes about building
+from source.
+
+If you have installed Varnish in non-standard directories, call
+``autogen.sh`` and ``configure`` with the ``PKG_CONFIG_PATH``
+environment variable set to include the paths where the ``.pc`` file
+can be located for ``varnishapi``.  For example, when varnishd
+configure was called with ``--prefix=$PREFIX``, use::
+
+  > PKG_CONFIG_PATH=${PREFIX}/lib/pkgconfig
+  > export PKG_CONFIG_PATH
+
+By default, the ``configure`` script installs the VDP in the VMOD
+directory for Varnish, determined via ``pkg-config(1)``. The VMOD
+installation directory can be overridden by passing the ``VMOD_DIR``
+variable to ``configure``.
+
+Other files such as the man-page are installed in the locations
+determined by ``configure``, which inherits its default ``--prefix``
+setting from Varnish.

LICENSE

+Copyright 2019 - 2021 UPLEX Nils Goroll Systemoptimierung
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.

Makefile.am

+ACLOCAL_AMFLAGS = -I m4 -I ${VARNISHAPI_DATAROOTDIR}/aclocal
+
+SUBDIRS = src
+
+DISTCHECK_CONFIGURE_FLAGS = \
+	VMOD_DIR='$${libdir}/varnish/vmods'
+
+EXTRA_DIST = README.rst LICENSE COPYING CONTRIBUTING.rst INSTALL.rst
+
+doc_DATA = README.rst LICENSE COPYING CONTRIBUTING.rst INSTALL.rst
+
+README.rst: src/vdp_pesi.vcc
+	$(MAKE) $(AM_MAKEFLAGS) -C src vmod_pesi.man.rst
+	cp src/vmod_pesi.man.rst README.rst
+
+coverage:
+	$(MAKE) $(AM_MAKEFLAGS) -C src coverage
+
+%.1 %.2 %.3 %.4 %.5 %.6 %.7 %.8 %.9:
+if HAVE_RST2MAN
+	${RST2MAN} $< $@
+else
+	@echo "========================================"
+	@echo "You need rst2man installed to make dist"
+	@echo "========================================"
+	@false
+endif

autogen.sh

+#!/bin/sh
+
+warn() {
+	echo "WARNING: $@" 1>&2
+}
+
+case `uname -s` in
+Darwin)
+	LIBTOOLIZE=glibtoolize
+	;;
+FreeBSD)
+	LIBTOOLIZE=libtoolize
+	;;
+Linux)
+	LIBTOOLIZE=libtoolize
+	;;
+SunOS)
+	LIBTOOLIZE=libtoolize
+	;;
+*)
+	warn "unrecognized platform:" `uname -s`
+	LIBTOOLIZE=libtoolize
+esac
+
+automake_version=`automake --version | tr ' ' '\n' | egrep '^[0-9]\.[0-9a-z.-]+'`
+if [ -z "$automake_version" ] ; then
+	warn "unable to determine automake version"
+else
+	case $automake_version in
+		0.*|1.[0-8]|1.[0-8][.-]*)
+			warn "automake ($automake_version) detected; 1.9 or newer recommended"
+			;;
+		*)
+			;;
+	esac
+fi
+
+# check for varnishapi.m4 in custom paths
+dataroot=$(pkg-config --variable=datarootdir varnishapi 2>/dev/null)
+if [ -z "$dataroot" ] ; then
+	cat >&2 <<'EOF'
+Package varnishapi was not found in the pkg-config search path.
+Perhaps you should add the directory containing `varnishapi.pc'
+to the PKG_CONFIG_PATH environment variable
+EOF
+	exit 1
+fi
+set -ex
+aclocal -I m4 -I ${dataroot}/aclocal
+$LIBTOOLIZE --copy --force
+autoheader
+automake --add-missing --copy --foreign
+autoconf

configure.ac

+AC_PREREQ(2.68)
+AC_COPYRIGHT([Copyright 2019 - 2021  UPLEX - Nils Goroll Systemoptimierung])
+AC_INIT([libvdp-pesi], [trunk], [varnish-support@uplex.de], [vdp-pesi])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_SRCDIR(src/vdp_pesi.vcc)
+AM_CONFIG_HEADER(config.h)
+AC_CANONICAL_SYSTEM
+AC_LANG(C)
+
+AM_INIT_AUTOMAKE([1.12 -Wall -Werror foreign parallel-tests])
+AM_SILENT_RULES([yes])
+AM_PROG_AR
+
+LT_PREREQ([2.2.6])
+LT_INIT([dlopen disable-static])
+
+AC_PROG_CC
+AC_PROG_CC_STDC
+if test "x$ac_cv_prog_cc_c99" = xno; then
+	AC_MSG_ERROR([Could not find a C99 compatible compiler])
+fi
+AC_PROG_CPP
+
+AX_PTHREAD(,[AC_MSG_ERROR([Could not configure pthreads support])])
+
+LIBS="$PTHREAD_LIBS $LIBS"
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+CC="$PTHREAD_CC"
+
+AC_ARG_WITH([rst2man],
+	AS_HELP_STRING(
+		[--with-rst2man=PATH],
+		[Location of rst2man (auto)]),
+	[RST2MAN="$withval"],
+	AC_CHECK_PROGS(RST2MAN, [rst2man rst2man.py], []))
+AM_CONDITIONAL(HAVE_RST2MAN, [test "x$RST2MAN" != "xno"])
+
+AC_ARG_WITH([lcov],
+	AS_HELP_STRING(
+		[--with-lcov=PATH],
+		[Location of lcov to generate coverage data (auto)]),
+	[LCOV="$withval"],
+	AC_CHECK_PROGS(LCOV, [lcov], []))
+AM_CONDITIONAL(HAVE_LCOV, [test -n "$LCOV"])
+
+AC_ARG_WITH([genhtml],
+	AS_HELP_STRING(
+		[--with-genhtml=PATH],
+		[Location of genhtml to generate coverage reports (auto)]),
+	[GENHTML="$withval"],
+	AC_CHECK_PROGS(GENHTML, [genhtml], []))
+AM_CONDITIONAL(HAVE_GENHTML, [test -n "$GENHTML"])
+
+m4_ifndef([VARNISH_PREREQ], AC_MSG_ERROR([Need varnish.m4 -- see README.rst]))
+
+VARNISH_PREREQ([trunk])
+VARNISH_VMODS([pesi pesi_debug])
+VARNISH_COUNTERS([pesi])
+
+VMOD_TESTS="$(cd $srcdir/src && echo tests/*.vtc)"
+AC_SUBST(VMOD_TESTS)
+
+PKG_CHECK_VAR([LIBVARNISHAPI_LIBDIR], [varnishapi], [libdir])
+AC_SUBST([VARNISH_LIBRARY_PATH],
+	[$LIBVARNISHAPI_LIBDIR:$LIBVARNISHAPI_LIBDIR/varnish])
+
+# Checks for C functions
+AC_CHECK_FUNCS([memset])
+AC_CHECK_FUNCS([strchr])
+
+# C headers
+AC_CHECK_HEADERS([limits.h])
+AC_CHECK_HEADERS([stddef.h])
+AC_CHECK_HEADER_STDBOOL
+
+# C types
+AC_TYPE_SIZE_T
+AC_TYPE_SSIZE_T
+AC_TYPE_UINT8_T
+AC_TYPE_UINT16_T
+AC_TYPE_UINT32_T
+AC_TYPE_UINT64_T
+
+AC_C_INLINE
+
+AC_ARG_VAR([VARNISHSRC], [path to Varnish source tree (REQUIRED)])
+if test "${VARNISHSRC+set}" != set; then
+   AC_MSG_ERROR([VARNISHSRC must be set (path to Varnish source tree)])
+fi
+AC_CHECK_FILE(["$VARNISHSRC/include/miniobj.h"],
+	[AC_MSG_RESULT([VARNISHSRC (Varnish source dir)... $VARNISHSRC])],
+	[AC_MSG_ERROR([VARNISHSRC ($VARNISHSRC) is not a Varnish source dir])])
+
+# --enable-stack-protector
+AC_ARG_ENABLE(stack-protector,
+       AS_HELP_STRING([--enable-stack-protector],[enable stack protector (default is YES)]),
+       [],
+       [enable_stack_protector=yes])
+
+if test "x$enable_stack_protector" != "xno"; then
+	AX_CHECK_COMPILE_FLAG([-fstack-protector],
+		AX_CHECK_LINK_FLAG([-fstack-protector],
+			[CFLAGS="${CFLAGS} -fstack-protector"], [], []),
+		[], [])
+fi
+
+# --enable-debugging
+AC_ARG_ENABLE(debugging,
+	AS_HELP_STRING([--enable-debugging],[enable debugging (default is NO)]),
+	[],
+	[enable_debugging=no])
+
+# AC_PROG_CC sets CFLAGS to '-g -O2' unless already set, so there's no
+# need to add -g. Disable or change by explicitly setting CFLAGS. If
+# this option is enabled, then -Og or -O0 becomes the last
+# optimization option, and hence takes precedence.
+if test "x$enable_debugging" != "xno"; then
+	CFLAGS="${CFLAGS} -fno-inline"
+	AX_CHECK_COMPILE_FLAG([-Og],
+		[CFLAGS="${CFLAGS} -O0 -Og"],
+		[CFLAGS="${CFLAGS} -O0"],
+		[])
+fi
+
+AC_CONFIG_FILES([
+	Makefile
+	src/Makefile
+])
+AC_OUTPUT

src/Makefile.am

+AUTOMAKE_OPTIONS = subdir-objects
+
+AM_CFLAGS = $(VARNISHAPI_CFLAGS) -I$(VARNISHSRC)/include \
+	-I$(VARNISHSRC)/bin/varnishd -I$(VARNISHSRC)/lib/libvgz \
+	-Wall -Werror -Wextra -std=c99
+AM_LDFLAGS = $(VARNISHAPI_LIBS) $(VMOD_LDFLAGS) -ldl
+
+vmod_LTLIBRARIES = libvmod_pesi.la libvmod_pesi_debug.la
+
+libvmod_pesi_la_SOURCES = \
+	misc.h \
+	misc.c \
+	pesi.h \
+	pesi_flags.h \
+	pesi_tree.h \
+	pesi.c \
+	node.h \
+	node_assert.h \
+	node_head.h \
+	node_mempool.h \
+	node.c \
+	vmod_pesi.c \
+	vdp_pesi.h \
+	vdp_pesi.c \
+	debug.h \
+	tbl_set_parameter.h \
+	foreign/qdef.h \
+	foreign/from_cache_esi_deliver.h \
+	foreign/from_cache_esi_deliver.c
+
+nodist_libvmod_pesi_la_SOURCES = \
+	vcc_pesi_if.c \
+	vcc_pesi_if.h \
+	VSC_pesi.c \
+	VSC_pesi.h
+
+libvmod_pesi_debug_la_SOURCES = \
+	vmod_pesi_debug.c
+
+nodist_libvmod_pesi_debug_la_SOURCES = \
+	vcc_pesi_debug_if.c \
+	vcc_pesi_debug_if.h
+
+dist_man_MANS = vdp_pesi.3
+
+@BUILD_VSC_PESI@
+
+# -- pesi
+
+vmod_pesi.lo: vcc_pesi_if.h VSC_pesi.c VSC_pesi.h misc.h node_mempool.h \
+	pesi_flags.h vdp_pesi.h tbl_set_parameter.h
+
+vdp_pesi.lo: debug.h vdp_pesi.h node.h node_assert.h pesi.h pesi_flags.h \
+	pesi_tree.h misc.h
+
+misc.lo: misc.h debug.h
+
+node.lo: debug.h node.h node_assert.h node_mempool.h pesi.h misc.h vcc_pesi_if.h
+
+pesi.lo: debug.h VSC_pesi.h pesi_tree.h pesi_flags.h pesi.h
+
+vcc_pesi_if.h vmod_pesi.rst vmod_pesi.man.rst: vcc_pesi_if.c
+
+vcc_pesi_if.c: vdp_pesi.vcc
+	$(AM_V_VMODTOOL) $(PYTHON) $(VMODTOOL) -o vcc_pesi_if $(srcdir)/vdp_pesi.vcc
+
+vdp_pesi.3: vmod_pesi.man.rst
+	$(AM_V_GEN) $(RST2MAN) vmod_pesi.man.rst vdp_pesi.3
+
+# -- pesi_debug
+
+vcc_pesi_debug_if.h vmod_pesi_debug.rst vmod_pesi_debug.man.rst: vcc_pesi_debug_if.c
+
+vcc_pesi_debug_if.c: vmod_pesi_debug.vcc
+	$(AM_V_VMODTOOL) $(PYTHON) $(VMODTOOL) -o vcc_pesi_debug_if $(srcdir)/vmod_pesi_debug.vcc
+
+AM_TESTS_ENVIRONMENT = \
+	PATH="$(VMOD_TEST_PATH)" \
+	LD_LIBRARY_PATH="$(VARNISH_LIBRARY_PATH)"
+TEST_EXTENSIONS = .vtc
+TESTFLAGS = -v -t 20
+VTC_LOG_COMPILER = varnishtest ${TESTFLAGS}
+AM_VTC_LOG_FLAGS = -Dvmod_pesi="$(VMOD_PESI)" \
+	-Dvmod_pesi_debug="$(VMOD_PESI_DEBUG)" \
+	-p vcl_path=$(abs_srcdir)/tests
+
+# To test an individual VTC test named test.vtc:
+# $ make check TESTS=tests/test.vtc
+
+TESTS = @VMOD_TESTS@
+
+gcov: clean
+	$(AM_V_at)$(MAKE) $(AM_MAKEFLAGS) CC=gcc \
+		CFLAGS="${AM_CFLAGS} --coverage -fno-inline -g -O0" check
+
+# Set QUIET=-q for non-verbose builds, otherwise set to empty.
+QUIET_0 = -q
+QUIET_ = $(QUIET_@AM_DEFAULT_V@)
+QUIET = $(QUIET_@AM_V@)
+
+coverage/lcov.info: gcov
+if HAVE_LCOV
+	$(AM_V_at)@mkdir $(builddir)/coverage
+	$(AM_V_GEN) $(LCOV) $(QUIET) -c -d . -o  $(builddir)/coverage/lcov.info
+else
+	@echo "================================================="
+	@echo "You need lcov installed to generate coverage data"
+	@echo "================================================="
+	@false
+endif
+
+coverage: coverage/lcov.info
+if HAVE_GENHTML
+	$(AM_V_GEN) $(GENHTML) $(QUIET) $(builddir)/coverage/lcov.info \
+		-o  $(builddir)/coverage
+else
+	@echo "======================================================="
+	@echo "You need genhtml installed to generate coverage reports"
+	@echo "======================================================="
+	@false
+endif
+
+EXTRA_DIST = \
+	vdp_pesi.vcc \
+	vmod_pesi_debug.vcc \
+	pesi.vsc \
+	$(VMOD_TESTS) \
+	$(builddir)/tests/debug.inc.vcl
+
+CLEANFILES = \
+	$(builddir)/vcc_pesi_if.c \
+	$(builddir)/vcc_pesi_if.h \
+	$(builddir)/vmod_pesi.rst \
+	$(builddir)/vmod_pesi.man.rst \
+	$(builddir)/vcc_pesi_debug_if.c \
+	$(builddir)/vcc_pesi_debug_if.h \
+	$(builddir)/vmod_pesi_debug.rst \
+	$(builddir)/vmod_pesi_debug.man.rst \
+	$(builddir)/vdp_pesi.3 \
+	$(builddir)/VSC_pesi.c \
+	$(builddir)/VSC_pesi.h \
+	$(builddir)/*.gcda \
+	$(builddir)/*.gcno
+
+clean-local:
+	@rm -rf $(builddir)/coverage

src/debug.h

+#ifdef DEBUG
+#include <stdio.h>
+#include "vtim.h"
+#define Debug(fmt, ...) printf(fmt, __VA_ARGS__)
+#define VSLdbgv(tng, fmt, ...)						\
+	do {								\
+		VSL(SLT_Debug, 0, "xid=%u t=%.6f " fmt,			\
+		    VXID((tng)->vsl->wid), VTIM_real(), __VA_ARGS__);	\
+		VSLb((tng)->vsl, SLT_Debug, fmt, __VA_ARGS__);		\
+	} while(0)
+
+#define VSLdbg(tng, msg)				\
+	do {						\
+		VSL(SLT_Debug, 0, "xid=%u t=%.6f " msg,	\
+		    VXID((tng)->vsl->wid), VTIM_real());	\
+		VSLb((tng)->vsl, SLT_Debug, msg);		\
+	} while(0)
+#define VSL0dbg(...) VSL(SLT_Debug, 0, __VA_ARGS__)
+#else
+#define VSLdbgv(tng, fmt, ...)	(void)0
+#define VSLdbg(tng, msg)	(void)0
+#define VSL0dbg(...)	(void)0
+#define Debug(fmt, ...) /**/
+#endif

src/flint.lnt

+-emacro(655, OC_F_FINAL)
+-efile(766, "../config.h")
+// we do not lint the VSC files
+-esym(526, VSC_pesi_New, VSC_pesi_Destroy)
+-esym(755, VSC_pesi_size)
+-esym(769, *INVALID)
\ No newline at end of file

src/flint.sh

+#!/bin/sh
+
+if [ "x$1" = "x-ok" -a -f _.fl ] ; then
+	echo "Saved as reference"
+	mv _.fl _.fl.old
+	exit 0
+fi
+
+flexelint \
+	-D__FLEXELINT__ \
+	${VARNISHSRC}/flint.lnt \
+	flint.lnt \
+	-zero \
+	-I.. \
+	-I${VARNISHSRC}/include \
+	-I${VARNISHSRC}/bin/varnishd \
+	-I${VARNISHSRC}/lib/libvgz \
+	$(ls *.c | grep -v VSC_) \
+	foreign/*.c \
+	2>&1 | tee _.fl
+
+if [ -f _.fl.old ] ; then
+	diff -u _.fl.old _.fl
+fi
+
+if [ "x$1" = "x-ok" ] ; then
+	echo "Saved as reference"
+	mv _.fl _.fl.old
+fi

src/foreign/from_cache_esi_deliver.c

+/*-
+ * Copyright (c) 2011 Varnish Software AS
+ * All rights reserved.
+ *
+ * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * VPED - Varnish Parallel Esi Delivery
+ *
+ * modded version for parallel PESI
+ *
+ * actual esi handling is in vdp_pesi.c, this file contains VDPs we keep
+ * functionally equivalent to varnish-cache built-in esi, just with changed
+ * signatures & data structures
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "cache/cache.h"
+#include "cache/cache_filter.h"
+
+//#include "vtim.h"
+//#include "cache_esi.h"
+#include "vend.h"
+#include "vgz.h"
+
+#include "from_cache_esi_deliver.h"
+
+/*---------------------------------------------------------------------
+ * If a gzip'ed ESI object includes a ungzip'ed object, we need to make
+ * it looked like a gzip'ed data stream.  The official way to do so would
+ * be to fire up libvgz and gzip it, but we don't, we fake it.
+ *
+ * First, we cannot know if it is ungzip'ed on purpose, the admin may
+ * know something we don't.
+ *
+ * What do you mean "BS ?"
+ *
+ * All right then...
+ *
+ * The matter of the fact is that we simply will not fire up a gzip in
+ * the output path because it costs too much memory and CPU, so we simply
+ * wrap the data in very convenient "gzip copy-blocks" and send it down
+ * the stream with a bit more overhead.
+ */
+
+static int v_matchproto_(vdp_fini_f)
+vped_pretend_gzip_fini(struct vdp_ctx *vdc, void **priv)
+{
+	(void)vdc;
+	*priv = NULL;
+	return (0);
+}
+
+static int v_matchproto_(vdp_bytes_f)
+vped_pretend_gzip_bytes(struct vdp_ctx *vdx, enum vdp_action act, void **priv,
+    const void *pv, ssize_t l)
+{
+	uint8_t buf1[5], buf2[5];
+	const uint8_t *p;
+	uint16_t lx;
+	struct nexus_gzip *gz;
+
+	CHECK_OBJ_NOTNULL(vdx, VDP_CTX_MAGIC);
+	CAST_OBJ_NOTNULL(gz, *priv, NEXUS_GZIP_MAGIC);
+
+	if (l == 0)
+		return (VDP_bytes(vdx, act, pv, l));
+
+	p = pv;
+
+	AN (gz->is);