#
# This Makefile builds the upb library as well as associated tests, tools, and
# language extensions.
#
# It does not use autoconf/automake/libtool in order to stay lightweight and
# avoid the need for running ./configure.
#
# Summary of compiler flags you may want to use:
#
# * -DNDEBUG: makes binary smaller and faster by removing sanity checks.
# * -O3: optimize for maximum speed
# * -fomit-frame-pointer: makes code smaller and faster by freeing up a reg.
#
# Threading:
# * -DUPB_USE_PTHREADS: configures upb to use pthreads r/w lock.
# * -DUPB_THREAD_UNSAFE: remove all thread-safety.
# * -pthread: required on GCC to enable pthreads (but what does it do?)
#
# Other:
# * -DUPB_UNALIGNED_READS_OK: makes code smaller, but not standard compliant

.PHONY: all clean tests test benchmarks benchmark descriptorgen

# Default rule: just build libupb.
all: lib

# Basic compiler/flag setup.
CC=gcc
CXX=g++
CFLAGS=-std=c99
INCLUDE=-Isrc -Itests -I.
USER_CFLAGS=$(strip $(shell test -f perf-cppflags && cat perf-cppflags))
CPPFLAGS=$(INCLUDE) -Wall -Wextra -Wno-missing-field-initializers $(USER_CFLAGS)
LDLIBS=-lpthread src/libupb.a

# Dependency generating. #######################################################

-include deps
# Unfortuantely we can't easily generate deps for benchmarks or tests because
# of the scheme we use that compiles the same source file multiple times with
# different -D options, which can include different header files.
deps: gen-deps.sh Makefile $(CORE) $(STREAM)
	@CPPFLAGS="$(CPPFLAGS)" ./gen-deps.sh $(CORE) $(STREAM)
	@echo Regenerating dependencies for src/...

$(ALLSRC): perf-cppflags


# Source files. ###############################################################

# Every source file used in upb should appear here.

# The core library -- the absolute minimum you must compile in to successfully
# bootstrap.
CORE= \
  src/descriptor.c \
  src/upb.c \
  src/upb_table.c \
  src/upb_string.c \
  src/upb_def.c \

# Common encoders/decoders and upb_msg -- you're almost certain to want these.
STREAM= \
  src/upb_decoder.c \
  src/upb_stdio.c \
  src/upb_textprinter.c \
  src/upb_strstream.c \
  src/upb_msg.c \
  src/upb_glue.c \

# Parts of core that are yet to be converted.
OTHERSRC=src/upb_encoder.c src/upb_text.c

BENCHMARKS_SRC= \
  benchmarks/main.c \
  benchmarks/parsestream.upb_table.c \
  benchmarks/parsetostruct.upb_table.c

TESTS_SRC= \
  tests/test_decoder.c \
  tests/test_def.c \
  tests/test_stream.c \
  tests/test_string.c \
  tests/tests.c \
  tests/test_vs_proto2.cc

ALLSRC=$(CORE) $(STREAM) $(BENCHMARKS_SRC) $(TESTS_SRC)


# Rules. #######################################################################

clean:
	rm -rf $(LIBUPB) $(LIBUPB_PIC)
	rm -rf $(call rwildcard,,*.o) $(call rwildcard,,*.lo) $(call rwildcard,,*.gcno) $(call rwildcard,,*.dSYM)
	rm -rf benchmark/google_messages.proto.pb benchmark/google_messages.pb.* benchmarks/b.* benchmarks/*.pb*
	rm -rf $(TESTS) tests/t.*
	rm -rf src/descriptor.pb
	rm -rf tools/upbc deps
	cd lang_ext/python && python setup.py clean --all

# Core library (libupb.a).
SRC=$(CORE) $(STREAM)
LIBUPB=src/libupb.a
LIBUPB_PIC=src/libupb_pic.a
lib: $(LIBUPB)

OBJ=$(patsubst %.c,%.o,$(SRC))
PICOBJ=$(patsubst %.c,%.lo,$(SRC))
$(LIBUPB): $(OBJ)
	@echo AR $(LIBUPB)
	@ar rcs $(LIBUPB) $(OBJ)
$(LIBUPB_PIC): $(PICOBJ)
	@echo AR $(LIBUPB_PIC)
	@ar rcs $(LIBUPB_PIC) $(PICOBJ)

%.o : %.c
	@echo CC $<
	@$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $<

%.lo : %.c
	@echo 'CC -fPIC' $<
	@$(CC) $(CFLAGS) $(CPPFLAGS) -c -o $@ $< -fPIC

# Override the optimization level for upb_def.o, because it is not in the
# critical path but gets very large when -O3 is used.
src/upb_def.o: src/upb_def.c
	@echo CC $<
	@$(CC) $(CFLAGS) $(CPPFLAGS) -O0 -c -o $@ $<

src/upb_def.lo: src/upb_def.c
	@echo 'CC -fPIC' $<
	@$(CC) $(CFLAGS) $(CPPFLAGS) -O0 -c -o $@ $< -fPIC


# Function to expand a wildcard pattern recursively.
rwildcard=$(strip $(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2)$(filter $(subst *,%,$2),$d)))


ifeq ($(shell uname), Darwin)
  CPPFLAGS += -I/usr/include/lua5.1
  LDFLAGS += -L/usr/local/lib -llua
else
  CFLAGS += $(strip $(shell pkg-config --silence-errors --cflags lua || pkg-config --cflags lua5.1))
  LDFLAGS += $(strip $(shell pkg-config --silence-errors --libs lua || pkg-config --libs lua5.1))
endif



lang_ext/lua/upb.so: lang_ext/lua/upb.lo
	$(CC) $(CFLAGS) $(CPPFLAGS) -shared -o $@ $< src/libupb_pic.a


# Regenerating the auto-generated files in src/.
src/descriptor.pb: src/descriptor.proto
	# TODO: replace with upbc
	protoc src/descriptor.proto -osrc/descriptor.pb

descriptorgen: src/descriptor.pb tools/upbc
	@# Regenerate descriptor_const.h
	./tools/upbc -o src/descriptor src/descriptor.pb
	cd src && xxd -i descriptor.pb > descriptor.c

# Language extensions.
python: $(LIBUPB_PIC)
	cd lang_ext/python && python setup.py build

# Tests. #######################################################################

tests/test.proto.pb: tests/test.proto
	# TODO: replace with upbc
	protoc tests/test.proto -otests/test.proto.pb

TESTS= \
  tests/test_string \
  tests/test_table \
  tests/test_def \
  tests/test_stream \
  tests/t.test_vs_proto2.googlemessage1 \
  tests/t.test_vs_proto2.googlemessage2 \
  tests/test.proto.pb \
  tests/tests

#    tests/test_decoder \

tests: $(TESTS)
$(TESTS): $(LIBUPB)

VALGRIND=valgrind --leak-check=full --error-exitcode=1 
test: tests
	@echo Running all tests under valgrind.
	@set -e  # Abort on error.
	@for test in $(TESTS); do \
	  if [ -x ./$$test ] ; then \
	    echo !!! $(VALGRIND) ./$$test; \
	    $(VALGRIND) ./$$test || exit 1; \
	  fi \
	done; \
	echo "All tests passed!"

tests/t.test_vs_proto2.googlemessage1 \
tests/t.test_vs_proto2.googlemessage2: \
    tests/test_vs_proto2.cc $(LIBUPB) benchmarks/google_messages.proto.pb \
    benchmarks/google_messages.pb.cc
	@echo CXX $< '(benchmarks::SpeedMessage1)'
	@$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o tests/t.test_vs_proto2.googlemessage1 $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage1\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"../benchmarks/google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"../benchmarks/google_message1.dat\" \
	  -DMESSAGE_CIDENT="benchmarks::SpeedMessage1" \
	  -DMESSAGE_HFILE=\"../benchmarks/google_messages.pb.h\" \
	  benchmarks/google_messages.pb.cc -lprotobuf -lpthread $(LIBUPB)
	@echo CXX $< '(benchmarks::SpeedMessage2)'
	@$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o tests/t.test_vs_proto2.googlemessage2 $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage2\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"../benchmarks/google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"../benchmarks/google_message2.dat\" \
	  -DMESSAGE_CIDENT="benchmarks::SpeedMessage2" \
	  -DMESSAGE_HFILE=\"../benchmarks/google_messages.pb.h\" \
	  benchmarks/google_messages.pb.cc -lprotobuf -lpthread $(LIBUPB)
tests/test_table: tests/test_table.cc
	@# Includes <hash_set> which is a deprecated header.
	@echo CXX $<
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -Wno-deprecated -o $@ $< $(LIBUPB)

tests/tests: src/libupb.a

# Tools
tools: tools/upbc
tools/upbc: $(LIBUPB)

# Benchmarks. ##################################################################

# Benchmarks
UPB_BENCHMARKS=benchmarks/b.parsestream_googlemessage1.upb_table \
               benchmarks/b.parsestream_googlemessage2.upb_table \
               benchmarks/b.parsetostruct_googlemessage1.upb_table_byref \
               benchmarks/b.parsetostruct_googlemessage2.upb_table_byref

BENCHMARKS=$(UPB_BENCHMARKS) \
           benchmarks/b.parsetostruct_googlemessage1.proto2_table \
           benchmarks/b.parsetostruct_googlemessage2.proto2_table \
           benchmarks/b.parsetostruct_googlemessage1.proto2_compiled \
           benchmarks/b.parsetostruct_googlemessage2.proto2_compiled
upb_benchmarks: $(UPB_BENCHMARKS)
benchmarks: $(BENCHMARKS)
benchmark:
	@rm -f benchmarks/results
	@rm -rf benchmarks/*.dSYM
	@for test in benchmarks/b.* ; do ./$$test ; done

benchmarks/google_messages.proto.pb: benchmarks/google_messages.proto
	@# TODO: replace with upbc.
	protoc benchmarks/google_messages.proto -obenchmarks/google_messages.proto.pb

benchmarks/google_messages.pb.cc: benchmarks/google_messages.proto
	protoc benchmarks/google_messages.proto --cpp_out=.

benchmarks/b.parsetostruct_googlemessage1.upb_table_byval \
benchmarks/b.parsetostruct_googlemessage1.upb_table_byref \
benchmarks/b.parsetostruct_googlemessage2.upb_table_byval \
benchmarks/b.parsetostruct_googlemessage2.upb_table_byref: \
    benchmarks/parsetostruct.upb_table.c $(LIBUPB) benchmarks/google_messages.proto.pb
	$(CC) $(CFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage1.upb_table_byval $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage1\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"google_message1.dat\" \
	  -DBYREF=false $(LIBUPB)
	$(CC) $(CFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage1.upb_table_byref $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage1\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"google_message1.dat\" \
	  -DBYREF=true $(LIBUPB)
	$(CC) $(CFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage2.upb_table_byval $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage2\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"google_message2.dat\" \
	  -DBYREF=false $(LIBUPB)
	$(CC) $(CFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage2.upb_table_byref $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage2\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"google_message2.dat\" \
	  -DBYREF=true $(LIBUPB)

benchmarks/b.parsestream_googlemessage1.upb_table \
benchmarks/b.parsestream_googlemessage2.upb_table: \
    benchmarks/parsestream.upb_table.c $(LIBUPB) benchmarks/google_messages.proto.pb
	$(CC) $(CFLAGS) $(CPPFLAGS) -o benchmarks/b.parsestream_googlemessage1.upb_table $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage1\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"google_message1.dat\" \
	  $(LIBUPB)
	$(CC) $(CFLAGS) $(CPPFLAGS) -o benchmarks/b.parsestream_googlemessage2.upb_table $< \
	  -DMESSAGE_NAME=\"benchmarks.SpeedMessage2\" \
	  -DMESSAGE_DESCRIPTOR_FILE=\"google_messages.proto.pb\" \
	  -DMESSAGE_FILE=\"google_message2.dat\" \
	  $(LIBUPB)

benchmarks/b.parsetostruct_googlemessage1.proto2_table \
benchmarks/b.parsetostruct_googlemessage2.proto2_table: \
    benchmarks/parsetostruct.proto2_table.cc benchmarks/google_messages.pb.cc
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage1.proto2_table $< \
	  -DMESSAGE_CIDENT="benchmarks::SpeedMessage1" \
	  -DMESSAGE_FILE=\"google_message1.dat\" \
	  -DMESSAGE_HFILE=\"google_messages.pb.h\" \
	  benchmarks/google_messages.pb.cc -lprotobuf -lpthread
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage2.proto2_table $< \
	  -DMESSAGE_CIDENT="benchmarks::SpeedMessage2" \
	  -DMESSAGE_FILE=\"google_message2.dat\" \
	  -DMESSAGE_HFILE=\"google_messages.pb.h\" \
	  benchmarks/google_messages.pb.cc -lprotobuf -lpthread

benchmarks/b.parsetostruct_googlemessage1.proto2_compiled \
benchmarks/b.parsetostruct_googlemessage2.proto2_compiled: \
    benchmarks/parsetostruct.proto2_compiled.cc \
    benchmarks/parsetostruct.proto2_table.cc benchmarks/google_messages.pb.cc
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage1.proto2_compiled $< \
	  -DMESSAGE_CIDENT="benchmarks::SpeedMessage1" \
	  -DMESSAGE_FILE=\"google_message1.dat\" \
	  -DMESSAGE_HFILE=\"google_messages.pb.h\" \
	  benchmarks/google_messages.pb.cc -lprotobuf -lpthread
	$(CXX) $(CXXFLAGS) $(CPPFLAGS) -o benchmarks/b.parsetostruct_googlemessage2.proto2_compiled $< \
	  -DMESSAGE_CIDENT="benchmarks::SpeedMessage2" \
	  -DMESSAGE_FILE=\"google_message2.dat\" \
	  -DMESSAGE_HFILE=\"google_messages.pb.h\" \
	  benchmarks/google_messages.pb.cc -lprotobuf -lpthread