Add xxhash

third_party/xxhash/tests/collisions/Makefile

@@ -0,0 +1,75 @@
+#  Brute force collision tester for 64-bit hashes
+#  Part of xxHash project
+#  Copyright (C) 2019-2021 Yann Collet
+#
+# GPL v2 License
+#
+# 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 of the License, 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.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+#  You can contact the author at:
+#  - xxHash homepage: https://www.xxhash.com
+#  - xxHash source repository: https://github.com/Cyan4973/xxHash
+#
+
+SRC_DIRS = ./ ../../ allcodecs/
+VPATH = $(SRC_DIRS)
+CPPFLAGS += $(addprefix -I ,$(SRC_DIRS))
+CFLAGS   += -Wall -Wextra -Wconversion \
+            -std=c99
+CXXFLAGS += -Wall -Wextra -Wconversion \
+            -std=c++11
+LDFLAGS  += -pthread
+TESTHASHES = 110000000
+
+HASH_SRC := $(sort $(wildcard allcodecs/*.c allcodecs/*.cc))
+HASH_OBJ := $(patsubst %.c,%.o,$(HASH_SRC))
+
+
+.PHONY: default
+default: release
+
+.PHONY: all
+all: release
+
+collisionsTest: main.o pool.o threading.o sort.o $(HASH_OBJ)
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $^ $(LDFLAGS) -o $@
+
+main.o: hashes.h xxhash.h
+
+release: CXXFLAGS += -O3
+release: CFLAGS += -O3
+release: collisionsTest
+
+debug: CXXFLAGS += -g3 -O0 -DDEBUG
+debug: CFLAGS += -g3 -O0 -DDEBUG
+debug: collisionsTest
+
+.PHONY: check
+check: test
+
+.PHONY: test
+test: debug
+	@echo ""
+	@echo "## $(TESTHASHES) hashes with original and 0 threads"
+	@time ./collisionsTest --nbh=$(TESTHASHES)
+	@echo ""
+	@echo "## $(TESTHASHES) hashes with original and 4 threads"
+	@time ./collisionsTest --nbh=$(TESTHASHES) --threadlog=2
+	@echo ""
+
+.PHONY: clean
+clean:
+	$(RM) *.o allcodecs/*.o
+	$(RM) collisionsTest