start adding parquet support

lib/parquet/makefile

@@ -0,0 +1,61 @@
+
+PARQUETDIR := /home/mario/Desktop/Record_Evolution/parquet-cpp
+ARROWDIR := /home/mario/Desktop/Record_Evolution/arrow/cpp/src
+
+CPP := g++ -std=c++14
+OPT := 
+#-Wall -Woverflow -Wpedantic -Wextra -Waddress -Waligned-new -Walloc-zero
+
+prepare : collect_parquet modify_parquet collect_arrow modify_arrow
+
+collect_parquet :
+	cp -r $(PARQUETDIR)/src/parquet ./
+	cp $(PARQUETDIR)/examples/low-level-api/reader_writer.h ./
+	cp $(PARQUETDIR)/examples/low-level-api/reader-writer.cc ./
+	
+modify_parquet :
+	cp parquet/parquet_version.h.in parquet/parquet_version.h
+	sed -i 's/ReadableFileInterface/ReadWriteFileInterface/g' parquet/util/memory.h
+	sed -i 's/ReadableFileInterface/ReadWriteFileInterface/g' parquet/file_reader.h
+	sed -i 's/arrow::Codec/arrow::util::Codec/g' parquet/util/memory.h
+	sed -i 's/valid_bits_writer/valid_bits_offset/g' parquet/column_reader.h
+
+collect_arrow :
+	cp -r $(ARROWDIR)/arrow ./
+
+modify_arrow :
+	cp arrow/util/bit_util.h arrow/util/bit-util.h
+
+collect_test :
+	cp $(PARQUETDIR)/examples/low-level-api/reader-writer.cc ./
+
+subst :
+	sed -i 's/#include \"arrow\//\/\/#include \"arrow/g' parquet/properties.h
+	
+test :
+	$(CPP) $(OPT) -I$(PWD) reader-writer.cc
+
+clean :
+	rm -r parquet/ arrow/
+	rm reader-writer.cc reader_writer.h
+
+#------------------------------------------------------------------------------------#
+# only use more recent and up to date repository arrow.git
+
+# build arrow shared/static libraries
+build :
+	cd arrow/cpp
+	# cmake -LA  to show all options
+	cmake . -D ARROW_PARQUET=ON #ARROW_ARMV8_ARCH=armv8-a
+	make
+
+example :
+	cd arrow/cpp/examples/parquet/low-level-api/
+	g++ reader-writer.cc -I. -I../../../src/ -L../../../../cpp/build/release/ -larrow -lparquet
+
+# set environment variable LD_LIBRARY_PATH=../../../../cpp/build/release/ before launching executable
+
+
+
+
+