Update wavelet tree

Author: yingfeng

simhash-matching/util/.psm-helper.hpp.swp

@@ -10,3 +10,4 @@ find_package(Threads)
 
 add_subdirectory(src bin)
 
+add_subdirectory(test)

wavelet-tree/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Wavelet Tree
+
+## Task
+
+The Wavelet Tree is a succinct data structure to store strings in compressed space. It generalizes the Rank and Select operations defined on bitvectors to arbitrary alphabets. You could investigate by yourself on how wavelet tree works and what are rank/select operations. 
+
+The coding task is to finish a wavelet tree implementation: privide the `Quantile Range` interface which returns the K-th smallest value in the subarray. The function definition could be seen in the source code provided. Additionally, you need to provide unit test to guarantee the correctness of your implementation. 
+
+
+## Submission
+
+Submit a single compressed tar file called submission.tar.gz and send it to yingfeng dot zhang AT gmail dot com.
+
+## Rules
+
+- Please keep your solution private and not make it publicly available.

wavelet-tree/README.md

@@ -0,0 +1,40 @@
+cmake_minimum_required(VERSION 3.10)
+
+# Download and unpack googletest at configure time
+configure_file(./GTest.CMakeLists.txt googletest-download/CMakeLists.txt)
+execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
+        WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/test/googletest-download")
+execute_process(COMMAND "${CMAKE_COMMAND}" --build .
+        WORKING_DIRECTORY "${CMAKE_BINARY_DIR}/test/googletest-download")
+
+# Prevent GoogleTest from overriding our compiler/linker options
+# when building with Visual Studio
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+# Add googletest directly to our build. This adds
+# the following targets: gtest, gtest_main, gmock
+# and gmock_main
+add_subdirectory("${CMAKE_BINARY_DIR}/googletest-src"
+        "${CMAKE_BINARY_DIR}/googletest-build")
+
+# The gtest/gmock targets carry header search path
+# dependencies automatically when using CMake 2.8.11 or
+# later. Otherwise we have to add them here ourselves.
+if (CMAKE_VERSION VERSION_LESS 2.8.11)
+    include_directories("${gtest_SOURCE_DIR}/include"
+            "${gmock_SOURCE_DIR}/include")
+endif ()
+
+project(DBProgrammingCompetition)
+
+
+enable_testing()
+
+file(GLOB_RECURSE
+        TEST_SOURCE_FILES
+        CONFIGURE_DEPENDS
+        *.cpp
+        )
+
+add_executable(tester ${TEST_SOURCE_FILES})
+target_link_libraries(tester gtest gtest_main pthread)

wavelet-tree/test/CMakeLists.txt

@@ -0,0 +1,15 @@
+cmake_minimum_required(VERSION 3.10)
+
+project(googletest-download NONE)
+
+include(ExternalProject)
+ExternalProject_Add(googletest
+    GIT_REPOSITORY https://github.com/google/googletest.git
+    GIT_TAG 703bd9caab50b139428cea1aaff9974ebee5742e
+    SOURCE_DIR "${CMAKE_BINARY_DIR}/googletest-src"
+    BINARY_DIR "${CMAKE_BINARY_DIR}/googletest-build"
+    CONFIGURE_COMMAND ""
+    BUILD_COMMAND ""
+    INSTALL_COMMAND ""
+    TEST_COMMAND ""
+)

wavelet-tree/test/GTest.CMakeLists.txt

@@ -0,0 +1,7 @@
+#include "gtest/gtest.h"
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
+