thomastrapp / datas-and-algos

Data Structures and Algorithms

datas-and-algos is free Software under the terms of the GNU General Public License Version 2. See COPYING for full license text.

Some data structures and algorithms I have implemented for fun, including unit tests.

Algorithms:

• al/mergesort.h
  Mergesort
• al/sort-and-count-inversions.h
  Inplace sort, returns the count of inversions
• al/strassen-matrix-multiply.h
  Matrix multiplication as invented by Strassen
• al/radixsort.h
  LSD Radixsort
• al/murmur.h
  MurmurHash 32bit/128bit as invented by Austin Appleby
• al/counting-sort.h
  Counting Sort
• al/boyer-moore-substring.h
  Boyer-Moore String Search

Data structures:

• ds/square-matrix.h
  A square matrix utilising strassen-matrix-multiply.h
• ds/stack.h
  A stack
• ds/binary-search-tree.h
  A binary search tree
• ds/fixed-hashtable.h
  A hashtable with fixed size. al::murmur_32 is used as a hash function.
• ds/priority-queue.h
  A priority queue based on std::make_heap, std::push_heap and std::pop_heap
• ds/bloom-filter.h
  Bloom filter, al::murmur_128 is used as a hash function.

Project structure:

• src/al/
  Algorithms
• src/ds/
  Data structures
• test/src/al/
  Unit tests for algorithms
• test/src/ds/
  Unit tests for data structures
• test/src/generic/
  Generic unit tests (rule-of-five.h, useful for default constructible objects that implement the rule of five)
• test/smhasher/
  SMHasher build to verify my MurmurHash (32bit, 128bit) implementation. Will automatically download SMHasher from Google Code.
• scripts/
  Helper scripts (build.sh, build-and-run-tests.sh, ...)
• scripts/static-analysis/
  Convenience wrappers for cppcheck and cpplint (run_cppcheck.sh, run_cpplint.sh)

Build unit tests:

Either use the convenience script in scripts/build-and-run-tests.sh or use cmake directly:

    cd test/build
    cmake ..
    make
    ./datas-and-algos-test

The unit testing framework (googletest) will automatically be downloaded and built by cmake.

Dependencies:

cmake >= 2.8.7, boost (boost::optional for ds::fixed_hashtable)