🔗 Common Data Structures and Algorithms

Related tags

Data Structures list tree algorithm data-structure algorithms octree hash binary-search-tree red-black-tree rbtree hash-table balanced-search-trees search-trees libds algorithms-datastructures forward-list
Overview

🔗 Data Structures and Algorithms

Build Status Build status Coverage Status Codacy Badge

This library provides common data structures. It will also provide some data structures which needed in render or game engines. In the future I'll try to optimize memmory access.

There may multiple way to implement a data structure but I tried to implement best way to do that. For instance Red-Black Trees are only implemented as top down insertion/deletion to make it faster.

There are some convenient constructors for common use cases. For instance rb_newtree_str() creates new rb-tree that uses strings as key, rb_newtree_ptr() creates new rb-tree that uses pointers as key. When you use these functions to alloc a data structure then you don't need to provide compare or print functions.

This library prodives allocator api so you can override default allocator.

Usage

#include <ds/rb.h> // Red-Black Tree

int
main(int argc, const char * argv[]) {
  RBTree *tree;
  /* ... */

  /* use string keys */
  tree = rb_newtree_str();

  rb_insert(tree, "key", value);

  /* ... */
  value = rb_find(tree, "key");

  rb_destroy(tree);
}

Todo

  • rbtree
    • top-down insertion
    • top-down deletion
  • forward-list
    • forward-list-separate (reduces FList struct)
  • hash-table
    • builtin hash functions e.g. djb2
    • resizing hash table
  • quick sort implementation for float, double, i32, u32, i64, u64
  • queue (working on this)
  • stack
  • binary heap / priority queue
  • dynamic array
  • octree
  • quadtree
  • b-tree

Build

Unix (Autotools)

$ sh autogen.sh
$ ./configure
$ make
$ make check # [Optional]
$ [sudo] make install # [Optional]

Windows (MSBuild)

Windows related build, project files are located in win folder, make sure that you are inside in the libds/win folder. Code Analysis are enabled, it may take awhile to finish build

$ cd win
$ .\build.bat

if msbuild didn't work then you can try to build it with devenv:

$ devenv libds.sln /Build Release

License

MIT. check the LICENSE file

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Comments
  • Red Black Tree: Provide extra function to override compare(cmp) function

    Red Black Tree: Provide extra function to override compare(cmp) function

    New functions:

    void*   rb_find_by(RBTree * __restrict tree, void * __restrict key, const DsCmpFn cmp);
RBNode* rb_find_node_by(RBTree * __restrict tree, void * __restrict key, const DsCmpFn cmp);

    Custom compare can be used for getting items. For instance you can compare null terminated string with non-null terminated string by providing custom compare to rb_find_by().

    • previous rb_find() and rb_find_node() now uses rb_find_node_by() to reduce pointer dereferencing (hope there will no bugs here)
    opened by recp 0
  • quick sort implementation

    quick sort implementation

    Quick sort implementation for float, double, int32, uint32, int64 and uint64.

    The implementation is specific to primitive types so it must be faster than builtin qsort. Because

    • it eliminates compare function
    • it eliminates size parameter

    Some features:

    • clean interface
    • it allows both ASC and DESC ordering
    • it provides a swap item callback so if you have two or more arrays and you can swap elements in other arrays while the array is being sorted.
    • it uses Hoare partition scheme

    in the future sorting order data structures especially linked lists may be supported.

    opened by recp 0
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