Repository: jarun/dslib
Branch: master
Commit: aacfe9784dd3
Files: 27
Total size: 96.8 KB
Directory structure:
gitextract_kexsks7t/
├── .github/
│ └── FUNDING.yml
├── CMakeLists.txt
├── LICENSE
├── Makefile
├── README.md
├── apilist.txt
├── include/
│ ├── avl.h
│ ├── common.h
│ ├── dlist.h
│ ├── log.h
│ ├── queue.h
│ ├── stack.h
│ └── tree.h
├── src/
│ ├── avl.c
│ ├── common.c
│ ├── dlist.c
│ ├── log.c
│ ├── queue.c
│ ├── stack.c
│ └── tree.c
└── test/
├── Makefile
├── avl_Thread_Safe_Test.c
├── test_avl_1.c
├── test_bst_1.c
├── test_dlist_1.c
├── test_queue_1.c
└── test_stack_1.c
================================================
FILE CONTENTS
================================================
================================================
FILE: .github/FUNDING.yml
================================================
# These are supported funding model platforms
github: jarun
================================================
FILE: CMakeLists.txt
================================================
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
cmake_minimum_required(VERSION 3.12)
project(dslib)
file(GLOB files CONFIGURE_DEPENDS include/*.h src/*.c)
add_library(ds SHARED ${files})
find_package(Threads REQUIRED)
target_link_libraries(ds PUBLIC Threads::Threads)
target_include_directories(ds
PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
$<INSTALL_INTERFACE:include/ds>
)
if (UNIX)
target_link_libraries(ds PRIVATE -Wl,-undefined,dynamic_lookup)
endif()
file(GLOB files CONFIGURE_DEPENDS test/*.c )
foreach(file IN LISTS files)
get_filename_component(test_name ${file} NAME_WE)
add_executable(${test_name} ${file})
target_link_libraries(${test_name} PRIVATE ds)
add_test(${test_name} ${test_name})
endforeach()
include(CTest)
================================================
FILE: LICENSE
================================================
GNU GENERAL PUBLIC LICENSE
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To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
{one line to give the program's name and a brief idea of what it does.}
Copyright (C) {year} {name of author}
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 3 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, see <http://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
{project} Copyright (C) {year} {fullname}
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.
================================================
FILE: Makefile
================================================
CC = gcc
CFLAGS = -Wall -Wextra -Werror -O3 -fPIC $(INCLUDE)
SRC = $(wildcard src/*.c)
OBJS = $(SRC:%.c=%.o)
INCLUDE = -Iinclude
TARGET = libds.so.1.0
BINDIR = ./bin
HEADERDIR = /usr/include/dslib
DESTDIR = /usr/lib
all: $(TARGET)
$(TARGET): $(OBJS)
mkdir -p $(BINDIR)
$(CC) $(CFLAGS) -shared -Wl,-soname,libds.so.1 -o $(BINDIR)/$(TARGET) $(OBJS)
strip $(BINDIR)/$(TARGET)
.PHONY: test clean
test:
cd test && $(MAKE)
clean:
rm -f $(OBJS) $(BINDIR)/$(TARGET)
rm -rf $(BINDIR)
# clean test files too
cd test && $(MAKE) clean
distclean: clean
rm -f *~
install: $(TARGET)
install -m755 -d $(HEADERDIR)
install -m644 -t $(HEADERDIR) include/*.h
install -o root -m 644 $(BINDIR)/$(TARGET) $(DESTDIR)/
ln -sf $(DESTDIR)/$(TARGET) $(DESTDIR)/libds.so.1
ln -sf $(DESTDIR)/libds.so.1 $(DESTDIR)/libds.so
uninstall:
rm -rf $(HEADERDIR)
rm -f $(DESTDIR)/libds.so $(DESTDIR)/libds.so.1 $(DESTDIR)/$(TARGET)
================================================
FILE: README.md
================================================
# dslib
`dslib` is a library of cohesive data structures. The goal of `dslib` is to demonstrate how complex data structures (and related algorithms) can be developed by reusing simpler ones. In general, textbooks come with numerous unrelated examples, each relevant to a specific data structure. `dslib`, on the other hand, grows by building on the elementary data structures.
The core component is a circular doubly linked list. Library-internal data structures are dynamically (de)allocated.
Most of the code conforms to the Linux kernel coding standards (verified against *checkpatch.pl*), other than a few unavoidable instances.
`dslib` is an academic library. However, we'll be glad if someone finds any other application of it.
<p align="center">
<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=RMLTQ76JSXJ4Q"><img src="https://img.shields.io/badge/PayPal-donate-1eb0fc.svg" alt="Donate via PayPal!" /></a>
</p>
### Table of Contents
- [Building blocks](#building-blocks)
- [APIs](#apis)
- [Thread-safety](#thread-safety)
- [Compilation](#compilation)
- [Testing](#testing)
- [Developers](#developers)
- [Contributions](#contributions)
### Building blocks
| DS | Description |
| --- | --- |
| dlist | Circular doubly linked list. Node has next, prev and data (`void *`, caller (de)allocates) pointers. |
| queue | Builds on top of dlist. Each element is a dlist node pointing to the value inserted in the queue. |
| stack | Builds on top of dlist. Each element is a dlist node pointing to the value pushed in the stack. |
| tree | A binary search tree, stores integers. |
| AVL | An AVL tree implementation, stores integers. |
| BFS | Iterative Breadth-first search for tree and AVL implemented using the queue. |
| DFS | Iterative Depth-first search for tree implemented using the stack. |
There are test cases for each DS. Though not very organized, they provide an insight into the usage of `dslib`.
### APIs
A complete list of APIs can be found in [apilist.txt](https://github.com/jarun/dslib/blob/master/apilist.txt). Most of the APIs are iterative.
The following 2 APIs are recursive and the iterative implementations are left as an exercise:
```
bool delete_tree_node(tree_pp head, int val);
bool delete_avl_node(avl_pp head, int val);
```
### Thread-safety
Currently the Thread-Safe mode is implemented only for AVL. The lock functions are in common.h and common.c and it's easy to extend thread-safety in other structures.
### Compilation
The following compilation steps are tested on Ubuntu 14.04.4 x86_64:
$ git clone https://github.com/jarun/dslib/
$ cd dslib
$ make
To install `dslib`, run:
$ sudo make install
To remove `dslib` from your system, run:
$ sudo make uninstall
Clean up (cleans test executables too):
$ make clean
### Testing
Make sure `dslib` is installed. To compile test cases under `test` subdirectory:
$ sudo make install
$ make test
Only informative logs are enabled. For DEBUG logs, set:
int current_log_level = DEBUG;
in the source test file.
### Developers
- [Arun Prakash Jana](https://github.com/jarun) (Copyright © 2015)
- [Ananya Jana](https://github.com/ananyajana)
### Contributions
Contributions are welcome! We would love to see more data structures and APIs added to `dslib`.
================================================
FILE: apilist.txt
================================================
########################################
1. Circular Doubly Linked List [dlist.h]
########################################
int add_head_dlist(dlist_pp head, dlist_p node);
void *get_head_dlist(dlist_pp head);
void *get_tail_dlist(dlist_pp head);
int delete_head_dlist(dlist_pp head);
int delete_tail_dlist(dlist_pp head);
int destroy_dlist(dlist_pp head);
int count_nodes_dlist(dlist_pp head);
##################
2. Queue [queue.h]
##################
queue_p get_queue(void);
bool enqueue(queue_p queue, void *val);
void *dequeue(queue_p queue);
bool isQueueEmpty(queue_p queue);
bool destroy_queue(queue_p queue);
##################
3. Stack [stack.h]
##################
stack_p get_stack(void);
bool push(stack_p stack, void *val);
void *pop(stack_p stack);
bool isStackEmpty(stack_p stack);
bool destroy_stack(stack_p stack);
##############################
4. Binary Search Tree [tree.h]
##############################
tree_pp generate_tree(int *arr, int len);
tree_pp init_tree(void);
bool insert_tree_node(tree_pp head, int val);
bool delete_tree_node(tree_pp head, int val);
int destroy_tree(tree_pp head);
int print_tree(tree_p root);
int search_BFS(tree_pp root, int val, bool stop);
int search_DFS(tree_pp root, int val, bool stop);
###################
5. AVL Tree [avl.h]
###################
avl_pp generate_avl(int *arr, int len);
avl_pp init_avl(void);
bool insert_avl_node(avl_pp head, int val);
bool delete_avl_node(avl_pp head, int val);
int destroy_avl(avl_pp head);
int print_avl(avl_p root, avl_p parent);
int search_BFS_avl(avl_pp root, int val, bool stop);
================================================
FILE: include/avl.h
================================================
/*
* AVL Tree abstraction
* Ref: https://en.wikipedia.org/wiki/AVL_tree
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "common.h"
#pragma once
typedef struct avl {
int keyNode;
int data;
struct avl *left;
struct avl *right;
int height;
} avl_t, *avl_p, **avl_pp;
/* Generate AVL tree from an array of input values */
avl_pp generate_avl(int *arr, int len);
/* Initialize an AVL tree */
avl_pp init_avl(void);
/* Insert a node in AVL tree */
bool insert_avl_node(avl_pp head, int key, int data);
/* Delete a node from AVL tree */
bool delete_avl_node(avl_pp head, int key);
/* Destroy the tree */
int destroy_avl(avl_pp head);
// avl will be destroy isn't necessary sincronize it (is better not destroy)
/* Print a tree in preorder */
int print_avl(avl_p root, avl_p parent);
/* Traverse tree in BFS to find a given value */
int search_BFS_avl(avl_pp root, int key, bool stop);
/*=======================================================*/
/* Library ThreadSafe APIs start here */
/*=======================================================*/
//The struct is a generalization of avl_pp, to include for every tree one semaphore
typedef struct avlThSafe {
avl_pp avlRoot;
int semId;
} avl_pp_S;
/* Generate AVL tree from an array of input values */
avl_pp_S generate_avl_S(int *arr, int len);
/* Initialize an AVL tree */
avl_pp_S init_avl_S(void);
/* Insert a node in AVL tree */
bool insert_avl_node_S(avl_pp_S head, int key, int data);
/* Delete a node from AVL tree */
bool delete_avl_node_S(avl_pp_S head, int key);
/* Destroy the tree */
/** [][] avl will be destroy isn't necessary sincronize it (is better not destroy) **/
/* Print a tree in preorder, start by root */
int print_avl_S(avl_pp_S root);
/* Traverse tree in BFS to find a given value */
int search_BFS_avl_S(avl_pp_S root, int key, bool stop);
================================================
FILE: include/common.h
================================================
/*
* Common header file for dslib
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "log.h"
#pragma once
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <errno.h>
/* Introduce boolean type */
#define TRUE 1
#define FALSE !TRUE
#define LEFT 0
#define RIGHT 1
typedef unsigned char bool;
/*=======================================================*/
/* Syncronize for ThreadSafe APIs start here */
/*=======================================================*/
enum semName {wantWrite=0,readWorking=1,writeWorking=2};
int semInit();
/*#######################################*/
/* Lock/unlock for writers function */
/*#######################################*/
int lockWriteSem(int semId);
int unlockWriteSem(int semId);
/*#######################################*/
/* Lock/unlock for readers function */
/*#######################################*/
int lockReadSem(int semId);
int unlockReadSem(int semId);
//semInfo print
void semInfo(int semId);
/*
The scheme of synchronization is easy: (i use system 5)
There are 3 semaphore: wantWrite,readWorking and writeWorking (last like mutex, and the first two are counter in fact)
READER:
If more than one read-funx(like search) need to read data it will be wait until wantWrite!=0.
ATOMICALLY it add at readWorking +1, to start only if no one write are current at working.
After, ALL READER-funx can be work and finally decrease readWorking counter (this in concurrency).
WRITER:
to start it add wantWrite +1, (to signal at new reader, it si necessary to waiting)
after the writers WAIT until all reader just at work finish.
then, writer-funx can lock writeWorking to write one at time (is a mutex),
enter in critic section, and at the end unlock writeWorking.
Finally decrement wantWrite -1, and finish.
*/
================================================
FILE: include/dlist.h
================================================
/*
* Circular Doubly Linked List abstraction
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "common.h"
#pragma once
/* Circular Doubly Linked List ADT */
typedef struct dlist {
void *data;
struct dlist *next;
struct dlist *prev;
} dlist_t, *dlist_p, **dlist_pp;
/* Add node at head of list */
int add_head_dlist(dlist_pp head, dlist_p node);
/* Get the head of list */
void *get_head_dlist(dlist_pp head);
/* Get the tail of list */
void *get_tail_dlist(dlist_pp head);
/* Delete the head of list */
int delete_head_dlist(dlist_pp head);
/* Delete the tail of list */
int delete_tail_dlist(dlist_pp head);
/* Clean up list */
int destroy_dlist(dlist_pp head);
/* Count total nodes in list */
int count_nodes_dlist(dlist_pp head);
================================================
FILE: include/log.h
================================================
/*
* A modular, level based log file implementation
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2014 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <stdio.h>
#include <stdarg.h>
#define ERROR 0
#define INFO 1
#define DEBUG 2
#define log(level, format, ...) \
debug_log(__FILE__, __func__, __LINE__, \
level, format, ##__VA_ARGS__)
void debug_log(const char *file,
const char *func,
int line,
int level,
const char *format,
...) __attribute__((__format__(printf, 5, 6)));
================================================
FILE: include/queue.h
================================================
/*
* Queue abstraction
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dlist.h"
#pragma once
/* Queue ADT using a circular doubly linked list */
typedef struct {
dlist_pp head;
} queue_t, *queue_p;
/* Create a new Queue */
queue_p get_queue(void);
/* Add a value to Queue */
bool enqueue(queue_p queue, void *val);
/* Remove a value from Queue */
void *dequeue(queue_p queue);
/* Check if the Queue is empty */
bool isQueueEmpty(queue_p queue);
/* Clean up Queue */
bool destroy_queue(queue_p queue);
================================================
FILE: include/stack.h
================================================
/*
* Stack abstraction
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dlist.h"
#pragma once
/* Stack ADT using a circular doubly linked list */
typedef struct {
dlist_pp head;
} stack_t, *stack_p;
/* Create a new Stack */
stack_p get_stack(void);
/* Push a value to Stack */
bool push(stack_p stack, void *val);
/* Pop a value from Stack */
void *pop(stack_p stack);
/* Check if a stack is empty */
bool isStackEmpty(stack_p stack);
/* Clean up Stack */
bool destroy_stack(stack_p stack);
================================================
FILE: include/tree.h
================================================
/*
* Binary Search Tree abstraction
*
* Author: Ananya Jana <ananya.jana@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "common.h"
#pragma once
typedef struct tree {
int data;
struct tree *left;
struct tree *right;
} tree_t, *tree_p, **tree_pp;
/* Generate tree from an array of input values */
tree_pp generate_tree(int *arr, int len);
/* Initalize a tree */
tree_pp init_tree(void);
/* Insert a node in tree */
bool insert_tree_node(tree_pp head, int val);
/* Delete a node from tree */
bool delete_tree_node(tree_pp head, int val);
/* Destroy the tree */
int destroy_tree(tree_pp head);
/* Print a tree in preorder */
int print_tree(tree_p root);
/* Traverse tree in BFS to find a given value */
bool search_BFS(tree_pp root, int val, bool stop);
/* Traverse tree in DFS to find a given value */
bool search_DFS(tree_pp root, int val, bool stop);
================================================
FILE: src/avl.c
================================================
/*
* AVL Tree implementation
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stack.h"
#include "queue.h"
#include "avl.h"
/*
* Struct to hold an AVL node and traversal
* direction (left or right) to child node
*/
typedef struct {
avl_p node;
int direction;
} nodedata, *nodedata_p;
/*
* Calculate the height of a node in AVL tree
*/
int height(avl_p node)
{
int lh, rh;
if (!node)
return 0;
node->left == NULL ? lh = 0 : (lh = 1 + node->left->height);
node->right == NULL ? rh = 0 : (rh = 1 + node->right->height);
return (lh >= rh ? lh : rh);
}
/*
* Calculate balance factor of subtree
*/
int BalanceFactor(avl_p node)
{
int lh, rh;
if (!node)
return 0;
node->left == NULL ? lh = 0 : (lh = 1 + node->left->height);
node->right == NULL ? rh = 0 : (rh = 1 + node->right->height);
return (lh - rh);
}
/*
* Rotate a node towards right
*/
avl_p RotateRight(avl_p node)
{
avl_p left_node = node->left;
node->left = left_node->right;
left_node->right = node;
node->height = height(node);
left_node->height = height(left_node);
return left_node;
}
/*
* Rotate a node towards left
*/
avl_p RotateLeft(avl_p node)
{
avl_p right_node = node->right;
node->right = right_node->left;
right_node->left = node;
node->height = height(node);
right_node->height = height(right_node);
return right_node;
}
/*
* Adjust a right right skewed subtree
*/
avl_p RightRight(avl_p node)
{
return RotateLeft(node);
}
/*
* Adjust a left left skewed subtree
*/
avl_p LeftLeft(avl_p node)
{
return RotateRight(node);
}
/*
* Adjust a left right skewed subtree
*/
avl_p LeftRight(avl_p node)
{
node->left = RotateLeft(node->left);
return RotateRight(node);
}
/*
* Adjust a right left skewed subtree
*/
avl_p RightLeft(avl_p node)
{
node->right = RotateRight(node->right);
return RotateLeft(node);
}
/*
* Rebalance subtree tmp based on balance factor & skew
*/
bool rebalance(stack_p stack, avl_pp head, avl_p tmp, int data)
{
nodedata_p p = NULL;
int direction;
avl_p parent = NULL;
bool modified = TRUE;
if (BalanceFactor(tmp) == -2) { /* Right subtree longer */
p = pop(stack);
if (p) {
parent = p->node;
direction = p->direction;
}
if (data >= tmp->right->keyNode) { /* Right-right skewed subtree */
if (p)
direction == RIGHT
? (parent->right = RightRight(tmp))
: (parent->left = RightRight(tmp));
else /* If p is NULL, this is the topmost node, update *head */
*head = RightRight(tmp);
} else { /* Right-left skewed subtree */
if (p)
direction == RIGHT
? (parent->right = RightLeft(tmp))
: (parent->left = RightLeft(tmp));
else
*head = RightLeft(tmp);
}
} else if (BalanceFactor(tmp) == 2) { /* Left subtree longer */
p = pop(stack);
if (p) {
parent = p->node;
direction = p->direction;
}
/* If p is NULL, this is the topmost node, update *head */
if (data < tmp->left->keyNode) { /* Left-left skewed subtree */
if (p)
direction == RIGHT
? (parent->right = LeftLeft(tmp))
: (parent->left = LeftLeft(tmp));
else
*head = LeftLeft(tmp);
} else { /* Left-right skewed subtree */
if (p)
direction == RIGHT
? (parent->right = LeftRight(tmp))
: (parent->left = LeftRight(tmp));
else
*head = LeftRight(tmp);
}
} else
modified = FALSE;
if (p)
free(p);
tmp->height = height(tmp);
return modified;
}
/*
* Delete all nodes of an AVL tree
*/
int delete_avl_nodes(avl_p root)
{
int count = 0;
if (!root) {
log(ERROR, "root invalid.\n");
return 0;
}
if (root->left)
count += delete_avl_nodes(root->left);
if (root->right)
count += delete_avl_nodes(root->right);
free(root);
root = NULL;
return ++count;
}
/*=======================================================*/
/* Library exposed APIs start here */
/*=======================================================*/
/*
* Generate an AVL tree iteratively from an array of integers
*/
avl_pp generate_avl(int *arr, int len)
{
avl_pp head = NULL;
if (!arr || !len) {
log(ERROR, "Invalid array.\n");
return NULL;
}
head = init_avl();
for (int i = 0; i < len; i++) {
if (insert_avl_node(head, i, arr[i]) == FALSE) {
log(ERROR, "Insertion failed.\n");
destroy_avl(head);
return NULL;
}
}
return head;
}
/*
* Initialize an AVL tree with empty root node
*/
avl_pp init_avl(void)
{
avl_pp head = calloc(1, sizeof(avl_p));
*head = NULL;
return head;
}
/*
* Insert a new node into AVL tree
*/
bool insert_avl_node(avl_pp head, int key, int data)
{
avl_p root = NULL;
nodedata_p p = NULL;
nodedata_p n = NULL;
bool modified;
if (!head) {
log(ERROR, "Initialize AVL tree first\n");
return FALSE;
}
root = *head;
if (!root) {
root = (avl_p) calloc(1, sizeof(avl_t));
root->keyNode = key;
root->data = data;
*head = root;
return TRUE;
}
/* Stack to rebalance each subtree bottom-up after insertion */
stack_p stack = get_stack();
//until current node isn't Null
while (root) {
//if keyNod < of key to add, go left of tree
if (key < root->keyNode) {
//if left null, add node as left son
if (!root->left) {
/* Create an AVL node for new value */
root->left = calloc(1, sizeof(avl_t));
root->left->keyNode = key;
root->left->data = data;
root->height = height(root);
modified = FALSE;
/* Unwind stack & rebalance nodes (only once) */
while ((p = pop(stack)) != NULL) {
/* One rebalance for one insertion */
if (!modified)
modified = rebalance(stack, head, p->node, key);
free(p);
}
break;
}
/* Push the parent node and traversal
direction in stack as we traverse down */
n = malloc(sizeof(nodedata));
n->node = root;
n->direction = LEFT;
push(stack, n);
/* Traverse further left */
root = root->left;
} else { //key to add is >= then current key node
//if right son null add son on it
if (!root->right) {
root->right = calloc(1, sizeof(avl_t));
root->right->keyNode = key;
root->right->data = data;
root->height = height(root);
modified = FALSE;
while ((p = pop(stack)) != NULL) {
if (!modified)
modified = rebalance(stack, head, p->node, key);
free(p);
}
break;
}
n = malloc(sizeof(nodedata));
n->node = root;
n->direction = RIGHT;
push(stack, n);
root = root->right;
}
}
destroy_stack(stack);
return TRUE;
}
/*
* Delete a node from AVL tree
* Recursive method
*/
bool delete_avl_node(avl_pp head, int key)
{
avl_p node;
avl_p tmp;
if (!head) {
log(ERROR, "Initialize AVL tree first\n");
return FALSE;
}
node = *head;
if (!node) {
log(ERROR, "No nodes to delete\n");
return FALSE;
}
if (key > node->keyNode) {
if (!node->right)
return FALSE;
if (delete_avl_node(&(node->right), key) == FALSE)
return FALSE;
if (BalanceFactor(node) == 2) {
if (BalanceFactor(node->left) >= 0)
node = LeftLeft(node);
else
node = LeftRight(node);
}
} else if (key < node->keyNode) {
if (!node->left)
return FALSE;
if (delete_avl_node(&(node->left), key) == FALSE)
return FALSE;
if (BalanceFactor(node) == -2) {
if (BalanceFactor(node->right) <= 0)
node = RightRight(node);
else
node = RightLeft(node);
}
} else { /* Match found */
if (node->right) { /* Delete the inorder successor */
tmp = node->right;
while (tmp->left)
tmp = tmp->left;
node->keyNode = tmp->keyNode;
if (delete_avl_node(&(node->right), tmp->keyNode) == FALSE)
return FALSE;
if (BalanceFactor(node) == 2) {
if (BalanceFactor(node->left) >= 0)
node = LeftLeft(node);
else
node = LeftRight(node);
}
} else {
*head = node->left;
free(node);
return TRUE;
}
}
node->height = height(node);
*head = node;
return TRUE;
}
/*
* Destroy an AVL tree
*/
int destroy_avl(avl_pp head)
{
int count = 0;
if (!head) {
log(ERROR, "head invalid.\n");
return -1;
}
count = delete_avl_nodes(*head);
free(head);
head = NULL;
return count;
}
/*
* Print the values in an AVL tree in preorder
*/
int print_avl(avl_p root, avl_p parent)
{
int count = 0;
if (!root) {
log(ERROR, "root invalid.\n");
return -1;
}
++count;
/* Print key:data values in the node */
log(INFO, "key:data=%6d:%d, parent key=%6d\n", root->keyNode, root->data, parent->keyNode);
if (root->left) {
log(INFO, "LEFT.\n");
count += print_avl(root->left, root);
}
if (root->right) {
log(INFO, "RIGHT.\n");
count += print_avl(root->right, root);
}
return count;
}
/*
* AVL Tree Breadth First Search implementation
* Implements iterative search using a Queue
* Checks for a match before adding a node to Queue
*
* PARAMS
* ------
* root: pointer to the root node pointer of an AVL tree
* val : value to search
* stop: TRUE: stop if Key is found and return val.
* FALSE: continue visiting of tree, print debug info and return the val of the last key.
*/
int search_BFS_avl(avl_pp root, int key, bool stop)
{
//return -1 is error
//return -2 is not Found
avl_p node = NULL;
queue_p queue = NULL;
int ret = -2; //start with no found
if (!root || !*root) {
log(ERROR, "avl tree or root node is NULL!\n");
return -2; //because avl is empty so key is not found
}
/* Check for a match in root node */
node = *root;
if (node->keyNode == key) {
if (!stop)
log(INFO, "FOUND %d\n", key);
if (stop)
ret = node->data;
else
ret = node->data;
}
queue = get_queue();
/* Add root node to Queue */
if (!enqueue(queue, *root)) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return -1;
}
/* Loop through all nodes in the Queue */
while ((node = dequeue(queue)) != NULL) {
if (!stop)
log(INFO, "tracking...\n");
/* Process left child of node */
if (node->left) {
if (node->left->keyNode == key) {
if (stop)
ret = node->left->data;
else {
log(INFO, "FOUND %d\n", key);
ret = node->right->data;
}
break;
}
/* Add left child to Queue */
if (!enqueue(queue, node->left)) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return -1;
}
}
/* Process right child of node */
if (node->right) {
if (node->right->keyNode == key) {
if (stop)
ret = node->right->data;
else {
log(INFO, "FOUND %d\n", key);
ret = node->left->data;
}
break;
}
/* Add right child to Queue */
if (!enqueue(queue, node->right)) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return -1;
}
}
}
/* Report if no match was found */
destroy_queue(queue);
return ret;
}
/*=======================================================*/
/* Library ThreadSafe APIs start here */
/*=======================================================*/
/*
* Generate an AVL tree iteratively from an array of integers
*/
avl_pp_S generate_avl_S(int *arr, int len)
{
int i = 0;
avl_pp_S head;
if (!arr || !len) {
log(ERROR, "Invalid array.\n");
head.avlRoot = NULL;
return head;
}
head = init_avl_S();
for (; i < len; i++) {
if (insert_avl_node(head.avlRoot, i, arr[i]) == FALSE) {
log(ERROR, "Insertion failed.\n");
destroy_avl(head.avlRoot);
head.avlRoot = NULL;
return head;
}
}
return head;
}
avl_pp_S init_avl_S(void)
{
avl_pp_S head;
head.semId = semInit();
if (head.semId == -1) {
perror("Sem Setup failed");
head.avlRoot = NULL;
return head;
}
head.avlRoot = calloc(1, sizeof(avl_p));
*head.avlRoot = NULL;
return head;
}
bool insert_avl_node_S(avl_pp_S head, int key, int data)
{
bool ret;
lockWriteSem(head.semId);
ret = insert_avl_node(head.avlRoot, key, data);
unlockWriteSem(head.semId);
return ret;
}
bool delete_avl_node_S(avl_pp_S head, int key)
{
bool ret;
lockWriteSem(head.semId);
ret = delete_avl_node(head.avlRoot, key);
unlockWriteSem(head.semId);
return ret;
}
int search_BFS_avl_S(avl_pp_S root, int key, bool stop)
{
int ret;
lockReadSem(root.semId);
ret = search_BFS_avl(root.avlRoot, key, stop);
unlockReadSem(root.semId);
return ret;
}
int print_avl_S(avl_pp_S root)
{
int ret;
lockReadSem(root.semId);
ret = print_avl(*root.avlRoot, *root.avlRoot);
unlockReadSem(root.semId);
return ret;
}
================================================
FILE: src/common.c
================================================
//
// Created by alfylinux on 21/10/18.
//
#include "common.h"
int semInit()
{
int semId = semget(IPC_PRIVATE,3, IPC_CREAT | IPC_EXCL | 0666);
if (semId == -1)
{
perror("Create Sem-s take error:");
return -1;
}
//enum semName {wantWrite=0,readWorking=1,writeWorking=2}; number is Id of sem
unsigned short semStartVal[3] = {0, 0, 1};
//setup 3 semaphore in system5
if (semctl(semId, 0, SETALL, semStartVal))
{
perror("set Sem take error:");
return -1;
}
printf("SEMAFORO Created\n");
semInfo(semId);
return semId;
}
int lockWriteSem(int semId)
{
struct sembuf sem;
sem.sem_flg = SEM_UNDO;
//increase counter wantWrite
sem.sem_num = wantWrite;
sem.sem_op = +1;
SEM_wantWrite:
if (semop(semId, &sem, 1))
{
switch (errno)
{
case EINTR:
goto SEM_wantWrite;
break;
default:
perror("increase wantWrite semCount error:");
return -1;
break;
}
}
//wait until =0 readerWork
sem.sem_num = readWorking;
sem.sem_op = 0;
SEM_waitReaders:
if (semop(semId, &sem, 1))
{
switch (errno)
{
case EINTR:
goto SEM_waitReaders;
break;
default:
perror("wait until 0 readWorking take error:");
return -1;
break;
}
}
//wait noThread already work
sem.sem_num = writeWorking;
sem.sem_op = -1;
SEM_writeWorking:
if (semop(semId, &sem, 1))
{
switch (errno)
{
case EINTR:
goto SEM_writeWorking;
break;
default:
perror("lock writeWorking error:");
return -1;
break;
}
}
return 0;
}
int unlockWriteSem(int semId)
{
struct sembuf sem;
sem.sem_flg = SEM_UNDO;
//signal finish writing work
sem.sem_num = writeWorking;
sem.sem_op = 1;
SEM_writeWorking:
if (semop(semId, &sem, 1))
{
switch (errno)
{
case EINTR:
goto SEM_writeWorking;
break;
default:
perror("unlock writeWorking error:");
return -1;
break;
}
}
//reduce counter of wantWrite
sem.sem_num = wantWrite;
sem.sem_op = -1;
SEM_wantWrite:
if (semop(semId, &sem, 1))
{
switch (errno)
{
case EINTR:
goto SEM_wantWrite;
break;
default:
perror("decrease wantWrite semCount error:");
return -1;
break;
}
}
return 0;
}
int lockReadSem(int semId)
{
struct sembuf sem[2];
sem[0].sem_num = wantWrite;
sem[0].sem_flg = SEM_UNDO;
sem[1].sem_num = readWorking;
sem[1].sem_flg = SEM_UNDO;
//to be sure not concurrency problem, read Thread must be wait until no writes works, and instantly increase his counter
sem[0].sem_op = 0;
sem[1].sem_op = +1;
SEM_wantWrite_readWorking:
if (semop(semId, sem, 2))
{
switch (errno)
{
case EINTR:
goto SEM_wantWrite_readWorking;
break;
default:
perror("lockRead sem take error:");
return -1;
break;
}
}
return 0;
}
int unlockReadSem(int semId)
{
struct sembuf sem;
sem.sem_flg = SEM_UNDO;
sem.sem_num = readWorking;
sem.sem_op = -1;
SEM_readWorking:
if (semop(semId, &sem, 1))
{
switch (errno)
{
case EINTR:
goto SEM_readWorking;
break;
default:
perror("unlockRead sem take error:");
return -1;
break;
}
}
return 0;
}
void semInfo(int semId)
{
unsigned short semInfo[3];
semctl(semId, 0, GETALL, semInfo);
//enum semName {wantWrite=0,readWorking=1,writeWorking=2};
printf("\nsem writeWorking=%d\n", semInfo[writeWorking]);
printf("sem readWorking=%d\n", semInfo[readWorking]);
printf("sem wantWrite=%d\n", semInfo[wantWrite]);
}
================================================
FILE: src/dlist.c
================================================
/*
* Circular Doubly Linked List implementation
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dlist.h"
/*
* Add a node to the head of dlist
*/
int add_head_dlist(dlist_pp head, dlist_p node)
{
if (!node) {
log(ERROR, "node is NULL!\n");
return -1;
}
if (!head) {
log(ERROR, "head is NULL!\n");
return -1;
}
if (!*head) {
node->next = node;
node->prev = node;
*head = node;
return 1;
}
node->next = *head; /* Current head become head->next */
node->prev = (*head)->prev;
(*head)->prev->next = node;
(*head)->prev = node;
*head = node;
return 1;
}
/*
* Get the value in the head node of dlist
* The node is not deleted
*/
void *get_head_dlist(dlist_pp head)
{
if (!head || !*head) {
log(DEBUG, "head or first node is NULL!\n");
return NULL;
}
return (*head)->data;
}
/*
* Get the value in the tail node of dlist
* The node is not deleted
*/
void *get_tail_dlist(dlist_pp head)
{
if (!head || !*head) {
log(DEBUG, "head or first node is NULL!\n");
return NULL;
}
return (*head)->prev->data;
}
/*
* Delete the head node of dlist
*/
int delete_head_dlist(dlist_pp head)
{
dlist_p tmp;
if (!head || !*head) {
log(DEBUG, "No nodes to delete!\n");
return -1;
}
if (*head == (*head)->next) {
free(*head);
*head = NULL;
return 1;
}
tmp = *head;
(*head)->data = NULL;
(*head)->prev->next = (*head)->next;
(*head)->next->prev = (*head)->prev;
*head = (*head)->next; /* head->next becomes next head */
free(tmp);
return 1;
}
/*
* Delete the tail node of dlist
*/
int delete_tail_dlist(dlist_pp head)
{
dlist_p tmp;
if (!head || !*head) {
log(DEBUG, "head or first node is NULL!\n");
return -1;
}
if (*head == (*head)->next) {
free(*head);
*head = NULL;
return 1;
}
tmp = (*head)->prev;
tmp->data = NULL;
tmp->prev->next = tmp->next; /* tail->prev becomes new tail */
tmp->next->prev = tmp->prev;
free(tmp);
return 1;
}
/*
* Deallocate all memory and destroy the dlist
* Returns the number of nodes deleted
*/
int destroy_dlist(dlist_pp head)
{
dlist_p tmp;
int deleted = 0;
if (!head) {
log(DEBUG, "head is NULL.\n");
return -1;
}
if (!*head) {
log(DEBUG, "No nodes to delete.\n");
return 0;
}
/* Set tail->next to NULL to end deletion loop */
(*head)->prev->next = NULL;
while (*head) {
tmp = *head;
(*head)->data = NULL;
(*head)->prev = NULL;
*head = (*head)->next;
free(tmp);
deleted++;
}
return deleted;
}
/*
* Count the total number of nodes in the dlist
*/
int count_nodes_dlist(dlist_pp head)
{
dlist_p tmp;
int count = 0;
if (!head || !*head) {
log(DEBUG, "head or first node is NULL!\n");
return -1;
}
tmp = *head;
do {
count++;
tmp = tmp->next;
} while (tmp != *head);
return count;
}
================================================
FILE: src/log.c
================================================
/*
* A modular, level based log file implementation
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2014 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "log.h"
extern int current_log_level;
char *logarr[] = {"ERROR", "INFO", "DEBUG"};
void debug_log(const char *file,
const char *func,
int line,
int level,
const char *format,
...)
{
va_list ap;
va_start(ap, format);
if (level < 0 || level > DEBUG)
return;
if (level <= current_log_level) {
fprintf(stderr, "[%s, %s(), ln %d] %s: ",
file, func, line, logarr[level]);
vfprintf(stderr, format, ap);
}
va_end(ap);
}
================================================
FILE: src/queue.c
================================================
/*
* Queue implementation
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "queue.h"
/*
* Create a new Queue
* Alocate a head node
*/
queue_p get_queue(void)
{
queue_p queue = calloc(1, sizeof(queue_t));
queue->head = calloc(1, sizeof(dlist_pp));
return queue;
}
/*
* Add a value to Queue
* Allocates a new dlist node and inserts value
*/
bool enqueue(queue_p queue, void *val)
{
dlist_p nodeptr = calloc(1, sizeof(dlist_t));
nodeptr->data = val;
return (add_head_dlist(queue->head, nodeptr) == 1); /* Last In */
}
/*
* Remove the value at the front of the Queue
* Deallocates the dlist node holding the value
*/
void *dequeue(queue_p queue)
{
void *data = get_tail_dlist(queue->head); /* Last Out */
if (delete_tail_dlist(queue->head) == -1)
log(DEBUG, "head or first node is NULL!\n");
return data;
}
/*
* Check if a Queue has any elements
*/
bool isQueueEmpty(queue_p queue)
{
if (get_head_dlist(queue->head))
return TRUE;
return FALSE;
}
/*
* Deallocate all dlist nodes
* Destroy Queue
*/
bool destroy_queue(queue_p queue)
{
if (destroy_dlist(queue->head) == -1)
return FALSE;
free(queue->head);
free(queue);
return TRUE;
}
================================================
FILE: src/stack.c
================================================
/*
* Stack implementation
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "stack.h"
/*
* Create a new Stack
* Alocate a head node
*/
stack_p get_stack(void)
{
stack_p stack = calloc(1, sizeof(stack_t));
stack->head = calloc(1, sizeof(dlist_pp));
return stack;
}
/*
* Push a value to Stack
* Allocates a new dlist node and inserts value
*/
bool push(stack_p stack, void *val)
{
dlist_p nodeptr = calloc(1, sizeof(dlist_t));
nodeptr->data = val;
return (add_head_dlist(stack->head, nodeptr) == 1); /* Last In */
}
/*
* Pop a value from Stack
* Deallocates the dlist node holding the value
*/
void *pop(stack_p stack)
{
void *data = get_head_dlist(stack->head); /* First out */
if (delete_head_dlist(stack->head) == -1)
log(DEBUG, "head or first node is NULL!\n");
return data;
}
/*
* Check if a stack has any elements
*/
bool isStackEmpty(stack_p stack)
{
if (get_head_dlist(stack->head))
return TRUE;
return FALSE;
}
/*
* Deallocate all dlist nodes
* Destroy Stack
*/
bool destroy_stack(stack_p stack)
{
if (destroy_dlist(stack->head) == -1)
return FALSE;
free(stack->head);
free(stack);
return TRUE;
}
================================================
FILE: src/tree.c
================================================
/*
* Iterative Binary Search Tree implementation
*
* Author: Ananya Jana <ananya.jana@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include "queue.h"
#include "stack.h"
#include "tree.h"
/*
* Delete all nodes of a tree
*/
int delete_tree_nodes(tree_p root)
{
int count = 0;
if (!root) {
log(ERROR, "root invalid.\n");
return -1;
}
if (root->left)
count += delete_tree_nodes(root->left);
if (root->right)
count += delete_tree_nodes(root->right);
free(root);
root = NULL;
return ++count;
}
/*=======================================================*/
/* Library exposed APIs start here */
/*=======================================================*/
/*
* Generate a tree from an array of integers
*/
tree_pp generate_tree(int *arr, int len)
{
int i = 0;
tree_pp head = NULL;
if (!arr || !len) {
log(ERROR, "Invalid array.\n");
return NULL;
}
head = init_tree();
for (; i < len; i++) {
if (insert_tree_node(head, arr[i]) == FALSE) {
log(ERROR, "Insertion failed.\n");
destroy_tree(head);
return NULL;
}
}
return head;
}
/*
* Initialize a tree with empty root node
*/
tree_pp init_tree(void)
{
tree_pp head = calloc(1, sizeof(tree_p));
*head = NULL;
return head;
}
/*
* Insert a new node into tree
*/
bool insert_tree_node(tree_pp head, int val)
{
tree_p root = NULL;
if (!head) {
log(ERROR, "Initialize tree first.\n");
return FALSE;
}
root = *head;
while (root) {
if (val < root->data) {
if (!root->left) {
root->left = calloc(1, sizeof(tree_t));
root = root->left;
root->data = val;
return TRUE;
}
root = root->left;
} else if (val > root->data) { /* Insert greater elements in right subtree */
if (!root->right) {
root->right = calloc(1, sizeof(tree_t));
root = root->right;
root->data = val;
return TRUE;
}
root = root->right;
} else {
log(ERROR, "BST must have unique values.\n");
break;
}
}
if (!*head) {
root = (tree_p) calloc(1, sizeof(tree_t));
root->data = val;
*head = root;
return TRUE;
}
return FALSE;
}
/*
* Delete a node from tree
*/
bool delete_tree_node(tree_pp head, int val)
{
tree_p root = NULL;
tree_p prev = NULL;
int direction;
if (!head) {
log(ERROR, "Initialize tree first.\n");
return FALSE;
}
root = *head;
while (root) {
if (val < root->data) {
if (!root->left)
break;
prev = root;
direction = LEFT;
root = root->left;
} else if (val > root->data) { /* Greater elements are in right subtree */
if (!root->right)
break;
prev = root;
direction = RIGHT;
root = root->right;
} else { /* Match found */
if (!root->left) {
if (prev) {
if (direction == LEFT)
prev->left = root->right;
else
prev->right = root->right;
} else /* This was the root node */
*head = root->right;
free(root);
return TRUE;
} else if (!root->right) {
if (prev) {
if (direction == LEFT)
prev->left = root->left;
else
prev->right = root->left;
} else /* This was the root node */
*head = root->left;
free(root);
return TRUE;
} else { /* Both subtrees have children */
/* Delete inorder successor */
tree_p min = root->right;
while (min->left)
min = min->left;
root->data = min->data;
/* Let's use some recursion here */
delete_tree_node(&(root->right), min->data);
return TRUE;
}
}
}
/* Fall through if root is NULL */
return FALSE;
}
/*
* Destroy a tree
*/
int destroy_tree(tree_pp head)
{
int count = 0;
if (!head) {
log(ERROR, "head invalid.\n");
return -1;
}
count = delete_tree_nodes(*head);
free(head);
head = NULL;
return count;
}
/*
* Print the values in a tree in preorder
*/
int print_tree(tree_p root)
{
int count = 0;
if (!root) {
log(ERROR, "root invalid.\n");
return -1;
}
log(DEBUG, "keyNode: %d.\n", root->data);
++count;
if (root->left)
count += print_tree(root->left);
if (root->right)
count += print_tree(root->right);
return count;
}
/*
* Tree Breadth First Search implementation
* Implements iterative search using a Queue
* Checks for a match before adding a node to Queue
*
* PARAMS
* ------
* root: pointer to the root node pointer of a tree
* val : value to search
* stop: stop if val is found
*/
bool search_BFS(tree_pp root, int val, bool stop)
{
tree_p node = NULL;
queue_p queue = NULL;
int ret = FALSE;
if (!root || !*root) {
log(ERROR, "tree or root node is NULL!\n");
return FALSE;
}
/* Check for a match in root node */
node = *root;
if (node->data == val) {
log(INFO, "FOUND %d\n", val);
if (stop)
return TRUE;
}
queue = get_queue();
/* Add root node to Queue */
if (!enqueue(queue, *root)) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return FALSE;
}
/* Loop through all nodes in the Queue */
while ((node = dequeue(queue)) != NULL) {
log(INFO, "tracking...\n");
/* Process left child of node */
if (node->left) {
if (node->left->data == val) {
log(INFO, "FOUND %d\n", val);
ret = TRUE;
if (stop)
break;
}
/* Add left child to Queue */
if (!enqueue(queue, node->left)) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return FALSE;
}
}
/* Process right child of node */
if (node->right) {
if (node->right->data == val) {
log(INFO, "FOUND %d\n", val);
ret = TRUE;
if (stop)
break;
}
/* Add right child to Queue */
if (!enqueue(queue, node->right)) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return FALSE;
}
}
}
/* Report if no match was found */
if (!ret)
log(INFO, "NOT FOUND\n");
destroy_queue(queue);
return ret;
}
/*
* Tree Depth First Search implementation
* Implements iterative search using a Stack
* Checks for a match before adding a node to Stack
*
* PARAMS
* ------
* root: pointer to the root node pointer of a tree
* val : value to search
* stop: stop if val is found
*/
bool search_DFS(tree_pp root, int val, bool stop)
{
int ret = FALSE;
tree_p node = NULL;
stack_p stack = NULL;
if (!root || !*root) {
log(ERROR, "tree or root node is NULL.\n");
return FALSE;
}
/* Check for a match in root node */
node = *root;
if (node->data == val) {
log(INFO, "FOUND %d\n", val);
if (stop)
return TRUE;
}
stack = get_stack();
/* Add root node to Stack */
if (!push(stack, *root)) {
log(ERROR, "push failed!\n");
destroy_stack(stack);
return FALSE;
}
/* Process all valid nodes */
while (node) {
log(INFO, "tracking...\n");
/* Match and add complete
left subtree to Stack */
while (node->left) {
if (node->left->data == val) {
log(INFO, "FOUND %d\n", val);
ret = TRUE;
if (stop) {
node = NULL;
break;
}
}
/* Add node to stack */
if (!push(stack, node->left)) {
log(ERROR, "push failed!\n");
destroy_stack(stack);
return FALSE;
}
node = node->left;
}
while ((node = pop(stack)) != NULL) {
/* Process right child of node */
if (node->right) {
if (node->right->data == val) {
log(INFO, "FOUND %d\n", val);
ret = TRUE;
if (stop) {
node = NULL;
break;
}
}
/* Add right child to Stack */
if (!push(stack, node->right)) {
log(ERROR, "push failed!\n");
destroy_stack(stack);
return FALSE;
}
node = node->right;
/* Break inner loop if there's a right node */
break;
}
}
}
/* Report if no match was found */
if (!ret)
log(INFO, "NOT FOUND\n");
destroy_stack(stack);
return ret;
}
================================================
FILE: test/Makefile
================================================
CC = gcc
CFLAGS = -Wall -Wextra -g -fsanitize=address,undefined $(INCLUDE)
#INCLUDE = -I/usr/include/dslib
#LIBS = -lds
#SRCDIR =
INCLUDE = -I../include
LIBS =
SRCDIR = ../src/*.c
all:
$(CC) $(CFLAGS) $(INCLUDE) $(SRCDIR) -o test_avl_1 test_avl_1.c $(LIBS)
$(CC) $(CFLAGS) $(INCLUDE) $(SRCDIR) -o test_bst_1 test_bst_1.c $(LIBS)
$(CC) $(CFLAGS) $(INCLUDE) $(SRCDIR) -o test_dlist_1 test_dlist_1.c $(LIBS)
$(CC) $(CFLAGS) $(INCLUDE) $(SRCDIR) -o test_queue_1 test_queue_1.c $(LIBS)
$(CC) $(CFLAGS) $(INCLUDE) $(SRCDIR) -o test_stack_1 test_stack_1.c $(LIBS)
$(CC) $(CFLAGS) $(INCLUDE) $(SRCDIR) -o avl_Thread_Safe_Test avl_Thread_Safe_Test.c $(LIBS) -lpthread
.PHONY: clean
clean:
rm -f test_avl_1 test_bst_1 test_dlist_1 test_queue_1 test_stack_1 avl_Thread_Safe_Test
================================================
FILE: test/avl_Thread_Safe_Test.c
================================================
/*
* Test cases for AVL-ThreadSafe tree
*
* Author: Emanuele Alfano <alfystar1701@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* This demo works in posix, it create "nSearch" thread and him call forEver
* "search_BFS_avl_S", with ctrl+c you send a lockWrite,
* with ctrl+z you send unlockWrite
*
* The function must send in order:
* 1° Lock-write
* 2° Unlock-write
*
* Is also possible send different configuratio:
* 1° Lock-write
* 2° Lock-write
* 3° Lock-write
* 4° Unlock-write
* 5° Unlock-write
* 6° Unlock-write
* ...
*
* To end script type ctrl+\ (sigKill)
*
*
* Is important to see that, when first writeLock arrive, search thread just at work
* finish his work and finaly the write lock arrive
*/
#define nSearch 50
#include <common.h>
#include "avl.h"
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
int current_log_level = DEBUG;
avl_pp_S head;
int n_nodeInsert;
int searchRange;
int writePending;
void *searchTh(void *info)
{
int id = *(int *)info;
int keySearch;
int found;
while (1) {
keySearch = (int) random() % searchRange;
found = search_BFS_avl_S(head, keySearch, TRUE);
printf("TH-Search %d Search key %d and ret %d\n", id, keySearch, found);
usleep(1000000*random()%100); //random wait between 1 and 100 ms
}
free(info);
return NULL;
}
void lockWriteSem_sig(int sig)
{
writePending++;
printf("\n\t****sigINT receive sig = %d; n°writePending = %d\n\n", sig, writePending);
lockWriteSem(head.semId);
printf("\n\t####sigInt lock Write TAKE\n");
}
void unlockWriteSem_sig(int sig)
{
//note, if writePending = 0, this signal stay in wait until arrive one lockWriteSem_sig,
//but the library wasn't design tu solve this!!! It work only if every Writer, on the Start lock the tree, and at the End unlock then.
printf("\n\t#(sigTSTP) receive sig = %d\n\n", sig);
unlockWriteSem(head.semId);
writePending--;
printf("\n\t#(sigTSTP) unlock Write; n°writePending = %d\n", writePending);
}
int main(void)
{
signal(SIGINT, lockWriteSem_sig);
signal(SIGTSTP, unlockWriteSem_sig);
head = init_avl_S();
n_nodeInsert = nSearch * 10;
searchRange = n_nodeInsert * 2;
for (int count = 0; count < n_nodeInsert; count++) {
if (insert_avl_node_S(head, count, (int)random() % searchRange) == FALSE) {
log(ERROR, "Insertion failed.\n");
destroy_avl(head.avlRoot);
return 0;
}
}
print_avl_S(head);
//sleep(20); //to give time to see tree print
pthread_t tid;
printf("Start search Thread\n");
for (int count = 0; count < nSearch; count++) {
int *i = malloc(sizeof(int));
*i = count;
pthread_create(&tid, NULL, searchTh, i);
}
while (1)
pause();
return 0;
}
================================================
FILE: test/test_avl_1.c
================================================
/*
* Test cases for AVL tree
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <avl.h>
int current_log_level = INFO;
int main(int argc, char **argv)
{
int count = 0;
bool stop = FALSE;
avl_pp head = init_avl();
int arr[] = {30, 110, 10, 90, 120, 150, 70,
140, 40, 130, 20, 50, 100, 80, 60};
/* int arr[] = {10, 20, 30, 40, 50, 60, 70, 80,
90, 100, 110, 120, 130, 140, 150}; */
int len = sizeof(arr) / sizeof(arr[0]);
for (; count < len; ++count) {
if (insert_avl_node(head, arr[count], 20) == FALSE) {
log(ERROR, "Insertion failed.\n");
destroy_avl(head);
return 0;
}
}
if (argc == 2)
search_BFS_avl(head, atoi(argv[1]), stop);
else
search_BFS_avl(head, 10, stop);
count = print_avl(*head, *head);
log(INFO, "nodes printed: %d\n\n", count);
if (delete_avl_node(head, 110) == TRUE)
log(INFO, "AVL node deleted\n\n");
count = print_avl(*head, *head);
log(INFO, "nodes printed: %d\n", count);
count = destroy_avl(head);
log(INFO, "nodes deleted: %d\n", count);
return 0;
}
================================================
FILE: test/test_bst_1.c
================================================
/*
* Test cases for BST
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <tree.h>
int current_log_level = INFO;
/* Test BST */
int main(int argc, char **argv)
{
int count = 0;
bool stop = TRUE;
tree_pp head = NULL;
int arr[] = {10, 20, 30, 40, 50};
log(DEBUG, "Calling generate_tree()\n");
head = generate_tree(arr, sizeof(arr) / sizeof(arr[0]));
if (argc == 2)
search_BFS(head, atoi(argv[1]), stop);
else
search_BFS(head, 10, stop);
count = print_tree(*head);
log(INFO, "nodes printed: %d\n", count);
delete_tree_node(head, 30);
log(INFO, "\n\n");
count = print_tree(*head);
log(INFO, "nodes printed: %d\n", count);
count = destroy_tree(head);
log(INFO, "nodes deleted: %d\n", count);
return 0;
}
================================================
FILE: test/test_dlist_1.c
================================================
/*
* Test cases for dlist
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <dlist.h>
int current_log_level = INFO;
/* Test dlist */
int main(void)
{
int count = 5;
dlist_p *head_pp = calloc(1, sizeof(dlist_p *));
while (count) {
dlist_p node_p = calloc(1, sizeof(dlist_t));
log(DEBUG, "node address %p\n", node_p);
if (add_head_dlist(head_pp, node_p) == -1) {
log(ERROR, "add_head_dlist failed!\n");
return -1;
}
log(DEBUG, "Node added\n");
count--;
}
log(DEBUG, "Total nodes1: %d\n", count_nodes_dlist(head_pp));
if (delete_head_dlist(head_pp)) {
log(DEBUG, "Total nodes after head delete: %d\n",
count_nodes_dlist(head_pp));
} else {
log(ERROR, "delete_head_dlist failed!\n");
return -1;
}
log(DEBUG, "Total nodes2: %d\n", count_nodes_dlist(head_pp));
if (delete_tail_dlist(head_pp)) {
log(DEBUG, "Total nodes after tail delete: %d\n",
count_nodes_dlist(head_pp));
} else {
log(ERROR, "delete_tail_dlist failed!\n");
return -1;
}
log(DEBUG, "Nodes destroyed: %d\n", destroy_dlist(head_pp));
log(DEBUG, "Total nodes: %d\n", count_nodes_dlist(head_pp));
free(head_pp);
return 0;
}
================================================
FILE: test/test_queue_1.c
================================================
/*
* Test cases for queue
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <queue.h>
int current_log_level = DEBUG;
/* Test queue */
int main(void)
{
int count = 5;
int arr[5] = {0, 1, 2, 3, 4};
int *val;
queue_p queue = get_queue();
while (count) {
if (enqueue(queue, &arr[--count]) == FALSE) {
log(ERROR, "enqueue failed!\n");
destroy_queue(queue);
return -1;
}
log(DEBUG, "enqueued: arr[%d] = %d\n", count, arr[count]);
}
count = 5;
while (count) {
val = dequeue(queue);
if (val)
log(DEBUG, "dequeued: arr[%d] = %d\n", --count, (int)*val);
else
log(ERROR, "dequeue failed!\n");
}
destroy_queue(queue);
return 0;
}
================================================
FILE: test/test_stack_1.c
================================================
/*
* Test cases for stack
*
* Author: Arun Prakash Jana <engineerarun@gmail.com>
* Copyright (C) 2015 by Arun Prakash Jana <engineerarun@gmail.com>
*
* 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 3 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 dslib. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <stack.h>
int current_log_level = DEBUG;
/* Test stack */
int main(void)
{
int count = 5;
int arr[5] = {0, 1, 2, 3, 4};
int *val;
stack_p stack = get_stack();
while (count) {
if (push(stack, &arr[--count]) == FALSE) {
log(ERROR, "push failed!\n");
destroy_stack(stack);
return -1;
}
log(DEBUG, "pushed: arr[%d] = %d\n", count, arr[count]);
}
count = 5;
while (count) {
val = pop(stack);
if (val)
log(DEBUG, "popped: arr[%d] = %d\n", --count, (int)*val);
else
log(ERROR, "pop failed!\n");
}
destroy_stack(stack);
return 0;
}
gitextract_kexsks7t/
├── .github/
│ └── FUNDING.yml
├── CMakeLists.txt
├── LICENSE
├── Makefile
├── README.md
├── apilist.txt
├── include/
│ ├── avl.h
│ ├── common.h
│ ├── dlist.h
│ ├── log.h
│ ├── queue.h
│ ├── stack.h
│ └── tree.h
├── src/
│ ├── avl.c
│ ├── common.c
│ ├── dlist.c
│ ├── log.c
│ ├── queue.c
│ ├── stack.c
│ └── tree.c
└── test/
├── Makefile
├── avl_Thread_Safe_Test.c
├── test_avl_1.c
├── test_bst_1.c
├── test_dlist_1.c
├── test_queue_1.c
└── test_stack_1.c
SYMBOL INDEX (68 symbols across 19 files)
FILE: include/avl.h
type avl_t (line 26) | typedef struct avl {
type avl_pp_S (line 62) | typedef struct avlThSafe {
FILE: include/common.h
type semName (line 44) | enum semName {wantWrite=0,readWorking=1,writeWorking=2}
FILE: include/dlist.h
type dlist_t (line 26) | typedef struct dlist {
FILE: include/queue.h
type queue_t (line 26) | typedef struct {
FILE: include/stack.h
type stack_t (line 26) | typedef struct {
FILE: include/tree.h
type tree_t (line 25) | typedef struct tree {
FILE: src/avl.c
type nodedata (line 29) | typedef struct {
function height (line 37) | int height(avl_p node)
function BalanceFactor (line 53) | int BalanceFactor(avl_p node)
function avl_p (line 69) | avl_p RotateRight(avl_p node)
function avl_p (line 85) | avl_p RotateLeft(avl_p node)
function avl_p (line 101) | avl_p RightRight(avl_p node)
function avl_p (line 109) | avl_p LeftLeft(avl_p node)
function avl_p (line 117) | avl_p LeftRight(avl_p node)
function avl_p (line 126) | avl_p RightLeft(avl_p node)
function rebalance (line 135) | bool rebalance(stack_p stack, avl_pp head, avl_p tmp, int data)
function delete_avl_nodes (line 201) | int delete_avl_nodes(avl_p root)
function avl_pp (line 231) | avl_pp generate_avl(int *arr, int len)
function avl_pp (line 256) | avl_pp init_avl(void)
function insert_avl_node (line 267) | bool insert_avl_node(avl_pp head, int key, int data)
function delete_avl_node (line 362) | bool delete_avl_node(avl_pp head, int key)
function destroy_avl (line 435) | int destroy_avl(avl_pp head)
function print_avl (line 455) | int print_avl(avl_p root, avl_p parent)
function search_BFS_avl (line 495) | int search_BFS_avl(avl_pp root, int key, bool stop)
function avl_pp_S (line 586) | avl_pp_S generate_avl_S(int *arr, int len)
function avl_pp_S (line 611) | avl_pp_S init_avl_S(void)
function insert_avl_node_S (line 628) | bool insert_avl_node_S(avl_pp_S head, int key, int data)
function delete_avl_node_S (line 638) | bool delete_avl_node_S(avl_pp_S head, int key)
function search_BFS_avl_S (line 648) | int search_BFS_avl_S(avl_pp_S root, int key, bool stop)
function print_avl_S (line 658) | int print_avl_S(avl_pp_S root)
FILE: src/common.c
function semInit (line 8) | int semInit()
function lockWriteSem (line 33) | int lockWriteSem(int semId)
function unlockWriteSem (line 95) | int unlockWriteSem(int semId)
function lockReadSem (line 140) | int lockReadSem(int semId)
function unlockReadSem (line 169) | int unlockReadSem(int semId)
function semInfo (line 193) | void semInfo(int semId)
FILE: src/dlist.c
function add_head_dlist (line 26) | int add_head_dlist(dlist_pp head, dlist_p node)
function delete_head_dlist (line 86) | int delete_head_dlist(dlist_pp head)
function delete_tail_dlist (line 115) | int delete_tail_dlist(dlist_pp head)
function destroy_dlist (line 144) | int destroy_dlist(dlist_pp head)
function count_nodes_dlist (line 178) | int count_nodes_dlist(dlist_pp head)
FILE: src/log.c
function debug_log (line 26) | void debug_log(const char *file,
FILE: src/queue.c
function queue_p (line 27) | queue_p get_queue(void)
function enqueue (line 39) | bool enqueue(queue_p queue, void *val)
function isQueueEmpty (line 65) | bool isQueueEmpty(queue_p queue)
function destroy_queue (line 77) | bool destroy_queue(queue_p queue)
FILE: src/stack.c
function stack_p (line 27) | stack_p get_stack(void)
function push (line 39) | bool push(stack_p stack, void *val)
function isStackEmpty (line 65) | bool isStackEmpty(stack_p stack)
function destroy_stack (line 77) | bool destroy_stack(stack_p stack)
FILE: src/tree.c
function delete_tree_nodes (line 28) | int delete_tree_nodes(tree_p root)
function tree_pp (line 56) | tree_pp generate_tree(int *arr, int len)
function tree_pp (line 82) | tree_pp init_tree(void)
function insert_tree_node (line 93) | bool insert_tree_node(tree_pp head, int val)
function delete_tree_node (line 143) | bool delete_tree_node(tree_pp head, int val)
function destroy_tree (line 216) | int destroy_tree(tree_pp head)
function print_tree (line 236) | int print_tree(tree_p root)
function search_BFS (line 267) | bool search_BFS(tree_pp root, int val, bool stop)
function search_DFS (line 357) | bool search_DFS(tree_pp root, int val, bool stop)
FILE: test/avl_Thread_Safe_Test.c
function lockWriteSem_sig (line 83) | void lockWriteSem_sig(int sig)
function unlockWriteSem_sig (line 91) | void unlockWriteSem_sig(int sig)
function main (line 101) | int main(void)
FILE: test/test_avl_1.c
function main (line 26) | int main(int argc, char **argv)
FILE: test/test_bst_1.c
function main (line 27) | int main(int argc, char **argv)
FILE: test/test_dlist_1.c
function main (line 27) | int main(void)
FILE: test/test_queue_1.c
function main (line 27) | int main(void)
FILE: test/test_stack_1.c
function main (line 27) | int main(void)
Condensed preview — 27 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (107K chars).
[
{
"path": ".github/FUNDING.yml",
"chars": 61,
"preview": "# These are supported funding model platforms\n\ngithub: jarun\n"
},
{
"path": "CMakeLists.txt",
"chars": 794,
"preview": "set(CMAKE_POSITION_INDEPENDENT_CODE ON)\n\ncmake_minimum_required(VERSION 3.12)\n\nproject(dslib)\n\nfile(GLOB files CONFIGURE"
},
{
"path": "LICENSE",
"chars": 35142,
"preview": " GNU GENERAL PUBLIC LICENSE\n Version 3, 29 June 2007\n\n Copyright (C) 2007 Free "
},
{
"path": "Makefile",
"chars": 919,
"preview": "CC = gcc\nCFLAGS = -Wall -Wextra -Werror -O3 -fPIC $(INCLUDE)\n\nSRC = $(wildcard src/*.c)\nOBJS = $(SRC:%.c=%.o)\nINCLUDE = "
},
{
"path": "README.md",
"chars": 3317,
"preview": "# dslib\n`dslib` is a library of cohesive data structures. The goal of `dslib` is to demonstrate how complex data structu"
},
{
"path": "apilist.txt",
"chars": 1586,
"preview": "########################################\n1. Circular Doubly Linked List [dlist.h]\n######################################"
},
{
"path": "include/avl.h",
"chars": 2588,
"preview": "/*\n * AVL Tree abstraction\n * Ref: https://en.wikipedia.org/wiki/AVL_tree\n *\n * Author: Arun Prakash Jana <engineerarun@"
},
{
"path": "include/common.h",
"chars": 2566,
"preview": "/*\n * Common header file for dslib\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Aru"
},
{
"path": "include/dlist.h",
"chars": 1477,
"preview": "/*\n * Circular Doubly Linked List abstraction\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) "
},
{
"path": "include/log.h",
"chars": 1188,
"preview": "/*\n * A modular, level based log file implementation\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyrig"
},
{
"path": "include/queue.h",
"chars": 1244,
"preview": "/*\n * Queue abstraction\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakash J"
},
{
"path": "include/stack.h",
"chars": 1233,
"preview": "/*\n * Stack abstraction\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakash J"
},
{
"path": "include/tree.h",
"chars": 1554,
"preview": "/*\n * Binary Search Tree abstraction\n *\n * Author: Ananya Jana <ananya.jana@gmail.com>\n * Copyright (C) 2015 by Arun Pra"
},
{
"path": "src/avl.c",
"chars": 13022,
"preview": "/*\n * AVL Tree implementation\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Pra"
},
{
"path": "src/common.c",
"chars": 3407,
"preview": "//\n// Created by alfylinux on 21/10/18.\n//\n\n#include \"common.h\"\n\n\nint semInit()\n{\n\tint semId = semget(IPC_PRIVATE,3, IPC"
},
{
"path": "src/dlist.c",
"chars": 3502,
"preview": "/*\n * Circular Doubly Linked List implementation\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright ("
},
{
"path": "src/log.c",
"chars": 1278,
"preview": "/*\n * A modular, level based log file implementation\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyrig"
},
{
"path": "src/queue.c",
"chars": 1909,
"preview": "/*\n * Queue implementation\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakas"
},
{
"path": "src/stack.c",
"chars": 1884,
"preview": "/*\n * Stack implementation\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakas"
},
{
"path": "src/tree.c",
"chars": 8330,
"preview": "/*\n * Iterative Binary Search Tree implementation\n *\n * Author: Ananya Jana <ananya.jana@gmail.com>\n * Copyright (C) 201"
},
{
"path": "test/Makefile",
"chars": 779,
"preview": "CC = gcc\nCFLAGS = -Wall -Wextra -g -fsanitize=address,undefined $(INCLUDE)\n\n#INCLUDE = -I/usr/include/dslib\n#LIBS = -lds"
},
{
"path": "test/avl_Thread_Safe_Test.c",
"chars": 3407,
"preview": "/*\n * Test cases for AVL-ThreadSafe tree\n *\n * Author: Emanuele Alfano <alfystar1701@gmail.com>\n * Copyright (C) 2015 by"
},
{
"path": "test/test_avl_1.c",
"chars": 1773,
"preview": "/*\n * Test cases for AVL tree\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Pra"
},
{
"path": "test/test_bst_1.c",
"chars": 1481,
"preview": "/*\n * Test cases for BST\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakash "
},
{
"path": "test/test_dlist_1.c",
"chars": 1902,
"preview": "/*\n * Test cases for dlist\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakas"
},
{
"path": "test/test_queue_1.c",
"chars": 1417,
"preview": "/*\n * Test cases for queue\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakas"
},
{
"path": "test/test_stack_1.c",
"chars": 1399,
"preview": "/*\n * Test cases for stack\n *\n * Author: Arun Prakash Jana <engineerarun@gmail.com>\n * Copyright (C) 2015 by Arun Prakas"
}
]
About this extraction
This page contains the full source code of the jarun/dslib GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 27 files (96.8 KB), approximately 25.7k tokens, and a symbol index with 68 extracted functions, classes, methods, constants, and types. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.