Description: This is a search engine written in C. 
It includes:

1. Crawler -- crawls web pages recursively with a specified depth
2. Indexer -- creates an inverted index list of words and their occurrences along with the document ID
3. Query Engine -- command-line interface that creates a ranking system and query processor

How to build/test/clean:
* Run BATS_TSE.sh to build/test/clean crawler/indexer/query engine
* To clean the crawler logs and the crawler indexed HTML data, use "make cleanlog" in crawler dir
* To clean the indexer logs, use "make cleanlog" in indexer dir

Author: Delos Chang

Directory Structure:
.
├── BATS_TSE.sh
├── crawler_dir
│   ├── BATS.sh
│   ├── crawler
│   ├── crawler.c
│   ├── crawler.h
│   ├── data
│   ├── html.c
│   ├── html.h
│   ├── Makefile
│   ├── README
│   └── TESTING
├── indexer_dir
│   ├── BATS.sh
│   ├── documentation.pdf
│   ├── indexer
│   ├── indexer.c
│   ├── indexer.h
│   ├── Makefile
│   ├── README
│   └── TESTING
├── queryengine_dir
│   ├── Makefile
│   ├── queryengine.c
│   ├── queryengine.h
│   ├── queryengine_test.c
│   ├── querylogic.c
│   ├── querylogic.h
│   ├── README.md
│   └── TESTING
├── README
└── utils
    ├── file.c
    ├── file.h
    ├── hash.c
    ├── hash.h
    ├── header.h
    ├── index.c
    └── index.h

-- For Query Engine -- 
Functional Credit
1. To exit, type in "!exit" and press enter

Refactoring Credit
1. Refactored common definitions and macros to
   (../utils/header.h)
2. Refactored common index structs to (../utils/index.h)
3. Refactored indexer BATS.sh diff test to BATS_TSE.sh
4. Refactored common idioms in indexer and query engine to
   ../utils/index.c (i.e. creating a Document Node with X docId and Y
   frequency, getting a filepath, creating a WordNode)