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Autocompletion in C

Uses a ternary search tree to store known words, allows for manual and dictionary file insertion. A visualization of the tree can be viewed at https://www.cs.usfca.edu/~galles/visualization/TST.html

Screenshot

Building

For the standard REPL, just run the included build.sh file, which will produce the ./autocomp binary.

Usage

This is just a demo; to use build, then run the binary. Press t to run tests, 'e' to exit, and w to enter a word and have the program return completions.

Verifying Memory Integrity

To check for memory leaks, install valgrind and run the following command: valgrind --leak-check=yes ./autocomp -v

API

Node* TST_insert(Node* node, const char* word); Inserts the word into the tree, returns the new root of the tree.

bool TST_doesContain(Node* root, const char* word); Returns whether word is contained in the tree referenced at root.

Node* TST_seed_from_file(Node* root, const char* file_name); Seeds the autocompletion tree with words from the given dictionary file, in this repository the included dictionary.txt file is used. Returns the new root Node.

void TST_clear(Node* node); Deletes all words in the tree and frees the tree's memory.

void TST_get_completions(Node* root, char* word); Prints a list of all completions of word that are contained in the tree.

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