The program must only run on a Linux-Based machine and can only accept libraries of the C standard.

This program aims to generate text based on a Markov chain model using input from a CSV file. The CSV contains word sequences with their frequencies. The program should:

Read the CSV file and build a matrix structure.
Allow the user to specify a starting word or randomly select one based on punctuation.
Generate a specified number of words using probabilistic selection based on the frequencies in the CSV.
Use clock-based randomization for word selection.

However, the program enters an indeterminate loop, preventing any debugging or error analysis. There are potential issues with memory management, CSV parsing, or the probabilistic word selection algorithm. The code’s complexity makes it challenging to create a minimized version for debugging.
We’re seeking assistance from someone with a keen eye to identify potential issues in the code, particularly around memory management, file parsing, or the core algorithm implementation.

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <time.h>

// Structure to represent a word and its properties
typedef struct {
    char word[30];
    float frequency;
    int occurrence;
    int x;
    int y;
} WordNode;

// Structure to represent the matrix of words
typedef struct {
    WordNode** list;
    int* x;
    int y;
} WordMatrix;

// Structure for the trie-like dictionary
struct AlphabetNode {
    struct AlphabetNode* subAlphabet[31];
    WordNode *word;
};

typedef struct AlphabetNode Dictionary;

// Function prototypes
Dictionary* deallocateDict(Dictionary* dict);
int getASCIIIndex(char character);
bool compareStrings(char* string1, char* string2);
int operativeSearch(char string[], int index, Dictionary* dict, int y, WordMatrix* m);
void printGeneratedText(char startWord[30], WordMatrix m, Dictionary* dictionary, int y, int wordsToGenerate, int generatedWordCount, FILE* outputFile);

// Main function
int main() {
    Dictionary* dictionary = (Dictionary*)calloc(1, sizeof(Dictionary));
    dictionary->word = (WordNode*)malloc(sizeof(WordNode));
    
    FILE *inputFile = fopen("input.csv", "r");
    if (inputFile == NULL) {
        fprintf(stderr, "Error opening input file.n");
        return 1;
    }
    FILE *outputFile = fopen("output.txt", "w");
    WordMatrix matrix;
    matrix.y = 0;
    
    matrix.list = NULL;
    matrix.x = NULL;
    char chosenWord[30] = "";
    int wordsToGenerate;

    wordsToGenerate = 30;

    int* punctuationIndices = NULL;
    int capitalCount = 0;
    punctuationIndices = malloc(sizeof(int));

    // Read the CSV file and build the matrix
    while (true) {
        char character = fgetc(inputFile);
        if (character == EOF) {
            break;
        }

        fseek(inputFile, -1, SEEK_CUR);

        matrix.y++;
        matrix.list = realloc(matrix.list, matrix.y * sizeof(WordNode*));
        matrix.x = realloc(matrix.x, matrix.y * sizeof(int));
        matrix.list[matrix.y - 1] = NULL;
        matrix.x[matrix.y - 1] = 0;

        while (character != 'n' && character != EOF) {
            matrix.x[matrix.y - 1]++;
            matrix.list[matrix.y - 1] = realloc(matrix.list[matrix.y - 1], matrix.x[matrix.y - 1] * sizeof(WordNode));

            fseek(inputFile, -1, SEEK_CUR);
            fscanf(inputFile,"n");
            
            if (fscanf(inputFile, "%30[^,],", matrix.list[matrix.y - 1][matrix.x[matrix.y - 1] - 1].word) == 1) {
                if ((matrix.x[matrix.y - 1] - 1) == 0) {
                    operativeSearch(matrix.list[matrix.y - 1][matrix.x[matrix.y - 1] - 1].word, 0, dictionary, matrix.y - 1, &matrix);
                    if (matrix.list[matrix.y - 1][0].word[0] == '.' ||
                        matrix.list[matrix.y - 1][0].word[0] == '!' ||
                        matrix.list[matrix.y - 1][0].word[0] == '?'){

                        punctuationIndices[capitalCount] = matrix.y - 1;
                        printf("start indices: %dn", punctuationIndices[capitalCount]);
                        capitalCount++;
                        punctuationIndices = realloc(punctuationIndices, capitalCount * sizeof(int));
                    }
                }
            }
            
            if (fscanf(inputFile, "%f,", &matrix.list[matrix.y - 1][matrix.x[matrix.y - 1] - 1].frequency) == 1) {
            }

            character = fgetc(inputFile);
        }
    }

    // Generate text
    if(chosenWord[0] != ''){
        int y = operativeSearch(chosenWord, 0, dictionary, 0, &matrix);
        if(y == -1){
            printf("Invalid starting word");
        }
        else{
            printGeneratedText(chosenWord, matrix, dictionary, y, wordsToGenerate, 0, outputFile);
        } 
    }
    else{
        int len = capitalCount;
        srand(clock());
        int randomIndex = rand() % len;
        int punctuationIndex = punctuationIndices[randomIndex];

        for(int i = 1; i <= matrix.x[punctuationIndex]; i++){              
            int y = operativeSearch(matrix.list[punctuationIndex][i].word, 0, dictionary, punctuationIndex, &matrix);
            printGeneratedText(matrix.list[punctuationIndex][i].word, matrix, dictionary, y, wordsToGenerate, 0, outputFile);
            break;
        }
    }

    // Memory deallocation
    for (int i = 0; i <= 2; i++) {
        free(matrix.list[i]);
    }
    free(matrix.list);
    free(matrix.x);

    for (int i = 0; i < 30; i++) {
        dictionary->subAlphabet[i] = deallocateDict(dictionary->subAlphabet[i]);
    }
    free(dictionary->word);
    free(dictionary);

    return 0;
}

// Function to deallocate the dictionary
Dictionary* deallocateDict(Dictionary* dict) {
    if (dict == NULL) {
        return NULL;
    }

    for (int i = 0; i < 30; i++) {
        dict->subAlphabet[i] = deallocateDict(dict->subAlphabet[i]);
    }
    free(dict->word);
    free(dict);
    return NULL;
}

CSV input (input.csv):

What,do,1.0000
do,the,1.0000
the,weather,1.0000
weather,forecasts,0.3333,forecast,0.3333,!,0.3333
forecasts,say,1.0000
say,?,1.0000
?,Today's,0.5000,What,0.5000
Today's,weather,1.0000
forecast,uncertain,0.5000,is 0.5000
uncertain,weather,1.0000
!,Tomorrow's,1.0000
Tomorrow's,forecast,1.0000
is,uncertain,1.0000

Random Output file (output.txt):

Tomorrow's forecast is uncertain weather ! Tomorrow's forecast is uncertain weather ! Tomorrow's forecast is uncertain

Can you help analyze this code and suggest potential areas of improvement or identify the source of the infinite loop?