tikker/tikker_words.h

#ifndef TIKKER_WORDS_H
#define TIKKER_WORDS_H

#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "tikker_types.h"

static inline int tikker_is_valid_word_char(char c) {
    return isalnum((unsigned char)c) || c == '_';
}

static inline int tikker_word_count_compare(const void *a, const void *b) {
    return ((tikker_word_count_t *)b)->count - ((tikker_word_count_t *)a)->count;
}

static inline int tikker_extract_words(const char *text, tikker_word_count_t *words, int max_words) {
    int word_count = 0;
    const char *p = text;
    char word[TIKKER_MAX_WORD_LEN];
    int word_len = 0;

    while (*p) {
        if (tikker_is_valid_word_char(*p)) {
            if (word_len < TIKKER_MAX_WORD_LEN - 1) {
                word[word_len++] = tolower((unsigned char)*p);
            }
        } else {
            if (word_len >= 2) {
                word[word_len] = '\0';

                int found = 0;
                for (int i = 0; i < word_count; i++) {
                    if (strcmp(words[i].word, word) == 0) {
                        words[i].count++;
                        found = 1;
                        break;
                    }
                }

                if (!found && word_count < max_words) {
                    strcpy(words[word_count].word, word);
                    words[word_count].count = 1;
                    word_count++;
                }
            }
            word_len = 0;
        }
        p++;
    }

    if (word_len >= 2) {
        word[word_len] = '\0';
        int found = 0;
        for (int i = 0; i < word_count; i++) {
            if (strcmp(words[i].word, word) == 0) {
                words[i].count++;
                found = 1;
                break;
            }
        }
        if (!found && word_count < max_words) {
            strcpy(words[word_count].word, word);
            words[word_count].count = 1;
            word_count++;
        }
    }

    return word_count;
}

static inline void tikker_sort_words(tikker_word_count_t *words, int count) {
    qsort(words, count, sizeof(tikker_word_count_t), tikker_word_count_compare);
}

#endif