info2Wortsalat/Start_Linux/input.c

#include "input.h"
#include <string.h>
#include <ctype.h>

// TODO:
// eine Funktion implementieren, die ein einzelnes Wort aus einer Textdatei (words.txt) einliest und als C-String zurückgibt.

// Read words from file and store in 'words' array
int readWords(FILE *file, char words[][MAX_WORD_LEN], unsigned int maxWordCount)
{
    if(file == NULL) {
        return 0;
    }
    
    int wordCount = 0;
    char buffer[1024]; // Buffer for reading lines
    
    // Read file line by line
    while(fgets(buffer, sizeof(buffer), file) != NULL && wordCount < maxWordCount) {
        // Process each character in the line
        char currentWord[MAX_WORD_LEN];
        int wordIndex = 0;
        
        for(int i = 0; buffer[i] != '\0'; i++) {
            char c = buffer[i];
            
            // Check if character is a letter
            if(isalpha(c)) {
                // Convert to uppercase and add to current word
                if(wordIndex < MAX_WORD_LEN - 1) {
                    currentWord[wordIndex++] = toupper(c);
                }
            }
            else {
                // Non-letter character = word delimiter
                if(wordIndex > 0) {
                    // We have a complete word
                    currentWord[wordIndex] = '\0';
                    strcpy(words[wordCount], currentWord);
                    wordCount++;
                    wordIndex = 0;
                    
                    // Check if we've reached max word count
                    if(wordCount >= maxWordCount) {
                        return wordCount;
                    }
                }
            }
        }
        
        // Handle last word in line if it doesn't end with delimiter
        if(wordIndex > 0 && wordCount < maxWordCount) {
            currentWord[wordIndex] = '\0';
            strcpy(words[wordCount], currentWord);
            wordCount++;
        }
    }
    
    return wordCount;
}