fish/fish_shell/fish_utils.c

//
// Created by Antoine Bartuccio on 15/05/2017.
//

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "fish_utils.h"
#include "fish_types.h"

void crash(){
	char *crashErrors[] = {
			(char *) "fish: Fucking malloc always returning NULL pointer !",
			(char *) "fish: Error allocating fucking pointer !",
			(char *) "fish: C language exploding again",
			(char *) "fish: It's not you're fault for this time"
	};
	int picked = 0;

	srand((unsigned int) time(NULL));
	picked = rand() % (sizeof(crashErrors) / sizeof(char*));

	fprintf(stderr, "%s\n", crashErrors[picked]);
	exit(EXIT_FAILURE);
}

char *getInsult(){
	static int init = 0;
	int picked = 0;
	char *insults[] = {
			(char *) "Apprend à écrire crétin !",
			(char *) "Bolos !",
			(char *) "Mois aussi je sais écrire de la merde, pourtant je le fait pas !",
			(char *) "Oh ! Une erreur ! Comme ta vie en fait...",
			(char *) "Nul !",
			(char *) "Pense à aller à l'école un jour",
			(char *) "Et après on dit que c'est la faute de l'ordinateur..."
	};
	if (!init){
		srand((unsigned int) time(NULL));
		init = 1;
	}

	picked = rand() % (sizeof(insults) / sizeof(char*));
	return insults[picked];
}

void freeWordArray(WordArray *array) {
	int i;
	if (array != NULL) {
		for (i = 0; i < array->size; i++) {
			free(array->words[i]);
		}
		free(array->words);
		free(array);
	}
}


WordList *createWordList() {
	WordList *list = (WordList*) malloc(sizeof(WordList));
	if (list == NULL) crash();
	else {
		list->size = 0;
		list->first = NULL;
		list->last = NULL;
	}

	return list;
}

void addWordList(WordList *list, char *word) {
	WordListElement *newElement = (WordListElement*) malloc(sizeof(WordListElement));
	if (newElement == NULL) crash();
	else {
		newElement->next = NULL;
		newElement->previous = list->last;
		if (list->size == 0){
			list->first = newElement;
			list->last = newElement;
		} else {
			list->last->next = newElement;
			list->last = newElement;
		}
		newElement->word = strdup(word);
		list->size++;
	}
}

void removeWordList(WordList *list) {
	if (list != NULL) removeWordListElem(list, list->last);
}

void freeWordList(WordList *list) {
	while (list != NULL && list->size != 0)
		removeWordList(list);
	free(list);
}

WordArray *wordListToWordArray(WordList *list) {
	WordArray *array = (WordArray*) malloc(sizeof(WordArray));
	WordListElement *current = list->first;
	int i = 0;

	if (array == NULL) crash();
	else {
		array->size = list->size;
		array->words = (char **) malloc(sizeof(char *) * (list->size + 1));
		if (array->words == NULL) crash();

		while (current != NULL){
			array->words[i] = strdup(current->word);
			current = current->next;
			i++;
		}
		array->words[array->size] = NULL;
	}

	freeWordList(list);

	return array;
}

WordList *wordArrayToWordList(WordArray *array) {
	WordList *list = createWordList();
	int i;

	for (i=0; i<array->size; i++)
		addWordList(list, array->words[i]);

	freeWordArray(array);

	return list;
}

void removeWordListElem(WordList *list, WordListElement *elem) {
	if (list != NULL && elem != NULL){

		if (list->first == elem && list->last == elem){
			list->first = NULL;
			list->last = NULL;

		} else if (list->first == elem){
			list->first = elem->next;
			elem->previous = NULL;

		} else if (list->last == elem){
			list->last = elem->previous;
			elem->previous->next = NULL;

		} else {
			elem->next->previous = elem->previous;
			elem->previous->next = elem->next;
		}

		list->size--;

		if (elem->word != NULL)
			free(elem->word);

		free(elem);
	}
}

WordList *sliceWordList(WordList *list, int min_index, int max_index) {
	WordList *newList = createWordList();
	WordListElement *elem = NULL;
	WordListElement *tmp = NULL;
	int i=0;

	if (list == NULL || min_index > list->size || max_index > list->size) return newList;
	else {
		elem = list->first;
		while (i < max_index){

			tmp = elem->next;
			if (i >= min_index){
				addWordList(newList, elem->word);
				removeWordListElem(list, elem);
			}

			elem = tmp;

			i++;
		}
	}
	return newList;
}

WordList *splitWordList(WordList *list, char *token) {
	WordList * newList = NULL;
	WordListElement * current = list->first;
	int i = 0;

	while (current != NULL){
		if (!strcmp(current->word, token)){
			newList = sliceWordList(list, i + 1, list->size);
			removeWordListElem(list, current);
			current = NULL;
		}
		else current = current->next;
		i++;
	}

	return newList;
}