Thread: Library Symbol (String library)

Hi guys. Most of the people that I know don't care a ........
about programmation. I always liked this, and always
wanted to share knowledge with people who likes too.
So I am sharing my sort of technique to all of you.
If you all have any suggestion, please be free to do.
And here is the code.

Symbol.h

Code:

#ifndef SYMBOL_H
#define SYMBOL_H


#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <locale.h>


#ifdef __cplusplus
extern "C" {
#endif


    typedef enum {
        Off, On
    } STATUS;


    typedef struct Symbol SYMBOL;


    struct Symbol {
        char symbol;
        SYMBOL * preview, * next;
    };


    SYMBOL * symbol_set(char symbol);
    STATUS symbol_next_front(SYMBOL ** to, SYMBOL * next);
    STATUS symbol_next_back(SYMBOL ** to, SYMBOL * next);
    STATUS symbol_destroy(SYMBOL * to);
    
    typedef struct String STRING;
    struct String{
        SYMBOL * group;
        STRING * preview,* next;
    };
    
    STRING * string_set(char * group);
    STATUS   string_next_front(STRING ** to,STRING * next);
    STATUS   string_next_back(STRING ** to,STRING * next);
    
    STATUS   string_destroy(STRING * to);


#ifdef __cplusplus
}
#endif


#endif /// SYMBOL_H

Symbol.c

Code:

#include "symbol.h"


SYMBOL * symbol_set(char symbol) {
    SYMBOL * to = (SYMBOL *) malloc(sizeof (SYMBOL));
    to->symbol = symbol;
    to->preview = NULL;
    to->next = NULL;
}


STATUS symbol_next_front(SYMBOL ** to, SYMBOL * next) {
    if (next == NULL)return (Off);
    next->next = *to;
    if (*to != NULL) {
        (*to)->preview = next;
    }
    *to = next;
    return (On);
}


STATUS symbol_next_back(SYMBOL ** to, SYMBOL * next) {
    if (next == NULL)return (Off);
    if (*to != NULL) {
        SYMBOL * update = *to, * preview = NULL;
        while (update->next != NULL) {
            preview = update;
            update = update->next;
        }
        update->preview = preview;
        update->next = next;
        return (On);
    }
    *to = next;
    return (On);
}


void symbol_show_console(SYMBOL * to) {
    printf("%c", to->symbol);
}


STATUS symbol_destroy(SYMBOL * to) {
    if (to != NULL) {
        SYMBOL * symbol = to;
        while (symbol != NULL) {
            SYMBOL * next = symbol->next;
            free(symbol), symbol = next;
        }
        return (On);
    }
    return (Off);
}


STRING * string_set(char * group){
    STRING * to = (STRING *)malloc(sizeof(STRING));
    to->next    = to->preview = NULL;
    to->group   = NULL;
    int lenght = strlen(group),up=lenght;
    for(up=lenght-1;up>=0;up--)
        symbol_next_front(&to->group,symbol_set(group[up]));
    return(to);
}


STATUS   string_next_front(STRING ** to,STRING * next){
    if (next == NULL)return (Off);
    next->next = *to;
    if (*to != NULL) {
        (*to)->preview = next;
    }
    *to = next;
    return (On);
}


STATUS   string_next_back(STRING ** to,STRING * next){
    if (next == NULL)return (Off);
    if (*to != NULL) {
        STRING * update = *to, * preview = NULL;
        while (update->next != NULL) {
            preview = update;
            update = update->next;
        }
        update->preview = preview;
        update->next = next;
        return (On);
    }
    *to = next;
    return (On);
}


void string_show_console(STRING * to){
    SYMBOL * group = NULL;
    for(group = to->group;group != NULL;group=group->next)
        printf("%c",group->symbol);
}


STATUS   string_destroy(STRING * to){
    if (to != NULL) {
        STRING * symbol = to;
        while (symbol != NULL) {
            symbol_destroy(symbol->group);
            STRING * next = symbol->next;
            free(symbol), symbol = next;
        }
        return (On);
    }
    return (Off);
}

Main.c

Code:

/* 
 * File:   main.c
 * Author: Bean Dragon
 *
 * Created on 5 de Junho de 2015, 23:57
 */


#include "symbol.h"


int main(int argc, char** argv) {   
    STRING * array = NULL,* string;
    string_next_back(&array,string_set("First"));
    string_next_back(&array,string_set("Second"));
    string_next_back(&array,string_set("Third"));
    for(string=array;string!=NULL;string=string->next)
      string_show_console(string),printf("\n");    
    string_destroy(array);
    return (EXIT_SUCCESS);
}