Some utils to C

// myutils.h
// Utils to handle C, make everything easly.
// made by Artur 'hoOmE' Paiva <[email protected]>
// Under GPLv3 - http://www.gnu.org/licenses/gpl.html

// Define your os, can be "linux" or "windows".
char OS[] = "linux";

// Include basic input/output library and system utils.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

// Declare some vars
int null = NULL;
int none = NULL;
int false = 0;
int true = 1;

// Function to clear the screen
int clear() {
    int returned = 1;
    if (!strcmp(OS,"linux")) {
        returned = system("clear");
    } else if (!strcmp(OS,"windows")) {
        returned = system("cls");
    }
    return(returned);
}

// Structure to a simple string
typedef struct String {
    char *string;
    int size;
} string;

// Function to get a input
char * input(char *text,int size) {
    printf("%s",text);
    size+=2;
    char input[size];
    fflush(stdin);
    fgets(input,size,stdin);
    char *input2 = malloc(size);
    strcpy(input2,input);
    strtok(input2, "\n");
    return(input2);
}

// Function to convert to int
int toint(char *value) {
    return(atoi(value));
}

// Function to convert to char array
char *tostring(int value) {
    char *str = malloc(1);
    sprintf(str, "%d", value);
    return(str);
}

// Function to print text
int print(char *value) {
    printf("%s\n",value);
}

// Function to make a delay
void delay(int time) {
    if(!strcmp(OS,"linux")) {
        sleep(time);
    } else if (!strcmp(OS,"windows")) {
        sleep(time*1000);
    }
}

// Function to pause
int pause() {
    int returned = 1;
    if(!strcmp(OS,"linux")) {
        printf("\nPressione qualquer tecla para continuar...\n");
        returned = system("read null");
    } else if (!strcmp(OS,"windows")) {
        printf("\n");
        returned = system("pause");
    }
    return(returned);
}

// Function to create a menu
int menu(char *titulo,char *items[],int opcoes) {
    int counter = 0;
    if (opcoes > 9) {
        opcoes = 9;
    }
    if (opcoes < 1) {
        opcoes = 1;
    }
    int resultado = 0;
    clear();
    if (!strcmp(OS,"linux")) {
        printf("\033[1;37m\t%s\t\n\n",titulo);
    } else {
        printf("\t%s\t\n\n",titulo);
    }
    while (counter < opcoes) {
        if (!strcmp(OS,"linux")) {
            printf("\033[1;33m%d =>\033[1;37m %s\n",counter+1,items[counter]);
        } else if (!strcmp(OS,"windows")) {
            printf("%d => %s",counter+1,items[counter]);
        }
        counter++;
    }
    resultado = toint(input("\nType an option > \033[0m",1));
    if (resultado > opcoes || resultado < 1) {
        print("You typed a unvalid option!");
        pause();
        menu(titulo,items,opcoes);
    } else {
        return(resultado);
    }
}

// Function to ajust the screen
void screenfix() {
    if (!strcmp(OS,"linux")) {
        printf("\033[1;37m");
    } else if (!strcmp(OS,"windows")) {
        system("color 1F");
    }
}

// Print a vector
void print_r(int *vetor,int size,char separator) {
    int counter = 0;
    while (counter < size) {
        printf("%d%c",vetor[counter],separator);
        counter++;
    }
}

// Dump the values from a vector
void vardump(int *vetor, int size) {
    int counter = 0;
    printf("Array %p {\n",&vetor);
    while (counter < size) {
        printf("\t%d => %d\n",counter,vetor[counter]);
        counter++;
    }
    printf("}\n");
}

// Function that just "pass", useless in most cases, but here is
void pass() {
    printf("");
}