#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/uio.h>

#define WASM_EXPORT __attribute__((visibility("default")))


typedef struct Rgb {
  int r;
  int g;
  int b;
  char name[50];
} RGB;

typedef struct Person {
  char fname[30];
  char name[30];
} People;

WASM_EXPORT
char * introduceYourself() {
  People Marc;
  strcpy(Marc.fname, "Marc");
  strcpy(Marc.name, "I");

  printf("Hello my name is %s \n", Marc.fname);

  People * Ly = malloc(sizeof(People));
  strcpy(Ly->fname, "Ly");
  return Ly->fname;
}

WASM_EXPORT
int main() {
  char lol[50] = {'l','o','l'};
  printf("Value of lol %s \n", lol);

  RGB *sleep = malloc(sizeof(RGB));

  sleep->r = 100;
  sleep->g = 200;
  sleep->b = 255;
  strcpy(sleep->name, "Blue rose");
  printf("Value of r %i \n", sleep->r);
  printf("Name of this beautiful color %s \n", sleep->name);
}

/* External function that is implemented in JavaScript. */
extern putc_js(char c);

/* Basic implementation of the writev sys call. */
WASM_EXPORT
size_t writev_c(int fd, const struct iovec *iov, int iovcnt) {
  size_t cnt = 0;
  for (int i = 0; i < iovcnt; i++) {
    for (int j = 0; j < iov[i].iov_len; j++) {
      putc_js(((char *)iov[i].iov_base)[j]);
    }
    cnt += iov[i].iov_len;
  }
  return cnt;
}