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

static void add_file(char *name, char ***files, int *size, int *capacity)
{
  if (*size == *capacity) {
    *capacity *= 2;
    *files = realloc(*files, sizeof(char*) * (*capacity));
  }
  (*files)[*size] = strdup(name);
  (*size)++;
}

static void add_files(char *name, char ***files, int *size, int *capacity)
{
  DIR *dir;
  struct dirent *entry;

  add_file(name, files, size, capacity);
  if (!(dir = opendir(name))) {
    return;
  }

  while ((entry = readdir(dir)) != NULL) {
    char path[1024];
    if (entry->d_type == DT_DIR) {
      if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
        continue;
      snprintf(path, sizeof(path), "%s/%s", name, entry->d_name);
      add_files(path, files, size, capacity);
    } else {
      snprintf(path, sizeof(path), "%s/%s", name, entry->d_name);
      add_file(path, files, size, capacity);
    }
  }
  closedir(dir);
}

/*int main(int argc, char *argv[]) {
  int capacity = 32, size = 0;
  char **files = malloc(sizeof(char*)*capacity);
  for (int i = 1; i < argc; i++) {
    add_files(argv[i], &files, &size, &capacity);
  }

  for (int f = 0; f < size; f++) {
    printf("%s\n", files[f]);
  }
  return 0;
}*/