#ifndef DATGPT_WIN_DIRENT_H
#define DATGPT_WIN_DIRENT_H
#ifdef _WIN32
#include <windows.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#define NAME_MAX MAX_PATH
typedef struct dirent { char d_name[MAX_PATH]; } struct_dirent_t;
typedef struct dat_win_dir {
	HANDLE handle;
	WIN32_FIND_DATAA data;
	int first;
	struct dirent entry;
} DIR;
static DIR *dat_opendir(const char *path)
{
	DIR *dir = (DIR *)calloc(1, sizeof(*dir));
	char pattern[MAX_PATH * 2];
	int n;
	if (!dir) return NULL;
	n = snprintf(pattern, sizeof(pattern), "%s\\*", path);
	if (n < 0 || (size_t)n >= sizeof(pattern)) { free(dir); errno = ENAMETOOLONG; return NULL; }
	dir->handle = FindFirstFileA(pattern, &dir->data);
	if (dir->handle == INVALID_HANDLE_VALUE) { free(dir); errno = ENOENT; return NULL; }
	dir->first = 1;
	return dir;
}
static struct dirent *dat_readdir(DIR *dir)
{
	if (!dir) return NULL;
	if (dir->first) dir->first = 0;
	else if (!FindNextFileA(dir->handle, &dir->data)) return NULL;
	strncpy(dir->entry.d_name, dir->data.cFileName, sizeof(dir->entry.d_name) - 1);
	dir->entry.d_name[sizeof(dir->entry.d_name) - 1] = 0;
	return &dir->entry;
}
static int dat_closedir(DIR *dir)
{
	int rc;
	if (!dir) { errno = EINVAL; return -1; }
	rc = FindClose(dir->handle) ? 0 : -1;
	free(dir);
	return rc;
}
#define opendir dat_opendir
#define readdir dat_readdir
#define closedir dat_closedir
#else
#include <dirent.h>
#endif
#endif