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// Copyright (C) 2018-2019 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
//
#pragma once
#if defined(_WIN32)
#ifndef NOMINMAX
# define NOMINMAX
#endif
#include <WinSock2.h>
#include <Windows.h>
#include <stdlib.h>
#else
#include <unistd.h>
#include <cstdlib>
#include <string.h>
#endif
#include <string>
#include <sys/stat.h>
#if defined(WIN32)
// Copied from linux libc sys/stat.h:
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
struct dirent {
char *d_name;
explicit dirent(const wchar_t *wsFilePath) {
size_t i;
auto slen = wcslen(wsFilePath);
d_name = static_cast<char*>(malloc(slen + 1));
wcstombs_s(&i, d_name, slen + 1, wsFilePath, slen);
}
~dirent() {
free(d_name);
}
};
class DIR {
WIN32_FIND_DATAA FindFileData;
HANDLE hFind;
dirent *next;
static inline bool endsWith(const std::string &src, const char *with) {
int wl = static_cast<int>(strlen(with));
int so = static_cast<int>(src.length()) - wl;
if (so < 0) return false;
return 0 == strncmp(with, &src[so], wl);
}
public:
explicit DIR(const char *dirPath) : next(nullptr) {
std::string ws = dirPath;
if (endsWith(ws, "\\"))
ws += "*";
else
ws += "\\*";
hFind = FindFirstFileA(ws.c_str(), &FindFileData);
FindFileData.dwReserved0 = hFind != INVALID_HANDLE_VALUE;
}
~DIR() {
if (!next) delete next;
FindClose(hFind);
}
bool isValid() const {
return (hFind != INVALID_HANDLE_VALUE && FindFileData.dwReserved0);
}
dirent* nextEnt() {
if (next != nullptr) delete next;
next = nullptr;
if (!FindFileData.dwReserved0) return nullptr;
wchar_t wbuf[4096];
size_t outSize;
mbstowcs_s(&outSize, wbuf, 4094, FindFileData.cFileName, 4094);
next = new dirent(wbuf);
FindFileData.dwReserved0 = FindNextFileA(hFind, &FindFileData);
return next;
}
};
static DIR *opendir(const char* dirPath) {
auto dp = new DIR(dirPath);
if (!dp->isValid()) {
delete dp;
return nullptr;
}
return dp;
}
static struct dirent *readdir(DIR *dp) {
return dp->nextEnt();
}
static void closedir(DIR *dp) {
delete dp;
}
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