javaxt-core-dll/FileAttributes.cpp at main · javaxt-project/javaxt-core-dll · GitHub

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#include "stdafx.h"

#include "FileAttributes.h"

#include <sstream>

#include <lm.h>

//#include <iostream> //for cout

using namespace std;

//******************************************************************************

//** FileAttributes Class

//******************************************************************************

/**

* JNI code used to list files, network drives, and file attributes on Windows

* file systems. Requires "mpr.lib" and "Netapi32.lib" for network IO.

******************************************************************************/

std::istringstream &operator >>(std::istringstream &iss, __int64 &n){

sscanf(iss.str().c_str(), "%I64d", &n);

return iss;

}

//**************************************************************************

//** from_string

//**************************************************************************

/** Allows users to append/concat an __int64 to a stringstream. This method

* is required for Visual Studio 6 compilers. Visual Studio 2003 and higher

* don't need this. GCC doesn't seem to need it either. Credit:

* http://www.codeguru.com/forum/archive/index.php/t-342716.html

template <typename T> bool from_string(T &t, const std::string &s, std::ios_base & (*f)(std::ios_base&)){

std::istringstream iss(s);

iss >> f, iss >> t;

return !iss.fail();

}

//**************************************************************************

//** date2int

//**************************************************************************

/** Converts FILETIME to a long value representing a date.

__int64 date2int(const FILETIME &ft){

SYSTEMTIME stUTC, stLocal;

// Convert the last-write time to local time.

FileTimeToSystemTime(&ft, &stUTC);

SystemTimeToTzSpecificLocalTime(NULL, &stUTC, &stLocal);

stringstream ss;

ss << stLocal.wYear;

if (stLocal.wMonth<10) ss << "0" << stLocal.wMonth;

else ss << stLocal.wMonth;

if (stLocal.wDay<10) ss << "0" << stLocal.wDay;

else ss << stLocal.wDay;

if (stLocal.wHour<10) ss << "0" << stLocal.wHour;

else ss << stLocal.wHour;

if (stLocal.wMinute<10) ss << "0" << stLocal.wMinute;

else ss << stLocal.wMinute;

if (stLocal.wSecond<10) ss << "0" << stLocal.wSecond;

else ss << stLocal.wSecond;

if (stLocal.wMilliseconds<100 && stLocal.wMilliseconds>10) ss << "0" << stLocal.wMilliseconds;

else if (stLocal.wMilliseconds<10) ss << "00" << stLocal.wMilliseconds;

else ss << stLocal.wMilliseconds;

//cout << ss.str();

//cout << "\n";

__int64 val;

bool bconvert = from_string<__int64>(val, ss.str(), std::dec); //ss >> val;

return val;

}

//**************************************************************************

//** GetFileAttributesEx

//**************************************************************************

/** Returns an array of long values representing WIN32_FILE_ATTRIBUTE_DATA.

* Credit: http://www.cplusplus.com/forum/windows/24603/

* Class: javaxt_io_File

* Method: GetFileAttributesEx

* Signature: (Ljava/lang/String;)[J

JNIEXPORT jlongArray JNICALL Java_javaxt_io_File_GetFileAttributesEx(JNIEnv *env, jclass, jstring filename)

{

//Convert jstring to wstring

const jchar *_filename = env->GetStringChars(filename, 0);

jsize len = env->GetStringLength(filename);

wstring path;

path.assign(_filename, _filename + len);

env->ReleaseStringChars(filename, _filename);

//Get attributes

WIN32_FILE_ATTRIBUTE_DATA fileAttrs;

BOOL result = GetFileAttributesExW(path.c_str(), GetFileExInfoStandard, &fileAttrs);

if (!result) {

jclass exceptionClass = env->FindClass("java/lang/Exception");

env->ThrowNew(exceptionClass, "Exception Occurred");

}

typedef struct _WIN32_FILE_ATTRIBUTE_DATA {

DWORD dwFileAttributes;

FILETIME ftCreationTime;

FILETIME ftLastAccessTime;

FILETIME ftLastWriteTime;

DWORD nFileSizeHigh;

DWORD nFileSizeLow;

} WIN32_FILE_ATTRIBUTE_DATA, *LPWIN32_FILE_ATTRIBUTE_DATA;

//Create an array to store the WIN32_FILE_ATTRIBUTE_DATA

jlong buffer[6];

buffer[0] = fileAttrs.dwFileAttributes;

buffer[1] = date2int(fileAttrs.ftCreationTime);

buffer[2] = date2int(fileAttrs.ftLastAccessTime);

buffer[3] = date2int(fileAttrs.ftLastWriteTime);

buffer[4] = fileAttrs.nFileSizeHigh;

buffer[5] = fileAttrs.nFileSizeLow;

jlongArray jLongArray = env->NewLongArray(6);

env->SetLongArrayRegion(jLongArray, 0, 6, buffer);

return jLongArray;

}

//**************************************************************************

//** GetTarget

//**************************************************************************

/** Returns the target of a WIndows Junction. Credit:

* http://www.flexhex.com/docs/articles/hard-links.phtml

* Class: javaxt_io_File

* Method: GetTarget

* Signature: (Ljava/lang/String;ZI)J

JNIEXPORT jstring JNICALL Java_javaxt_io_File_GetTarget(JNIEnv *env, jclass, jstring filename)

{

//Convert jstring to wstring

const jchar *_filename = env->GetStringChars(filename, 0);

jsize len = env->GetStringLength(filename);

wstring path;

path.assign(_filename, _filename + len);

env->ReleaseStringChars(filename, _filename);

LPCWSTR pPath = GetTarget(path.c_str());

if (pPath==NULL) return NULL;

else{

jchar * jc = (jchar *) pPath;

int i = wcslen(pPath);

return env->NewString(jc, i);

}

//**************************************************************************

//** GetSharedDrives - Requires Netapi32.lib

//**************************************************************************

/** Returns a list of shared drives found on a server

* Class: javaxt_io_File

* Method: GetSharedDrives

* Signature: (Ljava/lang/String;ZI)J

JNIEXPORT jstring JNICALL Java_javaxt_io_File_GetSharedDrives(JNIEnv *env, jclass, jstring servername)

{

//Convert jstring to wstring

const jchar *_servername = env->GetStringChars(servername, 0);

jsize x = env->GetStringLength(servername);

wstring str;

str.assign(_servername, _servername + x);

env->ReleaseStringChars(servername, _servername);

wstringstream ss;

PSHARE_INFO_502 BufPtr,p;

NET_API_STATUS res;

DWORD er=0,tr=0,resume=0, i;

do{

res = NetShareEnum ((LPWSTR) str.c_str(), 502, (LPBYTE *) &BufPtr, MAX_PREFERRED_LENGTH, &er, &tr, &resume);

if (res == ERROR_SUCCESS || res == ERROR_MORE_DATA){

p=BufPtr;

//Loop through the entries

for (i=1; i<=er; i++) {

//Iterate through the file changes

wstring type = L"Unknown";

bool ret = true;

switch(p->shi502_type){

case STYPE_DISKTREE: type = L"Disk"; break;

case STYPE_PRINTQ: type = L"Printer"; ret = false; break;

case STYPE_DEVICE: type = L"Device"; ret = false; break;

case STYPE_IPC: type = L"IPC"; ret = false; break;

//The following 2 lines won't compile on my Windows XP x32

//case STYPE_SPECIAL: type = L"Special"; break;

//case STYPE_TEMPORARY: type = L"Temp"; break;

}

wstring path = wstring(p->shi502_path);

if (path.empty()) ret = false;

if (ret) ss << wstring(p->shi502_netname) << L"\t" << type << L"\t" << path << L"\n";

//if (IsValidSecurityDescriptor(p->shi502_security_descriptor))

// printf("Yes\n");

//else

// printf("No\n");

p++;

}

//Free the allocated buffer

NetApiBufferFree(BufPtr);

}

else {

stringstream ss;

ss << res;

jclass exceptionClass = env->FindClass("java/lang/Exception");

env->ThrowNew(exceptionClass, ss.str().c_str());

}

while (res==ERROR_MORE_DATA);

wstring cstr = ss.str();

int len = cstr.size();

jchar* raw = new jchar[len];

memcpy(raw, cstr.c_str(), len*sizeof(wchar_t));

jstring result = env->NewString(raw, len);

delete[] raw;

return result;

}

//**************************************************************************

//** GetNetworkDrives

//**************************************************************************

/** Returns a list of network drives mounted on the host computer. This is

* similar to the "net use" command.

* Class: javaxt_io_File

* Method: GetNetworkDrives

* Signature: (Ljava/lang/String;ZI)J

JNIEXPORT jstring JNICALL Java_javaxt_io_File_GetNetworkDrives(JNIEnv *env, jclass)

{

wstringstream ss;

HANDLE h;

if (WNetOpenEnum(RESOURCE_REMEMBERED, RESOURCETYPE_DISK, RESOURCEUSAGE_ALL, NULL, &h) == NO_ERROR) {

DWORD is = 2;

NETRESOURCE buf[26] = { 0 };

DWORD c = -1;

DWORD s = sizeof(buf);

DWORD r;

if ((r = WNetEnumResource(h, &c, buf, &s)) != NO_ERROR){

jclass exceptionClass = env->FindClass("java/lang/Exception");

env->ThrowNew(exceptionClass, "Exception Occurred");

}

for (int i = 0; i < c; ++i){

NETRESOURCE ns = buf[i];

ss << ns.lpLocalName << L"\t" << ns.lpRemoteName << L"\n";

}

wstring cstr = ss.str();

int len = cstr.size();

jchar* raw = new jchar[len];

memcpy(raw, cstr.c_str(), len*sizeof(wchar_t));

jstring result = env->NewString(raw, len);

delete[] raw;

return result;

}

//**************************************************************************

//** GetFiles

//**************************************************************************

/** Returns a list of files found in the current directory. Note that the

* filename must end with "\*"

* Class: javaxt_io_File

* Method: GetFiles

* Signature: (Ljava/lang/String;ZI)J

JNIEXPORT jstring JNICALL Java_javaxt_io_File_GetFiles(JNIEnv *env, jclass, jstring directory)

{

HANDLE hFind;

try {

//Convert jstring to wstring

const jchar *_directory = env->GetStringChars(directory, 0);

jsize x = env->GetStringLength(directory);

wstring path; //L"C:\\temp\\*"; //Prepend "\\?\"

path.assign(_directory, _directory + x);

env->ReleaseStringChars(directory, _directory);

if (x<2){

jclass exceptionClass = env->FindClass("java/lang/Exception");

env->ThrowNew(exceptionClass, "Invalid path, less than 2 characters long.");

}

int pos = path.find_last_of(L'\\');

int size = path.size();

if (pos != size - 1)

{

throw std::exception("CUtils::TraverseFS no trailing slash after path");

}

wstringstream ss;

BOOL bContinue = TRUE;

WIN32_FIND_DATAW data;

hFind = FindFirstFileW(path.c_str(), &data);

if (INVALID_HANDLE_VALUE == hFind){

jclass exceptionClass = env->FindClass("java/lang/Exception");

env->ThrowNew(exceptionClass, "FindFirstFileW returned invalid handle.");

}

//HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);

//DWORD dwBytesWritten;

// If we have no error, loop thru the files in this dir

while (hFind && bContinue){

//Debug Print Statment. DO NOT DELETE! cout and wcout do not print unicode correctly.

WriteConsole(hStdOut, data.cFileName, (DWORD)_tcslen(data.cFileName), &dwBytesWritten, NULL);

WriteConsole(hStdOut, L"\n", 1, &dwBytesWritten, NULL);

//Check if this entry is a directory

if (data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY){

// Make sure this dir is not . or ..

if (wstring(data.cFileName) != L"." &&

wstring(data.cFileName) != L"..")

{

ss << wstring(data.cFileName) << L"\\" << L"\n";

}

else{

ss << wstring(data.cFileName) << L"\n";

}

bContinue = FindNextFileW(hFind, &data);

}

FindClose(hFind); // Free the dir structure

wstring cstr = ss.str();

int len = cstr.size();

//WriteConsole(hStdOut, cstr.c_str(), len, &dwBytesWritten, NULL);

//WriteConsole(hStdOut, L"\n", 1, &dwBytesWritten, NULL);

jchar* raw = new jchar[len];

memcpy(raw, cstr.c_str(), len*sizeof(wchar_t));

jstring result = env->NewString(raw, len);

delete[] raw;

return result;

}

catch(...){

FindClose(hFind);

jclass exceptionClass = env->FindClass("java/lang/Exception");

env->ThrowNew(exceptionClass, "Exception occured.");

}

return NULL;

}

//Code used to return a list of drives. Does not include disconnected network drives...

DWORD dwLogicalDrives = GetLogicalDrives();

UINT nDrive = 0;

for ( nDrive = 0; nDrive<32; nDrive++ ){

if ( dwLogicalDrives & (1 << nDrive) ){

wchar_t arr[] = { nDrive+'A', ':', '\\' };

wstring drive;

drive.assign(arr, arr + 3);

UINT uType = GetDriveTypeW(drive.c_str());

wstring type = L"";

switch(uType){

case DRIVE_REMOVABLE: type = L"FLOPPY"; break;

case DRIVE_FIXED: type = L"FIXED"; break;

case DRIVE_REMOTE: type = L"NETWORK"; break;

case DRIVE_CDROM: type = L"CDROM"; break;

case DRIVE_RAMDISK: type = L"RAMDISK"; break;

}

ss << drive << L"\t" << type << L"\n";

}

javaxt-core-dll/FileAttributes.cpp at main · javaxt-project/javaxt-core-dll · GitHub

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