titbits from the world less travelled

Making a .sis file for Nokia [download makesis and Comdlg32.ocx]

The easiest way to create a .sis file would be to use the tool makesis. You can download the tool from here:

http://www.kmdarshan.com/makesis/Makesis_v1.0_by_Gip.rar

http://www.kmdarshan.com/makesis/Makesis_v1.0.zip

Also you would need to download this dll, and put it in your C:\Windows\System32 for this tool to work. you can download the dll here:

http://www.kmdarshan.com/makesis/Comdlg32.zip

good luck packaging.

posted by admin in Qt, c++ and have No Comments

Using Qtimer instead of Sleep

Sample code to use Qtimer in Qt instead of Sleep if you want a stoppage in your code:

slideShowtimer = new QTimer(this);

        selectedPicture = 0;
        //QTimer::singleShot(5000, this, SLOT(slideShowHelper()));
        connect(slideShowtimer, SIGNAL(timeout()), this, SLOT(slideShowHelper()));
        slideShowtimer->start(1000);

 
                                            
posted by admin in Qt, c++ and have No Comments

Implementing simple multithreading in C++

Bare steps to implement multi threading in C++:

a. Declare a global variable, to hold the reference counts.

b. Declare CRITICAL SECTION

code:

CRITICAL_SECTION cs_test;
int loadCnt=0;

c. Now everytime you access the code you want to be protected when multiple threads access them

InitializeCriticalSection(&cs_test);
EnterCriticalSection(&cs_test);

if(loadCnt >0)
{
loadCnt++;
return
}else{

//your code here

}

LeaveCriticalSection(&cs_test);

return;

d. you could do the same for de initializing also.

e. But the best way to do the above is to implement them using class and objects.

posted by admin in c++ and have No Comments

Windows developer tools you need to have

Some tools which I really find helpful are:

a. Multimon – Support for multiple monitors

b. Process Monitor

c. Process Explorer

d. Desktops – Desktops allows you to organize your applications on up to four virtual desktops.

e. OleView – For COM purposes

f. Spy++ – For windows GUI handling

g. Resource hunter – Reading resource files. It will be helpful when your working on multiple languages.

posted by admin in c++, windows and have No Comments

Tip 1: Optimize code to run faster

1. Use constants with reference when passing values in between methods.

Advantage: It will reduce space and will be faster. If you use a new variable then an additional copy is made and there is a small memory hit.

Ex: method(string val)

optimal usage: method(const string &val)

Here we are passing the value by reference.

posted by admin in c++ and have No Comments

ACL: Denying read access to a file in VC++

Snippet of the code to set the permissions and create a file while not granting read access to it:

DWORD dwRes;
PSID pEveryoneSID = NULL, pAdminSID = NULL;
PACL pACL = NULL;
PSECURITY_DESCRIPTOR pSD = NULL;
EXPLICIT_ACCESS ea[2];
SID_IDENTIFIER_AUTHORITY SIDAuthWorld =
SECURITY_WORLD_SID_AUTHORITY;
SID_IDENTIFIER_AUTHORITY SIDAuthNT = SECURITY_NT_AUTHORITY;
SECURITY_ATTRIBUTES sa;

// Create a well-known SID for the Everyone group.
if(!AllocateAndInitializeSid(&SIDAuthWorld, 1,
SECURITY_WORLD_RID,
0, 0, 0, 0, 0, 0, 0,
&pEveryoneSID))
{
printf(“AllocateAndInitializeSid Error %u\n”, GetLastError());
goto Cleanup;
}

// Initialize an EXPLICIT_ACCESS structure for an ACE.
// The ACE will allow Everyone read access to the key.
ZeroMemory(&ea, 2 * sizeof(EXPLICIT_ACCESS));
ea[0].grfAccessPermissions = KEY_READ;
ea[0].grfAccessMode = SET_ACCESS;
ea[0].grfInheritance= NO_INHERITANCE;
ea[0].Trustee.TrusteeForm = TRUSTEE_IS_SID;
ea[0].Trustee.TrusteeType = TRUSTEE_IS_WELL_KNOWN_GROUP;
ea[0].Trustee.ptstrName = (LPTSTR) pEveryoneSID;

// Create a SID for the BUILTIN\Administrators group.
if(! AllocateAndInitializeSid(&SIDAuthNT, 2,
SECURITY_BUILTIN_DOMAIN_RID,
DOMAIN_ALIAS_RID_ADMINS,
0, 0, 0, 0, 0, 0,
&pAdminSID))
{
printf(“AllocateAndInitializeSid Error %u\n”, GetLastError());
goto Cleanup;
}

// Initialize an EXPLICIT_ACCESS structure for an ACE.
// The ACE will allow the Administrators group full access to
// the key.
ea[1].grfAccessPermissions = KEY_ALL_ACCESS;
ea[1].grfAccessMode = SET_ACCESS;
ea[1].grfInheritance= NO_INHERITANCE;
ea[1].Trustee.TrusteeForm = TRUSTEE_IS_SID;
ea[1].Trustee.TrusteeType = TRUSTEE_IS_GROUP;
ea[1].Trustee.ptstrName = (LPTSTR) pAdminSID;

// Create a new ACL that contains the new ACEs.
dwRes = SetEntriesInAcl(2, ea, NULL, &pACL);
if (ERROR_SUCCESS != dwRes)
{
printf(“SetEntriesInAcl Error %u\n”, GetLastError());
goto Cleanup;
}

// Initialize a security descriptor.
pSD = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR,
SECURITY_DESCRIPTOR_MIN_LENGTH);
if (NULL == pSD)
{
printf(“LocalAlloc Error %u\n”, GetLastError());
goto Cleanup;
}

if (!InitializeSecurityDescriptor(pSD,
SECURITY_DESCRIPTOR_REVISION))
{
printf(“InitializeSecurityDescriptor Error %u\n”,
GetLastError());
goto Cleanup;
}

// Add the ACL to the security descriptor.
if (!SetSecurityDescriptorDacl(pSD,
TRUE, // bDaclPresent flag
pACL,
FALSE)) // not a default DACL
{
printf(“SetSecurityDescriptorDacl Error %u\n”,
GetLastError());
goto Cleanup;
}

// Initialize a security attributes structure.
sa.nLength = sizeof (SECURITY_ATTRIBUTES);
sa.lpSecurityDescriptor = pSD;
sa.bInheritHandle = FALSE;

// Use the security attributes to set the security descriptor
// when you create a file.
HANDLE hFile = CreateFile( L”C:\\readAccessDenied.txt”,
GENERIC_READ,//FILE_READ_DATA,
FILE_SHARE_READ | FILE_SHARE_WRITE,
&sa,
CREATE_NEW,
0,
NULL );
CloseHandle(hFile);

Cleanup:

if (pEveryoneSID)
FreeSid(pEveryoneSID);
if (pAdminSID)
FreeSid(pAdminSID);
if (pACL)
LocalFree(pACL);
if (pSD)
LocalFree(pSD);

posted by admin in Testing, c++ and have No Comments

Meego looks promising

Finally Meego has UI to show. It looks pretty interestin.

a. Symbian fonts are finally gone.

b. Looks very much like the iPhone UI

c. Spacious icons.

d. UI development looks easy for developers.

posted by admin in meego and have No Comments

LUA : Method to split a string and output it into a array

First of all i need to give credit to www.wellho.net. I got some code from their website also to implement this.

My basic requirement was to read from the input arguments and display it as a vector of type integers.

Below is the code. Pardon me for the formatting issues. Wordpress sucks when coding:

function string:split(delimiter)
local result = { }
local from  = 1
local delim_from, delim_to = string.find( self, delimiter, from  )
while delim_from do
table.insert( result, string.sub( self, from , delim_from-1 ) )
from  = delim_to + 1
delim_from, delim_to = string.find( self, delimiter, from  )
end
table.insert( result, string.sub( self, from  ) )
return result
end

Then I call the below code from my main method:

have = string.split(inputArgs, “,” )
names= {};
for index,today in pairs(have) do
if today == “1″ then
names[index] = 1;
elseif today == “2″ then
names[index] = 2;
elseif today == “4″ then
names[index] = 4;
end
end

return names; //this returns the vector of integers

posted by admin in c++, lua, programming languages and have No Comments

Displaying a background image in Android

Goto your res folder as shown in image below add a background image.

After adding a background image, goto the main.xml and add the below text:

<ImageView
android:layout_height=”wrap_content”
android:layout_width=”wrap_content”
android:src=”@drawable/background” />

Note: Do not add the extn to the image name, it wont recognize the file and give an error.

Next goto your main class and add the following:

super(context);
// Set the background
this.setBackgroundDrawable(this.getResources().getDrawable(R.drawable.background));

Another way to do this would be:

Resources res = getResources();
Drawable drawable = res.getDrawable(R.drawable.background);

posted by admin in android and have No Comments

lets honor our troops – please check it out

Really good slide show: http://www.cnn.com/SPECIALS/war.casualties/index.html

posted by admin in Uncategorized and have No Comments
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