|
The templates may be, but they are not particularly easy to understand. Also OP asked about strstr() under Ubuntu (Linux).
One of these days I'm going to think of a really clever signature.
|
|
|
|
|
And subject says "source code of STL functions" 
Watched code never compiles.
|
|
|
|
|
google "gcc strstr source". lots of hits.
|
|
|
|
|
i don't know that recover source code is very difficult. as said i think i could find decleration or implementation of example strstr but didn't outcome for me.
|
|
|
|
|
Today I developed an application that generate EAN-13 Barcode. around 166 bar code is being generated and printed in two pages.
Now the problem I am seeing is operation is slow and heavy. It Sends 17.24 Mega Bytes of data to printer to print. And the entire process is really slow.
here is the steps to do so:
PrintDlg(...)
StartDoc(...);
StartPage(...);
DrawText(...);EndPage(...);
EndDoc(..);
Now the problem is data is too much for two page.
But even an 8 page mistake print is so fast that it ends printing before I reach to printer to stop. What's wrong with this way? more over is there a better way? or too much ink?
|
|
|
|
|
What perfomance is in case of two pages
and one code-image per page, please ?
They sought it with thimbles, they sought it with care;
They pursued it with forks and hope;
They threatened its life with a railway-share;
They charmed it with smiles and soap.
|
|
|
|
|
Thanks for your time,
In loop I create the image and add it to the page through HDC. Thus it create 168 Barcode is generated. and they are all in two pages only.
Now I am start to think may be the barcode creating process is not fast enough
|
|
|
|
|
Can you reduce the loop down to 1 move per page
and then check the time difference ?
Or trace a page "ready" event by the call of:
::MessageBox(NULL, _T("A page done"), _T("How long ?"), MB_OK);
before ::EndPage(..)
Also, the printer DC could be prepared by "1 bit-per-pixel" bitmap
and maybe by smaller "DPI" value...
They sought it with thimbles, they sought it with care;
They pursued it with forks and hope;
They threatened its life with a railway-share;
They charmed it with smiles and soap.
modified 20-Jul-12 7:45am.
|
|
|
|
|
I already did, it takes 3 munites
|
|
|
|
|
I already rewrite the application. its working better
|
|
|
|
|
Still 17 MBs will be sent ?
They sought it with thimbles, they sought it with care;
They pursued it with forks and hope;
They threatened its life with a railway-share;
They charmed it with smiles and soap.
|
|
|
|
|
I think it would. I didn't check it yet though. But I think it would, but because it creates raw data for printing, and it creates a bit mapped image of 6600x5100 size. but I know that the the data transfer will be faster than the last time
why 6600X5100
This printer is capable of printing 600 points in one inch and I didn't intend to change it.
|
|
|
|
|
Mohibur Rashid wrote: i got an application available in CodeProject.
You should try posting your question in the forum at the end of the article so the author sees it.
One of these days I'm going to think of a really clever signature.
|
|
|
|
|
Thanks for your time,
I should ask this. May be barcode generating process is slow
|
|
|
|
|
Mohibur Rashid wrote: May be barcode generating process is slow
It depends on your code and your printer. I have my own barcode print routine which is fast enough for my purposes.
One of these days I'm going to think of a really clever signature.
|
|
|
|
|
I watched it all. the data transfer is slow. But network is not slow. It actually take time to transfer data. The printer is high performance printer. I need to calculate how much time it takes time to generate single barcode
|
|
|
|
|
Mohibur Rashid wrote: I need to calculate how much time it takes time to generate single barcode
If you mean inside your code then that's easy, just take the time at the start and end of your print process. If you mean from the PC to the printer I do not know of any simple method. Also different printers operate in different ways with regard to when they start printing relative to when the print data arrives.
One of these days I'm going to think of a really clever signature.
|
|
|
|
|
Yeah, the program sucks. I re-write the entire code, took few hours. working fine and fast
|
|
|
|
|
Hi, dear all,
I create a DLL that will apply calculation.
class __declspec(dllexport) Class1{}
class __declspec(dllexport) Class2{}
class __declspec(dllexport) Utility{
static Class1* CreateCase1Obj(){
Class1* obj = new Class1();
return obj; }
}
Other application will use the Utility to get Class1 object as the following:
Class1* obj = Utility::CreateCase1Obj();
The error happens inside CreateCase1Obj() function while call "return obj;" and browser points to dbgheap.c file.
Can anybody tell me what cause this error? Thanks!
|
|
|
|
|
Probably crashing because you're attempting to create a class from code you never imported.
|
|
|
|
|
Thanks for your reply.
In my project's cpp file from where I will call function from DLL, I add the following lines at the file top:
__declspec(dllimport) class Class1;
__declspec(dllimport) class Class2;
__declspec(dllimport) class Utility;
but still get the same error.
|
|
|
|
|
I test the program, the reason for the error is that I pass std::string as argument to Class1 constructor.
Class1(std::string arg1, std::string arg2){
this.ProjDir = arg1.data();
this.ProjName = arg2.data();
}
calling side:
std::string dir = ".....";
std::string name = "....";
Class1 obj = new Class1(dir name);
I test if I call empty constructor, it's fine.
What should I do now? I need to pass these value to Class1.
|
|
|
|
|
Try using the c_str()[^] member function to get the data from the string parameters.
One of these days I'm going to think of a really clever signature.
|
|
|
|
|
Richard, thanks for your suggestion.
Yes, if in the calling side I pass string.c_str() value
string xx = "calling...";
func(xx.c_str());
and in the function definition side I define function as:
func(const char* str){}
everything is fine.
But my project has hundreds functions, it was created in C++ 6.0, now I wish to migrate it to VS2008, if I have to modify all the function definition and modify all the places to function call, that's a big work.
Is there any better way to solve this issue? Thanks!
|
|
|
|
|
I do not know of any simple way other than "Find & Replace in Files" (Ctrl+Shift+H). It's a pity that you created the functions to accept char* parameters rather than string object references, then you would not have had to change in so many places.
[edit]
It is, of course, always possible, that the 'bug' in your code will not be fixed by these changes, but is connected to something else. Make sure that you are actually fixing the right problem before you make all these changes.
[/edit]
One of these days I'm going to think of a really clever signature.
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
