Processing time for the above code takes 9500 to 9900 microseconds (Used QueryPerformanceCounter).
Code:
TempArr[0] = ((BYTE*) pvData) [0];
This code takes 1100 to 1200 microseconds. My doubt is, The processing time of PVOID data into byte array conversion takes time like above? Or any other easy way(PVOID data into byte array conversion) to reduce the processing time?
I'm trying to understand why a conversion from a byte array (unsigned char) to a double works when done one way and not antoher.
In the example code I test by hard coding an unsigned char array of the same bytes that the double consists of.
When I copy the bytes to a long long and cast to double the result is not the original double but if I use a struct the bytes can be set and the conversion happens.
Seems to me that both ways should work. I'd just like to know what is going on with the "struct way" that makes the conversion correct. I see in debugger that the bytes in memory are the same for piAsLong and u.bytes.
My compiler is VS 2012 and a long long and double are both 8 bytes (tested with sizeof). This is learning activity only.
Code: #include "stdafx.h" #include <iostream> #include <iomanip> using namespace std; union { double d;
I have a problem with calculating the CPUtime. I am using CPLEX to solve linear programming with 3 diferent algorithms.
1-primal Simplex 2-Dual Simplex 3-Barrier Method.
When I am trying to use Barrier method, my clock does not give me a right processing time. I don't have any problem with the other two methods. The value I am getting from ticks2 is 0 when I am using Barrier solver unlike the two other methods that I am getting some small values (ticks1 is fine). Using time_t ticks1 , ticks2 and time(&ticks1) and finally difftime(ticks1,ticks2) also gives me an integer number which is not precise enough. I need a way to compute cputime with accuracy of at least 2 decimals.
clock_t ticks1,ticks2; double solvingtime if (solver.primopt==1){ ticks1=clock(); status=CPXprimopt(myEnv, myLP); ticks2=clock();
I want to calculate processing time in milliseconds as most of function I found give me in second. I am new user to C++, the code will be running under linux.
i create a structure called time. Its three members, all type int called hours, minutes, and seconds. This is in 12:59:59 format and i finally want to print out the total number of seconds represented by this time value.
long totalsecs = t1.hours*3600 + t1.minutes*60 + t1.seconds
The error ive been getting with this code is after i go to the check out option, enter the data then click (ctrl + z). Then program glitches back and forth from the menu to the check out option continuously and im not entirely sure why.
Heres my code:
Code: #include <iostream> #include <windows.h> #include <iomanip> #include <fstream> using namespace std; void checkOut(){ cout << setw(10) << "Ministry of Health Hospital System
Is there a way I can do message processing between a Win32 application and Javascript using some Windows CallBack function or using Send or Post message?
I've been having this odd problem when I write a file byte by byte, when I write a byte (dec)10 it adds a (dec)13 in front of it, and as far as I can tell, this is the only byte value that does this.
and most annoyingly, I can't read that (dec)13 with fstream, the only reason I know it's adds it, is because I used an external hex editor.
here is the code that causes the problem:
Code: #include <fstream> using namespace std; int main() {
[Code]...
but the output file reads '0D 0A' (that's in hex, '13 10' in decimal) when viewed in a hex editor. no other number (that I've tried) adds that extra 13.
I'm trying to make OBJ converter. The file structure of which I am trying to convert is an XML structure. Here's an example. I currently have a lua script that does this for me. But it always crashes on big objects. It's for a game called "ROBLOX" The only information I need to convert is.
<int name="BrickColor">194</int> <-- Brick Color <CoordinateFrame name="CFrame"> <-- Position <X>0</X> <Y>0.600000024</Y> <Z>0</Z>
And
Vector3 name="size"> <-- Part size. X>1000</X> Y>1.20000005</Y> Z>1000</Z>
Here's the lua script. [URL] .....
This currently grabs all of the ClassNames in the place and converts them to OBJ wavefront gemotry.
I basically want to create a save editor application that will enable people to alter various values in the save by clicking on releveant buttons and then also for the editor to auto update the checksum when changes are done.
The save file is in hex so from what I can gather I would need to create a button to open the file using 'open file dialogue' and then read the file into a byte array so that the values can be called at any time when a particular butto is pressed and the application will then seek to the point in the file to make the required changes.
I have an application that has its own embedded web server. I am trying to add jQuery/Ajax file upload capabilities to the application however, I am running into issues getting the posted file. The jQuery/Ajax portion is similar to this method here. Due to the way the webserver was written (its in a dll and I do not have access to the source), the posted file comes in as a byte[]. If I try to save the byte array directly to file using:
File.WriteAllBytes("path", ByteArray)
I end up with a corrupt file that I cannot open. I believe this is because the byte array also contains the posted file header info (Content-Disposition, name, filename, etc.). If I view the contents of the byte array using:
System.Text.Encoding.Default.GetString(ByteArray) the header info can be viewed as: ------WebKitFormBoundaryQfPjgEVpjoWgA5JL Content-Disposition: form-data; name="0"; filename="someimage.png" Content-Type: image/png ‰PNG
Based on the selected file size and the size of the byte array, the entire file is in the byte array. How can I go about extracting and saving the posted file from the byte array?
I'm having trouble reading a block of bytes into a vector of short ints. My code is as follows:
Code: FileStream.seekg(2821); vector<short> g_Data; int iter = 0; g_Data.reserve(maxNumOfInts);
[Code] ....
The relevant block of data starts at offset 2821 in the file. Every two bytes are a signed short integer. What's odd is that it's giving me the correct results only part of the time. At offset 1052421 and 1052422 there are two bytes 40 and 1F that are correctly read in as 8000, but at offset 1052415 and 1052416 bytes 88 and 13 are read in as -120 instead of 5000.
I don't see anything wrong with my code, though, unless I'm misunderstanding completely how to convert an array of two bytes into a single float. Is my method correct? Better still, is there some way to just convert en mass an array of bytes into a vector of signed short ints?
I'm trying to parse some binary data in the form of an array of bytes and I've come across something that is confusing me related to the representation of data as chars versus ints. It's a bit of a long story, but the byte array contains a mixture of character data and integer data which I' having trouble unravelling. The problem seems to arise from the issue below:
I have a problem in using ATL 7.0 string conversion macros.
My codes looks like this, which uses ATL 3.0 string conversion macros in the past:
Void Myfunc() { USES_CONVERSION;
LPSTR lpszA; LPWSTR lpszW; If (...) { CString strText; If (...) { If (bUnicode)
[Code]...
But since 3.0 macros do not support large strings, I want to switch to 7.0 macros, but have problems. Based on the [URL]... samples, I should declare CT2A pszA(strText) or CT2W pszW(strText) within the if and else bodies, as below:
However, in such a case, after running to the codes using lpszA or lpszW, both CT2A and CT2W will be destructed so lpszA and lpszW will be invalid. How to solve this problem?
I am trying to store each char of a string(string a ="1100") into a byteArray ( byte[] byteArray = new byte[4]. its not showing any error but its storing like below:
I don't know why but its replacing 1 with 49 and 0 with 48.what am I doing wrong or how to do this?
my code is as below
byte[] byteArray = new byte[4];)/> int binArrayAdd = 0; string a ="1100"; foreach (char Character in a) { byteArray [binArrayAdd] = Convert.ToByte(Character); binArrayAdd++; }
i need to search for a keyword in a binary(.raw)file and have to extract the characters(until a '&' character is found)that immediately following the keyword .
In my application there is a structure that holds 200 parameters for 200 tests. These structure is converted to byte array . I want to write this byte array to a file in save button and when I click open button, this file must open and write these bytes to corresponding text boxes. How it possible.?
