C++ :: String To Int To Byte?

Aug 16, 2014

Right now im creating a program that use xbox inputs and then send out keyboard functions using sendInput();

It works fine, but now im creating a system wich lets the user of the program change the settings in a textfile. Wich will then change what the controllers bindings are.

example, if settings.txt says: Y=button(0xIE)

i want the program to know that when xbox button Y is pressed, execute a sendInput function to the Key: A (0xIE).

The problem is that the virtual keycode (0xIE) i take from the settings.txt is stored as a string (lets say it is stored in string Y_event)and input.ki.wScan has to be of type BYTE. i made a function wich changes string into int. (because input.ki.wScan seems to be fine getting a int?)

int stringToInt(string insert) {
char back[20];
for(unsigned int e=0;e < insert.length();e++) {
back[e]=insert[e];
} return atoi(back);
}

but when i run the code nothing happend...

In the code i have a function wich executes the keypress: void pressbutton(int key, int time)

when i send in the converted string it doesn't work but when i send in: (0xIE) it works.

pressButton(stringToInt(Y_Event),50) // doesn't work
pressButton(0xIE,50) // works

focus on the last part that i wrote.

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C :: Search A Requested String And Output Into 16 Byte

Mar 20, 2013

So basically here I have a menu in my C program and if I were to select option 2, I would enter a string up to 30 characters and it would output each block of 16 bytes should be shown which contains a character in the requested string. However, when I compile and run the program and search for the string, nothing happens. what I may be doing wrong?

Code:

else if (select == 2){
printf("Enter a string of up to 30 characters: ");
scanf("%s", &userstr);
//Compares both user's string and file string
for (i = 0; i < size; i++){
if (strcmp (buffer, userstr) !=0){

[Code]...

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C# :: Store Each Char Of A String Into Byte-array?

Apr 25, 2014

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:

byteArray[0] = 49
byteArray[1] = 49
byteArray[2] = 48
byteArray[3] = 48

and what i want is

byteArray[0] = 1
byteArray[1] = 1
byteArray[2] = 0
byteArray[3] = 0

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++;
}

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C Sharp :: How To Extract A String From Byte Array

Feb 11, 2014

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 .

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C++ :: Storing A String In Byte-array Form?

Jun 6, 2012

I am trying to use C# with C++, two different applications that work together.

In C# it is easy to get a byte array out of a string, by just using Encoding.Default.GetBytes(of-this-string);

I can pass bytes to my C++ program by just writing in the embedded resources. But this won't allow strings, as far as I know it can only be a byte array. C++ reads the embedded resources a LPBYTE.

So I try to send the string or message in byteform.

However the problem in C++ is that there is no Encoding.Default.GetString(xxx)

Would there be any other ways to send a message/sentence in bytearrayform and request it in C++ back to the original string?

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C++ :: Read Byte Of Char Data And Convert It Into Text String Of Binary Data That Represents Hex Value

Dec 26, 2013

I am writing a program where I need to read a byte of char data and convert it into a text string of binary data that represents the hex value...

i.e. The char byte is 0x42 so I need a string that has 01000010 in it. I've written the following subroutine....

------------- My Subroutine ----------------------------------------------------------------------
void charbytetostring(char input, char *output){
int i, remainder;
char BASE=0x2;
int DIGITS=8;
char digitsArray[3] = "01";

[Code] ....

When I submitted the byte 0x42 to the subroutine, the subroutine returned to the output variable 01000010... Life is good.

The next byte that came in was 0x91. When I submit this to the subroutine I get garbage out.

I am using a debugger and stepped through the subroutine a line at a time. When I feed it 0x42 I get what I expect for all variables at all points in the execution.

When I submit 0x91 When the line remainder = input % BASE; gets executed the remainder variable gets set to 0xFFFF (I expected 1). Also, when the next line gets executed..

input = input / BASE; I get C9 where I expected to get 48.

My question is, are there data limits on what can be used with the mod (%) operator? Or am I doing something more fundamentally incorrect?

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C/C++ :: Converting 8-byte Integer To String Based Integer

Oct 15, 2014

Complete the function myitohex so that its converts 8-byte integer to string based hexadecimals.

Ex: printf("0x%s",myitohex(64,hex)); should printout "0x40" on the screen
char *myitohex(uint8_t i, char *result){
???
return result;
}

I wrote:

#include <stdio.h>
#include <stdint.h>
char *myitohex(uint8_t i, char *result){
*result = i + '0';

[Code] ....

0xp gets printed out which is wrong. I think *result = i + '0'; is wrong. What changes should i do on this row ?

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C++ :: How To Read A Bit From A Byte

Mar 30, 2013

What is the most efficient way to read a bit at a particular position in a byte?

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C++ :: Most Efficient Way To Read A Bit From A Byte?

Mar 30, 2013

What is the most efficient way to read a bit at a particular position in a byte?

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C/C++ :: Returning Byte Value From Memory?

Mar 16, 2014

I'm trying to get the current time for a game and print that to the games chat window. I'm already injected into the process do I don't think I need ReadProcessMemory.

The value i'm trying to read is the game hours 1-12.

//doesn't work
byte time_hour_get ( void )
{
return *( byte *)0x00B70153; //the address to the memory containing the
}

addMessageToChatWindow((char*)time_hour_get); -> when I call this function it looks like s , . I want it to return the integer value like cheat engine. I used byte when scanning for this address

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C :: Byte Ordering In Binary Buffer

Apr 13, 2014

Basically it has to do with the byte ordering in a binary buffer vs the typing of a variable used to hold it.

To give you an example, if I have a buffer (say of indefinite length), and a ptr "ptr" pointing to a byte in the buffer (say, C0), such that if I open the buffer in a binary viewer it reads like this: Code: C0 DD FE 1F Such that this is true:

Code:
/*ptr is uint8_t*/
*ptr == 0xC0

Then I do this:

Code:
uint16_t var;
var = *(ptr+1);

I would expect the result to be:

Code: DD FE /*56830*/

Though if I print that out with:

Code:
printf("%u
", var);

It'll print:

Code: 65245 /*(FE DD)*/

Now obviously it's byte swapped, but what is causing that? I'm assuming if I just stream that out to a file byte by byte it'll be fine, so it's something with the 16 bit data type (also have seen this issue with a 32 bit data type, where all 4 are in reverse order). Is there any way to 'fix' it except bit shifts & masks?

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C :: Locations In The RAM Addressed Per Word Or Per Byte?

Sep 20, 2014

Are locations in the RAM addressed per word or per byte? I am using a 32 bit machine, so I think that it means that on my PC a word would be 4 bytes.

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C# :: Reading A File Into A Byte Array?

Jun 25, 2014

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.

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C# :: Get Posted File From Byte Array

Oct 7, 2014

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?

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C# :: Reading Byte From Serial Ports

Jun 8, 2014

how to use this function:

ftStatus = myFtdiDevice.Read(readData, numBytesAvailable,ref numBytesRead);

to read byte from the serial port.This function is part of the DLL that came with the chip(FT2232D) I am using on my board.I want to use the function to read a byte from the serial port and then send the value to the Graphic user interface.Unfortunately I was unable to get the expected value on my GUI.If I send for instance 40,what I get on the GUI are letters instead of the number 40 or at times the GUI will not even respond.Below are my lines of code I used to read the byte from the serial port:

The following instructions are executed whenever the CHECKBOX is checked

private
void checkBox1_CheckedChanged(object sender, EventArgs e)
{
UInt32 numBytesRead = 0;

[Code].....

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C/C++ :: How To Write Byte In 8051 Correctly

Nov 16, 2012

i have a hex code and need to write it in 8051

if the hex code is
"11 22 33 44 55 66 77 88"
"88 77 66 55 44 33 22 11" (hexadecimal)

but the result is

11 22 33 44 55 66 77 88 FF FF FF FF FF FF FF FF
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

it is should be

11 22 33 44 55 66 77 88 88 77 66 55 44 33 22 11
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF

problem is ...
it can not write second hex code
just only write first hex code

i use serial port , VB6 ,keil C

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C++ :: Binary IO - Read 4 Byte Int From A File

Feb 26, 2012

Trying to write very simple code to read a 4 byte int from a file.

code:

int tester;
FILE *fp;
fp=fopen("/home/bdluser/skeleton.blx","rb");
fread(&tester,sizeof(int),1,fp);
printf("tested 1 byte read should be 1: %i",tester);

I have tried editing the binary file....it outputs similar large numbers

00000000000000000000000000000001 outputs 808464432
0x00000001 outputs 808482864
0x10000000 outputs 808548400
10000000000000000000000000000000 outputs 808464433
x01x00x00x00 outputs 813183068
x00x00x00x01 outputs 813183068 same....

etc.etc. It just keeps returning the same large integers. I thought they were memory addresses but its consistent output/input so I guess not.

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C++ :: Printf With Signed Short / Byte

Jul 17, 2012

I am using print/sprintf with a "%i" format string. Works fine if the input is indeed a 32bit integer. But how can i put in 8/16 bit (ie short & byte) 'integers'? If i just throw them in, they are always taken as unsigned, as the topmost bit/s is/are casted to zero... [URL] ....

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C++ :: Check If Given 8 Byte Is A Valid Double

May 28, 2014

Is there a function in C/C++ that can check if a given 8-byte data block is a valid double value in the valid range?

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C++ :: Byte Array To Double Conversion?

Dec 5, 2014

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;

[code]....

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C++ :: Convert 2-byte Array To Short Int?

Nov 18, 2012

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?

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C++ :: Encoding Byte Array Data?

Apr 23, 2012

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:

Code:
const char * ch_arr = "abcd";
const unsigned int * ui_arr = (const unsigned int*)ch_arr;
cout << ui_arr[0] << endl;
unsigned int ui = 'a';
ui = ui << 8;
ui |= 'b';
ui = ui << 8;
ui |= 'c';
ui = ui << 8;
ui |= 'd';
cout << ui << endl;

I expected both the output lines to be the same, since they contain the same bytes (I believe), but I get:

Code:
1684234849
1633837924

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C++ :: Unwanted Char / Byte When Joining Files

Dec 12, 2014

I wrote the a piece of code to join three files but there is an unwanted char/byte "y" that shouldn't exist but does.

The result is something like
Code: *FILE1**FILE2*y*FILE3*y

Instead of

*FILE1**FILE2**FILE3*

My two questions are: Why is it there, and how can I stop it from appearing.

Code:
ifstream in("Text1.txt", ios::in | ios::binary);
ofstream out("Text3.txt", ios::out | ios::app | ios::binary);
if(in.is_open() && out.is_open()) {
while(!in.eof()) {
out.put(in.get());

[Code] .....

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C :: Unable To Pass Values To Struct As A Byte

Jul 19, 2014

I am using a struct and tying to send values to it as byte value

Code:

#include<stdio.h>
typedef struct{
unsigned r1:1;
unsigned r2:1;
unsigned r3:1;

[Code] ....

Error: invalid suffix "b00100000" or incompatible types in assignment

I am able to access the member as Range.r1 = 1; and have no problems. I want to send data whole at once, but how ?

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C Sharp :: Byte Array To Char Conversion

Jul 26, 2012

- API Function

TestSend(ref char data, ref int len, char slot);
---------------------------------------------------
 Byte[] IccSelect = new Byte[7]{
                              0x00,    
                              0xA4,    // INS 
                              0x04,    //1                              0x00,    //2                              0x0E,    
                              0x31,    
                              0x50,    
                              };  
Int32 len = 20;

TestSend(ref ??, ref len, '0');//byte array to char conversion

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C Sharp :: Convert Multiline Text Box Value Into Byte

Aug 31, 2012

protected void btnUpload_Click(object sender, EventArgs e){
 string pic = ASCIIEncoding.ASCII.GetString(fileUpload1.FileBytes);
 TextBox1.Text = value.ToString();
//Here i get pic[40385]

[Code] ....

On two different event i get two different value which cause file not open due to file corrupted

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