Programming :: Converting Vector Of Bytes To String C++

Mar 4, 2011

I have a vector of octets that needs to be converted to a std string. I'm currently doing it this way:

Code:
stringstream ss;
for (unsigned int i=0; i < data.size(); i++
{
ss << data[i];
}
string s_data = ss.str();

This works, but is there any better way to do it?

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Programming :: Template Algorithm For Std::vector And Std::string?

Sep 8, 2010

I have two functions:

Quote:

void func1(std::string &s)
{
s.clear();
}

[code]....

Is there a way to create one template function for both vector and string that would clear them?

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Programming :: Converting String Sequence Of 1's And 0's Into Their Hexa Sequences

Apr 27, 2011

I have to write a code that converts a sequence of 1's and 0's(block) into their equivalent hexa number and copying to another array(byte). but this sequence is not always of length 8 and you are required to send strlen(sequence)%8 bits back into the string. So i've written down this code and it works well with the sample input but fails in the real program.

Code:
int Convert_encode( char * block,unsigned char * byte)
{
int len,iter,i,j,k,sum;
char * temp=(char *)malloc(4*sizeof(char));
len=strlen(block)/8;

[code]....

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Programming :: Copy String A To String B And Change String B With Toupper() And Count The Chars?

Oct 22, 2010

copy string a to string b and change string b with toupper() and count the chars

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General :: Converting A String To An Shadow Password Format

Apr 15, 2010

I need to manually convert an string ( like with echo ) to a DES crypt format to be inserted inside a /etc/shadow file, does anybody knows how can I do that?

Maybe there are some little tool that could handle that operation, well.. I don't know, hope someone can give me a hint on that.

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Ubuntu :: Error: Allowed Memory Size Of 20971520 Bytes Exhausted (tried To Allocate 7680 Bytes) In /var/www/index.php On Line 2

Jan 9, 2011

I recently had to move to a new machine, everything went well except for one thing. I did fresh installation of LAMP server all with default configs. Every time I'm using PHP script to that invokes include, require or require_once I get the following error:

Code: Fatal error: Allowed memory size of 20971520 bytes exhausted (tried to allocate 7680 bytes) in /var/www/index.php on line 2 index.php file: PHP Code:
<?php    include "index.php";?>
icukapi.php file:
PHP Code:
<?php    echo "test";?>

My memory_limit in php.ini is set to 20M. I tried to increase that however it didn't quite work. PHP seems to allocate all possible space and return that message every time i try. If somebody has an idea of how to fix it I would be more than grateful. I spend quite a long time searching for an answer however the all things i found suggested increating memory_limit which in this case doesn't work.

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Programming :: Out Of Range Vector Iterator?

Mar 20, 2011

I'm not really a C++ noob at all, but I am a little rusty at the moment. Still, I CANNOT figure out what is wrong with the following code. I'm using Visual Studio 2010.

Code: #include <iostream>
#include <fstream>
#include <vector>
#include <string>

[Code]....

I THINK I got all of the pertinent code. Anyway, it fails at the *** line. I CANNOT figure out why. If I modify it to be linein.size()-30, it STILL gives me an error. That makes zero sense.

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Programming :: Implement A Set Class (like In Stl) Using A Vector?

Sep 3, 2010

i need to implement a Set class(like in stl) using a vector.Here is my code that doesnt work corectly:

Code:
#include <iostream>
#include <vector>
template<class T>
class Set
{

[Code]....

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Programming :: Stl Vector As A Member Of A Struct?

Jan 17, 2011

is there any problem that might rise by by having a vector as a member of struct in c++ as follows.ex.

struct A
{
int a;

[code]...

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Programming :: Passing The Char * Vector Argument?

Jun 19, 2010

I am trying to simulate a shell. So what I do is checking of having the parameters from standard input, suc as "/bin/ls -l /home/france/Documents", and then passing them to function execute, which at some point calls execvp(argv[0],argv)The problem is that I don't succeed in using these arguments, while if I call execvp(paramList[0],paramList) it works!!!! Where paramList is exactly what I would put on standard input, but defined statically.

Code:

#include<unistd.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

[code].....

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Programming :: Declaring A Vector Inside A C++ Class?

Mar 23, 2010

Is it not possible to declare a vector inside a C++ class ? Have a look at the following code:

Code:

#include <stdio.h>
#include <iostream>
#include <malloc.h> // malloc
#include <strings.h> // bzero

[code]....

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Programming :: Pthread - Take String From The Command Line And Creates A Thread To Print The String

May 3, 2011

I've been trying to understand pthread in C a little better. So I made a simple program that takes in a string from the command line and creates a thread to print the string. I've looked online and copied the basic concepts but there are something things I'm confused about. The programs works just fine, but I have questions. Here's what I have so far.

[Code]....

One thing I'd like to know is why the 3rd argument in the pthread_create function which is my SendMessage function needs to be typecasted to a void pointer and then send the address of the function. Also as for the 4th argument, I would see typecasting to void pointer in some of the pthread examples I saw online, but in my case I'm passing a char pointer, would this be correct? In which case would I ever want to pass a void pointer?

Do I need a pthread_exit(NULL) in my main and in the SendMessage function? If so, why? I added the sleep() function so that I could let the pthread_exit function in my SendMessage function execute first. I simply saw that the online examples on pthread had pthread_exit() in both locations.

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Programming :: Make A Simple Vector Test But Can't Compile It?

Jun 6, 2010

I am trying to make a simple vector test program, but i can't compile it. Here is the code:

Code:
import java.util.*;
class Vec {
public static void main(String args [ ]) {

[Code]....

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Programming :: Using Sed Replace Line Containing Particular String By A Single String?

Oct 16, 2010

I have a set of lines as ahown below:

Leon went to school
Leon came back from school..
Leon had dinner...

I have to replace the line containing "dinner" by a single string LUNCH...

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Programming :: Creates String Suffixes Out Of A Reference String?

Feb 25, 2011

I need to creates string suffixes out of a Reference string. for eg. suffixes of abcdefg will be

1)bcdefg
2)cdefg
3)defg
and so on...

create an array of pointers to point to the first few characters and then use that pointer to print the rest of the string.But when i print using the pointer i get GARBAGE values! shudn't std::cout<<ptr[w] print the string following the char it is pointing to? why do i get garbage values?

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Programming :: C - Put A Specific Arbitrary Part Of A String Into It's Own String?

Apr 18, 2010

So if I'm given a location of a file like:

How can I just take the type of the file at the end? I know I can use strrchr() for a period to get the pointer to the period just before file type. Is there a build in string function that will just take the rest of the string from a certain point on forward in the string? I know it wouldn't be much work to make it myself, but I figured I would find out if it already existed before doing it.

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Programming :: Convert String To Integer Back To String C++ ?

Mar 13, 2010

Code:

The error is:

Code:

What I want to do is take input of ip4 as a string, convert it to an integer to add 1 to it, then reconvert it back to a string. Its not working.

My full code is:

Code:

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Programming :: ASM - Making A Multimedia Library To Speedup Vector And Matrix Computation

Sep 2, 2010

I'm making a multimedia library to speedup vector and matrix computation. But I'm getting a strange error, in this code

[Code]....

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Programming :: Fill A File With N Bytes Of A Given Value?

Dec 17, 2008

How do i fill a file with <n> bytes at a given value ,for example 3?

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Programming :: Assigning Custom String To Std::string In C++?

Oct 12, 2009

I've been given a custom-made string class which handles string, wstring and bstr. It has a number of methods and assignment operators to convert to and from different types. The app I work on compiles happily in VS6 and VS2008, but when trying to compile in Redhat (version 4.1.1 in Redhat 5.0)

[code]....

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Programming :: How To Check If All Letters Of One String Are In Another String?

Nov 11, 2010

I have the following two type of strings1: A/D2: A/C/DI am trying to write a subroutine to check whether all of the letters in string 1 appears in string 2. If yes, return true. If not, return false. In the above example, all the letters (A and D) in string 1 are also present in string 2, so I return true.

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Programming :: Write Some Code That Involves Creating A Function To Return A Vector Iterator?

Jan 21, 2011

I'm trying to write some code that involves creating a function to return a vector iterator.I'm not sure what is wrong.

Code:
template <typename T> class VectorTemplate
{

[code]....

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Programming :: Read X Bytes From Serial Port?

May 5, 2010

I am trying to write some code that interfaces with an AVR over a serial port. Basically I send a command then read the output which is 6 bytes. I need to receive all 6 bytes before the program continues. Is there a way to do this? If I use read() it returns -1 unless I add a delay before reading the port. Is there a way to get it to read the 6 bytes as soon as they arrive?In python you simply say how many bytes you want and the max time you are willing to wait which seems a whole lot easier than read

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Programming :: Resume Download By Curl Without Mentioning The No. Of Bytes?

May 25, 2011

I am trying to resume an aborted download. I have to use the curl_easy_setopt(hnd, CURLOPT_RESUME_FROM_LARGE,(curl_off_t)no. of bytes to be skipped) to set from where to start resuming download. But in run time, how would i put the no. of bytes to be skipped? Its not possible always to see how much is the size of file downloaded already. So is there any way so that prograjm will automatically know from where to start??

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Programming :: Combine 40 Different Mount Points Into One Bytes Free/used Number?

Feb 18, 2011

We have a program that catalogs to 40 different mount points. The program is fine as long as thier is free space on at least one of the 40 mount points. My boss wants me to come up with a script that will email us daily to know how much overall free space is left. I know I can do a df but I don't know how to combine the 40 mount points into a single disk used/disk free report.

The 40 mount points are /dev/mapper/areaxx, xx being 01 to 40.

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Programming :: Httpmethod Of Httpclient Support Downloading More Than 8192 Bytes?

Apr 15, 2010

Can httpmethod of httpclient support downloading more than 8192 bytes?

If not, any other ways?

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Programming :: Create Large Buffer In Program To Send And Eceive On Another Pc More Than 4096 Bytes

Feb 9, 2011

create a large buffer in my program so that I can send, and then receive on another pc, more than 4096 bytes (this seems to be the default for the serial port). I thought this might work:

[code]...

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Programming :: Convert The Int To A String Using Stringstream Then Convert The String To A Char?

Mar 26, 2011

Do I have the convert the int to a string using stringstream then convert the string to a char? or is there a more direct way?Also is there a way to tell the length of a int?

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Programming :: Converting MB/TB To GB In Perl?

Jan 30, 2010

I am taking an input from the user for free and Used capacity in a disk. I wish to convert Input entered in MBTB to GB and this is how i am doing it.

Code:

<some code>
print "Enter Total disk space";
$tot = <STDIN>;
convert($tot);

[code]...

how do i pass the value of conv[0] after conversion back to $tot or $use such that they contain only value which is in GB?

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Programming :: Error When Converting C To C++?

Jan 22, 2011

I'm working on a project where I am converting a C file to C++. I have worked out 99% of the errors but there is still one lingering one that I cant seem to figure out. I get the following error when compiling with g++

Code:
mscp.cpp:749: error: invalid conversion from const void* to move
mscp.cpp:750: error: invalid conversion from const void* to move

[code]...

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