I'm working on a Qt program and when it gets to the following line of code I get a seg fault:
QString blah = QString::fromAscii(entry->d_name, 256);
entry->d_name is a 256 byte character array returned by readdir(), I would expect this line of code to convert that character array from ascii to a QString, but I get a seg fault and I'm not entirely sure why..
I have a very basic program which I wrote, to print the integer equivalents of an ASCII character. The code is below:
Code:
#include<stdio.h>
int main(void)
{
char c;
[code]....
The code is supposed to take a character as input and print the integer equivalent of that character. But the problem is that, after printing the integer equivalent, it prints an extra '10', every time.
Code:
f
102
10
[code].....
Why does this extra '10' always come? When the code is just a simple:
Code:
#include<stdio.h>
int main(void)
{
[code]....
The code works just fine. There is no extra '10' displayed. I am using Ubuntu 9.10 with gcc-4.4.1.
How can I filter ASCII quotes( ' ) and double quotes ( " ) so that I can replace them with the UTF-8 equivalent?If I copy text from a Word Document(ASCII), and upload it to a web page with PHP. The Database(UTF-8) will replace these racters with incorrect character(s).I need some function that will replace these characters but I don't know how to differentiate the ASCII quotes and the UTF-8 Quotes without (somehow) converting the string to hex, then preg_replace'ing the hex code for the symbol.
View 8 Replies View RelatedWell, I have a web application in Linux server. All my Java codes are there. FYI, whenever user entered non-ASCII characters(e.g. ∞,�,�) in a text field in my web application, and I check the log of my Java code in Linux server, it returns weird characters.
Suppose user entered ∞ in the text field. I should get ∞ in my log too. However, I got weird characters in return.
i want to print all ASCII characters kind of like a table, but i really don't have an idea of how to do it, i don't know if there is a built-in method or something to accomplish this, if not
View 2 Replies View RelatedI've got lines of data in the following format:
space1=number of times error has occured
space2=IP address
space3=Error
I've set this out nicely with printf and made it email me, the problem is - it's not entirely clear what each column/space is and the IP and occurances can sometimes seem confusing. Is there any (easy) way to output this into an ascii like table? There will always be 5 occurances, and the format will always be the same
To start off I would like to acknowledge that I am not a very good C programmer and pretty much everything I know has been self taught through mostly trial and error. So forgive me if there is an obvious answer to my question, or if I don't immediately grasp the concepts involved in the possible solution.
Basically, I'm writing an application which will be creating log file entries rather rapidly (potentially hundreds per minute), and I would like each new line to appear at the top of the log file, rather than the end. Opening a text file in append mode is easy enough, but I can't seem to find any obvious way to do the opposite.
I have been looking online and it seems that there exists no standard way to do this, and I have only been able to find a few mentions of how somebody might achieve it. The most common method seems to be using two files and copying the data back and forth between them. This seems like it would be insanely I/O intensive with the number of lines I'm likely to be generating. If this is the best method to use, I will give it a shot; though I am not 100% clear on how to implement it, I am also open to any other ideas as to how to accomplish this, and I don't have to worry about portability since the program already uses Linux-only libraries. So calling out to sed or something is not necessarily out of the question (though I imagine performance would also be an issue there).
To know the function on checking whether a character is ascii or unicode character. From the following [uRL]. The function IsTextUnicode is related to Windows VC++ library. I would like to know the library/function which provides such facility.
View 2 Replies View RelatedI have found a perl script that can convert single file: ascii to hex.
However I have thousand of file that I want to convert from ascii to hex.
Here is the perl script that convert single ascii file to hex in single line:
Quote:
So I would like to read multiple file from a directory.
Then the file will be have same name file with hex data.
Here is sample of the read and write directory file.
Quote:
Dear Advanced c/g++ on boost programers: I have copied and testd a simple (Copy a file with Boost) program from page 372, Example10-10, book(C++ cookbook)
[Code]...
I am writing a code to restore original packet type from encapsulated packet type. However the following error occurred. Below is an extract of my code. Would appreciate if someone could help me explain why the error occurred and how to resolve this.
packet.h
struct hdr_cmn {
packet_t ptype_; // packet type
[code]....
I've just updated my linux system (Debian) and went to compile some code I'm working on. However it causes some problems, presumable because of GCC up dates. I get many of my subject line errors for example
../../common/Version_Control.cpp: In function int VersionControl():
../../common/Version_Control.cpp:55: warning: deprecated conversion from string constant to char*
So I check up the error and it comes from my error handler code which is a function
extern void SetError(char *string,int error_number)
The net tells me all I need to do is convert char *string to const char *string, however when I do so and recompile I get the following error
Error_Control.cpp: In function �void SetError(const char*, int)�:
Error_Control.cpp:41: error: invalid conversion from �const char*� to �char*�
make: *** [Error_Control.o] Error 1
I think I've done exactly what's recommended ?
My problem is that the warning keeps apperaing when I run g++ compilation.
Say, I have a system runtime function with header (imaginary)sysruntime.h: void printfunction(char *line);
Then in my .cpp file, I will include the above header #include <sysruntime.h>
Then, I do the below:
Line12: char *linetoprint = "Print this line";
Line13: printfunction(linetoprint);
But, I will get the warning message "Line12: deprecated conversion from string constant to 'char*'". (Even though it compiles)
My question is how should I declare my char* so that I wont get this warning message, and can still run printfunction(char* line) correctly?
i have written a bash script to convert flv files (e.g. videos) to xvid to be played on my dvd player. the conversion is not really the issue, as it works. what i am dealing with now are 2 problems i have not found a good workarouond:
1. surpressing the shell output of mencoder completely ( i do not want to see all the mencoder messages). this i have only solved to a certain extend.
2. i want to create a progress bar. this one i have not yet cracked.
the script:
code:
#!/bin/bash
## settings
v_bitrate=768
video_opts="-ovc xvid -xvidencopts bitrate=$v_bitrate:autoaspect"
audio_opts="-oac mp3lame -lameopts fast:preset=standard"
store_dir=./converted_files .....
#start the script
main_menu
1. mencoder output: using /dev/null works more or less. for example: if mencoder detects a double frame while converting, a message is still printed on the bash screen
2. progressbar: i have no clue yet on how to do this. any link or tip is welcome.
my goal is something like this:
[56%] [time in progress] [timeleft]
As a result, I want to know what this error means, and how to correct it.Here is my code:
Code:
#include <iostream>
#include <cmath>
#include <cstring>
using namespace std;
[code]....
It is once I use the 'try_crack' function inside of main that I get this error.
I was trying to write a graph plotting program with c++. I need to convert the infix expression from user to postfix expression for quick evaluation. However, the evaluation of postfix is kind of interpreted, and thus kind of slow for evaluating huge number of values. Say if I plot an implicit function the penalty is quite huge. Is there a way that I can compile the infix expression from my running graph plotting application for high speed evaluation.
View 6 Replies View Relatedm getting the following error when trying to compile:Quote:
$ make
g++ -march=athlon64 -O2 -pipe -fomit-frame-pointer -msse3 -c -D_GNU_SOURCE -DPLUGIN_NAME_I18N='"undelete"' -DHAVE_SVDRP -I../../../include undelete.c
[code]...
I am having trouble with the following exception class.
Code:
/**Standard Exception
*
*@description
*@update
*@changes
[code]....
Line 43 points at the snprintf() command.I think the error has to do with the function being virtual and the const after the function definition, however although I have been looking really hard I have not being able to find the reason nor the solution to the problem.
One workaround that I know is moving the block of source withing the virtual function, in the constructor, however having read around (boost library exceptions tutorials) it specifically said that formating of errors messages should not take place withing the construction of objects because we are risking throwing an exceptions and messing up the flow order.
This is weird, and I never noticed before, but now I have an application that is borking on weird things like when /etc/hosts is of one file format or another, and I don't even know the difference between the two (google doesn't tell much either). on CentOS 5.5/5.6 x86_64: a which on the following is an interesting tell:
vi = /bin/vi
vim = /usr/bin/vim
both are actually vim version 7.0.237 but sum differently, and although they are both actually separate executables in the stock installs of CentOS I've been building, on most distros, and older versions of CentOS it seems, vi is usually just a symlink to vim - but again, not in these fresh installs it seems. When I create a file with the 'vi' above, it defaults (usually) to "ASCII text" (but not always) When I create a file with the 'vim' above, it defaults to "ASCII English text" (and causes a particular application I'm working with to bork and barf). It seems the OS is installed by default yielding both file types too, as evidenced by the following:
[Code]...
how i can convert a text to ASCII? >>> ( to encrypt the text ) and how can we use the "hexdump"
View 5 Replies View RelatedHow can I use extended ascii characters, like ALT + 2 + 0 + 0 for instance? I'm using some of those characters for my passwords for online accounts made under MS Windows and it seams I'm unable to use them in Slackware 13. For instance: if I type ALT+2+0+0 in Pidgin there is no character displayed and if I type in the Terminal the same thing, it will replace my shell prompter (sasser@HOSTA:~$) with (arg: 200):
sasser@HOSTA:~$
(arg: 200)
I need to be able to convert a unicode file to ascii using red hat.
View 1 Replies View RelatedWhat do i have to make to be able to watch a movie in a TTY...? there is this library called AAlib, and there is a slackbuild for it, form osuosl [URL], but besides of this I do not know how it is done...
View 11 Replies View RelatedI'm trying to get mplayer to play videos in ASCII, but I get an error... I don't know why. It works fine on my desktop, but my laptop is outputting an error...
This is the command:
Code:
mplayer -vo aa video.flv
This is the error I get:
Quote:
MPlayer SVN-r29800-4.4.2 (C) 2000-2009 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
[Code].....
[URL] under Fedora 14 - Bash:
$ cat asdf | iconv -c -t ASCII
<a href="http://www.net-security.org/secworld.php?id=10607">biometric cabinet lock detects life in the finger</a>
ASDF
$
[Code]...
But theres no iconv under OpenWrt. Are there other working methods to convert a piped ( "|" ) text to only ascii format (under OpenWrt 10.03)?
Say you wanted to write a bash script for "hello world" but the characters were shifted up or down by one.
How would one go about this?
Example:
Code:
Code:
I am working on a project where I am dialing out of a modem!! Old stuff, ya, but the modem allows my device send info from remote sites from my datibase through a phone line so that this IT departments dont have to worry my device being a security issue on their networks.
Any way, the modem I'm using isn't incredibly well designed, and when a certain ascii char is read by the modem, it reads it as an EOF indicator. It is also important that the files I send are compressed.
My question is: Does anyone know of a compression format that allows ME to dissallow IT's use of certain ascii chars?
just as an illustration:
Device --------> Modem ---------> Off-site
and the Modem stops talking to the device when a certain char is passed to it.
I am trying to download a EBCDIC file from z/Os to UNIX using FTP in ASCII mode. The problem I am seeing is; when UNIX FTP Client issues a get; UNIX CPU goes to 100% CPU utilization when transferring a file in ASCII mode. I have done packet traces using wireshark and noted that z/OS Server is translating the file to ASCII before putting it on the wire, however when UNIX FTP Client gets the file I believe that the UNIX FTP Client is again translating the file to ASCII causing the 100% CPU utilization. I need verification that this is what is happening, and is there a way of getting around this other then transferring the file in binary mode then doing a EBCDIC
View 1 Replies View RelatedI just uploaded JPG pics from a Win XP, through shell, on my FTP.When I downloaded them back (to a UNIX machine), they were all currupted and unreadable !After some researches, I found that Win XP's shell works by default in ASCII mode.
View 3 Replies View RelatedI had a problem with the old good ascii/binary FTP transfer modes. I transferred some files (SQL scripting files, in which carriage returns DO matter) using FTP from a windows system to a linux system using filezilla "auto" mode, that should have resulted in ASCII mode for my sql files. These files are well formed and identical to the originals.
Then, someone else picked these files and moved them to another ftp server. I finally found that all <CR><LF> couples have been transformed in <CR><CR><LF>. I guessed that the problem was in the ASCII transfer mode - but, how comes that <CR><LF> => <CR><CR><LF>? I would have rather expected <CR><LF> to become <CR>.