C++ :: Read Binary File With Line Delimiter?

Oct 3, 2013

I want to read a binary file using as line separator "ff77" in order to parse further each line one by one with some regex since the file is big. I have a small ruby code shown below, but I'm new in C++, and I don't know how to replicate in C++ what this ruby code does.

Code:
#!/usr/bin/env ruby
BEGIN{ $/="xffx77" } # Line separator = FF77
File.open(ARGV[0],"rb") # Open in binary mode

[Code].....

View 14 Replies


ADVERTISEMENT

C++ :: Read Binary File With Line Delimiter

Nov 2, 2013

I run with debugger and appear this file referring the error to line 142 (in red):

Code:
/***
*xtoa.c - convert integers/longs to ASCII string
*
* The module has code to convert integers/longs to ASCII strings. See
*
*******************************************************************************/

#include <cruntime.h>
#include <stdlib.h>
#include <limits.h>
#include <tchar.h>
#include <internal.h>
#include <internal_securecrt.h>
#ifdef _UNICODE
#define xtox_s xtow_s

[Code] ...
In the calls stack window appears this

Code:
=>msvcr110d.dll!xtoa_s(unsigned long val, char * buf, unsigned int sizeInTChars, unsigned int radix, int is_neg) Line 142C
msvcr110d.dll!_itoa_s(int val, char * buf, unsigned int sizeInTChars, int radix) Line 176C
Get_Blocks.exe!main(int argc, char * * argv) Line 224C++
Get_Blocks.exe!__tmainCRTStartup() Line 536C
Get_Blocks.exe!mainCRTStartup() Line 377C
kernel32.dll!7695336a()Unknown

[Frames below may be incorrect and/or missing, no symbols loaded for kernel32.dll]
ntdll.dll!76f19f72()Unknown
ntdll.dll!76f19f45()Unknown

It seems could be becuase to _itoa_s(), I'm using like this:

Code:
_itoa_s(CONVDEC(i), num, 10, 10);
sub += num;

View 5 Replies View Related

C/C++ :: Reading In A Text File With New Line Delimiter?

Feb 23, 2014

I have attached the file that I need to read into a data structure. In the example I am just printing it to the screen. This following code has worked for me before, but now isn't. I have tried in visual studios, and on unix, and neither are running it. I ultimately need it to run on unix.

Example file:

word
book
programming

Here is my function to read in the file.

ifstream file;
string line;
file.open("words.txt");
if(file.is_open()){
while(!file.eof()){
getline(file, line);
cout << line <<endl;
}
}
file.close();

View 7 Replies View Related

C++ :: Read Line By Line From Text File To String

Jul 5, 2013

I have a text file (test.txt) with the following data:

01,05,25,20130728
01,06,25,20130728
01,07,25,20130728
01,08,25,20130728
01,05,25,20130728
01,05,25,20130728
01,05,45,20130728
01,05,65,20130728
01,05,85,20130728
01,05,35,20130728
01,05,25,20130728
01,05,35,20130728

I want to read this to one string called line. So far I have this code:

string line;
ifstream myfile ("/home/Test.txt");
if (myfile.is_open()) {
while (myfile.good()) {
getline (myfile, line);
for (int a = 0; a <= 335; a++) {
cout <<line.at(a);
} }
myfile.close();
}

so far its only printing the first line and then throwing an instance of 'std::out_of_range'

View 2 Replies View Related

C++ :: Read Txt File Line By Line Write To Vector

Oct 5, 2013

I need to read a text file which has various lines containing integers. I need to write those integers separately in a vector. Example, the first line of the text file contains 3 9 8 7 6 so vector[4]=3, vector[3]=9, vector[2]=8 and so on. Next read the second line 4 1 2 3 4 5 and write to another vector vector[5]=4, vector[4]=1...

I tried the code below but it will write from the second line, the whole line in one vector index.

int str; // Temp string to
cout << "Read from a file!" << endl;
ifstream fin("functions.txt"); // Open it up!
string line;
// read line count from file; assuming it's the first line
getline( fin, line );

[Code]...

View 1 Replies View Related

C++ :: How To Read Data From A File Line By Line

Jul 2, 2013

I have an external file with one column of data. If I have a counter value let say counter =1, and counter++ and so on. How I can write such a c++ code that if the value of counter and value from the external file are same then generate an action let say cout both values i.e. value of counter and value from external file.

for more information, here is an example:

data in file(in one column): 2 6 8 9 10...
value of counter : 1 2 3 4 5 6 7 8 9...

then cout values only if value of counter and value from the file is same.

Here is my code so far, but it does not seem to work;

#include<iostream>
#include<fstream>
using namespace std;
int main() {
const int SIZE = 10; //Size declaration of array
int hours[SIZE]; //Array declaration

[Code]...

View 12 Replies View Related

C++ :: Read File Content Line By Line

Jan 23, 2015

I am reading my file (20GB) line by line using boost like this

PHP Code:

boost::interprocess::file_mapping* fm = new boost::interprocess::file_mapping("E:Mountain.7z", boost::interprocess::read_only);
boost::interprocess::mapped_region* mr = new boost::interprocess::mapped_region(*fm, boost::interprocess::read_only);

 char* bytes = static_cast<char*>(mr->get_address()); 

An exception is thrown in the second line while allocating memory for mr.

I use boost because it can also work in Mac which my code will be ported to.

View 3 Replies View Related

C :: How To Read End Of The Line In TXT Or DAT File

Nov 19, 2013

How do i read the end of the line in a txt or dat file? I treid using fscanf in a while loop like this

Code:

while(fscanf(pfile,"%c") != EOF && fscanf(pfile,"%c") != '') {
char c = ' ';
fscanf(pfile,"%c",&c);
str += c;
}

The reason why its important to stop after each line is that i need the program to read the data from each line separately.

View 2 Replies View Related

C++ :: Read From A Txt File And Then Write A New Text File With Sorted Line

Jun 11, 2014

I have a .txt file which I want to read from and then write a new text file, this time with sorted lines. It is easy to sort one value, but what about sorting entire lines based on one value?

I want to sort the lines based on the FIRST value.

Example text file contents:

values;data
5.01 100
2.9 342
2.69 43534
10.1 43
6.8 45324

Output: Text file containing

2.69 43534
2.9 342
5.01 100
6.8 45324
10.1 43

It's easy to do this if there was only 1 number on each line, but I do I sort all the lines based on the first number in each line?

View 2 Replies View Related

C :: Program Not Read The First Line Of File

Dec 2, 2013

I have been working on a program to scanfile and whenever it encounters what the user wanted it prints it, and it is all right less the first line of the file that the program jumps,

Code:

#include<stdio.h>#include<string.h>
#include<stdlib.h>
void main()
{
unsigned int j=0 ;
char num[100] , str1[100], str2[100];
FILE *fp;

[Code]....

View 3 Replies View Related

C++ :: Read Last Line Text File?

Aug 16, 2013

I am making a script to read the latest from a text file. It picks up the line by numbytes in fseek, but the data line may vary and numbytes not be accurate, how can I fix this?

And another problem is that the line has, date, time, value, separated by space, how to read that line and put these 3 information in variable?

#include <stdio.h>
#include <conio.h>
int main() {
FILE *arq;
char Line[100];
char *result;
int tam, i;
// Opens a file for READING TEXT
arq = fopen("temp.txt", "rt");

[code].....

View 19 Replies View Related

C++ :: File Read / Find - Miss 1st Line In File

May 3, 2013

I wrote the below code to find the line with "abc" as my parameter to strTosearch. I expected to the line 1st line but, this function always match the 2nd line. What am I missing here?

I wanted "found" to be "abc def hgi SSS".

Code in main()
String found=GetstringColSamLine("mytext.txt", "abc");

File name - mytext.txt
abc def hgi SSS
abc ppp yyy
string GetstringColSamLine(string routerFileName, string strTosearch)

[Code] ....

View 3 Replies View Related

C/C++ :: Read A Line With 8 Bytes Of Data From A File

Jul 23, 2012

How to read a line with maximum of 8 bytes from a line in a file.

Let say line has 10248 bytes in one single line and same repeats for remaining lines in the file.

I need to read the first 8 bytes of a line and go on read the last 2 bytes of the line and repeat the till end of file.

View 3 Replies View Related

C :: How Can A Multi-line String Be Read Line By Line

Mar 7, 2014

How can a mulitline string be read line by line

ex: str = "PERIOD="week"
DAY="day"
TIME="time"";

View 2 Replies View Related

C++ :: How To Read Binary Img File

Nov 24, 2014

When reading a binary .img why is it when you read it by slurping in the file, then save it to a string and cout, you don't see the binary but random garbage?

View 11 Replies View Related

C++ :: Read Text File To Stringstream But Keep Line Feed

Jun 6, 2013

I build this function in my C++ code. I run the on a UNIX box, build HTML file to use in Windows.

In HTML file building code, I have only a string variable hold the contents of this text file (from unix) & add it into HTML file.

The issue is that when I view the HTML file on windows, it shows all the lines in the text file as one line. I think it lost the CRLF.

My question is when I add lines from text file (reading one line at a time) in UNIX, how do I maintain CRLF ( ) in the stringstream variable so that it will display on HTML in Windows properly, all the lines as it is in unix.

I am aware UNIX uses for line end.

string TextFileToString(string filename) {
string line;
stringstream dosString;
ifstream inFile;

[Code] ......

View 4 Replies View Related

C++ :: Read Text File - First Line Has Extra Char

May 21, 2012

When I read a text file. I'm reading a list of strings in text file, with one string per line. The first line has extra characters in the string, the rest of the lines read are fine, and I can't understand where the extra characters come from. The file format is this...

A
AA
AAN
AAP
AAPL
AAWW
AAXJ
....
...

Code:
std::vector<std::string> strSymbolList;
std::string s = "";
std::ifstream infile( m_strFileSymbols );
while( std::getline(infile, s) ) {
strSymbolList.push_back(s);
}
infile.close();

View 3 Replies View Related

C++ :: Read From Txt File One Bit At A Time And Then Write Into Binary File

Apr 22, 2013

I am trying to get the code to read from the txt file one bite at a time and then write this bite into the binary file but i cant seem to get it working.

FILE *fpcust, *fpcustbin; //<<<<<-----point to both sales and customers text files, and the new .bin files for both
char buffer;
int ch;
int ch1;
fpcust = fopen("c:customers.txt", "r"); //<<<<-----pointing to the file
fpcustbin = fopen("c:customers.bin", "wb"); //<<<<<-----pointing to the new binary file, opening in writing binary

[Code]...

View 3 Replies View Related

C :: Read Doubles From A Binary File

May 6, 2014

I use the following function to read doubles from a binary file:

Code:

int64_t read_current(FILE *input, double *current, uint64_t position, uint64_t length)
{
printf("asked for %" PRIu64" samples
",length);
printf("reading from %" PRIu64 " to %" PRIu64 "
",position,position+length);
union{
double d;
uint64_t i;
}

[code]...

As long as position+length doesn't exceed the end of the file, all is well. However, if it does, weird things start to happen. In particular, the apparent length of the file (that is, the value of "read" after the function has finished) becomes dependent on "length"). I know that "position" is never past the end of the file.

View 12 Replies View Related

C++ :: How To Read Struct From Binary File

Oct 12, 2014

I have this file want to read it source code [URL] ....

View 10 Replies View Related

C/C++ :: Best Way To Read One Bit At A Time From A Binary File?

Nov 9, 2013

I'm trying to do file compression/decompression in C and I need to handle one bit at a time.

I currently try to do:

unsigned char byte = fgetc(fptr);

and later

byte >>= 1;

but the problem is that I have to use the first bit of the byte and then treat the next 8 bits as one byte. The byte usage keeps shifting over in this way. It's probably quite clear that I'm a bit lost.

View 1 Replies View Related

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.

View 2 Replies View Related

C :: Read Txt File And Print Contents Numbering Each New Line Of Text?

Apr 25, 2013

I have written the following code but i am stuck. Write a program that will prompt the user for a file name and open that file for reading. Print out all the information in the file, numbering each new line of text.

Code:
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <ctype.h>
int main()
{
char line[81], filename[21], c;
int i = 1;
FILE *inFile;

[code]....

View 3 Replies View Related

C++ :: Read In Binary Files Then Write To Another File

Oct 11, 2014

I would like to read in binary files, then write them to another file.

I write a code, what works perfectly, if I would like to just copy the file to another. But I want to make it a little other.

If I open a file in hex-editor I also can see the ASCII values. But I would like get the ONLY the hex values to the other file.

For example:

d5 57 4f ad 30 33 0b 4e 49 a7 05 18 c4 90 66 d8 45 ac 39 3e 7d f1 a8 02 80
14 20 90 6e 20 12 38 0c 65 4a 28 d2 80 72 04 20 a9 4a 82 84 60 6a 0b 25
59 4c 30 c8 69 c0 ec fa 36 ed 3a da b1 9a 82 02 e0 bb 7e 41 87 02 f6 10 34
eb 95 93 63 01 6b 8d e1 d7 43 c3 df 92 5d 8a ed 57 61 4e 36 07 2a d7 56 2b
b5 0e 55 83 b4 76 8c b7 61 77 0e c9 76 0c 81 1b 01 63 0c 8b 73 57 d5 6d 4c
0c c2 0d 52 45 18

How could I make it?

View 4 Replies View Related

C# :: Open And Read CSV File One Line At A Time Using SQL Commands - OleDb Exception

Apr 7, 2010

The objective: Open and read a CSV file one line at a time using SQL commands.

The problem: I am getting an error that I have a feeling may not point to the "real" problem.

Where I may have syntax or other errors in code.

stInputConn = "Provider=Microsoft.jet.OLEDB.4.0;Data Source=V:\IT\RE\Exports\;Extended Properties="text;HDR=YES;Format=Delimited(,)"";
OleDbConnection cn = new OleDbConnection(stInputConn);
stInputFileName = ConfigurationManager.AppSettings.Get("InputFile");
// the input file name is CSV_DataExport.CSV

[Code] .....

The last line (ExecuteReader) is where I get the OleDb Exception.

View 9 Replies View Related

C :: Write / Read Tree Nodes Into A Binary File

Oct 20, 2013

I have a binary tree, and I want to store all information its leaves stores into a binary file and then read it.

What I tried:

A function that reads the tree, and whenever it finds a leaf, it writes in the binary file:

Code:
[...]
if(tree->right == NULL && tree->left == NULL){
fwrite(tree, sizeof(tree), 1, output);
}
[...] a

And in the main function:

Code:
[...]
for(i=0;i<5;i++){
fread(tree, sizeof(tree), 1, output);
printf("This is the leaf number %d", tree->num);
}
[...]

I'm trying to read 5 nodes just to see if its working but it isn't. The output shows the first node of the tree everytime.

View 2 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved