fwrite Questions
9
Solved
I have a program that saves many large files >1GB using fwrite It works fine, but unfortunately due to the nature of the data each call to fwrite only writes 1-4bytes. with the result that the writ...
Chiastic asked 27/11, 2012 at 16:7
5
header("Content-Type: application/vnd.ms-excel; charset=utf-8");
header("Content-type: application/x-msexcel; charset=utf-8");
header("Content-Disposition: attachment; filename=abc.xsl");
header("...
9
I am using PHP and fwrite code, but I want every write position to start from the beginning of the file without erasing it's content. I am using this code but it is writing to the end of the file.
...
9
Solved
I am creating a file using php fwrite() and I know all my data is in UTF8 ( I have done extensive testing on this - when saving data to db and outputting on normal webpage all work fine and report ...
4
Solved
Since fwrite() cannot apply encoding argument , how can i export csv file in specific encode as fast as fwrite() ? (fwrite() is the fastest function within my acknowledgement so far)
fwrite(DT,"DT...
2
If I read and write a single file using normal IO APIs, writes are guaranteed to be atomic on a per-block basis. That is, if my write only modifies a single block, the operating system guarantees t...
3
Solved
In the following code, I write messages to a file using bufio in golang. My disk I/O speed is about 1000M/s. Strangely, when the size of the written file is less than 20G, the writing speed is abou...
Sanmicheli asked 18/12, 2017 at 8:47
8
Solved
I'm working on a simple file splitter/merger program in the C programming language. The problem is, for some reason fopen returns NULL, and because of that, my program is crashing at the fwrite sta...
7
Solved
What is the best way to overwrite a specific line in a file? I basically want to search a file for the string '@parsethis' and overwrite the rest of that line with something else.
3
Solved
Sample code:
#include <stdio.h>
#include <unistd.h>
#include <sched.h>
#include <pthread.h>
int
main (int argc, char **argv)
{
unsigned char buffer[128];
char buf[0x400...
2
Solved
Suppose I have the following code:
fid = fopen(my_filename,'w','ieee-le','ISO-8859-1');
fwrite(fid,1,'short',10,'ieee-le')
Then this would open an earlier specified file, skip the first 10 bytes...
2
Solved
I have a text file to read and deal with with 20000 lines. In the text file I want to read the point coordinates and assign to DirectX to render.Snapshot of Text file
I have used std::ifstream, ge...
3
Solved
I'm trying to write a word to a file using this function:
extern void write_int(FILE * out, int num) {
fwrite(&num,sizeof(int),1, out);
if(ferror(out)){
perror(__func__);
exit(EXIT_FAILURE...
Astolat asked 23/4, 2010 at 3:1
5
Solved
With fwrite returning the number of successful elements written to the file, by saying:
if (!(fwrite(...))) {
fprintf(stderr, "Failure");
//perror(???) I sometimes see code that says perror here...
3
Solved
I'm trying to write a Json object (JsonExport) and I'd like to write its content into a text file.
I'm using max4live to export data from Audio DAW to Json in order to export to a server, but afte...
Hartzog asked 18/11, 2015 at 12:36
1
Solved
The source code:
main(void) {
unsigned char tmp[5] = {10, 10, 180, 255, 40};
FILE *ff = fopen("aa.bin", "w");
fwrite(&tmp, sizeof(char), 5, ff);
}
When executed and seeing Hex content of...
2
Solved
I have run into an issue where even when I disable exponential notation, fwrite prints the number in exponential notation. An example:
library(data.table)
options(scipen = 999)
testint = c(500000)...
Malaria asked 2/5, 2018 at 20:38
3
Solved
What is the best way to write to a file some text followed by a data frame? The text is created by pasting variables into strings.
Example desired output:
Here is some text.
This line has a varia...
4
Solved
I have a website where at the same moment, there can be multiple users writing to the same file at the same time. An example of my code is below.
PHP 5.6.20
<?php
$root=realpath($_SERVER["DOCU...
4
Solved
I have the following test script:
<?php
$myFile = "testFile.txt";
$fh = fopen($myFile, 'w') or die("can't open file");
$stringData = "Floppy Jalopy\n";
fwrite($fh, $stringData);
$stringData = ...
Citizenship asked 16/11, 2010 at 15:48
6
Solved
For part of my website I need to be able to write php code to a file with php.
For example:
$filename = "RtestR.php";
$ourFileName =$filename;
$ourFileHandle = fopen($ourFileName, 'w');
$writte...
3
Let's consider the datatable :
> dt=data.table(v1=1:10, v2=c(rep("a",5),rep("b",5)))
v1 v2
1: 1 a
2: 2 a
3: 3 a
4: 4 a
5: 5 a
6: 6 b
7: 7 b
8: 8 b
9: 9 b
10: 10 b
How would I do to ...
Chesnut asked 5/12, 2016 at 3:23
3
I am concerned with the feasibility of this:
On a pre-configured machine I will have a Web-Application pre-installed, next to an Apache-Suite. So client and server are the same!
In this Web-Appli...
Celesta asked 18/7, 2016 at 16:3
3
I have an existing ini file that I have created and I would like to know if there was a way to update a section of the file or do I have have to rewrite the entire file each time?
Here is an examp...
5
I want to write to a text file. When I use substr_replace() in PHP, the encoding changes. It doesn't print Greek Characters correctly. If I don't, everything is fine. How can I fix this?
<?php
...
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