Questions tagged [fwrite]
fwrite stands for file write. It is a function available with PHP, C, C++, etc. for writing the contents of string to the file stream pointed to by handle.
fwrite
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How to get rid of C6387 warning on call to fwrite function?
In Visual Studio 2022, I am getting the following warning when I call fwrite.
Warning image C6387
It says: C6387:'fout' could be '0': this does not adhere to the specification for the function 'fwrite'...
- 3
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Set properties of an exe using Golang
Here's what I have so far:
package main
import (
"os"
"github.com/saferwall/pe"
)
func main(){
exePath, _:= os.Executable()
peFile, _:= pe.New(exePath, &pe.Options{})
...
- 251
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File data is lost during the device power-off and power-on test
When the device was testing power off and on, it was found that the content of a json file was missing. The function to operate it is as follows：
/* 将json写入文件 */
FILE *pf = fopen(file_path,&...
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44
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Malformed gzip file with R {data.table} fwrite
I'm saving a large data.table object as a compressed file using data.table::fwrite(data, 'data.csv.gz'). However, when I try to extract this file using Ubuntu file manager, I get an "empty ...
- 556
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After using the php function fwrite: extra dots inside the file when viewing online (not after downloaded)
I have a function that create a file using the function fwrite.
I've noticed that after the file is created, if I open the file using the online file manager of my host, I can see an extra dot inside ...
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1
answer
70
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Writing UTF-16 directly to stdout with fwrite not doing what's expected
I'm trying to figure out how to write to the console in UTF-16 mode directly (without wprintf) as part of a solution to another problem and wanted to do this directly in C first. Here is an example of ...
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1
answer
66
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Trouble writing/reading struct array in a binary file in C
I am trying to make a program that stores the name, employee number and salary of employees in a database, where I have to then store the amount of employees along with all the information of each ...
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Integer File Not Opening Correctly
I apologize that this is probably a question with a very simple explanation, but I can't seem to find it. I'm currently trying to build a basic database with C. I need to save a structure-linked ...
- 67
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raspberry Pi Pico, writing char array to file on SD Card
I'm using the pico C++ SDK and VS Code on windows 10 pc. I'm simply trying to write to a file on an SD card. The library used is: FatFs - Generic FAT Filesystem Module R0.15 w/patch1.
The code shown ...
- 81
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PHP apache2 - php script cli will write txt file but browser will not
I'm running an Apache2 server (lamp) with PHP8.2 on Raspberry pi5. I have transferred all my code from a previous Pi4b. but installed the lamp server afresh.
I have some simple php script files which ...
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recover.c CS50 blank images
I need help! I keep getting blank images when I run this code. I get all 50 images, so I know I screwed up with either fopen or fwrite, but I have spent hours with google bard and forums to no avail. ...
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Assertion failed - load matrix
typedef struct {
size_t rows;
size_t cols;
size_t stride;
float *es;
} Mat;
Mat t = mat_alloc(img_width*img_height, 3);
Mat mat_alloc(size_t rows, size_t cols)
{
Mat m;
m.rows ...
- 11
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votes
1
answer
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fwrite fails to write full (very large) buffer
I have a very large 8GB array of uint64_t that I need to write to file. For some reason, fwrite() only writes 290MB (exactly 305,131,520 bytes), then simply stops. My program is using a full core of ...
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Laravel9 response()->stream() empty result with fwrite()
I need to export huge amount of data as csv string.
So I tried to use fopen('php://stdout', w) with fwrite($file, $data).
But Laravel response()->stream() do not return anything nor error.
I have ...
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Why is fread being blocked when reading and copying a 0 bytes file?
I have a program that should copy files from one folder to another. But the function that reads the files is being blocked when the file have 0 bytes.
When I do CTRL+C de program continues and copies ...
