binaryfiles

Today's problem is that I need to write an array of numbers in a binary file at a starting position. I have the position where it should start, and I don't want to overwrite values after that, just want to insert the array at the starting position in the file. E.g: 12345 Let's push 456 at position 2: 12456345 I know that probably I'll have to implement it by myself, but I want to know what's your opinion on how to implement that as efficiently as possible. Jonathan Leffler Here's a function extend_file_and_insert() that does the job, more or less. #include <sys/stat.h> #include <unistd.h> enum

I'm not a c++ expert but I've serialized things a couple of times in the past. Unfortunately this time I'm trying to serialize a class which contains a std::string, which I understand is pretty much like serializing a pointer. I can write out the class to a file and read it back in again. All int fields are fine but the std::string field gives an "address out of bounds" error, presumably because it points to data which is no longer there. Is there a standard workaround for this? I don't want to go back to char arrays but at least I know they work in this situation. I can provide code if

I was trying to GET a binary data using request , and had something like: var requestSettings = { method: 'GET', url: url, }; request(requestSettings, function(error, response, body) { // Use body as a binary Buffer } But body was always a few bytes different from expected. After further investigation I found out that request assumed body is string and replaced all non-unicode bytes. I tried to add encoding: 'binary' to requestSettings but it didn't help. How can I get the binary data? OK, after a lot of digging, I found out that requestSettings should have: encoding: null And then body will

There seem to be of the order of 10 questions and (mostly) successful answers solving segmentation faults cause by misused fread()'s in C. That being said, I am having such a problem but have not found a solution. I have a binary file containing an int (call it nbins ) and an array of float s (of size nbins ). When I try to read this file, it successfully opens and points to the file handle, but then gives a segmentation fault error when reading the nbins int . Here is a minimal example: #include <stdio.h> #include <stdlib.h> #include <string.h> #define BPATH "/path/to/file" int main(int agrc,