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by: franky.backeljauw |
last post by:
Hello,
following my question on "std::copy versus pointer copy versus member
copy", I had some doubts on the function memcpy, as was used by tom_usenet
in his reply.
- Is this a c++ standard library function? That is, can I be sure that
every c++ standard library has this function? Or is there a c++
alternative to it?
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by: Delali Dzirasa |
last post by:
I would have a number packed with its hex representation of the integer
below is some sample code of what is being done.
int value = 20; //in hex it is 0x14
AddData (value);
..
..
..
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by: Samee Zahur |
last post by:
Hi all,
I'm a little confused - my guess is memcpy is no longer (or perhaps
never was) a standard c++ function, since it has very little type check
into it - and can potentially create havoc for user-defined types. Now
my confusion is here - a simple instantiation of the standard copy
algorithm can be quite slow compared to the older memcpy for obvious
reasons - specially for a large array of built-in types like int or
something; so do...
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by: manya |
last post by:
Ok, it's been a while since I've done the whole memcpy stuff with C++
and I'm having a hard time remembering everything.
I hope, however, that you can help me with my problem.
I memcpy a struct into a buffer to put it into a database (BerkeleyDB,
to be specific) - what do I do to memcpy the thing back?
Code Example:
//struct I want to work with
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by: Christopher Benson-Manica |
last post by:
(if this is a FAQ or in K&R2, I didn't find it)
What parameters (if any) may be 0 or NULL? IOW, which of the following
statements are guaranteed to produce well-defined behavior?
char src;
char dst;
memcpy( dst, src, 1 );
memcpy( NULL, src, 1 );
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by: Amarendra GODBOLE |
last post by:
Hi,
I am a bit confused over the correct usage of memcpy(). Kindly help me
clear the confusion.
The linux manpage for memcpy(3) gives me the following prototype of
memcpy(3):
#include <string.h>
void *memcpy(void *dest, const void *src, size_t n);
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by: Case |
last post by:
#define SIZE 100
#define USE_MEMCPY
int main(void)
{
char a;
char b;
int n;
/* code 'filling' a */
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by: myhotline |
last post by:
hi all
im very confused about using memcpy and i have three
questions....memcpy takes a pointer to src and a pointer to dest and
copies src to destination...but im very confuzed about when to use '&'
operator while using memcpy....i have code that use '&' and the code
that call memcpy without '&'
like is the following same
Quest1
---
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by: Mark |
last post by:
Hi List,
I want to write a function to copy some data out of a hardware buffer.
The hardware can change the contents of this buffer without it being
written to by my function. I want to use memcpy to unload the data.
Do I need to specify the source data as volatile in this case?
What is the correct syntax for specifying that the data pointed to by
the source pointer is volatile and not the pointer itself?
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by: sam |
last post by:
(newbie)Technically what's the difference between memset() and
memcpy() functions?
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by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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