Click here to Skip to main content
15,796,456 members
Home / Discussions / C / C++ / MFC
   

C / C++ / MFC

 
PinnedHOW TO ANSWER A QUESTION PinPopular
Chris Maunder12-Jul-09 23:37
cofounderChris Maunder12-Jul-09 23:37 
PinnedHOW TO ASK A QUESTION PinPopular
Chris Maunder12-Feb-09 18:19
cofounderChris Maunder12-Feb-09 18:19 
Questiondownload a web page Pin
mike741117hrs 35mins ago
mike741117hrs 35mins ago 
AnswerRe: download a web page Pin
Mircea Neacsu17hrs 5mins ago
Mircea Neacsu17hrs 5mins ago 
GeneralRe: download a web page Pin
mike74118hrs 37mins ago
mike74118hrs 37mins ago 
GeneralRe: download a web page Pin
Mircea Neacsu7hrs 47mins ago
Mircea Neacsu7hrs 47mins ago 
AnswerRe: download a web page Pin
jschell15hrs 13mins ago
jschell15hrs 13mins ago 
AnswerRe: download a web page Pin
Gerry Schmitz14hrs 37mins ago
mveGerry Schmitz14hrs 37mins ago 
Questioncopying a file in C++17 Pin
mike74115-Dec-23 22:36
mike74115-Dec-23 22:36 
AnswerRe: copying a file in C++17 Pin
Richard MacCutchan23hrs 58mins ago
mveRichard MacCutchan23hrs 58mins ago 
AnswerRe: copying a file in C++17 Pin
jschell15hrs 1 min ago
jschell15hrs 1 min ago 
mike7411 wrote:
Is this a good way of doing it?


1. You want to check what happens if different drives are involved.
2. You want to verify paths are supported.
3. Catching one type of exception ignores possible other ones. Probably unlikely but in case.


mike7411 wrote:
buffer sizes are being used behind the scenes?


There are all sorts of possible buffers. Disk, OS, library.

Only concern however for that is speed. You can profile it. You can also use a OS command shell call for comparison.

If it matters, at least in my experience, OS shell commands will always be faster. This is especially true when copying directories. Seems reasonable given that the copy operation in the OS doesn't involve loading the data into the application.

Even so if you need it to be 'fast' for some reason then I would suggest that you need to change your requirements/design. Copying files, in general, is always 'slow'. Speed doesn't matter for single small files. So only matters for very large files and/or large numbers of files. But those will always be 'slow'. And there can be error conditions that make it even slower (which your code does not account for.) So attempting to guarantee a speed rate is never going to work.
Questionprintf without stdio.h Pin
mike74115-Dec-23 6:21
mike74115-Dec-23 6:21 
AnswerRe: printf without stdio.h Pin
Mircea Neacsu5-Dec-23 6:31
Mircea Neacsu5-Dec-23 6:31 
GeneralRe: printf without stdio.h Pin
mike74115-Dec-23 17:23
mike74115-Dec-23 17:23 
GeneralRe: printf without stdio.h Pin
Mircea Neacsu5-Dec-23 17:42
Mircea Neacsu5-Dec-23 17:42 
AnswerRe: printf without stdio.h Pin
Victor Nijegorodov5-Dec-23 6:32
Victor Nijegorodov5-Dec-23 6:32 
AnswerRe: printf without stdio.h Pin
k50545-Dec-23 7:02
mvek50545-Dec-23 7:02 
GeneralRe: printf without stdio.h Pin
jschell14hrs 58mins ago
jschell14hrs 58mins ago 
Questioncopying a file Pin
mike74115-Dec-23 4:24
mike74115-Dec-23 4:24 
AnswerRe: copying a file Pin
Mircea Neacsu5-Dec-23 4:32
Mircea Neacsu5-Dec-23 4:32 
AnswerRe: copying a file Pin
Richard MacCutchan5-Dec-23 5:05
mveRichard MacCutchan5-Dec-23 5:05 
AnswerRe: copying a file Pin
k50545-Dec-23 5:42
mvek50545-Dec-23 5:42 
QuestionMyth of a Myth? Pin
jschell4-Dec-23 4:38
jschell4-Dec-23 4:38 
AnswerRe: Myth of a Myth? Pin
Richard MacCutchan4-Dec-23 5:57
mveRichard MacCutchan4-Dec-23 5:57 
AnswerRe: Myth of a Myth? Pin
Mircea Neacsu4-Dec-23 6:05
Mircea Neacsu4-Dec-23 6:05 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Praise Praise    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.