[solv]how to reserve an extra space at the end of a string?

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Index > High Level Languages > [solv]how to reserve an extra space at the end of a string?

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vivik

Joined: 29 Oct 2016
Posts: 671

vivik 24 Feb 2018, 08:32

Something like this:

wchar_t* filename = L"C:\\folder1\\folder2\\folder3\\",0,0,0,0,0,0,0,0;

I need to reserve space for 16 more characters, how? I can just write another 16 characters of whatever, but I'd prefer them to be 0.

Last edited by vivik on 25 Feb 2018, 06:17; edited 1 time in total

24 Feb 2018, 08:32

alexfru

Joined: 23 Mar 2014
Posts: 80

alexfru 24 Feb 2018, 09:15

"...\0\0\0"
Or if you use an array, making it big enough will work:
wchar_t filename[100] = L"C:\\folder1\\folder2\\folder3\\";

24 Feb 2018, 09:15

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20700
Location: In your JS exploiting you and your system

revolution 24 Feb 2018, 09:40

Use the constants that come with your OS. For Windows:

Code:

wchar_t filename[MAX_PATH] = L"C:\\folder1\\folder2\\folder3\\";

There is no sense using more than MAX_PATH since the OS won't be able to use it. And always check that whatever you add to the buffer won't overflow it past MAX_PATH. It can cause some terrible bugs if you assume that your path length + 16 characters will never overflow past MAX_PATH.

24 Feb 2018, 09:40

vivik

Joined: 29 Oct 2016
Posts: 671

vivik 24 Feb 2018, 13:54

It looks like this string ends up read-only. Can I make it writable? Compiler is VS2005.

I guess I'll just copy it somewhere for now, it's not important.

24 Feb 2018, 13:54

shoorick

Joined: 25 Feb 2005
Posts: 1614
Location: Ukraine

shoorick 24 Feb 2018, 15:00

MAX_PATH may appear short for UNICODE functions. It is not bad to read this to clarify the subject.

24 Feb 2018, 15:00

rugxulo

Joined: 09 Aug 2005
Posts: 2341
Location: Usono (aka, USA)

rugxulo 24 Feb 2018, 22:30

vivik wrote:

It looks like this string ends up read-only. Can I make it writable? Compiler is VS2005.

readonly wrote:

wchar_t* filename = L"C:\\folder1\\folder2\\folder3\\",0,0,0,0,0,0,0,0;

writeable? wrote:

wchar_t filename[100] = L"C:\\folder1\\folder2\\folder3\\";

24 Feb 2018, 22:30

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