CODEWITHSUNDEEP
c++windowsfilesavetemp
Ivan Pericic
Ivan Pericic

Reputation: 520

Save file in %temp% folder?

I want to save file in temporary folder which can be easy found when type at run by putting "%temp%", but don't know how to navigate to them from c++.

I try using function like "GetTempPathA" or "GetTempFileNameA()" but they don't return char value. For my purpose I use "SaveToFile" method from "TResourceStream" and need UnicodeString, how to find those information?

Upvotes: 0

Views: 2376

Answers (2)

PiotrBzdrega
PiotrBzdrega

Reputation: 126

One can use also getenv(), but it's deprecated and consider as "non-safe":

#pragma warning(disable:4996) //disable getenv warning

char* p = getenv("TEMP");
std::string path(p);

Upvotes: 0

Cody Gray
Cody Gray

Reputation: 244712

No, neither GetTempPath nor GetTempFileName return a char value. In general, C functions do not ever return strings. Instead, you pass in a string buffer and the length of that string buffer, and the function fills in the string buffer with the requested string.

For example, to call GetTempPath, you would write the following code:

TCHAR szTempPathBuffer[MAX_PATH];
GetTempPath(MAX_PATH,            // length of the buffer
            szTempPathBuffer);   // the buffer to fill

szTempPathBuffer will contain the path to the temporary directory.

Do note that you should probably not be explicitly calling the ANSI functions (those with an A suffix). Windows has been fully Unicode for over a decade now. Either use the macros defined by the Windows headers, which automatically resolve to the correct version of the function depending on whether _UNICODE is defined, or explicitly call the Unicode versions (those with a W suffix).

Since you're calling the ANSI versions, you're getting an ANSI string (composed of char values), rather than a Unicode string (composed of wchar_t values), which is presumably what the SaveToFile method that you're trying to call expects.

Upvotes: 6

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