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Getting special folders code question.


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#1 catprog   Members   -  Reputation: 125

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Posted 13 July 2012 - 06:53 AM

I am wondering if this is teh correct way to go about getting the saved game folder and applaction settings for windows.

I have the def for windows in case I want to port it. (core::stringc and irr::io::path are part of the engine so I am not worreied about that)

[source lang="cpp"]#ifdef _WINDOWS#include <windows.h>#include "shlobj.h"#include <stdio.h>core::stringc GetSettingFilePath(){ TCHAR szPath[MAX_PATH]; if(SUCCEEDED(SHGetFolderPath(NULL, CSIDL_LOCAL_APPDATA|CSIDL_FLAG_CREATE, NULL, 0, szPath))){ core::stringc DirectoryPth = ""; DirectoryPth.append(szPath); DirectoryPth.append("\\Costumeverse\\kitsuneWorld.settings"); return DirectoryPth; }}#include <shlobj.h>#define PRODUCT_TITLE TEXT("Costumeverse")#define KF_FLAG_CREATE 0x8000#define KF_FLAG_DONT_VERIFY 0x4000#define KF_FLAG_NO_ALIAS 0x1000#define KF_FLAG_INIT 0x0800#define KF_FLAG_DEFAULT_PATH 0x0400#define KF_FLAG_NOT_PARENT_RELATIVE 0x0200#define KF_FLAG_SIMPLE_IDLIST 0x0100typedef HRESULT (WINAPI *PSHGetKnownFolderPath)(const GUID &rfid, DWORD dwFlags, HANDLE hToken, PWSTR *ppszPath); // free *ppszPath with CoTaskMemFreeirr::io::path getSavePath(){ // Get Save Path TCHAR szPath[MAX_PATH]; if(SUCCEEDED(SHGetFolderPath(NULL, CSIDL_PROFILE|CSIDL_FLAG_CREATE, NULL, 0, szPath))){ core::stringc DirectoryPth = ""; DirectoryPth.append(szPath); DirectoryPth.append("\\Saved Games\\Costumeverse\\"); return DirectoryPth; }}#endif[/source]

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#2 Firestryke31   Members   -  Reputation: 350

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Posted 13 July 2012 - 08:52 AM

It depends on if you're minimum target is Windows XP or Windows Vista/7. I'm going V/7 minimum so my code for the save game is this:
[source lang="cpp"]Ogre::String getSavePath(){ PWSTR path; HRESULT hr = SHGetKnownFolderPath(FOLDERID_SavedGames, NULL, NULL, &path); char newPath[MAX_PATH]; WideCharToMultiByte(CP_UTF8, NULL, path, -1, newPath, MAX_PATH, 0, NULL); Ogre::String result = newPath; result += "/MyCompany/"; result += PRODUCT_TITLE; CoTaskMemFree(path); return result;}[/source]

Ogre::String can probably be converted to core::stringc and += x; to .append(x); without problems. AppData is just the above but with FOLDERID_LocalAppData instead ofFOLDERID_SavedGames. Note that I threw that together quickly so be careful about buffer overflows with WideCharToMultiByte() (though I don't think there will be one, it never hurts to double check). Don't forget to change MyCompany and PRODUCT_TITLE to what they should be. I also use this to build the base path, not the final path, so you might neen to either add a parameter allowing you to append files to the result or add the filename to PRODUCT_TITLE.

Edited by Firestryke31, 13 July 2012 - 08:56 AM.


#3 catprog   Members   -  Reputation: 125

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Posted 13 July 2012 - 06:48 PM

It depends on if you're minimum target is Windows XP or Windows Vista/7. I'm going V/7 minimum so my code for the save game is this:
[source lang="cpp"]Ogre::String getSavePath(){ PWSTR path; HRESULT hr = SHGetKnownFolderPath(FOLDERID_SavedGames, NULL, NULL, &path); char newPath[MAX_PATH]; WideCharToMultiByte(CP_UTF8, NULL, path, -1, newPath, MAX_PATH, 0, NULL); Ogre::String result = newPath; result += "/MyCompany/"; result += PRODUCT_TITLE; CoTaskMemFree(path); return result;}[/source]

Ogre::String can probably be converted to core::stringc and += x; to .append(x); without problems. AppData is just the above but with FOLDERID_LocalAppData instead ofFOLDERID_SavedGames. Note that I threw that together quickly so be careful about buffer overflows with WideCharToMultiByte() (though I don't think there will be one, it never hurts to double check). Don't forget to change MyCompany and PRODUCT_TITLE to what they should be. I also use this to build the base path, not the final path, so you might neen to either add a parameter allowing you to append files to the result or add the filename to PRODUCT_TITLE.


[source lang="cpp"] int sizeRequired= WideCharToMultiByte(CP_UTF8, NULL, path, -1, NULL, 0, 0, NULL); char newPath[sizeRequired]; WideCharToMultiByte(CP_UTF8, NULL, path, -1, newPath, sizeRequired, 0, NULL);[/source]

calling WideCharToMultiByte with a 0 as the 6th paramater gives you the size required.

However I get an error
'FOLDERID_SavedGames' was not declared in this scope as well as
'SHGetKnownFolderPath' was not declared in this scope

I have #include <Shlobj.h> and am using mingw32-g++ as the compiler.

I think I need to install the windows SDK which is what I am doing now.

#4 Firestryke31   Members   -  Reputation: 350

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Posted 14 July 2012 - 02:43 PM

calling WideCharToMultiByte with a 0 as the 6th paramater gives you the size required.


Cool, I did not know that. I have now added that to my code; thanks!

I think I need to install the windows SDK which is what I am doing now.


This is probably the case, I have it installed and forgot about it. Though I would think that if it required the SDK, it would throw an error for the missing header rather than simply an undeclared constant. Perhaps the one that comes with MinGW is outdated...




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