include/SDL_test_log.h
author David Ludwig <dludwig@pobox.com>
Sat, 29 Nov 2014 10:09:30 -0500
changeset 9247 eddb899239fe
parent 8820 0e935d5b193a
child 9619 b94b6d0bff0f
permissions -rw-r--r--
WinRT: bug and data-integrity fixes for SDL_GetPrefPath()

This change does a few things, all with regards to the WinRT implementation of
SDL_GetPrefPath():

1. it fixes a bug whereby SDL_GetPrefPath() did not create the directory it
returned. On other SDL platforms, SDL_GetPrefPath() will create separate
directories for its 'org' and 'app' folders. Without this, attempts to create
files in the pref-path would fail, unless those directories were first created
by the app, or by some other library the app used. This change makes sure
that these directories get created, before SDL_GetPrefPath() returns to its
caller(s).


2. it defaults to having SDL_GetPrefPath() return a WinRT 'Local' folder
on all platforms. Previously, for Windows Store apps, it would have used a
different, 'Roaming' folder. Files in Roaming folders can be automatically,
and synchronized across multiple devices by Windows. This synchronization can
happen while the app runs, with new files being copied into a running app's
pref-path. Unless an app is specifically designed to handle this scenario,
there is a chance that save-data could be overwritten in unwanted or
unexpected ways.

The default is now to use a Local folder, which does not get synchronized, and
which is arguably a bit safer to use. Apps that wish to use Roaming folders
can do so by setting SDL_HINT_WINRT_PREF_PATH_ROOT to "roaming", however it
is recommended that one first read Microsoft's documentation for Roaming
files, a link to which is provided in README-winrt.md.

To preserve older pref-path selection behavior (found in SDL 2.0.3, as well as
many pre-2.0.4 versions of SDL from hg.libsdl.org), which uses a Roaming path
in Windows Store apps, and a Local path in Windows Phone, set
SDL_HINT_WINRT_PREF_PATH_ROOT to "old".

Please note that Roaming paths are not supported on Windows Phone 8.0, due to
limitations in the OS itself. Attempts to use this will fail.
(Windows Phone 8.1 does not have this limitation, however.)


3. It makes SDL_GetPrefPath(), when on Windows Phone 8.0, and when
SDL_HINT_WINRT_PREF_PATH_ROOT is set to "roaming", return NULL, rather than
silently defaulting to a Local path (then switching to a Roaming path if and
when the user upgraded to Windows Phone 8.1).
aschiffler@6717
     1
/*
aschiffler@6717
     2
  Simple DirectMedia Layer
slouken@8149
     3
  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
aschiffler@6717
     4
aschiffler@6717
     5
  This software is provided 'as-is', without any express or implied
aschiffler@6717
     6
  warranty.  In no event will the authors be held liable for any damages
aschiffler@6717
     7
  arising from the use of this software.
aschiffler@6717
     8
aschiffler@6717
     9
  Permission is granted to anyone to use this software for any purpose,
aschiffler@6717
    10
  including commercial applications, and to alter it and redistribute it
aschiffler@6717
    11
  freely, subject to the following restrictions:
aschiffler@6717
    12
aschiffler@6717
    13
  1. The origin of this software must not be misrepresented; you must not
aschiffler@6717
    14
     claim that you wrote the original software. If you use this software
aschiffler@6717
    15
     in a product, an acknowledgment in the product documentation would be
aschiffler@6717
    16
     appreciated but is not required.
aschiffler@6717
    17
  2. Altered source versions must be plainly marked as such, and must not be
aschiffler@6717
    18
     misrepresented as being the original software.
aschiffler@6717
    19
  3. This notice may not be removed or altered from any source distribution.
aschiffler@6717
    20
*/
aschiffler@6717
    21
aschiffler@6717
    22
/**
aschiffler@6717
    23
 *  \file SDL_test_log.h
slouken@7191
    24
 *
aschiffler@6717
    25
 *  Include file for SDL test framework.
aschiffler@6717
    26
 *
aschiffler@6717
    27
 *  This code is a part of the SDL2_test library, not the main SDL library.
aschiffler@6717
    28
 */
aschiffler@6717
    29
slouken@7191
    30
/*
aschiffler@6717
    31
 *
aschiffler@6717
    32
 *  Wrapper to log in the TEST category
aschiffler@6717
    33
 *
aschiffler@6717
    34
 */
aschiffler@6717
    35
aschiffler@6717
    36
#ifndef _SDL_test_log_h
aschiffler@6717
    37
#define _SDL_test_log_h
aschiffler@6717
    38
aschiffler@6717
    39
#include "begin_code.h"
aschiffler@6717
    40
/* Set up for C function definitions, even when using C++ */
aschiffler@6717
    41
#ifdef __cplusplus
aschiffler@6717
    42
extern "C" {
aschiffler@6717
    43
#endif
aschiffler@6717
    44
aschiffler@6717
    45
/**
aschiffler@6717
    46
 * \brief Prints given message with a timestamp in the TEST category and INFO priority.
aschiffler@6717
    47
 *
aschiffler@6717
    48
 * \param fmt Message to be logged
aschiffler@6717
    49
 */
slouken@8820
    50
void SDLTest_Log(SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(1);
aschiffler@6717
    51
aschiffler@6717
    52
/**
aschiffler@6717
    53
 * \brief Prints given message with a timestamp in the TEST category and the ERROR priority.
aschiffler@6717
    54
 *
aschiffler@6717
    55
 * \param fmt Message to be logged
aschiffler@6717
    56
 */
slouken@8820
    57
void SDLTest_LogError(SDL_PRINTF_FORMAT_STRING const char *fmt, ...) SDL_PRINTF_VARARG_FUNC(1);
aschiffler@6717
    58
aschiffler@6717
    59
/* Ends C function definitions when using C++ */
aschiffler@6717
    60
#ifdef __cplusplus
aschiffler@6717
    61
}
aschiffler@6717
    62
#endif
aschiffler@6717
    63
#include "close_code.h"
aschiffler@6717
    64
aschiffler@6717
    65
#endif /* _SDL_test_log_h */
aschiffler@6717
    66
aschiffler@6717
    67
/* vi: set ts=4 sw=4 expandtab: */