Vita: add SDL_GetPreferredLocales support

CMakeLists.txt

@@ -2279,6 +2279,11 @@ elseif(VITA)
       ${SDL2_SOURCE_DIR}/src/thread/generic/SDL_systls.c)
     set(HAVE_SDL_THREADS TRUE)
   endif()
+  if(SDL_LOCALE)
+    file(GLOB LOCALE_SOURCES ${SDL2_SOURCE_DIR}/src/locale/vita/*.c)
+    set(SOURCE_FILES ${SOURCE_FILES} ${LOCALE_SOURCES})
+    set(HAVE_SDL_LOCALE TRUE)
+  endif()
   if(SDL_TIMERS)
     set(SDL_TIMER_VITA 1)
     file(GLOB TIMER_SOURCES ${SDL2_SOURCE_DIR}/src/timer/vita/*.c)

src/locale/vita/SDL_syslocale.c

@@ -0,0 +1,71 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+#include "../SDL_syslocale.h"
+
+#include <psp2/apputil.h>
+#include <psp2/system_param.h>
+
+void
+SDL_SYS_GetPreferredLocales(char *buf, size_t buflen)
+{
+    const char *vita_locales[] = {
+        "ja_JP",
+        "en_US",
+        "fr_FR",
+        "es_ES",
+        "de_DE",
+        "it_IT",
+        "nl_NL",
+        "pt_PT",
+        "ru_RU",
+        "ko_KR",
+        "zh_TW",
+        "zh_CN",
+        "fi_FI",
+        "sv_SE",
+        "da_DK",
+        "no_NO",
+        "pl_PL",
+        "pt_BR",
+        "en_GB",
+        "tr_TR",
+    };
+
+    Sint32 language = SCE_SYSTEM_PARAM_LANG_ENGLISH_US;
+    SceAppUtilInitParam initParam;
+    SceAppUtilBootParam bootParam;
+    SDL_zero(initParam);
+    SDL_zero(bootParam);
+    sceAppUtilInit(&initParam, &bootParam);
+    sceAppUtilSystemParamGetInt(SCE_SYSTEM_PARAM_ID_LANG, &language);
+
+    if (language < 0 || language > SCE_SYSTEM_PARAM_LANG_TURKISH)
+        language = SCE_SYSTEM_PARAM_LANG_ENGLISH_US; // default to english
+
+    SDL_strlcpy(buf, vita_locales[language], buflen);
+
+    sceAppUtilShutdown();
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
+