/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#include "../../core/windows/SDL_windows.h"
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#include "../SDL_syslocale.h"
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typedef BOOL (WINAPI *pfnGetUserPreferredUILanguages)(DWORD,PULONG,/*PZZWSTR*/WCHAR*,PULONG);
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#ifndef MUI_LANGUAGE_NAME
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#define MUI_LANGUAGE_NAME 0x8
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#endif
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static pfnGetUserPreferredUILanguages pGetUserPreferredUILanguages = NULL;
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static HMODULE kernel32 = 0;
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/* this is the fallback for WinXP...one language, not a list. */
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static void
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SDL_SYS_GetPreferredLocales_winxp(char *buf, size_t buflen)
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{
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char lang[16];
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char country[16];
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const int langrc = GetLocaleInfoA(LOCALE_USER_DEFAULT,
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LOCALE_SISO639LANGNAME,
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lang, sizeof (lang));
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const int ctryrc = GetLocaleInfoA(LOCALE_USER_DEFAULT,
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LOCALE_SISO3166CTRYNAME,
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country, sizeof (country));
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/* Win95 systems will fail, because they don't have LOCALE_SISO*NAME ... */
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if (langrc == 0) {
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SDL_SetError("Couldn't obtain language info");
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} else {
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SDL_snprintf(buf, buflen, "%s%s%s", lang, ctryrc ? "_" : "", ctryrc ? country : "");
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}
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}
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/* this works on Windows Vista and later. */
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static void
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SDL_SYS_GetPreferredLocales_vista(char *buf, size_t buflen)
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{
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ULONG numlangs = 0;
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WCHAR *wbuf = NULL;
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ULONG wbuflen = 0;
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SDL_bool isstack;
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SDL_assert(pGetUserPreferredUILanguages != NULL);
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pGetUserPreferredUILanguages(MUI_LANGUAGE_NAME, &numlangs, NULL, &wbuflen);
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wbuf = SDL_small_alloc(WCHAR, wbuflen, &isstack);
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if (!wbuf) {
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SDL_OutOfMemory();
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return;
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}
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if (!pGetUserPreferredUILanguages(MUI_LANGUAGE_NAME, &numlangs, wbuf, &wbuflen)) {
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SDL_SYS_GetPreferredLocales_winxp(buf, buflen); /* oh well, try the fallback. */
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} else {
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const ULONG endidx = (ULONG) SDL_min(buflen, wbuflen - 1);
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ULONG str_start = 0;
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ULONG i;
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for (i = 0; i < endidx; i++) {
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const char ch = (char) wbuf[i]; /* these should all be low-ASCII, safe to cast */
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if (ch == '\0') {
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buf[i] = ','; /* change null separators to commas */
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str_start = i;
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} else if (ch == '-') {
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buf[i] = '_'; /* change '-' to '_' */
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} else {
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buf[i] = ch; /* copy through as-is. */
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}
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}
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buf[str_start] = '\0'; /* terminate string, chop off final ',' */
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}
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SDL_small_free(wbuf, isstack);
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}
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void
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SDL_SYS_GetPreferredLocales(char *buf, size_t buflen)
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{
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if (!kernel32) {
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kernel32 = LoadLibraryW(L"kernel32.dll");
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if (kernel32) {
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pGetUserPreferredUILanguages = (pfnGetUserPreferredUILanguages) GetProcAddress(kernel32, "GetUserPreferredUILanguages");
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}
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}
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if (pGetUserPreferredUILanguages == NULL) {
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SDL_SYS_GetPreferredLocales_winxp(buf, buflen); /* this is always available */
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} else {
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SDL_SYS_GetPreferredLocales_vista(buf, buflen); /* available on Vista and later. */
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}
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}
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/* vi: set ts=4 sw=4 expandtab: */
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