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/*!A cross-platform build utility based on Lua
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright (C) 2015-present, Xmake Open Source Community.
*
* @author ruki
* @file case.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "case"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#include <wctype.h>
#include "tbox/libc/stdlib/setlocale.h"
/* Include Tbox platform header for spinlocks if not already in prefix.h */
#include "tbox/platform/spinlock.h"
#ifdef TB_CONFIG_OS_WINDOWS
# include <windows.h>
#endif
/* //////////////////////////////////////////////////////////////////////////////////////
* globals
*/
/*
* Define a static Tbox spinlock to protect the non-thread-safe setlocale calls.
* This ensures that on non-Windows platforms, only one thread modifies the
* global locale at a time.
*/
static tb_spinlock_t g_locale_lock = TB_SPINLOCK_INIT;
/* //////////////////////////////////////////////////////////////////////////////////////
* helper
*/
static tb_int_t xm_string_case(lua_State* lua, tb_bool_t lower) {
// check
tb_assert_and_check_return_val(lua, 0);
// get the string
size_t size = 0;
tb_char_t const* str = luaL_checklstring(lua, 1, &size);
tb_check_return_val(str, 0);
// empty?
if (!size) {
lua_pushstring(lua, "");
return 1;
}
// convert to wchar
tb_size_t wn = size + 1;
tb_wchar_t* wb = tb_nalloc_type(wn, tb_wchar_t);
if (wb) {
wn = tb_mbstowcs(wb, str, wn);
if (wn != -1) {
// to case
#ifdef TB_CONFIG_OS_WINDOWS
if (lower) CharLowerBuffW((LPWSTR)wb, (DWORD)wn);
else CharUpperBuffW((LPWSTR)wb, (DWORD)wn);
#else
tb_spinlock_enter(&g_locale_lock);
// attempt to set utf-8 locale for towlower/towupper
// we need this on some platforms like DragonFly BSD, because towlower/towupper depends on the current locale
#ifdef TB_CONFIG_LIBC_HAVE_SETLOCALE
tb_char_t const* old_locale_str = setlocale(LC_ALL, tb_null);
tb_char_t* old_locale = old_locale_str? tb_strdup(old_locale_str) : tb_null;
tb_setlocale();
#endif
tb_size_t i = 0;
for (i = 0; i < wn; i++) {
wb[i] = lower? towlower(wb[i]) : towupper(wb[i]);
}
#ifdef TB_CONFIG_LIBC_HAVE_SETLOCALE
if (old_locale) {
setlocale(LC_ALL, old_locale);
tb_free(old_locale);
}
#endif
/* Unlock after locale is restored */
tb_spinlock_leave(&g_locale_lock);
#endif
// convert to utf8
tb_size_t un = (wn + 1) * 4;
tb_char_t* ub = (tb_char_t*)tb_malloc_bytes(un);
if (ub) {
tb_size_t n = tb_wcstombs(ub, wb, un);
if (n != -1) {
lua_pushlstring(lua, ub, n);
} else {
lua_pushlstring(lua, str, size);
}
tb_free(ub);
} else {
lua_pushlstring(lua, str, size);
}
} else {
lua_pushlstring(lua, str, size);
}
tb_free(wb);
} else {
lua_pushlstring(lua, str, size);
}
// ok
return 1;
}
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_int_t xm_string_lower(lua_State* lua) {
return xm_string_case(lua, tb_true);
}
tb_int_t xm_string_upper(lua_State* lua) {
return xm_string_case(lua, tb_false);
}
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