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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 luadebug, ruki
* @file case.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "case"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#if defined(TB_CONFIG_OS_LINUX) || defined(TB_CONFIG_OS_BSD) || defined(TB_CONFIG_OS_SOLARIS)
# include <locale.h>
# include <wctype.h>
#endif
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
/* Unicode case conversion using wide characters
* Returns tb_true on success, tb_false on failure
*/
static tb_bool_t xm_string_case_unicode(lua_State* lua, tb_char_t const* str, tb_size_t size, tb_bool_t lower) {
tb_bool_t ok = tb_false;
tb_size_t wn = size + 1;
tb_wchar_t* wb = tb_nalloc_type(wn, tb_wchar_t);
if (!wb) {
return tb_false;
}
// Convert input UTF-8 to Wide Char
wn = tb_mbstowcs(wb, str, wn);
if (wn == (tb_size_t)-1) {
tb_free(wb);
return tb_false;
}
// Perform Case Conversion
#if defined(TB_CONFIG_OS_LINUX) || defined(TB_CONFIG_OS_BSD) || defined(TB_CONFIG_OS_SOLARIS)
locale_t loc = newlocale(LC_ALL_MASK, "C.UTF-8", (locale_t)0);
if (!loc) loc = newlocale(LC_ALL_MASK, "en_US.UTF-8", (locale_t)0);
if (!loc) loc = newlocale(LC_ALL_MASK, "C.utf8", (locale_t)0);
if (!loc) loc = newlocale(LC_ALL_MASK, "en_US.utf8", (locale_t)0);
if (loc) {
locale_t old = uselocale(loc);
tb_wchar_t* p = wb;
while (*p) {
*p = lower ? towlower(*p) : towupper(*p);
p++;
}
uselocale(old);
freelocale(loc);
} else {
if (lower) tb_wcslwr(wb);
else tb_wcsupr(wb);
}
#else
if (lower) tb_wcslwr(wb);
else tb_wcsupr(wb);
#endif
// Convert Wide Char back to UTF-8
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 != (tb_size_t)-1) {
lua_pushlstring(lua, ub, n);
ok = tb_true;
}
tb_free(ub);
}
tb_free(wb);
return ok;
}
/* //////////////////////////////////////////////////////////////////////////////////////
* 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;
}
// allocate buffer for optimistic ascii conversion
tb_char_t* buf = (tb_char_t*)tb_malloc_bytes(size);
if (!buf) return 0;
tb_size_t i;
for (i = 0; i < size; i++) {
// Stop at first non-ascii char
if ((tb_byte_t)str[i] >= 0x80) break;
// convert ascii
tb_byte_t c = (tb_byte_t)str[i];
if (lower) {
buf[i] = (tb_char_t)tb_tolower(c);
} else {
buf[i] = (tb_char_t)tb_toupper(c);
}
}
// all ascii?
if (i == size) {
lua_pushlstring(lua, buf, size);
tb_free(buf);
return 1;
}
// push the converted ascii prefix
if (i > 0) {
lua_pushlstring(lua, buf, i);
}
tb_free(buf);
// convert the remaining unicode suffix
if (xm_string_case_unicode(lua, str + i, size - i, lower)) {
// concat prefix and suffix: prefix (if any) + suffix
if (i > 0) {
lua_concat(lua, 2);
}
return 1;
}
// failed? return original string
if (i > 0) {
lua_pop(lua, 1);
}
lua_pushlstring(lua, str, size);
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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