1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
/*!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 reverse.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "utf8.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* utf8.reverse(s)
*/
tb_int_t xm_utf8_reverse(lua_State *lua) {
size_t len;
tb_char_t const* s = luaL_checklstring(lua, 1, &len);
if (len == 0) {
lua_pushliteral(lua, "");
return 1;
}
// do reverse
if (len < 1024) {
tb_char_t buf[1024 + 1];
xm_utf8_reverse_impl(s, len, buf);
lua_pushlstring(lua, buf, len);
} else {
tb_char_t* buf = (tb_char_t*)tb_malloc_bytes(len + 1);
if (buf) {
xm_utf8_reverse_impl(s, len, buf);
lua_pushlstring(lua, buf, len);
tb_free(buf);
} else {
lua_pushnil(lua);
}
}
return 1;
}
|
