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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/*!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 decompress.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "decompress"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
tb_int_t xm_lz4_decompress(lua_State *lua) {
tb_assert_and_check_return_val(lua, 0);
// get data and size
tb_size_t size = 0;
tb_byte_t const *data = tb_null;
if (xm_lua_isinteger(lua, 1)) {
data = (tb_byte_t const *)(tb_size_t)(tb_long_t)lua_tointeger(lua, 1);
}
if (xm_lua_isinteger(lua, 2)) {
size = (tb_size_t)lua_tointeger(lua, 2);
}
if (!data || !size) {
lua_pushnil(lua);
lua_pushfstring(lua, "invalid data(%p) and size(%d)!", data, (tb_int_t)size);
return 2;
}
tb_assert_static(sizeof(lua_Integer) >= sizeof(tb_pointer_t));
// do decompress
tb_bool_t ok = tb_false;
LZ4F_errorCode_t code;
LZ4F_decompressionContext_t ctx = tb_null;
tb_buffer_t result;
do {
tb_buffer_init(&result);
code = LZ4F_createDecompressionContext(&ctx, LZ4F_VERSION);
if (LZ4F_isError(code)) {
break;
}
tb_byte_t buffer[8192];
tb_bool_t failed = tb_false;
while (1) {
size_t advance = (size_t)size;
size_t buffer_size = sizeof(buffer);
code = LZ4F_decompress(ctx, buffer, &buffer_size, data, &advance, tb_null);
if (LZ4F_isError(code)) {
failed = tb_true;
break;
}
if (buffer_size == 0) {
break;
}
data += advance;
size -= advance;
tb_buffer_memncat(&result, buffer, buffer_size);
}
tb_assert_and_check_break(!failed && tb_buffer_size(&result));
lua_pushlstring(lua, (tb_char_t const *)tb_buffer_data(&result), tb_buffer_size(&result));
ok = tb_true;
} while (0);
if (ctx) {
LZ4F_freeDecompressionContext(ctx);
ctx = tb_null;
}
tb_buffer_exit(&result);
if (!ok) {
tb_char_t const *error = LZ4F_getErrorName(code);
lua_pushnil(lua);
lua_pushstring(lua, error ? error : "unknown");
return 2;
}
return 1;
}
|
