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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
{* UltraStar Deluxe - Karaoke Game
*
* UltraStar Deluxe is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*}
unit ULuaUtils;
interface
{$IFDEF FPC}
{$MODE Delphi}
{$ENDIF}
{$I switches.inc}
uses ULua, ULuaCore;
{ converts a lua table with a structure like:
* = 1 , * = 4 , * = 5
to an integer with the value:
0b11001
does not pop anything }
function Lua_ToBinInt(L: PLua_State; idx: Integer): Integer;
{ converts an integer with the value:
0b11001
to a lua table with a structure like:
* = 1 , * = 4 , * = 5
and pushed the table onto the stack }
procedure Lua_PushBinInt(L: PLua_State; BinInt: Integer);
{ returns plugin that is the owner of the given state
may raise a lua error if the parent id is not found
in states registry, if state owner does not exists
or is not loaded. So a check for a nil value is not
necessary }
function Lua_GetOwner(L: PLua_State): TLuaPlugin;
{ this is a helper in case an evenet owner don't has no use for the results
returns number of popped elements }
function Lua_ClearStack(L: Plua_State): Integer;
implementation
{ converts a lua table with a structure like:
* = 1 , * = 4 , * = 5
to an integer with the value:
0b11001
does not pop anything }
function Lua_ToBinInt(L: PLua_State; idx: Integer): Integer;
var
I: Integer;
begin
// default: no bits set
Result := 0;
lua_checkstack(L, 2);
if (idx < 0) then
dec(idx); // we will push one value before using this
lua_PushNil(L);
while (lua_next(L, idx) <> 0) do
begin
if (lua_isNumber(L, -1)) then
begin //check if we got an integer value from 1 to 32
I := lua_toInteger(L, -1);
if (I >= 1) and (I <= 32) then
Result := Result or 1 shl (I - 1);
end;
// pop value, so key is on top
lua_pop(L, 1);
end;
end;
{ converts an integer with the value:
0b11001
to a lua table with a structure like:
* = 1 , * = 4 , * = 5
and pushed the table onto the stack }
procedure Lua_PushBinInt(L: PLua_State; BinInt: Integer);
var
I, Index: Integer;
begin
lua_newTable(L);
Index := 1; //< lua starts w/ index 1
for I := 0 to 31 do
if (BinInt and (1 shl I) <> 0) then
begin
lua_pushInteger(L, Index);
lua_pushInteger(L, I);
lua_settable(L, -3);
Inc(Index);
end;
end;
{ returns plugin that is the owner of the given state
may raise a lua error if the parent id is not found
in states registry, if state owner does not exists
or is not loaded. So a check for a nil value is not
necessary }
function Lua_GetOwner(L: PLua_State): TLuaPlugin;
begin
lua_checkstack(L, 1);
lua_getfield (L, LUA_REGISTRYINDEX, '_USDX_STATE_ID');
if (not lua_isNumber(L, -1)) then
luaL_error(L, 'unable to get _USDX_STATE_ID');
Result := LuaCore.GetPluginById(lua_toInteger(L, -1));
lua_pop(L, 1); //< remove state id from stack
if (Result = nil) then
luaL_error(L, '_USDX_STATE_ID has invalid value')
else if (Result.Status > psRunning) then
luaL_error(L, 'owning plugin is not loaded or already unloaded in Lua_GetOwner');
end;
{ this is a helper in case an evenet owner don't has no use for the results
returns number of popped elements }
function Lua_ClearStack(L: Plua_State): Integer;
begin
Result := lua_gettop(L);
lua_pop(L, Result);
end;
end.
|
