Xonotic QuakeC
The free, fast arena FPS with crisp movement and a wide array of weapons
p99.qh
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1/* This may look like nonsense, but it really is -*- mode: C -*- */
2/* */
3/* Except for parts copied from previous work and as explicitly stated below, */
4/* the authors and copyright holders for this work are as follows: */
5/* (C) copyright 2010-2013 Jens Gustedt, INRIA, France */
6/* (C) copyright 2013 Pierre-Nicolas Clauss */
7/* (C) copyright 2012 William Morris */
8/* */
9/* This file is free software; it is part of the P99 project. */
10/* You can redistribute it and/or modify it under the terms of the QPL as */
11/* given in the file LICENSE. It is distributed without any warranty; */
12/* without even the implied warranty of merchantability or fitness for a */
13/* particular purpose. */
14/* */
15#pragma once
16
17#define P99_MAX_NUMBER 16
18#define P00_ARG( \
19 _01, _02, _03, _04, _05, _06, _07, _08, \
20 _09, _10, _11, _12, _13, _14, _15, _16, \
21 _00, ...) _00
22#define P00_NARG(...) P00_ARG(__VA_ARGS__, \
23 16, 15, 14, 13, 12, 11, 10, 9, \
24 8, 7, 6, 5, 4, 3, 2, 1, \
25 0, )
26#define P99_HAS_COMMA(...) P00_ARG(__VA_ARGS__, \
27 1, 1, 1, 1, 1, 1, 1, 1, \
28 1, 1, 1, 1, 1, 1, 1, 0, \
29 0)
30
31#define P99_IF_EMPTY(...) P99_IF_EQ(1, P99_IS_EMPTY(__VA_ARGS__))
32 // P99_HAS_COMMA(__VA_ARGS__), : test if there is just one argument, that might be empty
33 // P99_HAS_COMMA(P00_IS__EQ__ __VA_ARGS__), : test if P99_IS__EQ__ together with the argument adds a comma
34 // P99_HAS_COMMA(__VA_ARGS__ (/*empty*/)), : test if the argument together with a parenthesis adds a comma
35 // P99_HAS_COMMA(P00_IS__EQ__ __VA_ARGS__ (/*empty*/)) : test if placing it between P99_IS__EQ__ and the parenthesis adds a comma
36 #define P99_IS_EMPTY(...) \
37 P00_ISEMPTY( \
38 P99_HAS_COMMA(__VA_ARGS__), \
39 P99_HAS_COMMA(P00_IS__EQ__ __VA_ARGS__), \
40 P99_HAS_COMMA(__VA_ARGS__ (/*empty*/)), \
41 P99_HAS_COMMA(P00_IS__EQ__ __VA_ARGS__ (/*empty*/)) \
42 )
43 #define P00_IS__EQ__(...) ,
44 #define P00_ISEMPTY(_1, _2, _3, _4) P99_HAS_COMMA(P99_PASTE5(P00_IS_EMPTY_CASE_, _1, _2, _3, _4))
45 #define P00_IS_EMPTY_CASE_0000 P00_IS_EMPTY_CASE_0000
46 #define P00_IS_EMPTY_CASE_0001 ,
47 #define P00_IS_EMPTY_CASE_0010 P00_IS_EMPTY_CASE_0010
48 #define P00_IS_EMPTY_CASE_0011 P00_IS_EMPTY_CASE_0011
49 #define P00_IS_EMPTY_CASE_0100 P00_IS_EMPTY_CASE_0100
50 #define P00_IS_EMPTY_CASE_0101 P00_IS_EMPTY_CASE_0101
51 #define P00_IS_EMPTY_CASE_0110 P00_IS_EMPTY_CASE_0110
52 #define P00_IS_EMPTY_CASE_0111 P00_IS_EMPTY_CASE_0111
53 #define P00_IS_EMPTY_CASE_1000 P00_IS_EMPTY_CASE_1000
54 #define P00_IS_EMPTY_CASE_1001 P00_IS_EMPTY_CASE_1001
55 #define P00_IS_EMPTY_CASE_1010 P00_IS_EMPTY_CASE_1010
56 #define P00_IS_EMPTY_CASE_1011 P00_IS_EMPTY_CASE_1011
57 #define P00_IS_EMPTY_CASE_1100 P00_IS_EMPTY_CASE_1100
58 #define P00_IS_EMPTY_CASE_1101 P00_IS_EMPTY_CASE_1101
59 #define P00_IS_EMPTY_CASE_1110 P00_IS_EMPTY_CASE_1110
60 #define P00_IS_EMPTY_CASE_1111 P00_IS_EMPTY_CASE_1111
61
62
63#define P00_IF_CLAUSE(EXP) P00__IF_CLAUSE(EXP, P00_CLAUSE1, P00_CLAUSE2, ~)
64 #define P00__IF_CLAUSE(A, B, C, ...) C
65 #define P00_CLAUSE1(...) __VA_ARGS__ P00_IGNORE
66 #define P00_IGNORE(...)
67 #define P00_CLAUSE2(...) P00_IDENT
68 #define P00_IDENT(...) __VA_ARGS__
69
70
71#define P99_IF_EQ(A, B) P00_IF_CLAUSE(P99_PASTE4(P00_IS_, A, _EQ_, B)())
72 #define P00_IS_0_EQ_0(...) ,
73 #define P00_IS_1_EQ_1(...) ,
74
75
76#define P99_CAT2(_1, _2) _1 ## _2
77#define P99_PASTE2(_1, _2) \
78 P99_CAT2(_1, _2)
79#define P99_PASTE3(_1, _2, _3) \
80 P99_PASTE2(P99_PASTE2(_1, _2), _3)
81#define P99_PASTE4(_1, _2, _3, _4) \
82 P99_PASTE2(P99_PASTE3(_1, _2, _3), _4)
83#define P99_PASTE5(_1, _2, _3, _4, _5) \
84 P99_PASTE2(P99_PASTE4(_1, _2, _3, _4), _5)