source: abuse/trunk/src/common.h @ 661

Last change on this file since 661 was 661, checked in by Sam Hocevar, 8 years ago

imlib: refactor image::PutPart? and image::PutPartMasked?, get rid of
unused methods image::PutPartXrev? and image::fill_image.

  • Property svn:keywords set to Id
File size: 2.3 KB
Line 
1/*
2 *  Abuse - dark 2D side-scrolling platform game
3 *  Copyright (c) 1995 Crack dot Com
4 *  Copyright (c) 2005-2011 Sam Hocevar <sam@hocevar.net>
5 *
6 *  This software was released into the Public Domain. As with most public
7 *  domain software, no warranty is made or implied by Crack dot Com, by
8 *  Jonathan Clark, or by Sam Hocevar.
9 */
10
11#ifndef __COMMON_H__
12#define __COMMON_H__
13
14//
15// Globally required headers
16//
17#include <stdint.h>
18#include <stdio.h>
19
20//
21// Lol Engine
22//
23#include "lol/matrix.h"
24#include "lol/timer.h"
25using namespace lol;
26
27//
28// Custom utility functions
29//
30static inline int Min(int a, int b) { return a < b ? a : b; }
31static inline int Max(int a, int b) { return a > b ? a : b; }
32static inline unsigned int Min(unsigned int a, unsigned int b) { return a < b ? a : b; }
33static inline unsigned int Max(unsigned int a, unsigned int b) { return a > b ? a : b; }
34static inline long Min(long a, long b) { return a < b ? a : b; }
35static inline long Max(long a, long b) { return a > b ? a : b; }
36static inline unsigned long Min(unsigned long a, unsigned long b) { return a < b ? a : b; }
37static inline unsigned long Max(unsigned long a, unsigned long b) { return a > b ? a : b; }
38static inline float Min(float a, float b) { return a < b ? a : b; }
39static inline float Max(float a, float b) { return a > b ? a : b; }
40
41static inline vec2i Min(vec2i a, vec2i b) { return vec2i(Min(a.x, b.x), Min(a.y, b.y)); }
42static inline vec2i Max(vec2i a, vec2i b) { return vec2i(Max(a.x, b.x), Max(a.y, b.y)); }
43
44//
45// Byte swapping
46//
47static inline int BigEndian()
48{
49    union { uint32_t const x; uint8_t t[4]; } const u = { 0x01ffff00 };
50    return u.t[0];
51}
52
53static inline uint16_t lstl(uint16_t x)
54{
55    if (BigEndian())
56        return ((uint16_t)x << 8 ) | ((uint16_t)x >> 8);
57    return x;
58}
59
60static inline uint32_t lltl(uint32_t x)
61{
62    if (BigEndian())
63        return ((uint32_t)x >> 24) | (((uint32_t)x & 0x00ff0000) >> 8)
64             | (((uint32_t)x & 0x0000ff00) << 8) | ((uint32_t)x << 24);
65    return x;
66}
67
68#define ERROR(x,st) { if (!(x)) \
69   { printf("Error on line %d of %s : %s\n", \
70     __LINE__,__FILE__,st); exit(1); } }
71
72// These macros should be removed for the non-debugging version
73#ifdef NO_CHECK
74#   define CONDITION(x,st)
75#   define CHECK(x)
76#else
77#   define CONDITION(x,st) ERROR(x,st)
78#   define CHECK(x) CONDITION(x,"Check stop");
79#endif
80
81#endif // __COMMON_H__
82
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