#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <math.h>

#ifndef UTIL_H
#define UTIL_H

#define SET_BIT(b, n) (b | (0x1 << n))
#define CLEAR_BIT(b, n) (b & ~(0x1 << n))
#define IS_BIT_SET(b, n) ((b >> n) & 0x1)
#define TOGGLE_BIT(b, n) (b ^ (0x1 << n))
#define HAS_FLAG(v, f) ((v & f) == f)

// Fast math macros.
#define SLDJ_SQRT(number) sldjSqrtTable[(uint16_t)(number)]

#define SLDJ_SIN(number) sldjSinTable[(uint16_t)(number)]
#define SLDJ_COS(number) sldjCosTable[(uint16_t)(number)]
#define SLDJ_TAN(number) sldjTanTable[(uint16_t)(number)]

#define SLDJ_HYPOT2(x, y) (SLDJ_SQRT(x * x + y * y))
#define SLDJ_HYPOT3(x, y, z) (SLDJ_SQRT(x * x + y * y + z * z))

#define SLDJ_RANDOM16(seed) (seed = (75 * seed + 74) % 65537)
#define SLDJ_RANDOM32(seed) (seed = (1664525 * seed + 1013904223) % 4294967296)

// Stuff stolen from raylib/raymath
#ifndef RL_COLOR_TYPE
#define RL_COLOR_TYPE
typedef struct Color {
    unsigned char r;
    unsigned char g;
    unsigned char b;
    unsigned char a;
} Color;
#endif

#ifndef PI
    #define PI 3.14159265358979323846f
#endif

#ifndef DEG2RAD
    #define DEG2RAD (PI/180.0f)
#endif

#ifndef RAD2DEG
    #define RAD2DEG (180.0f/PI)
#endif

// Used for sending information to a scanner.
typedef struct SldjContext {
    uint16_t viewportWidth;
    uint16_t viewportHeight;
    uint8_t targetFps;
    uint16_t xCount;
    uint16_t yCount;
} SldjContext;

// Tables.
extern float sldjSqrtTable[65536];

extern float sldjSinTable[361];
extern float sldjCosTable[361];
extern float sldjTanTable[361];

#endif