59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
#ifndef TWN_UTIL_C_H
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#define TWN_UTIL_C_H
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#include "twn_types.h"
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#include <SDL2/SDL.h>
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#include <stdbool.h>
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#include <math.h>
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#define MAX SDL_max
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#define MIN SDL_min
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void cry_impl(const char *file, const int line, const char *title, const char *text);
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#define CRY(title, text) cry_impl(__FILE__, __LINE__, title, text)
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#define CRY_SDL(title) cry_impl(__FILE__, __LINE__, title, SDL_GetError())
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#define CRY_PHYSFS(title) \
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cry_impl(__FILE__, __LINE__, title, PHYSFS_getErrorByCode(PHYSFS_getLastErrorCode()))
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/* for when there's absolutely no way to continue */
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_Noreturn void die_abruptly(void);
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/* note: you must free the returned string */
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char *expand_asterisk(const char *mask, const char *to);
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void profile_start(char profile[const static 1]);
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void profile_end(char profile[const static 1]);
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void profile_list_stats(void);
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/* http://www.azillionmonkeys.com/qed/sqroot.html */
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static inline float fast_sqrt(float x)
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{
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union {
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float f;
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uint32_t u;
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} pun = {.f = x};
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pun.u += 127 << 23;
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pun.u >>= 1;
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return pun.f;
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}
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static inline Vec2 fast_cossine(float a) {
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const float s = sinf(a);
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return (Vec2){
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.x = fast_sqrt(1.0f - s * s) * (a >= (float)M_PI_2 && a < (float)(M_PI + M_PI_2) ? -1 : 1),
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.y = s
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};
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}
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static inline bool is_power_of_two(int x)
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{
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return (x != 0) && ((x & (x - 1)) == 0);
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}
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#endif
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