515 lines
13 KiB
C
515 lines
13 KiB
C
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#ifndef DQNT_H
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#define DQNT_H
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/*
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#define DQNT_IMPLEMENTATION // Enable the implementation
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#define DQNT_MAKE_STATIC // Make all functions be static
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#include "dqnt.h"
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*/
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#ifdef DQNT_MAKE_STATIC
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#define DQNT_FILE_SCOPE static
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#else
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#define DQNT_FILE_SCOPE
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#endif
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////////////////////////////////////////////////////////////////////////////////
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//
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// HEADER
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//
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////////////////////////////////////////////////////////////////////////////////
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#include "stdint.h"
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#define LOCAL_PERSIST static
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#define FILE_SCOPE static
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typedef uint64_t u64;
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typedef uint32_t u32;
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typedef uint16_t u16;
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typedef uint8_t u8;
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typedef int32_t i64;
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typedef int32_t i32;
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typedef int64_t i16;
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typedef double f64;
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typedef float f32;
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#define DQNT_INVALID_CODE_PATH 0
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#define DQNT_ARRAY_COUNT(array) (sizeof(array) / sizeof(array[0]))
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#define DQNT_ASSERT(expr) if (!(expr)) { (*((i32 *)0)) = 0; }
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#define DQNT_MATH_PI 3.14159265359f
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#define DQNT_MATH_ABS(x) (((x) < 0) ? (-(x)) : (x))
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#define DQNT_MATH_DEGREES_TO_RADIANS(x) ((x * (MATH_PI / 180.0f)))
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#define DQNT_MATH_RADIANS_TO_DEGREES(x) ((x * (180.0f / MATH_PI)))
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#define DQNT_MATH_MAX(a, b) ((a) < (b) ? (b) : (a))
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#define DQNT_MATH_MIN(a, b) ((a) < (b) ? (a) : (b))
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#define DQNT_MATH_SQUARED(x) ((x) * (x))
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#define DQNT_MATH_SQRT(x) (sqrtf(x))
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////////////////////////////////////////////////////////////////////////////////
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// Vec2
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////////////////////////////////////////////////////////////////////////////////
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typedef union dqnt_v2 {
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struct { f32 x, y; };
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struct { f32 w, h; };
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struct { f32 min, max; };
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f32 e[2];
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} dqnt_v2;
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DQNT_FILE_SCOPE dqnt_v2 V2(f32 x, f32 y);
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// Create a 2d-vector using ints and typecast to floats
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DQNT_FILE_SCOPE dqnt_v2 V2i(i32 x, i32 y);
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////////////////////////////////////////////////////////////////////////////////
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// Vec3
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////////////////////////////////////////////////////////////////////////////////
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typedef union dqnt_v3
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{
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struct { f32 x, y, z; };
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struct { f32 r, g, b; };
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f32 e[3];
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} dqnt_v3;
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DQNT_FILE_SCOPE dqnt_v3 V3i(i32 x, i32 y, i32 z);
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DQNT_FILE_SCOPE dqnt_v3 V3(f32 x, f32 y, f32 z);
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////////////////////////////////////////////////////////////////////////////////
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// Vec3
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////////////////////////////////////////////////////////////////////////////////
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typedef union dqnt_v4
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{
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struct { f32 x, y, z, w; };
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struct { f32 r, g, b, a; };
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f32 e[4];
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dqnt_v2 vec2[2];
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} dqnt_v4;
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DQNT_FILE_SCOPE dqnt_v3 V3i(i32 x, i32 y, i32 z);
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DQNT_FILE_SCOPE dqnt_v4 V4(f32 x, f32 y, f32 z, f32 w);
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////////////////////////////////////////////////////////////////////////////////
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// Other Math
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////////////////////////////////////////////////////////////////////////////////
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typedef struct Rect
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{
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dqnt_v2 min;
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dqnt_v2 max;
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} dqnt_rect;
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////////////////////////////////////////////////////////////////////////////////
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// String Ops
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////////////////////////////////////////////////////////////////////////////////
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DQNT_FILE_SCOPE bool dqnt_char_is_digit (char c);
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DQNT_FILE_SCOPE bool dqnt_char_is_alpha (char c);
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DQNT_FILE_SCOPE bool dqnt_char_is_alphanum(char c);
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DQNT_FILE_SCOPE i32 dqnt_strcmp (const char *a, const char *b);
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// Returns the length without the null terminator
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DQNT_FILE_SCOPE i32 dqnt_strlen (const char *a);
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DQNT_FILE_SCOPE char *dqnt_strncpy(char *dest, const char *src, i32 numChars);
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#define DQNT_I32_TO_STR_MAX_BUF_SIZE 11
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DQNT_FILE_SCOPE bool dqnt_str_reverse(char *buf, const i32 bufSize);
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DQNT_FILE_SCOPE i32 dqnt_str_to_i32 (char *const buf, const i32 bufSize);
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DQNT_FILE_SCOPE void dqnt_i32_to_str (i32 value, char *buf, i32 bufSize);
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DQNT_FILE_SCOPE i32 dqnt_wstrcmp(const wchar_t *a, const wchar_t *b);
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DQNT_FILE_SCOPE void dqnt_wstrcat(const wchar_t *a, i32 lenA, const wchar_t *b, i32 lenB, wchar_t *out, i32 outLen);
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DQNT_FILE_SCOPE i32 dqnt_wstrlen(const wchar_t *a);
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////////////////////////////////////////////////////////////////////////////////
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// Timer
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////////////////////////////////////////////////////////////////////////////////
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DQNT_FILE_SCOPE f64 dqnt_time_now_in_s();
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DQNT_FILE_SCOPE f64 dqnt_time_now_in_ms();
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////////////////////////////////////////////////////////////////////////////////
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// PCG (Permuted Congruential Generator) Random Number Generator
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////////////////////////////////////////////////////////////////////////////////
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typedef struct DqntRandPCGState
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{
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u64 state[2];
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} DqntRandPCGState;
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// You can manually specify a seed by calling init_with_seed, otherwise it
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// automatically creates a seed using rdtsc. The generator is not valid until
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// it's been seeded.
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DQNT_FILE_SCOPE void dqnt_rnd_pcg_init_with_seed(DqntRandPCGState *pcg, u32 seed);
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DQNT_FILE_SCOPE void dqnt_rnd_pcg_init(DqntRandPCGState *pcg);
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// Returns a random number N between [0, 0xFFFFFFFF]
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DQNT_FILE_SCOPE u32 dqnt_rnd_pcg_next (DqntRandPCGState *pcg);
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// Returns a random float N between [0.0, 1.0f]
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DQNT_FILE_SCOPE f32 dqnt_rnd_pcg_nextf(DqntRandPCGState *pcg);
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// Returns a random integer N between [min, max]
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DQNT_FILE_SCOPE i32 dqnt_rnd_pcg_range(DqntRandPCGState *pcg, i32 min, i32 max);
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#endif /* DQNT_H */
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////////////////////////////////////////////////////////////////////////////////
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//
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// IMPLEMENTATION
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//
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////////////////////////////////////////////////////////////////////////////////
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#ifdef DQNT_IMPLEMENTATION
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#undef DQNT_IMPLEMENTATION
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#ifdef _WIN32
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#define DQNT_WIN32
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#include "Windows.h"
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#define WIN32_LEAN_AND_MEAN
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#endif
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////////////////////////////////////////////////////////////////////////////////
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// Vec2
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////////////////////////////////////////////////////////////////////////////////
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DQNT_FILE_SCOPE inline dqnt_v2 dqnt_vec2(f32 x, f32 y)
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{
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dqnt_v2 result = {};
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result.x = x;
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result.y = y;
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return result;
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}
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DQNT_FILE_SCOPE inline dqnt_v2 dqnt_vec2i(i32 x, i32 y)
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{
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dqnt_v2 result = dqnt_vec2((f32)x, (f32)y);
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return result;
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}
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DQNT_FILE_SCOPE dqnt_v2 dqnt_vec2_constrain_to_ratio(dqnt_v2 dim,
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dqnt_v2 ratio)
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{
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dqnt_v2 result = {};
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f32 numRatioIncrementsToWidth = (f32)(dim.w / ratio.w);
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f32 numRatioIncrementsToHeight = (f32)(dim.h / ratio.h);
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f32 leastIncrementsToSide =
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DQNT_MATH_MIN(numRatioIncrementsToHeight, numRatioIncrementsToWidth);
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result.w = (f32)(ratio.w * leastIncrementsToSide);
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result.h = (f32)(ratio.h * leastIncrementsToSide);
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Vec3
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////////////////////////////////////////////////////////////////////////////////
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DQNT_FILE_SCOPE inline dqnt_v3 dqnt_vec3(f32 x, f32 y, f32 z)
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{
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dqnt_v3 result = {};
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result.x = x;
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result.y = y;
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result.z = z;
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return result;
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}
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DQNT_FILE_SCOPE inline dqnt_v3 dqnt_vec3i(i32 x, i32 y, i32 z)
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{
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dqnt_v3 result = dqnt_vec3((f32)x, (f32)y, (f32)z);
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Vec4
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////////////////////////////////////////////////////////////////////////////////
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DQNT_FILE_SCOPE inline dqnt_v4 dqnt_vec4(f32 x, f32 y, f32 z, f32 w)
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{
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dqnt_v4 result = {x, y, z, w};
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return result;
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}
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DQNT_FILE_SCOPE inline dqnt_v4 dqnt_vec4i(i32 x, i32 y, i32 z, i32 w) {
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dqnt_v4 result = dqnt_vec4((f32)x, (f32)y, (f32)z, (f32)w);
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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// String Ops
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////////////////////////////////////////////////////////////////////////////////
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DQNT_FILE_SCOPE bool dqnt_char_is_digit(char c)
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{
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if (c >= '0' && c <= '9') return true;
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return false;
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}
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DQNT_FILE_SCOPE bool dqnt_char_is_alpha(char c)
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{
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if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')) return true;
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return false;
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}
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DQNT_FILE_SCOPE bool dqnt_char_is_alphanum(char c)
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{
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if (dqnt_char_is_alpha(c) || dqnt_char_is_digit(c)) return true;
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return false;
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}
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DQNT_FILE_SCOPE i32 dqnt_strcmp(const char *a, const char *b)
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{
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if (!a && !b) return -1;
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if (!a) return -1;
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if (!b) return -1;
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while ((*a) == (*b))
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{
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if (!(*a)) return 0;
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a++;
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b++;
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}
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return (((*a) < (*b)) ? -1 : 1);
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}
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DQNT_FILE_SCOPE i32 dqnt_strlen(const char *a)
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{
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i32 result = 0;
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while (a && a[result]) result++;
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return result;
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}
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DQNT_FILE_SCOPE char *dqnt_strncpy(char *dest, const char *src, i32 numChars)
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{
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if (!dest) return NULL;
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if (!src) return dest;
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for (i32 i = 0; i < numChars; i++)
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dest[i] = src[i];
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return dest;
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}
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DQNT_FILE_SCOPE bool dqnt_str_reverse(char *buf, const i32 bufSize)
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{
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if (!buf) return false;
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i32 mid = bufSize / 2;
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for (i32 i = 0; i < mid; i++)
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{
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char tmp = buf[i];
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buf[i] = buf[(bufSize - 1) - i];
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buf[(bufSize - 1) - i] = tmp;
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}
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return true;
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}
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DQNT_FILE_SCOPE i32 dqnt_str_to_i32(char *const buf, const i32 bufSize)
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{
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if (!buf || bufSize == 0) return 0;
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i32 index = 0;
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bool isNegative = false;
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if (buf[index] == '-' || buf[index] == '+')
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{
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if (buf[index] == '-') isNegative = true;
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index++;
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}
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else if (!dqnt_char_is_digit(buf[index]))
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{
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return 0;
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}
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i32 result = 0;
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for (i32 i = index; i < bufSize; i++)
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{
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if (dqnt_char_is_digit(buf[i]))
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{
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result *= 10;
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result += (buf[i] - '0');
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}
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else
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{
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break;
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}
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}
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if (isNegative) result *= -1;
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return result;
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}
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DQNT_FILE_SCOPE void dqnt_i32_to_str(i32 value, char *buf, i32 bufSize)
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{
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if (!buf || bufSize == 0) return;
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if (value == 0)
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{
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buf[0] = '0';
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return;
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}
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// NOTE(doyle): Max 32bit integer (+-)2147483647
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i32 charIndex = 0;
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bool negative = false;
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if (value < 0) negative = true;
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if (negative) buf[charIndex++] = '-';
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i32 val = DQNT_MATH_ABS(value);
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while (val != 0 && charIndex < bufSize)
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{
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i32 rem = val % 10;
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buf[charIndex++] = (u8)rem + '0';
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val /= 10;
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}
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// NOTE(doyle): If string is negative, we only want to reverse starting
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// from the second character, so we don't put the negative sign at the end
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if (negative)
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{
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dqnt_str_reverse(buf + 1, charIndex - 1);
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}
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else
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{
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dqnt_str_reverse(buf, charIndex);
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}
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}
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DQNT_FILE_SCOPE i32 dqnt_wstrcmp(const wchar_t *a, const wchar_t *b)
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{
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if (!a && !b) return -1;
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if (!a) return -1;
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if (!b) return -1;
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while ((*a) == (*b))
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{
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if (!(*a)) return 0;
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a++;
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b++;
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}
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return (((*a) < (*b)) ? -1 : 1);
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}
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DQNT_FILE_SCOPE i32 dqnt_wstrlen(const wchar_t *a)
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{
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i32 result = 0;
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while (a && a[result]) result++;
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return result;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Timer
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////////////////////////////////////////////////////////////////////////////////
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#ifdef DQNT_WIN32
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inline FILE_SCOPE f64 dqnt_win32_query_perf_counter_time_in_s_internal()
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{
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LOCAL_PERSIST LARGE_INTEGER queryPerformanceFrequency = {};
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if (queryPerformanceFrequency.QuadPart == 0)
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{
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QueryPerformanceFrequency(&queryPerformanceFrequency);
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DQNT_ASSERT(queryPerformanceFrequency.QuadPart != 0);
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}
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LARGE_INTEGER qpcResult;
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QueryPerformanceCounter(&qpcResult);
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// Convert to seconds
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f64 timestamp =
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(f64)(qpcResult.QuadPart / queryPerformanceFrequency.QuadPart);
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return timestamp;
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}
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#endif
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f64 dqnt_time_now_in_s()
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{
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#ifdef _WIN32
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return dqnt_win32_query_perf_counter_time_in_s_internal();
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#else
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DQNT_ASSERT(DQNT_INVALID_CODE_PATH);
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return 0;
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#endif
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};
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f64 dqnt_time_now_in_ms()
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{
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return dqnt_time_now_in_s() * 1000.0f;
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}
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////////////////////////////////////////////////////////////////////////////////
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// PCG (Permuted Congruential Generator) Random Number Generator
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////////////////////////////////////////////////////////////////////////////////
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// Public Domain library with thanks to Mattias Gustavsson
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// https://github.com/mattiasgustavsson/libs/blob/master/docs/rnd.md
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||
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|
// Convert a randomized u32 value to a float value x in the range 0.0f <= x
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|
// < 1.0f. Contributed by Jonatan Hedborg
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FILE_SCOPE f32 dqnt_rnd_f32_normalized_from_u32_internal(u32 value)
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|
{
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||
|
u32 exponent = 127;
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||
|
u32 mantissa = value >> 9;
|
||
|
u32 result = (exponent << 23) | mantissa;
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|
f32 fresult = *(f32 *)(&result);
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|
return fresult - 1.0f;
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|
}
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||
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||
|
FILE_SCOPE u64 dqnt_rnd_murmur3_avalanche64_internal(u64 h)
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||
|
{
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||
|
h ^= h >> 33;
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||
|
h *= 0xff51afd7ed558ccd;
|
||
|
h ^= h >> 33;
|
||
|
h *= 0xc4ceb9fe1a85ec53;
|
||
|
h ^= h >> 33;
|
||
|
return h;
|
||
|
}
|
||
|
|
||
|
FILE_SCOPE u32 dqnt_rnd_make_seed_internal()
|
||
|
{
|
||
|
#ifdef _WIN32
|
||
|
__int64 numClockCycles = __rdtsc();
|
||
|
return (u32)numClockCycles;
|
||
|
#else
|
||
|
unsigned long long numClockCycles = rdtsc();
|
||
|
return (u32)numClockCycles;
|
||
|
#endif
|
||
|
}
|
||
|
|
||
|
DQNT_FILE_SCOPE void dqnt_rnd_pcg_init_with_seed(DqntRandPCGState *pcg, u32 seed)
|
||
|
{
|
||
|
u64 value = (((u64)seed) << 1ULL) | 1ULL;
|
||
|
value = dqnt_rnd_murmur3_avalanche64_internal(value);
|
||
|
pcg->state[0] = 0U;
|
||
|
pcg->state[1] = (value << 1ULL) | 1ULL;
|
||
|
dqnt_rnd_pcg_next(pcg);
|
||
|
pcg->state[0] += dqnt_rnd_murmur3_avalanche64_internal(value);
|
||
|
dqnt_rnd_pcg_next(pcg);
|
||
|
}
|
||
|
|
||
|
DQNT_FILE_SCOPE void dqnt_rnd_pcg_init(DqntRandPCGState *pcg)
|
||
|
{
|
||
|
u32 seed = dqnt_rnd_make_seed_internal();
|
||
|
dqnt_rnd_pcg_init_with_seed(pcg, seed);
|
||
|
}
|
||
|
|
||
|
DQNT_FILE_SCOPE u32 dqnt_rnd_pcg_next(DqntRandPCGState *pcg)
|
||
|
{
|
||
|
u64 oldstate = pcg->state[0];
|
||
|
pcg->state[0] = oldstate * 0x5851f42d4c957f2dULL + pcg->state[1];
|
||
|
u32 xorshifted = (u32)(((oldstate >> 18ULL) ^ oldstate) >> 27ULL);
|
||
|
u32 rot = (u32)(oldstate >> 59ULL);
|
||
|
return (xorshifted >> rot) | (xorshifted << ((-(i32)rot) & 31));
|
||
|
}
|
||
|
|
||
|
DQNT_FILE_SCOPE f32 dqnt_rnd_pcg_nextf(DqntRandPCGState *pcg)
|
||
|
{
|
||
|
return dqnt_rnd_f32_normalized_from_u32_internal(dqnt_rnd_pcg_next(pcg));
|
||
|
}
|
||
|
|
||
|
DQNT_FILE_SCOPE i32 dqnt_rnd_pcg_range(DqntRandPCGState *pcg, i32 min, i32 max)
|
||
|
{
|
||
|
i32 const range = (max - min) + 1;
|
||
|
if (range <= 0) return min;
|
||
|
i32 const value = (i32)(dqnt_rnd_pcg_nextf(pcg) * range);
|
||
|
return min + value;
|
||
|
}
|
||
|
|
||
|
#endif /* DQNT_IMPLEMENTATION */
|