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Do massive overhaul and simplification of DN

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doylet
2026-03-07 20:40:16 +11:00
parent ad019541a4
commit 19df3b75ce
53 changed files with 3880 additions and 5101 deletions
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Source/Extra/dn_helpers.cpp
+3 -99
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@@ -4,102 +4,6 @@
#include "dn_helpers.h"
#endif
/*
////////////////////////////////////////////////////////////////////////////////////////////////////
//
// $$\ $$\ $$$$$$$$\ $$\ $$$$$$$\ $$$$$$$$\ $$$$$$$\ $$$$$$\
// $$ | $$ |$$ _____|$$ | $$ __$$\ $$ _____|$$ __$$\ $$ __$$\
// $$ | $$ |$$ | $$ | $$ | $$ |$$ | $$ | $$ |$$ / \__|
// $$$$$$$$ |$$$$$\ $$ | $$$$$$$ |$$$$$\ $$$$$$$ |\$$$$$$\
// $$ __$$ |$$ __| $$ | $$ ____/ $$ __| $$ __$$< \____$$\
// $$ | $$ |$$ | $$ | $$ | $$ | $$ | $$ |$$\ $$ |
// $$ | $$ |$$$$$$$$\ $$$$$$$$\ $$ | $$$$$$$$\ $$ | $$ |\$$$$$$ |
// \__| \__|\________|\________|\__| \________|\__| \__| \______/
//
// dn_helpers.cpp
//
////////////////////////////////////////////////////////////////////////////////////////////////////
*/
// NOTE: DN_PCG32 //////////////////////////////////////////////////////////////////////////////////
#define DN_PCG_DEFAULT_MULTIPLIER_64 6364136223846793005ULL
#define DN_PCG_DEFAULT_INCREMENT_64 1442695040888963407ULL
DN_API DN_PCG32 DN_PCG32_Init(uint64_t seed)
{
DN_PCG32 result = {};
DN_PCG32_Next(&result);
result.state += seed;
DN_PCG32_Next(&result);
return result;
}
DN_API uint32_t DN_PCG32_Next(DN_PCG32 *rng)
{
uint64_t state = rng->state;
rng->state = state * DN_PCG_DEFAULT_MULTIPLIER_64 + DN_PCG_DEFAULT_INCREMENT_64;
// XSH-RR
uint32_t value = (uint32_t)((state ^ (state >> 18)) >> 27);
int rot = state >> 59;
return rot ? (value >> rot) | (value << (32 - rot)) : value;
}
DN_API uint64_t DN_PCG32_Next64(DN_PCG32 *rng)
{
uint64_t value = DN_PCG32_Next(rng);
value <<= 32;
value |= DN_PCG32_Next(rng);
return value;
}
DN_API uint32_t DN_PCG32_Range(DN_PCG32 *rng, uint32_t low, uint32_t high)
{
uint32_t bound = high - low;
uint32_t threshold = -(int32_t)bound % bound;
for (;;) {
uint32_t r = DN_PCG32_Next(rng);
if (r >= threshold)
return low + (r % bound);
}
}
DN_API float DN_PCG32_NextF32(DN_PCG32 *rng)
{
uint32_t x = DN_PCG32_Next(rng);
return (float)(int32_t)(x >> 8) * 0x1.0p-24f;
}
DN_API double DN_PCG32_NextF64(DN_PCG32 *rng)
{
uint64_t x = DN_PCG32_Next64(rng);
return (double)(int64_t)(x >> 11) * 0x1.0p-53;
}
DN_API void DN_PCG32_Advance(DN_PCG32 *rng, uint64_t delta)
{
uint64_t cur_mult = DN_PCG_DEFAULT_MULTIPLIER_64;
uint64_t cur_plus = DN_PCG_DEFAULT_INCREMENT_64;
uint64_t acc_mult = 1;
uint64_t acc_plus = 0;
while (delta != 0) {
if (delta & 1) {
acc_mult *= cur_mult;
acc_plus = acc_plus * cur_mult + cur_plus;
}
cur_plus = (cur_mult + 1) * cur_plus;
cur_mult *= cur_mult;
delta >>= 1;
}
rng->state = acc_mult * rng->state + acc_plus;
}
#if !defined(DN_NO_JSON_BUILDER)
// NOTE: DN_JSONBuilder ////////////////////////////////////////////////////////////////////////////
DN_API DN_JSONBuilder DN_JSONBuilder_Init(DN_Arena *arena, int spaces_per_indent)
{
DN_JSONBuilder result = {};
@@ -167,9 +71,10 @@ DN_API void DN_JSONBuilder_KeyValue(DN_JSONBuilder *builder, DN_Str8 key, DN_Str
DN_API void DN_JSONBuilder_KeyValueFV(DN_JSONBuilder *builder, DN_Str8 key, char const *value_fmt, va_list args)
{
DN_OSTLSTMem tmem = DN_OS_TLSTMem(builder->string_builder.arena);
DN_Str8 value = DN_Str8FromFmtVArena(tmem.arena, value_fmt, args);
DN_TCScratch scratch = DN_TCScratchBegin(&builder->string_builder.arena, 1);
DN_Str8 value = DN_Str8FromFmtVArena(scratch.arena, value_fmt, args);
DN_JSONBuilder_KeyValue(builder, key, value);
DN_TCScratchEnd(&scratch);
}
DN_API void DN_JSONBuilder_KeyValueF(DN_JSONBuilder *builder, DN_Str8 key, char const *value_fmt, ...)
@@ -246,4 +151,3 @@ DN_API void DN_JSONBuilder_BoolNamed(DN_JSONBuilder *builder, DN_Str8 key, bool
DN_Str8 value_string = value ? DN_Str8Lit("true") : DN_Str8Lit("false");
DN_JSONBuilder_KeyValueF(builder, key, "%.*s", value_string.size, value_string.data);
}
#endif // !defined(DN_NO_JSON_BUILDER)