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Added Virtual File System support

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snarmph 2024-12-05 18:15:05 +01:00
parent 363c4f19cb
commit 01f4ad7f62
18 changed files with 4582 additions and 64 deletions
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24
bits.h
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@ -3,6 +3,7 @@
#include "collatypes.h"
uint32 bitsCtz(uint32 v);
uint32 bitsNextPow2(uint32 v);
// == INLINE IMPLEMENTATION ==============================================================
@ -13,6 +14,9 @@ uint32 bitsCtz(uint32 v);
#elif COLLA_GCC || COLLA_CLANG || COLLA_EMC
#define BITS_WIN 0
#define BITS_LIN 1
#elif COLLA_TCC
#define BITS_WIN 0
#define BITS_LIN 0
#else
#error "bits header not supported on this compiler"
#endif
@ -24,11 +28,27 @@ inline uint32 bitsCtz(uint32 v) {
return v ? __builtin_ctz(v) : 0;
#elif BITS_WIN
uint32 trailing = 0;
return _BitScanForward((unsigned long *)&trailing, v) ? trailing : 0;
return _BitScanForward((unsigned long *)&trailing, v) ? trailing : 32;
#else
return 0;
if (v == 0) return 0;
for (uint32 i = 0; i < 32; ++i) {
if (v & (1 << i)) return i;
}
return 32;
#endif
}
inline uint32 bitsNextPow2(uint32 v) {
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v++;
return v;
}
#undef BITS_WIN
#undef BITS_LIN