First proper commit.

src/code/TwoHeadArena.c

@@ -0,0 +1,172 @@
+#include <global.h>
+
+void THGA_Ct(TwoHeadGfxArena* thga, Gfx* start, u32 size)
+{
+    THA_Ct((TwoHeadArena*)thga, start, size);
+}
+
+void THGA_Dt(TwoHeadGfxArena* thga)
+{
+    THA_Dt((TwoHeadArena*)thga);
+}
+
+u32 THGA_IsCrash(TwoHeadGfxArena* thga)
+{
+    return THA_IsCrash((TwoHeadArena*)thga);
+}
+
+void THGA_Init(TwoHeadGfxArena* thga)
+{
+    THA_Init((TwoHeadArena*)thga);
+}
+
+s32 THGA_GetSize(TwoHeadGfxArena* thga)
+{
+    return THA_GetSize((TwoHeadArena*)thga);
+}
+
+Gfx* THGA_GetHead(TwoHeadGfxArena* thga)
+{
+    return THA_GetHead((TwoHeadArena*)thga);
+}
+
+void THGA_SetHead(TwoHeadGfxArena* thga, Gfx* start)
+{
+    THA_SetHead((TwoHeadArena*)thga, start);
+}
+
+Gfx* THGA_GetTail(TwoHeadGfxArena* thga)
+{
+    return THA_GetTail((TwoHeadArena*)thga);
+}
+
+Gfx* THGA_AllocStartArray8(TwoHeadGfxArena* thga, u32 count)
+{
+    return THA_AllocStart((TwoHeadArena*)thga, count * 8);
+}
+
+Gfx* THGA_AllocStart8(TwoHeadGfxArena* thga)
+{
+    return THGA_AllocStartArray8(thga, 1);
+}
+
+Gfx* THGA_AllocStart8Wrapper(TwoHeadGfxArena* thga)
+{
+    return THGA_AllocStart8(thga);
+}
+
+Gfx* THGA_AllocEnd(TwoHeadGfxArena* thga, u32 size)
+{
+    return THA_AllocEnd((TwoHeadArena*)thga, size);
+}
+
+Gfx* THGA_AllocEndArray64(TwoHeadGfxArena* thga, u32 count)
+{
+    return THGA_AllocEnd(thga, count * 0x40);
+}
+
+Gfx* THGA_AllocEnd64(TwoHeadGfxArena* thga)
+{
+    return THGA_AllocEnd(thga, 0x40);
+}
+
+Gfx* THGA_AllocEndArray16(TwoHeadGfxArena* thga, u32 count)
+{
+    return THGA_AllocEnd(thga, count * 0x10);
+}
+
+Gfx* THGA_AllocEnd16(TwoHeadGfxArena* thga)
+{
+    return THGA_AllocEnd(thga, 0x10);
+}
+
+
+
+
+
+void* THA_GetHead(TwoHeadArena* tha)
+{
+    return tha->head;
+}
+
+void THA_SetHead(TwoHeadArena* tha, void* start)
+{
+    tha->head = start;
+}
+
+void* THA_GetTail(TwoHeadArena* tha)
+{
+    return tha->tail;
+}
+
+void* THA_AllocStart(TwoHeadArena* tha, u32 size)
+{
+    void* start = tha->head;
+    tha->head += size;
+    return start;
+}
+
+void* THA_AllocStart1(TwoHeadArena* tha)
+{
+    return THA_AllocStart(tha, 1);
+}
+
+void* THA_AllocEnd(TwoHeadArena* tha, u32 size)
+{
+    u32 mask;
+    u32* temp;
+
+    if (size == 8)
+        mask = ~7;
+    else if (size == 4 || size == 12)
+        mask = ~3;
+    else if (size == 2 || size == 6 || size == 10 || size == 12 || size == 14)
+        mask = ~1;
+    else
+        mask = (size >= 0x10) ? ~0xF : 0;
+
+    temp = (u32*)&tha->tail; // required to match
+    return tha->tail = (void*)(((*temp & mask) - size) & mask);
+}
+
+void* THA_AllocEndAlign16(TwoHeadArena *tha, u32 size)
+{
+    void* ret = (void*)(u32)((((u32)tha->tail & ~0xF) - size) & ((~(0xF & 0xFFFFFFFFFFFFFFFF)) & 0xFFFFFFFFu)); // required to match
+    tha->tail = ret;
+    return ret;
+}
+
+void* THA_AllocEndAlign(TwoHeadArena* tha, u32 size, u32 mask)
+{
+    void* ret = (void*)((((u32)tha->tail & mask) - size) & mask);
+    tha->tail = ret;
+    return ret;
+}
+
+s32 THA_GetSize(TwoHeadArena* tha)
+{
+    return tha->tail - tha->head;
+}
+
+u32 THA_IsCrash(TwoHeadArena* tha)
+{
+    return THA_GetSize(tha) < 0;
+}
+
+void THA_Init(TwoHeadArena* tha)
+{
+    tha->head = tha->bufp;
+    tha->tail = tha->bufp + tha->size;
+}
+
+void THA_Ct(TwoHeadArena* tha, void* ptr, u32 size)
+{
+    tha->bufp = ptr;
+    tha->size = size;
+    THA_Init(tha);
+}
+
+void THA_Dt(TwoHeadArena* tha)
+{
+    bzero(tha, sizeof(TwoHeadArena));
+}