More CCubeMaterial

Former-commit-id: 78022784ef

include/Kyoto/Basics/CCast.hpp

@@ -25,6 +25,16 @@ inline f32 ToReal32(register const u8& in) {
   }
   return r;
 }
+
+inline s16 FtoS(register f32 in) {
+  s16 a;
+  register s16* ptr = &a;
+
+  asm {
+            psq_st  in, 0(ptr), 1, OS_FASTCAST_S16
+  }
+  return *ptr;
+}
 #else
 inline u8 ToUint8(f32 in) {
   return static_cast<u8>(in);
@@ -32,6 +42,9 @@ inline u8 ToUint8(f32 in) {
 inline f32 ToReal32(u8 in) {
   return static_cast<f32>(in);
 }
+inline s16 FtoS(f32 in) {
+  return static_cast<s16>(in);
+}
 #endif
 } // namespace CCast
 

include/Kyoto/Graphics/CColor.hpp

@@ -5,6 +5,8 @@
 
 #include "Kyoto/Basics/CCast.hpp"
 
+#include <dolphin/gx/GXStruct.h>
+
 #ifdef __MWERKS__
 #pragma cpp_extensions on
 #endif
@@ -39,6 +41,7 @@ public:
   u8 GetBlueu8() const { return mB; }
   u8 GetAlphau8() const { return mA; }
   u16 ToRGB5A3() const;
+  GXColor ToGX(u32);
 
   static const CColor& Black();
   static const CColor& White();
@@ -72,4 +75,8 @@ private:
   static const CColor sOrangeColor;
 };
 
+#ifdef __MWERKS__
+#pragma cpp_extensions off
+#endif
+
 #endif // __CCOLOR_HPP__

include/Kyoto/Graphics/CCubeMaterial.hpp

@@ -11,7 +11,7 @@ extern CVector3f sPlayerPosition;
 class CCubeMaterial {
 public:
 private:
-  void SetupBlendMode(u32 blendFactors, const CModelFlags& flags, bool alphaTest);
+  static void SetupBlendMode(u32 blendFactors, const CModelFlags& flags, bool alphaTest);
 
   static CVector3f sViewingFrom;
 };

include/Kyoto/Graphics/CGX.hpp

@@ -5,7 +5,8 @@
 
 #include <stddef.h>
 
-#include "dolphin/gx.h"
+#include <dolphin/gx.h>
+#include <dolphin/mtx.h>
 
 class CGX {
 public:
@@ -124,6 +125,10 @@ public:
   static void ResetGXStates();
   static void ResetGXStatesFull(); // name?
 
+  static inline void LoadTexMtxImm(const f32 mtx[][4], unsigned long id, GXTexMtxType type) {
+    GXLoadTexMtxImm(const_cast<MtxPtr>(mtx), id, type);
+  }
+
   static GXColor GetChanAmbColor(EChannelId channel);
   static void GetFog(GXFogType* fogType, f32* fogStartZ, f32* fogEndZ, f32* fogNearZ, f32* fogFarZ, GXColor* fogColor);
 

include/Kyoto/Graphics/CGraphics.hpp

@@ -52,9 +52,13 @@ public:
   static void StreamEnd();
 
   static const CTransform4f& GetViewMatrix() { return mViewMatrix; }
+  static const CTransform4f& GetModelMatrix() { return mModelMatrix; }
+
+  static float GetSecondsMod900();
 
 private:
   static CTransform4f mViewMatrix;
+  static CTransform4f mModelMatrix;
 };
 
 #endif

include/Kyoto/Graphics/CModelFlags.hpp

@@ -63,7 +63,7 @@ public:
   static CModelFlags ColorModulate(const CColor& color);
 
 private:
-  u8 x0_blendMode;
+  s8 x0_blendMode;
   u8 x1_matSetIdx;
   u16 x2_flags;
   CColor x4_color;

include/Kyoto/Math/CMath.hpp

@@ -0,0 +1,16 @@
+#ifndef _CMATH_HPP
+#define _CMATH_HPP
+
+#include "types.h"
+
+class CMath {
+public:
+  static f32 FastCosR(f32 v);
+  static f32 FastSinR(f32 v);
+  static inline f32 FastFmod(f32 x, f32 y) {
+    s32 v = static_cast<s32>(x * (1.f / y));
+    return x - v * y;
+  }
+};
+
+#endif

include/Kyoto/Math/CTransform4f.hpp

@@ -5,6 +5,8 @@
 
 #include "Kyoto/Math/CVector3f.hpp"
 
+typedef const f32 (*ConstMtxPtr)[4];
+
 class CInputStream;
 class CMatrix3f;
 
@@ -13,6 +15,8 @@ public:
   CTransform4f() {
     // TODO
   }
+  CTransform4f(const CVector3f& m0, const CVector3f& m1, const CVector3f& m2, const CVector3f& pos)
+  : m0(m0), posX(pos.GetX()), m1(m1), posY(pos.GetY()), m2(m2), posZ(pos.GetZ()) {}
   CTransform4f(f32, f32, f32, f32, f32, f32, f32, f32, f32, f32, f32, f32);
   CTransform4f(const CInputStream& in);
   CTransform4f(const CMatrix3f& rotation, const CVector3f& translation);
@@ -23,36 +27,37 @@ public:
   CVector3f GetRight() const { return CVector3f(m0.GetX(), m1.GetX(), m2.GetX()); }
   CVector3f GetForward() const { return CVector3f(m0.GetY(), m1.GetY(), m2.GetY()); }
   CVector3f GetUp() const { return CVector3f(m0.GetZ(), m1.GetZ(), m2.GetZ()); }
+  ConstMtxPtr GetCStyleMatrix() const { return reinterpret_cast<ConstMtxPtr>(this); }
 
   CMatrix3f BuildMatrix3f() const;
-  // Get00__12CTransform4fCFv
+  f32 Get00() const { return m0.GetX(); }
-  // Get01__12CTransform4fCFv
+  f32 Get01() const { return m0.GetY(); }
-  // Get02__12CTransform4fCFv
+  f32 Get02() const { return m0.GetZ(); }
-  // Get03__12CTransform4fCFv
+  f32 Get03() const { return posX; }
-  // Get10__12CTransform4fCFv
+  f32 Get10() const { return m1.GetX(); }
-  // Get11__12CTransform4fCFv
+  f32 Get11() const { return m1.GetY(); }
-  // Get12__12CTransform4fCFv
+  f32 Get12() const { return m1.GetZ(); }
-  // Get13__12CTransform4fCFv
+  f32 Get13() const { return posY; }
-  // Get20__12CTransform4fCFv
+  f32 Get20() const { return m2.GetX(); }
-  // Get21__12CTransform4fCFv
+  f32 Get21() const { return m2.GetY(); }
-  // Get22__12CTransform4fCFv
+  f32 Get22() const { return m2.GetZ(); }
-  // Get23__12CTransform4fCFv
+  f32 Get23() const { return posZ; }
   // GetColumn__12CTransform4fCF5EDimX
   // GetColumn__12CTransform4fCF5EDimY
   // GetColumn__12CTransform4fCF5EDimZ
   // GetColumn__12CTransform4fCFi
   // GetCStyleMatrix__12CTransform4fCFv
   // GetInverse__12CTransform4fCFv
-  // GetQuickInverse__12CTransform4fCFv
+  CTransform4f GetQuickInverse() const;
   // GetRotation__12CTransform4fCFv
-  // GetRow__12CTransform4fCF5EDimX
+  inline const CVector3f& GetRow(EDimX dim) const { return m0; }
-  // GetRow__12CTransform4fCF5EDimY
+  inline const CVector3f& GetRow(EDimY dim) const { return m1; }
-  // GetRow__12CTransform4fCF5EDimZ
+  inline const CVector3f& GetRow(EDimZ dim) const { return m2; }
   // GetRow__12CTransform4fCFi
   // GetUp__12CTransform4fCFv
   // LookAt__12CTransform4fFRC9CVector3fRC9CVector3fRC9CVector3f
   // MakeRotationsBasedOnY__12CTransform4fFRC13CUnitVector3f
-  // MultiplyIgnoreTranslation__12CTransform4fCFRC12CTransform4f
+  CTransform4f MultiplyIgnoreTranslation(const CTransform4f& other) const;
   // Orthonormalize__12CTransform4fFv
   // Rotate__12CTransform4fCFRC9CVector3f
   // RotateLocalX__12CTransform4fFRC9CRelAngle
@@ -85,8 +90,8 @@ public:
   void AddTranslationZ(f32 z) { posZ += z; }
 
   CTransform4f& operator*=(const CTransform4f& other);
-  CTransform4f& operator*(const CTransform4f& vec);
+  CTransform4f operator*(const CTransform4f& vec) const;
-  CTransform4f& operator*(const CVector3f& vec);
+  CTransform4f operator*(const CVector3f& vec) const;
 
   static CTransform4f FromColumns(const CVector3f&, const CVector3f&, const CVector3f&, const CVector3f&);
   static const CTransform4f& Identity() { return sIdentity; }

include/Kyoto/Math/CVector3f.hpp

@@ -8,6 +8,10 @@
 class CInputStream;
 class COutputStream;
 
+enum EDimX { kDX };
+enum EDimY { kDY };
+enum EDimZ { kDZ };
+
 class CVector3f {
 public:
   CVector3f() : mX(0.f), mY(0.f), mZ(0.f) {}
@@ -37,8 +41,15 @@ public:
   // IsEqu__9CVector3fCFRC9CVector3ff
   // Lerp__9CVector3fFRC9CVector3fRC9CVector3ff
 
+  f32& operator[](EDimX dim) { return mX; }
+  f32& operator[](EDimY dim) { return mY; }
+  f32& operator[](EDimZ dim) { return mZ; }
+  f32 operator[](EDimX) const { return mX; }
+  f32 operator[](EDimY) const { return mY; }
+  f32 operator[](EDimZ) const { return mZ; }
+
   f32& operator[](s32 i) { return *(&mX + i); }
-  f32 operator[](s32 i) const { return *(&mX + i); }
+  // f32 operator[](s32 i) const { return *(&mX + i); }
   bool IsNonZero() const { return mX != 0.f || mY != 0.f || mZ != 0.f; }
 
   void DropZ() { mZ = 0.f; }

include/Kyoto/Streams/CInputStream.hpp

@@ -54,7 +54,7 @@ inline u32 cinput_stream_helper(const TType< u32 >& type, CInputStream& in) {
   return in.ReadLong();
 }
 template <>
-inline unsigned long cinput_stream_helper(const TType< unsigned long >& type, CInputStream& in) {
+inline unsigned int cinput_stream_helper(const TType< unsigned int >& type, CInputStream& in) {
   return in.ReadLong();
 }
 template <>

include/dolphin/mtx.h

@@ -0,0 +1,9 @@
+#ifndef DOLPHIN_MTX_H
+#define DOLPHIN_MTX_H
+
+#include <dolphin/types.h>
+
+typedef f32 Mtx[3][4];
+typedef f32 (*MtxPtr)[4];
+
+#endif

include/dolphin/os/OSFastCast.h

@@ -6,8 +6,10 @@ extern "C" {
 #endif
     
 #define OS_FASTCAST_U8 2
+#define OS_FASTCAST_S16 5
 
 #ifdef __cplusplus
 }
 #endif
+
 #endif

include/types.h

@@ -12,6 +12,8 @@ extern "C" {
 // Pointer to unknown, to be determined at a later date.
 typedef void* unkptr;
 
+#define SBig(x) x
+
 #ifdef __cplusplus
 }
 #endif

libc/string.h

@@ -7,8 +7,11 @@
 extern "C" {
 #endif
 
-void* memcpy(void* dest, const void* src, size_t num);
+#pragma section code_type ".init"
-void* memset(void* dest, int ch, size_t count);
+void* memcpy(void* dst, const void* src, size_t n);
+void* memset(void* dst, int val, size_t n);
+void __fill_mem(void* dst, int val, unsigned long n);
+#pragma section code_type
 
 size_t strlen(const char* s);
 char* strcpy(char* dest, const char* src);

src/Kyoto/Graphics/CCubeMaterial.cpp

@@ -1,5 +1,51 @@
 #include "Kyoto/Graphics/CCubeMaterial.hpp"
 
+#include "Kyoto/Graphics/CGX.hpp"
+#include "Kyoto/Graphics/CGraphics.hpp"
+#include "Kyoto/Math/CMath.hpp"
+
+#include <dolphin/mtx.h>
+
+inline void CGX::SetAlphaCompare(GXCompare comp0, u8 ref0, GXAlphaOp op, GXCompare comp1, u8 ref1) {
+  u32 flags = MaskAndShiftLeft(comp0, 7, 0) | MaskAndShiftLeft(ref0, 0xFF, 3) | MaskAndShiftLeft(op, 7, 11) |
+              MaskAndShiftLeft(comp1, 7, 14) | MaskAndShiftLeft(ref1, 0xFF, 17);
+  if (sGXState.x248_alphaCompare != flags) {
+    sGXState.x248_alphaCompare = flags;
+    GXSetAlphaCompare(comp0, ref0, op, comp1, ref1);
+    GXSetZCompLoc(comp0 == GX_ALWAYS);
+  }
+}
+inline void CGX::SetBlendMode(GXBlendMode mode, GXBlendFactor srcFac, GXBlendFactor dstFac, GXLogicOp op) {
+  u32 flags = MaskAndShiftLeft(mode, 3, 0) | MaskAndShiftLeft(srcFac, 7, 2) | MaskAndShiftLeft(dstFac, 7, 5) | MaskAndShiftLeft(op, 0xF, 8);
+  if (flags != sGXState.x56_blendMode) {
+    update_fog(flags);
+    sGXState.x56_blendMode = flags;
+    GXSetBlendMode(mode, srcFac, dstFac, op);
+  }
+}
+inline void CGX::SetTevOrder(GXTevStageID stageId, GXTexCoordID texCoord, GXTexMapID texMap, GXChannelID color) {
+  STevState& state = sGXState.x68_tevStates[stageId];
+  u32 flags = MaskAndShiftLeft(texCoord, 0xFF, 0) | MaskAndShiftLeft(texMap, 0xFF, 8) | MaskAndShiftLeft(color, 0xFF, 16);
+  if (state.x14_tevOrderFlags != flags) {
+    state.x14_tevOrderFlags = flags;
+    GXSetTevOrder(stageId, texCoord, texMap, color);
+  }
+}
+inline void CGX::SetTevKColorSel(GXTevStageID stageId, GXTevKColorSel sel) {
+  STevState& state = sGXState.x68_tevStates[stageId];
+  if (sel != state.x18_kColorSel) {
+    state.x18_kColorSel = sel;
+    GXSetTevKColorSel(stageId, sel);
+  }
+}
+inline void CGX::SetTevKAlphaSel(GXTevStageID stageId, GXTevKAlphaSel sel) {
+  STevState& state = sGXState.x68_tevStates[stageId];
+  if (sel != state.x19_kAlphaSel) {
+    state.x19_kAlphaSel = sel;
+    GXSetTevKAlphaSel(stageId, sel);
+  }
+}
+
 #include "Kyoto/Math/CTransform4f.hpp"
 
 CVector3f sPlayerPosition;
@@ -7,5 +53,173 @@ CVector3f CCubeMaterial::sViewingFrom;
 static CTransform4f sTextureProjectionTransform = CTransform4f::Identity();
 
 void CCubeMaterial::SetupBlendMode(u32 blendFactors, const CModelFlags& flags, bool alphaTest) {
-
+  GXBlendFactor newSrcFactor = static_cast< GXBlendFactor >(blendFactors & 0xFFFF);
+  GXBlendFactor newDstFactor = static_cast< GXBlendFactor >(blendFactors >> 0x10);
+  CModelFlags::ETrans blendMode = flags.GetTrans();
+  if (alphaTest) {
+    CGX::SetAlphaCompare(GX_GEQUAL, 64, GX_AOP_OR, GX_NEVER, 0);
+    newSrcFactor = GX_BL_ONE;
+    newDstFactor = GX_BL_ZERO;
+  } else {
+    CGX::SetAlphaCompare(GX_ALWAYS, 0, GX_AOP_OR, GX_ALWAYS, 0);
+  }
+  // TODO: how to check
+  if (blendMode > 4 && newSrcFactor == GX_BL_ONE) {
+    newSrcFactor = GX_BL_SRCALPHA;
+    if (newDstFactor == GX_BL_ZERO) {
+      newDstFactor = blendMode > 6 ? GX_BL_ONE : GX_BL_INVSRCALPHA;
+    }
+  }
+  CGX::SetBlendMode(GX_BM_BLEND, newSrcFactor, newDstFactor, GX_LO_CLEAR);
+}
+
+void HandleTev(s32 tevCur, const u32* materialDataCur, const u32* texMapTexCoordFlags, bool shadowMapsEnabled) {
+  const GXTevStageID stage = static_cast< GXTevStageID >(tevCur);
+  const u32 colorArgs = shadowMapsEnabled ? 0x7a04f : SBig(materialDataCur[0]);
+  const u32 alphaArgs = SBig(materialDataCur[1]);
+  const u32 colorOps = SBig(materialDataCur[2]);
+  const u32 alphaOps = SBig(materialDataCur[3]);
+
+  CGX::SetStandardDirectTev_Compressed(stage, colorArgs, alphaArgs, colorOps, alphaOps);
+
+  u32 tmtcFlags = SBig(*texMapTexCoordFlags);
+  u32 matFlags = SBig(materialDataCur[4]);
+  CGX::SetTevOrder(stage, static_cast< GXTexCoordID >(tmtcFlags & 0xFF), static_cast< GXTexMapID >(tmtcFlags >> 8 & 0xFF),
+                   static_cast< GXChannelID >(matFlags & 0xFF));
+  CGX::SetTevKColorSel(stage, static_cast< GXTevKColorSel >(matFlags >> 0x8 & 0xFF));
+  CGX::SetTevKAlphaSel(stage, static_cast< GXTevKAlphaSel >(matFlags >> 0x10 & 0xFF));
+}
+
+u32 HandleAnimatedUV(const u32* uvAnim, GXTexMtx texMtx, GXPTTexMtx ptTexMtx) {
+  static const Mtx postMtx = {
+      {0.5f, 0.0f, 0.0f, 0.5f},
+      {0.0f, 0.0f, 0.5f, 0.5f},
+      {0.0f, 0.0f, 0.0f, 1.0f},
+  };
+  static Mtx translateMtx = {
+      {0.5f, 0.0f, 0.0f, 0.5f},
+      {0.0f, 0.0f, 0.5f, 0.5f},
+      {0.0f, 0.0f, 0.0f, 1.0f},
+  };
+  u32 type = SBig(*uvAnim);
+  const f32* params = reinterpret_cast< const f32* >(uvAnim + 1);
+  switch (type) {
+  case 0: {
+    CTransform4f xf = CGraphics::GetViewMatrix().GetQuickInverse().MultiplyIgnoreTranslation(CGraphics::GetModelMatrix());
+    xf.SetTranslation(CVector3f::Zero());
+    CGX::LoadTexMtxImm(xf.GetCStyleMatrix(), texMtx, GX_MTX3x4);
+    CGX::LoadTexMtxImm(postMtx, ptTexMtx, GX_MTX3x4);
+    return 1;
+  }
+  case 1: {
+    CTransform4f xf = CGraphics::GetViewMatrix().GetQuickInverse() * CGraphics::GetModelMatrix();
+    CGX::LoadTexMtxImm(xf.GetCStyleMatrix(), texMtx, GX_MTX3x4);
+    CGX::LoadTexMtxImm(postMtx, ptTexMtx, GX_MTX3x4);
+    return 1;
+  }
+  case 2: {
+    const f32 f1 = SBig(params[0]);
+    const f32 f2 = SBig(params[1]);
+    const f32 f3 = SBig(params[2]);
+    const f32 f4 = SBig(params[3]);
+    const f32 seconds = CGraphics::GetSecondsMod900();
+    translateMtx[0][3] = f1 + seconds * f3;
+    translateMtx[1][3] = f2 + seconds * f4;
+    CGX::LoadTexMtxImm(translateMtx, texMtx, GX_MTX3x4);
+    return 5;
+  }
+  case 3: {
+    const f32 f1 = SBig(params[0]);
+    const f32 f2 = SBig(params[1]);
+    const f32 seconds = CGraphics::GetSecondsMod900();
+    const f32 angle = f1 + seconds * f2;
+    const f32 asin = CMath::FastSinR(angle);
+    const f32 acos = CMath::FastCosR(angle);
+    Mtx mtx = {
+        {acos, -asin, 0.f, (1.f - (acos - asin)) * 0.5f},
+        {asin, acos, 0.f, (1.f - (asin + acos)) * 0.5f},
+        {0.f, 0.f, 1.f, 0.f},
+    };
+    CGX::LoadTexMtxImm(mtx, texMtx, GX_MTX3x4);
+    return 3;
+  }
+  case 4:
+  case 5: {
+    const f32 f1 = SBig(params[0]);
+    const f32 f2 = SBig(params[1]);
+    const f32 f3 = SBig(params[2]);
+    const f32 f4 = SBig(params[3]);
+    const f32 value = (f4 + CGraphics::GetSecondsMod900()) * f1 * f3;
+    const f32 fmod = CMath::FastFmod(value, 1.f);
+    const f32 fs = CCast::FtoS(fmod * f2);
+    const f32 v2 = fs * f3;
+    if (type == 4) {
+      translateMtx[0][3] = v2;
+      translateMtx[1][3] = 0.f;
+    } else {
+      translateMtx[0][3] = 0.f;
+      translateMtx[1][3] = v2;
+    }
+    CGX::LoadTexMtxImm(translateMtx, texMtx, GX_MTX3x4);
+    return 5;
+  }
+  case 6: {
+    static const Mtx sTexMtx = {
+        {0.f, 0.f, 0.f, 0.f},
+        {0.f, 0.f, 0.f, 0.f},
+        {0.f, 0.f, 0.f, 0.f},
+    };
+    static const Mtx sPtMtx = {
+        {0.5f, 0.f, 0.f, 0.f},
+        {0.f, 0.f, 0.5f, 0.f},
+        {0.f, 0.f, 0.f, 1.f},
+    };
+    const CTransform4f& mm = CGraphics::GetModelMatrix();
+    Mtx tmpTexMtx;
+    Mtx tmpPtMtx;
+    __memcpy(&tmpTexMtx, &sTexMtx, sizeof(Mtx));
+    const CVector3f& dx = mm.GetRow(kDX);
+    tmpTexMtx[0][0] = mm.Get00();
+    tmpTexMtx[0][1] = mm.Get01();
+    tmpTexMtx[0][2] = mm.Get02();
+    tmpTexMtx[1][0] = mm.Get10();
+    tmpTexMtx[1][1] = mm.Get11();
+    tmpTexMtx[1][2] = mm.Get12();
+    tmpTexMtx[2][0] = mm.Get20();
+    tmpTexMtx[2][1] = mm.Get21();
+    tmpTexMtx[2][2] = mm.Get22();
+    __memcpy(&tmpPtMtx, &sPtMtx, sizeof(Mtx));
+    tmpPtMtx[0][3] = mm.Get03() * 0.05f;
+    tmpPtMtx[1][3] = mm.Get13() * 0.05f;
+    CGX::LoadTexMtxImm(tmpTexMtx, texMtx, GX_MTX3x4);
+    CGX::LoadTexMtxImm(tmpPtMtx, ptTexMtx, GX_MTX3x4);
+    return 1;
+  }
+  case 7: {
+    static const Mtx sPtMtx = {
+        {0.f, 0.f, 0.f, 0.f},
+        {0.f, 0.f, 0.f, 0.f},
+        {0.f, 0.f, 0.f, 1.f},
+    };
+    const CTransform4f& vm = CGraphics::GetViewMatrix();
+    CTransform4f xf = CGraphics::GetViewMatrix().GetQuickInverse().MultiplyIgnoreTranslation(CGraphics::GetModelMatrix());
+    f32 v = SBig(params[0]) / 2.f;
+    f32 v03 = 0.025f * (vm.Get03() + vm.Get13()) * SBig(params[1]);
+    f32 v13 = 0.05f * vm.Get23() * SBig(params[1]);
+    f32 v03f = CMath::FastFmod(v03, 1.f);
+    f32 v13f = CMath::FastFmod(v13, 1.f);
+    xf.SetTranslation(CVector3f::Zero());
+    Mtx tmpPtMtx;
+    __memcpy(&tmpPtMtx, &sPtMtx, sizeof(Mtx));
+    tmpPtMtx[0][0] = v;
+    tmpPtMtx[0][3] = v03f;
+    tmpPtMtx[1][2] = v;
+    tmpPtMtx[1][3] = v13f;
+    CGX::LoadTexMtxImm(xf.GetCStyleMatrix(), texMtx, GX_MTX3x4);
+    CGX::LoadTexMtxImm(tmpPtMtx, ptTexMtx, GX_MTX3x4);
+    return 3;
+  }
+  default:
+    return 0;
+  }
 }