C++ StackHandler::ThrowError方法代码示例

static int getInstanceVarInfo(StackHandler & sa,VarRefPtr & vr,SQUserPointer & data) {
  HSQOBJECT ho = sa.GetObjectHandle(1);
  SquirrelObject instance(ho);
  const SQChar * el = sa.GetString(2);
  ScriptStringVar256 varNameTag;
  getVarNameTag(varNameTag,sizeof(varNameTag),el);
  SQUserPointer ivrData=0;
  if (!instance.RawGetUserData(varNameTag,&ivrData)) {
    return sa.ThrowError(_SC("getInstanceVarInfo: Could not retrieve UserData")); // Results in variable not being found error.
  }
  vr = (VarRefPtr)ivrData;

  char * up;
  if (!(vr->m_access & (VAR_ACCESS_STATIC|VAR_ACCESS_CONSTANT))) {
    SQUserPointer typetag; 
    instance.GetTypeTag(&typetag);

#if defined(SQ_USE_CLASS_INHERITANCE) 
    if (typetag != vr->instanceType) {
      SquirrelObject typeTable = instance.GetValue(SQ_CLASS_OBJECT_TABLE_NAME);
      up = (char *)typeTable.GetUserPointer(INT((size_t)vr->instanceType)); // <TODO> 64-bit compatible version.
      if (!up) {
        throw SquirrelError(_SC("Invalid Instance Type"));
      }
    } else {
      up = (char *)instance.GetInstanceUP(0);
    } // if

#elif defined(SQ_USE_CLASS_INHERITANCE_SIMPLE)
    ClassTypeBase *ctb = (ClassTypeBase*)vr->instanceType;
    up = (char *)instance.GetInstanceUP(0);
    // Walk base classes until type tag match, adjust for inheritence offset
    while(ctb && typetag!=ctb) {
      up = (char*)up - ctb->m_offset;
      ctb = ctb->m_pbase;
    }
    if (!ctb) {
      throw SquirrelError(_SC("Invalid Instance Type"));
    }
#else
    up = (char *)instance.GetInstanceUP(0);
#endif

#ifdef SQPLUS_SMARTPOINTER_OPT
#define SQPLUS_SMARTPOINTER_INSTANCE_VARINFO
#include "SqPlusSmartPointer.h"
#endif

    up += (size_t)vr->offsetOrAddrOrConst;         // Offset
  } else {
    up = (char *)vr->offsetOrAddrOrConst; // Address
  } // if
  data = up;
  return SQ_OK;
} // getInstanceVarInfo

static int getInstanceVarInfo(StackHandler & sa,VarRefPtr & vr,SQUserPointer & data) {
  HSQOBJECT ho = sa.GetObjectHandle(1);
  SquirrelObject instance(ho);
#ifdef _DEBUG
  SQObjectType type = (SQObjectType)sa.GetType(2);
#endif
  const SQChar * el = sa.GetString(2);
  ScriptStringVar256 varNameTag;
  getVarNameTag(varNameTag,sizeof(varNameTag),el);
  SQUserPointer ivrData=0;
  if (!instance.RawGetUserData(varNameTag,&ivrData)) {
//    throw SquirrelError("getInstanceVarInfo: Could not retrieve UserData");
    return sa.ThrowError(_T("getInstanceVarInfo: Could not retrieve UserData")); // Results in variable not being found error.
  } // if
  vr = (VarRefPtr)ivrData;
  unsigned char * up;
  if (!(vr->access & (VAR_ACCESS_STATIC|VAR_ACCESS_CONSTANT))) {
#ifdef SQ_USE_CLASS_INHERITANCE
    SQUserPointer typetag; instance.GetTypeTag(&typetag);
    if (typetag != vr->instanceType) {
      SquirrelObject typeTable = instance.GetValue(SQ_CLASS_OBJECT_TABLE_NAME);
      up = (unsigned char *)typeTable.GetUserPointer(INT((size_t)vr->instanceType)); // <TODO> 64-bit compatible version.
      if (!up) {
#if defined( MONASQ )
        return sa.ThrowError(_T("Invalid Instance Type"));
#else
        throw SquirrelError(_T("Invalid Instance Type"));
#endif
      } // if
    } else {
      up = (unsigned char *)instance.GetInstanceUP(0);
    } // if
#else
    up = (unsigned char *)instance.GetInstanceUP(0);
#endif
    up += (size_t)vr->offsetOrAddrOrConst;         // Offset
  } else {
    up = (unsigned char *)vr->offsetOrAddrOrConst; // Address
  } // if
  data = up;
  return SQ_OK;
} // getInstanceVarInfo

static int getVarInfo(StackHandler & sa,VarRefPtr & vr) {
  HSQOBJECT htable = sa.GetObjectHandle(1);
  SquirrelObject table(htable);
  const SQChar * el = sa.GetString(2);
  ScriptStringVar256 varNameTag;
  getVarNameTag(varNameTag,sizeof(varNameTag),el);
  SQUserPointer data=0;
  if (!table.RawGetUserData(varNameTag,&data)) {
    return sa.ThrowError(_SC("getVarInfo: Could not retrieve UserData")); // Results in variable not being found error.
  }
  vr = (VarRefPtr)data;
  return SQ_OK;
} // getVarInfo

static SQInteger getVarInfo(StackHandler & sa,VarRefPtr & vr) {
  HSQOBJECT htable = sa.GetObjectHandle(1);
  SquirrelObject table(htable);
#ifdef _DEBUG
  SQObjectType type = (SQObjectType)sa.GetType(2);
#endif
  const SQChar * el = sa.GetString(2);
  ScriptStringVar256 varNameTag;
  getVarNameTag(varNameTag,sizeof(varNameTag),el);
  SQUserPointer data=0;
  if (!table.RawGetUserData(varNameTag,&data)) {
//    throw SquirrelError("getVarInfo: Could not retrieve UserData");
    return sa.ThrowError(sqT("getVarInfo: Could not retrieve UserData")); // Results in variable not being found error.
  } // if
  vr = (VarRefPtr)data;
  return SQ_OK;
} // getVarInfo

static int setVar(StackHandler & sa,VarRef * vr,void * data) {
  if (vr->access & (VAR_ACCESS_READ_ONLY|VAR_ACCESS_CONSTANT)) {
    ScriptStringVar256 msg;
    const SQChar * el = sa.GetString(2);
    SCSNPRINTF(msg.s,sizeof(msg),_T("setVar(): Cannot write to constant: %s"),el);
#if defined( MONASQ )
    return sa.ThrowError(msg.s);
#else
    throw SquirrelError(msg.s);
#endif
  } // if
  switch (vr->type) {
  case TypeInfo<INT>::TypeID: {
    INT * val = (INT *)data; // Address
    if (val) {
      *val = sa.GetInt(3);
      return sa.Return(*val);
    } // if
    break;
  } // case
  case TypeInfo<FLOAT>::TypeID: {
    FLOAT * val = (FLOAT *)data; // Address
    if (val) {
      *val = sa.GetFloat(3);
      return sa.Return(*val);
    } // if
    break;
  } // case
  case TypeInfo<bool>::TypeID: {
    bool * val = (bool *)data; // Address
    if (val) {
      *val = sa.GetBool(3) ? true : false;
      return sa.Return(*val);
    } // if
    break;
  } // case
  case VAR_TYPE_INSTANCE: {
    HSQUIRRELVM v = sa.GetVMPtr();
    // vr->copyFunc is the LHS variable type: the RHS var's type is ClassType<>::type() (both point to ClassType<>::copy()).
    // src will be null if the LHS and RHS types don't match.
    SQUserPointer src = sa.GetInstanceUp(3,(SQUserPointer)vr->copyFunc); // Effectively performs: ClassType<>::type() == ClassType<>getCopyFunc().
#if defined( MONASQ )
    if (!src) return sa.ThrowError(_T("INSTANCE type assignment mismatch"));
#else
    if (!src) throw SquirrelError(_T("INSTANCE type assignment mismatch"));
#endif
    vr->copyFunc(data,src);
#if 0 // Return an instance on the stack (allocates memory)
    if (!CreateNativeClassInstance(sa.GetVMPtr(),vr->typeName,data,0)) { // data = address
      ScriptStringVar256 msg;
      SCSNPRINTF(msg.s,sizeof(msg),_T("getVar(): Could not create instance: %s"),vr->typeName);
      throw SquirrelError(msg.s);
    } // if
    return 1;
#else // Don't return on stack.
    return 0;
#endif
  }
  case TypeInfo<SQUserPointer>::TypeID: {
    ScriptStringVar256 msg;
    const SQChar * el = sa.GetString(2);
    SCSNPRINTF(msg.s,sizeof(msg),_T("setVar(): Cannot write to an SQUserPointer: %s"),el);
#if defined( MONASQ )
    return sa.ThrowError(msg.s);
#else
    throw SquirrelError(msg.s);
#endif
  } // case
  case TypeInfo<ScriptStringVarBase>::TypeID: {
    ScriptStringVarBase * val = (ScriptStringVarBase *)data; // Address
    if (val) {
      const SQChar * strVal = sa.GetString(3);
      if (strVal) {
        *val = strVal;
        return sa.Return(val->s);
      } // if
    } // if
    break;
  } // case
  } // switch
  return SQ_ERROR;
} // setVar

static int getVar(StackHandler & sa,VarRef * vr,void * data) {
  switch (vr->type) {
  case TypeInfo<INT>::TypeID: {
    if (!(vr->access & VAR_ACCESS_CONSTANT)) {
      INT * val = (INT *)data; // Address
      if (val) {
        return sa.Return(*val);
      } // if
    } else {
      INT * val = (INT *)&data; // Constant value
      return sa.Return(*val);
    } // if
    break;
  } // case
  case TypeInfo<FLOAT>::TypeID: {
    if (!(vr->access & VAR_ACCESS_CONSTANT)) {
      FLOAT * val = (FLOAT *)data; // Address
      if (val) {
        return sa.Return(*val);
      } // if
    } else {
      FLOAT * val = (FLOAT *)&data; // Constant value
      return sa.Return(*val);
    } // if
    break;
  } // case
  case TypeInfo<bool>::TypeID: {
    if (!(vr->access & VAR_ACCESS_CONSTANT)) {
      bool * val = (bool *)data; // Address
      if (val) {
        return sa.Return(*val);
      } // if
    } else {
      bool * val = (bool *)&data; // Constant value
      return sa.Return(*val);
    } // if
    break;
  } // case
  case VAR_TYPE_INSTANCE:
    if (!CreateNativeClassInstance(sa.GetVMPtr(),vr->typeName,data,0)) { // data = address. Allocates memory.
      ScriptStringVar256 msg;
      SCSNPRINTF(msg.s,sizeof(msg),_T("getVar(): Could not create instance: %s"),vr->typeName);
#if defined( MONASQ )
      return sa.ThrowError(msg.s);
#else
      throw SquirrelError(msg.s);
#endif
    } // if
    return 1;
  case TypeInfo<SQUserPointer>::TypeID: {
    return sa.Return(data); // The address of member variable, not the variable itself.
  } // case
  case TypeInfo<ScriptStringVarBase>::TypeID: {
    if (!(vr->access & VAR_ACCESS_CONSTANT)) {
      ScriptStringVarBase * val = (ScriptStringVarBase *)data; // Address
      if (val) {
        return sa.Return(val->s);
      } // if
    } else {
#if defined( MONASQ )
      return sa.ThrowError(_T("getVar(): Invalid type+access: 'ScriptStringVarBase' with VAR_ACCESS_CONSTANT (use VAR_ACCESS_READ_ONLY instead)"));
#else
      throw SquirrelError(_T("getVar(): Invalid type+access: 'ScriptStringVarBase' with VAR_ACCESS_CONSTANT (use VAR_ACCESS_READ_ONLY instead)"));
#endif
    } // if
    break;
  } // case
  case TypeInfo<const SQChar *>::TypeID: {
    if (!(vr->access & VAR_ACCESS_CONSTANT)) {
#if defined( MONASQ )
      return sa.ThrowError(_T("getVar(): Invalid type+access: 'const SQChar *' without VAR_ACCESS_CONSTANT"));
#else
      throw SquirrelError(_T("getVar(): Invalid type+access: 'const SQChar *' without VAR_ACCESS_CONSTANT"));
#endif
    } else {
      return sa.Return((const SQChar *)data); // Address
    } // if
    break;
  } // case
  } // switch
  return SQ_ERROR;
} // getVar