#include "tclCompile.h"

/*
 * Structure used to contain all the information needed about a call frame
 * used in a procedure-like method.
 */

typedef struct PMFrameData {
    CallFrame *framePtr;	/* Reference to the call frame itself (it's
				 * actually allocated on the Tcl stack). */
    ProcErrorProc *errProc;	/* The error handler for the body. */
    Tcl_Obj *nameObj;		/* The "name" of the command. Only used for a
				 * few moments, so not reference. */
} PMFrameData;

/*
 * Structure used to pass information about variable resolution to the
 * on-the-ground resolvers used when working with resolved compiled variables.
 */

typedef struct OOResVarInfo {
    Tcl_ResolvedVarInfo info;	/* "Type" information so that the compiled
				 * variable can be linked to the namespace
				 * variable at the right time. */
    Tcl_Obj *variableObj;	/* The name of the variable. */
    Tcl_Var cachedObjectVar;	/* TODO: When to flush this cache? Can class
				 * variables be cached? */
} OOResVarInfo;

	goto populate;
    }
    if (!oPtr->methodsPtr) {
	oPtr->methodsPtr = (Tcl_HashTable *)ckalloc(sizeof(Tcl_HashTable));
	Tcl_InitObjHashTable(oPtr->methodsPtr);
	oPtr->flags &= ~USE_CLASS_CACHE;
    }
    hPtr = Tcl_CreateHashEntry(oPtr->methodsPtr, (char *)nameObj, &isNew);
    if (isNew) {
	mPtr = (Method *)ckalloc(sizeof(Method));
	mPtr->namePtr = nameObj;
	mPtr->refCount = 1;
	Tcl_IncrRefCount(nameObj);
	Tcl_SetHashValue(hPtr, mPtr);
    } else {

    const Tcl_MethodType *typePtr,
				/* The type of method this is, which defines
				 * how to invoke, delete and clone the
				 * method. */
    void *clientData)		/* Some data associated with the particular
				 * method to be created. */
{
    Class *clsPtr = (Class *)cls;
    Method *mPtr;
    Tcl_HashEntry *hPtr;
    int isNew;

    if (nameObj == NULL) {
	mPtr = (Method *)ckalloc(sizeof(Method));
	mPtr->namePtr = NULL;
	mPtr->refCount = 1;
	goto populate;
    }
    hPtr = Tcl_CreateHashEntry(&clsPtr->classMethods, (char *)nameObj, &isNew);
    if (isNew) {
	mPtr = (Method *)ckalloc(sizeof(Method));
	mPtr->refCount = 1;
	mPtr->namePtr = nameObj;
	Tcl_IncrRefCount(nameObj);
	Tcl_SetHashValue(hPtr, mPtr);
    } else {

	ckfree(mPtr);
    }
}

/*
 * ----------------------------------------------------------------------
 *
 * TclOODefineBasicMethods --
 *
 *	Helper that makes it cleaner to create very simple methods during
 *	basic system initialization. Not suitable for general use.
 *
 * ----------------------------------------------------------------------
 */

void
TclOODefineBasicMethods(

    Class *clsPtr,		/* Class to attach the methods to. */
    const DeclaredClassMethod *dcmAry)
				/* Static table of method definitions. */
{
    int i;

    for (i = 0 ; dcmAry[i].name ; i++) {
	Tcl_Obj *namePtr = Tcl_NewStringObj(dcmAry[i].name, TCL_AUTO_LENGTH);


	Tcl_NewMethod(NULL, (Tcl_Class)clsPtr, namePtr,
		(dcmAry[i].isPublic ? PUBLIC_METHOD : 0),
		&dcmAry[i].definition, NULL);
	Tcl_BounceRefCount(namePtr);
    }
}

/*
 * ----------------------------------------------------------------------
 *
 * TclOONewProcInstanceMethod --
 *

    Tcl_Obj *bodyObj,		/* The body of the method, which must not be
				 * NULL. */
    ProcedureMethod **pmPtrPtr)	/* Place to write pointer to procedure method
				 * structure to allow for deeper tuning of the
				 * structure's contents. NULL if caller is not
				 * interested. */
{
    Tcl_Size argsLen;
    ProcedureMethod *pmPtr;
    Tcl_Method method;

    if (TclListObjLength(interp, argsObj, &argsLen) != TCL_OK) {
	return NULL;
    }
    pmPtr = AllocProcedureMethodRecord(flags);

    Tcl_Obj *bodyObj,		/* The body of the method, which must not be
				 * NULL. */
    ProcedureMethod **pmPtrPtr)	/* Place to write pointer to procedure method
				 * structure to allow for deeper tuning of the
				 * structure's contents. NULL if caller is not
				 * interested. */
{
    Tcl_Size argsLen;		/* TCL_INDEX_NONE => delete argsObj before exit */
    ProcedureMethod *pmPtr;
    const char *procName;
    Tcl_Method method;

    if (argsObj == NULL) {
	argsLen = TCL_INDEX_NONE;
	TclNewObj(argsObj);
	Tcl_IncrRefCount(argsObj);
	procName = "<destructor>";
    } else if (TclListObjLength(interp, argsObj, &argsLen) != TCL_OK) {
	return NULL;
    } else {
	procName = (nameObj==NULL ? "<constructor>" : TclGetString(nameObj));
    }

    pmPtr = AllocProcedureMethodRecord(flags);
    method = TclOOMakeProcMethod(interp, clsPtr, flags, nameObj, procName,
	    argsObj, bodyObj, &procMethodType, pmPtr, &pmPtr->procPtr);

    if (argsLen == TCL_INDEX_NONE) {
	Tcl_DecrRefCount(argsObj);
    }
    if (method == NULL) {
	ckfree(pmPtr);
    } else if (pmPtrPtr != NULL) {
	*pmPtrPtr = pmPtr;
    }

		    && (context.nline >= 4) && (context.line[3] >= 0)) {
		int isNew;
		CmdFrame *cfPtr = (CmdFrame *)ckalloc(sizeof(CmdFrame));
		Tcl_HashEntry *hPtr;

		cfPtr->level = -1;
		cfPtr->type = context.type;
		cfPtr->line = (Tcl_Size *)ckalloc(sizeof(Tcl_Size));
		cfPtr->line[0] = context.line[3];
		cfPtr->nline = 1;
		cfPtr->framePtr = NULL;
		cfPtr->nextPtr = NULL;

		cfPtr->data.eval.path = context.data.eval.path;
		Tcl_IncrRefCount(cfPtr->data.eval.path);

		cfPtr->cmd = NULL;
		cfPtr->len = 0;

		hPtr = Tcl_CreateHashEntry(iPtr->linePBodyPtr,
			(char *)procPtr, &isNew);
		Tcl_SetHashValue(hPtr, cfPtr);
	    }

	    /*
	     * 'context' is going out of scope; account for the reference that
	     * it's holding to the path name.
	     */

				 * _must not_ be NULL. */
    Tcl_Obj *argsObj,		/* The formal argument list for the method,
				 * which _must not_ be NULL. */
    Tcl_Obj *bodyObj,		/* The body of the method, which _must not_ be
				 * NULL. */
    const Tcl_MethodType *typePtr,
				/* The type of the method to create. */
    void *clientData,		/* The per-method type-specific data. */
    Proc **procPtrPtr)		/* A pointer to the variable in which to write
				 * the procedure record reference. Presumably
				 * inside the structure indicated by the
				 * pointer in clientData. */
{
    Interp *iPtr = (Interp *) interp;
    Proc *procPtr;

				 * call frame's lifetime). */

    /*
     * If the object namespace (or interpreter) were deleted, we just skip to
     * the next thing in the chain.
     */

    if (TclOOObjectDestroyed(((CallContext *)context)->oPtr)
	    || Tcl_InterpDeleted(interp)) {

	return TclNRObjectContextInvokeNext(interp, context, objc, objv,
		Tcl_ObjectContextSkippedArgs(context));
    }

    /*
     * Finishes filling out the extra frame info so that [info frame] works if
     * that is not already set up.

}

static int
ProcedureMethodVarResolver(
    Tcl_Interp *interp,
    const char *varName,
    Tcl_Namespace *contextNs,
    TCL_UNUSED(int) /*flags*/,	// Ignoring variable access flags (???)
    Tcl_Var *varPtr)
{
    int result;
    Tcl_ResolvedVarInfo *rPtr = NULL;

    result = ProcedureMethodCompiledVarResolver(interp, varName,
	    strlen(varName), contextNs, &rPtr);

    OOResVarInfo *infoPtr = (OOResVarInfo *) rPtr;
    Interp *iPtr = (Interp *) interp;
    CallFrame *framePtr = iPtr->varFramePtr;
    CallContext *contextPtr;
    Tcl_Obj *variableObj;
    PrivateVariableMapping *privateVar;
    Tcl_HashEntry *hPtr;
    int isNew, cacheIt;
    Tcl_Size i, varLen, len;
    const char *match, *varName;

    /*
     * Check that the variable is being requested in a context that is also a
     * method call; if not (i.e. we're evaluating in the object's namespace or
     * in a procedure of that namespace) then we do nothing.
     */

    /*
     * It is a variable we want to resolve, so resolve it.
     */

  gotMatch:
    hPtr = Tcl_CreateHashEntry(TclVarTable(contextPtr->oPtr->namespacePtr),
	    (char *)variableObj, &isNew);
    if (isNew) {
	TclSetVarNamespaceVar((Var *) TclVarHashGetValue(hPtr));
    }
    if (cacheIt) {
	infoPtr->cachedObjectVar = TclVarHashGetValue(hPtr);

	/*

    ckfree(infoPtr);
}

static int
ProcedureMethodCompiledVarResolver(
    TCL_UNUSED(Tcl_Interp *),
    const char *varName,
    Tcl_Size length,
    TCL_UNUSED(Tcl_Namespace *),
    Tcl_ResolvedVarInfo **rPtrPtr)
{
    OOResVarInfo *infoPtr;
    Tcl_Obj *variableObj = Tcl_NewStringObj(varName, length);

    /*

 *	and ELLIPSIFY is a macro to do the conversion (with the help of a
 *	%.*s%s format field). Note that ELLIPSIFY is only safe for use in
 *	suitable formatting contexts.
 *
 * ----------------------------------------------------------------------
 */

// TODO: Check whether Tcl_AppendLimitedToObj() can work here.

#define LIMIT 60
#define ELLIPSIFY(str,len) \
	((len) > LIMIT ? LIMIT : (len)), (str), ((len) > LIMIT ? "..." : "")

static void
MethodErrorHandler(
    Tcl_Interp *interp,
    TCL_UNUSED(Tcl_Obj *) /*methodNameObj*/)
	// We pull the method name out of context instead of from argument
{
    Tcl_Size nameLen, objectNameLen;
    CallContext *contextPtr = (CallContext *)((Interp *) interp)->varFramePtr->clientData;
    Method *mPtr = contextPtr->callPtr->chain[contextPtr->index].mPtr;
    const char *objectName, *kindName, *methodName =
	    TclGetStringFromObj(mPtr->namePtr, &nameLen);
    Object *declarerPtr;

    if (mPtr->declaringObjectPtr != NULL) {

	    ELLIPSIFY(methodName, nameLen), Tcl_GetErrorLine(interp)));
}

static void
ConstructorErrorHandler(
    Tcl_Interp *interp,
    TCL_UNUSED(Tcl_Obj *) /*methodNameObj*/)
	// Ignore. We know it is the constructor.
{
    CallContext *contextPtr = (CallContext *)((Interp *) interp)->varFramePtr->clientData;
    Method *mPtr = contextPtr->callPtr->chain[contextPtr->index].mPtr;
    Object *declarerPtr;
    const char *objectName, *kindName;
    Tcl_Size objectNameLen;

    if (mPtr->declaringObjectPtr != NULL) {
	declarerPtr = mPtr->declaringObjectPtr;
	kindName = "object";
    } else {
	if (mPtr->declaringClassPtr == NULL) {
	    Tcl_Panic("method not declared in class or object");

	    ELLIPSIFY(objectName, objectNameLen), Tcl_GetErrorLine(interp)));
}

static void
DestructorErrorHandler(
    Tcl_Interp *interp,
    TCL_UNUSED(Tcl_Obj *) /*methodNameObj*/)
	// Ignore. We know it is the destructor.
{
    CallContext *contextPtr = (CallContext *)((Interp *) interp)->varFramePtr->clientData;
    Method *mPtr = contextPtr->callPtr->chain[contextPtr->index].mPtr;
    Object *declarerPtr;
    const char *objectName, *kindName;
    Tcl_Size objectNameLen;

    if (mPtr->declaringObjectPtr != NULL) {
	declarerPtr = mPtr->declaringObjectPtr;
	kindName = "object";
    } else {
	if (mPtr->declaringClassPtr == NULL) {
	    Tcl_Panic("method not declared in class or object");

    for (localPtr=pmPtr->procPtr->firstLocalPtr; localPtr!=NULL;
	    localPtr=localPtr->nextPtr) {
	if (TclIsVarArgument(localPtr)) {
	    Tcl_Obj *argObj;

	    TclNewObj(argObj);
	    Tcl_ListObjAppendElement(NULL, argObj,
		    Tcl_NewStringObj(localPtr->name, TCL_AUTO_LENGTH));
	    if (localPtr->defValuePtr != NULL) {
		Tcl_ListObjAppendElement(NULL, argObj, localPtr->defValuePtr);
	    }
	    Tcl_ListObjAppendElement(NULL, argsObj, argObj);
	}
    }

    Tcl_Interp *interp,		/* Interpreter for error reporting. */
    Object *oPtr,		/* The object to attach the method to. */
    int flags,			/* Whether the method is public or not. */
    Tcl_Obj *nameObj,		/* The name of the method. */
    Tcl_Obj *prefixObj)		/* List of arguments that form the command
				 * prefix to forward to. */
{
    Tcl_Size prefixLen;
    ForwardMethod *fmPtr;

    if (TclListObjLength(interp, prefixObj, &prefixLen) != TCL_OK) {
	return NULL;
    }
    if (prefixLen < 1) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj(
		"method forward prefix must be non-empty", TCL_AUTO_LENGTH));
	Tcl_SetErrorCode(interp, "TCL", "OO", "BAD_FORWARD", (char *)NULL);
	return NULL;
    }

    fmPtr = (ForwardMethod *)ckalloc(sizeof(ForwardMethod));
    fmPtr->prefixObj = prefixObj;
    Tcl_IncrRefCount(prefixObj);
    return (Method *)Tcl_NewInstanceMethod(interp, (Tcl_Object) oPtr,
	    nameObj, flags, &fwdMethodType, fmPtr);
}

/*
 * ----------------------------------------------------------------------
 *
 * TclOONewForwardMethod --

    Tcl_Interp *interp,		/* Interpreter for error reporting. */
    Class *clsPtr,		/* The class to attach the method to. */
    int flags,			/* Whether the method is public or not. */
    Tcl_Obj *nameObj,		/* The name of the method. */
    Tcl_Obj *prefixObj)		/* List of arguments that form the command
				 * prefix to forward to. */
{
    Tcl_Size prefixLen;
    ForwardMethod *fmPtr;

    if (TclListObjLength(interp, prefixObj, &prefixLen) != TCL_OK) {
	return NULL;
    }
    if (prefixLen < 1) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj(
		"method forward prefix must be non-empty", TCL_AUTO_LENGTH));
	Tcl_SetErrorCode(interp, "TCL", "OO", "BAD_FORWARD", (char *)NULL);
	return NULL;
    }

    fmPtr = (ForwardMethod *)ckalloc(sizeof(ForwardMethod));
    fmPtr->prefixObj = prefixObj;
    Tcl_IncrRefCount(prefixObj);
    return (Method *)Tcl_NewMethod(interp, (Tcl_Class) clsPtr, nameObj,
	    flags, &fwdMethodType, fmPtr);
}

/*
 * ----------------------------------------------------------------------
 *
 * InvokeForwardMethod --
 *
 *	How to invoke a forwarded method. Works by doing some ensemble-like
 *	command rearranging and then invokes some other Tcl command.
 *
 * ----------------------------------------------------------------------
 */

static int
InvokeForwardMethod(
    void *clientData,		/* Pointer to some per-method context. */
    Tcl_Interp *interp,
    Tcl_ObjectContext context,	/* The method calling context. */
    int objc,			/* Number of arguments. */
    Tcl_Obj *const *objv)	/* Arguments as actually seen. */
{
    CallContext *contextPtr = (CallContext *) context;
    ForwardMethod *fmPtr = (ForwardMethod *)clientData;
    Tcl_Obj **argObjs, **prefixObjs;
    Tcl_Size numPrefixes, skip = contextPtr->skip;
    int len;

    /*
     * Build the real list of arguments to use. Note that we know that the
     * prefixObj field of the ForwardMethod structure holds a reference to a
     * non-empty list, so there's a whole class of failures ("not a list") we
     * can ignore here.
     */

    TclListObjGetElements(NULL, fmPtr->prefixObj, &numPrefixes, &prefixObjs);
    argObjs = InitEnsembleRewrite(interp, objc, objv, skip,
	    numPrefixes, prefixObjs, &len);
    Tcl_NRAddCallback(interp, FinalizeForwardCall, argObjs, NULL, NULL, NULL);
    /*
     * NOTE: The combination of direct set of iPtr->lookupNsPtr and the use
     * of the TCL_EVAL_NOERR flag results in an evaluation configuration
     * very much like TCL_EVAL_INVOKE.
     */
    ((Interp *)interp)->lookupNsPtr = (Namespace *)
	    contextPtr->oPtr->namespacePtr;
    return TclNREvalObjv(interp, len, argObjs, TCL_EVAL_NOERR, NULL);
}

static int
FinalizeForwardCall(
    void *data[],
    Tcl_Interp *interp,