Tcl Source Code

void *
TclStackAlloc(
    Tcl_Interp *interp,
    int numBytes)
{
    Interp *iPtr = (Interp *) interp;
    int numWords;

    if (iPtr == NULL || iPtr->execEnvPtr == NULL) {
	return (void *) ckalloc(numBytes);
    }
    numWords = (numBytes + (sizeof(Tcl_Obj *) - 1))/sizeof(Tcl_Obj *);
    return (void *) StackAllocWords(interp, numWords);
}

void *
TclStackRealloc(
    Tcl_Interp *interp,
    void *ptr,

#   define TclUniCharNcmp(cs,ct,n) memcmp((cs),(ct),(n)*sizeof(Tcl_UniChar))
#else /* !WORDS_BIGENDIAN */
#   define TclUniCharNcmp Tcl_UniCharNcmp
#endif /* WORDS_BIGENDIAN */

/*
 *----------------------------------------------------------------
 * Macro used by the Tcl core to increment a namespace's export epoch
 * counter. The ANSI C "prototype" for this macro is:
 *
 * MODULE_SCOPE void	TclInvalidateNsCmdLookup(Namespace *nsPtr);
 *----------------------------------------------------------------
 */

#define TclInvalidateNsCmdLookup(nsPtr) \

    Namespace *nsPtr,		/* Namespace containing this proc. */
    const char *procName,	/* Unqualified name of this proc. */
    Tcl_Obj *argsPtr,		/* Description of arguments. */
    Tcl_Obj *bodyPtr,		/* Command body. */
    Proc **procPtrPtr)		/* Returns: pointer to proc data. */
{
    Interp *iPtr = (Interp *) interp;


    register Proc *procPtr;
    int i, result, numArgs, plen;
    const char *bytes, *argname, *argnamei;
    char argnamelast;
    register CompiledLocal *localPtr = NULL;
    Tcl_Obj *defPtr, *errorObj, **argArray;
    int precompiled = 0;

    if (bodyPtr->typePtr == &tclProcBodyType) {
	/*
	 * Because the body is a TclProProcBody, the actual body is already
	 * compiled, and it is not shared with anyone else, so it's OK not to
	 * unshare it (as a matter of fact, it is bad to unshare it, because

	 * means that the same code can not be shared by two procedures that
	 * have a different number of arguments, even if their bodies are
	 * identical. Note that we don't use Tcl_DuplicateObj since we would
	 * not want any bytecode internal representation.
	 */

	if (Tcl_IsShared(bodyPtr)) {
	    int length;
	    Tcl_Obj *sharedBodyPtr = bodyPtr;

	    bytes = TclGetStringFromObj(bodyPtr, &length);
	    bodyPtr = Tcl_NewStringObj(bytes, length);

	    /*
	     * TIP #280.

    }

    /*
     * Break up the argument list into argument specifiers, then process each
     * argument specifier. If the body is precompiled, processing is limited
     * to checking that the parsed argument is consistent with the one stored
     * in the Proc.


     */


    result = Tcl_ListObjGetElements(interp , argsPtr ,&numArgs ,&argArray);
    if (result != TCL_OK) {
	goto procError;
    }

    if (precompiled) {
	if (numArgs > procPtr->numArgs) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(

	procPtr->numArgs = numArgs;
	procPtr->numCompiledLocals = numArgs;
    }

    for (i = 0; i < numArgs; i++) {
	int fieldCount, nameLength;
	size_t valueLength;
	Tcl_Obj **fieldValues;

	/*
	 * Now divide the specifier up into name and default.
	 */

	result = Tcl_ListObjGetElements(interp, argArray[i], &fieldCount,
		&fieldValues);
	if (result != TCL_OK) {
	    goto procError;
	}
	if (fieldCount > 2) {

	    errorObj = Tcl_NewStringObj(
		"too many fields in argument specifier \"", -1);
	    Tcl_AppendObjToObj(errorObj, argArray[i]);
	    Tcl_AppendToObj(errorObj, "\"", -1);
	    Tcl_SetObjResult(interp, errorObj);
	    Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
		    "FORMALARGUMENTFORMAT", NULL);
	    goto procError;
	}
	if ((fieldCount == 0) || (fieldValues[0]->length == 0)) {

	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "argument with no name", -1));
	    Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
		    "FORMALARGUMENTFORMAT", NULL);
	    goto procError;
	}

	nameLength = Tcl_NumUtfChars(Tcl_GetString(fieldValues[0]), fieldValues[0]->length);
	if (fieldCount == 2) {
	    valueLength = Tcl_NumUtfChars(Tcl_GetString(fieldValues[1]),
		fieldValues[1]->length);
	} else {
	    valueLength = 0;
	}

	/*
	 * Check that the formal parameter name is a scalar.
	 */

	argname = Tcl_GetStringFromObj(fieldValues[0], &plen);
	argnamei = argname;
	argnamelast = argname[plen-1];
	while (plen--) {
	    if (argnamei[0] == '(') {





		if (argnamelast == ')') {	/* We have an array element. */
		    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			    "formal parameter \"%s\" is an array element",
			    Tcl_GetString(fieldValues[0])));

		    Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
			    "FORMALARGUMENTFORMAT", NULL);
		    goto procError;
		}
	    } else if ((argnamei[0] == ':') && (argnamei[1] == ':')) {

		errorObj = Tcl_NewStringObj("formal parameter \"", -1);
		Tcl_AppendObjToObj(errorObj, fieldValues[0]);
		Tcl_AppendToObj(errorObj, "\" is not a simple name", -1);
		Tcl_SetObjResult(interp, errorObj);
		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
			"FORMALARGUMENTFORMAT", NULL);
		goto procError;
	    }

	    argnamei = Tcl_UtfNext(argnamei);
	}

	if (precompiled) {
	    /*
	     * Compare the parsed argument with the stored one. Note that the
	     * only flag value that makes sense at this point is VAR_ARGUMENT
	     * (its value was kept the same as pre VarReform to simplify
	     * tbcload's processing of older byetcodes).
	     *
	     * The only other flag vlaue that is important to retrieve from
	     * precompiled procs is VAR_TEMPORARY (also unchanged). It is
	     * needed later when retrieving the variable names.
	     */

	    if ((localPtr->nameLength != nameLength)
		    || (Tcl_UtfNcmp(localPtr->name, argname, nameLength))
		    || (localPtr->frameIndex != i)
		    || !(localPtr->flags & VAR_ARGUMENT)
		    || (localPtr->defValuePtr == NULL && fieldCount == 2)
		    || (localPtr->defValuePtr != NULL && fieldCount != 2)) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"procedure \"%s\": formal parameter %d is "
			"inconsistent with precompiled body", procName, i));

		Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
			"BYTECODELIES", NULL);
		goto procError;
	    }

	    /*
	     * Compare the default value if any.
	     */

	    if (localPtr->defValuePtr != NULL) {
		const char *tmpPtr = TclGetString(localPtr->defValuePtr);
		size_t tmpLength = localPtr->defValuePtr->length;

		if ((valueLength != tmpLength) ||
			Tcl_UtfNcmp(Tcl_GetString(fieldValues[1]), tmpPtr, tmpLength)) {
		    errorObj = Tcl_ObjPrintf(
			    "procedure \"%s\": formal parameter \"" ,procName);
		    Tcl_AppendObjToObj(errorObj, fieldValues[0]);
		    Tcl_AppendToObj(errorObj, "\" has "
			"default value inconsistent with precompiled body", -1);


		    Tcl_SetObjResult(interp, errorObj);
		    Tcl_SetErrorCode(interp, "TCL", "OPERATION", "PROC",
			    "BYTECODELIES", NULL);
		    goto procError;
		}
	    }
	    if ((i == numArgs - 1)
		    && (localPtr->nameLength == 4)
		    && (localPtr->name[0] == 'a')
		    && (strcmp(localPtr->name, "args") == 0)) {
		localPtr->flags |= VAR_IS_ARGS;
	    }

	    localPtr = localPtr->nextPtr;
	} else {
	    /*
	     * Allocate an entry in the runtime procedure frame's array of
	     * local variables for the argument.
	     */

	    localPtr = ckalloc(TclOffset(CompiledLocal, name) + fieldValues[0]->length +1);
	    if (procPtr->firstLocalPtr == NULL) {
		procPtr->firstLocalPtr = procPtr->lastLocalPtr = localPtr;
	    } else {
		procPtr->lastLocalPtr->nextPtr = localPtr;
		procPtr->lastLocalPtr = localPtr;
	    }
	    localPtr->nextPtr = NULL;
	    localPtr->nameLength = Tcl_NumUtfChars(argname, fieldValues[0]->length);
	    localPtr->frameIndex = i;
	    localPtr->flags = VAR_ARGUMENT;
	    localPtr->resolveInfo = NULL;

	    if (fieldCount == 2) {
		localPtr->defValuePtr = fieldValues[1];

		Tcl_IncrRefCount(localPtr->defValuePtr);
	    } else {
		localPtr->defValuePtr = NULL;
	    }
	    memcpy(localPtr->name, argname, fieldValues[0]->length + 1);
	    if ((i == numArgs - 1)
		    && (localPtr->nameLength == 4)
		    && (localPtr->name[0] == 'a')
		    && (strcmp(localPtr->name, "args") == 0)) {
		localPtr->flags |= VAR_IS_ARGS;
	    }
	}


    }

    *procPtrPtr = procPtr;

    return TCL_OK;

  procError:
    if (precompiled) {
	procPtr->refCount--;
    } else {
	Tcl_DecrRefCount(bodyPtr);
	while (procPtr->firstLocalPtr != NULL) {
	    localPtr = procPtr->firstLocalPtr;
	    procPtr->firstLocalPtr = localPtr->nextPtr;

	    defPtr = localPtr->defValuePtr;
	    if (defPtr != NULL) {
		Tcl_DecrRefCount(defPtr);
	    }

	    ckfree(localPtr);
	}
	ckfree(procPtr);
    }



    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * TclGetFrame --