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int
TclGetFrame(
Tcl_Interp *interp, /* Interpreter in which to find frame. */
const char *name, /* String describing frame. */
CallFrame **framePtrPtr) /* Store pointer to frame here (or NULL if
* global frame indicated). */
{
register Interp *iPtr = (Interp *) interp;
int curLevel, level, result;
CallFrame *framePtr;
/*
* Parse string to figure out which level number to go to.
*/
result = 1;
curLevel = iPtr->varFramePtr->level;
if (*name== '#') {
if (Tcl_GetInt(interp, name+1, &level) != TCL_OK || level < 0) {
goto levelError;
}
} else if (isdigit(UCHAR(*name))) { /* INTL: digit */
if (Tcl_GetInt(interp, name, &level) != TCL_OK) {
goto levelError;
}
level = curLevel - level;
} else {
level = curLevel - 1;
result = 0;
}
/*
* Figure out which frame to use, and return it to the caller.
*/
for (framePtr = iPtr->varFramePtr; framePtr != NULL;
framePtr = framePtr->callerVarPtr) {
if (framePtr->level == level) {
break;
}
}
if (framePtr == NULL) {
goto levelError;
}
*framePtrPtr = framePtr;
return result;
levelError:
Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad level \"%s\"", name));
Tcl_SetErrorCode(interp, "TCL", "VALUE", "STACKLEVEL", NULL);
return -1;
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int
TclGetFrame(
Tcl_Interp *interp, /* Interpreter in which to find frame. */
const char *name, /* String describing frame. */
CallFrame **framePtrPtr) /* Store pointer to frame here (or NULL if
* global frame indicated). */
{
int result;
Tcl_Obj obj;
obj.bytes = (char *) name;
obj.length = strlen(name);
obj.typePtr = NULL;
result = TclObjGetFrame(interp, &obj, framePtrPtr);
TclFreeIntRep(&obj);
return result;
}
/*
*----------------------------------------------------------------------
*
* TclObjGetFrame --
*
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Tcl_Obj *objPtr, /* Object describing frame. */
CallFrame **framePtrPtr) /* Store pointer to frame here (or NULL if
* global frame indicated). */
{
register Interp *iPtr = (Interp *) interp;
int curLevel, level, result;
const char *name = NULL;
/*
* Parse object to figure out which level number to go to.
*/
result = 0;
curLevel = iPtr->varFramePtr->level;
/*
* Check for integer first, since that has potential to spare us
* a generation of a stringrep.
*/
if (objPtr == NULL) {
/* Do nothing */
} else if (TCL_OK == Tcl_GetIntFromObj(NULL, objPtr, &level)
&& (level >= 0)) {
level = curLevel - level;
result = 1;
} else if (objPtr->typePtr == &levelReferenceType) {
level = (int) objPtr->internalRep.wideValue;
result = 1;
} else {
name = TclGetString(objPtr);
if (name[0] == '#') {
if (TCL_OK == Tcl_GetInt(NULL, name+1, &level) && level >= 0) {
TclFreeIntRep(objPtr);
objPtr->typePtr = &levelReferenceType;
objPtr->internalRep.wideValue = level;
result = 1;
} else {
result = -1;
}
} else if (isdigit(UCHAR(name[0]))) { /* INTL: digit */
/*
* If this were an integer, we'd have succeeded already.
* Docs say we have to treat this as a 'bad level' error.
*/
result = -1;
}
}
if (result == 0) {
level = curLevel - 1;
name = "1";
if (name == NULL) {
name = TclGetString(objPtr);
}
}
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Tcl_Obj *objPtr, /* Object describing frame. */
CallFrame **framePtrPtr) /* Store pointer to frame here (or NULL if
* global frame indicated). */
{
register Interp *iPtr = (Interp *) interp;
int curLevel, level, result;
const char *name = NULL;
Tcl_WideInt w;
/*
* Parse object to figure out which level number to go to.
*/
result = 0;
curLevel = iPtr->varFramePtr->level;
/*
* Check for integer first, since that has potential to spare us
* a generation of a stringrep.
*/
if (objPtr == NULL) {
/* Do nothing */
} else if (TCL_OK == Tcl_GetIntFromObj(NULL, objPtr, &level)) {
Tcl_GetWideIntFromObj(NULL, objPtr, &w);
if (w < 0 || w > INT_MAX || curLevel > w + INT_MAX) {
result = -1;
} else {
level = curLevel - level;
result = 1;
}
} else if (objPtr->typePtr == &levelReferenceType) {
level = (int) objPtr->internalRep.wideValue;
result = 1;
} else {
name = TclGetString(objPtr);
if (name[0] == '#') {
if (TCL_OK == Tcl_GetInt(NULL, name+1, &level)) {
if (level < 0 || (level > 0 && name[1] == '-')) {
result = -1;
} else {
TclFreeIntRep(objPtr);
objPtr->typePtr = &levelReferenceType;
objPtr->internalRep.wideValue = level;
result = 1;
}
} else {
result = -1;
}
} else if (TclGetWideBitsFromObj(interp, objPtr, &w) == TCL_OK) {
/*
* If this were an integer, we'd have succeeded already.
* Docs say we have to treat this as a 'bad level' error.
*/
result = -1;
}
}
if (result == 0) {
level = curLevel - 1;
}
if (result != -1) {
if (level >= 0) {
CallFrame *framePtr;
for (framePtr = iPtr->varFramePtr; framePtr != NULL;
framePtr = framePtr->callerVarPtr) {
if (framePtr->level == level) {
*framePtrPtr = framePtr;
return result;
}
}
}
}
if (name == NULL) {
name = TclGetString(objPtr);
}
Tcl_SetObjResult(interp, Tcl_ObjPrintf("bad level \"%s\"", name));
Tcl_SetErrorCode(interp, "TCL", "LOOKUP", "LEVEL", name, NULL);
return -1;
}
/*
*----------------------------------------------------------------------
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