See the file man.macros.
Itcl_InitStack, Itcl_DeleteStack, Itcl_PushStack, Itcl_PopStack, Itcl_PeekStack,
Itcl_GetStackValue, Itcl_GetStackSize - Manipulate an Itcl stack object.
#include <itcl.h>
int
Itcl_InitStack(stack)
int
Itcl_DeleteStack(stack)
int
Itcl_PushStack(cdata, stack)
ClientData
Itcl_PopStack(stack)
ClientData
Itcl_PeekStack(stack)
ClientData
Itcl_GetStackValue(stack, pos)
int
Itcl_GetStackSize(stack)
Stack info structure. position in stack order from the top. Arbitrary one-word
value to save in the stack.
Itcl_InitStack initializes a stack structure and Itcl_DeleteStack
deletes it. Itcl_PushStack pushes the cdata value onto the
stack. Itcl_PopStack removes and returns the top most cdata
value. Itcl_PeekStack returns the top most value, but does not remove
it. Itcl_GetStackValue gets a value at some index within the stack.
Index "0" is the first value pushed onto the stack.
Itcl_GetStackSize returns the count of entries on the stack.