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UNIX for Dummies Questions & Answers
I save the result in a variable
Post 302916219 by Makarand Dodmis on Monday 8th of September 2014 09:12:01 AM
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LEARN ABOUT OPENDARWIN
tcl_restoreresult
Tcl_SaveResult(3) Tcl Library Procedures Tcl_SaveResult(3) __________________________________________________________________________________________________________________________________________________ NAME
Tcl_SaveResult, Tcl_RestoreResult, Tcl_DiscardResult - save and restore an interpreter's result SYNOPSIS
#include <tcl.h> Tcl_SaveResult(interp, statePtr) Tcl_RestoreResult(interp, statePtr) Tcl_DiscardResult(statePtr) ARGUMENTS
Tcl_Interp *interp (in) Interpreter for which state should be saved. Tcl_SavedResult *statePtr (in) Pointer to location where interpreter result should be saved or restored. _________________________________________________________________ DESCRIPTION
These routines allows a C procedure to take a snapshot of the current interpreter result so that it can be restored after a call to Tcl_Eval or some other routine that modifies the interpreter result. These routines are passed a pointer to a structure that is used to store enough information to restore the interpreter result state. This structure can be allocated on the stack of the calling procedure. These routines do not save the state of any error information in the interpreter (e.g. the errorCode or errorInfo variables). Tcl_SaveResult moves the string and object results of interp into the location specified by statePtr. Tcl_SaveResult clears the result for interp and leaves the result in its normal empty initialized state. Tcl_RestoreResult moves the string and object results from statePtr back into interp. Any result or error that was already in the inter- preter will be cleared. The statePtr is left in an uninitialized state and cannot be used until another call to Tcl_SaveResult. Tcl_DiscardResult releases the saved interpreter state stored at statePtr. The state structure is left in an uninitialized state and can- not be used until another call to Tcl_SaveResult. Once Tcl_SaveResult is called to save the interpreter result, either Tcl_RestoreResult or Tcl_DiscardResult must be called to properly clean up the memory associated with the saved state. KEYWORDS
result, state, interp Tcl 8.1 Tcl_SaveResult(3)