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986fe9a65b
The only actual behavior change is in Ackermann.cc, which previously reported incorrectly high recursion depths for some calculations.
98 lines
2.9 KiB
C++
98 lines
2.9 KiB
C++
/******************************************************************
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*
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* Error Trap
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*
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* You can trap run-time errors with ORCA/C. There are several
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* reasons to do this, including:
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*
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* 1. Error messages take up space. By replacing the
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* system error handler with your own, you can cut
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* out the space needed to store the run-time error
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* messages.
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* 2. You may want to trap some kinds of run-time
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* errors, like file not found or out of memory,
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* and handle them yourself. If you do not, the
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* error will cause the program to stop executing,
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* which may not be the desired result.
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*
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* This program shows how to intercept and handle run-time
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* errors. This is done by placing a function in your program
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* called SYSTEMERROR. The function has a single parameter,
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* which is an integer error number. SYSTEMERROR replaces a
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* function by the same name that is normally linked in from
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* the libraries. Another library function, SystemErrorLocation,
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* provides the name of the function and the line number where
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* the run-time error occurred.
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*
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* Note that if you do not want to handle a particular error,
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* you can call the system error handlers from your program.
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* See the sample program ERROREXIT.CC for an example.
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*
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* By Mike Westerfield and Barbara Allred
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*
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* Copyright 1987-1989
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* Byte Works, Inc.
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*
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*******************************************************************/
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#pragma keep "ErrorTrap"
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#pragma debug 9 /* enable range checking + trace-back */
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#pragma lint -1
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#include <stdio.h>
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extern pascal void SystemErrorLocation (void);
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/* A library procedure that prints the current location and a traceback. */
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/****************************************************************
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*
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* BadFunction - Subroutine that will generate a run-time error
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*
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****************************************************************/
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static void BadFunction (void)
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{
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char ch [8000]; /* this array is too large for */
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/* the default run-time stack */
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(void)ch; /* dummy use of ch to avoid lint msg */
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}
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/****************************************************************
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*
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* DoIt - Calls function that will generate a run-time error
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*
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****************************************************************/
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static void DoIt (void)
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{
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BadFunction(); /* call function with large array */
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}
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/****************************************************************
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*
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* SystemError - Replaces SYSTEMERROR function in the ORCA library
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*
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****************************************************************/
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static void SYSTEMERROR (int errorNumber)
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{
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printf ("Run-time error detected. error number = %d\n", errorNumber);
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}
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/****************************************************************
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*
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* Main program starts here
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*
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****************************************************************/
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int main(void)
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{
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DoIt();
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SystemErrorLocation();
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}
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