66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
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#include "exclib.h"
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#include <stdio.h>
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void nullfunc(int *something)
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{
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THROW_ZERO(something, EXC_NULLPOINTER, NULL);
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printf("nullfunc got %d\n", *something);
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}
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void badfunc(void)
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{
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// This function represents a function that you think you can trust; but there's a null
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// pointer being passed here that you have no control over. Thankfully 'nullfunc' was
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// written to be safe, so it will illustrate the usefulness of TRY/CATCH/ETRY.
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int *ptr = NULL;
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nullfunc(ptr);
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}
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void testfunc(void)
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{
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THROW(34, "Random test exception");
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}
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int main(void)
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{
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int x = 2;
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exclib_register_signals();
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printf("Stack frames are %d bytes in size\n\n", sizeof(struct exc_status));
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TRY {
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fprintf(stdout, "Throwing %d\n", x);
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THROW(2, "First exception");
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} CATCH(-1) {
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printf("Caught -1\n");
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THROW(1, "1 Exception");
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} CATCH(1) {
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printf("Caught 1\n");
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} CATCH(2) {
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printf("Caught 2\n");
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TRY {
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testfunc();
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} CATCH(34) {
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printf("Caught 34!\n");
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printf("Throwing 34 Back Out\n");
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THROW(34, "Second-layer exception 34");
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} ETRY;
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} CATCH(34) {
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printf("Caught 34 in upper level!\n");
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printf("Using THROW_NONZERO\n");
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THROW_NONZERO(strcmp("a", "b"), 0, "String Compare Exception");
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} FINALLY {
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printf("In finally clause.\n");
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exclib_print_exception_stack(__FILE__, (char *)__func__, __LINE__);
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} ETRY;
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TRY {
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badfunc();
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} ETRY;
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/*printf("\nThrowing an exception with no toplevel TRY block, which should stacktrace and kill us...\n\n");
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THROW(34, "Bad Exception");*/
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return 0;
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}
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