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Jack Crenshaw
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 Posted: Mon Jan 12, 2004 4:25 pm Post subject: Help with asserts in console app |
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Does anyone have a suggestion for how to use asserts in a console app. Running inside the IDE, the window closes as soon as the assertion fails. Therefore I don't get to see which assertion failed. Microsoft puts up a separate dialog box showing the assertion.
Seems to me, one can't use asserts at all, the way things stand.
Jack
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Jack Crenshaw
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| Posted: Mon Jan 12, 2004 6:42 pm Post subject: Re: Help with asserts in console app |
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Thanks, Bruce. I'll try it.
re the column: Stay tuned for results of this effort <grin>.
Jack
" Bruce Salzman" <bruce (AT) nospam (DOT) org> wrote:
| Quote: | Does anyone have a suggestion for how to use asserts in a console app.
Running inside the IDE, the window closes as soon as the assertion fails.
Therefore I don't get to see which assertion failed. Microsoft puts up a
separate dialog box showing the assertion.
Seems to me, one can't use asserts at all, the way things stand.
Hi, Jack
You could try installing a signal "Catcher" routine to handle the abort
call in assert. See the following demo:
#include <assert.h
#include
#include
#include
#ifdef __cplusplus
typedef void (*fptr)(int);
#else
typedef void (*fptr)();
#endif
void Catcher(int *reglist)
{
signal(SIGABRT, (fptr)Catcher); // install signal handler
while (!kbhit()); // wait for key
}
int main(int argc, char* argv[])
{
signal(SIGABRT, (fptr)Catcher); /* cast Catcher to appropriate type */
assert(argc > 2);
printf("Hello, World!n");
return 0;
}
At least the window stays open until you hit a key...
Regards,
Bruce
PS. Looking forward your next Embedded Systems column!
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Bruce Salzman
Guest
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| Posted: Mon Jan 12, 2004 7:37 pm Post subject: Re: Help with asserts in console app |
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| Quote: | Does anyone have a suggestion for how to use asserts in a console app.
Running inside the IDE, the window closes as soon as the assertion fails. |
Therefore I don't get to see which assertion failed. Microsoft puts up a
separate dialog box showing the assertion.
| Quote: |
Seems to me, one can't use asserts at all, the way things stand.
|
Hi, Jack
You could try installing a signal "Catcher" routine to handle the abort
call in assert. See the following demo:
#include <assert.h>
#include <signal.h>
#include <stdio>
#include <conio>
#ifdef __cplusplus
typedef void (*fptr)(int);
#else
typedef void (*fptr)();
#endif
void Catcher(int *reglist)
{
signal(SIGABRT, (fptr)Catcher); // install signal handler
while (!kbhit()); // wait for key
}
int main(int argc, char* argv[])
{
signal(SIGABRT, (fptr)Catcher); /* cast Catcher to appropriate type */
assert(argc > 2);
printf("Hello, World!n");
return 0;
}
At least the window stays open until you hit a key...
Regards,
Bruce
PS. Looking forward your next Embedded Systems column!
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Bruce Salzman
Guest
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| Posted: Mon Jan 12, 2004 7:57 pm Post subject: Re: Help with asserts in console app |
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Oops!
void Catcher(int *reglist)
{
signal(SIGABRT, (fptr)Catcher); // install signal handler
while (!kbhit()); // wait for key
}
should be just
void Catcher(int *reglist)
{
while (!kbhit()); // wait for key
}
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