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Error details

Started by The C modest god Sep 24, 2005 at 1:37 AM 2 replies 650+ views

Original Post

Sep 24, 2005 at 1:37 AM

I have seen in here the error message box. The message box says the method, line of code and file in which the error occured. How do you achieve that? Thanks in advance.

Ximmer

Sep 24, 2005 at 2:01 AM

#define Error(message) debug_error(message, __FILE__, __LINE__)void debug_error(const char * errmsg, const char * file, int line){// Print Error Message here}

The C modest god

Sep 24, 2005 at 2:13 AM

Is there no way to tell in which line and file a function is being called from within that method?
So I could get this information in one place and wont have to call __FILE__ and __LINE__ as paramters to my error method?
How did he print in which method the error occured?

JohnBolton

Sep 24, 2005 at 3:27 AM

On some compilers there is also a __FUNCTION__ symbol that is the name of the function where it is used. So expanding on what Ximmer wrote:

    #define Error(message) debug_error(message, __FILE__, __LINE__, __FUNCTION__)    void debug_error(const char * errmsg, const char * file, int line, const char * function)    {        printf( "Error in function '%s' at line %d in '%s': %s\n",                function, line, file, errmsg };    }    void foo()    {        ...        if ( x < 0 )        {            Error( "x is less than zero" );        }        ...

That code might print a line something like this:

Error in function 'foo' at line 345 in 'bar.c': x is less than zero

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