[Guy Harris <guy@xxxxxxxxxxxx>]

On Dec 19, 2003, at 1:34 PM, Biot Olivier wrote:

> BTW what do CLEANUP_PUSH(g_free, strval) and CLEANUP_CALL_AND_POP do?

The first of those pushes onto a stack of "cleanup" routines an entry 
that says "if an exception is thrown, call 'g_free()' with 'strval' as 
an argument".  The second of those pops that entry off the stack and 
makes the call in question.

I.e., the first one arranges that, even if the second 
"get_text_string()" call throws an exception because the string runs 
past the end of the tvbuff, "strval" will be freed.  The second one 
cleans the entry for that off the stack, and frees "strval".