[DGD]Using DGD_STRING_NEW correctly...

[Michael J. Bacon]

	I think I am doing something "bad" with DGD_STRING_NEW because I'm creating
memory leaks like crazy. :-)

	In an extension I have a loop that is creating a lot of strings and adding
them to a mapping.  To do this I call DGD_STRING_NEW repeatedly. ie...

	while (field != NULL)
		str = DGD_STRING_NEW(field->name, strlen(field->name));
		DGD_STRING_PUTVAL(nameval, str);
		str2 = DGD_STRING_NEW(field->data, strlen(field->data));
		DGD_STRING_PUTVAL(fieldval, str2);
		DGD_MAPPING_ASSIGN(data, map, nameval, fieldval);

	... lots of stuff edited out but this gives you the gist of what creates
the problem I think.   When this function has finished there are a bunch of
leaked strings.

	I tried using str_del() to free the string but under certain conditions it
would cause memory exceptions.  When tracing through in the debugger,
assigning a string to a value with DGD_STRING_PUTVAL seems to increase the
reference counter as does assigning the values to the mapping.

	What is the correct way to use dgd string pointers in extension loops?


Thanks;
Michael.


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