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Wireshark-dev: [Wireshark-dev] g_snprintf() and sizeof

From: Guy Harris <guy@xxxxxxxxxxxx>
Date: Thu, 19 Mar 2009 11:12:03 -0700

On Mar 19, 2009, at 10:44 AM, wmeier@xxxxxxxxxxxxx wrote:

-As suggested by Jakub Zawadzki: use sizeof(...) rather than a numeric constant in various places;

Warning: g_snprintf()'s function signature has an annoying botch in it - the size argument is a gulong, not a gsize.

Not a problem in the UN*X and Windows ILP32 environment and in the UN*X LP64 environment, but it causes the Microsoft compiler to (correctly) warn about a conversion from a 64-bit integer to a 32-bit integer in the Windows LLP64 environment. Cast sizeof - or any other size_t value - to (gulong) before passing it as the length argument to g_snprintf().