wireshark

pcapng: clean up padding-to-4-bytes code. Add a new wsutil header with macros that compute the amount of padding needed to round up to a 4-byte boundary (without any conditional tests) - it ends up being a negate and an AND. Use that in pcapng code. (Next step: use it everywhere else.) Have an inline function that takes a number of bytes of padding to write, between 0 and 3, and writes out that many bytes worth of zeroes. Use it. 2025-05-31 13:27:55 -07:00			`/** @file`
			`*`
			`* Wireshark - Network traffic analyzer`
			`* By Gerald Combs <gerald@wireshark.org>`
			`* Copyright 1998 Gerald Combs`
			`*`
			`* SPDX-License-Identifier: GPL-2.0-or-later`
			`*/`

			`#ifndef __WS_PADDING_TO_H__`
			`#define __WS_PADDING_TO_H__`

			`/*`
			`* Amount needed to pad to various powers of 2.`
			`*/`
			`#define WS_PADDING_TO_2(n) ((2U - ((n) % 2U)) % 2U)`
			`#define WS_PADDING_TO_4(n) ((4U - ((n) % 4U)) % 4U)`
			`#define WS_PADDING_TO_8(n) ((8U - ((n) % 8U)) % 8U)`
			`#define WS_PADDING_TO_16(n) ((16U - ((n) % 16U)) % 16U)`
			`#define WS_PADDING_TO_32(n) ((32U - ((n) % 32U)) % 32U)`

			`#endif /* __WS_PADDING_TO_H__ */`