cpp/openttd-patchpack/source Files · src/core/endian_func.hpp

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r24498:e9114d9ab04a 1.8 KiB text/x-c++hdr Show Annotation Show as Raw Download as Raw

Patric Stout

Fix #6468: don't store version of AIs-started-via-console in name

You can do: "startai myai.3", which starts version 3 of "myai".
This is very useful for testing save/load code between different
versions of your AI.

However, when using this syntax, the AI got saved as "myai.3" as
name of the AI, instead of "myai". This caused several problems,
like indicating to the user the AI could not be found, but still
load the AI. But in all cases, the AI never got the chance to
load the saved data, making the whole reason this exists pointless.

By splitting the name and version already in the console command,
the code becomes simpler and AIs started this way now follow the
normal flow after initialization.

/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */

/** @file endian_func.hpp Function to handling different endian machines. */

#ifndef ENDIAN_FUNC_HPP
#define ENDIAN_FUNC_HPP

#include "endian_type.hpp"
#include "bitmath_func.hpp"

/* Setup alignment and conversion macros */
#if TTD_ENDIAN == TTD_BIG_ENDIAN
#	define FROM_BE16(x) (x)
#	define FROM_BE32(x) (x)
#	define TO_BE16(x)   (x)
#	define TO_BE32(x)   (x)
#	define TO_BE32X(x)  (x)
#	define FROM_LE16(x) BSWAP16(x)
#	define FROM_LE32(x) BSWAP32(x)
#	define TO_LE16(x)   BSWAP16(x)
#	define TO_LE32(x)   BSWAP32(x)
#	define TO_LE32X(x)  BSWAP32(x)
#else
#	define FROM_BE16(x) BSWAP16(x)
#	define FROM_BE32(x) BSWAP32(x)
#	define TO_BE16(x)   BSWAP16(x)
#	define TO_BE32(x)   BSWAP32(x)
#	define TO_BE32X(x)  BSWAP32(x)
#	define FROM_LE16(x) (x)
#	define FROM_LE32(x) (x)
#	define TO_LE16(x)   (x)
#	define TO_LE32(x)   (x)
#	define TO_LE32X(x)  (x)
#endif /* TTD_ENDIAN == TTD_BIG_ENDIAN */

static inline uint16 ReadLE16Aligned(const void *x)
{
	return FROM_LE16(*(const uint16*)x);
}

static inline uint16 ReadLE16Unaligned(const void *x)
{
#if OTTD_ALIGNMENT == 1
	return ((const byte*)x)[0] | ((const byte*)x)[1] << 8;
#else
	return FROM_LE16(*(const uint16*)x);
#endif /* OTTD_ALIGNMENT == 1 */
}

#endif /* ENDIAN_FUNC_HPP */