signs.c
author celestar
Fri, 29 Jul 2005 21:36:02 +0000
changeset 2233 146e2e405ec1
parent 2186 461a2aff3486
child 2239 5e1245aad0de
permissions -rw-r--r--
(svn r2753) -Codechange: Introduced a new struct "RailtypeInfo" to store rail type specific information. Begun populating it with a bunch of sprites, more to come later. This should result in cleaner, more compact code which allows easy introduction of new railtypes.
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/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "table/strings.h"
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#include "functions.h"
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#include "player.h"
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#include "signs.h"
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#include "saveload.h"
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#include "command.h"
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#include "strings.h"
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#include "variables.h"
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enum {
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	/* Max signs: 64000 (4 * 16000) */
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	SIGN_POOL_BLOCK_SIZE_BITS = 2,       /* In bits, so (1 << 2) == 4 */
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	SIGN_POOL_MAX_BLOCKS      = 16000,
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};
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/**
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 * Called if a new block is added to the sign-pool
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 */
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static void SignPoolNewBlock(uint start_item)
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{
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	SignStruct *ss;
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	FOR_ALL_SIGNS_FROM(ss, start_item)
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		ss->index = start_item++;
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}
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/* Initialize the sign-pool */
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MemoryPool _sign_pool = { "Signs", SIGN_POOL_MAX_BLOCKS, SIGN_POOL_BLOCK_SIZE_BITS, sizeof(SignStruct), &SignPoolNewBlock, 0, 0, NULL };
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/**
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 *
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 * Update the coordinate of one sign
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 *
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 */
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static void UpdateSignVirtCoords(SignStruct *ss)
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{
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	Point pt = RemapCoords(ss->x, ss->y, ss->z);
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	SetDParam(0, ss->str);
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	UpdateViewportSignPos(&ss->sign, pt.x, pt.y - 6, STR_2806);
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}
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/**
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 *
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 * Update the coordinates of all signs
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 *
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 */
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void UpdateAllSignVirtCoords(void)
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{
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	SignStruct *ss;
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	FOR_ALL_SIGNS(ss)
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		if (ss->str != 0)
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			UpdateSignVirtCoords(ss);
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}
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/**
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 *
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 * Marks the region of a sign as dirty
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 *
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 * @param ss Pointer to the SignStruct
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 */
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static void MarkSignDirty(SignStruct *ss)
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{
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	MarkAllViewportsDirty(
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		ss->sign.left - 6,
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		ss->sign.top  - 3,
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		ss->sign.left + ss->sign.width_1 * 4 + 12,
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		ss->sign.top  + 45);
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}
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/**
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 *
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 * Allocates a new sign
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 *
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 * @return The pointer to the new sign, or NULL if there is no more free space
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 */
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static SignStruct *AllocateSign(void)
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{
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	SignStruct *ss;
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	FOR_ALL_SIGNS(ss) {
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		if (ss->str == 0) {
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			uint index = ss->index;
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			memset(ss, 0, sizeof(SignStruct));
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			ss->index = index;
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			return ss;
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		}
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	}
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	/* Check if we can add a block to the pool */
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	if (AddBlockToPool(&_sign_pool))
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		return AllocateSign();
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	return NULL;
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}
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/** Place a sign at the given coordinates. Ownership of sign has
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 * no effect whatsoever except for the colour the sign gets for easy recognition,
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 * but everybody is able to rename/remove it.
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 * @param x,y coordinates to place sign at
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 * @param p1 unused
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 * @param p2 unused
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 */
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int32 CmdPlaceSign(int x, int y, uint32 flags, uint32 p1, uint32 p2)
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{
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	SignStruct *ss;
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	/* Try to locate a new sign */
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	ss = AllocateSign();
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	if (ss == NULL) return_cmd_error(STR_2808_TOO_MANY_SIGNS);
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	/* When we execute, really make the sign */
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	if (flags & DC_EXEC) {
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		ss->str = STR_280A_SIGN;
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		ss->x = x;
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		ss->y = y;
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		ss->owner = _current_player; // owner of the sign; just eyecandy
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		ss->z = GetSlopeZ(x,y);
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		UpdateSignVirtCoords(ss);
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		MarkSignDirty(ss);
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		InvalidateWindow(WC_SIGN_LIST, 0);
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		_sign_sort_dirty = true;
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		_new_sign_struct = ss;
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	}
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	return 0;
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}
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/** Rename a sign. If the new name of the sign is empty, we assume
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 * the user wanted to delete it. So delete it. Ownership of signs
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 * has no meaning/effect whatsoever except for eyecandy
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 * @param x,y unused
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 * @param p1 index of the sign to be renamed/removed
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 * @param p2 unused
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 */
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int32 CmdRenameSign(int x, int y, uint32 flags, uint32 p1, uint32 p2)
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{
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	if (!IsSignIndex(p1)) return CMD_ERROR;
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	/* If _cmd_text 0 means the new text for the sign is non-empty.
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	 * So rename the sign. If it is empty, it has no name, so delete it */
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	if (_cmd_text[0] != '\0') {
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		/* Create the name */
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		StringID str = AllocateName(_cmd_text, 0);
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		if (str == 0) return CMD_ERROR;
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		if (flags & DC_EXEC) {
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			SignStruct *ss = GetSign(p1);
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			/* Delete the old name */
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			DeleteName(ss->str);
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			/* Assign the new one */
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			ss->str = str;
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			ss->owner = _current_player;
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			/* Update; mark sign dirty twice, because it can either becom longer, or shorter */
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			MarkSignDirty(ss);
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			UpdateSignVirtCoords(ss);
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			MarkSignDirty(ss);
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			InvalidateWindow(WC_SIGN_LIST, 0);
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			_sign_sort_dirty = true;
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		} else {
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			/* Free the name, because we did not assign it yet */
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			DeleteName(str);
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		}
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	} else { /* Delete sign */
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		if (flags & DC_EXEC) {
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			SignStruct *ss = GetSign(p1);
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			/* Delete the name */
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			DeleteName(ss->str);
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			ss->str = 0;
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			MarkSignDirty(ss);
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			InvalidateWindow(WC_SIGN_LIST, 0);
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			_sign_sort_dirty = true;
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		}
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	}
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	return 0;
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}
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/**
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 *
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 * Callback function that is called after a sign is placed
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 *
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 */
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void CcPlaceSign(bool success, TileIndex tile, uint32 p1, uint32 p2)
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{
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	if (success) {
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		ShowRenameSignWindow(_new_sign_struct);
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		ResetObjectToPlace();
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	}
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}
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/**
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 *
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 * PlaceProc function, called when someone pressed the button if the
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 *  sign-tool is selected
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 *
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 */
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void PlaceProc_Sign(TileIndex tile)
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{
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	DoCommandP(tile, _current_player, 0, CcPlaceSign, CMD_PLACE_SIGN | CMD_MSG(STR_2809_CAN_T_PLACE_SIGN_HERE));
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}
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/**
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 *
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 * Initialize the signs
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 *
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 */
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void InitializeSigns(void)
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{
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	CleanPool(&_sign_pool);
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	AddBlockToPool(&_sign_pool);
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}
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023a134a4b12 (svn r2387) - CodeChange: made the saveload code more readable and also removed the 'byte' saveload arrays which means you can save an array of more than 255 elements, or bigger structs than 255 bytes. This doesn't yet solve the problem that a chunk can be a maximum of 16384 big.
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static const SaveLoad _sign_desc[] = {
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	SLE_VAR(SignStruct,str,						SLE_UINT16),
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	SLE_CONDVAR(SignStruct,x,					SLE_FILE_I16 | SLE_VAR_I32, 0, 4),
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	SLE_CONDVAR(SignStruct,y,					SLE_FILE_I16 | SLE_VAR_I32, 0, 4),
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	SLE_CONDVAR(SignStruct,x,					SLE_INT32, 5, 255),
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	SLE_CONDVAR(SignStruct,y,					SLE_INT32, 5, 255),
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	SLE_CONDVAR(SignStruct,owner,			SLE_UINT8, 6, 255),
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	SLE_VAR(SignStruct,z,							SLE_UINT8),
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	SLE_END()
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};
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/**
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 *
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 * Save all signs
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 *
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 */
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static void Save_SIGN(void)
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{
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	SignStruct *ss;
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	FOR_ALL_SIGNS(ss) {
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		/* Don't save empty signs */
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		if (ss->str != 0) {
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			SlSetArrayIndex(ss->index);
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			SlObject(ss, _sign_desc);
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		}
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	}
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}
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/**
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 *
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 * Load all signs
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 *
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 */
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static void Load_SIGN(void)
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{
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	int index;
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	while ((index = SlIterateArray()) != -1) {
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		SignStruct *ss;
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		if (!AddBlockIfNeeded(&_sign_pool, index))
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			error("Signs: failed loading savegame: too many signs");
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		ss = GetSign(index);
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		SlObject(ss, _sign_desc);
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	}
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	_sign_sort_dirty = true;
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}
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const ChunkHandler _sign_chunk_handlers[] = {
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	{ 'SIGN', Save_SIGN, Load_SIGN, CH_ARRAY | CH_LAST},
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};