Make the models for Y and three-way turnouts - advtrains.git

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author	Blockhead <jbis1337@hotmail.com>	2020-08-19 22:22:26 +1000
committer	Blockhead <jbis1337@hotmail.com>	2020-09-11 04:24:36 +1000
commit	7879a0a215547b0e40f5c1469b72547e7633aca7 (patch)
tree	c55b6951f065ce692553c7c70082834b4b4fe8d4 /advtrains_train_industrial/textures/advtrains_engine_industrial_big.png
parent	606fc83465d8742550e9f70a13b51bbb9cd6f45e (diff)
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Make the models for Y and three-way turnouts

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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include "inventory.h"
#include "serialization.h"
#include "debug.h"
#include <sstream>
#include "log.h"
#include "itemdef.h"
#include "strfnd.h"
#include "content_mapnode.h" // For loading legacy MaterialItems
#include "nameidmapping.h" // For loading legacy MaterialItems
#include "util/serialize.h"
#include "util/string.h"

/*
	ItemStack
*/

static content_t content_translate_from_19_to_internal(content_t c_from)
{
	for(u32 i=0; i<sizeof(trans_table_19)/sizeof(trans_table_19[0]); i++)
	{
		if(trans_table_19[i][1] == c_from)
		{
			return trans_table_19[i][0];
		}
	}
	return c_from;
}

// If the string contains spaces, quotes or control characters, encodes as JSON.
// Else returns the string unmodified.
static std::string serializeJsonStringIfNeeded(const std::string &s)
{
	for(size_t i = 0; i < s.size(); ++i)
	{
		if(s[i] <= 0x1f || s[i] >= 0x7f || s[i] == ' ' || s[i] == '\"')
			return serializeJsonString(s);
	}
	return s;
}

// Parses a string serialized by serializeJsonStringIfNeeded.
static std::string deSerializeJsonStringIfNeeded(std::istream &is)
{
	std::ostringstream tmp_os;
	bool expect_initial_quote = true;
	bool is_json = false;
	bool was_backslash = false;
	for(;;)
	{
		char c = is.get();
		if(is.eof())
			break;
		if(expect_initial_quote && c == '"')
		{
			tmp_os << c;
			is_json = true;
		}
		else if(is_json)
		{
			tmp_os << c;
			if(was_backslash)
				was_backslash = false;
			else if(c == '\\')
				was_backslash = true;
			else if(c == '"')
				break; // Found end of string
		}
		else
		{
			if(c == ' ')
			{
				// Found end of word
				is.unget();
				break;
			}
			else
			{
				tmp_os << c;
			}
		}
		expect_initial_quote = false;
	}
	if(is_json)
	{
		std::istringstream tmp_is(tmp_os.str(), std::ios::binary);
		return deSerializeJsonString(tmp_is);
	}
	else
		return tmp_os.str();
}


ItemStack::ItemStack(std::string name_, u16 count_,
		u16 wear_, std::string metadata_,
		IItemDefManager *itemdef)
{
	name = itemdef->getAlias(name_);
	count = count_;
	wear = wear_;
	metadata = metadata_;

	if(name.empty() || count == 0)
		clear();
	else if(itemdef->get(name).type == ITEM_TOOL)
		count = 1;
}

void ItemStack::serialize(std::ostream &os) const
{
	DSTACK(__FUNCTION_NAME);

	if(empty())
		return;

	// Check how many parts of the itemstring are needed
	int parts = 1;
	if(count != 1)
		parts = 2;
	if(wear != 0)
		parts = 3;
	if(metadata != "")
		parts = 4;

	os<<serializeJsonStringIfNeeded(name);
	if(parts >= 2)
		os<<" "<<count;
	if(parts >= 3)
		os<<" "<<wear;
	if(parts >= 4)
		os<<" "<<serializeJsonStringIfNeeded(metadata);
}

void ItemStack::deSerialize(std::istream &is, IItemDefManager *itemdef)
{
	DSTACK(__FUNCTION_NAME);

	clear();

	// Read name
	name = deSerializeJsonStringIfNeeded(is);

	// Skip space
	std::string tmp;
	std::getline(is, tmp, ' ');
	if(!tmp.empty())
		throw SerializationError("Unexpected text after item name");
	
	if(name == "MaterialItem")
	{
		// Obsoleted on 2011-07-30

		u16 material;
		is>>material;
		u16 materialcount;
		is>>materialcount;
		// Convert old materials
		if(material <= 0xff)
			material = content_translate_from_19_to_internal(material);
		if(material > MAX_CONTENT)
			throw SerializationError("Too large material number");
		// Convert old id to name
		NameIdMapping legacy_nimap;
		content_mapnode_get_name_id_mapping(&legacy_nimap);
		legacy_nimap.getName(material, name);
		if(name == "")
			name = "unknown_block";
		name = itemdef->getAlias(name);
		count = materialcount;
	}
	else if(name == "MaterialItem2")
	{
		// Obsoleted on 2011-11-16

		u16 material;
		is>>material;
		u16 materialcount;
		is>>materialcount;
		if(material > MAX_CONTENT)
			throw SerializationError("Too large material number");
		// Convert old id to name
		NameIdMapping legacy_nimap;
		content_mapnode_get_name_id_mapping(&legacy_nimap);
		legacy_nimap.getName(material, name);
		if(name == "")
			name = "unknown_block";
		name = itemdef->getAlias(name);
		count = materialcount;
	}
	else if(name == "node" || name == "NodeItem" || name == "MaterialItem3"
			|| name == "craft" || name == "CraftItem")
	{
		// Obsoleted on 2012-01-07

		std::string all;
		std::getline(is, all, '\n');
		// First attempt to read inside ""
		Strfnd fnd(all);
		fnd.next("\"");
		// If didn't skip to end, we have ""s
		if(!fnd.atend()){
			name = fnd.next("\"");
		} else { // No luck, just read a word then
			fnd.start(all);
			name = fnd.next(" ");
		}
		fnd.skip_over(" ");
		name = itemdef->getAlias(name);
		count = stoi(trim(fnd.next("")));
		if(count == 0)
			count = 1;
	}
	else if(name == "MBOItem")
	{
		// Obsoleted on 2011-10-14
		throw SerializationError("MBOItem not supported anymore");
	}
	else if(name == "tool" || name == "ToolItem")
	{
		// Obsoleted on 2012-01-07

		std::string all;
		std::getline(is, all, '\n');
		// First attempt to read inside ""
		Strfnd fnd(all);
		fnd.next("\"");
		// If didn't skip to end, we have ""s
		if(!fnd.atend()){
			name = fnd.next("\"");
		} else { // No luck, just read a word then
			fnd.start(all);
			name = fnd.next(" ");
		}
		count = 1;
		// Then read wear
		fnd.skip_over(" ");
		name = itemdef->getAlias(name);
		wear = stoi(trim(fnd.next("")));
	}
	else
	{
		do  // This loop is just to allow "break;"
		{
			// The real thing

			// Apply item aliases
			name = itemdef->getAlias(name);

			// Read the count
			std::string count_str;
			std::getline(is, count_str, ' ');
			if(count_str.empty())
			{
				count = 1;
				break;
			}
			else
				count = stoi(count_str);

			// Read the wear
			std::string wear_str;
			std::getline(is, wear_str, ' ');
			if(wear_str.empty())
				break;
			else
				wear = stoi(wear_str);

			// Read metadata
			metadata = deSerializeJsonStringIfNeeded(is);

			// In case fields are added after metadata, skip space here:
			//std::getline(is, tmp, ' ');
			//if(!tmp.empty())
			//	throw SerializationError("Unexpected text after metadata");

		} while(false);
	}

	if(name.empty() || count == 0)
		clear();
	else if(itemdef->get(name).type == ITEM_TOOL)
		count = 1;
}

void ItemStack::deSerialize(const std::string &str, IItemDefManager *itemdef)
{
	std::istringstream is(str, std::ios::binary);
	deSerialize(is, itemdef);
}

std::string ItemStack::getItemString() const
{
	// Get item string
	std::ostringstream os(std::ios::binary);
	serialize(os);
	return os.str();
}

ItemStack ItemStack::addItem(const ItemStack &newitem_,
		IItemDefManager *itemdef)
{
	ItemStack newitem = newitem_;

	// If the item is empty or the position invalid, bail out
	if(newitem.empty())
	{
		// nothing can be added trivially
	}
	// If this is an empty item, it's an easy job.
	else if(empty())
	{
		*this = newitem;
		newitem.clear();
	}
	// If item name differs, bail out
	else if(name != newitem.name)
	{
		// cannot be added
	}
	// If the item fits fully, add counter and delete it
	else if(newitem.count <= freeSpace(itemdef))
	{
		add(newitem.count);
		newitem.clear();
	}
	// Else the item does not fit fully. Add all that fits and return
	// the rest.
	else
	{
		u16 freespace = freeSpace(itemdef);
		add(freespace);
		newitem.remove(freespace);
	}

	return newitem;
}

bool ItemStack::itemFits(const ItemStack &newitem_,
		ItemStack *restitem,
		IItemDefManager *itemdef) const
{
	ItemStack newitem = newitem_;

	// If the item is empty or the position invalid, bail out
	if(newitem.empty())
	{
		// nothing can be added trivially
	}
	// If this is an empty item, it's an easy job.
	else if(empty())
	{
		newitem.clear();
	}
	// If item name differs, bail out
	else if(name != newitem.name)
	{
		// cannot be added
	}
	// If the item fits fully, delete it
	else if(newitem.count <= freeSpace(itemdef))
	{
		newitem.clear();
	}
	// Else the item does not fit fully. Return the rest.
	// the rest.
	else
	{
		u16 freespace = freeSpace(itemdef);


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