src/script/lua_api/l_http.h

/*
Minetest
Copyright (C) 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 "database.h"
#include "irrlichttypes.h"


/****************
 * Black magic! *
 ****************
 * The position hashing is very messed up.
 * It's a lot more complicated than it looks.
 */

static inline s16 unsigned_to_signed(u16 i, u16 max_positive)
{
	if (i < max_positive) {
		return i;
	}

	return i - (max_positive * 2);
}


// Modulo of a negative number does not work consistently in C
static inline s64 pythonmodulo(s64 i, s16 mod)
{
	if (i >= 0) {
		return i % mod;
	}
	return mod - ((-i) % mod);
}


s64 MapDatabase::getBlockAsInteger(const v3s16 &pos)
{
	return (u64) pos.Z * 0x1000000 +
		(u64) pos.Y * 0x1000 +
		(u64) pos.X;
}


v3s16 MapDatabase::getIntegerAsBlock(s64 i)
{
	v3s16 pos;
	pos.X = unsigned_to_signed(pythonmodulo(i, 4096), 2048);
	i = (i - pos.X) / 4096;
	pos.Y = unsigned_to_signed(pythonmodulo(i, 4096), 2048);
	i = (i - pos.Y) / 4096;
	pos.Z = unsigned_to_signed(pythonmodulo(i, 4096), 2048);
	return pos;
}
	Commit message (Collapse)	Author	Age
*	Add Lua interface to HTTPFetchRequest	Jeija	2016-02-22
	This allows mods to perform both asynchronous and synchronous HTTP requests. Mods are only granted access to HTTP APIs if either mod security is disabled or if they are whitelisted in any of the the secure.http_mods and secure.trusted_mods settings. Adds httpfetch_caller_alloc_secure to generate random, non-predictable caller IDs so that lua mods cannot spy on each others HTTP queries.