From 1bc37d576ce790c1169c5f9996be7bbc8026db2c Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Sun, 17 Jun 2012 01:29:13 +0300
Subject: Initially split utility.h to multiple files in util/

---
 src/utility.cpp | 434 +-------------------------------------------------------
 1 file changed, 1 insertion(+), 433 deletions(-)

(limited to 'src/utility.cpp')

diff --git a/src/utility.cpp b/src/utility.cpp
index 6b664ea8c..66127fc3b 100644
--- a/src/utility.cpp
+++ b/src/utility.cpp
@@ -1,6 +1,6 @@
 /*
 Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Copyright (C) 2010-2012 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
@@ -17,436 +17,4 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-/*
-(c) 2010 Perttu Ahola <celeron55@gmail.com>
-*/
-
-#include "utility.h"
-#include "gettime.h"
-#include "sha1.h"
-#include "base64.h"
-#include "log.h"
-#include <iomanip>
-
-TimeTaker::TimeTaker(const char *name, u32 *result)
-{
-	m_name = name;
-	m_result = result;
-	m_running = true;
-	m_time1 = getTimeMs();
-}
-
-u32 TimeTaker::stop(bool quiet)
-{
-	if(m_running)
-	{
-		u32 time2 = getTimeMs();
-		u32 dtime = time2 - m_time1;
-		if(m_result != NULL)
-		{
-			(*m_result) += dtime;
-		}
-		else
-		{
-			if(quiet == false)
-				infostream<<m_name<<" took "<<dtime<<"ms"<<std::endl;
-		}
-		m_running = false;
-		return dtime;
-	}
-	return 0;
-}
-
-u32 TimeTaker::getTime()
-{
-	u32 time2 = getTimeMs();
-	u32 dtime = time2 - m_time1;
-	return dtime;
-}
-
-const v3s16 g_6dirs[6] =
-{
-	// +right, +top, +back
-	v3s16( 0, 0, 1), // back
-	v3s16( 0, 1, 0), // top
-	v3s16( 1, 0, 0), // right
-	v3s16( 0, 0,-1), // front
-	v3s16( 0,-1, 0), // bottom
-	v3s16(-1, 0, 0) // left
-};
-
-const v3s16 g_26dirs[26] =
-{
-	// +right, +top, +back
-	v3s16( 0, 0, 1), // back
-	v3s16( 0, 1, 0), // top
-	v3s16( 1, 0, 0), // right
-	v3s16( 0, 0,-1), // front
-	v3s16( 0,-1, 0), // bottom
-	v3s16(-1, 0, 0), // left
-	// 6
-	v3s16(-1, 1, 0), // top left
-	v3s16( 1, 1, 0), // top right
-	v3s16( 0, 1, 1), // top back
-	v3s16( 0, 1,-1), // top front
-	v3s16(-1, 0, 1), // back left
-	v3s16( 1, 0, 1), // back right
-	v3s16(-1, 0,-1), // front left
-	v3s16( 1, 0,-1), // front right
-	v3s16(-1,-1, 0), // bottom left
-	v3s16( 1,-1, 0), // bottom right
-	v3s16( 0,-1, 1), // bottom back
-	v3s16( 0,-1,-1), // bottom front
-	// 18
-	v3s16(-1, 1, 1), // top back-left
-	v3s16( 1, 1, 1), // top back-right
-	v3s16(-1, 1,-1), // top front-left
-	v3s16( 1, 1,-1), // top front-right
-	v3s16(-1,-1, 1), // bottom back-left
-	v3s16( 1,-1, 1), // bottom back-right
-	v3s16(-1,-1,-1), // bottom front-left
-	v3s16( 1,-1,-1), // bottom front-right
-	// 26
-};
-
-const v3s16 g_27dirs[27] =
-{
-	// +right, +top, +back
-	v3s16( 0, 0, 1), // back
-	v3s16( 0, 1, 0), // top
-	v3s16( 1, 0, 0), // right
-	v3s16( 0, 0,-1), // front
-	v3s16( 0,-1, 0), // bottom
-	v3s16(-1, 0, 0), // left
-	// 6
-	v3s16(-1, 1, 0), // top left
-	v3s16( 1, 1, 0), // top right
-	v3s16( 0, 1, 1), // top back
-	v3s16( 0, 1,-1), // top front
-	v3s16(-1, 0, 1), // back left
-	v3s16( 1, 0, 1), // back right
-	v3s16(-1, 0,-1), // front left
-	v3s16( 1, 0,-1), // front right
-	v3s16(-1,-1, 0), // bottom left
-	v3s16( 1,-1, 0), // bottom right
-	v3s16( 0,-1, 1), // bottom back
-	v3s16( 0,-1,-1), // bottom front
-	// 18
-	v3s16(-1, 1, 1), // top back-left
-	v3s16( 1, 1, 1), // top back-right
-	v3s16(-1, 1,-1), // top front-left
-	v3s16( 1, 1,-1), // top front-right
-	v3s16(-1,-1, 1), // bottom back-left
-	v3s16( 1,-1, 1), // bottom back-right
-	v3s16(-1,-1,-1), // bottom front-left
-	v3s16( 1,-1,-1), // bottom front-right
-	// 26
-	v3s16(0,0,0),
-};
-
-static unsigned long next = 1;
-
-/* RAND_MAX assumed to be 32767 */
-int myrand(void)
-{
-   next = next * 1103515245 + 12345;
-   return((unsigned)(next/65536) % 32768);
-}
-
-void mysrand(unsigned seed)
-{
-   next = seed;
-}
-
-int myrand_range(int min, int max)
-{
-	if(max-min > MYRAND_MAX)
-	{
-		errorstream<<"WARNING: myrand_range: max-min > MYRAND_MAX"<<std::endl;
-		assert(0);
-	}
-	if(min > max)
-	{
-		assert(0);
-		return max;
-	}
-	return (myrand()%(max-min+1))+min;
-}
-
-/*
-	blockpos: position of block in block coordinates
-	camera_pos: position of camera in nodes
-	camera_dir: an unit vector pointing to camera direction
-	range: viewing range
-*/
-bool isBlockInSight(v3s16 blockpos_b, v3f camera_pos, v3f camera_dir,
-		f32 camera_fov, f32 range, f32 *distance_ptr)
-{
-	v3s16 blockpos_nodes = blockpos_b * MAP_BLOCKSIZE;
-	
-	// Block center position
-	v3f blockpos(
-			((float)blockpos_nodes.X + MAP_BLOCKSIZE/2) * BS,
-			((float)blockpos_nodes.Y + MAP_BLOCKSIZE/2) * BS,
-			((float)blockpos_nodes.Z + MAP_BLOCKSIZE/2) * BS
-	);
-
-	// Block position relative to camera
-	v3f blockpos_relative = blockpos - camera_pos;
-
-	// Distance in camera direction (+=front, -=back)
-	f32 dforward = blockpos_relative.dotProduct(camera_dir);
-
-	// Total distance
-	f32 d = blockpos_relative.getLength();
-
-	if(distance_ptr)
-		*distance_ptr = d;
-	
-	// If block is very close, it is always in sight
-	if(d < 1.44*1.44*MAP_BLOCKSIZE*BS/2)
-		return true;
-
-	// If block is far away, it's not in sight
-	if(d > range)
-		return false;
-
-	// Maximum radius of a block
-	f32 block_max_radius = 0.5*1.44*1.44*MAP_BLOCKSIZE*BS;
-	
-	// If block is (nearly) touching the camera, don't
-	// bother validating further (that is, render it anyway)
-	if(d < block_max_radius)
-		return true;
-	
-	// Cosine of the angle between the camera direction
-	// and the block direction (camera_dir is an unit vector)
-	f32 cosangle = dforward / d;
-	
-	// Compensate for the size of the block
-	// (as the block has to be shown even if it's a bit off FOV)
-	// This is an estimate, plus an arbitary factor
-	cosangle += block_max_radius / d * 0.5;
-
-	// If block is not in the field of view, skip it
-	if(cosangle < cos(camera_fov / 2))
-		return false;
-
-	return true;
-}
-
-// Creates a string encoded in JSON format (almost equivalent to a C string literal)
-std::string serializeJsonString(const std::string &plain)
-{
-	std::ostringstream os(std::ios::binary);
-	os<<"\"";
-	for(size_t i = 0; i < plain.size(); i++)
-	{
-		char c = plain[i];
-		switch(c)
-		{
-			case '"': os<<"\\\""; break;
-			case '\\': os<<"\\\\"; break;
-			case '/': os<<"\\/"; break;
-			case '\b': os<<"\\b"; break;
-			case '\f': os<<"\\f"; break;
-			case '\n': os<<"\\n"; break;
-			case '\r': os<<"\\r"; break;
-			case '\t': os<<"\\t"; break;
-			default:
-			{
-				if(c >= 32 && c <= 126)
-				{
-					os<<c;
-				}
-				else
-				{
-					u32 cnum = (u32) (u8) c;
-					os<<"\\u"<<std::hex<<std::setw(4)<<std::setfill('0')<<cnum;
-				}
-				break;
-			}
-		}
-	}
-	os<<"\"";
-	return os.str();
-}
-
-// Reads a string encoded in JSON format
-std::string deSerializeJsonString(std::istream &is)
-{
-	std::ostringstream os(std::ios::binary);
-	char c, c2;
-
-	// Parse initial doublequote
-	is >> c;
-	if(c != '"')
-		throw SerializationError("JSON string must start with doublequote");
-
-	// Parse characters
-	for(;;)
-	{
-		c = is.get();
-		if(is.eof())
-			throw SerializationError("JSON string ended prematurely");
-		if(c == '"')
-		{
-			return os.str();
-		}
-		else if(c == '\\')
-		{
-			c2 = is.get();
-			if(is.eof())
-				throw SerializationError("JSON string ended prematurely");
-			switch(c2)
-			{
-				default:  os<<c2; break;
-				case 'b': os<<'\b'; break;
-				case 'f': os<<'\f'; break;
-				case 'n': os<<'\n'; break;
-				case 'r': os<<'\r'; break;
-				case 't': os<<'\t'; break;
-				case 'u':
-				{
-					char hexdigits[4+1];
-					is.read(hexdigits, 4);
-					if(is.eof())
-						throw SerializationError("JSON string ended prematurely");
-					hexdigits[4] = 0;
-					std::istringstream tmp_is(hexdigits, std::ios::binary);
-					int hexnumber;
-					tmp_is >> std::hex >> hexnumber;
-					os<<((char)hexnumber);
-					break;
-				}
-			}
-		}
-		else
-		{
-			os<<c;
-		}
-	}
-	return os.str();
-}
-
-// Get an sha-1 hash of the player's name combined with
-// the password entered. That's what the server uses as
-// their password. (Exception : if the password field is
-// blank, we send a blank password - this is for backwards
-// compatibility with password-less players).
-std::string translatePassword(std::string playername, std::wstring password)
-{
-	if(password.length() == 0)
-		return "";
-
-	std::string slt = playername + wide_to_narrow(password);
-	SHA1 sha1;
-	sha1.addBytes(slt.c_str(), slt.length());
-	unsigned char *digest = sha1.getDigest();
-	std::string pwd = base64_encode(digest, 20);
-	free(digest);
-	return pwd;
-}
-
-
-
-PointedThing::PointedThing():
-	type(POINTEDTHING_NOTHING),
-	node_undersurface(0,0,0),
-	node_abovesurface(0,0,0),
-	object_id(-1)
-{}
-
-std::string PointedThing::dump() const
-{
-	std::ostringstream os(std::ios::binary);
-	if(type == POINTEDTHING_NOTHING)
-	{
-		os<<"[nothing]";
-	}
-	else if(type == POINTEDTHING_NODE)
-	{
-		const v3s16 &u = node_undersurface;
-		const v3s16 &a = node_abovesurface;
-		os<<"[node under="<<u.X<<","<<u.Y<<","<<u.Z
-			<< " above="<<a.X<<","<<a.Y<<","<<a.Z<<"]";
-	}
-	else if(type == POINTEDTHING_OBJECT)
-	{
-		os<<"[object "<<object_id<<"]";
-	}
-	else
-	{
-		os<<"[unknown PointedThing]";
-	}
-	return os.str();
-}
-
-void PointedThing::serialize(std::ostream &os) const
-{
-	writeU8(os, 0); // version
-	writeU8(os, (u8)type);
-	if(type == POINTEDTHING_NOTHING)
-	{
-		// nothing
-	}
-	else if(type == POINTEDTHING_NODE)
-	{
-		writeV3S16(os, node_undersurface);
-		writeV3S16(os, node_abovesurface);
-	}
-	else if(type == POINTEDTHING_OBJECT)
-	{
-		writeS16(os, object_id);
-	}
-}
-
-void PointedThing::deSerialize(std::istream &is)
-{
-	int version = readU8(is);
-	if(version != 0) throw SerializationError(
-			"unsupported PointedThing version");
-	type = (PointedThingType) readU8(is);
-	if(type == POINTEDTHING_NOTHING)
-	{
-		// nothing
-	}
-	else if(type == POINTEDTHING_NODE)
-	{
-		node_undersurface = readV3S16(is);
-		node_abovesurface = readV3S16(is);
-	}
-	else if(type == POINTEDTHING_OBJECT)
-	{
-		object_id = readS16(is);
-	}
-	else
-	{
-		throw SerializationError(
-			"unsupported PointedThingType");
-	}
-}
-
-bool PointedThing::operator==(const PointedThing &pt2) const
-{
-	if(type != pt2.type)
-		return false;
-	if(type == POINTEDTHING_NODE)
-	{
-		if(node_undersurface != pt2.node_undersurface)
-			return false;
-		if(node_abovesurface != pt2.node_abovesurface)
-			return false;
-	}
-	else if(type == POINTEDTHING_OBJECT)
-	{
-		if(object_id != pt2.object_id)
-			return false;
-	}
-	return true;
-}
 
-bool PointedThing::operator!=(const PointedThing &pt2) const
-{
-	return !(*this == pt2);
-}
-- 
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