/**

 * vim: set ts=4 :

 * ===============================================================

 * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

 * ===============================================================

 *

 *  This file is part of the SourceMod/SourcePawn SDK.  This file may only be used 

 * or modified under the Terms and Conditions of its License Agreement, which is found 

 * in LICENSE.txt.  The Terms and Conditions for making SourceMod extensions/plugins 

 * may change at any time.  To view the latest information, see:

 *   http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

#if defined _entity_included

 #endinput

#endif

#define _entity_included

/**

 * Property types for entities.

 */

enum PropType

{

	Prop_Send = 0,	/**< This property is networked. */

	Prop_Data = 1,	/**< This property is for saved game files. */

};

/**

 * For more information on these, see the HL2SDK (public/edict.h)

 */

#define FL_EDICT_CHANGED	(1<<0)	/**< Game DLL sets this when the entity state changes

										 Mutually exclusive with FL_EDICT_PARTIAL_CHANGE. */

#define FL_EDICT_FREE		(1<<1)	/**< this edict if free for reuse */

#define FL_EDICT_FULL		(1<<2)	/**< this is a full server entity */

#define FL_EDICT_FULLCHECK	(0<<0)  /**< call ShouldTransmit() each time, this is a fake flag */

#define FL_EDICT_ALWAYS		(1<<3)	/**< always transmit this entity */

#define FL_EDICT_DONTSEND	(1<<4)	/**< don't transmit this entity */

#define FL_EDICT_PVSCHECK	(1<<5)	/**< always transmit entity, but cull against PVS */

#define FL_EDICT_PENDING_DORMANT_CHECK	(1<<6)

#define FL_EDICT_DIRTY_PVS_INFORMATION	(1<<7)

#define FL_FULL_EDICT_CHANGED			(1<<8)

/**

 * Returns the maximum number of entities.

 *

 * @return				Maximum number of entities.

 */

native GetMaxEntities();

/**

 * Returns the number of entities in the server.

 *

 * @return				Number of entities in the server.

 */

native GetEntityCount();

/**

 * Returns whether or not an entity is valid.  Returns false

 * if there is no matching CBaseEntity for this edict index.

 *

 * @param edict			Index of the entity/edict.

 * @return				True if valid, false otherwise.

 */

native bool:IsValidEntity(edict);

/**

 * Returns whether or not an edict index is valid.

 *

 * @param edict			Index of the edict.

 * @return				True if valid, false otherwise.

 */

native bool:IsValidEdict(edict);

/**

 * Returns whether or not an entity is a valid networkable edict.

 *

 * @param edict			Index of the edict.

 * @return				True if networkable, false if invalid or not networkable.

 */

native bool:IsEntNetworkable(edict);

/**

 * Creates a new edict (the basis of a networkable entity)

 *

 * @return				Index of the edict, 0 on failure.

 */

native CreateEdict();

/** 

 * Removes an edict from the world.

 *

 * @param edict			Index of the edict.

 * @noreturn

 * @error				Invalid edict index.

 */

native RemoveEdict(edict);

/**

 * Returns the flags on an edict.  These are not the same as entity flags.

 *

 * @param edict			Index of the entity.

 * @return				Edict flags.

 * @error				Invalid edict index.

 */

native GetEdictFlags(edict);

/**

 * Sets the flags on an edict.  These are not the same as entity flags.

 *

 * @param edict			Index of the entity.

 * @param flags			Flags to set.

 * @noreturn

 * @error				Invalid edict index.

 */

native SetEdictFlags(edict, flags);

/**

 * Retrieves an edict classname.

 *

 * @param edict			Index of the entity.

 * @param clsname		Buffer to store the classname.

 * @param maxlength		Maximum length of the buffer.

 * @return				True on success, false if there is no classname set.

 */

native bool:GetEdictClassname(edict, String:clsname[], maxlength);

/**

 * Retrieves an entity's networkable serverclass name.

 * This is not the same as the classname and is used for networkable state changes.

 *

 * @param edict			Index of the entity.

 * @param clsname		Buffer to store the serverclass name.

 * @param maxlength		Maximum lnegth of the buffer.

 * @return				True on success, false if the edict is not networkable.

 * @error				Invalid edict index.

 */

native bool:GetEntityNetClass(edict, String:clsname[], maxlength);

/**

 * @section Entity offset functions

 *

 * Offsets should be specified in byte distance from the CBaseEntity 

 * structure, not short (double byte) or integer (four byte) multiples.  

 * It is somewhat common practice to use offsets aligned to their final 

 * type, and thus make sure you are not falling to this error in SourceMod.

 * For example, if your "integer-aligned" offset was 119, your byte-aligned

 * offset is 119*4, or 476.

 * Specifying incorrect offsets or the incorrect data type for an offset

 * can have fatal consequences.  If you are hardcoding offsets, and the 

 * layout of CBaseEntity does not match, you can easily crash the server.

 *

 * The reasonable bounds for offsets is greater than or equal to 0 and 

 * below 32768.  Offsets out of these bounds will throw an error.  However,

 * this does not represent any real range, it is simply a sanity check for

 * illegal values.  Any range outside of the CBaseEntity structure's private

 * size will cause undefined behaviour or even crash.

 */

/**

 * Marks an entity as state changed.  This can be useful if you set an offset 

 * and wish for it to be immediately changed over the network.  By default this 

 * is not done for offset setting functions.  

 *

 * @param edict			Index to the edict.

 * @param offset		Offset to mark as changed.  If 0, 

 *						the entire edict is marked as changed.

 * @noreturn

 * @error				Invalid entity or offset out of bounds.

 */

native ChangeEdictState(edict, offset = 0);

/**

 * Peeks into an entity's object data and retrieves the integer value at 

 * the given offset.

 * 

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @param size			Number of bytes to read (valid values are 1, 2, or 4).

 * @return				Value at the given memory location.

 * @error				Invalid entity or offset out of reasonable bounds.

 */

native GetEntData(entity, offset, size=4);

/**

 * Peeks into an entity's object data and sets the integer value at 

 * the given offset.

 *

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @param size			Number of bytes to write (valid values are 1, 2, or 4).

 * @param changeState	If true, change will be sent over the network.

 * @return				Value at the given memory location.

 * @error				Invalid entity or offset out of reasonable bounds.

 * @noreturn

 */

native SetEntData(entity, offset, value, size=4, bool:changeState=false);

/**

 * Peeks into an entity's object data and retrieves the float value at 

 * the given offset.

 * 

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @return				Value at the given memory location.

 * @error				Invalid entity or offset out of reasonable bounds.

 */

native Float:GetEntDataFloat(entity, offset);

/**

 * Peeks into an entity's object data and sets the integer value at 

 * the given offset.

 *

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @param changeState	If true, change will be sent over the network.

 * @return				Value at the given memory location.

 * @error				Invalid entity or offset out of reasonable bounds.

 * @noreturn

 */

native SetEntDataFloat(entity, offset, Float:value, bool:changeState=false);

/**

 * Peeks into an entity's object data and retrieves the entity handle

 * info at the given offset.

 * 

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @return				Entity index at the given location, or 0 if none.

 * @error				Invalid entity or offset out of reasonable bounds.

 */

native GetEntDataEnt(entity, offset);

/**

 * Peeks into an entity's object data and sest the entity handle info

 * at the given offset.

 * 

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @param other			Entity index to set, or 0 to clear.

 * @param changeState	If true, change will be sent over the network.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

native SetEntDataEnt(entity, offset, other, bool:changeState=false);

/**

 * Peeks into an entity's object data and retrieves the vector at the 

 * given offset.

 * @note Both a Vector and a QAngle are three floats.  This is a 

 * convenience function and will work with both types.

 * 

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @param vec			Vector buffer to store data in.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

native GetEntDataVector(entity, offset, Float:vec[3]);

/**

 * Peeks into an entity's object data and sets the vector at the given 

 * offset.

 * @note Both a Vector and a QAngle are three floats.  This is a 

 * convenience function and will work with both types.

 * 

 * @param entity		Edict index.

 * @param offset		Offset to use.

 * @param vec			Vector to set.

 * @param changeState	If true, change will be sent over the network.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

native SetEntDataVector(entity, offset, const Float:vec[3], bool:changeState=false);

/**

 * @endsection

 */

/**

 * Given a ServerClass name, finds a networkable send property offset.

 * This information is cached for future calls.

 *

 * @param cls			Classname.

 * @param prop			Property name.

 * @return				An offset, or -1 on failure.

 */

native FindSendPropOffs(const String:cls[], const String:prop[]);

/**

 * Wrapper function for finding a send property for a particular entity.

 *

 * @param ent			Entity index.

 * @param prop			Property name.

 * @return				An offset, or -1 on failure.

 */

stock GetEntSendPropOffs(ent, const String:prop[])

{

	decl String:cls[64];

	if (!GetEntityNetClass(ent, cls, sizeof(cls)))

	{

		return -1;

	}

	return FindSendPropOffs(cls, prop);

}

/**

 * Gets a network property as an integer; wrapper around GetEntData().

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @param size			Number of bytes to read (valid values are 1, 2, or 4).

 * @return				Value at the given property offset.

 * @error				Invalid entity or property not found.

 */

stock GetEntProp(entity, PropType:type, const String:prop[], size=4)

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return GetEntData(entity, offs, size);

}

/**

 * Sets a network property as an integer; wrapper around GetEntData().

 *

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @param size			Number of bytes to write (valid values are 1, 2, or 4).

 * @error				Invalid entity or offset out of reasonable bounds.

 * @noreturn

 */

stock SetEntProp(entity, PropType:type, const String:prop[], value, size=4)

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return SetEntData(entity, offs, value, size, true);

}

/**

 * Gets a network property as a float; wrapper around GetEntDataFloat().

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @return				Value at the given property offset..

 * @error				Invalid entity or offset out of reasonable bounds.

 */

stock Float:GetEntPropFloat(entity, PropType:type, const String:prop[])

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return GetEntDataFloat(entity, offs);

}

/**

 * Sets a network property as a float; wrapper around SetEntDataFloat().

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @param value			Value to set.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

stock SetEntPropFloat(entity, PropType:type, const String:prop[], Float:value)

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return SetEntDataFloat(entity, offs, value, true);

}

/**

 * Gets a network property as a handle entity; wrapper around GetEntDataEnt().

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @return				Entity index at the given property, or 0 if none.

 * @error				Invalid entity or offset out of reasonable bounds.

 */

stock GetEntPropEnt(entity, PropType:type, const String:prop[])

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return GetEntDataEnt(entity, offs);

}

/**

 * Sets a network property as a handle entity; wrapper around SetEntDataEnt().

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @param other			Entity index to set, or 0 to unset.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

stock SetEntPropEnt(entity, PropType:type, const String:prop[], other)

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return SetEntDataEnt(entity, offs, other, true);

}

/**

 * Gets a network property as a vector; wrapper around GetEntDataVector().

 * @note Both a Vector and a QAngle are three floats.  This is a 

 * convenience function and will work with both types.

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @param vec			Vector buffer to store data in.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

stock GetEntPropVector(entity, PropType:type, const String:prop[], Float:vec[3])

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return GetEntDataVector(entity, offs, vec);

}

/**

 * Sets a network property as a vector; wrapper around SetEntDataVector().

 * @note Both a Vector and a QAngle are three floats.  This is a 

 * convenience function and will work with both types.

 * 

 * @param entity		Edict index.

 * @param type			Property type.

 * @param prop			Property to use.

 * @param vec			Vector to set.

 * @noreturn

 * @error				Invalid entity or offset out of reasonable bounds.

 */

stock SetEntPropVector(entity, PropType:type, const String:prop[], const Float:vec[3])

{

	new offs = GetEntSendPropOffs(entity, prop);

	if (offs == -1)

	{

		ThrowError("Property \"%s\" not found for entity %d", prop, entity);

	}

	return SetEntDataVector(entity, offs, vec, true);

}