amxmodx/plugins/include/datapack.inc

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// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
// https://alliedmods.net/amxmodx-license
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#if defined _datapack_included
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#endinput
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#endif
#define _datapack_included
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/**
* Datapack tag declaration
*
* @note Datapacks provide a way to store and move around arbitrary amounts (and
* types) of data in AMX Mox X. Data is packed into a single cell value -
* the DataPack handle. This handle can be passed around more easily, can
* be returned by functions and can simulate advanced concepts like string
* consummation.
* @note Plugins are responsible for freeing all datapack handles they acquire.
* Failing to free handles will result in the plugin and AMXX leaking
* memory.
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*/
enum DataPack
{
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Invalid_DataPack = 0
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};
/**
* Creates a new datapack.
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*
* @return New datapack handle, which must be freed via DestroyDataPack().
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*/
native DataPack:CreateDataPack();
/**
* Packs a cell value into a datapack.
*
* @param pack Datapack handle
* @param cell Cell value to pack
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*
* @noreturn
* @error If an invalid handle is provided, an error will be thrown.
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*/
native WritePackCell(DataPack:pack, any:cell);
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/**
* Packs a float value into a datapack.
*
* @param pack Datapack handle
* @param val Float value to pack
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*
* @noreturn
* @error If an invalid handle is provided, an error will be thrown.
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*/
native WritePackFloat(DataPack:pack, Float:val);
/**
* Packs a string into a datapack.
*
* @param pack Datapack handle
* @param str String to pack
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*
* @return Length of copied string
* @error If an invalid handle is provided, an error will be thrown.
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*/
native WritePackString(DataPack:pack, const str[]);
/**
* Reads a cell from a Datapack.
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*
* @param pack Datapack handle
*
* @return Cell value
* @error If an invalid handle is provided, or not enough data is left
* in the datapack, an error will be thrown.
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*/
native any:ReadPackCell(DataPack:pack);
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/**
* Reads a float from a datapack.
*
* @param pack Datapack handle
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*
* @return Float value
* @error If an invalid handle is provided, or not enough data is left
* in the datapack, an error will be thrown.
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*/
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native Float:ReadPackFloat(DataPack:pack);
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/**
* Reads a string from a Datapack.
*
* @param pack Datapack handle
* @param buffer Buffer to copy string to
* @param maxlen Maximum size of buffer
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*
* @return Number of cells written to buffer
* @error If an invalid handle is provided, or not enough data is left
* in the datapack, an error will be thrown.
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*/
native ReadPackString(DataPack:pack, buffer[], maxlen);
/**
* Resets the datapack read/write position to the start.
*
* @param pack Datapack handle
* @param clear If true, clears the contained data
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*
* @noreturn
* @error If an invalid handle is provided, an error will be thrown.
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*/
native ResetPack(DataPack:pack, bool:clear = false);
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/**
* Returns the datapack read/write position.
*
* @param pack Datapack handle
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*
* @return Position in the datapack
* @error If an invalid handle is provided, an error will be thrown.
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*/
native GetPackPosition(DataPack:pack);
/**
* Sets the datapack read/write position.
*
* @note This should only ever be used with (known to be valid) positions
* returned by GetPackPosition(). It is not possible for plugins to safely
* compute datapack positions.
*
* @param pack Datapack handle
* @param position New position to set
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*
* @noreturn
* @error If an invalid handle is provided, or the new position is
* out of datapack bounds, an error will be thrown.
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*/
native SetPackPosition(DataPack:pack, position);
/**
* Returns if the datapack has reached its end and no more data can be read.
*
* @param pack Datapack handle
*
* @return True if datapack has reached the end, false otherwise
* @error If an invalid handle is provided, an error will be thrown.
*/
native bool:IsPackEnded(DataPack:pack);
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/**
* Destroys the datapack and frees its memory.
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*
* @param pack Datapack handle
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*
* @return True if disposed, false otherwise
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*/
native DestroyDataPack(&DataPack:pack);