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7b3646a012
* Update include files documentation * Fix inconcistencies with spaces/tabs, some changes * Update fun, nvault, vector * Update sqlx.inc
583 lines
18 KiB
SourcePawn
583 lines
18 KiB
SourcePawn
// vim: set ts=4 sw=4 tw=99 noet:
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//
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// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
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// Copyright (C) The AMX Mod X Development Team.
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//
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// This software is licensed under the GNU General Public License, version 3 or higher.
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// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
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// https://alliedmods.net/amxmodx-license
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//
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// SQLX - Newer SQL Database API
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//
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#if defined _sqlx_included
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#endinput
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#endif
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#define _sqlx_included
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//eh..
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#define SQL_NumRows SQL_NumResults
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#pragma reqclass sqlx
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#if !defined AMXMODX_NOAUTOLOAD
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#pragma defclasslib sqlx mysql
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#endif
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enum Handle
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{
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Empty_Handle
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};
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/**
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* Creates a connection information tuple. This tuple must be passed
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* into connection routines.
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*
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* @note Freeing the tuple is not necessary, but is a good idea if you create
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* many of them. You can cache these handles globally.
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* @note This does not connect to the DB; it only caches the connection information.
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*
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* @param host Database host
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* @param user Database user
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* @param pass Database password
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* @param db Database name to use
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* @param timeout Specifies how long connections should wait before giving up.
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* If <= 0, the default of 60s is used.
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*
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* @return A newly created tuple handle to be used in connection routines.
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*/
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native Handle:SQL_MakeDbTuple(const host[], const user[], const pass[], const db[], timeout=0);
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/**
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* Frees an SQL handle.
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*
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* @note The handle can be to anything (tuple, connection, query, results, etc).
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* @note If you free the database connection handle, it closes the connection as well.
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*
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* @param h Handle to be freed.
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*
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* @noreturn
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*/
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native SQL_FreeHandle(Handle:h);
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/**
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* Opens a database connection.
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*
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* @param cn_tuple Tuple handle, returned from SQL_MakeDbTuple().
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* @param errcode An error code set by reference.
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* @param error String where error string will be stored.
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* @param maxlength Maximum length of the error buffer.
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*
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* @return Returns an SQL connection handle, which must be freed.
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* Returns Empty_Handle on failure.
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* @error Invalid info tuple handle.
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*/
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native Handle:SQL_Connect(Handle:cn_tuple, &errcode, error[], maxlength);
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/**
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* Sets the character set of the current connection.
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* Like SET NAMES .. in mysql, but stays after connection problems.
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*
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* @note If a connection tuple is supplied, this should be called before SQL_Connect or SQL_ThreadQuery.
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* @note The change will remain until you call this function with another value.
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* @note This native does nothing in SQLite.
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*
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* Example: "utf8", "latin1"
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*
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* @param h Database or connection tuple Handle.
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* @param charset The character set string to change to.
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*
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* @return True, if character set was changed, false otherwise.
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*/
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native bool:SQL_SetCharset(Handle:h, const charset[]);
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/**
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* Prepares a query.
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*
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* @note This does not actually do a query!
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*
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* @param db Connection handle, returned from SQL_Connect().
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* @param fmt Query string. Can be formated with format specifiers.
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* @param ... Additional format specifiers used to format the query.
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*
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* @return Returns an SQL query handle, which must always be freed.
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* Returns Empty_Handle on failure.
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*/
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native Handle:SQL_PrepareQuery(Handle:db, const fmt[], any:...);
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/**
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* Back-quotes characters in a string for database querying.
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*
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* @note The buffer's maximum size should be 2*strlen(string) to catch all scenarios.
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*
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* @param db Database handle for localization, or Empty_Handle
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* for when a handle is not available.
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* @param buffer Buffer to copy to.
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* @param buflen Maximum size of the buffer.
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* @param string String to backquote (should not overlap buffer).
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*
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* @return Length of new string, or -1 on failure.
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* @error Invalid database handle.
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*/
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native SQL_QuoteString(Handle:db, buffer[], buflen, const string[]);
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/**
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* Back-quotes characters in a string for database querying.
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* Note: The buffer's maximum size should be 2*strlen(string) to catch
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* all scenarios.
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*
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* @param db Database handle for localization, or Empty_Handle
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* for when a handle is not available.
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* @param buffer Buffer to copy to.
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* @param buflen Maximum size of the buffer.
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* @param fmt Format of string to backquote (should not overlap buffer).
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* @param ... Format arguments.
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*
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* @return Length of new string, or -1 on failure.
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*/
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native SQL_QuoteStringFmt(Handle:db, buffer[], buflen, const fmt[], any:...);
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/**
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* Threaded query states. Used to check the state of a complete threaded query.
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*/
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#define TQUERY_CONNECT_FAILED -2
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#define TQUERY_QUERY_FAILED -1
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#define TQUERY_SUCCESS 0
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/**
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* Prepares and executes a threaded query.
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* @note The handler should look like:
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* public QueryHandler(failstate, Handle:query, error[], errnum, data[], size, Float:queuetime)
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* failstate - One of the three TQUERY_ defines.
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* query - Handle to the query, do not free it.
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* error - An error message, if any.
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* errnum - An error code, if any.
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* data - Data array you passed in.
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* size - Size of the data array you passed in.
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* queuetime - Amount of gametime that passed while the query was resolving.
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* @note This will not interrupt gameplay in the event of a poor/lossed
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* connection, however, the interface is more complicated and
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* asynchronous. Furthermore, a new connection/disconnection is
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* made for each query to simplify driver support.
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* @note The handle does not need to be freed.
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*
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* @param db_tuple Tuple handle, returned from SQL_MakeDbTuple().
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* @param handler A function to be called when the query finishes. It has to be public.
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* @param query The query string.
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* @param data Additional data array that will be passed to the handler function.
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* @param dataSize The size of the additional data array.
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*
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* @noreturn
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* @error Thread worker was unable to start.
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* Invalid info tuple handle.
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* Handler function not found.
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*/
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native SQL_ThreadQuery(Handle:db_tuple, const handler[], const query[], const data[]="", dataSize=0);
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/**
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* Executes an already prepared query.
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*
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* @note You can call this multiple times as long as its parent connection is kept open.
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* Each time the result set from the previous call will be freed.
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*
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* @param query Handle of a prepared query to be executed.
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*
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* @return 1 if the query succeeded, 0 if the query failed.
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* @error Invalid query handle.
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*/
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native SQL_Execute(Handle:query);
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/**
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* Gets information about a failed query error.
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*
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* @param query Handle of a query to extract the error from.
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* @param error Buffer where to store the error string.
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* @param maxlength The maximum length of the output buffer.
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*
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* @return The error code.
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*/
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native SQL_QueryError(Handle:query, error[], maxlength);
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/**
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* Checks whether there are more results to be read.
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*
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* @param query Handle of a query to check.
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*
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* @return 1 if there are more results, 0 otherwise.
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* @error Invalid query handle.
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*/
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native SQL_MoreResults(Handle:query);
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/**
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* Tells whether a specific column in the current row is NULL or not.
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*
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* @param query Handle of a query to check.
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* @param column Which column to check for NULL.
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*
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* @return 1 if the column is NULL, 0 otherwise.
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* @error Invalid query handle.
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* No result set in this query.
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* Invalid column.
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*/
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native SQL_IsNull(Handle:query, column);
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/**
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* Retrieves the current result.
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*
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* @note A successful query starts at the first result, so you should not call
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* SQL_NextRow() first.
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*
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* @note Example how to get different types of values:
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* new num = SQL_ReadResult(query, 0)
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* new Float:num2
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* new string[32]
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* SQL_ReadResult(query, 1, num2)
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* SQL_ReadResult(query, 2, string, charsmax(string))
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*
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* @param query Handle of a query to read results from.
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* @param column Which column to get the value from.
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* @param ... Passing no extra arguments - returns an integer.
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* Passing one extra argument - returns a float in the first extra argument
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* Passing two extra params - returns a string in the first argument
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* with a maximum string length in the second argument.
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*
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* @return If no extra arguments are passed, returns an integer value.
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* @error Invalid query handle.
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*/
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native SQL_ReadResult(Handle:query, column, any:...);
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/**
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* Advances to the next result (row).
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*
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* @param query Handle of a query.
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*
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* @noreturn
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* @error Invalid query handle.
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* No result set in this query.
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*/
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native SQL_NextRow(Handle:query);
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/**
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* Returns the number of affected rows by a query.
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*
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* @param query Handle of a query to check.
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*
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* @return The number of affected rows.
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* @error Invalid query handle.
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*/
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native SQL_AffectedRows(Handle:query);
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/**
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* The number of retrieved rows (results) after a query.
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*
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* @param query Handle of a query to check.
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*
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* @return The number of retrieved rows by the query.
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* @error Invalid query handle.
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*/
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native SQL_NumResults(Handle:query);
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/**
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* Returns the total number of columns.
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*
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* @param query Handle of a query to check.
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*
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* @return The number of retrieved columns by the query.
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* @error Invalid query handle.
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* No result set in this query.
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*/
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native SQL_NumColumns(Handle:query);
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/**
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* Retrieves the name of a column by its index.
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*
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* @param query Handle of a query.
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* @param num The number (index) of a column to retrieve the name from.
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* @param name Buffer where to store the column's name.
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* @param maxlength Maximum length of the output buffer.
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*
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* @noreturn
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* @error Invalid query handle.
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* No result set in this query.
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* Invalid column index.
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*/
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native SQL_FieldNumToName(Handle:query, num, name[], maxlength);
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/**
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* Retrieves the number of a named column.
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*
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* @param query Handle of a query.
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* @param name Name to search for.
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*
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* @return Column index if found (>= 0); -1 otherwise.
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* @error Invalid query handle.
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* No result set in this query.
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*/
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native SQL_FieldNameToNum(Handle:query, const name[]);
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/**
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* Rewinds a result set to the first row.
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*
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* @param query Handle of a query to rewind the result set of.
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*
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* @noreturn
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* @error Invalid query handle.
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* No result set in this query.
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*/
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native SQL_Rewind(Handle:query);
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/**
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* Retrieves the instert ID of the latest INSERT query.
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*
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* @param query Handle of a query.
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*
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* @return The insert ID of the latest INSERT query.
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* @error Invalid query handle.
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*/
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native SQL_GetInsertId(Handle:query);
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/**
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* Retrieves which driver is this plugin currently bound to.
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*
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* @param driver Buffer to store the driver name in.
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* @param maxlen Maximum length of the output buffer.
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*
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* @noreturn
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*/
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native SQL_GetAffinity(driver[], maxlen);
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/**
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* Sets driver affinity. You can use this to force a particular driver implementation.
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* This will automatically change all SQL natives in your plugin to be "bound" to
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* the module in question.
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*
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* @note Using this while you have open handles to another database type will
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* cause problems. I.e., you cannot open a handle, switch affinity,
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* then close the handle with a different driver.
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* @note Switching affinity is an O(n * m) operation, where n is the number of
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* SQL natives and m is the number of used natives in total.
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* @note Intuitive programmers will note that this causes problems for
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* threaded queries. You will have to either force your script to work
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* under one affinity, or to pack the affinity type into the query data,
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* check it against the current, then set the new affinity if necessary.
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* Then, restore the old one for safety.
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*
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* @param driver The name of a driver to use.
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*
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* @return If no module with the given name is found, returns 0.
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* Unless your plugin is bult to handle different driver
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* types at once, you should let this error pass.
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*/
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native SQL_SetAffinity(const driver[]);
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/**
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* Returns the original query string that a query handle used.
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*
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* @param query Handle of a query.
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* @param buffer Buffer where to put the query string in.
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* @param maxlength The maximum length of the output buffer.
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*
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* @noreturn
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* @error Invalid query handle.
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*/
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native SQL_GetQueryString(Handle:query, buffer[], maxlength);
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/**
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* For queries which return multiple result sets, this advances to the next
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* result set if one is available. Otherwise, the current result set is
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* destroyed and will no longer be accessible.
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*
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* @note This function will always return false on SQLite, and when using threaded
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* queries in MySQL. Nonetheless, it has the same effect of removing the last
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* result set.
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*
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* @param query Query Handle.
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*
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* @return True on success, false on failure.
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* @error Invalid query handle.
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* No result set in this query.
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*/
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native bool:SQL_NextResultSet(Handle:query);
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/**
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* This function can be used to find out if a table in a SQLite database exists.
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*
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* @param db Connection handle returned from SQL_Connect().
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* @param table The table name to check for.
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*
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* @return True if it exists, false otherwise.
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*/
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stock bool:sqlite_TableExists(Handle:db, const table[])
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{
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new Handle:query = SQL_PrepareQuery(
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db,
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"SELECT name FROM sqlite_master WHERE type='table' AND name='%s' LIMIT 1;",
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table);
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if (!SQL_Execute(query) || !SQL_NumResults(query))
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{
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SQL_FreeHandle(query);
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return false;
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}
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SQL_FreeHandle(query);
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return true;
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}
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/**
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* Use this for executing a query where you don't care about the result.
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*
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* @param db Connection handle returned from SQL_Connect().
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* @param query The query string.
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* @param error If an error occurs, it will be placed into this buffer.
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* @param maxlength Maximum length of the error buffer.
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* @param rows Optional. If put, retrieves the number of rows the query returned.
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*
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* @return 1 on success, 0 on failure.
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*/
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stock SQL_SimpleQuery(Handle:db, const query[], error[]="", maxlength=0, &rows=0)
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{
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new Handle:hQuery = SQL_PrepareQuery(db, "%s", query);
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if (!SQL_Execute(hQuery))
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{
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SQL_QueryError(hQuery, error, maxlength);
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SQL_FreeHandle(hQuery);
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return 0;
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}
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rows = SQL_NumResults(hQuery);
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SQL_FreeHandle(hQuery);
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return 1;
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}
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/**
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* Use this for executing a query where you don't care about the result.
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*
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* @note Differs from SQL_SimpleQuery() because the query can be formated.
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*
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* @param db Connection handle returned from SQL_Connect().
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* @param error If an error occurs, it will be placed into this buffer.
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* @param maxlength The maximum length of the error buffer.
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* @param rows Optional. If put, retrieves the number of rows the query returned.
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* @param fmt The query string that can be formated with format specifiers.
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* @param ... Additional arguments for formating the query.
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*
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* @return 1 on success, 0 on failure.
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*/
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stock SQL_SimpleQueryFmt(Handle:db, error[]="", maxlength=0, &rows=0, const fmt[], any:...)
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{
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static query_buf[2048];
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vformat(query_buf, 2047, fmt, 6);
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new Handle:hQuery = SQL_PrepareQuery(db, "%s", query_buf);
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if (!SQL_Execute(hQuery))
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{
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SQL_QueryError(hQuery, error, maxlength);
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SQL_FreeHandle(hQuery);
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return 0;
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}
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rows = SQL_NumResults(hQuery);
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SQL_FreeHandle(hQuery);
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return 1;
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}
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/**
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* Use this for executing a query and not caring about the error.
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*
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* @param db A connection handle returned from SQL_Connect().
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* @param queryfmt The query string that can be formated with format specifiers.
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* @pram ... Additional arguments for formating the query.
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*
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* @return 1 on error.
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* >= 0 on success (with the number of affected rows).
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*/
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|
stock SQL_QueryAndIgnore(Handle:db, const queryfmt[], any:...)
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{
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static query[4096];
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new Handle:hQuery;
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new ret;
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vformat(query, sizeof(query)-1, queryfmt, 3);
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hQuery = SQL_PrepareQuery(db, "%s", query);
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if (SQL_Execute(hQuery))
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{
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ret = SQL_AffectedRows(hQuery);
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} else {
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ret = -1;
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}
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SQL_FreeHandle(hQuery);
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|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Use this for making a standard DB Tuple, using AMXX's database info cvars.
|
|
*
|
|
* @param timeout Specifies how long connections should wait before giving up.
|
|
* If 0, the value is read from "amx_sql_timeout" cvar.
|
|
*
|
|
* @return A newly created tuple handle to be used in connection routines.
|
|
*/
|
|
stock Handle:SQL_MakeStdTuple(timeout = 0)
|
|
{
|
|
static host[64], user[32], pass[32], db[128];
|
|
static get_type[12], set_type[12];
|
|
|
|
get_cvar_string("amx_sql_host", host, 63);
|
|
get_cvar_string("amx_sql_user", user, 31);
|
|
get_cvar_string("amx_sql_pass", pass, 31);
|
|
get_cvar_string("amx_sql_type", set_type, 11);
|
|
get_cvar_string("amx_sql_db", db, 127);
|
|
|
|
if (timeout <= 0)
|
|
{
|
|
timeout = get_cvar_num("amx_sql_timeout");
|
|
}
|
|
|
|
SQL_GetAffinity(get_type, 12);
|
|
|
|
if (!equali(get_type, set_type))
|
|
{
|
|
if (!SQL_SetAffinity(set_type))
|
|
{
|
|
log_amx("Failed to set affinity from %s to %s.", get_type, set_type);
|
|
}
|
|
}
|
|
|
|
return SQL_MakeDbTuple(host, user, pass, db, timeout);
|
|
}
|