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--- public:gtql:gt-log_library [2007/12/16 21:23] – jonheidur
+++ public:gtql:gt-log_library [2024/04/29 13:33] (current) – external edit 127.0.0.1
@@ Line 2: / Line 2: @@
 The Log library can be used in game-playing programs and other search programs to log search trees to file.
+Example of usage can be found here:
+{{public:gtql:logging_game_trees.rtf|}}
 Download the GT-Log Library here:
 {{public:gtql:loglibrary.rar|}}
-Below is an example to show how to use the game-tree log interface in a game program. We
-use here a simple iterative deepening and minimax procedure for demonstration purposes
-(and omit various details that are not relevant for our demonstration purposes). Essentially,
-one must create a handle in the beginning (and delete in the end), open a new file
-for each search iteration, and call special functions when entering/exiting a node. The
-user collects the information he or she want to log in the structure data.
-/* Example TicTacToc program. */
-#include "gt_log.h"
-...
-GTDataDescript gtDataDescr = /* <= GTL data description */
-{ "TicTacToe", sizeof(Data_t), 0, {}, 5,
-{ ...
-{ "depth", offsetof(Data_t,depth), sizeof(int) },
-{ "best" , offsetof(Data_t,best), sizeof(int) },
-{ "type" , offsetof(Data_t,type), sizeof(int) } }
-};
-GTLogHdl hGTL; /* <= Game-tree log handle. */
-Value Minimax( Position_t *pos, int depth, Move_t move_last ) {
-Data_t data; /* <= GTL data record, user defined. */
-...
-data.depth = depth;
-gtl_enterNode( hGTL, move_last ); /* <= GTL enter node.*/
-...
-n = generateMoves(pos, moves);
-for ( i=0 ; i<n ; i++ ) {
-makeMove( pos, moves[i] );
-value = -Minimax( pos, depth-1, moves[i] );
-...
-retractMove( pos, moves[i] );
-}
-...
-data.best = best;
-gtl_exitNode( hGTL, &data ); /* <= GTL exit node */
-return best;
-}
-Value IterativeDeepening( ... ) {
-...
-for ( iter=1 ; iter<=maxIter ; ++iter ) {
-...
-gtl_startTree( hGTL, filename, strFEN ); /* <= GTL open new game-tree log file */
-...
-value = Minimax( &pos, iter, NULL_MOVE );
-...
-gtl_stopTree( hGTL ); /* <= GTL close tree */
-}
-...
-}
-int main() {
-...
-hGTL = gtl_newHdl( "TicTacToe", &gtDataDescr ); /* <= GTL new handle */
-if ( hGTL == NULL ) exit(EXIT_FAILURE);
-...
-gtl_deleteHdl( &hGTL ); /* <= GTL delete handle */
-...
-}