My strategy is to implement the most common properties that are found in file available on the net. I recently added LB and TR, because a user asked me to do it.
Here is part of the sgf reader for 2.0 version of xgoban. This is a map between the property name, the internal property number and the read/write routines for the property. But not every property in this map is displayed by xgoban (currently). This was also a first attempt to support multiple sets (the second field is a mask for several sets) but it will fail when different sets have the same property name with a different meaning. I should have multiple tables.
#define EveryGame (~0)
#define Go (1 << SG_Go)
#define Common (1 << 0)
#define XGoban (1 << 7)
SG_KWData sgf_keyword[] = {
{ EveryGame , Common , "B" , SG_Black , SGF_ReadGoMove , SGF_WriteGoMove , },
{ EveryGame , Common , "W" , SG_White , SGF_ReadGoMove , SGF_WriteGoMove , },
{ EveryGame , Common , "C" , SG_Comment , SGF_ReadExtendedText , SGF_WriteText , },
{ EveryGame , Common , "N" , SG_NodeName , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "V" , SG_NodeValue , SGF_ReadNumber , SGF_WriteNumber , },
{ EveryGame , Common , "CH" , SG_Check , SGF_ReadTriple , SGF_WriteTriple , },
{ EveryGame , Common , "GB" , SG_GoodBlack , SGF_ReadTriple , SGF_WriteTriple , },
{ EveryGame , Common , "GW" , SG_GoodWhite , SGF_ReadTriple , SGF_WriteTriple , },
{ EveryGame , Common , "TE" , SG_Tesuji , SGF_ReadTriple , SGF_WriteTriple , },
{ EveryGame , Common , "BM" , SG_BadMove , SGF_ReadTriple , SGF_WriteTriple , },
{ EveryGame , Common , "TU" , SG_TimeUsed , SGF_ReadReal , SGF_WriteReal , },
{ EveryGame , Common , "BL" , SG_BlackLeft , SGF_ReadReal , SGF_WriteReal , },
{ EveryGame , Common , "WL" , SG_WhiteLeft , SGF_ReadReal , SGF_WriteReal , },
{ EveryGame , Common , "FG" , SG_Figure , SGF_ReadNone , SGF_WriteNone , },
{ EveryGame , Common , "AB" , SG_AddBlack , SGF_ReadStones , SGF_WritePoints , },
{ EveryGame , Common , "AW" , SG_AddWhite , SGF_ReadStones , SGF_WritePoints , },
{ EveryGame , Common , "AE" , SG_AddEmpty , SGF_ReadStones , SGF_WritePoints , },
{ EveryGame , Common , "PL" , SG_Player , SGF_ReadPlayer , NULL , },
{ EveryGame , Common , "GN" , SG_GameName , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "GC" , SG_GameComment , SGF_ReadExtendedText , SGF_WriteText , },
{ EveryGame , Common , "EV" , SG_Event , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "RO" , SG_Round , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "DT" , SG_Date , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "PC" , SG_Place , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "PB" , SG_BlackPlayer , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "PW" , SG_WhitePlayer , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "RE" , SG_Result , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "US" , SG_User , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "TM" , SG_Time , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "SO" , SG_Source , SGF_ReadSimpleText , SGF_WriteText , },
{ EveryGame , Common , "GM" , SG_Game , SGF_ReadNumber , SGF_WriteNumber , },
{ EveryGame , Common , "SZ" , SG_Size , SGF_ReadNumber , SGF_WriteNumber , },
{ EveryGame , Common , "VW" , SG_View , SGF_ReadPoints , SGF_WritePoints , },
{ EveryGame , Common , "BS" , SG_BlackSpec , SGF_ReadNumber , SGF_WriteNumber , },
{ EveryGame , Common , "WS" , SG_WhiteSpec , SGF_ReadNumber , SGF_WriteNumber , },
{ EveryGame , Common , "EL" , SG_Evaluation , SGF_ReadNumber , SGF_WriteNumber , },
{ EveryGame , Common , "EX" , SG_Expected , SGF_ReadPoints , SGF_WritePoints , },
{ EveryGame , Common , "SL" , SG_Selected , SGF_ReadPoints , SGF_WritePoints , },
{ EveryGame , Common , "M" , SG_Marked , SGF_ReadPoints , SGF_WritePoints , },
{ EveryGame , Common , "L" , SG_Letters , SGF_ReadPoints , SGF_WritePoints , },
{ EveryGame , XGoban , "NU" , SG_NodeNumber , SGF_ReadNumber , SGF_WriteNumber , },
/*
* Go specific
*/
{ Go , Common , "BR" , SG_BlackRank , SGF_ReadSimpleText , SGF_WriteText , },
{ Go , Common , "WR" , SG_WhiteRank , SGF_ReadSimpleText , SGF_WriteText , },
{ Go , Common , "HA" , SG_Handicap , SGF_ReadNumber , SGF_WriteNumber , },
{ Go , Common , "KM" , SG_Komi , SGF_ReadReal , SGF_WriteReal , },
{ Go , Common , "TB" , SG_BlackTerritory , SGF_ReadPoints , SGF_WritePoints , },
{ Go , Common , "TW" , SG_WhiteTerritory , SGF_ReadPoints , SGF_WritePoints , },
{ Go , Common , "SC" , SG_Secure , SGF_ReadPoints , SGF_WritePoints , },
{ Go , Common , "RG" , SG_Region , SGF_ReadPoints , SGF_WritePoints , },
{ Go , Common , "KO" , SG_Ko , SGF_ReadPoints , SGF_WritePoints , },
{ Go , Common , "SK" , SG_Seki , SGF_ReadPoints , SGF_WritePoints , },
{ Go , Common , "TN" , SG_NeutralTerritory , SGF_ReadPoints , SGF_WritePoints , },
{ Go , XGoban , "PR" , SG_Prisoners , SGF_ReadPoints , SGF_WritePoints , },
/*
* Extensions
*/
{ EveryGame , Common , "FF" , SG_FileFormat , SGF_ReadFileFormat , SGF_WriteNumber , },
{ Go , Common , "LB" , SG_Labeled , SGF_ReadLabeledPoints , SGF_WriteLabeledPoints, },
{ Go , Common , "TR" , SG_Triangle , SGF_ReadPoints , SGF_WriteNumber , },
{ Go , XGoban , "SQ" , SG_Square , SGF_ReadPoints , SGF_WriteNumber , },
{ Go , Common , "DM" , SG_Diamond , SGF_ReadPoints , SGF_WriteNumber , },
/*
* Other game specific
*/
/*
* Last entry
*/
{ EveryGame , NULL , NULL , 0 , NULL , NULL , },
};
Martin Müller, mueller@inf.ethz.ch