char ConvertJSONEscape(const char **in)
{
int uc;
char c = *++(*in);
switch (c) {
case 'u': {
/* \u is a Unicode escape; 4 hex digits follow. */
const char* digits = *in + 1;
*in += 4;
uc = (digitToInt(digits[0]) << 12) | (digitToInt(digits[1]) << 8) |
(digitToInt(digits[2]) << 4) | (digitToInt(digits[3]));
if (uc > 127)
fprintf(stderr, "CouchStore CollateJSON: Can't correctly compare \\u%.4s\n", digits);
return (char)uc;
}
case 'b': return '\b';
case 'n': return '\n';
case 'r': return '\r';
case 't': return '\t';
default: return c;
}
}
static char convertEscape(const char **in) {
char c = *++(*in);
switch (c) {
case 'u': {
// \u is a Unicode escape; 4 hex digits follow.
const char* digits = *in + 1;
*in += 4;
int uc = (digitToInt(digits[0]) << 12) | (digitToInt(digits[1]) << 8) |
(digitToInt(digits[2]) << 4) | (digitToInt(digits[3]));
if (uc > 127) {
// TODO: How/should we log unexpected characters?
}
return (char)uc;
}
case 'b': return '\b';
case 'n': return '\n';
case 'r': return '\r';
case 't': return '\t';
default: return c;
}
}
ChessBoard* ChessBoard_new(const char* fen){
ChessBoard* board = (ChessBoard*)malloc(sizeof(ChessBoard));
if(strcmp(fen, FEN_START)==0)
board->standard = 1;
else
board->standard = 0;
board->extra = malloc(sizeof(GameInfo));
GameInfo* info = (GameInfo*)board->extra;
info->capturedCount = 0;
info->movesCount = 0;
int i;
for(i=0; i<64; i++)
board->squares[i]=NULL;
info->pieceSets[(int)WHITE] = ChessPieceSet_new();
info->pieceSets[(int)BLACK] = ChessPieceSet_new();
board->hash = 0;
board->flags = 0;
board->fiftyMoveCount = 0;
//read FEN squares
ChessPiece* piece;
int rank=7, file=0;
for(i=0;(rank!=0) || (file!=8);i++){
if(isDigit(fen[i]))
file+=digitToInt(fen[i]);
else if(fen[i]=='/'){
assert(file==8);
rank--;
file = 0;
}
else{
assert((rank&7)==rank);
assert((file&7)==file);
piece = __newPieceFromChar(fen[i], RANK_FILE(rank,file));
__addPiece(board, piece);
file++;
}
}
assert(fen[i]==' ');
i++;
//read FEN to-play flag
if(fen[i]=='b'){
board->hash^=ZOBRIST_TABLE[ZOB_TO_PLAY];
board->flags^=TO_PLAY_FLAG;
}
else{ assert(fen[i]=='w'); }
i++;
assert(fen[i]==' ');
i++;
//read FEN castle flags
while(fen[i]!=' '){
switch(fen[i]){
case 'K':
board->hash^=ZOBRIST_TABLE[ZOB_WHITE_KING_CASTLE];
board->flags^=WHITE_KING_CASTLE_FLAG;
break;
case 'Q':
board->hash^=ZOBRIST_TABLE[ZOB_WHITE_QUEEN_CASTLE];
board->flags^=WHITE_QUEEN_CASTLE_FLAG;
break;
case 'k':
board->hash^=ZOBRIST_TABLE[ZOB_BLACK_KING_CASTLE];
board->flags^=BLACK_KING_CASTLE_FLAG;
break;
case 'q':
board->hash^=ZOBRIST_TABLE[ZOB_BLACK_QUEEN_CASTLE];
board->flags^=BLACK_QUEEN_CASTLE_FLAG;
break;
case '-':
break;
default:
assert(0);
}
i++;
}
assert(fen[i]==' ');
i++;
//read FEN en-passant flag
if(fen[i]!='-'){
i++; //skip the rank
assert(isDigit(fen[i]));
__setEnPassantFlags(board, digitToInt(fen[i]));
}
//TODO implement and capture other FEN flags
return board;
}
