From 7dbd418af7760187863af0bcbef5e80c4a2ec95b Mon Sep 17 00:00:00 2001 From: Markus Uhlin Date: Tue, 26 Dec 2023 17:23:14 +0100 Subject: Reformatted CheckFormula() --- FICS/formula.c | 89 +++++++++++++++++++++++++++++++++------------------------- 1 file changed, 51 insertions(+), 38 deletions(-) (limited to 'FICS/formula.c') diff --git a/FICS/formula.c b/FICS/formula.c index 4839f0f..24aa923 100644 --- a/FICS/formula.c +++ b/FICS/formula.c @@ -398,46 +398,59 @@ int ScanForNumber (game *g, int clause, int *i, int op_type, } } /* end of function ScanForNumber. */ -/* If eval is 1, CheckFormula looks for the next token in the - formula given by *g, clause, and *i; usually this is the right - side of an expression whose operator has precedence OpType; if - eval is 0, just go to the end of an expression. Return 0 if no - error; otherwise, return error type. -*/ -int CheckFormula (game *g, int clause, int *i, int op_type, - int *result, int eval) +/* + * If 'eval' is 1, CheckFormula() looks for the next token in the + * formula given by 'g', 'clause' and 'i'. Usually this is the right + * side of an expression whose operator has precedence OpType(). If + * 'eval' is 0, just go to the end of an expression. + */ +int +CheckFormula(game *g, int clause, int *i, int op_type, int *result, int eval) { - int token, ret, nextOp, lastPos; - char *string = GetPlayersFormula (&parray[g->black], clause); + char *string = GetPlayersFormula(&parray[g->black], clause); + int token, ret, nextOp, lastPos; - if (string == NULL) - { - *result = 1; - return (ERR_NONE); - } - ret = ScanForNumber (g, clause, i, op_type, &token, eval); - if (ret != ERR_NONE) - return (ret); - lastPos = *i; - nextOp = ScanForOp (string, i); - while (OpType(nextOp) > op_type) /* higher precedence. */ - { - if (nextOp==OP_RTPAREN) return (ERR_PAREN); - if (!eval) - ret = CheckFormula(g, clause, i, OpType(nextOp), &token, 0); - else ret = EvalBinaryOp (&token, nextOp, g, clause, i); - if (ret != ERR_NONE) return (ret); - lastPos = *i; - nextOp = ScanForOp (string, i); - } - if (nextOp == OP_BAD) return(ERR_BADOP); - *result = token; - - /* move back unless we're at the end or at a right paren, in which - case we never went forward. */ - if (nextOp != OP_NONE && nextOp != OP_RTPAREN) *i=lastPos; - return (ERR_NONE); -} /* end of function CheckFormula. */ + if (string == NULL) { + *result = 1; + return ERR_NONE; + } + + ret = ScanForNumber(g, clause, i, op_type, &token, eval); + + if (ret != ERR_NONE) + return ret; + + lastPos = *i; + nextOp = ScanForOp(string, i); + + while (OpType(nextOp) > op_type) { /* Higher precedence. */ + if (nextOp == OP_RTPAREN) + return ERR_PAREN; + if (!eval) { + ret = CheckFormula(g, clause, i, OpType(nextOp), + &token, 0); + } else { + ret = EvalBinaryOp(&token, nextOp, g, clause, + i); + } + + if (ret != ERR_NONE) + return ret; + lastPos = *i; + nextOp = ScanForOp(string, i); + } + + if (nextOp == OP_BAD) + return ERR_BADOP; + *result = token; + /* + * Move back unless we're at the end or at a right paren, in + * which case we never went forward. + */ + if (nextOp != OP_NONE && nextOp != OP_RTPAREN) + *i = lastPos; + return ERR_NONE; +} /* * Which clauses are relevant for a player's formula. -- cgit v1.2.3