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Check for division by/modulo by zero when parsing the /= and %= operators.

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git-svn-id: svn://svn.cc65.org/cc65/trunk@3937 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
uz 2009-02-17 21:09:59 +00:00
parent c4dac550a8
commit 4dd9c523e7
1 changed files with 15 additions and 7 deletions
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22
src/cc65/expr.c
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@ -1878,7 +1878,7 @@ static void hie_compare (const GenDesc* Ops, /* List of generators */
Error ("Incompatible types");
}
} else if (!ED_IsNullPtr (&Expr2)) {
Error ("Incompatible types");
Error ("Incompatible types");
}
}
@ -1931,7 +1931,7 @@ static void hie_compare (const GenDesc* Ops, /* List of generators */
if (rconst) {
flags |= CF_CONST;
if ((Gen->Flags & GEN_NOPUSH) != 0) {
RemoveCode (&Mark2);
RemoveCode (&Mark2);
ltype |= CF_REG; /* Value is in register */
}
}
@ -2090,7 +2090,7 @@ static void parseadd (ExprDesc* Expr)
*/
if (ED_IsLocAbs (Expr)) {
/* Numeric constant, scale lhs */
Expr->IVal *= ScaleFactor;
Expr->IVal *= ScaleFactor;
/* Generate the code for the add */
g_inc (flags, Expr->IVal);
} else if (ScaleFactor == 1) {
@ -2196,7 +2196,7 @@ static void parseadd (ExprDesc* Expr)
flags = typeadjust (Expr, &Expr2, 0) & ~CF_CONST;
} else {
/* OOPS */
Error ("Invalid operands for binary operator `+'");
Error ("Invalid operands for binary operator `+'");
flags = CF_INT;
}
@ -2302,7 +2302,7 @@ static void parsesub (ExprDesc* Expr)
} else {
rscale = CheckedPSizeOf (lhst);
}
/* Operate on pointers, result type is an integer */
/* Operate on pointers, result type is an integer */
flags = CF_PTR;
Expr->Type = type_int;
} else if (IsClassInt (lhst) && IsClassInt (rhst)) {
@ -2355,7 +2355,7 @@ static void parsesub (ExprDesc* Expr)
* longer true, lhs is on stack instead.
*/
if (ED_IsLocAbs (Expr)) {
ED_MakeRValExpr (Expr);
ED_MakeRValExpr (Expr);
}
/* Adjust operand types */
flags = typeadjust (Expr, &Expr2, 0);
@ -2842,7 +2842,15 @@ static void opeq (const GenDesc* Gen, ExprDesc* Expr)
g_inc (flags | CF_CONST, Expr2.IVal);
} else if (Gen->Func == g_sub) {
g_dec (flags | CF_CONST, Expr2.IVal);
} else {
} else {
if (Expr2.IVal == 0) {
/* Check for div by zero/mod by zero */
if (Gen->Func == g_div) {
Error ("Division by zero");
} else if (Gen->Func == g_mod) {
Error ("Modulo operation with zero");
}
}
Gen->Func (flags | CF_CONST, Expr2.IVal);
}
} else {