check for invalid integer conversions

1 files changed, 6 insertions, 0 deletions

diff --git a/src/stdlib/ldiv.c b/src/stdlib/ldiv.c
index dc236d10..0b7f0167 100644
--- a/src/stdlib/ldiv.c
+++ b/src/stdlib/ldiv.c
@@ -1,3 +1,4 @@
+#include <limits.h>
 #include <stdlib.h>
 #include "_stdlib.h"
 
@@ -8,12 +9,17 @@ ldiv_t ldiv(long int numer, long int denom)
 	ldiv_t d;
 
 	SIGNAL_SAFE(0);
+	if ((denom == 0) || (numer == LONG_MIN && denom == -1)) {
+		UNDEFINED("In call to ldiv(): The result of %ld / %ld is not representable as a long int", numer, denom);
+	}
 
 	d.quot = numer / denom;
 	d.rem = numer % denom;
 	return d;
 }
 
+CHECK_2(ldiv_t, {0}, ldiv, long int, long int)
+
 /***
 computes both the quotient and remainder of ARGUMENT(numer)
 divided by ARGUMENT(denom).