From: eck <none@none>
Date: Thu, 1 Mar 1990 16:32:22 +0000 (+0000)
Subject: fixed div() and ldiv()
X-Git-Tag: release-5-5~1795
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=11c9808d7ebd71ad15fecd63aba74187ce447edd;p=ack.git

fixed div() and ldiv()
---

diff --git a/lang/cem/libcc.ansi/stdlib/div.c b/lang/cem/libcc.ansi/stdlib/div.c
index bf27906f1..243079941 100644
--- a/lang/cem/libcc.ansi/stdlib/div.c
+++ b/lang/cem/libcc.ansi/stdlib/div.c
@@ -6,12 +6,26 @@
 
 #include	<stdlib.h>
 
+static int tmp = -1;
+
 div_t
 div(register int numer, register int denom)
 {
 	div_t r;
 
-	r.quot = numer / denom;
-	r.rem = numer % denom;
+	/* The assignment of tmp should not be optimized !! */
+	if (tmp == -1)
+		tmp = (tmp / 2 == 0);
+	}
+	if (numer == 0) {
+		r.quot = numer / denom;		/* might trap if denom == 0 */
+		r.rem = numer % denom;
+	} else if ( !tmp && ((numer < 0) != (denom < 0))) {
+		r.quot = (numer / denom) + 1;
+		r.rem = numer - (numer / denom + 1) * denom
+	} else {
+		r.quot = numer / denom;
+		r.rem = numer % denom;
+	}
 	return r;
 }
diff --git a/lang/cem/libcc.ansi/stdlib/ldiv.c b/lang/cem/libcc.ansi/stdlib/ldiv.c
index 77574648c..25b842cbe 100644
--- a/lang/cem/libcc.ansi/stdlib/ldiv.c
+++ b/lang/cem/libcc.ansi/stdlib/ldiv.c
@@ -6,12 +6,26 @@
 
 #include	<stdlib.h>
 
+static long tmp = -1;
+
 ldiv_t
 ldiv(register long numer, register long denom)
 {
 	ldiv_t r;
 
-	r.quot = numer / denom;
-	r.rem = numer % denom;
+	/* The assignment of tmp should not be optimized !! */
+	if (tmp == -1)
+		tmp = (tmp / 2 == 0);
+	}
+	if (numer == 0) {
+		r.quot = numer / denom;		/* might trap if denom == 0 */
+		r.rem = numer % denom;
+	} else if ( !tmp && ((numer < 0) != (denom < 0))) {
+		r.quot = (numer / denom) + 1;
+		r.rem = numer - (numer / denom + 1) * denom
+	} else {
+		r.quot = numer / denom;
+		r.rem = numer % denom;
+	}
 	return r;
 }