From e191c804b86c9d7fccd8f6af8840baeb581c99f9 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Thu, 9 May 2013 12:05:19 +0200
Subject: [PATCH] add isl_aff_scale_val

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 doc/user.pod      |  2 ++
 include/isl/aff.h |  2 ++
 isl_aff.c         | 28 ++++++++++++++++++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/doc/user.pod b/doc/user.pod
index 40a5393..86fbe7e 100644
--- a/doc/user.pod
+++ b/doc/user.pod
@@ -3787,6 +3787,8 @@ Operations include
 		__isl_take isl_pw_aff *pwaff, isl_int mod);
 	__isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff,
 		isl_int f);
+	__isl_give isl_aff *isl_aff_scale_val(__isl_take isl_aff *aff,
+		__isl_take isl_val *v);
 	__isl_give isl_pw_aff *isl_pw_aff_scale(
 		__isl_take isl_pw_aff *pwaff, isl_int f);
 	__isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff,
diff --git a/include/isl/aff.h b/include/isl/aff.h
index f15ee66..115c85f 100644
--- a/include/isl/aff.h
+++ b/include/isl/aff.h
@@ -96,6 +96,8 @@ __isl_give isl_aff *isl_aff_sub(__isl_take isl_aff *aff1,
 	__isl_take isl_aff *aff2);
 
 __isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff, isl_int f);
+__isl_give isl_aff *isl_aff_scale_val(__isl_take isl_aff *aff,
+	__isl_take isl_val *v);
 __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f);
 __isl_give isl_aff *isl_aff_scale_down_ui(__isl_take isl_aff *aff, unsigned f);
 
diff --git a/isl_aff.c b/isl_aff.c
index 45fa93e..b7dc28a 100644
--- a/isl_aff.c
+++ b/isl_aff.c
@@ -1516,6 +1516,34 @@ __isl_give isl_aff *isl_aff_scale(__isl_take isl_aff *aff, isl_int f)
 	return aff;
 }
 
+/* Multiple "aff" by "v".
+ */
+__isl_give isl_aff *isl_aff_scale_val(__isl_take isl_aff *aff,
+	__isl_take isl_val *v)
+{
+	if (!aff || !v)
+		goto error;
+
+	if (isl_val_is_one(v)) {
+		isl_val_free(v);
+		return aff;
+	}
+
+	if (!isl_val_is_rat(v))
+		isl_die(isl_aff_get_ctx(aff), isl_error_invalid,
+			"expecting rational factor", goto error);
+
+	aff = isl_aff_scale(aff, v->n);
+	aff = isl_aff_scale_down(aff, v->d);
+
+	isl_val_free(v);
+	return aff;
+error:
+	isl_aff_free(aff);
+	isl_val_free(v);
+	return NULL;
+}
+
 __isl_give isl_aff *isl_aff_scale_down(__isl_take isl_aff *aff, isl_int f)
 {
 	isl_int gcd;
-- 
2.7.4