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From: Lukas Czerner <lczerner@redhat.com>
To: xfs@oss.sgi.com
Cc: Lukas Czerner <lczerner@redhat.com>, aelder@sgi.com
Subject: [PATCH 1/2 v3] commit.rc: Add helper for math operation using bc
Date: Fri, 23 Sep 2011 16:15:10 +0200	[thread overview]
Message-ID: <1316787311-23428-1-git-send-email-lczerner@redhat.com> (raw)

Sometimes using bash $(()) math might not be enough due to some
limitation (big numbers), so add helper using 'bc' program. For
now the results are only in perfect numbers (as in bash) since this is
all I need for now.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
---
v3: Nothing has changed

 common.rc |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/common.rc b/common.rc
index 35f782b..b0e0c6a 100644
--- a/common.rc
+++ b/common.rc
@@ -20,6 +20,20 @@
 #  Mountain View, CA 94043, USA, or: http://www.sgi.com
 #-----------------------------------------------------------------------
 
+BC=$(which bc 2> /dev/null) || BC=
+
+_math() {
+	if [ $# -le 0 ]; then
+		return
+	fi
+	if [ "$BC" ]; then
+		result=$(LANG=C echo "scale=0; $@" | "$BC" -q 2> /dev/null)
+	else
+		result=$(($@))
+	fi
+	echo "$result"
+}
+
 dd()
 {
    if [ "$HOSTOS" == "Linux" ]
-- 
1.7.4.4

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             reply	other threads:[~2011-09-23 14:15 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-23 14:15 Lukas Czerner [this message]
2011-09-23 14:15 ` [PATCH 2/2] Add test 257: Check proper FITRIM argument handling Lukas Czerner
2011-09-23 15:00   ` Alex Elder
2011-09-23 16:06     ` Lukas Czerner
2011-09-23 23:04   ` Michael Monnerie
2011-09-26  6:15     ` Lukas Czerner
2011-09-26  7:14   ` [PATCH] " Lukas Czerner
2011-09-26 11:42     ` Lukas Czerner
2011-09-26 12:47     ` Alex Elder
2011-09-26 13:52       ` Lukas Czerner
2011-09-26 15:47         ` Alex Elder
2011-09-23 15:00 ` [PATCH 1/2 v3] commit.rc: Add helper for math operation using bc Alex Elder
2011-09-26 18:45 ` [PATCH v4] " Lukas Czerner
2011-09-26 21:32   ` Alex Elder

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