From ec71aa2e1f229b90092e6678ac7c2dca3d15b5f3 Mon Sep 17 00:00:00 2001
From: Jonathan Nieder <jrnieder@gmail.com>
Date: Wed, 13 Oct 2010 04:39:44 -0500
Subject: vcs-svn: implement copyfrom_data delta instruction

The copyfrom_data instruction copies a few bytes verbatim from the
novel text section of a window to the postimage.

[jn: with memory leak fix from David]

Improved-by: David Barr <david.barr@cordelta.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Acked-by: Ramkumar Ramachandra <artagnon@gmail.com>
---
 t/t9011-svn-da.sh | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 't')

diff --git a/t/t9011-svn-da.sh b/t/t9011-svn-da.sh
index d9acd0c8a6..ba8ce052aa 100755
--- a/t/t9011-svn-da.sh
+++ b/t/t9011-svn-da.sh
@@ -138,4 +138,35 @@ test_expect_success 'reject truncated inline data (after instruction section)' '
 	test_must_fail test-svn-fe -d preimage insn.trunc 11
 '
 
+test_expect_success 'copyfrom_data' '
+	echo hi >expect &&
+	printf "SVNQ%b%b%b" "QQ\003\001\003" "\0203" "hi\n" | q_to_nul >copydat &&
+	test-svn-fe -d preimage copydat 13 >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'multiple copyfrom_data' '
+	echo hi >expect &&
+	printf "SVNQ%b%b%b%b%b" "QQ\003\002\003" "\0201\0202" "hi\n" \
+		"QQQ\002Q" "\0200Q" | q_to_nul >copy.multi &&
+	len=$(wc -c <copy.multi) &&
+	test-svn-fe -d preimage copy.multi $len >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'incomplete multiple insn' '
+	printf "SVNQ%b%b%b" "QQ\003\002\003" "\0203\0200" "hi\n" |
+		q_to_nul >copy.partial &&
+	len=$(wc -c <copy.partial) &&
+	test_must_fail test-svn-fe -d preimage copy.partial $len
+'
+
+test_expect_success 'catch attempt to copy missing data' '
+	printf "SVNQ%b%b%s%b%s" "QQ\002\002\001" "\0201\0201" "X" \
+			"QQQQ\002" "YZ" |
+		q_to_nul >copy.incomplete &&
+	len=$(wc -c <copy.incomplete) &&
+	test_must_fail test-svn-fe -d preimage copy.incomplete $len
+'
+
 test_done
-- 
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