[PATCH 07/13] we need our own version of fast-import.c:fixup_header_footer()

[PATCH 07/13] we need our own version of fast-import.c:fixup_header_footer()

[Dana How]

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---
 builtin-pack-objects.c |   40 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 40 insertions(+), 0 deletions(-)

-- 
Dana L. How  danahow@gmail.com  +1 650 804 5991 cell

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From 3e8e1611653c28d1c3054152fb212a44fee24e2a Mon Sep 17 00:00:00 2001
From: Dana How <how@deathvalley.cswitch.com>
Date: Thu, 5 Apr 2007 13:54:58 -0700
Subject: [PATCH 07/13] we need our own version of fast-import.c:fixup_header_footer()

---
 builtin-pack-objects.c |   40 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 40 insertions(+), 0 deletions(-)

diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 0a9deb0..9eb5fd6 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -519,6 +519,46 @@ static off_t write_one(struct sha1file *f,
 	return offset + write_object(f, e);
 }
 
+/*
+ * Move this, the version in fast-import.c,
+ * and index_pack.c:readjust_pack_header_and_sha1 into sha1_file.c ?
+ */
+static void fixup_header_footer(int pack_fd, unsigned char *pack_file_sha1,
+				char *pack_name, uint32_t object_count)
+{
+	static const int buf_sz = 128 * 1024;
+	SHA_CTX c;
+	struct pack_header hdr;
+	char *buf;
+
+	if (lseek(pack_fd, 0, SEEK_SET) != 0)
+		die("Failed seeking to start: %s", strerror(errno));
+	if (read_in_full(pack_fd, &hdr, sizeof(hdr)) != sizeof(hdr))
+		die("Unable to reread header of %s", pack_name);
+	if (lseek(pack_fd, 0, SEEK_SET) != 0)
+		die("Failed seeking to start: %s", strerror(errno));
+	hdr.hdr_entries = htonl(object_count);
+	write_or_die(pack_fd, &hdr, sizeof(hdr));
+
+	SHA1_Init(&c);
+	SHA1_Update(&c, &hdr, sizeof(hdr));
+
+	buf = xmalloc(buf_sz);
+	for (;;) {
+		size_t n = xread(pack_fd, buf, buf_sz);
+		if (!n)
+			break;
+		if (n < 0)
+			die("Failed to checksum %s", pack_name);
+		SHA1_Update(&c, buf, n);
+	}
+	free(buf);
+
+	SHA1_Final(pack_file_sha1, &c);
+	write_or_die(pack_fd, pack_file_sha1, 20);
+	close(pack_fd);
+}
+
 typedef int (*entry_sort_t)(const struct object_entry *, const struct object_entry *);
 
 static entry_sort_t current_sort;
-- 
1.5.1.rc2.18.g9c88-dirty