pack: move find_pack_entry_one(), is_pack_valid()

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

4 files changed, 82 insertions, 84 deletions

diff --git a/cache.h b/cache.h
index 1a8b22779a..c13345d641 100644
--- a/cache.h
+++ b/cache.h
@@ -1621,14 +1621,6 @@ extern int odb_mkstemp(struct strbuf *template, const char *pattern);
 extern int odb_pack_keep(const char *name);
 
 /*
- * If the object named sha1 is present in the specified packfile,
- * return its offset within the packfile; otherwise, return 0.
- */
-extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
-
-extern int is_pack_valid(struct packed_git *);
-
-/*
  * Iterate over the files in the loose-object parts of the object
  * directory "path", triggering the following callbacks:
  *
diff --git a/packfile.c b/packfile.c
index f251e38783..20562304b7 100644
--- a/packfile.c
+++ b/packfile.c
@@ -7,6 +7,7 @@
 #include "delta.h"
 #include "list.h"
 #include "streaming.h"
+#include "sha1-lookup.h"
 
 char *odb_pack_name(struct strbuf *buf,
 		    const unsigned char *sha1,
@@ -509,7 +510,7 @@ static int open_packed_git_1(struct packed_git *p)
 	return 0;
 }
 
-int open_packed_git(struct packed_git *p)
+static int open_packed_git(struct packed_git *p)
 {
 	if (!open_packed_git_1(p))
 		return 0;
@@ -1700,3 +1701,76 @@ off_t nth_packed_object_offset(const struct packed_git *p, uint32_t n)
 				   ntohl(*((uint32_t *)(index + 4)));
 	}
 }
+
+off_t find_pack_entry_one(const unsigned char *sha1,
+				  struct packed_git *p)
+{
+	const uint32_t *level1_ofs = p->index_data;
+	const unsigned char *index = p->index_data;
+	unsigned hi, lo, stride;
+	static int debug_lookup = -1;
+
+	if (debug_lookup < 0)
+		debug_lookup = !!getenv("GIT_DEBUG_LOOKUP");
+
+	if (!index) {
+		if (open_pack_index(p))
+			return 0;
+		level1_ofs = p->index_data;
+		index = p->index_data;
+	}
+	if (p->index_version > 1) {
+		level1_ofs += 2;
+		index += 8;
+	}
+	index += 4 * 256;
+	hi = ntohl(level1_ofs[*sha1]);
+	lo = ((*sha1 == 0x0) ? 0 : ntohl(level1_ofs[*sha1 - 1]));
+	if (p->index_version > 1) {
+		stride = 20;
+	} else {
+		stride = 24;
+		index += 4;
+	}
+
+	if (debug_lookup)
+		printf("%02x%02x%02x... lo %u hi %u nr %"PRIu32"\n",
+		       sha1[0], sha1[1], sha1[2], lo, hi, p->num_objects);
+
+	while (lo < hi) {
+		unsigned mi = (lo + hi) / 2;
+		int cmp = hashcmp(index + mi * stride, sha1);
+
+		if (debug_lookup)
+			printf("lo %u hi %u rg %u mi %u\n",
+			       lo, hi, hi - lo, mi);
+		if (!cmp)
+			return nth_packed_object_offset(p, mi);
+		if (cmp > 0)
+			hi = mi;
+		else
+			lo = mi+1;
+	}
+	return 0;
+}
+
+int is_pack_valid(struct packed_git *p)
+{
+	/* An already open pack is known to be valid. */
+	if (p->pack_fd != -1)
+		return 1;
+
+	/* If the pack has one window completely covering the
+	 * file size, the pack is known to be valid even if
+	 * the descriptor is not currently open.
+	 */
+	if (p->windows) {
+		struct pack_window *w = p->windows;
+
+		if (!w->offset && w->len == p->pack_size)
+			return 1;
+	}
+
+	/* Force the pack to open to prove its valid. */
+	return !open_packed_git(p);
+}
diff --git a/packfile.h b/packfile.h
index f4f5b936fc..4ab15116c0 100644
--- a/packfile.h
+++ b/packfile.h
@@ -93,6 +93,13 @@ extern const struct object_id *nth_packed_object_oid(struct object_id *, struct
  */
 extern off_t nth_packed_object_offset(const struct packed_git *, uint32_t n);
 
+/*
+ * If the object named sha1 is present in the specified packfile,
+ * return its offset within the packfile; otherwise, return 0.
+ */
+extern off_t find_pack_entry_one(const unsigned char *sha1, struct packed_git *);
+
+extern int is_pack_valid(struct packed_git *);
 extern void *unpack_entry(struct packed_git *, off_t, enum object_type *, unsigned long *);
 extern unsigned long unpack_object_header_buffer(const unsigned char *buf, unsigned long len, enum object_type *type, unsigned long *sizep);
 extern unsigned long get_size_from_delta(struct packed_git *, struct pack_window **, off_t);
@@ -100,8 +107,6 @@ extern int unpack_object_header(struct packed_git *, struct pack_window **, off_
 
 extern void release_pack_memory(size_t);
 
-extern int open_packed_git(struct packed_git *p);
-
 /* global flag to enable extra checks when accessing packed objects */
 extern int do_check_packed_object_crc;
 
diff --git a/sha1_file.c b/sha1_file.c
index 52e9292ff2..365b4af367 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1075,79 +1075,6 @@ int parse_sha1_header(const char *hdr, unsigned long *sizep)
 	return parse_sha1_header_extended(hdr, &oi, 0);
 }
 
-off_t find_pack_entry_one(const unsigned char *sha1,
-				  struct packed_git *p)
-{
-	const uint32_t *level1_ofs = p->index_data;
-	const unsigned char *index = p->index_data;
-	unsigned hi, lo, stride;
-	static int debug_lookup = -1;
-
-	if (debug_lookup < 0)
-		debug_lookup = !!getenv("GIT_DEBUG_LOOKUP");
-
-	if (!index) {
-		if (open_pack_index(p))
-			return 0;
-		level1_ofs = p->index_data;
-		index = p->index_data;
-	}
-	if (p->index_version > 1) {
-		level1_ofs += 2;
-		index += 8;
-	}
-	index += 4 * 256;
-	hi = ntohl(level1_ofs[*sha1]);
-	lo = ((*sha1 == 0x0) ? 0 : ntohl(level1_ofs[*sha1 - 1]));
-	if (p->index_version > 1) {
-		stride = 20;
-	} else {
-		stride = 24;
-		index += 4;
-	}
-
-	if (debug_lookup)
-		printf("%02x%02x%02x... lo %u hi %u nr %"PRIu32"\n",
-		       sha1[0], sha1[1], sha1[2], lo, hi, p->num_objects);
-
-	while (lo < hi) {
-		unsigned mi = (lo + hi) / 2;
-		int cmp = hashcmp(index + mi * stride, sha1);
-
-		if (debug_lookup)
-			printf("lo %u hi %u rg %u mi %u\n",
-			       lo, hi, hi - lo, mi);
-		if (!cmp)
-			return nth_packed_object_offset(p, mi);
-		if (cmp > 0)
-			hi = mi;
-		else
-			lo = mi+1;
-	}
-	return 0;
-}
-
-int is_pack_valid(struct packed_git *p)
-{
-	/* An already open pack is known to be valid. */
-	if (p->pack_fd != -1)
-		return 1;
-
-	/* If the pack has one window completely covering the
-	 * file size, the pack is known to be valid even if
-	 * the descriptor is not currently open.
-	 */
-	if (p->windows) {
-		struct pack_window *w = p->windows;
-
-		if (!w->offset && w->len == p->pack_size)
-			return 1;
-	}
-
-	/* Force the pack to open to prove its valid. */
-	return !open_packed_git(p);
-}
-
 static int fill_pack_entry(const unsigned char *sha1,
 			   struct pack_entry *e,
 			   struct packed_git *p)