[PATCH 2/5] don't die immediately when convert an invalid type name

[Liu Yubao <yubao.liu@gmail.com>]

Signed-off-by: Liu Yubao <yubao.liu@gmail.com>
---
 object.c    |   14 +++++++++++++-
 object.h    |    1 +
 sha1_file.c |    2 +-
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/object.c b/object.c
index 50b6528..0a18db6 100644
--- a/object.c
+++ b/object.c
@@ -33,13 +33,25 @@ const char *typename(unsigned int type)
 	return object_type_strings[type];
 }
 
-int type_from_string(const char *str)
+int type_from_string_gently(const char *str)
 {
 	int i;
 
 	for (i = 1; i < ARRAY_SIZE(object_type_strings); i++)
 		if (!strcmp(str, object_type_strings[i]))
 			return i;
+
+	return -1;
+}
+
+int type_from_string(const char *str)
+{
+	int i;
+
+	i = type_from_string_gently(str);
+	if (i > 0)
+		return i;
+
 	die("invalid object type \"%s\"", str);
 }
 
diff --git a/object.h b/object.h
index d962ff1..88baf2b 100644
--- a/object.h
+++ b/object.h
@@ -36,6 +36,7 @@ struct object {
 };
 
 extern const char *typename(unsigned int type);
+extern int type_from_string_gently(const char *str);
 extern int type_from_string(const char *str);
 
 extern unsigned int get_max_object_index(void);
diff --git a/sha1_file.c b/sha1_file.c
index efe6967..dccc455 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -1291,7 +1291,7 @@ static int parse_sha1_header(const char *hdr, unsigned long length, unsigned lon
 	/*
 	 * The length must be followed by a zero byte
 	 */
-	return *hdr ? -1 : type_from_string(type);
+	return *hdr ? -1 : type_from_string_gently(type);
 }
 
 static void *unpack_sha1_file(void *map, unsigned long mapsize, enum object_type *type, unsigned long *size, const unsigned char *sha1)
-- 
1.6.1.rc1.5.gde86c