convert object type handling from a string to a number

We currently have two parallel notation for dealing with object types
in the code: a string and a numerical value.  One of them is obviously
redundent, and the most used one requires more stack space and a bunch
of strcmp() all over the place.

This is an initial step for the removal of the version using a char array
found in object reading code paths.  The patch is unfortunately large but
there is no sane way to split it in smaller parts without breaking the
system.

Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>

1 files changed, 5 insertions, 4 deletions

diff --git a/mktree.c b/mktree.c
index 56205d1e00..d86dde89d6 100644
--- a/mktree.c
+++ b/mktree.c
@@ -95,7 +95,7 @@ int main(int ac, char **av)
 		int len;
 		char *ptr, *ntr;
 		unsigned mode;
-		char type[20];
+		enum object_type type;
 		char *path;
 
 		read_line(&sb, stdin, line_termination);
@@ -115,11 +115,12 @@ int main(int ac, char **av)
 		    ntr[41] != '\t' ||
 		    get_sha1_hex(ntr + 1, sha1))
 			die("input format error: %s", sb.buf);
-		if (sha1_object_info(sha1, type, NULL))
+		type = sha1_object_info(sha1, NULL);
+		if (type < 0)
 			die("object %s unavailable", sha1_to_hex(sha1));
 		*ntr++ = 0; /* now at the beginning of SHA1 */
-		if (strcmp(ptr, type))
-			die("object type %s mismatch (%s)", ptr, type);
+		if (type != type_from_string(ptr))
+			die("object type %s mismatch (%s)", ptr, typename(type));
 		ntr += 41; /* at the beginning of name */
 		if (line_termination && ntr[0] == '"')
 			path = unquote_c_style(ntr, NULL);