[PATCH v2 01/10] object.c: stop supporting len == -1 in type_from_string_gently()

[Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>]

Change the type_from_string() macro into a function and drop the
support for passing len < 0.

Support for len < 0 was added in fe8e3b71805 (Refactor
type_from_string() to allow continuing after detecting an error,
2014-09-10), but no callers use that form. Let's drop it to simplify
this, and in preparation for simplifying these even further.

Even though the argument was changed from ssize_t to the unsigned
size_t C is by design forgiving about passing -1 as an unsigned
type (it's just an alias for "set all bits)", let's detect any
outstanding in-flight callers passing a -1.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 object.c | 13 ++++++++++---
 object.h |  4 ++--
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/object.c b/object.c
index bad9e17f25..aae2a27e55 100644
--- a/object.c
+++ b/object.c
@@ -35,12 +35,12 @@ const char *type_name(unsigned int type)
 	return object_type_strings[type];
 }
 
-int type_from_string_gently(const char *str, ssize_t len, int gentle)
+int type_from_string_gently(const char *str, size_t len, int gentle)
 {
 	int i;
 
-	if (len < 0)
-		len = strlen(str);
+	if (len == ~(size_t)0)
+		BUG("type-from-string-gently no longer allows unspecified length");
 
 	for (i = 1; i < ARRAY_SIZE(object_type_strings); i++)
 		if (!strncmp(str, object_type_strings[i], len) &&
@@ -53,6 +53,13 @@ int type_from_string_gently(const char *str, ssize_t len, int gentle)
 	die(_("invalid object type \"%.*s\""), (int)len, str);
 }
 
+int type_from_string(const char *str)
+{
+	size_t len = strlen(str);
+	int ret = type_from_string_gently(str, len, 0);
+	return ret;
+}
+
 /*
  * Return a numerical hash value between 0 and n-1 for the object with
  * the specified sha1.  n must be a power of 2.  Please note that the
diff --git a/object.h b/object.h
index 59daadce21..f9d8f4d22b 100644
--- a/object.h
+++ b/object.h
@@ -93,8 +93,8 @@ struct object {
 };
 
 const char *type_name(unsigned int type);
-int type_from_string_gently(const char *str, ssize_t, int gentle);
-#define type_from_string(str) type_from_string_gently(str, -1, 0)
+int type_from_string_gently(const char *str, size_t, int gentle);
+int type_from_string(const char *str);
 
 /*
  * Return the current number of buckets in the object hashmap.
-- 
2.31.1.723.ga5d7868e4a