object-file.c: use size_t for header lengths

Continue walking the code path for the >4GB `hash-object --literally`
test. The `hash_object_file_literally()` function internally uses both
`hash_object_file()` and `write_object_file_prepare()`. Both function
signatures use `unsigned long` rather than `size_t` for the mem buffer
sizes. Use `size_t` instead, for LLP64 compatibility.

While at it, convert those function's object's header buffer length to
`size_t` for consistency. The value is already upcast to `uintmax_t` for
print format compatibility.

Note: The hash-object test still does not pass. A subsequent commit
continues to walk the call tree's lower level hash functions to identify
further fixes.

Signed-off-by: Philip Oakley <[email protected]>
Signed-off-by: Johannes Schindelin <[email protected]>

Author: PhilipOakley

object-file.c

@@ -503,7 +503,7 @@ int loose_object_info(struct repository *r,
 static void hash_object_body(const struct git_hash_algo *algo, struct git_hash_ctx *c,
 			     const void *buf, unsigned long len,
 			     struct object_id *oid,
-			     char *hdr, int *hdrlen)
+			     char *hdr, size_t *hdrlen)
 {
 	algo->init_fn(c);
 	git_hash_update(c, hdr, *hdrlen);
@@ -512,9 +512,9 @@ static void hash_object_body(const struct git_hash_algo *algo, struct git_hash_c
 }
 
 static void write_object_file_prepare(const struct git_hash_algo *algo,
-				      const void *buf, unsigned long len,
+				      const void *buf, size_t len,
 				      enum object_type type, struct object_id *oid,
-				      char *hdr, int *hdrlen)
+				      char *hdr, size_t *hdrlen)
 {
 	struct git_hash_ctx c;
 
@@ -657,11 +657,11 @@ int finalize_object_file_flags(struct repository *repo,
 }
 
 void hash_object_file(const struct git_hash_algo *algo, const void *buf,
-		      unsigned long len, enum object_type type,
+		      size_t len, enum object_type type,
 		      struct object_id *oid)
 {
 	char hdr[MAX_HEADER_LEN];
-	int hdrlen = sizeof(hdr);
+	size_t hdrlen = sizeof(hdr);
 
 	write_object_file_prepare(algo, buf, len, type, oid, hdr, &hdrlen);
 }
@@ -1037,15 +1037,15 @@ int stream_loose_object(struct odb_source *source,
 }
 
 int write_object_file(struct odb_source *source,
-		      const void *buf, unsigned long len,
+		      const void *buf, size_t len,
 		      enum object_type type, struct object_id *oid,
 		      struct object_id *compat_oid_in, unsigned flags)
 {
 	const struct git_hash_algo *algo = source->odb->repo->hash_algo;
 	const struct git_hash_algo *compat = source->odb->repo->compat_hash_algo;
 	struct object_id compat_oid;
 	char hdr[MAX_HEADER_LEN];
-	int hdrlen = sizeof(hdr);
+	size_t hdrlen = sizeof(hdr);
 
 	/* Generate compat_oid */
 	if (compat) {

object-file.h

@@ -147,7 +147,7 @@ struct object_info;
 int parse_loose_header(const char *hdr, struct object_info *oi);
 
 int write_object_file(struct odb_source *source,
-		      const void *buf, unsigned long len,
+		      const void *buf, size_t len,
 		      enum object_type type, struct object_id *oid,
 		      struct object_id *compat_oid_in, unsigned flags);
 
@@ -197,7 +197,7 @@ int finalize_object_file_flags(struct repository *repo,
 			       enum finalize_object_file_flags flags);
 
 void hash_object_file(const struct git_hash_algo *algo, const void *buf,
-		      unsigned long len, enum object_type type,
+		      size_t len, enum object_type type,
 		      struct object_id *oid);
 
 /* Helper to check and "touch" a file */