thodg/libgit2

diff --git a/src/commit.c b/src/commit.c
index 05f7573..fc48487 100644
--- a/src/commit.c
+++ b/src/commit.c
@@ -191,14 +191,14 @@ int commit_parse_buffer(git_commit *commit, const void *data, size_t len)
 
 	git_vector_init(&commit->parent_oids, 4, NULL);
 
-	if ((error = git__parse_oid(&commit->tree_oid, &buffer, buffer_end, "tree ")) < GIT_SUCCESS)
+	if ((error = git_oid__parse(&commit->tree_oid, &buffer, buffer_end, "tree ")) < GIT_SUCCESS)
 		return git__rethrow(error, "Failed to parse buffer");
 
 	/*
 	 * TODO: commit grafts!
 	 */
 
-	while (git__parse_oid(&parent_oid, &buffer, buffer_end, "parent ") == GIT_SUCCESS) {
+	while (git_oid__parse(&parent_oid, &buffer, buffer_end, "parent ") == GIT_SUCCESS) {
 		git_oid *new_oid;
 
 		new_oid = git__malloc(sizeof(git_oid));
diff --git a/src/oid.c b/src/oid.c
index 8274cb5..f12ba30 100644
--- a/src/oid.c
+++ b/src/oid.c
@@ -136,7 +136,7 @@ char *git_oid_to_string(char *out, size_t n, const git_oid *oid)
 	return out;
 }
 
-int git__parse_oid(git_oid *oid, const char **buffer_out,
+int git_oid__parse(git_oid *oid, const char **buffer_out,
 		const char *buffer_end, const char *header)
 {
 	const size_t sha_len = GIT_OID_HEXSZ;
@@ -161,20 +161,6 @@ int git__parse_oid(git_oid *oid, const char **buffer_out,
 	return GIT_SUCCESS;
 }
 
-int git__write_oid(git_odb_stream *stream, const char *header, const git_oid *oid)
-{
-	char hex_oid[42];
-
-	git_oid_fmt(hex_oid + 1, oid);
-
-	hex_oid[0] = ' ';
-	hex_oid[41] = '\n';
-
-	stream->write(stream, header, strlen(header));
-	stream->write(stream, hex_oid, 42);
-	return GIT_SUCCESS;
-}
-
 void git_oid__writebuf(git_buf *buf, const char *header, const git_oid *oid)
 {
 	char hex_oid[GIT_OID_HEXSZ];
diff --git a/src/reflog.c b/src/reflog.c
index 63c4c50..df01199 100644
--- a/src/reflog.c
+++ b/src/reflog.c
@@ -59,8 +59,8 @@ static int reflog_write(git_repository *repo, const char *ref_name,
 {
 	int error;
 	char log_path[GIT_PATH_MAX];
-	char *sig = NULL;
-	git_filebuf log;
+	git_buf log = GIT_BUF_INIT;
+	git_filebuf fbuf;
 
 	assert(repo && ref_name && oid_old && oid_new && committer);
 
@@ -73,38 +73,33 @@ static int reflog_write(git_repository *repo, const char *ref_name,
 	} else if (git_futils_isfile(log_path))
 		return git__throw(GIT_ERROR, "Failed to write reflog. `%s` is directory", log_path);
 
-	if ((error = git_filebuf_open(&log, log_path, GIT_FILEBUF_APPEND)) < GIT_SUCCESS)
-		return git__throw(GIT_ERROR, "Failed to write reflog. Cannot open reflog `%s`", log_path);
-
-	if ((error = git_signature__write(&sig, NULL, committer)) < GIT_SUCCESS)
-		goto cleanup;
-
-	sig[strlen(sig)-1] = '\0'; /* drop LF */
+	git_buf_puts(&log, oid_old);
+	git_buf_puts(&log, oid_new);
 
-	if ((error = git_filebuf_printf(&log, "%s %s %s", oid_old, oid_new, sig)) < GIT_SUCCESS)
-		goto cleanup;
+	git_signature__writebuf(&log, NULL, committer);
+	log.size--; /* drop LF */
 
 	if (msg) {
 		if (strchr(msg, '\n')) {
-			error = git__throw(GIT_ERROR, "msg must not contain newline");
-			goto cleanup;
+			git_buf_free(&log);
+			return git__throw(GIT_ERROR, "Reflog message cannot contain newline");
 		}
 
-		if ((error = git_filebuf_printf(&log, "\t%s", msg)) < GIT_SUCCESS)
-			goto cleanup;
+		git_buf_putc(&log, '\t');
+		git_buf_puts(&log, msg);
 	}
 
-	error = git_filebuf_printf(&log, "\n");
+	git_buf_putc(&log, '\n');
 
-cleanup:
-	if (error < GIT_SUCCESS)
-		git_filebuf_cleanup(&log);
-	else
-		error = git_filebuf_commit(&log);
+	if ((error = git_filebuf_open(&fbuf, log_path, GIT_FILEBUF_APPEND)) < GIT_SUCCESS) {
+		git_buf_free(&log);
+		return git__throw(GIT_ERROR, "Failed to write reflog. Cannot open reflog `%s`", log_path);
+	}
 
-	if (sig)
-		free(sig);
+	git_filebuf_write(&fbuf, log.ptr, log.size);
+	error = git_filebuf_commit(&fbuf);
 
+	git_buf_free(&log);
 	return error == GIT_SUCCESS ? GIT_SUCCESS : git__rethrow(error, "Failed to write reflog");
 }
 
diff --git a/src/repository.h b/src/repository.h
index 1cf4261..2e0b9e3 100644
--- a/src/repository.h
+++ b/src/repository.h
@@ -43,8 +43,7 @@ struct git_repository {
  * export */
 void git_object__free(void *object);
 
-int git__parse_oid(git_oid *oid, const char **buffer_out, const char *buffer_end, const char *header);
-int git__write_oid(git_odb_stream *src, const char *header, const git_oid *oid);
+int git_oid__parse(git_oid *oid, const char **buffer_out, const char *buffer_end, const char *header);
 void git_oid__writebuf(git_buf *buf, const char *header, const git_oid *oid);
 
 #endif
diff --git a/src/signature.c b/src/signature.c
index be9ed1c..d7c1b2d 100644
--- a/src/signature.c
+++ b/src/signature.c
@@ -314,34 +314,6 @@ clean_exit:
 	return GIT_SUCCESS;
 }
 
-int git_signature__write(char **signature, const char *header, const git_signature *sig)
-{
-	int offset, hours, mins;
-	char sig_buffer[2048];
-	int sig_buffer_len;
-	char sign;
-
-	offset = sig->when.offset;
-	sign = (sig->when.offset < 0) ? '-' : '+';
-
-	if (offset < 0)
-		offset = -offset;
-
-	hours = offset / 60;
-	mins = offset % 60;
-
-	sig_buffer_len = snprintf(sig_buffer, sizeof(sig_buffer),
-			"%s%s <%s> %u %c%02d%02d\n",
-			header ? header : "", sig->name, sig->email,
-			(unsigned)sig->when.time, sign, hours, mins);
-
-	if (sig_buffer_len < 0 || (size_t)sig_buffer_len > sizeof(sig_buffer))
-		return GIT_ENOMEM;
-
-	*signature = git__strdup(sig_buffer);
-	return sig_buffer_len;
-}
-
 void git_signature__writebuf(git_buf *buf, const char *header, const git_signature *sig)
 {
 	int offset, hours, mins;
diff --git a/src/signature.h b/src/signature.h
index 41bc258..c2e7e78 100644
--- a/src/signature.h
+++ b/src/signature.h
@@ -7,7 +7,6 @@
 #include <time.h>
 
 int git_signature__parse(git_signature *sig, const char **buffer_out, const char *buffer_end, const char *header);
-int git_signature__write(char **signature, const char *header, const git_signature *sig);
 void git_signature__writebuf(git_buf *buf, const char *header, const git_signature *sig);
 
 #endif
diff --git a/src/tag.c b/src/tag.c
index 1292901..92b30ba 100644
--- a/src/tag.c
+++ b/src/tag.c
@@ -89,7 +89,7 @@ static int parse_tag_buffer(git_tag *tag, const char *buffer, const char *buffer
 	char *search;
 	int error;
 
-	if ((error = git__parse_oid(&tag->target, &buffer, buffer_end, "object ")) < 0)
+	if ((error = git_oid__parse(&tag->target, &buffer, buffer_end, "object ")) < 0)
 		return git__rethrow(error, "Failed to parse tag. Object field invalid");
 
 	if (buffer + 5 >= buffer_end)
diff --git a/src/util.h b/src/util.h
index e649070..e78b2cd 100644
--- a/src/util.h
+++ b/src/util.h
@@ -95,8 +95,6 @@ extern void git__strtolower(char *str);
 
 #define STRLEN(str) (sizeof(str) - 1)
 
-#define GIT_OID_LINE_LENGTH(header) (STRLEN(header) + 1 + GIT_OID_HEXSZ + 1)
-
 extern int git__fnmatch(const char *pattern, const char *name, int flags);
 
 /*
diff --git a/tests/t04-commit.c b/tests/t04-commit.c
index 0f480e5..a0d24da 100644
--- a/tests/t04-commit.c
+++ b/tests/t04-commit.c
@@ -117,14 +117,14 @@ BEGIN_TEST(parse0, "parse the OID line in a commit")
 	const char *ptr = string;\
 	const char *ptr_original = ptr;\
 	size_t len = strlen(ptr);\
-	must_pass(git__parse_oid(&oid, &ptr, ptr + len, header));\
+	must_pass(git_oid__parse(&oid, &ptr, ptr + len, header));\
 	must_be_true(ptr == ptr_original + len);\
 }
 
 #define TEST_OID_FAIL(string, header) { \
 	const char *ptr = string;\
 	size_t len = strlen(ptr);\
-	must_fail(git__parse_oid(&oid, &ptr, ptr + len, header));\
+	must_fail(git_oid__parse(&oid, &ptr, ptr + len, header));\
 }
 
 	TEST_OID_PASS("parent 05452d6349abcd67aa396dfb28660d765d8b2a36\n", "parent ");