errors: Rename the generic return codes

21 files changed, 173 insertions, 137 deletions

diff --git a/include/git2/blob.h b/include/git2/blob.h
index afa350bb1..551770678 100644
--- a/include/git2/blob.h
+++ b/include/git2/blob.h
@@ -27,7 +27,7 @@ GIT_BEGIN_DECL
  * @param blob pointer to the looked up blob
  * @param repo the repo to use when locating the blob.
  * @param id identity of the blob to locate.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_blob_lookup(git_blob **blob, git_repository *repo, const git_oid *id)
 {
@@ -44,7 +44,7 @@ GIT_INLINE(int) git_blob_lookup(git_blob **blob, git_repository *repo, const git
  * @param repo the repo to use when locating the blob.
  * @param id identity of the blob to locate.
  * @param len the length of the short identifier
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_blob_lookup_prefix(git_blob **blob, git_repository *repo, const git_oid *id, unsigned int len)
 {
@@ -99,7 +99,7 @@ GIT_EXTERN(size_t) git_blob_rawsize(git_blob *blob);
  *	this repository cannot be bare
  * @param path file from which the blob will be created,
  *	relative to the repository's working dir
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_blob_create_fromfile(git_oid *oid, git_repository *repo, const char *path);
 
@@ -111,7 +111,7 @@ GIT_EXTERN(int) git_blob_create_fromfile(git_oid *oid, git_repository *repo, con
  * @param repo repository where the blob will be written.
  *	this repository can be bare or not
  * @param path file from which the blob will be created
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_blob_create_fromdisk(git_oid *oid, git_repository *repo, const char *path);
 
@@ -123,7 +123,7 @@ GIT_EXTERN(int) git_blob_create_fromdisk(git_oid *oid, git_repository *repo, con
  * @param repo repository where to blob will be written
  * @param buffer data to be written into the blob
  * @param len length of the data
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_blob_create_frombuffer(git_oid *oid, git_repository *repo, const void *buffer, size_t len);
 
diff --git a/include/git2/branch.h b/include/git2/branch.h
index 69e7d1689..5ffc7ddd5 100644
--- a/include/git2/branch.h
+++ b/include/git2/branch.h
@@ -41,7 +41,7 @@ GIT_BEGIN_DECL
  *
  * @param force Overwrite existing branch.
  *
- * @return GIT_SUCCESS or an error code.
+ * @return 0 or an error code.
  * A proper reference is written in the refs/heads namespace
  * pointing to the provided target commit.
  */
@@ -63,7 +63,7 @@ GIT_EXTERN(int) git_branch_create(
  * @param branch_type Type of the considered branch. This should
  * be valued with either GIT_BRANCH_LOCAL or GIT_BRANCH_REMOTE.
  *
- * @return GIT_SUCCESS on success, GIT_ENOTFOUND if the branch
+ * @return 0 on success, GIT_NOTFOUND if the branch
  * doesn't exist or an error code.
  */
 GIT_EXTERN(int) git_branch_delete(
@@ -88,7 +88,7 @@ GIT_EXTERN(int) git_branch_delete(
  * listing. Valid values are GIT_BRANCH_LOCAL, GIT_BRANCH_REMOTE
  * or a combination of the two.
  *
- * @return GIT_SUCCESS or an error code.
+ * @return 0 or an error code.
  */
 GIT_EXTERN(int) git_branch_list(
 		git_strarray *branch_names,
@@ -108,7 +108,7 @@ GIT_EXTERN(int) git_branch_list(
  *
  * @param force Overwrite existing branch.
  *
- * @return GIT_SUCCESS on success, GIT_ENOTFOUND if the branch
+ * @return 0 on success, GIT_NOTFOUND if the branch
  * doesn't exist or an error code.
  */
 GIT_EXTERN(int) git_branch_move(
diff --git a/include/git2/commit.h b/include/git2/commit.h
index e519bc128..a6d9bb0e3 100644
--- a/include/git2/commit.h
+++ b/include/git2/commit.h
@@ -28,7 +28,7 @@ GIT_BEGIN_DECL
  * @param repo the repo to use when locating the commit.
  * @param id identity of the commit to locate. If the object is
  *		an annotated tag it will be peeled back to the commit.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_commit_lookup(git_commit **commit, git_repository *repo, const git_oid *id)
 {
@@ -46,7 +46,7 @@ GIT_INLINE(int) git_commit_lookup(git_commit **commit, git_repository *repo, con
  * @param id identity of the commit to locate. If the object is
  *		an annotated tag it will be peeled back to the commit.
  * @param len the length of the short identifier
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_commit_lookup_prefix(git_commit **commit, git_repository *repo, const git_oid *id, unsigned len)
 {
@@ -135,7 +135,7 @@ GIT_EXTERN(const git_signature *) git_commit_author(git_commit *commit);
  *
  * @param tree_out pointer where to store the tree object
  * @param commit a previously loaded commit.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_commit_tree(git_tree **tree_out, git_commit *commit);
 
@@ -163,7 +163,7 @@ GIT_EXTERN(unsigned int) git_commit_parentcount(git_commit *commit);
  * @param parent Pointer where to store the parent commit
  * @param commit a previously loaded commit.
  * @param n the position of the parent (from 0 to `parentcount`)
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_commit_parent(git_commit **parent, git_commit *commit, unsigned int n);
 
@@ -221,7 +221,7 @@ GIT_EXTERN(const git_oid *) git_commit_parent_oid(git_commit *commit, unsigned i
  * array may be NULL if `parent_count` is 0 (root commit). All the
  * given commits must be owned by the `repo`.
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  *	The created commit will be written to the Object Database and
  *	the given reference will be updated to point to it
  */
diff --git a/include/git2/config.h b/include/git2/config.h
index 983d7fc9a..36946c4a5 100644
--- a/include/git2/config.h
+++ b/include/git2/config.h
@@ -62,7 +62,7 @@ typedef struct {
  * global configuration file.
  *
  * @param global_config_path Buffer of GIT_PATH_MAX length to store the path
- * @return GIT_SUCCESS if a global configuration file has been
+ * @return 0 if a global configuration file has been
  *	found. Its path will be stored in `buffer`.
  */
 GIT_EXTERN(int) git_config_find_global(char *global_config_path, size_t length);
@@ -74,7 +74,7 @@ GIT_EXTERN(int) git_config_find_global(char *global_config_path, size_t length);
  * %PROGRAMFILES%\Git\etc\gitconfig.
 
  * @param system_config_path Buffer of GIT_PATH_MAX length to store the path
- * @return GIT_SUCCESS if a system configuration file has been
+ * @return 0 if a system configuration file has been
  *	found. Its path will be stored in `buffer`.
  */
 GIT_EXTERN(int) git_config_find_system(char *system_config_path, size_t length);
@@ -86,7 +86,7 @@ GIT_EXTERN(int) git_config_find_system(char *system_config_path, size_t length);
  * and opens the located file, if it exists.
  *
  * @param out Pointer to store the config instance
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_open_global(git_config **out);
 
@@ -110,7 +110,7 @@ GIT_EXTERN(int) git_config_file__ondisk(struct git_config_file **out, const char
  * can do anything with it.
  *
  * @param out pointer to the new configuration
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_new(git_config **out);
 
@@ -127,7 +127,7 @@ GIT_EXTERN(int) git_config_new(git_config **out);
  * @param cfg the configuration to add the file to
  * @param file the configuration file (backend) to add
  * @param priority the priority the backend should have
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_add_file(git_config *cfg, git_config_file *file, int priority);
 
@@ -148,7 +148,7 @@ GIT_EXTERN(int) git_config_add_file(git_config *cfg, git_config_file *file, int
  * @param cfg the configuration to add the file to
  * @param path path to the configuration file (backend) to add
  * @param priority the priority the backend should have
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_add_file_ondisk(git_config *cfg, const char *path, int priority);
 
@@ -163,7 +163,7 @@ GIT_EXTERN(int) git_config_add_file_ondisk(git_config *cfg, const char *path, in
  *
  * @param cfg The configuration instance to create
  * @param path Path to the on-disk file to open
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_open_ondisk(git_config **cfg, const char *path);
 
@@ -180,7 +180,7 @@ GIT_EXTERN(void) git_config_free(git_config *cfg);
  * @param out pointer to the variable where the value should be stored
  * @param cfg where to look for the variable
  * @param name the variable's name
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_get_int32(int32_t *out, git_config *cfg, const char *name);
 
@@ -190,7 +190,7 @@ GIT_EXTERN(int) git_config_get_int32(int32_t *out, git_config *cfg, const char *
  * @param out pointer to the variable where the value should be stored
  * @param cfg where to look for the variable
  * @param name the variable's name
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_get_int64(int64_t *out, git_config *cfg, const char *name);
 
@@ -203,7 +203,7 @@ GIT_EXTERN(int) git_config_get_int64(int64_t *out, git_config *cfg, const char *
  * @param out pointer to the variable where the value should be stored
  * @param cfg where to look for the variable
  * @param name the variable's name
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_get_bool(int *out, git_config *cfg, const char *name);
 
@@ -216,7 +216,7 @@ GIT_EXTERN(int) git_config_get_bool(int *out, git_config *cfg, const char *name)
  * @param out pointer to the variable's value
  * @param cfg where to look for the variable
  * @param name the variable's name
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_get_string(const char **out, git_config *cfg, const char *name);
 
@@ -240,7 +240,7 @@ GIT_EXTERN(int) git_config_get_multivar(git_config *cfg, const char *name, const
  * @param cfg where to look for the variable
  * @param name the variable's name
  * @param value Integer value for the variable
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_set_int32(git_config *cfg, const char *name, int32_t value);
 
@@ -250,7 +250,7 @@ GIT_EXTERN(int) git_config_set_int32(git_config *cfg, const char *name, int32_t
  * @param cfg where to look for the variable
  * @param name the variable's name
  * @param value Long integer value for the variable
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_set_int64(git_config *cfg, const char *name, int64_t value);
 
@@ -260,7 +260,7 @@ GIT_EXTERN(int) git_config_set_int64(git_config *cfg, const char *name, int64_t
  * @param cfg where to look for the variable
  * @param name the variable's name
  * @param value the value to store
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_set_bool(git_config *cfg, const char *name, int value);
 
@@ -273,7 +273,7 @@ GIT_EXTERN(int) git_config_set_bool(git_config *cfg, const char *name, int value
  * @param cfg where to look for the variable
  * @param name the variable's name
  * @param value the string to store.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_config_set_string(git_config *cfg, const char *name, const char *value);
 
@@ -307,7 +307,7 @@ GIT_EXTERN(int) git_config_delete(git_config *cfg, const char *name);
  * @param cfg where to get the variables from
  * @param callback the function to call on each variable
  * @param payload the data to pass to the callback
- * @return GIT_SUCCESS or the return value of the callback which didn't return 0
+ * @return 0 or the return value of the callback which didn't return 0
  */
 GIT_EXTERN(int) git_config_foreach(
 	git_config *cfg,
@@ -347,7 +347,7 @@ GIT_EXTERN(int) git_config_foreach(
  * @param name name of the config variable to lookup
  * @param maps array of `git_cvar_map` objects specifying the possible mappings
  * @param map_n number of mapping objects in `maps`
- * @return GIT_SUCCESS on success, error code otherwise
+ * @return 0 on success, error code otherwise
  */
 GIT_EXTERN(int) git_config_get_mapped(int *out, git_config *cfg, const char *name, git_cvar_map *maps, size_t map_n);
 
diff --git a/include/git2/errors.h b/include/git2/errors.h
index fa39a6730..361c0aca0 100644
--- a/include/git2/errors.h
+++ b/include/git2/errors.h
@@ -17,17 +17,54 @@
  */
 GIT_BEGIN_DECL
 
-typedef enum {
+#ifdef GIT_OLD_ERRORS
+enum {
 	GIT_SUCCESS = 0,
-	GIT_ERROR = -1,
+	GIT_ENOTOID = -2,
 	GIT_ENOTFOUND = -3,
+	GIT_ENOMEM = -4,
+	GIT_EOSERR = -5,
+	GIT_EOBJTYPE = -6,
+	GIT_ENOTAREPO = -7,
+	GIT_EINVALIDTYPE = -8,
+	GIT_EMISSINGOBJDATA = -9,
+	GIT_EPACKCORRUPTED = -10,
+	GIT_EFLOCKFAIL = -11,
+	GIT_EZLIB = -12,
+	GIT_EBUSY = -13,
+	GIT_EBAREINDEX = -14,
+	GIT_EINVALIDREFNAME = -15,
+	GIT_EREFCORRUPTED = -16,
+	GIT_ETOONESTEDSYMREF = -17,
+	GIT_EPACKEDREFSCORRUPTED = -18,
+	GIT_EINVALIDPATH = -19,
+	GIT_EREVWALKOVER = -20,
+	GIT_EINVALIDREFSTATE = -21,
+	GIT_ENOTIMPLEMENTED = -22,
 	GIT_EEXISTS = -23,
 	GIT_EOVERFLOW = -24,
+	GIT_ENOTNUM = -25,
+	GIT_ESTREAM = -26,
+	GIT_EINVALIDARGS = -27,
+	GIT_EOBJCORRUPTED = -28,
 	GIT_EAMBIGUOUS = -29,
 	GIT_EPASSTHROUGH = -30,
+	GIT_ENOMATCH = -31,
 	GIT_ESHORTBUFFER = -32,
-	GIT_EREVWALKOVER = -33,
-} git_error_t;
+};
+#endif
+
+/** Generic return codes */
+enum {
+	GIT_OK = 0,
+	GIT_ERROR = -1,
+	GIT_NOTFOUND = -3,
+	GIT_EXISTS = -23,
+	GIT_AMBIGUOUS = -29,
+	GIT_PASSTHROUGH = -30,
+	GIT_SHORTBUFFER = -32,
+	GIT_REVWALKOVER = -33,
+};
 
 typedef struct {
 	char *message;
@@ -50,7 +87,7 @@ typedef enum {
 	GITERR_TAG,
 	GITERR_TREE,
 	GITERR_INDEXER,
-} git_error_class;
+} git_error_t;
 
 /**
  * Return the last `git_error` object that was generated for the
diff --git a/include/git2/index.h b/include/git2/index.h
index ae727c59f..6a42c8515 100644
--- a/include/git2/index.h
+++ b/include/git2/index.h
@@ -106,7 +106,7 @@ typedef struct git_index_entry_unmerged {
  *
  * @param index the pointer for the new index
  * @param index_path the path to the index file in disk
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_open(git_index **index, const char *index_path);
 
@@ -131,7 +131,7 @@ GIT_EXTERN(void) git_index_free(git_index *index);
  * by reading from the hard disk.
  *
  * @param index an existing index object
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_read(git_index *index);
 
@@ -140,7 +140,7 @@ GIT_EXTERN(int) git_index_read(git_index *index);
  * using an atomic file lock.
  *
  * @param index an existing index object
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_write(git_index *index);
 
@@ -176,7 +176,7 @@ GIT_EXTERN(void) git_index_uniq(git_index *index);
  * @param index an existing index object
  * @param path filename to add
  * @param stage stage for the entry
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_add(git_index *index, const char *path, int stage);
 
@@ -188,7 +188,7 @@ GIT_EXTERN(int) git_index_add(git_index *index, const char *path, int stage);
  *
  * @param index an existing index object
  * @param source_entry new entry object
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_add2(git_index *index, const git_index_entry *source_entry);
 
@@ -207,7 +207,7 @@ GIT_EXTERN(int) git_index_add2(git_index *index, const git_index_entry *source_e
  * @param index an existing index object
  * @param path filename to add
  * @param stage stage for the entry
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_append(git_index *index, const char *path, int stage);
 
@@ -224,7 +224,7 @@ GIT_EXTERN(int) git_index_append(git_index *index, const char *path, int stage);
  *
  * @param index an existing index object
  * @param source_entry new entry object
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_append2(git_index *index, const git_index_entry *source_entry);
 
@@ -233,7 +233,7 @@ GIT_EXTERN(int) git_index_append2(git_index *index, const git_index_entry *sourc
  *
  * @param index an existing index object
  * @param position position of the entry to remove
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_remove(git_index *index, int position);
 
@@ -312,7 +312,7 @@ GIT_EXTERN(int) git_index_entry_stage(const git_index_entry *entry);
  *
  * @param index an existing index object
  * @param tree tree to read
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_index_read_tree(git_index *index, git_tree *tree);
 
diff --git a/include/git2/notes.h b/include/git2/notes.h
index ece5b274d..19073abd1 100644
--- a/include/git2/notes.h
+++ b/include/git2/notes.h
@@ -28,7 +28,7 @@ GIT_BEGIN_DECL
  * @param notes_ref OID reference to use (optional); defaults to "refs/notes/commits"
  * @param oid OID of the object
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_note_read(git_note **note, git_repository *repo,
 			      const char *notes_ref, const git_oid *oid);
@@ -62,7 +62,7 @@ GIT_EXTERN(const git_oid *) git_note_oid(git_note *note);
  * @param oid The OID of the object
  * @param oid The note to add for object oid
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_note_create(git_oid *out, git_repository *repo,
 				git_signature *author, git_signature *committer,
@@ -79,7 +79,7 @@ GIT_EXTERN(int) git_note_create(git_oid *out, git_repository *repo,
  * @param committer signature of the notes commit committer
  * @param oid the oid which note's to be removed
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_note_remove(git_repository *repo, const char *notes_ref,
 				git_signature *author, git_signature *committer,
@@ -98,7 +98,7 @@ GIT_EXTERN(void) git_note_free(git_note *note);
  * @param out Pointer to the default notes reference
  * @param repo The Git repository
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_note_default_ref(const char **out, git_repository *repo);
 
@@ -125,7 +125,7 @@ typedef struct {
  *
  * @param payload Extra parameter to callback function.
  *
- * @return GIT_SUCCESS or an error code.
+ * @return 0 or an error code.
  */
 GIT_EXTERN(int) git_note_foreach(
 		git_repository *repo,
diff --git a/include/git2/object.h b/include/git2/object.h
index 859d0c4a4..9e988b7b6 100644
--- a/include/git2/object.h
+++ b/include/git2/object.h
@@ -69,7 +69,7 @@ GIT_EXTERN(int) git_object_lookup(
  * @param id a short identifier for the object
  * @param len the length of the short identifier
  * @param type the type of the object
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_object_lookup_prefix(
 		git_object **object_out,
diff --git a/include/git2/odb.h b/include/git2/odb.h
index 87d70a60b..6f448f657 100644
--- a/include/git2/odb.h
+++ b/include/git2/odb.h
@@ -29,7 +29,7 @@ GIT_BEGIN_DECL
  *
  * @param out location to store the database pointer, if opened.
  *			Set to NULL if the open failed.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_odb_new(git_odb **out);
 
@@ -47,7 +47,7 @@ GIT_EXTERN(int) git_odb_new(git_odb **out);
  * @param out location to store the database pointer, if opened.
  *			Set to NULL if the open failed.
  * @param objects_dir path of the backends' "objects" directory.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_odb_open(git_odb **out, const char *objects_dir);
 
@@ -108,8 +108,8 @@ GIT_EXTERN(void) git_odb_free(git_odb *db);
  * @param db database to search for the object in.
  * @param id identity of the object to read.
  * @return
- * - GIT_SUCCESS if the object was read;
- * - GIT_ENOTFOUND if the object is not in the database.
+ * - 0 if the object was read;
+ * - GIT_NOTFOUND if the object is not in the database.
  */
 GIT_EXTERN(int) git_odb_read(git_odb_object **out, git_odb *db, const git_oid *id);
 
@@ -135,9 +135,9 @@ GIT_EXTERN(int) git_odb_read(git_odb_object **out, git_odb *db, const git_oid *i
  * @param db database to search for the object in.
  * @param short_id a prefix of the id of the object to read.
  * @param len the length of the prefix
- * @return GIT_SUCCESS if the object was read;
- *	GIT_ENOTFOUND if the object is not in the database.
- *	GIT_EAMBIGUOUS if the prefix is ambiguous (several objects match the prefix)
+ * @return 0 if the object was read;
+ *	GIT_NOTFOUND if the object is not in the database.
+ *	GIT_AMBIGUOUS if the prefix is ambiguous (several objects match the prefix)
  */
 GIT_EXTERN(int) git_odb_read_prefix(git_odb_object **out, git_odb *db, const git_oid *short_id, unsigned int len);
 
@@ -156,8 +156,8 @@ GIT_EXTERN(int) git_odb_read_prefix(git_odb_object **out, git_odb *db, const git
  * @param db database to search for the object in.
  * @param id identity of the object to read.
  * @return
- * - GIT_SUCCESS if the object was read;
- * - GIT_ENOTFOUND if the object is not in the database.
+ * - 0 if the object was read;
+ * - GIT_NOTFOUND if the object is not in the database.
  */
 GIT_EXTERN(int) git_odb_read_header(size_t *len_p, git_otype *type_p, git_odb *db, const git_oid *id);
 
@@ -188,7 +188,7 @@ GIT_EXTERN(int) git_odb_exists(git_odb *db, const git_oid *id);
  * @param data buffer with the data to storr
  * @param len size of the buffer
  * @param type type of the data to store
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_odb_write(git_oid *oid, git_odb *odb, const void *data, size_t len, git_otype type);
 
@@ -257,7 +257,7 @@ GIT_EXTERN(int) git_odb_open_rstream(git_odb_stream **stream, git_odb *db, const
  * @param data data to hash
  * @param len size of the data
  * @param type of the data to hash
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_odb_hash(git_oid *id, const void *data, size_t len, git_otype type);
 
@@ -270,7 +270,7 @@ GIT_EXTERN(int) git_odb_hash(git_oid *id, const void *data, size_t len, git_otyp
  * @param out oid structure the result is written into.
  * @param path file to read and determine object id for
  * @param type the type of the object that will be hashed
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_odb_hashfile(git_oid *out, const char *path, git_otype type);
 
diff --git a/include/git2/oid.h b/include/git2/oid.h
index 87efbab2f..c06458d24 100644
--- a/include/git2/oid.h
+++ b/include/git2/oid.h
@@ -43,7 +43,7 @@ struct _git_oid {
  * @param str input hex string; must be pointing at the start of
  *		the hex sequence and have at least the number of bytes
  *		needed for an oid encoded in hex (40 bytes).
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_oid_fromstr(git_oid *out, const char *str);
 
@@ -56,7 +56,7 @@ GIT_EXTERN(int) git_oid_fromstr(git_oid *out, const char *str);
  * @param out oid structure the result is written into.
  * @param str input hex string of at least size `length`
  * @param length length of the input string
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_oid_fromstrn(git_oid *out, const char *str, size_t length);
 
@@ -155,7 +155,7 @@ GIT_EXTERN(int) git_oid_ncmp(const git_oid *a, const git_oid *b, unsigned int le
  * @param a oid structure.
  * @param str input hex string of an object id.
  * @return GIT_ENOTOID if str is not a valid hex string,
- * GIT_SUCCESS in case of a match, GIT_ERROR otherwise.
+ * 0 in case of a match, GIT_ERROR otherwise.
  */
 GIT_EXTERN(int) git_oid_streq(const git_oid *a, const char *str);
 
diff --git a/include/git2/reflog.h b/include/git2/reflog.h
index d622abcad..f490e29de 100644
--- a/include/git2/reflog.h
+++ b/include/git2/reflog.h
@@ -28,7 +28,7 @@ GIT_BEGIN_DECL
  *
  * @param reflog pointer to reflog
  * @param ref reference to read the reflog for
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reflog_read(git_reflog **reflog, git_reference *ref);
 
@@ -46,7 +46,7 @@ GIT_EXTERN(int) git_reflog_read(git_reflog **reflog, git_reference *ref);
  * @param oid_old the OID the reference was pointing to
  * @param committer the signature of the committer
  * @param msg the reflog message
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reflog_write(git_reference *ref, const git_oid *oid_old, const git_signature *committer, const char *msg);
 
@@ -55,7 +55,7 @@ GIT_EXTERN(int) git_reflog_write(git_reference *ref, const git_oid *oid_old, con
  *
  * @param ref the reference
  * @param new_name the new name of the reference
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reflog_rename(git_reference *ref, const char *new_name);
 
@@ -63,7 +63,7 @@ GIT_EXTERN(int) git_reflog_rename(git_reference *ref, const char *new_name);
  * Delete the reflog for the given reference
  *
  * @param ref the reference
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reflog_delete(git_reference *ref);
 
diff --git a/include/git2/refs.h b/include/git2/refs.h
index 2760f9457..882e32769 100644
--- a/include/git2/refs.h
+++ b/include/git2/refs.h
@@ -28,7 +28,7 @@ GIT_BEGIN_DECL
  * @param reference_out pointer to the looked-up reference
  * @param repo the repository to look up the reference
  * @param name the long name for the reference (e.g. HEAD, ref/heads/master, refs/tags/v0.1.0, ...)
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_lookup(git_reference **reference_out, git_repository *repo, const char *name);
 
@@ -59,7 +59,7 @@ GIT_EXTERN(int) git_reference_name_to_oid(
  * @param name The name of the reference
  * @param target The target of the reference
  * @param force Overwrite existing references
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_create_symbolic(git_reference **ref_out, git_repository *repo, const char *name, const char *target, int force);
 
@@ -79,7 +79,7 @@ GIT_EXTERN(int) git_reference_create_symbolic(git_reference **ref_out, git_repos
  * @param name The name of the reference
  * @param id The object id pointed to by the reference.
  * @param force Overwrite existing references
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_create_oid(git_reference **ref_out, git_repository *repo, const char *name, const git_oid *id, int force);
 
@@ -137,7 +137,7 @@ GIT_EXTERN(const char *) git_reference_name(git_reference *ref);
  *
  * @param resolved_ref Pointer to the peeled reference
  * @param ref The reference
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_resolve(git_reference **resolved_ref, git_reference *ref);
 
@@ -160,7 +160,7 @@ GIT_EXTERN(git_repository *) git_reference_owner(git_reference *ref);
  *
  * @param ref The reference
  * @param target The new target for the reference
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_set_target(git_reference *ref, const char *target);
 
@@ -175,7 +175,7 @@ GIT_EXTERN(int) git_reference_set_target(git_reference *ref, const char *target)
  *
  * @param ref The reference
  * @param id The new target OID for the reference
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_set_oid(git_reference *ref, const git_oid *id);
 
@@ -202,7 +202,7 @@ GIT_EXTERN(int) git_reference_set_oid(git_reference *ref, const git_oid *id);
  * @param ref The reference to rename
  * @param new_name The new name for the reference
  * @param force Overwrite an existing reference
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  *
  */
 GIT_EXTERN(int) git_reference_rename(git_reference *ref, const char *new_name, int force);
@@ -216,7 +216,7 @@ GIT_EXTERN(int) git_reference_rename(git_reference *ref, const char *new_name, i
  * memory. The given reference pointer will no longer be valid.
  *
  * @param ref The reference to remove
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_delete(git_reference *ref);
 
@@ -231,7 +231,7 @@ GIT_EXTERN(int) git_reference_delete(git_reference *ref);
  * the loose references will be removed from disk.
  *
  * @param repo Repository where the loose refs will be packed
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_packall(git_repository *repo);
 
@@ -254,7 +254,7 @@ GIT_EXTERN(int) git_reference_packall(git_repository *repo);
  * @param repo Repository where to find the refs
  * @param list_flags Filtering flags for the reference
  *		listing.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_list(git_strarray *array, git_repository *repo, unsigned int list_flags);
 
@@ -276,7 +276,7 @@ GIT_EXTERN(int) git_reference_list(git_strarray *array, git_repository *repo, un
  *		listing.
  * @param callback Function which will be called for every listed ref
  * @param payload Additional data to pass to the callback
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_reference_foreach(git_repository *repo, unsigned int list_flags, int (*callback)(const char *, void *), void *payload);
 
@@ -304,7 +304,7 @@ GIT_EXTERN(int) git_reference_is_packed(git_reference *ref);
  * returned and the reference pointer will be invalidated.
  *
  * @param ref The reference to reload
- * @return GIT_SUCCESS on success, or an error code
+ * @return 0 on success, or an error code
  */
 GIT_EXTERN(int) git_reference_reload(git_reference *ref);
 
@@ -320,7 +320,7 @@ GIT_EXTERN(void) git_reference_free(git_reference *ref);
  *
  * @param ref1 The first git_reference
  * @param ref2 The second git_reference
- * @return GIT_SUCCESS if the same, else a stable but meaningless ordering.
+ * @return 0 if the same, else a stable but meaningless ordering.
  */
 GIT_EXTERN(int) git_reference_cmp(git_reference *ref1, git_reference *ref2);
 
diff --git a/include/git2/refspec.h b/include/git2/refspec.h
index 50aa596f9..c46c1876a 100644
--- a/include/git2/refspec.h
+++ b/include/git2/refspec.h
@@ -51,7 +51,7 @@ GIT_EXTERN(int) git_refspec_src_matches(const git_refspec *refspec, const char *
  * @param outlen the size ouf the `out` buffer
  * @param spec the refspec
  * @param name the name of the reference to transform
- * @return GIT_SUCCESS, GIT_ESHORTBUFFER or another error
+ * @return 0, GIT_SHORTBUFFER or another error
  */
 GIT_EXTERN(int) git_refspec_transform(char *out, size_t outlen, const git_refspec *spec, const char *name);
 
diff --git a/include/git2/remote.h b/include/git2/remote.h
index 6550cd20b..865dfef04 100644
--- a/include/git2/remote.h
+++ b/include/git2/remote.h
@@ -41,7 +41,7 @@ GIT_BEGIN_DECL
  * @param name the remote's name
  * @param url the remote repository's URL
  * @param fetch the fetch refspec to use for this remote
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_new(git_remote **out, git_repository *repo, const char *name, const char *url, const char *fetch);
 
@@ -51,7 +51,7 @@ GIT_EXTERN(int) git_remote_new(git_remote **out, git_repository *repo, const cha
  * @param out pointer to the new remote object
  * @param cfg the repository's configuration
  * @param name the remote's name
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_load(git_remote **out, git_repository *repo, const char *name);
 
@@ -59,7 +59,7 @@ GIT_EXTERN(int) git_remote_load(git_remote **out, git_repository *repo, const ch
  * Save a remote to its repository's configuration
  *
  * @param remote the remote to save to config
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_save(const git_remote *remote);
 
@@ -84,7 +84,7 @@ GIT_EXTERN(const char *) git_remote_url(git_remote *remote);
  *
  * @param remote the remote
  * @apram spec the new fetch refspec
- * @return GIT_SUCCESS or an error value
+ * @return 0 or an error value
  */
 GIT_EXTERN(int) git_remote_set_fetchspec(git_remote *remote, const char *spec);
 
@@ -101,7 +101,7 @@ GIT_EXTERN(const git_refspec *) git_remote_fetchspec(git_remote *remote);
  *
  * @param remote the remote
  * @apram spec the new push refspec
- * @return GIT_SUCCESS or an error value
+ * @return 0 or an error value
  */
 GIT_EXTERN(int) git_remote_set_pushspec(git_remote *remote, const char *spec);
 
@@ -123,7 +123,7 @@ GIT_EXTERN(const git_refspec *) git_remote_pushspec(git_remote *remote);
  *
  * @param remote the remote to connect to
  * @param direction whether you want to receive or send data
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_connect(git_remote *remote, int direction);
 
@@ -135,7 +135,7 @@ GIT_EXTERN(int) git_remote_connect(git_remote *remote, int direction);
  *
  * @param refs where to store the refs
  * @param remote the remote
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_ls(git_remote *remote, git_headlist_cb list_cb, void *payload);
 
@@ -150,7 +150,7 @@ GIT_EXTERN(int) git_remote_ls(git_remote *remote, git_headlist_cb list_cb, void
  *
  * @param remote the remote to download from
  * @param filename where to store the temproray filename
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_download(git_remote *remote, git_off_t *bytes, git_indexer_stats *stats);
 
@@ -215,7 +215,7 @@ GIT_EXTERN(int) git_remote_supported_url(const char* url);
  *
  * @param remotes_list a string array with the names of the remotes
  * @param repo the repository to query
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_remote_list(git_strarray *remotes_list, git_repository *repo);
 
diff --git a/include/git2/repository.h b/include/git2/repository.h
index d760c23b7..3949438cf 100644
--- a/include/git2/repository.h
+++ b/include/git2/repository.h
@@ -31,7 +31,7 @@ GIT_BEGIN_DECL
  *
  * @param repository pointer to the repo which will be opened
  * @param path the path to the repository
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_repository_open(git_repository **repository, const char *path);
 
@@ -61,7 +61,7 @@ GIT_EXTERN(int) git_repository_open(git_repository **repository, const char *pat
  * start_path no matter start_path appears in ceiling_dirs ceiling_dirs
  * might be NULL (which is equivalent to an empty string)
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_repository_discover(
 		char *repository_path,
@@ -109,7 +109,7 @@ GIT_EXTERN(void) git_repository_free(git_repository *repo);
  *		at the pointed path. If false, provided path will be considered as the working
  *		directory into which the .git directory will be created.
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_repository_init(git_repository **repo_out, const char *path, unsigned is_bare);
 
@@ -194,7 +194,7 @@ GIT_EXTERN(const char *) git_repository_workdir(git_repository *repo);
  *
  * @param repo A repository object
  * @param workdir The path to a working directory
- * @return GIT_SUCCESS, or an error code
+ * @return 0, or an error code
  */
 GIT_EXTERN(int) git_repository_set_workdir(git_repository *repo, const char *workdir);
 
@@ -218,7 +218,7 @@ GIT_EXTERN(int) git_repository_is_bare(git_repository *repo);
  *
  * @param out Pointer to store the loaded config file
  * @param repo A repository object
- * @return GIT_SUCCESS, or an error code
+ * @return 0, or an error code
  */
 GIT_EXTERN(int) git_repository_config(git_config **out, git_repository *repo);
 
@@ -249,7 +249,7 @@ GIT_EXTERN(void) git_repository_set_config(git_repository *repo, git_config *con
  *
  * @param out Pointer to store the loaded ODB
  * @param repo A repository object
- * @return GIT_SUCCESS, or an error code
+ * @return 0, or an error code
  */
 GIT_EXTERN(int) git_repository_odb(git_odb **out, git_repository *repo);
 
@@ -280,7 +280,7 @@ GIT_EXTERN(void) git_repository_set_odb(git_repository *repo, git_odb *odb);
  *
  * @param out Pointer to store the loaded index
  * @param repo A repository object
- * @return GIT_SUCCESS, or an error code
+ * @return 0, or an error code
  */
 GIT_EXTERN(int) git_repository_index(git_index **out, git_repository *repo);
 
diff --git a/include/git2/revwalk.h b/include/git2/revwalk.h
index 632c67588..aac6fb7c2 100644
--- a/include/git2/revwalk.h
+++ b/include/git2/revwalk.h
@@ -65,7 +65,7 @@ GIT_BEGIN_DECL
  *
  * @param walker pointer to the new revision walker
  * @param repo the repo to walk through
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_new(git_revwalk **walker, git_repository *repo);
 
@@ -97,7 +97,7 @@ GIT_EXTERN(void) git_revwalk_reset(git_revwalk *walker);
  *
  * @param walk the walker being used for the traversal.
  * @param oid the oid of the commit to start from.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_push(git_revwalk *walk, const git_oid *oid);
 
@@ -112,7 +112,7 @@ GIT_EXTERN(int) git_revwalk_push(git_revwalk *walk, const git_oid *oid);
  *
  * @param walk the walker being used for the traversal
  * @param glob the glob pattern references should match
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_push_glob(git_revwalk *walk, const char *glob);
 
@@ -120,7 +120,7 @@ GIT_EXTERN(int) git_revwalk_push_glob(git_revwalk *walk, const char *glob);
  * Push the repository's HEAD
  *
  * @param walk the walker being used for the traversal
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_push_head(git_revwalk *walk);
 
@@ -135,7 +135,7 @@ GIT_EXTERN(int) git_revwalk_push_head(git_revwalk *walk);
  *
  * @param walk the walker being used for the traversal.
  * @param oid the oid of commit that will be ignored during the traversal
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_hide(git_revwalk *walk, const git_oid *oid);
 
@@ -151,7 +151,7 @@ GIT_EXTERN(int) git_revwalk_hide(git_revwalk *walk, const git_oid *oid);
  *
  * @param walk the walker being used for the traversal
  * @param glob the glob pattern references should match
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_hide_glob(git_revwalk *walk, const char *glob);
 
@@ -159,7 +159,7 @@ GIT_EXTERN(int) git_revwalk_hide_glob(git_revwalk *walk, const char *glob);
  * Hide the repository's HEAD
  *
  * @param walk the walker being used for the traversal
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_hide_head(git_revwalk *walk);
 
@@ -170,7 +170,7 @@ GIT_EXTERN(int) git_revwalk_hide_head(git_revwalk *walk);
  *
  * @param walk the walker being used for the traversal
  * @param refname the referece to push
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_push_ref(git_revwalk *walk, const char *refname);
 
@@ -181,7 +181,7 @@ GIT_EXTERN(int) git_revwalk_push_ref(git_revwalk *walk, const char *refname);
  *
  * @param walk the walker being used for the traversal
  * @param refname the referece to hide
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_revwalk_hide_ref(git_revwalk *walk, const char *refname);
 
@@ -200,8 +200,8 @@ GIT_EXTERN(int) git_revwalk_hide_ref(git_revwalk *walk, const char *refname);
  *
  * @param oid Pointer where to store the oid of the next commit
  * @param walk the walker to pop the commit from.
- * @return GIT_SUCCESS if the next commit was found;
- *	GIT_EREVWALKOVER if there are no commits left to iterate
+ * @return 0 if the next commit was found;
+ *	GIT_REVWALKOVER if there are no commits left to iterate
  */
 GIT_EXTERN(int) git_revwalk_next(git_oid *oid, git_revwalk *walk);
 
diff --git a/include/git2/signature.h b/include/git2/signature.h
index e26a6c88f..cbf94269f 100644
--- a/include/git2/signature.h
+++ b/include/git2/signature.h
@@ -28,7 +28,7 @@ GIT_BEGIN_DECL
  * @param email email of the person
  * @param time time when the action happened
  * @param offset timezone offset in minutes for the time
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_signature_new(git_signature **sig_out, const char *name, const char *email, git_time_t time, int offset);
 
@@ -39,7 +39,7 @@ GIT_EXTERN(int) git_signature_new(git_signature **sig_out, const char *name, con
  * @param sig_out new signature, in case of error NULL
  * @param name name of the person
  * @param email email of the person
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_signature_now(git_signature **sig_out, const char *name, const char *email);
 
diff --git a/include/git2/status.h b/include/git2/status.h
index caa350325..080db9f3c 100644
--- a/include/git2/status.h
+++ b/include/git2/status.h
@@ -131,9 +131,9 @@ GIT_EXTERN(int) git_status_foreach_ext(
  * @param status_flags the status value
  * @param repo a repository object
  * @param path the file to retrieve status for, rooted at the repo's workdir
- * @return GIT_EINVALIDPATH when `path` points at a folder, GIT_ENOTFOUND when
+ * @return GIT_EINVALIDPATH when `path` points at a folder, GIT_NOTFOUND when
  *		the file doesn't exist in any of HEAD, the index or the worktree,
- *		GIT_SUCCESS otherwise
+ *		0 otherwise
  */
 GIT_EXTERN(int) git_status_file(
 	unsigned int *status_flags,
diff --git a/include/git2/submodule.h b/include/git2/submodule.h
index 930168275..9e6118b98 100644
--- a/include/git2/submodule.h
+++ b/include/git2/submodule.h
@@ -85,13 +85,13 @@ GIT_EXTERN(int) git_submodule_foreach(
  *
  * Given either the submodule name or path (they are ususally the same),
  * this returns a structure describing the submodule.  If the submodule
- * does not exist, this will return GIT_ENOTFOUND and set the submodule
+ * does not exist, this will return GIT_NOTFOUND and set the submodule
  * pointer to NULL.
  *
  * @param submodule Pointer to submodule description object pointer..
  * @param repo The repository.
  * @param name The name of the submodule.  Trailing slashes will be ignored.
- * @return 0 on success, GIT_ENOTFOUND if submodule does not exist, -1 on error
+ * @return 0 on success, GIT_NOTFOUND if submodule does not exist, -1 on error
  */
 GIT_EXTERN(int) git_submodule_lookup(
 	git_submodule **submodule,
diff --git a/include/git2/tag.h b/include/git2/tag.h
index 8224edfea..7f318adf9 100644
--- a/include/git2/tag.h
+++ b/include/git2/tag.h
@@ -27,7 +27,7 @@ GIT_BEGIN_DECL
  * @param tag pointer to the looked up tag
  * @param repo the repo to use when locating the tag.
  * @param id identity of the tag to locate.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_tag_lookup(git_tag **tag, git_repository *repo, const git_oid *id)
 {
@@ -44,7 +44,7 @@ GIT_INLINE(int) git_tag_lookup(git_tag **tag, git_repository *repo, const git_oi
  * @param repo the repo to use when locating the tag.
  * @param id identity of the tag to locate.
  * @param len the length of the short identifier
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_tag_lookup_prefix(git_tag **tag, git_repository *repo, const git_oid *id, unsigned int len)
 {
@@ -85,7 +85,7 @@ GIT_EXTERN(const git_oid *) git_tag_id(git_tag *tag);
  *
  * @param target pointer where to store the target
  * @param tag a previously loaded tag.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tag_target(git_object **target, git_tag *tag);
 
@@ -143,7 +143,7 @@ GIT_EXTERN(const char *) git_tag_message(git_tag *tag);
  * @param oid Pointer where to store the OID of the
  * newly created tag. If the tag already exists, this parameter
  * will be the oid of the existing tag, and the function will
- * return a GIT_EEXISTS error code.
+ * return a GIT_EXISTS error code.
  *
  * @param repo Repository where to store the tag
  *
@@ -161,7 +161,7 @@ GIT_EXTERN(const char *) git_tag_message(git_tag *tag);
  *
  * @param force Overwrite existing references
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  *	A tag object is written to the ODB, and a proper reference
  *	is written in the /refs/tags folder, pointing to it
  */
@@ -199,7 +199,7 @@ GIT_EXTERN(int) git_tag_create_frombuffer(
  * @param oid Pointer where to store the OID of the provided
  * target object. If the tag already exists, this parameter
  * will be filled with the oid of the existing pointed object
- * and the function will return a GIT_EEXISTS error code.
+ * and the function will return a GIT_EXISTS error code.
  *
  * @param repo Repository where to store the lightweight tag
  *
@@ -212,7 +212,7 @@ GIT_EXTERN(int) git_tag_create_frombuffer(
  *
  * @param force Overwrite existing references
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  *	A proper reference is written in the /refs/tags folder,
  * pointing to the provided target object
  */
@@ -231,7 +231,7 @@ GIT_EXTERN(int) git_tag_create_lightweight(
  * @param tag_name Name of the tag to be deleted;
  * this name is validated for consistency.
  *
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tag_delete(
 		git_repository *repo,
@@ -248,7 +248,7 @@ GIT_EXTERN(int) git_tag_delete(
  * @param tag_names Pointer to a git_strarray structure where
  *		the tag names will be stored
  * @param repo Repository where to find the tags
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tag_list(
 		git_strarray *tag_names,
@@ -270,7 +270,7 @@ GIT_EXTERN(int) git_tag_list(
  *		the tag names will be stored
  * @param pattern Standard fnmatch pattern
  * @param repo Repository where to find the tags
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tag_list_match(
 		git_strarray *tag_names,
@@ -286,7 +286,7 @@ GIT_EXTERN(int) git_tag_list_match(
  *
  * @param tag_target Pointer to the peeled git_object
  * @param tag The tag to be processed
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tag_peel(
 		git_object **tag_target,
diff --git a/include/git2/tree.h b/include/git2/tree.h
index 0d9db430a..3b3b0e2f8 100644
--- a/include/git2/tree.h
+++ b/include/git2/tree.h
@@ -27,7 +27,7 @@ GIT_BEGIN_DECL
  * @param tree pointer to the looked up tree
  * @param repo the repo to use when locating the tree.
  * @param id identity of the tree to locate.
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_tree_lookup(git_tree **tree, git_repository *repo, const git_oid *id)
 {
@@ -44,7 +44,7 @@ GIT_INLINE(int) git_tree_lookup(git_tree **tree, git_repository *repo, const git
  * @param repo the repo to use when locating the tree.
  * @param id identity of the tree to locate.
  * @param len the length of the short identifier
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_INLINE(int) git_tree_lookup_prefix(git_tree **tree, git_repository *repo, const git_oid *id, unsigned int len)
 {
@@ -141,7 +141,7 @@ GIT_EXTERN(git_otype) git_tree_entry_type(const git_tree_entry *entry);
  * @param object pointer to the converted object
  * @param repo repository where to lookup the pointed object
  * @param entry a tree entry
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tree_entry_to_object(git_object **object_out, git_repository *repo, const git_tree_entry *entry);
 
@@ -159,7 +159,7 @@ GIT_EXTERN(int) git_tree_entry_to_object(git_object **object_out, git_repository
  *
  * @param oid Pointer where to store the written tree
  * @param index Index to write
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tree_create_fromindex(git_oid *oid, git_index *index);
 
@@ -229,7 +229,7 @@ GIT_EXTERN(const git_tree_entry *) git_treebuilder_get(git_treebuilder *bld, con
  * @param filename Filename of the entry
  * @param id SHA1 oid of the entry
  * @param attributes Folder attributes of the entry
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_treebuilder_insert(git_tree_entry **entry_out, git_treebuilder *bld, const char *filename, const git_oid *id, unsigned int attributes);
 
@@ -264,7 +264,7 @@ GIT_EXTERN(void) git_treebuilder_filter(git_treebuilder *bld, int (*filter)(cons
  * @param oid Pointer where to store the written OID
  * @param repo Repository where to store the object
  * @param bld Tree builder to write
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_treebuilder_write(git_oid *oid, git_repository *repo, git_treebuilder *bld);
 
@@ -278,8 +278,7 @@ GIT_EXTERN(int) git_treebuilder_write(git_oid *oid, git_repository *repo, git_tr
  * @param subtree Pointer where to store the subtree
  * @param root A previously loaded tree which will be the root of the relative path
  * @param subtree_path Path to the contained subtree
- * @return GIT_SUCCESS on success; GIT_ENOTFOUND if the path does not lead to a
- * subtree, GIT_EINVALIDPATH or an error code
+ * @return 0 on success; GIT_NOTFOUND if the path does not lead to a subtree
  */
 GIT_EXTERN(int) git_tree_get_subtree(git_tree **subtree, git_tree *root, const char *subtree_path);
 
@@ -309,7 +308,7 @@ enum git_treewalk_mode {
  * @param callback Function to call on each tree entry
  * @param mode Traversal mode (pre or post-order)
  * @param payload Opaque pointer to be passed on each callback
- * @return GIT_SUCCESS or an error code
+ * @return 0 or an error code
  */
 GIT_EXTERN(int) git_tree_walk(git_tree *tree, git_treewalk_cb callback, int mode, void *payload);