use utils helper macros/functions through the whole lib

* use to_unicode()/to_unicode_n() for creation of unicode strings
* main support switch to python3 instead of python2 (provide defines for python2)

include/pygit2/oid.h

@@ -38,6 +38,6 @@ int py_str_to_git_oid_expand(git_repository *repo, PyObject *py_str,
 PyObject* git_oid_to_py_str(const git_oid *oid);
 
 #define git_oid_to_python(id) \
-        PyString_FromStringAndSize((const char*)id, GIT_OID_RAWSZ)
+        PyBytes_FromStringAndSize((const char*)id, GIT_OID_RAWSZ)
 
 #endif

include/pygit2/utils.h

@@ -33,25 +33,22 @@
 #include <git2.h>
 #include <pygit2/types.h>
 
-
-/* Python 3 support */
-#if PY_MAJOR_VERSION >= 3
-  #define PyInt_AsLong PyLong_AsLong
-  #define PyInt_Check PyLong_Check
-  #define PyInt_FromLong PyLong_FromLong
-  #define PyString_AS_STRING PyBytes_AS_STRING
-  #define PyString_AsString PyBytes_AsString
-  #define PyString_AsStringAndSize PyBytes_AsStringAndSize
-  #define PyString_Check PyBytes_Check
-  #define PyString_FromString PyBytes_FromString
-  #define PyString_FromStringAndSize PyBytes_FromStringAndSize
-  #define PyString_Size PyBytes_Size
-#endif
-
+/* Python 2 support */
 #if PY_MAJOR_VERSION == 2
+  #define PyLong_FromSize_t PyInt_FromSize_t
+  #define PyLong_AsLong PyInt_AsLong
+  #undef PyLong_Check
+  #define PyLong_Check PyInt_Check
+  #define PyLong_FromLong PyInt_FromLong
+  #define PyBytes_AS_STRING PyString_AS_STRING
+  #define PyBytes_AsString PyString_AsString
+  #define PyBytes_AsStringAndSize PyString_AsStringAndSize
+  #define PyBytes_Check PyString_Check
+  #define PyBytes_FromString PyString_FromString
+  #define PyBytes_FromStringAndSize PyString_FromStringAndSize
+  #define PyBytes_Size PyString_Size
   #define to_path(x) to_bytes(x)
   #define to_encoding(x) to_bytes(x)
-  #define PyLong_FromSize_t PyInt_FromSize_t
 #else
   #define to_path(x) to_unicode(x, Py_FileSystemDefaultEncoding, "strict")
   #define to_encoding(x) PyUnicode_DecodeASCII(x, strlen(x), "strict")
@@ -69,9 +66,12 @@
         return -1;\
     }
 
+
 /* Utilities */
+#define to_unicode(x, encoding, errors) to_unicode_n(x, strlen(x), encoding, errors)
+
 Py_LOCAL_INLINE(PyObject*)
-to_unicode(const char *value, const char *encoding, const char *errors)
+to_unicode_n(const char *value, size_t len, const char *encoding, const char *errors)
 {
     if (encoding == NULL) {
         /* If the encoding is not explicit, it may not be UTF-8, so it
@@ -81,13 +81,14 @@ to_unicode(const char *value, const char *encoding, const char *errors)
         encoding = "utf-8";
         errors = "replace";
     }
-    return PyUnicode_Decode(value, strlen(value), encoding, errors);
+
+    return PyUnicode_Decode(value, len, encoding, errors);
 }
 
 Py_LOCAL_INLINE(PyObject*)
 to_bytes(const char * value)
 {
-    return PyString_FromString(value);
+    return PyBytes_FromString(value);
 }
 
 char * py_str_to_c_str(PyObject *value, const char *encoding);

src/blob.c

@@ -37,7 +37,7 @@ PyDoc_STRVAR(Blob_size__doc__, "Size.");
 PyObject *
 Blob_size__get__(Blob *self)
 {
-    return PyInt_FromLong(git_blob_rawsize(self->blob));
+    return PyLong_FromLong(git_blob_rawsize(self->blob));
 }
 
 

src/commit.c

@@ -68,7 +68,7 @@ PyDoc_STRVAR(Commit__message__doc__, "Message (bytes).");
 PyObject *
 Commit__message__get__(Commit *commit)
 {
-    return PyString_FromString(git_commit_message(commit->commit));
+    return PyBytes_FromString(git_commit_message(commit->commit));
 }
 
 

src/config.c

@@ -191,7 +191,7 @@ Config_getitem(Config *self, PyObject *py_key)
     else if(git_config_parse_bool(&value_bool, value_str) == 0)
       py_value = PyBool_FromLong(value_bool);
     else
-      py_value = PyUnicode_FromString(value_str);
+      py_value = to_unicode(value_str, NULL, NULL);
 
 cleanup:
     free(key);
@@ -223,9 +223,9 @@ Config_setitem(Config *self, PyObject *py_key, PyObject *py_value)
     else if (PyBool_Check(py_value)) {
         err = git_config_set_bool(self->config, key,
                 (int)PyObject_IsTrue(py_value));
-    } else if (PyInt_Check(py_value)) {
+    } else if (PyLong_Check(py_value)) {
         err = git_config_set_int64(self->config, key,
-                (int64_t)PyInt_AsLong(py_value));
+                (int64_t)PyLong_AsLong(py_value));
     } else {
         value = py_str_to_c_str(py_value, NULL);
         err = git_config_set_string(self->config, key, value);
@@ -300,7 +300,7 @@ Config_foreach(Config *self, PyObject *args)
     ret = git_config_foreach(self->config, Config_foreach_callback_wrapper,
             (void *)args);
 
-    return PyInt_FromLong((long)ret);
+    return PyLong_FromLong((long)ret);
 }
 
 
@@ -344,7 +344,7 @@ Config_get_multivar_fn_wrapper(const git_config_entry *value, void *data)
 {
     PyObject *item = NULL;
 
-    if (!(item = PyUnicode_FromString(value->value)))
+    if (!(item = to_unicode(value->value, NULL, NULL)))
         return -2;
 
     PyList_Append((PyObject *)data, item);

src/diff.c

@@ -86,7 +86,7 @@ diff_get_patch_byindex(git_diff_list* list, size_t idx)
 
                 py_hunk->lines = PyList_New(lines_in_hunk + 1);
                 PyList_SetItem(py_hunk->lines, 0,
-                    PyUnicode_FromStringAndSize(header, header_len));
+                    to_unicode_n(header, header_len, NULL, NULL));
                 for (j=1; j < lines_in_hunk + 1; ++j) {
                     err = git_diff_patch_get_line_in_hunk(NULL, &line,
                               &line_len, NULL, NULL, patch, i, j - 1);
@@ -95,7 +95,7 @@ diff_get_patch_byindex(git_diff_list* list, size_t idx)
                       goto cleanup;
 
                     PyList_SetItem(py_hunk->lines, j,
-                        PyUnicode_FromStringAndSize(line, line_len));
+                        to_unicode_n(line, line_len, NULL, NULL));
                 }
 
                 PyList_SetItem((PyObject*) py_patch->hunks, i,
@@ -263,7 +263,7 @@ Diff_patch__get__(Diff *self)
     }
     free(strings);
 
-    py_patch = PyUnicode_FromString(buffer);
+    py_patch = to_unicode(buffer, NULL, NULL);
     free(buffer);
 
 cleanup:

src/index.c

@@ -178,7 +178,7 @@ Index__find(Index *self, PyObject *py_path)
     size_t idx;
     int err;
 
-    path = PyString_AsString(py_path);
+    path = PyBytes_AsString(py_path);
     if (!path)
         return NULL;
 
@@ -236,8 +236,8 @@ Index_get_position(Index *self, PyObject *value)
     int err;
 
     /* Case 1: integer */
-    if (PyInt_Check(value)) {
-        err = (int)PyInt_AsLong(value);
+    if (PyLong_Check(value)) {
+        err = (int)PyLong_AsLong(value);
         if (err == -1 && PyErr_Occurred())
             return -1;
         if (err < 0) {
@@ -567,7 +567,7 @@ PyDoc_STRVAR(IndexEntry_mode__doc__, "Mode.");
 PyObject *
 IndexEntry_mode__get__(IndexEntry *self)
 {
-    return PyInt_FromLong(self->entry->mode);
+    return PyLong_FromLong(self->entry->mode);
 }
 
 

src/note.c

@@ -82,7 +82,7 @@ PyDoc_STRVAR(Note_message__doc__,
 PyObject *
 Note_message__get__(Note *self)
 {
-  return PyUnicode_FromString(git_note_message(self->note));
+  return to_unicode(git_note_message(self->note), NULL, NULL);
 }
 
 

src/object.c

@@ -86,7 +86,7 @@ PyDoc_STRVAR(Object_type__doc__,
 PyObject *
 Object_type__get__(Object *self)
 {
-    return PyInt_FromLong(git_object_type(self->obj));
+    return PyLong_FromLong(git_object_type(self->obj));
 }
 
 
@@ -107,7 +107,7 @@ Object_read_raw(Object *self)
     if (obj == NULL)
         return NULL;
 
-    aux = PyString_FromStringAndSize(
+    aux = PyBytes_FromStringAndSize(
         git_odb_object_data(obj),
         git_odb_object_size(obj));
 

src/oid.c

@@ -41,8 +41,8 @@ py_str_to_git_oid(PyObject *py_str, git_oid *oid)
     Py_ssize_t len;
 
     /* Case 1: raw sha */
-    if (PyString_Check(py_str)) {
-        hex_or_bin = PyString_AsString(py_str);
+    if (PyBytes_Check(py_str)) {
+        hex_or_bin = PyBytes_AsString(py_str);
         if (hex_or_bin == NULL)
             return -1;
         git_oid_fromraw(oid, (const unsigned char*)hex_or_bin);
@@ -54,7 +54,7 @@ py_str_to_git_oid(PyObject *py_str, git_oid *oid)
         py_hex = PyUnicode_AsASCIIString(py_str);
         if (py_hex == NULL)
             return -1;
-        err = PyString_AsStringAndSize(py_hex, &hex_or_bin, &len);
+        err = PyBytes_AsStringAndSize(py_hex, &hex_or_bin, &len);
         if (err) {
             Py_DECREF(py_hex);
             return -1;
@@ -118,6 +118,6 @@ git_oid_to_py_str(const git_oid *oid)
     char hex[GIT_OID_HEXSZ];
 
     git_oid_fmt(hex, oid);
-    return PyUnicode_DecodeASCII(hex, GIT_OID_HEXSZ, "strict");
+    return to_unicode_n(hex, GIT_OID_HEXSZ, "utf-8", "strict");
 }
 

src/reference.c

@@ -342,7 +342,7 @@ Reference_type__get__(Reference *self)
 
     CHECK_REFERENCE(self);
     c_type = git_reference_type(self->reference);
-    return PyInt_FromLong(c_type);
+    return PyLong_FromLong(c_type);
 }
 
 

src/remote.c

@@ -71,7 +71,7 @@ PyDoc_STRVAR(Remote_name__doc__, "Name of the remote refspec");
 PyObject *
 Remote_name__get__(Remote *self)
 {
-    return PyUnicode_FromString(git_remote_name(self->remote));
+    return to_unicode(git_remote_name(self->remote), NULL, NULL);
 }
 
 int
@@ -100,7 +100,7 @@ PyDoc_STRVAR(Remote_url__doc__, "Url of the remote");
 PyObject *
 Remote_url__get__(Remote *self)
 {
-    return PyUnicode_FromString(git_remote_url(self->remote));
+    return to_unicode(git_remote_url(self->remote), NULL, NULL);
 }
 
 

src/repository.c

@@ -892,11 +892,11 @@ Repository_create_symbolic_reference(Repository *self,  PyObject *args,
         return NULL;
 
     #if PY_MAJOR_VERSION == 2
-    c_target = PyString_AsString(py_obj);
+    c_target = PyBytes_AsString(py_obj);
     #else
     // increases ref counter, so we have to release it afterwards
     PyObject* py_str = PyUnicode_AsASCIIString(py_obj);
-    c_target = PyString_AsString(py_str);
+    c_target = PyBytes_AsString(py_str);
     #endif
     if (c_target == NULL)
         return NULL;
@@ -928,7 +928,7 @@ read_status_cb(const char *path, unsigned int status_flags, void *payload)
     PyObject *flags;
     int err;
 
-    flags = PyInt_FromLong((long) status_flags);
+    flags = PyLong_FromLong((long) status_flags);
     err = PyDict_SetItemString(payload, path, flags);
     Py_CLEAR(flags);
 
@@ -972,7 +972,7 @@ Repository_status_file(Repository *self, PyObject *value)
         free(path);
         return err_obj;
     }
-    return PyInt_FromLong(status);
+    return PyLong_FromLong(status);
 }
 
 

src/signature.c

@@ -148,7 +148,7 @@ PyDoc_STRVAR(Signature_time__doc__, "Unix time.");
 PyObject *
 Signature_time__get__(Signature *self)
 {
-    return PyInt_FromLong(self->signature->when.time);
+    return PyLong_FromLong(self->signature->when.time);
 }
 
 
@@ -157,7 +157,7 @@ PyDoc_STRVAR(Signature_offset__doc__, "Offset from UTC in minutes.");
 PyObject *
 Signature_offset__get__(Signature *self)
 {
-    return PyInt_FromLong(self->signature->when.offset);
+    return PyLong_FromLong(self->signature->when.offset);
 }
 
 PyGetSetDef Signature_getseters[] = {

src/tag.c

@@ -91,7 +91,7 @@ PyDoc_STRVAR(Tag__message__doc__, "Tag message (bytes).");
 PyObject *
 Tag__message__get__(Tag *self)
 {
-    return PyString_FromString(git_tag_message(self->tag));
+    return PyBytes_FromString(git_tag_message(self->tag));
 }
 
 PyGetSetDef Tag_getseters[] = {

src/tree.c

@@ -53,7 +53,7 @@ PyDoc_STRVAR(TreeEntry_filemode__doc__, "Filemode.");
 PyObject *
 TreeEntry_filemode__get__(TreeEntry *self)
 {
-    return PyInt_FromLong(git_tree_entry_filemode(self->entry));
+    return PyLong_FromLong(git_tree_entry_filemode(self->entry));
 }
 
 
@@ -201,7 +201,7 @@ Tree_fix_index(Tree *self, PyObject *py_index)
     size_t len;
     long slen;
 
-    index = PyInt_AsLong(py_index);
+    index = PyLong_AsLong(py_index);
     if (PyErr_Occurred())
         return -1;
 
@@ -263,7 +263,7 @@ Tree_getitem(Tree *self, PyObject *value)
     int err;
 
     /* Case 1: integer */
-    if (PyInt_Check(value))
+    if (PyLong_Check(value))
         return Tree_getitem_by_index(self, value);
 
     /* Case 2: byte or text string */

src/utils.c

@@ -38,8 +38,8 @@ char * py_str_to_c_str(PyObject *value, const char *encoding)
 {
     char *c_str = NULL;
     /* Case 1: byte string */
-    if (PyString_Check(value))
-        return strdup(PyString_AsString(value));
+    if (PyBytes_Check(value))
+        return strdup(PyBytes_AsString(value));
 
     /* Case 2: text string */
     if (PyUnicode_Check(value)) {
@@ -50,7 +50,7 @@ char * py_str_to_c_str(PyObject *value, const char *encoding)
             value = PyUnicode_AsEncodedString(value, encoding, "strict");
         if (value == NULL)
             return NULL;
-        c_str = strdup(PyString_AsString(value));
+        c_str = strdup(PyBytes_AsString(value));
         Py_DECREF(value);
         return c_str;
     }

src/walker.c

@@ -100,7 +100,7 @@ Walker_sort(Walker *self, PyObject *py_sort_mode)
 {
     int sort_mode;
 
-    sort_mode = (int)PyInt_AsLong(py_sort_mode);
+    sort_mode = (int)PyLong_AsLong(py_sort_mode);
     if (sort_mode == -1 && PyErr_Occurred())
         return NULL;