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oid.c
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332 lines (280 loc) · 9.3 KB
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/*
* Copyright 2010-2017 The pygit2 contributors
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* as published by the Free Software Foundation.
*
* In addition to the permissions in the GNU General Public License,
* the authors give you unlimited permission to link the compiled
* version of this file into combinations with other programs,
* and to distribute those combinations without any restriction
* coming from the use of this file. (The General Public License
* restrictions do apply in other respects; for example, they cover
* modification of the file, and distribution when not linked into
* a combined executable.)
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include <git2.h>
#include "utils.h"
#include "error.h"
#include "oid.h"
PyTypeObject OidType;
PyObject *
git_oid_to_python(const git_oid *oid)
{
Oid *py_oid;
py_oid = PyObject_New(Oid, &OidType);
git_oid_cpy(&(py_oid->oid), oid);
return (PyObject*)py_oid;
}
size_t
py_hex_to_git_oid(PyObject *py_oid, git_oid *oid)
{
PyObject *py_hex;
int err;
char *hex;
Py_ssize_t len;
#if PY_MAJOR_VERSION == 2
/* Bytes (only supported in Python 2) */
if (PyBytes_Check(py_oid)) {
err = PyBytes_AsStringAndSize(py_oid, &hex, &len);
if (err)
return 0;
err = git_oid_fromstrn(oid, hex, len);
if (err < 0) {
PyErr_SetObject(Error_type(err), py_oid);
return 0;
}
return (size_t)len;
}
#endif
/* Unicode */
if (PyUnicode_Check(py_oid)) {
py_hex = PyUnicode_AsASCIIString(py_oid);
if (py_hex == NULL)
return 0;
err = PyBytes_AsStringAndSize(py_hex, &hex, &len);
if (err) {
Py_DECREF(py_hex);
return 0;
}
err = git_oid_fromstrn(oid, hex, len);
Py_DECREF(py_hex);
if (err < 0) {
PyErr_SetObject(Error_type(err), py_oid);
return 0;
}
return (size_t)len;
}
/* Type error */
PyErr_SetObject(PyExc_TypeError, py_oid);
return 0;
}
size_t
py_oid_to_git_oid(PyObject *py_oid, git_oid *oid)
{
/* Oid */
if (PyObject_TypeCheck(py_oid, (PyTypeObject*)&OidType)) {
git_oid_cpy(oid, &((Oid*)py_oid)->oid);
return GIT_OID_HEXSZ;
}
/* Hex */
return py_hex_to_git_oid(py_oid, oid);
}
int
py_oid_to_git_oid_expand(git_repository *repo, PyObject *py_str, git_oid *oid)
{
int err;
size_t len;
git_odb *odb = NULL;
git_oid tmp;
len = py_oid_to_git_oid(py_str, oid);
if (len == 0)
return -1;
if (len == GIT_OID_HEXSZ)
return 0;
/* Short oid */
err = git_repository_odb(&odb, repo);
if (err < 0)
goto error;
err = git_odb_exists_prefix(&tmp, odb, oid, len);
if (err < 0)
goto error;
git_oid_cpy(oid, &tmp);
git_odb_free(odb);
return 0;
error:
git_odb_free(odb);
Error_set(err);
return -1;
}
PyObject *
git_oid_to_py_str(const git_oid *oid)
{
char hex[GIT_OID_HEXSZ];
git_oid_fmt(hex, oid);
#if PY_MAJOR_VERSION == 2
return PyBytes_FromStringAndSize(hex, GIT_OID_HEXSZ);
#else
return to_unicode_n(hex, GIT_OID_HEXSZ, "utf-8", "strict");
#endif
}
int
Oid_init(Oid *self, PyObject *args, PyObject *kw)
{
char *keywords[] = {"raw", "hex", NULL};
PyObject *raw = NULL, *hex = NULL;
int err;
char *bytes;
Py_ssize_t len;
if (!PyArg_ParseTupleAndKeywords(args, kw, "|OO", keywords, &raw, &hex))
return -1;
/* We expect one or the other, but not both. */
if (raw == NULL && hex == NULL) {
PyErr_SetString(PyExc_ValueError, "Expected raw or hex.");
return -1;
}
if (raw != NULL && hex != NULL) {
PyErr_SetString(PyExc_ValueError, "Expected raw or hex, not both.");
return -1;
}
/* Case 1: raw */
if (raw != NULL) {
err = PyBytes_AsStringAndSize(raw, &bytes, &len);
if (err)
return -1;
if (len > GIT_OID_RAWSZ) {
PyErr_SetObject(PyExc_ValueError, raw);
return -1;
}
memcpy(self->oid.id, (const unsigned char*)bytes, len);
return 0;
}
/* Case 2: hex */
len = py_hex_to_git_oid(hex, &self->oid);
if (len == 0)
return -1;
return 0;
}
Py_hash_t
Oid_hash(PyObject *oid)
{
PyObject *py_oid = git_oid_to_py_str(&((Oid *)oid)->oid);
Py_hash_t ret = PyObject_Hash(py_oid);
Py_DECREF(py_oid);
return ret;
}
PyObject *
Oid_richcompare(PyObject *o1, PyObject *o2, int op)
{
PyObject *res;
int cmp;
/* Comparing to something else than an Oid is not supported. */
if (!PyObject_TypeCheck(o2, &OidType)) {
Py_INCREF(Py_NotImplemented);
return Py_NotImplemented;
}
/* Ok go. */
cmp = git_oid_cmp(&((Oid*)o1)->oid, &((Oid*)o2)->oid);
switch (op) {
case Py_LT:
res = (cmp <= 0) ? Py_True: Py_False;
break;
case Py_LE:
res = (cmp < 0) ? Py_True: Py_False;
break;
case Py_EQ:
res = (cmp == 0) ? Py_True: Py_False;
break;
case Py_NE:
res = (cmp != 0) ? Py_True: Py_False;
break;
case Py_GT:
res = (cmp > 0) ? Py_True: Py_False;
break;
case Py_GE:
res = (cmp >= 0) ? Py_True: Py_False;
break;
default:
PyErr_Format(PyExc_RuntimeError, "Unexpected '%d' op", op);
return NULL;
}
Py_INCREF(res);
return res;
}
PyObject *
Oid__str__(Oid *self)
{
return git_oid_to_py_str(&self->oid);
}
PyDoc_STRVAR(Oid_raw__doc__, "Raw oid, a 20 bytes string.");
PyObject *
Oid_raw__get__(Oid *self)
{
return PyBytes_FromStringAndSize((const char*)self->oid.id, GIT_OID_RAWSZ);
}
PyDoc_STRVAR(Oid_hex__doc__, "Hex oid, a 40 chars long string (type str).\n"
"This attribute is deprecated, please use the built-int str() or unicode()\n");
PyObject *
Oid_hex__get__(Oid *self)
{
return Oid__str__(self);
}
PyGetSetDef Oid_getseters[] = {
GETTER(Oid, raw),
GETTER(Oid, hex),
{NULL},
};
PyDoc_STRVAR(Oid__doc__, "Object id.");
PyTypeObject OidType = {
PyVarObject_HEAD_INIT(NULL, 0)
"_pygit2.Oid", /* tp_name */
sizeof(Oid), /* tp_basicsize */
0, /* tp_itemsize */
0, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
(reprfunc)Oid__str__, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
(hashfunc)Oid_hash, /* tp_hash */
0, /* tp_call */
(reprfunc)Oid__str__, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
Oid__doc__, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
(richcmpfunc)Oid_richcompare, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
Oid_getseters, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)Oid_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
};