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utils.c
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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 "error.h"
#include "utils.h"
extern PyTypeObject ReferenceType;
extern PyTypeObject TreeType;
extern PyTypeObject CommitType;
extern PyTypeObject BlobType;
extern PyTypeObject TagType;
/**
* py_str_to_c_str() returns a newly allocated C string holding the string
* contained in the 'value' argument.
*/
char *
py_str_to_c_str(PyObject *value, const char *encoding)
{
const char *borrowed;
char *c_str = NULL;
PyObject *tmp = NULL;
borrowed = py_str_borrow_c_str(&tmp, value, encoding);
if (!borrowed)
return NULL;
c_str = strdup(borrowed);
Py_DECREF(tmp);
return c_str;
}
/**
* Return a pointer to the underlying C string in 'value'. The pointer is
* guaranteed by 'tvalue'. Decrease its refcount when done with the string.
*/
const char *
py_str_borrow_c_str(PyObject **tvalue, PyObject *value, const char *encoding)
{
/* Case 1: byte string */
if (PyBytes_Check(value)) {
Py_INCREF(value);
*tvalue = value;
return PyBytes_AsString(value);
}
/* Case 2: text string */
if (PyUnicode_Check(value)) {
if (encoding == NULL)
*tvalue = PyUnicode_AsUTF8String(value);
else
*tvalue = PyUnicode_AsEncodedString(value, encoding, "strict");
if (*tvalue == NULL)
return NULL;
return PyBytes_AsString(*tvalue);
}
/* Type error */
Error_type_error("unexpected %.200s", value);
return NULL;
}
/**
* Converts the (struct) git_strarray to a Python list
*/
PyObject *
get_pylist_from_git_strarray(git_strarray *strarray)
{
size_t index;
PyObject *new_list;
new_list = PyList_New(strarray->count);
if (new_list == NULL)
return NULL;
for (index = 0; index < strarray->count; index++)
PyList_SET_ITEM(new_list, index,
to_unicode(strarray->strings[index], NULL, NULL));
return new_list;
}
/**
* Converts the Python list to struct git_strarray
* returns -1 if conversion failed
*/
int
get_strarraygit_from_pylist(git_strarray *array, PyObject *pylist)
{
Py_ssize_t index, n;
PyObject *item;
void *ptr;
char *str;
if (!PyList_Check(pylist)) {
PyErr_SetString(PyExc_TypeError, "Value must be a list");
return -1;
}
n = PyList_Size(pylist);
/* allocate new git_strarray */
ptr = calloc(n, sizeof(char *));
if (!ptr) {
PyErr_SetNone(PyExc_MemoryError);
return -1;
}
array->strings = ptr;
array->count = n;
for (index = 0; index < n; index++) {
item = PyList_GetItem(pylist, index);
str = py_str_to_c_str(item, NULL);
if (!str)
goto on_error;
array->strings[index] = str;
}
return 0;
on_error:
n = index;
for (index = 0; index < n; index++) {
free(array->strings[index]);
}
free(array->strings);
return -1;
}
static git_otype
py_type_to_git_type(PyTypeObject *py_type)
{
if (py_type == &CommitType)
return GIT_OBJ_COMMIT;
else if (py_type == &TreeType)
return GIT_OBJ_TREE;
else if (py_type == &BlobType)
return GIT_OBJ_BLOB;
else if (py_type == &TagType)
return GIT_OBJ_TAG;
PyErr_SetString(PyExc_ValueError, "invalid target type");
return GIT_OBJ_BAD; /* -1 */
}
git_otype
py_object_to_otype(PyObject *py_type)
{
long value;
if (py_type == Py_None)
return GIT_OBJ_ANY;
if (PyInt_Check(py_type)) {
value = PyInt_AsLong(py_type);
if (value == -1 && PyErr_Occurred())
return GIT_OBJ_BAD;
/* TODO Check whether the value is a valid value */
return (git_otype)value;
}
if (PyType_Check(py_type))
return py_type_to_git_type((PyTypeObject *) py_type);
PyErr_SetString(PyExc_ValueError, "invalid target type");
return GIT_OBJ_BAD; /* -1 */
}