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utils.c
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/*
* Copyright 2010-2021 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;
/**
* Return a *newly allocated* C string holding the string contained in the
* 'value' argument.
*/
char *
pgit_encode(PyObject *value, const char *encoding)
{
PyObject *tmp = NULL;
const char *borrowed = pgit_borrow_encoding(value, encoding, NULL, &tmp);
if (!borrowed)
return NULL;
char *c_str = strdup(borrowed);
Py_DECREF(tmp);
if (!c_str) {
// FIXME Set exception
}
return c_str;
}
char*
pgit_encode_fsdefault(PyObject *value)
{
return pgit_encode(value, Py_FileSystemDefaultEncoding);
}
/**
* 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*
pgit_borrow_encoding(PyObject *value, const char *encoding, const char *errors, PyObject **tvalue)
{
PyObject *py_value = NULL;
PyObject *py_str = NULL;
py_value = PyOS_FSPath(value);
if (py_value == NULL) {
Error_type_error("unexpected %.200s", value);
return NULL;
}
// Get new PyBytes reference from value
if (PyUnicode_Check(py_value)) { // Text string
py_str = PyUnicode_AsEncodedString(
py_value,
encoding ? encoding : "utf-8",
errors ? errors : "strict"
);
Py_DECREF(py_value);
if (py_str == NULL)
return NULL;
} else if (PyBytes_Check(py_value)) { // Byte string
py_str = py_value;
} else { // Type error
Error_type_error("unexpected %.200s", value);
Py_DECREF(py_value);
return NULL;
}
// Borrow c string from the new PyBytes reference
char *c_str = PyBytes_AsString(py_str);
if (c_str == NULL) {
Py_DECREF(py_str);
return NULL;
}
// Return the borrowed c string and the new PyBytes reference
*tvalue = py_str;
return c_str;
}
/**
* Return a borrowed c string with the representation of the given Unicode or
* Bytes object:
* - If value is Unicode return the UTF-8 representation
* - If value is Bytes return the raw sttring
* In both cases the returned string is owned by value and must not be
* modified, nor freed.
*/
const char*
pgit_borrow(PyObject *value)
{
if (PyUnicode_Check(value)) { // Text string
return PyUnicode_AsUTF8(value);
} else if (PyBytes_Check(value)) { // Byte string
return PyBytes_AsString(value);
}
// 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 = pgit_encode(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 (PyLong_Check(py_type)) {
value = PyLong_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 */
}