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Port import_module_level to Unicode API.

This commit is contained in:
Martin v. Löwis 2011-10-30 23:50:02 +01:00
parent 5d12faa5b8
commit f45dee998f
1 changed files with 62 additions and 104 deletions
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166
Python/import.c
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@ -2753,8 +2753,7 @@ static PyObject *get_parent(PyObject *globals,
int level);
static PyObject *load_next(PyObject *mod, PyObject *altmod,
PyObject *inputname, PyObject **p_outputname,
Py_UCS4 *buf, Py_ssize_t *p_buflen,
Py_ssize_t bufsize);
PyObject **p_prefix);
static int mark_miss(PyObject *name);
static int ensure_fromlist(PyObject *mod, PyObject *fromlist,
PyObject *buf, int recursive);
@ -2767,11 +2766,11 @@ static PyObject *
import_module_level(PyObject *name, PyObject *globals, PyObject *locals,
PyObject *fromlist, int level)
{
Py_UCS4 buf[MAXPATHLEN+1];
Py_ssize_t buflen;
Py_ssize_t bufsize = MAXPATHLEN+1;
PyObject *parent, *head, *next, *tail, *inputname, *outputname;
PyObject *parent_name, *ensure_name;
PyObject *parent, *next, *inputname, *outputname;
PyObject *head = NULL;
PyObject *tail = NULL;
PyObject *prefix = NULL;
PyObject *result = NULL;
Py_ssize_t sep, altsep;
if (PyUnicode_READY(name))
@ -2794,26 +2793,18 @@ import_module_level(PyObject *name, PyObject *globals, PyObject *locals,
return NULL;
}
parent = get_parent(globals, &parent_name, level);
parent = get_parent(globals, &prefix, level);
if (parent == NULL) {
return NULL;
}
if (PyUnicode_READY(parent_name))
if (PyUnicode_READY(prefix))
return NULL;
buflen = PyUnicode_GET_LENGTH(parent_name);
if (!PyUnicode_AsUCS4(parent_name, buf, Py_ARRAY_LENGTH(buf), 1)) {
Py_DECREF(parent_name);
PyErr_SetString(PyExc_ValueError,
"Module name too long");
return NULL;
}
Py_DECREF(parent_name);
head = load_next(parent, level < 0 ? Py_None : parent, name, &outputname,
buf, &buflen, bufsize);
&prefix);
if (head == NULL)
return NULL;
goto out;
tail = head;
Py_INCREF(tail);
@ -2822,13 +2813,11 @@ import_module_level(PyObject *name, PyObject *globals, PyObject *locals,
while (1) {
inputname = outputname;
next = load_next(tail, tail, inputname, &outputname,
buf, &buflen, bufsize);
Py_DECREF(tail);
Py_DECREF(inputname);
if (next == NULL) {
Py_DECREF(head);
return NULL;
}
&prefix);
Py_CLEAR(tail);
Py_CLEAR(inputname);
if (next == NULL)
goto out;
tail = next;
if (outputname == NULL) {
@ -2840,10 +2829,8 @@ import_module_level(PyObject *name, PyObject *globals, PyObject *locals,
/* If tail is Py_None, both get_parent and load_next found
an empty module name: someone called __import__("") or
doctored faulty bytecode */
Py_DECREF(tail);
Py_DECREF(head);
PyErr_SetString(PyExc_ValueError, "Empty module name");
return NULL;
goto out;
}
if (fromlist != NULL) {
@ -2852,26 +2839,21 @@ import_module_level(PyObject *name, PyObject *globals, PyObject *locals,
}
if (fromlist == NULL) {
Py_DECREF(tail);
return head;
result = head;
Py_INCREF(result);
goto out;
}
Py_DECREF(head);
ensure_name = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND,
buf, Py_UCS4_strlen(buf));
if (ensure_name == NULL) {
Py_DECREF(tail);
return NULL;
}
if (!ensure_fromlist(tail, fromlist, ensure_name, 0)) {
Py_DECREF(tail);
Py_DECREF(ensure_name);
return NULL;
}
Py_DECREF(ensure_name);
return tail;
if (!ensure_fromlist(tail, fromlist, prefix, 0))
goto out;
result = tail;
Py_INCREF(result);
out:
Py_XDECREF(head);
Py_XDECREF(tail);
Py_XDECREF(prefix);
return result;
}
PyObject *
@ -3083,91 +3065,67 @@ return_none:
static PyObject *
load_next(PyObject *mod, PyObject *altmod,
PyObject *inputname, PyObject **p_outputname,
Py_UCS4 *buf, Py_ssize_t *p_buflen, Py_ssize_t bufsize)
PyObject **p_prefix)
{
Py_UCS4 *dot;
Py_ssize_t dot;
Py_ssize_t len;
Py_UCS4 *p;
PyObject *fullname, *name, *result, *mark_name;
Py_UCS4 *nameuni;
PyObject *fullname, *name = NULL, *result;
*p_outputname = NULL;
if (PyUnicode_GET_LENGTH(inputname) == 0) {
len = PyUnicode_GET_LENGTH(inputname);
if (len == 0) {
/* completely empty module name should only happen in
'from . import' (or '__import__("")')*/
Py_INCREF(mod);
return mod;
}
nameuni = PyUnicode_AsUCS4Copy(inputname);
if (nameuni == NULL)
return NULL;
dot = Py_UCS4_strchr(nameuni, '.');
if (dot != NULL) {
len = dot - nameuni;
dot = PyUnicode_FindChar(inputname, '.', 0, len, 1);
if (dot >= 0) {
len = dot;
if (len == 0) {
PyErr_SetString(PyExc_ValueError,
"Empty module name");
goto error;
}
}
else
len = PyUnicode_GET_LENGTH(inputname);
if (*p_buflen+len+1 >= bufsize) {
PyErr_SetString(PyExc_ValueError,
"Module name too long");
/* name = inputname[:len] */
name = PyUnicode_Substring(inputname, 0, len);
if (name == NULL)
goto error;
if (PyUnicode_GET_LENGTH(*p_prefix)) {
/* fullname = prefix + "." + name */
fullname = PyUnicode_FromFormat("%U.%U", *p_prefix, name);
if (fullname == NULL)
goto error;
}
else {
fullname = name;
Py_INCREF(fullname);
}
p = buf + *p_buflen;
if (p != buf) {
*p++ = '.';
*p_buflen += 1;
}
Py_UCS4_strncpy(p, nameuni, len);
p[len] = '\0';
*p_buflen += len;
fullname = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND,
buf, *p_buflen);
if (fullname == NULL)
goto error;
name = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND,
p, len);
if (name == NULL) {
Py_DECREF(fullname);
goto error;
}
result = import_submodule(mod, name, fullname);
Py_DECREF(fullname);
Py_DECREF(*p_prefix);
/* Transfer reference. */
*p_prefix = fullname;
if (result == Py_None && altmod != mod) {
Py_DECREF(result);
/* Here, altmod must be None and mod must not be None */
result = import_submodule(altmod, name, name);
Py_DECREF(name);
if (result != NULL && result != Py_None) {
mark_name = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND,
buf, *p_buflen);
if (mark_name == NULL) {
if (mark_miss(*p_prefix) != 0) {
Py_DECREF(result);
goto error;
}
if (mark_miss(mark_name) != 0) {
Py_DECREF(result);
Py_DECREF(mark_name);
goto error;
}
Py_DECREF(mark_name);
Py_UCS4_strncpy(buf, nameuni, len);
buf[len] = '\0';
*p_buflen = len;
Py_DECREF(*p_prefix);
*p_prefix = name;
Py_INCREF(*p_prefix);
}
}
else
Py_DECREF(name);
if (result == NULL)
goto error;
@ -3178,20 +3136,20 @@ load_next(PyObject *mod, PyObject *altmod,
goto error;
}
if (dot != NULL) {
*p_outputname = PyUnicode_FromKindAndData(PyUnicode_4BYTE_KIND,
dot+1, Py_UCS4_strlen(dot+1));
if (dot >= 0) {
*p_outputname = PyUnicode_Substring(inputname, dot+1,
PyUnicode_GET_LENGTH(inputname));
if (*p_outputname == NULL) {
Py_DECREF(result);
goto error;
}
}
PyMem_Free(nameuni);
Py_DECREF(name);
return result;
error:
PyMem_Free(nameuni);
Py_XDECREF(name);
return NULL;
}