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Remove private substring() function, reuse public PyUnicode_Substring() 

* PyUnicode_Substring() now fails if start or end is invalid
 * PyUnicode_Substring() reuses PyUnicode_Copy() for non-exact strings
This commit is contained in:
Victor Stinner 2011-10-01 01:53:49 +02:00
parent c841e7db1f
commit 12bab6dace
1 changed files with 22 additions and 62 deletions
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84
Objects/unicodeobject.c
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@ -282,9 +282,6 @@ make_bloom_mask(int kind, void* ptr, Py_ssize_t len)
/* --- Unicode Object ----------------------------------------------------- */
static PyObject *
substring(PyUnicodeObject *self, Py_ssize_t start, Py_ssize_t len);
static PyObject *
fixup(PyUnicodeObject *self, Py_UCS4 (*fixfct)(PyUnicodeObject *s));
@ -10445,51 +10442,7 @@ _PyUnicode_XStrip(PyUnicodeObject *self, int striptype, PyObject *sepobj)
j++;
}
if (i == 0 && j == len && PyUnicode_CheckExact(self)) {
Py_INCREF(self);
return (PyObject*)self;
}
else
return PyUnicode_Substring((PyObject*)self, i, j);
}
/* Assumes an already ready self string. */
static PyObject *
substring(PyUnicodeObject *self, Py_ssize_t start, Py_ssize_t len)
{
const int kind = PyUnicode_KIND(self);
void *data = PyUnicode_DATA(self);
Py_UCS4 maxchar = 0;
Py_ssize_t i;
PyObject *unicode;
if (start < 0 || len < 0 || (start + len) > PyUnicode_GET_LENGTH(self)) {
PyErr_BadInternalCall();
return NULL;
}
if (len == PyUnicode_GET_LENGTH(self) && PyUnicode_CheckExact(self)) {
Py_INCREF(self);
return (PyObject*)self;
}
for (i = 0; i < len; ++i) {
const Py_UCS4 ch = PyUnicode_READ(kind, data, start + i);
if (ch > maxchar)
maxchar = ch;
}
unicode = PyUnicode_New(len, maxchar);
if (unicode == NULL)
return NULL;
if (PyUnicode_CopyCharacters(unicode, 0,
(PyObject*)self, start, len) < 0)
{
Py_DECREF(unicode);
return NULL;
}
return unicode;
return PyUnicode_Substring((PyObject*)self, i, j);
}
PyObject*
@ -10497,24 +10450,34 @@ PyUnicode_Substring(PyObject *self, Py_ssize_t start, Py_ssize_t end)
{
unsigned char *data;
int kind;
Py_ssize_t length;
if (start == 0 && end == PyUnicode_GET_LENGTH(self)
&& PyUnicode_CheckExact(self))
if (start == 0 && end == PyUnicode_GET_LENGTH(self))
{
Py_INCREF(self);
return (PyObject *)self;
if (PyUnicode_CheckExact(self)) {
Py_INCREF(self);
return self;
}
else
return PyUnicode_Copy(self);
}
if ((end - start) == 1)
length = end - start;
if (length == 1)
return unicode_getitem((PyUnicodeObject*)self, start);
if (start < 0 || end < 0 || end > PyUnicode_GET_LENGTH(self)) {
PyErr_SetString(PyExc_IndexError, "string index out of range");
return NULL;
}
if (PyUnicode_READY(self) == -1)
return NULL;
kind = PyUnicode_KIND(self);
data = PyUnicode_1BYTE_DATA(self);
return PyUnicode_FromKindAndData(kind,
data + PyUnicode_KIND_SIZE(kind, start),
end-start);
length);
}
static PyObject *
@ -10546,12 +10509,7 @@ do_strip(PyUnicodeObject *self, int striptype)
j++;
}
if (i == 0 && j == len && PyUnicode_CheckExact(self)) {
Py_INCREF(self);
return (PyObject*)self;
}
else
return substring(self, i, j-i);
return PyUnicode_Substring((PyObject*)self, i, j);
}
@ -11814,7 +11772,8 @@ unicode_subscript(PyUnicodeObject* self, PyObject* item)
Py_INCREF(self);
return (PyObject *)self;
} else if (step == 1) {
return substring(self, start, slicelength);
return PyUnicode_Substring((PyObject*)self,
start, start + slicelength);
} else {
source_buf = PyUnicode_AS_UNICODE((PyObject*)self);
result_buf = (Py_UNICODE *)PyObject_MALLOC(slicelength*
@ -12051,7 +12010,8 @@ PyUnicode_Format(PyObject *format, PyObject *args)
"incomplete format key");
goto onError;
}
key = substring(uformat, keystart, keylen);
key = PyUnicode_Substring((PyObject*)uformat,
keystart, keystart + keylen);
if (key == NULL)
goto onError;
if (args_owned) {