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-rw-r--r--Modules/arraymodule.c117
1 files changed, 75 insertions, 42 deletions
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
index 8e8dce2..656fc09 100644
--- a/Modules/arraymodule.c
+++ b/Modules/arraymodule.c
@@ -26,6 +26,7 @@ struct arraydescr {
int itemsize;
PyObject * (*getitem)(struct arrayobject *, Py_ssize_t);
int (*setitem)(struct arrayobject *, Py_ssize_t, PyObject *);
+ const char *formats;
};
typedef struct arrayobject {
@@ -34,10 +35,19 @@ typedef struct arrayobject {
Py_ssize_t allocated;
struct arraydescr *ob_descr;
PyObject *weakreflist; /* List of weak references */
+ int ob_exports; /* Number of exported buffers */
} arrayobject;
static PyTypeObject Arraytype;
+#ifdef Py_UNICODE_WIDE
+#define PyArr_UNI 'w'
+/*static const char *PyArr_UNISTR = "w"; */
+#else
+#define PyArr_UNI 'u'
+/*static const char *PyArr_UNISTR = "u"; */
+#endif
+
#define array_Check(op) PyObject_TypeCheck(op, &Arraytype)
#define array_CheckExact(op) (Py_Type(op) == &Arraytype)
@@ -59,6 +69,12 @@ array_resize(arrayobject *self, Py_ssize_t newsize)
return 0;
}
+ if (self->ob_exports > 0) {
+ PyErr_SetString(PyExc_BufferError,
+ "cannot resize an array that is exporting data");
+ return -1;
+ }
+
/* This over-allocates proportional to the array size, making room
* for additional growth. The over-allocation is mild, but is
* enough to give linear-time amortized behavior over a long
@@ -370,11 +386,12 @@ d_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
return 0;
}
+
/* Description of types */
static struct arraydescr descriptors[] = {
{'b', sizeof(char), b_getitem, b_setitem},
{'B', sizeof(char), BB_getitem, BB_setitem},
- {'u', sizeof(Py_UNICODE), u_getitem, u_setitem},
+ {PyArr_UNI, sizeof(Py_UNICODE), u_getitem, u_setitem},
{'h', sizeof(short), h_getitem, h_setitem},
{'H', sizeof(short), HH_getitem, HH_setitem},
{'i', sizeof(int), i_getitem, i_setitem},
@@ -424,6 +441,7 @@ newarrayobject(PyTypeObject *type, Py_ssize_t size, struct arraydescr *descr)
op->ob_descr = descr;
op->allocated = size;
op->weakreflist = NULL;
+ op->ob_exports = 0;
return (PyObject *) op;
}
@@ -1403,10 +1421,10 @@ array_fromunicode(arrayobject *self, PyObject *args)
if (!PyArg_ParseTuple(args, "u#:fromunicode", &ustr, &n))
return NULL;
- if (self->ob_descr->typecode != 'u') {
+ if (self->ob_descr->typecode != PyArr_UNI) {
PyErr_SetString(PyExc_ValueError,
"fromunicode() may only be called on "
- "type 'u' arrays");
+ "unicode type arrays");
return NULL;
}
if (n > 0) {
@@ -1431,7 +1449,7 @@ PyDoc_STRVAR(fromunicode_doc,
"fromunicode(ustr)\n\
\n\
Extends this array with data from the unicode string ustr.\n\
-The array must be a type 'u' array; otherwise a ValueError\n\
+The array must be a unicode type array; otherwise a ValueError\n\
is raised. Use array.fromstring(ustr.decode(...)) to\n\
append Unicode data to an array of some other type.");
@@ -1439,9 +1457,9 @@ append Unicode data to an array of some other type.");
static PyObject *
array_tounicode(arrayobject *self, PyObject *unused)
{
- if (self->ob_descr->typecode != 'u') {
+ if (self->ob_descr->typecode != PyArr_UNI) {
PyErr_SetString(PyExc_ValueError,
- "tounicode() may only be called on type 'u' arrays");
+ "tounicode() may only be called on unicode type arrays");
return NULL;
}
return PyUnicode_FromUnicode((Py_UNICODE *) self->ob_item, Py_Size(self));
@@ -1451,7 +1469,7 @@ PyDoc_STRVAR(tounicode_doc,
"tounicode() -> unicode\n\
\n\
Convert the array to a unicode string. The array must be\n\
-a type 'u' array; otherwise a ValueError is raised. Use\n\
+a unicode type array; otherwise a ValueError is raised. Use\n\
array.tostring().decode() to obtain a unicode string from\n\
an array of some other type.");
@@ -1542,7 +1560,7 @@ array_repr(arrayobject *a)
if (len == 0) {
return PyUnicode_FromFormat("array('%c')", typecode);
}
- if (typecode == 'u')
+ if (typecode == PyArr_UNI)
v = array_tounicode(a, NULL);
else
v = array_tolist(a, NULL);
@@ -1720,40 +1738,56 @@ static PyMappingMethods array_as_mapping = {
static const void *emptybuf = "";
-static Py_ssize_t
-array_buffer_getreadbuf(arrayobject *self, Py_ssize_t index, const void **ptr)
-{
- if ( index != 0 ) {
- PyErr_SetString(PyExc_SystemError,
- "Accessing non-existent array segment");
- return -1;
- }
- *ptr = (void *)self->ob_item;
- if (*ptr == NULL)
- *ptr = emptybuf;
- return Py_Size(self)*self->ob_descr->itemsize;
-}
-static Py_ssize_t
-array_buffer_getwritebuf(arrayobject *self, Py_ssize_t index, const void **ptr)
+static int
+array_buffer_getbuf(arrayobject *self, PyBuffer *view, int flags)
{
- if ( index != 0 ) {
- PyErr_SetString(PyExc_SystemError,
- "Accessing non-existent array segment");
- return -1;
- }
- *ptr = (void *)self->ob_item;
- if (*ptr == NULL)
- *ptr = emptybuf;
- return Py_Size(self)*self->ob_descr->itemsize;
+ if ((flags & PyBUF_CHARACTER)) {
+ PyErr_SetString(PyExc_TypeError,
+ "Cannot be a character buffer");
+ return -1;
+ }
+ if ((flags & PyBUF_LOCKDATA)) {
+ PyErr_SetString(PyExc_BufferError,
+ "Cannot lock data");
+ return -1;
+ }
+ if (view==NULL) goto finish;
+
+ view->buf = (void *)self->ob_item;
+ if (view->buf == NULL)
+ view->buf = (void *)emptybuf;
+ view->len = (Py_Size(self)) * self->ob_descr->itemsize;
+ view->readonly = 0;
+ view->ndim = 1;
+ view->itemsize = self->ob_descr->itemsize;
+ view->suboffsets = NULL;
+ view->shape = NULL;
+ if ((flags & PyBUF_ND)==PyBUF_ND) {
+ view->shape = &((Py_Size(self)));
+ }
+ view->strides = NULL;
+ if ((flags & PyBUF_STRIDES)==PyBUF_STRIDES)
+ view->strides = &(view->itemsize);
+ view->format = NULL;
+ view->internal = NULL;
+ if ((flags & PyBUF_FORMAT) == PyBUF_FORMAT) {
+ view->internal = malloc(3);
+ view->format = view->internal;
+ view->format[0] = (char)(self->ob_descr->typecode);
+ view->format[1] = '\0';
+ }
+
+ finish:
+ self->ob_exports++;
+ return 0;
}
-static Py_ssize_t
-array_buffer_getsegcount(arrayobject *self, Py_ssize_t *lenp)
+static void
+array_buffer_relbuf(arrayobject *self, PyBuffer *view)
{
- if ( lenp )
- *lenp = Py_Size(self)*self->ob_descr->itemsize;
- return 1;
+ free(view->internal);
+ self->ob_exports--;
}
static PySequenceMethods array_as_sequence = {
@@ -1770,10 +1804,8 @@ static PySequenceMethods array_as_sequence = {
};
static PyBufferProcs array_as_buffer = {
- (readbufferproc)array_buffer_getreadbuf,
- (writebufferproc)array_buffer_getwritebuf,
- (segcountproc)array_buffer_getsegcount,
- NULL,
+ (getbufferproc)array_buffer_getbuf,
+ (releasebufferproc)array_buffer_relbuf
};
static PyObject *
@@ -1792,7 +1824,7 @@ array_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
if (!(initial == NULL || PyList_Check(initial)
|| PyBytes_Check(initial)
|| PyString_Check(initial) || PyTuple_Check(initial)
- || (c == 'u' && PyUnicode_Check(initial)))) {
+ || (c == PyArr_UNI && PyUnicode_Check(initial)))) {
it = PyObject_GetIter(initial);
if (it == NULL)
return NULL;
@@ -1900,6 +1932,7 @@ is a single character. The following type codes are defined:\n\
'H' unsigned integer 2 \n\
'i' signed integer 2 \n\
'I' unsigned integer 2 \n\
+ 'w' unicode character 4 \n\
'l' signed integer 4 \n\
'L' unsigned integer 4 \n\
'f' floating point 4 \n\
generated by cgit v0.12 at 2024-12-11 21:05:57 (GMT)