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2304 lines
65 KiB
2304 lines
65 KiB
/* Array object implementation */
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/* An array is a uniform list -- all items have the same type.
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The item type is restricted to simple C types like int or float */
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#define PY_SSIZE_T_CLEAN
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#include "Python.h"
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#include "structmember.h"
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#ifdef STDC_HEADERS
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#include <stddef.h>
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#else /* !STDC_HEADERS */
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h> /* For size_t */
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#endif /* HAVE_SYS_TYPES_H */
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#endif /* !STDC_HEADERS */
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struct arrayobject; /* Forward */
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/* All possible arraydescr values are defined in the vector "descriptors"
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* below. That's defined later because the appropriate get and set
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* functions aren't visible yet.
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*/
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struct arraydescr {
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int typecode;
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int itemsize;
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PyObject * (*getitem)(struct arrayobject *, Py_ssize_t);
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int (*setitem)(struct arrayobject *, Py_ssize_t, PyObject *);
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};
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typedef struct arrayobject {
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PyObject_VAR_HEAD
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char *ob_item;
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Py_ssize_t allocated;
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struct arraydescr *ob_descr;
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PyObject *weakreflist; /* List of weak references */
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} arrayobject;
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static PyTypeObject Arraytype;
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#define array_Check(op) PyObject_TypeCheck(op, &Arraytype)
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#define array_CheckExact(op) (Py_TYPE(op) == &Arraytype)
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static int
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array_resize(arrayobject *self, Py_ssize_t newsize)
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{
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char *items;
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size_t _new_size;
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/* Bypass realloc() when a previous overallocation is large enough
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to accommodate the newsize. If the newsize is 16 smaller than the
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current size, then proceed with the realloc() to shrink the list.
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*/
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if (self->allocated >= newsize &&
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Py_SIZE(self) < newsize + 16 &&
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self->ob_item != NULL) {
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Py_SIZE(self) = newsize;
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return 0;
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}
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/* This over-allocates proportional to the array size, making room
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* for additional growth. The over-allocation is mild, but is
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* enough to give linear-time amortized behavior over a long
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* sequence of appends() in the presence of a poorly-performing
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* system realloc().
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* The growth pattern is: 0, 4, 8, 16, 25, 34, 46, 56, 67, 79, ...
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* Note, the pattern starts out the same as for lists but then
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* grows at a smaller rate so that larger arrays only overallocate
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* by about 1/16th -- this is done because arrays are presumed to be more
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* memory critical.
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*/
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_new_size = (newsize >> 4) + (Py_SIZE(self) < 8 ? 3 : 7) + newsize;
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items = self->ob_item;
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/* XXX The following multiplication and division does not optimize away
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like it does for lists since the size is not known at compile time */
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if (_new_size <= ((~(size_t)0) / self->ob_descr->itemsize))
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PyMem_RESIZE(items, char, (_new_size * self->ob_descr->itemsize));
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else
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items = NULL;
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if (items == NULL) {
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PyErr_NoMemory();
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return -1;
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}
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self->ob_item = items;
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Py_SIZE(self) = newsize;
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self->allocated = _new_size;
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return 0;
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}
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/****************************************************************************
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Get and Set functions for each type.
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A Get function takes an arrayobject* and an integer index, returning the
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array value at that index wrapped in an appropriate PyObject*.
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A Set function takes an arrayobject, integer index, and PyObject*; sets
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the array value at that index to the raw C data extracted from the PyObject*,
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and returns 0 if successful, else nonzero on failure (PyObject* not of an
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appropriate type or value).
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Note that the basic Get and Set functions do NOT check that the index is
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in bounds; that's the responsibility of the caller.
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****************************************************************************/
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static PyObject *
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c_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyString_FromStringAndSize(&((char *)ap->ob_item)[i], 1);
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}
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static int
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c_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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char x;
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if (!PyArg_Parse(v, "c;array item must be char", &x))
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return -1;
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if (i >= 0)
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((char *)ap->ob_item)[i] = x;
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return 0;
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}
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static PyObject *
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b_getitem(arrayobject *ap, Py_ssize_t i)
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{
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long x = ((char *)ap->ob_item)[i];
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if (x >= 128)
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x -= 256;
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return PyInt_FromLong(x);
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}
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static int
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b_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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short x;
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/* PyArg_Parse's 'b' formatter is for an unsigned char, therefore
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must use the next size up that is signed ('h') and manually do
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the overflow checking */
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if (!PyArg_Parse(v, "h;array item must be integer", &x))
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return -1;
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else if (x < -128) {
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PyErr_SetString(PyExc_OverflowError,
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"signed char is less than minimum");
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return -1;
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}
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else if (x > 127) {
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PyErr_SetString(PyExc_OverflowError,
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"signed char is greater than maximum");
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return -1;
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}
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if (i >= 0)
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((char *)ap->ob_item)[i] = (char)x;
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return 0;
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}
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static PyObject *
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BB_getitem(arrayobject *ap, Py_ssize_t i)
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{
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long x = ((unsigned char *)ap->ob_item)[i];
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return PyInt_FromLong(x);
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}
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static int
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BB_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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unsigned char x;
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/* 'B' == unsigned char, maps to PyArg_Parse's 'b' formatter */
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if (!PyArg_Parse(v, "b;array item must be integer", &x))
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return -1;
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if (i >= 0)
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((char *)ap->ob_item)[i] = x;
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return 0;
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}
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#ifdef Py_USING_UNICODE
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static PyObject *
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u_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyUnicode_FromUnicode(&((Py_UNICODE *) ap->ob_item)[i], 1);
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}
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static int
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u_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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Py_UNICODE *p;
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Py_ssize_t len;
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if (!PyArg_Parse(v, "u#;array item must be unicode character", &p, &len))
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return -1;
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if (len != 1) {
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PyErr_SetString(PyExc_TypeError,
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"array item must be unicode character");
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return -1;
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}
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if (i >= 0)
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((Py_UNICODE *)ap->ob_item)[i] = p[0];
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return 0;
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}
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#endif
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static PyObject *
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h_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyInt_FromLong((long) ((short *)ap->ob_item)[i]);
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}
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static int
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h_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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short x;
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/* 'h' == signed short, maps to PyArg_Parse's 'h' formatter */
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if (!PyArg_Parse(v, "h;array item must be integer", &x))
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return -1;
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if (i >= 0)
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((short *)ap->ob_item)[i] = x;
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return 0;
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}
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static PyObject *
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HH_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyInt_FromLong((long) ((unsigned short *)ap->ob_item)[i]);
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}
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static int
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HH_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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int x;
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/* PyArg_Parse's 'h' formatter is for a signed short, therefore
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must use the next size up and manually do the overflow checking */
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if (!PyArg_Parse(v, "i;array item must be integer", &x))
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return -1;
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else if (x < 0) {
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PyErr_SetString(PyExc_OverflowError,
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"unsigned short is less than minimum");
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return -1;
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}
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else if (x > USHRT_MAX) {
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PyErr_SetString(PyExc_OverflowError,
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"unsigned short is greater than maximum");
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return -1;
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}
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if (i >= 0)
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((short *)ap->ob_item)[i] = (short)x;
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return 0;
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}
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static PyObject *
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i_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyInt_FromLong((long) ((int *)ap->ob_item)[i]);
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}
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static int
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i_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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int x;
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/* 'i' == signed int, maps to PyArg_Parse's 'i' formatter */
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if (!PyArg_Parse(v, "i;array item must be integer", &x))
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return -1;
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if (i >= 0)
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((int *)ap->ob_item)[i] = x;
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return 0;
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}
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static PyObject *
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II_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyLong_FromUnsignedLong(
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(unsigned long) ((unsigned int *)ap->ob_item)[i]);
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}
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static int
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II_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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unsigned long x;
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if (PyLong_Check(v)) {
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x = PyLong_AsUnsignedLong(v);
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if (x == (unsigned long) -1 && PyErr_Occurred())
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return -1;
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}
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else {
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long y;
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if (!PyArg_Parse(v, "l;array item must be integer", &y))
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return -1;
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if (y < 0) {
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PyErr_SetString(PyExc_OverflowError,
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"unsigned int is less than minimum");
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return -1;
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}
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x = (unsigned long)y;
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}
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if (x > UINT_MAX) {
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PyErr_SetString(PyExc_OverflowError,
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"unsigned int is greater than maximum");
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return -1;
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}
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if (i >= 0)
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((unsigned int *)ap->ob_item)[i] = (unsigned int)x;
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return 0;
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}
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static PyObject *
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l_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyInt_FromLong(((long *)ap->ob_item)[i]);
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}
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static int
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l_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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long x;
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if (!PyArg_Parse(v, "l;array item must be integer", &x))
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return -1;
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if (i >= 0)
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((long *)ap->ob_item)[i] = x;
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return 0;
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}
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static PyObject *
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LL_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyLong_FromUnsignedLong(((unsigned long *)ap->ob_item)[i]);
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}
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static int
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LL_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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unsigned long x;
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if (PyLong_Check(v)) {
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x = PyLong_AsUnsignedLong(v);
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if (x == (unsigned long) -1 && PyErr_Occurred())
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return -1;
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}
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else {
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long y;
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if (!PyArg_Parse(v, "l;array item must be integer", &y))
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return -1;
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if (y < 0) {
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PyErr_SetString(PyExc_OverflowError,
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"unsigned long is less than minimum");
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return -1;
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}
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x = (unsigned long)y;
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}
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if (x > ULONG_MAX) {
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PyErr_SetString(PyExc_OverflowError,
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"unsigned long is greater than maximum");
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return -1;
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}
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if (i >= 0)
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((unsigned long *)ap->ob_item)[i] = x;
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return 0;
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}
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static PyObject *
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f_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyFloat_FromDouble((double) ((float *)ap->ob_item)[i]);
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}
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static int
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f_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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float x;
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if (!PyArg_Parse(v, "f;array item must be float", &x))
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return -1;
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if (i >= 0)
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((float *)ap->ob_item)[i] = x;
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return 0;
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}
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static PyObject *
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d_getitem(arrayobject *ap, Py_ssize_t i)
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{
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return PyFloat_FromDouble(((double *)ap->ob_item)[i]);
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}
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static int
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d_setitem(arrayobject *ap, Py_ssize_t i, PyObject *v)
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{
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double x;
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if (!PyArg_Parse(v, "d;array item must be float", &x))
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return -1;
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if (i >= 0)
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((double *)ap->ob_item)[i] = x;
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return 0;
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}
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/* Description of types */
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static struct arraydescr descriptors[] = {
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{'c', sizeof(char), c_getitem, c_setitem},
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{'b', sizeof(char), b_getitem, b_setitem},
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{'B', sizeof(char), BB_getitem, BB_setitem},
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#ifdef Py_USING_UNICODE
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{'u', sizeof(Py_UNICODE), u_getitem, u_setitem},
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#endif
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{'h', sizeof(short), h_getitem, h_setitem},
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{'H', sizeof(short), HH_getitem, HH_setitem},
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{'i', sizeof(int), i_getitem, i_setitem},
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{'I', sizeof(int), II_getitem, II_setitem},
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{'l', sizeof(long), l_getitem, l_setitem},
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{'L', sizeof(long), LL_getitem, LL_setitem},
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{'f', sizeof(float), f_getitem, f_setitem},
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{'d', sizeof(double), d_getitem, d_setitem},
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{'\0', 0, 0, 0} /* Sentinel */
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};
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/****************************************************************************
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Implementations of array object methods.
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****************************************************************************/
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static PyObject *
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newarrayobject(PyTypeObject *type, Py_ssize_t size, struct arraydescr *descr)
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{
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arrayobject *op;
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size_t nbytes;
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if (size < 0) {
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PyErr_BadInternalCall();
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return NULL;
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}
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nbytes = size * descr->itemsize;
|
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/* Check for overflow */
|
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if (nbytes / descr->itemsize != (size_t)size) {
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return PyErr_NoMemory();
|
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}
|
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op = (arrayobject *) type->tp_alloc(type, 0);
|
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if (op == NULL) {
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return NULL;
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}
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op->ob_descr = descr;
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op->allocated = size;
|
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op->weakreflist = NULL;
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Py_SIZE(op) = size;
|
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if (size <= 0) {
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op->ob_item = NULL;
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}
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else {
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op->ob_item = PyMem_NEW(char, nbytes);
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if (op->ob_item == NULL) {
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Py_DECREF(op);
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return PyErr_NoMemory();
|
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}
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}
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return (PyObject *) op;
|
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}
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|
|
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static PyObject *
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getarrayitem(PyObject *op, Py_ssize_t i)
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{
|
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register arrayobject *ap;
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assert(array_Check(op));
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ap = (arrayobject *)op;
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assert(i>=0 && i<Py_SIZE(ap));
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return (*ap->ob_descr->getitem)(ap, i);
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}
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|
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static int
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ins1(arrayobject *self, Py_ssize_t where, PyObject *v)
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{
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char *items;
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Py_ssize_t n = Py_SIZE(self);
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if (v == NULL) {
|
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PyErr_BadInternalCall();
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return -1;
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}
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if ((*self->ob_descr->setitem)(self, -1, v) < 0)
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return -1;
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|
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if (array_resize(self, n+1) == -1)
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return -1;
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items = self->ob_item;
|
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if (where < 0) {
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where += n;
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if (where < 0)
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where = 0;
|
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}
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if (where > n)
|
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where = n;
|
|
/* appends don't need to call memmove() */
|
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if (where != n)
|
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memmove(items + (where+1)*self->ob_descr->itemsize,
|
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items + where*self->ob_descr->itemsize,
|
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(n-where)*self->ob_descr->itemsize);
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return (*self->ob_descr->setitem)(self, where, v);
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}
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|
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/* Methods */
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static void
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array_dealloc(arrayobject *op)
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{
|
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if (op->weakreflist != NULL)
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PyObject_ClearWeakRefs((PyObject *) op);
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if (op->ob_item != NULL)
|
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PyMem_DEL(op->ob_item);
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Py_TYPE(op)->tp_free((PyObject *)op);
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}
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|
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static PyObject *
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array_richcompare(PyObject *v, PyObject *w, int op)
|
|
{
|
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arrayobject *va, *wa;
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PyObject *vi = NULL;
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PyObject *wi = NULL;
|
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Py_ssize_t i, k;
|
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PyObject *res;
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|
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if (!array_Check(v) || !array_Check(w)) {
|
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Py_INCREF(Py_NotImplemented);
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return Py_NotImplemented;
|
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}
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|
|
va = (arrayobject *)v;
|
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wa = (arrayobject *)w;
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|
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if (Py_SIZE(va) != Py_SIZE(wa) && (op == Py_EQ || op == Py_NE)) {
|
|
/* Shortcut: if the lengths differ, the arrays differ */
|
|
if (op == Py_EQ)
|
|
res = Py_False;
|
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else
|
|
res = Py_True;
|
|
Py_INCREF(res);
|
|
return res;
|
|
}
|
|
|
|
/* Search for the first index where items are different */
|
|
k = 1;
|
|
for (i = 0; i < Py_SIZE(va) && i < Py_SIZE(wa); i++) {
|
|
vi = getarrayitem(v, i);
|
|
wi = getarrayitem(w, i);
|
|
if (vi == NULL || wi == NULL) {
|
|
Py_XDECREF(vi);
|
|
Py_XDECREF(wi);
|
|
return NULL;
|
|
}
|
|
k = PyObject_RichCompareBool(vi, wi, Py_EQ);
|
|
if (k == 0)
|
|
break; /* Keeping vi and wi alive! */
|
|
Py_DECREF(vi);
|
|
Py_DECREF(wi);
|
|
if (k < 0)
|
|
return NULL;
|
|
}
|
|
|
|
if (k) {
|
|
/* No more items to compare -- compare sizes */
|
|
Py_ssize_t vs = Py_SIZE(va);
|
|
Py_ssize_t ws = Py_SIZE(wa);
|
|
int cmp;
|
|
switch (op) {
|
|
case Py_LT: cmp = vs < ws; break;
|
|
case Py_LE: cmp = vs <= ws; break;
|
|
case Py_EQ: cmp = vs == ws; break;
|
|
case Py_NE: cmp = vs != ws; break;
|
|
case Py_GT: cmp = vs > ws; break;
|
|
case Py_GE: cmp = vs >= ws; break;
|
|
default: return NULL; /* cannot happen */
|
|
}
|
|
if (cmp)
|
|
res = Py_True;
|
|
else
|
|
res = Py_False;
|
|
Py_INCREF(res);
|
|
return res;
|
|
}
|
|
|
|
/* We have an item that differs. First, shortcuts for EQ/NE */
|
|
if (op == Py_EQ) {
|
|
Py_INCREF(Py_False);
|
|
res = Py_False;
|
|
}
|
|
else if (op == Py_NE) {
|
|
Py_INCREF(Py_True);
|
|
res = Py_True;
|
|
}
|
|
else {
|
|
/* Compare the final item again using the proper operator */
|
|
res = PyObject_RichCompare(vi, wi, op);
|
|
}
|
|
Py_DECREF(vi);
|
|
Py_DECREF(wi);
|
|
return res;
|
|
}
|
|
|
|
static Py_ssize_t
|
|
array_length(arrayobject *a)
|
|
{
|
|
return Py_SIZE(a);
|
|
}
|
|
|
|
static PyObject *
|
|
array_item(arrayobject *a, Py_ssize_t i)
|
|
{
|
|
if (i < 0 || i >= Py_SIZE(a)) {
|
|
PyErr_SetString(PyExc_IndexError, "array index out of range");
|
|
return NULL;
|
|
}
|
|
return getarrayitem((PyObject *)a, i);
|
|
}
|
|
|
|
static PyObject *
|
|
array_slice(arrayobject *a, Py_ssize_t ilow, Py_ssize_t ihigh)
|
|
{
|
|
arrayobject *np;
|
|
if (ilow < 0)
|
|
ilow = 0;
|
|
else if (ilow > Py_SIZE(a))
|
|
ilow = Py_SIZE(a);
|
|
if (ihigh < 0)
|
|
ihigh = 0;
|
|
if (ihigh < ilow)
|
|
ihigh = ilow;
|
|
else if (ihigh > Py_SIZE(a))
|
|
ihigh = Py_SIZE(a);
|
|
np = (arrayobject *) newarrayobject(&Arraytype, ihigh - ilow, a->ob_descr);
|
|
if (np == NULL)
|
|
return NULL;
|
|
if (ihigh > ilow) {
|
|
memcpy(np->ob_item, a->ob_item + ilow * a->ob_descr->itemsize,
|
|
(ihigh-ilow) * a->ob_descr->itemsize);
|
|
}
|
|
return (PyObject *)np;
|
|
}
|
|
|
|
static PyObject *
|
|
array_copy(arrayobject *a, PyObject *unused)
|
|
{
|
|
return array_slice(a, 0, Py_SIZE(a));
|
|
}
|
|
|
|
PyDoc_STRVAR(copy_doc,
|
|
"copy(array)\n\
|
|
\n\
|
|
Return a copy of the array.");
|
|
|
|
static PyObject *
|
|
array_concat(arrayobject *a, PyObject *bb)
|
|
{
|
|
Py_ssize_t size;
|
|
arrayobject *np;
|
|
if (!array_Check(bb)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can only append array (not \"%.200s\") to array",
|
|
Py_TYPE(bb)->tp_name);
|
|
return NULL;
|
|
}
|
|
#define b ((arrayobject *)bb)
|
|
if (a->ob_descr != b->ob_descr) {
|
|
PyErr_BadArgument();
|
|
return NULL;
|
|
}
|
|
if (Py_SIZE(a) > PY_SSIZE_T_MAX - Py_SIZE(b)) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
size = Py_SIZE(a) + Py_SIZE(b);
|
|
np = (arrayobject *) newarrayobject(&Arraytype, size, a->ob_descr);
|
|
if (np == NULL) {
|
|
return NULL;
|
|
}
|
|
if (Py_SIZE(a) > 0) {
|
|
memcpy(np->ob_item, a->ob_item, Py_SIZE(a)*a->ob_descr->itemsize);
|
|
}
|
|
if (Py_SIZE(b) > 0) {
|
|
memcpy(np->ob_item + Py_SIZE(a)*a->ob_descr->itemsize,
|
|
b->ob_item, Py_SIZE(b)*b->ob_descr->itemsize);
|
|
}
|
|
return (PyObject *)np;
|
|
#undef b
|
|
}
|
|
|
|
static PyObject *
|
|
array_repeat(arrayobject *a, Py_ssize_t n)
|
|
{
|
|
Py_ssize_t i;
|
|
Py_ssize_t size;
|
|
arrayobject *np;
|
|
char *p;
|
|
Py_ssize_t nbytes;
|
|
if (n < 0)
|
|
n = 0;
|
|
if ((Py_SIZE(a) != 0) && (n > PY_SSIZE_T_MAX / Py_SIZE(a))) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
size = Py_SIZE(a) * n;
|
|
np = (arrayobject *) newarrayobject(&Arraytype, size, a->ob_descr);
|
|
if (np == NULL)
|
|
return NULL;
|
|
if (size == 0)
|
|
return (PyObject *)np;
|
|
p = np->ob_item;
|
|
nbytes = Py_SIZE(a) * a->ob_descr->itemsize;
|
|
for (i = 0; i < n; i++) {
|
|
memcpy(p, a->ob_item, nbytes);
|
|
p += nbytes;
|
|
}
|
|
return (PyObject *) np;
|
|
}
|
|
|
|
static int
|
|
array_ass_slice(arrayobject *a, Py_ssize_t ilow, Py_ssize_t ihigh, PyObject *v)
|
|
{
|
|
char *item;
|
|
Py_ssize_t n; /* Size of replacement array */
|
|
Py_ssize_t d; /* Change in size */
|
|
#define b ((arrayobject *)v)
|
|
if (v == NULL)
|
|
n = 0;
|
|
else if (array_Check(v)) {
|
|
n = Py_SIZE(b);
|
|
if (a == b) {
|
|
/* Special case "a[i:j] = a" -- copy b first */
|
|
int ret;
|
|
v = array_slice(b, 0, n);
|
|
if (!v)
|
|
return -1;
|
|
ret = array_ass_slice(a, ilow, ihigh, v);
|
|
Py_DECREF(v);
|
|
return ret;
|
|
}
|
|
if (b->ob_descr != a->ob_descr) {
|
|
PyErr_BadArgument();
|
|
return -1;
|
|
}
|
|
}
|
|
else {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can only assign array (not \"%.200s\") to array slice",
|
|
Py_TYPE(v)->tp_name);
|
|
return -1;
|
|
}
|
|
if (ilow < 0)
|
|
ilow = 0;
|
|
else if (ilow > Py_SIZE(a))
|
|
ilow = Py_SIZE(a);
|
|
if (ihigh < 0)
|
|
ihigh = 0;
|
|
if (ihigh < ilow)
|
|
ihigh = ilow;
|
|
else if (ihigh > Py_SIZE(a))
|
|
ihigh = Py_SIZE(a);
|
|
item = a->ob_item;
|
|
d = n - (ihigh-ilow);
|
|
if (d < 0) { /* Delete -d items */
|
|
memmove(item + (ihigh+d)*a->ob_descr->itemsize,
|
|
item + ihigh*a->ob_descr->itemsize,
|
|
(Py_SIZE(a)-ihigh)*a->ob_descr->itemsize);
|
|
Py_SIZE(a) += d;
|
|
PyMem_RESIZE(item, char, Py_SIZE(a)*a->ob_descr->itemsize);
|
|
/* Can't fail */
|
|
a->ob_item = item;
|
|
a->allocated = Py_SIZE(a);
|
|
}
|
|
else if (d > 0) { /* Insert d items */
|
|
PyMem_RESIZE(item, char,
|
|
(Py_SIZE(a) + d)*a->ob_descr->itemsize);
|
|
if (item == NULL) {
|
|
PyErr_NoMemory();
|
|
return -1;
|
|
}
|
|
memmove(item + (ihigh+d)*a->ob_descr->itemsize,
|
|
item + ihigh*a->ob_descr->itemsize,
|
|
(Py_SIZE(a)-ihigh)*a->ob_descr->itemsize);
|
|
a->ob_item = item;
|
|
Py_SIZE(a) += d;
|
|
a->allocated = Py_SIZE(a);
|
|
}
|
|
if (n > 0)
|
|
memcpy(item + ilow*a->ob_descr->itemsize, b->ob_item,
|
|
n*b->ob_descr->itemsize);
|
|
return 0;
|
|
#undef b
|
|
}
|
|
|
|
static int
|
|
array_ass_item(arrayobject *a, Py_ssize_t i, PyObject *v)
|
|
{
|
|
if (i < 0 || i >= Py_SIZE(a)) {
|
|
PyErr_SetString(PyExc_IndexError,
|
|
"array assignment index out of range");
|
|
return -1;
|
|
}
|
|
if (v == NULL)
|
|
return array_ass_slice(a, i, i+1, v);
|
|
return (*a->ob_descr->setitem)(a, i, v);
|
|
}
|
|
|
|
static int
|
|
setarrayitem(PyObject *a, Py_ssize_t i, PyObject *v)
|
|
{
|
|
assert(array_Check(a));
|
|
return array_ass_item((arrayobject *)a, i, v);
|
|
}
|
|
|
|
static int
|
|
array_iter_extend(arrayobject *self, PyObject *bb)
|
|
{
|
|
PyObject *it, *v;
|
|
|
|
it = PyObject_GetIter(bb);
|
|
if (it == NULL)
|
|
return -1;
|
|
|
|
while ((v = PyIter_Next(it)) != NULL) {
|
|
if (ins1(self, Py_SIZE(self), v) != 0) {
|
|
Py_DECREF(v);
|
|
Py_DECREF(it);
|
|
return -1;
|
|
}
|
|
Py_DECREF(v);
|
|
}
|
|
Py_DECREF(it);
|
|
if (PyErr_Occurred())
|
|
return -1;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
array_do_extend(arrayobject *self, PyObject *bb)
|
|
{
|
|
Py_ssize_t size;
|
|
char *old_item;
|
|
|
|
if (!array_Check(bb))
|
|
return array_iter_extend(self, bb);
|
|
#define b ((arrayobject *)bb)
|
|
if (self->ob_descr != b->ob_descr) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"can only extend with array of same kind");
|
|
return -1;
|
|
}
|
|
if ((Py_SIZE(self) > PY_SSIZE_T_MAX - Py_SIZE(b)) ||
|
|
((Py_SIZE(self) + Py_SIZE(b)) > PY_SSIZE_T_MAX / self->ob_descr->itemsize)) {
|
|
PyErr_NoMemory();
|
|
return -1;
|
|
}
|
|
size = Py_SIZE(self) + Py_SIZE(b);
|
|
old_item = self->ob_item;
|
|
PyMem_RESIZE(self->ob_item, char, size*self->ob_descr->itemsize);
|
|
if (self->ob_item == NULL) {
|
|
self->ob_item = old_item;
|
|
PyErr_NoMemory();
|
|
return -1;
|
|
}
|
|
if (Py_SIZE(b) > 0) {
|
|
memcpy(self->ob_item + Py_SIZE(self)*self->ob_descr->itemsize,
|
|
b->ob_item, Py_SIZE(b)*b->ob_descr->itemsize);
|
|
}
|
|
Py_SIZE(self) = size;
|
|
self->allocated = size;
|
|
|
|
return 0;
|
|
#undef b
|
|
}
|
|
|
|
static PyObject *
|
|
array_inplace_concat(arrayobject *self, PyObject *bb)
|
|
{
|
|
if (!array_Check(bb)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can only extend array with array (not \"%.200s\")",
|
|
Py_TYPE(bb)->tp_name);
|
|
return NULL;
|
|
}
|
|
if (array_do_extend(self, bb) == -1)
|
|
return NULL;
|
|
Py_INCREF(self);
|
|
return (PyObject *)self;
|
|
}
|
|
|
|
static PyObject *
|
|
array_inplace_repeat(arrayobject *self, Py_ssize_t n)
|
|
{
|
|
char *items, *p;
|
|
Py_ssize_t size, i;
|
|
|
|
if (Py_SIZE(self) > 0) {
|
|
if (n < 0)
|
|
n = 0;
|
|
items = self->ob_item;
|
|
if ((self->ob_descr->itemsize != 0) &&
|
|
(Py_SIZE(self) > PY_SSIZE_T_MAX / self->ob_descr->itemsize)) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
size = Py_SIZE(self) * self->ob_descr->itemsize;
|
|
if (n == 0) {
|
|
PyMem_FREE(items);
|
|
self->ob_item = NULL;
|
|
Py_SIZE(self) = 0;
|
|
self->allocated = 0;
|
|
}
|
|
else {
|
|
if (size > PY_SSIZE_T_MAX / n) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
PyMem_RESIZE(items, char, n * size);
|
|
if (items == NULL)
|
|
return PyErr_NoMemory();
|
|
p = items;
|
|
for (i = 1; i < n; i++) {
|
|
p += size;
|
|
memcpy(p, items, size);
|
|
}
|
|
self->ob_item = items;
|
|
Py_SIZE(self) *= n;
|
|
self->allocated = Py_SIZE(self);
|
|
}
|
|
}
|
|
Py_INCREF(self);
|
|
return (PyObject *)self;
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
ins(arrayobject *self, Py_ssize_t where, PyObject *v)
|
|
{
|
|
if (ins1(self, where, v) != 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
array_count(arrayobject *self, PyObject *v)
|
|
{
|
|
Py_ssize_t count = 0;
|
|
Py_ssize_t i;
|
|
|
|
for (i = 0; i < Py_SIZE(self); i++) {
|
|
PyObject *selfi = getarrayitem((PyObject *)self, i);
|
|
int cmp = PyObject_RichCompareBool(selfi, v, Py_EQ);
|
|
Py_DECREF(selfi);
|
|
if (cmp > 0)
|
|
count++;
|
|
else if (cmp < 0)
|
|
return NULL;
|
|
}
|
|
return PyInt_FromSsize_t(count);
|
|
}
|
|
|
|
PyDoc_STRVAR(count_doc,
|
|
"count(x)\n\
|
|
\n\
|
|
Return number of occurrences of x in the array.");
|
|
|
|
static PyObject *
|
|
array_index(arrayobject *self, PyObject *v)
|
|
{
|
|
Py_ssize_t i;
|
|
|
|
for (i = 0; i < Py_SIZE(self); i++) {
|
|
PyObject *selfi = getarrayitem((PyObject *)self, i);
|
|
int cmp = PyObject_RichCompareBool(selfi, v, Py_EQ);
|
|
Py_DECREF(selfi);
|
|
if (cmp > 0) {
|
|
return PyInt_FromLong((long)i);
|
|
}
|
|
else if (cmp < 0)
|
|
return NULL;
|
|
}
|
|
PyErr_SetString(PyExc_ValueError, "array.index(x): x not in list");
|
|
return NULL;
|
|
}
|
|
|
|
PyDoc_STRVAR(index_doc,
|
|
"index(x)\n\
|
|
\n\
|
|
Return index of first occurrence of x in the array.");
|
|
|
|
static int
|
|
array_contains(arrayobject *self, PyObject *v)
|
|
{
|
|
Py_ssize_t i;
|
|
int cmp;
|
|
|
|
for (i = 0, cmp = 0 ; cmp == 0 && i < Py_SIZE(self); i++) {
|
|
PyObject *selfi = getarrayitem((PyObject *)self, i);
|
|
cmp = PyObject_RichCompareBool(selfi, v, Py_EQ);
|
|
Py_DECREF(selfi);
|
|
}
|
|
return cmp;
|
|
}
|
|
|
|
static PyObject *
|
|
array_remove(arrayobject *self, PyObject *v)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < Py_SIZE(self); i++) {
|
|
PyObject *selfi = getarrayitem((PyObject *)self,i);
|
|
int cmp = PyObject_RichCompareBool(selfi, v, Py_EQ);
|
|
Py_DECREF(selfi);
|
|
if (cmp > 0) {
|
|
if (array_ass_slice(self, i, i+1,
|
|
(PyObject *)NULL) != 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
else if (cmp < 0)
|
|
return NULL;
|
|
}
|
|
PyErr_SetString(PyExc_ValueError, "array.remove(x): x not in list");
|
|
return NULL;
|
|
}
|
|
|
|
PyDoc_STRVAR(remove_doc,
|
|
"remove(x)\n\
|
|
\n\
|
|
Remove the first occurrence of x in the array.");
|
|
|
|
static PyObject *
|
|
array_pop(arrayobject *self, PyObject *args)
|
|
{
|
|
Py_ssize_t i = -1;
|
|
PyObject *v;
|
|
if (!PyArg_ParseTuple(args, "|n:pop", &i))
|
|
return NULL;
|
|
if (Py_SIZE(self) == 0) {
|
|
/* Special-case most common failure cause */
|
|
PyErr_SetString(PyExc_IndexError, "pop from empty array");
|
|
return NULL;
|
|
}
|
|
if (i < 0)
|
|
i += Py_SIZE(self);
|
|
if (i < 0 || i >= Py_SIZE(self)) {
|
|
PyErr_SetString(PyExc_IndexError, "pop index out of range");
|
|
return NULL;
|
|
}
|
|
v = getarrayitem((PyObject *)self,i);
|
|
if (array_ass_slice(self, i, i+1, (PyObject *)NULL) != 0) {
|
|
Py_DECREF(v);
|
|
return NULL;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
PyDoc_STRVAR(pop_doc,
|
|
"pop([i])\n\
|
|
\n\
|
|
Return the i-th element and delete it from the array. i defaults to -1.");
|
|
|
|
static PyObject *
|
|
array_extend(arrayobject *self, PyObject *bb)
|
|
{
|
|
if (array_do_extend(self, bb) == -1)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(extend_doc,
|
|
"extend(array or iterable)\n\
|
|
\n\
|
|
Append items to the end of the array.");
|
|
|
|
static PyObject *
|
|
array_insert(arrayobject *self, PyObject *args)
|
|
{
|
|
Py_ssize_t i;
|
|
PyObject *v;
|
|
if (!PyArg_ParseTuple(args, "nO:insert", &i, &v))
|
|
return NULL;
|
|
return ins(self, i, v);
|
|
}
|
|
|
|
PyDoc_STRVAR(insert_doc,
|
|
"insert(i,x)\n\
|
|
\n\
|
|
Insert a new item x into the array before position i.");
|
|
|
|
|
|
static PyObject *
|
|
array_buffer_info(arrayobject *self, PyObject *unused)
|
|
{
|
|
PyObject *retval = NULL, *v;
|
|
|
|
retval = PyTuple_New(2);
|
|
if (!retval)
|
|
return NULL;
|
|
|
|
v = PyLong_FromVoidPtr(self->ob_item);
|
|
if (v == NULL) {
|
|
Py_DECREF(retval);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(retval, 0, v);
|
|
|
|
v = PyInt_FromSsize_t(Py_SIZE(self));
|
|
if (v == NULL) {
|
|
Py_DECREF(retval);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(retval, 1, v);
|
|
|
|
return retval;
|
|
}
|
|
|
|
PyDoc_STRVAR(buffer_info_doc,
|
|
"buffer_info() -> (address, length)\n\
|
|
\n\
|
|
Return a tuple (address, length) giving the current memory address and\n\
|
|
the length in items of the buffer used to hold array's contents\n\
|
|
The length should be multiplied by the itemsize attribute to calculate\n\
|
|
the buffer length in bytes.");
|
|
|
|
|
|
static PyObject *
|
|
array_append(arrayobject *self, PyObject *v)
|
|
{
|
|
return ins(self, Py_SIZE(self), v);
|
|
}
|
|
|
|
PyDoc_STRVAR(append_doc,
|
|
"append(x)\n\
|
|
\n\
|
|
Append new value x to the end of the array.");
|
|
|
|
|
|
static PyObject *
|
|
array_byteswap(arrayobject *self, PyObject *unused)
|
|
{
|
|
char *p;
|
|
Py_ssize_t i;
|
|
|
|
switch (self->ob_descr->itemsize) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
for (p = self->ob_item, i = Py_SIZE(self); --i >= 0; p += 2) {
|
|
char p0 = p[0];
|
|
p[0] = p[1];
|
|
p[1] = p0;
|
|
}
|
|
break;
|
|
case 4:
|
|
for (p = self->ob_item, i = Py_SIZE(self); --i >= 0; p += 4) {
|
|
char p0 = p[0];
|
|
char p1 = p[1];
|
|
p[0] = p[3];
|
|
p[1] = p[2];
|
|
p[2] = p1;
|
|
p[3] = p0;
|
|
}
|
|
break;
|
|
case 8:
|
|
for (p = self->ob_item, i = Py_SIZE(self); --i >= 0; p += 8) {
|
|
char p0 = p[0];
|
|
char p1 = p[1];
|
|
char p2 = p[2];
|
|
char p3 = p[3];
|
|
p[0] = p[7];
|
|
p[1] = p[6];
|
|
p[2] = p[5];
|
|
p[3] = p[4];
|
|
p[4] = p3;
|
|
p[5] = p2;
|
|
p[6] = p1;
|
|
p[7] = p0;
|
|
}
|
|
break;
|
|
default:
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"don't know how to byteswap this array type");
|
|
return NULL;
|
|
}
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(byteswap_doc,
|
|
"byteswap()\n\
|
|
\n\
|
|
Byteswap all items of the array. If the items in the array are not 1, 2,\n\
|
|
4, or 8 bytes in size, RuntimeError is raised.");
|
|
|
|
static PyObject *
|
|
array_reverse(arrayobject *self, PyObject *unused)
|
|
{
|
|
register Py_ssize_t itemsize = self->ob_descr->itemsize;
|
|
register char *p, *q;
|
|
/* little buffer to hold items while swapping */
|
|
char tmp[256]; /* 8 is probably enough -- but why skimp */
|
|
assert((size_t)itemsize <= sizeof(tmp));
|
|
|
|
if (Py_SIZE(self) > 1) {
|
|
for (p = self->ob_item,
|
|
q = self->ob_item + (Py_SIZE(self) - 1)*itemsize;
|
|
p < q;
|
|
p += itemsize, q -= itemsize) {
|
|
/* memory areas guaranteed disjoint, so memcpy
|
|
* is safe (& memmove may be slower).
|
|
*/
|
|
memcpy(tmp, p, itemsize);
|
|
memcpy(p, q, itemsize);
|
|
memcpy(q, tmp, itemsize);
|
|
}
|
|
}
|
|
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(reverse_doc,
|
|
"reverse()\n\
|
|
\n\
|
|
Reverse the order of the items in the array.");
|
|
|
|
static PyObject *
|
|
array_fromfile(arrayobject *self, PyObject *args)
|
|
{
|
|
PyObject *f;
|
|
Py_ssize_t n;
|
|
FILE *fp;
|
|
if (!PyArg_ParseTuple(args, "On:fromfile", &f, &n))
|
|
return NULL;
|
|
fp = PyFile_AsFile(f);
|
|
if (fp == NULL) {
|
|
PyErr_SetString(PyExc_TypeError, "arg1 must be open file");
|
|
return NULL;
|
|
}
|
|
if (n > 0) {
|
|
char *item = self->ob_item;
|
|
Py_ssize_t itemsize = self->ob_descr->itemsize;
|
|
size_t nread;
|
|
Py_ssize_t newlength;
|
|
size_t newbytes;
|
|
/* Be careful here about overflow */
|
|
if ((newlength = Py_SIZE(self) + n) <= 0 ||
|
|
(newbytes = newlength * itemsize) / itemsize !=
|
|
(size_t)newlength)
|
|
goto nomem;
|
|
PyMem_RESIZE(item, char, newbytes);
|
|
if (item == NULL) {
|
|
nomem:
|
|
PyErr_NoMemory();
|
|
return NULL;
|
|
}
|
|
self->ob_item = item;
|
|
Py_SIZE(self) += n;
|
|
self->allocated = Py_SIZE(self);
|
|
nread = fread(item + (Py_SIZE(self) - n) * itemsize,
|
|
itemsize, n, fp);
|
|
if (nread < (size_t)n) {
|
|
Py_SIZE(self) -= (n - nread);
|
|
PyMem_RESIZE(item, char, Py_SIZE(self)*itemsize);
|
|
self->ob_item = item;
|
|
self->allocated = Py_SIZE(self);
|
|
if (ferror(fp)) {
|
|
PyErr_SetFromErrno(PyExc_IOError);
|
|
clearerr(fp);
|
|
}
|
|
else {
|
|
PyErr_SetString(PyExc_EOFError,
|
|
"not enough items in file");
|
|
}
|
|
return NULL;
|
|
}
|
|
}
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(fromfile_doc,
|
|
"fromfile(f, n)\n\
|
|
\n\
|
|
Read n objects from the file object f and append them to the end of the\n\
|
|
array. Also called as read.");
|
|
|
|
|
|
static PyObject *
|
|
array_fromfile_as_read(arrayobject *self, PyObject *args)
|
|
{
|
|
if (PyErr_WarnPy3k("array.read() not supported in 3.x; "
|
|
"use array.fromfile()", 1) < 0)
|
|
return NULL;
|
|
return array_fromfile(self, args);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
array_tofile(arrayobject *self, PyObject *f)
|
|
{
|
|
FILE *fp;
|
|
|
|
fp = PyFile_AsFile(f);
|
|
if (fp == NULL) {
|
|
PyErr_SetString(PyExc_TypeError, "arg must be open file");
|
|
return NULL;
|
|
}
|
|
if (Py_SIZE(self) > 0) {
|
|
if (fwrite(self->ob_item, self->ob_descr->itemsize,
|
|
Py_SIZE(self), fp) != (size_t)Py_SIZE(self)) {
|
|
PyErr_SetFromErrno(PyExc_IOError);
|
|
clearerr(fp);
|
|
return NULL;
|
|
}
|
|
}
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(tofile_doc,
|
|
"tofile(f)\n\
|
|
\n\
|
|
Write all items (as machine values) to the file object f. Also called as\n\
|
|
write.");
|
|
|
|
|
|
static PyObject *
|
|
array_tofile_as_write(arrayobject *self, PyObject *f)
|
|
{
|
|
if (PyErr_WarnPy3k("array.write() not supported in 3.x; "
|
|
"use array.tofile()", 1) < 0)
|
|
return NULL;
|
|
return array_tofile(self, f);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
array_fromlist(arrayobject *self, PyObject *list)
|
|
{
|
|
Py_ssize_t n;
|
|
Py_ssize_t itemsize = self->ob_descr->itemsize;
|
|
|
|
if (!PyList_Check(list)) {
|
|
PyErr_SetString(PyExc_TypeError, "arg must be list");
|
|
return NULL;
|
|
}
|
|
n = PyList_Size(list);
|
|
if (n > 0) {
|
|
char *item = self->ob_item;
|
|
Py_ssize_t i;
|
|
PyMem_RESIZE(item, char, (Py_SIZE(self) + n) * itemsize);
|
|
if (item == NULL) {
|
|
PyErr_NoMemory();
|
|
return NULL;
|
|
}
|
|
self->ob_item = item;
|
|
Py_SIZE(self) += n;
|
|
self->allocated = Py_SIZE(self);
|
|
for (i = 0; i < n; i++) {
|
|
PyObject *v = PyList_GetItem(list, i);
|
|
if ((*self->ob_descr->setitem)(self,
|
|
Py_SIZE(self) - n + i, v) != 0) {
|
|
Py_SIZE(self) -= n;
|
|
if (itemsize && (Py_SIZE(self) > PY_SSIZE_T_MAX / itemsize)) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
PyMem_RESIZE(item, char,
|
|
Py_SIZE(self) * itemsize);
|
|
self->ob_item = item;
|
|
self->allocated = Py_SIZE(self);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(fromlist_doc,
|
|
"fromlist(list)\n\
|
|
\n\
|
|
Append items to array from list.");
|
|
|
|
|
|
static PyObject *
|
|
array_tolist(arrayobject *self, PyObject *unused)
|
|
{
|
|
PyObject *list = PyList_New(Py_SIZE(self));
|
|
Py_ssize_t i;
|
|
|
|
if (list == NULL)
|
|
return NULL;
|
|
for (i = 0; i < Py_SIZE(self); i++) {
|
|
PyObject *v = getarrayitem((PyObject *)self, i);
|
|
if (v == NULL) {
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
}
|
|
PyList_SetItem(list, i, v);
|
|
}
|
|
return list;
|
|
}
|
|
|
|
PyDoc_STRVAR(tolist_doc,
|
|
"tolist() -> list\n\
|
|
\n\
|
|
Convert array to an ordinary list with the same items.");
|
|
|
|
|
|
static PyObject *
|
|
array_fromstring(arrayobject *self, PyObject *args)
|
|
{
|
|
char *str;
|
|
Py_ssize_t n;
|
|
int itemsize = self->ob_descr->itemsize;
|
|
if (!PyArg_ParseTuple(args, "s#:fromstring", &str, &n))
|
|
return NULL;
|
|
if (str == self->ob_item) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"array.fromstring(x): x cannot be self");
|
|
return NULL;
|
|
}
|
|
if (n % itemsize != 0) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"string length not a multiple of item size");
|
|
return NULL;
|
|
}
|
|
n = n / itemsize;
|
|
if (n > 0) {
|
|
char *item = self->ob_item;
|
|
if ((n > PY_SSIZE_T_MAX - Py_SIZE(self)) ||
|
|
((Py_SIZE(self) + n) > PY_SSIZE_T_MAX / itemsize)) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
PyMem_RESIZE(item, char, (Py_SIZE(self) + n) * itemsize);
|
|
if (item == NULL) {
|
|
PyErr_NoMemory();
|
|
return NULL;
|
|
}
|
|
self->ob_item = item;
|
|
Py_SIZE(self) += n;
|
|
self->allocated = Py_SIZE(self);
|
|
memcpy(item + (Py_SIZE(self) - n) * itemsize,
|
|
str, itemsize*n);
|
|
}
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
PyDoc_STRVAR(fromstring_doc,
|
|
"fromstring(string)\n\
|
|
\n\
|
|
Appends items from the string, interpreting it as an array of machine\n\
|
|
values,as if it had been read from a file using the fromfile() method).");
|
|
|
|
|
|
static PyObject *
|
|
array_tostring(arrayobject *self, PyObject *unused)
|
|
{
|
|
if (Py_SIZE(self) <= PY_SSIZE_T_MAX / self->ob_descr->itemsize) {
|
|
return PyString_FromStringAndSize(self->ob_item,
|
|
Py_SIZE(self) * self->ob_descr->itemsize);
|
|
} else {
|
|
return PyErr_NoMemory();
|
|
}
|
|
}
|
|
|
|
PyDoc_STRVAR(tostring_doc,
|
|
"tostring() -> string\n\
|
|
\n\
|
|
Convert the array to an array of machine values and return the string\n\
|
|
representation.");
|
|
|
|
|
|
|
|
#ifdef Py_USING_UNICODE
|
|
static PyObject *
|
|
array_fromunicode(arrayobject *self, PyObject *args)
|
|
{
|
|
Py_UNICODE *ustr;
|
|
Py_ssize_t n;
|
|
|
|
if (!PyArg_ParseTuple(args, "u#:fromunicode", &ustr, &n))
|
|
return NULL;
|
|
if (self->ob_descr->typecode != 'u') {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"fromunicode() may only be called on "
|
|
"type 'u' arrays");
|
|
return NULL;
|
|
}
|
|
if (n > 0) {
|
|
Py_UNICODE *item = (Py_UNICODE *) self->ob_item;
|
|
if (Py_SIZE(self) > PY_SSIZE_T_MAX - n) {
|
|
return PyErr_NoMemory();
|
|
}
|
|
PyMem_RESIZE(item, Py_UNICODE, Py_SIZE(self) + n);
|
|
if (item == NULL) {
|
|
PyErr_NoMemory();
|
|
return NULL;
|
|
}
|
|
self->ob_item = (char *) item;
|
|
Py_SIZE(self) += n;
|
|
self->allocated = Py_SIZE(self);
|
|
memcpy(item + Py_SIZE(self) - n,
|
|
ustr, n * sizeof(Py_UNICODE));
|
|
}
|
|
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
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\
|
|
is raised. Use array.fromstring(ustr.decode(...)) to\n\
|
|
append Unicode data to an array of some other type.");
|
|
|
|
|
|
static PyObject *
|
|
array_tounicode(arrayobject *self, PyObject *unused)
|
|
{
|
|
if (self->ob_descr->typecode != 'u') {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"tounicode() may only be called on type 'u' arrays");
|
|
return NULL;
|
|
}
|
|
return PyUnicode_FromUnicode((Py_UNICODE *) self->ob_item, Py_SIZE(self));
|
|
}
|
|
|
|
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\
|
|
array.tostring().decode() to obtain a unicode string from\n\
|
|
an array of some other type.");
|
|
|
|
#endif /* Py_USING_UNICODE */
|
|
|
|
static PyObject *
|
|
array_reduce(arrayobject *array)
|
|
{
|
|
PyObject *dict, *result, *list;
|
|
|
|
dict = PyObject_GetAttrString((PyObject *)array, "__dict__");
|
|
if (dict == NULL) {
|
|
if (!PyErr_ExceptionMatches(PyExc_AttributeError))
|
|
return NULL;
|
|
PyErr_Clear();
|
|
dict = Py_None;
|
|
Py_INCREF(dict);
|
|
}
|
|
/* Unlike in Python 3.x, we never use the more efficient memory
|
|
* representation of an array for pickling. This is unfortunately
|
|
* necessary to allow array objects to be unpickled by Python 3.x,
|
|
* since str objects from 2.x are always decoded to unicode in
|
|
* Python 3.x.
|
|
*/
|
|
list = array_tolist(array, NULL);
|
|
if (list == NULL) {
|
|
Py_DECREF(dict);
|
|
return NULL;
|
|
}
|
|
result = Py_BuildValue(
|
|
"O(cO)O", Py_TYPE(array), array->ob_descr->typecode, list, dict);
|
|
Py_DECREF(list);
|
|
Py_DECREF(dict);
|
|
return result;
|
|
}
|
|
|
|
PyDoc_STRVAR(reduce_doc, "Return state information for pickling.");
|
|
|
|
static PyObject *
|
|
array_sizeof(arrayobject *self, PyObject *unused)
|
|
{
|
|
Py_ssize_t res;
|
|
res = _PyObject_SIZE(Py_TYPE(self)) + self->allocated * self->ob_descr->itemsize;
|
|
return PyLong_FromSsize_t(res);
|
|
}
|
|
|
|
PyDoc_STRVAR(sizeof_doc,
|
|
"__sizeof__() -> int\n\
|
|
\n\
|
|
Size of the array in memory, in bytes.");
|
|
|
|
static PyObject *
|
|
array_get_typecode(arrayobject *a, void *closure)
|
|
{
|
|
char tc = a->ob_descr->typecode;
|
|
return PyString_FromStringAndSize(&tc, 1);
|
|
}
|
|
|
|
static PyObject *
|
|
array_get_itemsize(arrayobject *a, void *closure)
|
|
{
|
|
return PyInt_FromLong((long)a->ob_descr->itemsize);
|
|
}
|
|
|
|
static PyGetSetDef array_getsets [] = {
|
|
{"typecode", (getter) array_get_typecode, NULL,
|
|
"the typecode character used to create the array"},
|
|
{"itemsize", (getter) array_get_itemsize, NULL,
|
|
"the size, in bytes, of one array item"},
|
|
{NULL}
|
|
};
|
|
|
|
static PyMethodDef array_methods[] = {
|
|
{"append", (PyCFunction)array_append, METH_O,
|
|
append_doc},
|
|
{"buffer_info", (PyCFunction)array_buffer_info, METH_NOARGS,
|
|
buffer_info_doc},
|
|
{"byteswap", (PyCFunction)array_byteswap, METH_NOARGS,
|
|
byteswap_doc},
|
|
{"__copy__", (PyCFunction)array_copy, METH_NOARGS,
|
|
copy_doc},
|
|
{"count", (PyCFunction)array_count, METH_O,
|
|
count_doc},
|
|
{"__deepcopy__",(PyCFunction)array_copy, METH_O,
|
|
copy_doc},
|
|
{"extend", (PyCFunction)array_extend, METH_O,
|
|
extend_doc},
|
|
{"fromfile", (PyCFunction)array_fromfile, METH_VARARGS,
|
|
fromfile_doc},
|
|
{"fromlist", (PyCFunction)array_fromlist, METH_O,
|
|
fromlist_doc},
|
|
{"fromstring", (PyCFunction)array_fromstring, METH_VARARGS,
|
|
fromstring_doc},
|
|
#ifdef Py_USING_UNICODE
|
|
{"fromunicode", (PyCFunction)array_fromunicode, METH_VARARGS,
|
|
fromunicode_doc},
|
|
#endif
|
|
{"index", (PyCFunction)array_index, METH_O,
|
|
index_doc},
|
|
{"insert", (PyCFunction)array_insert, METH_VARARGS,
|
|
insert_doc},
|
|
{"pop", (PyCFunction)array_pop, METH_VARARGS,
|
|
pop_doc},
|
|
{"read", (PyCFunction)array_fromfile_as_read, METH_VARARGS,
|
|
fromfile_doc},
|
|
{"__reduce__", (PyCFunction)array_reduce, METH_NOARGS,
|
|
reduce_doc},
|
|
{"remove", (PyCFunction)array_remove, METH_O,
|
|
remove_doc},
|
|
{"reverse", (PyCFunction)array_reverse, METH_NOARGS,
|
|
reverse_doc},
|
|
/* {"sort", (PyCFunction)array_sort, METH_VARARGS,
|
|
sort_doc},*/
|
|
{"tofile", (PyCFunction)array_tofile, METH_O,
|
|
tofile_doc},
|
|
{"tolist", (PyCFunction)array_tolist, METH_NOARGS,
|
|
tolist_doc},
|
|
{"tostring", (PyCFunction)array_tostring, METH_NOARGS,
|
|
tostring_doc},
|
|
#ifdef Py_USING_UNICODE
|
|
{"tounicode", (PyCFunction)array_tounicode, METH_NOARGS,
|
|
tounicode_doc},
|
|
#endif
|
|
{"write", (PyCFunction)array_tofile_as_write, METH_O,
|
|
tofile_doc},
|
|
{"__sizeof__", (PyCFunction)array_sizeof, METH_NOARGS,
|
|
sizeof_doc},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static PyObject *
|
|
array_repr(arrayobject *a)
|
|
{
|
|
char buf[256], typecode;
|
|
PyObject *s, *t, *v = NULL;
|
|
Py_ssize_t len;
|
|
|
|
len = Py_SIZE(a);
|
|
typecode = a->ob_descr->typecode;
|
|
if (len == 0) {
|
|
PyOS_snprintf(buf, sizeof(buf), "array('%c')", typecode);
|
|
return PyString_FromString(buf);
|
|
}
|
|
|
|
if (typecode == 'c')
|
|
v = array_tostring(a, NULL);
|
|
#ifdef Py_USING_UNICODE
|
|
else if (typecode == 'u')
|
|
v = array_tounicode(a, NULL);
|
|
#endif
|
|
else
|
|
v = array_tolist(a, NULL);
|
|
t = PyObject_Repr(v);
|
|
Py_XDECREF(v);
|
|
|
|
PyOS_snprintf(buf, sizeof(buf), "array('%c', ", typecode);
|
|
s = PyString_FromString(buf);
|
|
PyString_ConcatAndDel(&s, t);
|
|
PyString_ConcatAndDel(&s, PyString_FromString(")"));
|
|
return s;
|
|
}
|
|
|
|
static PyObject*
|
|
array_subscr(arrayobject* self, PyObject* item)
|
|
{
|
|
if (PyIndex_Check(item)) {
|
|
Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
|
|
if (i==-1 && PyErr_Occurred()) {
|
|
return NULL;
|
|
}
|
|
if (i < 0)
|
|
i += Py_SIZE(self);
|
|
return array_item(self, i);
|
|
}
|
|
else if (PySlice_Check(item)) {
|
|
Py_ssize_t start, stop, step, slicelength, cur, i;
|
|
PyObject* result;
|
|
arrayobject* ar;
|
|
int itemsize = self->ob_descr->itemsize;
|
|
|
|
if (_PySlice_Unpack(item, &start, &stop, &step) < 0) {
|
|
return NULL;
|
|
}
|
|
slicelength = _PySlice_AdjustIndices(Py_SIZE(self), &start, &stop,
|
|
step);
|
|
|
|
if (slicelength <= 0) {
|
|
return newarrayobject(&Arraytype, 0, self->ob_descr);
|
|
}
|
|
else if (step == 1) {
|
|
PyObject *result = newarrayobject(&Arraytype,
|
|
slicelength, self->ob_descr);
|
|
if (result == NULL)
|
|
return NULL;
|
|
memcpy(((arrayobject *)result)->ob_item,
|
|
self->ob_item + start * itemsize,
|
|
slicelength * itemsize);
|
|
return result;
|
|
}
|
|
else {
|
|
result = newarrayobject(&Arraytype, slicelength, self->ob_descr);
|
|
if (!result) return NULL;
|
|
|
|
ar = (arrayobject*)result;
|
|
|
|
for (cur = start, i = 0; i < slicelength;
|
|
cur += step, i++) {
|
|
memcpy(ar->ob_item + i*itemsize,
|
|
self->ob_item + cur*itemsize,
|
|
itemsize);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
}
|
|
else {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"array indices must be integers");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static int
|
|
array_ass_subscr(arrayobject* self, PyObject* item, PyObject* value)
|
|
{
|
|
Py_ssize_t start, stop, step, slicelength, needed;
|
|
arrayobject* other;
|
|
int itemsize;
|
|
|
|
if (PyIndex_Check(item)) {
|
|
Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError);
|
|
|
|
if (i == -1 && PyErr_Occurred())
|
|
return -1;
|
|
if (i < 0)
|
|
i += Py_SIZE(self);
|
|
if (i < 0 || i >= Py_SIZE(self)) {
|
|
PyErr_SetString(PyExc_IndexError,
|
|
"array assignment index out of range");
|
|
return -1;
|
|
}
|
|
if (value == NULL) {
|
|
/* Fall through to slice assignment */
|
|
start = i;
|
|
stop = i + 1;
|
|
step = 1;
|
|
slicelength = 1;
|
|
}
|
|
else
|
|
return (*self->ob_descr->setitem)(self, i, value);
|
|
}
|
|
else if (PySlice_Check(item)) {
|
|
if (_PySlice_Unpack(item, &start, &stop, &step) < 0) {
|
|
return -1;
|
|
}
|
|
slicelength = _PySlice_AdjustIndices(Py_SIZE(self), &start, &stop,
|
|
step);
|
|
}
|
|
else {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"array indices must be integer");
|
|
return -1;
|
|
}
|
|
if (value == NULL) {
|
|
other = NULL;
|
|
needed = 0;
|
|
}
|
|
else if (array_Check(value)) {
|
|
other = (arrayobject *)value;
|
|
needed = Py_SIZE(other);
|
|
if (self == other) {
|
|
/* Special case "self[i:j] = self" -- copy self first */
|
|
int ret;
|
|
value = array_slice(other, 0, needed);
|
|
if (value == NULL)
|
|
return -1;
|
|
ret = array_ass_subscr(self, item, value);
|
|
Py_DECREF(value);
|
|
return ret;
|
|
}
|
|
if (other->ob_descr != self->ob_descr) {
|
|
PyErr_BadArgument();
|
|
return -1;
|
|
}
|
|
}
|
|
else {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can only assign array (not \"%.200s\") to array slice",
|
|
Py_TYPE(value)->tp_name);
|
|
return -1;
|
|
}
|
|
itemsize = self->ob_descr->itemsize;
|
|
/* for 'a[2:1] = ...', the insertion point is 'start', not 'stop' */
|
|
if ((step > 0 && stop < start) ||
|
|
(step < 0 && stop > start))
|
|
stop = start;
|
|
if (step == 1) {
|
|
if (slicelength > needed) {
|
|
memmove(self->ob_item + (start + needed) * itemsize,
|
|
self->ob_item + stop * itemsize,
|
|
(Py_SIZE(self) - stop) * itemsize);
|
|
if (array_resize(self, Py_SIZE(self) +
|
|
needed - slicelength) < 0)
|
|
return -1;
|
|
}
|
|
else if (slicelength < needed) {
|
|
if (array_resize(self, Py_SIZE(self) +
|
|
needed - slicelength) < 0)
|
|
return -1;
|
|
memmove(self->ob_item + (start + needed) * itemsize,
|
|
self->ob_item + stop * itemsize,
|
|
(Py_SIZE(self) - start - needed) * itemsize);
|
|
}
|
|
if (needed > 0)
|
|
memcpy(self->ob_item + start * itemsize,
|
|
other->ob_item, needed * itemsize);
|
|
return 0;
|
|
}
|
|
else if (needed == 0) {
|
|
/* Delete slice */
|
|
size_t cur;
|
|
Py_ssize_t i;
|
|
|
|
if (step < 0) {
|
|
stop = start + 1;
|
|
start = stop + step * (slicelength - 1) - 1;
|
|
step = -step;
|
|
}
|
|
for (cur = start, i = 0; i < slicelength;
|
|
cur += step, i++) {
|
|
Py_ssize_t lim = step - 1;
|
|
|
|
if (cur + step >= (size_t)Py_SIZE(self))
|
|
lim = Py_SIZE(self) - cur - 1;
|
|
memmove(self->ob_item + (cur - i) * itemsize,
|
|
self->ob_item + (cur + 1) * itemsize,
|
|
lim * itemsize);
|
|
}
|
|
cur = start + slicelength * step;
|
|
if (cur < (size_t)Py_SIZE(self)) {
|
|
memmove(self->ob_item + (cur-slicelength) * itemsize,
|
|
self->ob_item + cur * itemsize,
|
|
(Py_SIZE(self) - cur) * itemsize);
|
|
}
|
|
if (array_resize(self, Py_SIZE(self) - slicelength) < 0)
|
|
return -1;
|
|
return 0;
|
|
}
|
|
else {
|
|
Py_ssize_t cur, i;
|
|
|
|
if (needed != slicelength) {
|
|
PyErr_Format(PyExc_ValueError,
|
|
"attempt to assign array of size %zd "
|
|
"to extended slice of size %zd",
|
|
needed, slicelength);
|
|
return -1;
|
|
}
|
|
for (cur = start, i = 0; i < slicelength;
|
|
cur += step, i++) {
|
|
memcpy(self->ob_item + cur * itemsize,
|
|
other->ob_item + i * itemsize,
|
|
itemsize);
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static PyMappingMethods array_as_mapping = {
|
|
(lenfunc)array_length,
|
|
(binaryfunc)array_subscr,
|
|
(objobjargproc)array_ass_subscr
|
|
};
|
|
|
|
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)
|
|
{
|
|
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_getsegcount(arrayobject *self, Py_ssize_t *lenp)
|
|
{
|
|
if ( lenp )
|
|
*lenp = Py_SIZE(self)*self->ob_descr->itemsize;
|
|
return 1;
|
|
}
|
|
|
|
static PySequenceMethods array_as_sequence = {
|
|
(lenfunc)array_length, /*sq_length*/
|
|
(binaryfunc)array_concat, /*sq_concat*/
|
|
(ssizeargfunc)array_repeat, /*sq_repeat*/
|
|
(ssizeargfunc)array_item, /*sq_item*/
|
|
(ssizessizeargfunc)array_slice, /*sq_slice*/
|
|
(ssizeobjargproc)array_ass_item, /*sq_ass_item*/
|
|
(ssizessizeobjargproc)array_ass_slice, /*sq_ass_slice*/
|
|
(objobjproc)array_contains, /*sq_contains*/
|
|
(binaryfunc)array_inplace_concat, /*sq_inplace_concat*/
|
|
(ssizeargfunc)array_inplace_repeat /*sq_inplace_repeat*/
|
|
};
|
|
|
|
static PyBufferProcs array_as_buffer = {
|
|
(readbufferproc)array_buffer_getreadbuf,
|
|
(writebufferproc)array_buffer_getwritebuf,
|
|
(segcountproc)array_buffer_getsegcount,
|
|
NULL,
|
|
};
|
|
|
|
static PyObject *
|
|
array_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
int c = -1;
|
|
PyObject *initial = NULL, *it = NULL, *typecode = NULL;
|
|
struct arraydescr *descr;
|
|
|
|
if (type == &Arraytype && !_PyArg_NoKeywords("array.array()", kwds))
|
|
return NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|O:array", &typecode, &initial))
|
|
return NULL;
|
|
|
|
if (PyString_Check(typecode) && PyString_GET_SIZE(typecode) == 1)
|
|
c = (unsigned char)*PyString_AS_STRING(typecode);
|
|
#ifdef Py_USING_UNICODE
|
|
else if (PyUnicode_Check(typecode) && PyUnicode_GET_SIZE(typecode) == 1)
|
|
c = *PyUnicode_AS_UNICODE(typecode);
|
|
#endif
|
|
else {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"array() argument 1 or typecode must be char (string or "
|
|
"ascii-unicode with length 1), not %s",
|
|
Py_TYPE(typecode)->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
if (!(initial == NULL || PyList_Check(initial)
|
|
|| PyString_Check(initial) || PyTuple_Check(initial)
|
|
|| (c == 'u' && PyUnicode_Check(initial)))) {
|
|
it = PyObject_GetIter(initial);
|
|
if (it == NULL)
|
|
return NULL;
|
|
/* We set initial to NULL so that the subsequent code
|
|
will create an empty array of the appropriate type
|
|
and afterwards we can use array_iter_extend to populate
|
|
the array.
|
|
*/
|
|
initial = NULL;
|
|
}
|
|
for (descr = descriptors; descr->typecode != '\0'; descr++) {
|
|
if (descr->typecode == c) {
|
|
PyObject *a;
|
|
Py_ssize_t len;
|
|
|
|
if (initial == NULL || !(PyList_Check(initial)
|
|
|| PyTuple_Check(initial)))
|
|
len = 0;
|
|
else
|
|
len = PySequence_Size(initial);
|
|
|
|
a = newarrayobject(type, len, descr);
|
|
if (a == NULL)
|
|
return NULL;
|
|
|
|
if (len > 0) {
|
|
Py_ssize_t i;
|
|
for (i = 0; i < len; i++) {
|
|
PyObject *v =
|
|
PySequence_GetItem(initial, i);
|
|
if (v == NULL) {
|
|
Py_DECREF(a);
|
|
return NULL;
|
|
}
|
|
if (setarrayitem(a, i, v) != 0) {
|
|
Py_DECREF(v);
|
|
Py_DECREF(a);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(v);
|
|
}
|
|
} else if (initial != NULL && PyString_Check(initial)) {
|
|
PyObject *t_initial, *v;
|
|
t_initial = PyTuple_Pack(1, initial);
|
|
if (t_initial == NULL) {
|
|
Py_DECREF(a);
|
|
return NULL;
|
|
}
|
|
v = array_fromstring((arrayobject *)a,
|
|
t_initial);
|
|
Py_DECREF(t_initial);
|
|
if (v == NULL) {
|
|
Py_DECREF(a);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(v);
|
|
#ifdef Py_USING_UNICODE
|
|
} else if (initial != NULL && PyUnicode_Check(initial)) {
|
|
Py_ssize_t n = PyUnicode_GET_DATA_SIZE(initial);
|
|
if (n > 0) {
|
|
arrayobject *self = (arrayobject *)a;
|
|
char *item = self->ob_item;
|
|
item = (char *)PyMem_Realloc(item, n);
|
|
if (item == NULL) {
|
|
PyErr_NoMemory();
|
|
Py_DECREF(a);
|
|
return NULL;
|
|
}
|
|
self->ob_item = item;
|
|
Py_SIZE(self) = n / sizeof(Py_UNICODE);
|
|
memcpy(item, PyUnicode_AS_DATA(initial), n);
|
|
self->allocated = Py_SIZE(self);
|
|
}
|
|
#endif
|
|
}
|
|
if (it != NULL) {
|
|
if (array_iter_extend((arrayobject *)a, it) == -1) {
|
|
Py_DECREF(it);
|
|
Py_DECREF(a);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(it);
|
|
}
|
|
return a;
|
|
}
|
|
}
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"bad typecode (must be c, b, B, u, h, H, i, I, l, L, f or d)");
|
|
return NULL;
|
|
}
|
|
|
|
|
|
PyDoc_STRVAR(module_doc,
|
|
"This module defines an object type which can efficiently represent\n\
|
|
an array of basic values: characters, integers, floating point\n\
|
|
numbers. Arrays are sequence types and behave very much like lists,\n\
|
|
except that the type of objects stored in them is constrained. The\n\
|
|
type is specified at object creation time by using a type code, which\n\
|
|
is a single character. The following type codes are defined:\n\
|
|
\n\
|
|
Type code C Type Minimum size in bytes \n\
|
|
'c' character 1 \n\
|
|
'b' signed integer 1 \n\
|
|
'B' unsigned integer 1 \n\
|
|
'u' Unicode character 2 \n\
|
|
'h' signed integer 2 \n\
|
|
'H' unsigned integer 2 \n\
|
|
'i' signed integer 2 \n\
|
|
'I' unsigned integer 2 \n\
|
|
'l' signed integer 4 \n\
|
|
'L' unsigned integer 4 \n\
|
|
'f' floating point 4 \n\
|
|
'd' floating point 8 \n\
|
|
\n\
|
|
The constructor is:\n\
|
|
\n\
|
|
array(typecode [, initializer]) -- create a new array\n\
|
|
");
|
|
|
|
PyDoc_STRVAR(arraytype_doc,
|
|
"array(typecode [, initializer]) -> array\n\
|
|
\n\
|
|
Return a new array whose items are restricted by typecode, and\n\
|
|
initialized from the optional initializer value, which must be a list,\n\
|
|
string or iterable over elements of the appropriate type.\n\
|
|
\n\
|
|
Arrays represent basic values and behave very much like lists, except\n\
|
|
the type of objects stored in them is constrained.\n\
|
|
\n\
|
|
Methods:\n\
|
|
\n\
|
|
append() -- append a new item to the end of the array\n\
|
|
buffer_info() -- return information giving the current memory info\n\
|
|
byteswap() -- byteswap all the items of the array\n\
|
|
count() -- return number of occurrences of an object\n\
|
|
extend() -- extend array by appending multiple elements from an iterable\n\
|
|
fromfile() -- read items from a file object\n\
|
|
fromlist() -- append items from the list\n\
|
|
fromstring() -- append items from the string\n\
|
|
index() -- return index of first occurrence of an object\n\
|
|
insert() -- insert a new item into the array at a provided position\n\
|
|
pop() -- remove and return item (default last)\n\
|
|
read() -- DEPRECATED, use fromfile()\n\
|
|
remove() -- remove first occurrence of an object\n\
|
|
reverse() -- reverse the order of the items in the array\n\
|
|
tofile() -- write all items to a file object\n\
|
|
tolist() -- return the array converted to an ordinary list\n\
|
|
tostring() -- return the array converted to a string\n\
|
|
write() -- DEPRECATED, use tofile()\n\
|
|
\n\
|
|
Attributes:\n\
|
|
\n\
|
|
typecode -- the typecode character used to create the array\n\
|
|
itemsize -- the length in bytes of one array item\n\
|
|
");
|
|
|
|
static PyObject *array_iter(arrayobject *ao);
|
|
|
|
static PyTypeObject Arraytype = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"array.array",
|
|
sizeof(arrayobject),
|
|
0,
|
|
(destructor)array_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
(reprfunc)array_repr, /* tp_repr */
|
|
0, /* tp_as_number*/
|
|
&array_as_sequence, /* tp_as_sequence*/
|
|
&array_as_mapping, /* tp_as_mapping*/
|
|
0, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
&array_as_buffer, /* tp_as_buffer*/
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_WEAKREFS, /* tp_flags */
|
|
arraytype_doc, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
array_richcompare, /* tp_richcompare */
|
|
offsetof(arrayobject, weakreflist), /* tp_weaklistoffset */
|
|
(getiterfunc)array_iter, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
array_methods, /* tp_methods */
|
|
0, /* tp_members */
|
|
array_getsets, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
PyType_GenericAlloc, /* tp_alloc */
|
|
array_new, /* tp_new */
|
|
PyObject_Del, /* tp_free */
|
|
};
|
|
|
|
|
|
/*********************** Array Iterator **************************/
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
Py_ssize_t index;
|
|
arrayobject *ao;
|
|
PyObject * (*getitem)(struct arrayobject *, Py_ssize_t);
|
|
} arrayiterobject;
|
|
|
|
static PyTypeObject PyArrayIter_Type;
|
|
|
|
#define PyArrayIter_Check(op) PyObject_TypeCheck(op, &PyArrayIter_Type)
|
|
|
|
static PyObject *
|
|
array_iter(arrayobject *ao)
|
|
{
|
|
arrayiterobject *it;
|
|
|
|
if (!array_Check(ao)) {
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
|
|
it = PyObject_GC_New(arrayiterobject, &PyArrayIter_Type);
|
|
if (it == NULL)
|
|
return NULL;
|
|
|
|
Py_INCREF(ao);
|
|
it->ao = ao;
|
|
it->index = 0;
|
|
it->getitem = ao->ob_descr->getitem;
|
|
PyObject_GC_Track(it);
|
|
return (PyObject *)it;
|
|
}
|
|
|
|
static PyObject *
|
|
arrayiter_next(arrayiterobject *it)
|
|
{
|
|
assert(PyArrayIter_Check(it));
|
|
if (it->index < Py_SIZE(it->ao))
|
|
return (*it->getitem)(it->ao, it->index++);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
arrayiter_dealloc(arrayiterobject *it)
|
|
{
|
|
PyObject_GC_UnTrack(it);
|
|
Py_XDECREF(it->ao);
|
|
PyObject_GC_Del(it);
|
|
}
|
|
|
|
static int
|
|
arrayiter_traverse(arrayiterobject *it, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(it->ao);
|
|
return 0;
|
|
}
|
|
|
|
static PyTypeObject PyArrayIter_Type = {
|
|
PyVarObject_HEAD_INIT(NULL, 0)
|
|
"arrayiterator", /* tp_name */
|
|
sizeof(arrayiterobject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
(destructor)arrayiter_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
0, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
|
|
0, /* tp_doc */
|
|
(traverseproc)arrayiter_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
PyObject_SelfIter, /* tp_iter */
|
|
(iternextfunc)arrayiter_next, /* tp_iternext */
|
|
0, /* tp_methods */
|
|
};
|
|
|
|
|
|
/*********************** Install Module **************************/
|
|
|
|
/* No functions in array module. */
|
|
static PyMethodDef a_methods[] = {
|
|
{NULL, NULL, 0, NULL} /* Sentinel */
|
|
};
|
|
|
|
|
|
PyMODINIT_FUNC
|
|
initarray(void)
|
|
{
|
|
PyObject *m;
|
|
|
|
Py_TYPE(&Arraytype) = &PyType_Type;
|
|
Py_TYPE(&PyArrayIter_Type) = &PyType_Type;
|
|
m = Py_InitModule3("array", a_methods, module_doc);
|
|
if (m == NULL)
|
|
return;
|
|
|
|
Py_INCREF((PyObject *)&Arraytype);
|
|
PyModule_AddObject(m, "ArrayType", (PyObject *)&Arraytype);
|
|
Py_INCREF((PyObject *)&Arraytype);
|
|
PyModule_AddObject(m, "array", (PyObject *)&Arraytype);
|
|
/* No need to check the error here, the caller will do that */
|
|
}
|