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- /***********************************************************
- Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
- The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI or Corporation for National Research Initiatives or
- CNRI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior
- permission.
-
- While CWI is the initial source for this software, a modified version
- is made available by the Corporation for National Research Initiatives
- (CNRI) at the Internet address ftp://ftp.python.org.
-
- STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
- REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
- CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
- DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* Array object implementation */
-
- /* An array is a uniform list -- all items have the same type.
- The item type is restricted to simple C types like int or float */
-
- #include "Python.h"
-
- #ifdef STDC_HEADERS
- #include <stddef.h>
- #else
- #include <sys/types.h> /* For size_t */
- #endif
-
- struct arrayobject; /* Forward */
-
- struct arraydescr {
- int typecode;
- int itemsize;
- PyObject * (*getitem) Py_FPROTO((struct arrayobject *, int));
- int (*setitem) Py_FPROTO((struct arrayobject *, int, PyObject *));
- };
-
- typedef struct arrayobject {
- PyObject_VAR_HEAD
- char *ob_item;
- struct arraydescr *ob_descr;
- } arrayobject;
-
- staticforward PyTypeObject Arraytype;
-
- #define is_arrayobject(op) ((op)->ob_type == &Arraytype)
-
- /* Forward */
- #include "protos/arraymodule.h"
- static PyObject *newarrayobject Py_PROTO((int, struct arraydescr *));
- #if 0
- static int getarraysize Py_PROTO((PyObject *));
- #endif
- static PyObject *getarrayitem Py_PROTO((PyObject *, int));
- static int setarrayitem Py_PROTO((PyObject *, int, PyObject *));
- #if 0
- static int insarrayitem Py_PROTO((PyObject *, int, PyObject *));
- static int addarrayitem Py_PROTO((PyObject *, PyObject *));
- #endif
-
- static PyObject *
- c_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyString_FromStringAndSize(&((char *)ap->ob_item)[i], 1);
- }
-
- static int
- c_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- char x;
- if (!PyArg_Parse(v, "c;array item must be char", &x))
- return -1;
- if (i >= 0)
- ((char *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- b_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- long x = ((char *)ap->ob_item)[i];
- if (x >= 128)
- x -= 256;
- return PyInt_FromLong(x);
- }
-
- static int
- b_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- char x;
- if (!PyArg_Parse(v, "b;array item must be integer", &x))
- return -1;
- if (i >= 0)
- ((char *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- BB_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- long x = ((unsigned char *)ap->ob_item)[i];
- return PyInt_FromLong(x);
- }
-
- #define BB_setitem b_setitem
-
- static PyObject *
- h_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyInt_FromLong((long) ((short *)ap->ob_item)[i]);
- }
-
- static int
- h_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- short x;
- if (!PyArg_Parse(v, "h;array item must be integer", &x))
- return -1;
- if (i >= 0)
- ((short *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- HH_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyInt_FromLong((long) ((unsigned short *)ap->ob_item)[i]);
- }
-
- #define HH_setitem h_setitem
-
- static PyObject *
- i_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyInt_FromLong((long) ((int *)ap->ob_item)[i]);
- }
-
- static int
- i_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- int x;
- if (!PyArg_Parse(v, "i;array item must be integer", &x))
- return -1;
- if (i >= 0)
- ((int *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- II_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyLong_FromUnsignedLong(
- (unsigned long) ((unsigned int *)ap->ob_item)[i]);
- }
-
- static int
- II_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- unsigned long x;
- if (PyLong_Check(v)) {
- x = PyLong_AsUnsignedLong(v);
- if (x == (unsigned long) -1 && PyErr_Occurred())
- return -1;
- }
- else {
- if (!PyArg_Parse(v, "l;array item must be integer", &x))
- return -1;
- }
- if (i >= 0)
- ((unsigned int *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- l_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyInt_FromLong(((long *)ap->ob_item)[i]);
- }
-
- static int
- l_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- long x;
- if (!PyArg_Parse(v, "l;array item must be integer", &x))
- return -1;
- if (i >= 0)
- ((long *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- LL_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyLong_FromUnsignedLong(((unsigned long *)ap->ob_item)[i]);
- }
-
- static int
- LL_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- unsigned long x;
- if (PyLong_Check(v)) {
- x = PyLong_AsUnsignedLong(v);
- if (x == (unsigned long) -1 && PyErr_Occurred())
- return -1;
- }
- else {
- if (!PyArg_Parse(v, "l;array item must be integer", &x))
- return -1;
- }
- if (i >= 0)
- ((unsigned long *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- f_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyFloat_FromDouble((double) ((float *)ap->ob_item)[i]);
- }
-
- static int
- f_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- float x;
- if (!PyArg_Parse(v, "f;array item must be float", &x))
- return -1;
- if (i >= 0)
- ((float *)ap->ob_item)[i] = x;
- return 0;
- }
-
- static PyObject *
- d_getitem(ap, i)
- arrayobject *ap;
- int i;
- {
- return PyFloat_FromDouble(((double *)ap->ob_item)[i]);
- }
-
- static int
- d_setitem(ap, i, v)
- arrayobject *ap;
- int i;
- PyObject *v;
- {
- double x;
- if (!PyArg_Parse(v, "d;array item must be float", &x))
- return -1;
- if (i >= 0)
- ((double *)ap->ob_item)[i] = x;
- return 0;
- }
-
- /* Description of types */
- static struct arraydescr descriptors[] = {
- {'c', sizeof(char), c_getitem, c_setitem},
- {'b', sizeof(char), b_getitem, b_setitem},
- {'B', sizeof(char), BB_getitem, BB_setitem},
- {'h', sizeof(short), h_getitem, h_setitem},
- {'H', sizeof(short), HH_getitem, HH_setitem},
- {'i', sizeof(int), i_getitem, i_setitem},
- {'I', sizeof(int), II_getitem, II_setitem},
- {'l', sizeof(long), l_getitem, l_setitem},
- {'L', sizeof(long), LL_getitem, LL_setitem},
- {'f', sizeof(float), f_getitem, f_setitem},
- {'d', sizeof(double), d_getitem, d_setitem},
- {'\0', 0, 0, 0} /* Sentinel */
- };
- /* If we ever allow items larger than double, we must change reverse()! */
-
-
- static PyObject *
- newarrayobject(size, descr)
- int size;
- struct arraydescr *descr;
- {
- arrayobject *op;
- size_t nbytes;
- if (size < 0) {
- PyErr_BadInternalCall();
- return NULL;
- }
- nbytes = size * descr->itemsize;
- /* Check for overflow */
- if (nbytes / descr->itemsize != (size_t)size) {
- return PyErr_NoMemory();
- }
- op = PyMem_NEW(arrayobject, 1);
- if (op == NULL) {
- return PyErr_NoMemory();
- }
- if (size <= 0) {
- op->ob_item = NULL;
- }
- else {
- op->ob_item = PyMem_NEW(char, nbytes);
- if (op->ob_item == NULL) {
- PyMem_DEL(op);
- return PyErr_NoMemory();
- }
- }
- op->ob_type = &Arraytype;
- op->ob_size = size;
- op->ob_descr = descr;
- _Py_NewReference(op);
- return (PyObject *) op;
- }
-
- #if 0
- static int
- getarraysize(op)
- PyObject *op;
- {
- if (!is_arrayobject(op)) {
- PyErr_BadInternalCall();
- return -1;
- }
- return ((arrayobject *)op) -> ob_size;
- }
- #endif
-
- static PyObject *
- getarrayitem(op, i)
- PyObject *op;
- int i;
- {
- register arrayobject *ap;
- if (!is_arrayobject(op)) {
- PyErr_BadInternalCall();
- return NULL;
- }
- ap = (arrayobject *)op;
- if (i < 0 || i >= ap->ob_size) {
- PyErr_SetString(PyExc_IndexError, "array index out of range");
- return NULL;
- }
- return (*ap->ob_descr->getitem)(ap, i);
- }
-
- static int
- ins1(self, where, v)
- arrayobject *self;
- int where;
- PyObject *v;
- {
- char *items;
- if (v == NULL) {
- PyErr_BadInternalCall();
- return -1;
- }
- if ((*self->ob_descr->setitem)(self, -1, v) < 0)
- return -1;
- items = self->ob_item;
- PyMem_RESIZE(items, char,
- (self->ob_size+1) * self->ob_descr->itemsize);
- if (items == NULL) {
- PyErr_NoMemory();
- return -1;
- }
- if (where < 0)
- where = 0;
- if (where > self->ob_size)
- where = self->ob_size;
- memmove(items + (where+1)*self->ob_descr->itemsize,
- items + where*self->ob_descr->itemsize,
- (self->ob_size-where)*self->ob_descr->itemsize);
- self->ob_item = items;
- self->ob_size++;
- return (*self->ob_descr->setitem)(self, where, v);
- }
-
- #if 0
- static int
- insarrayitem(op, where, newitem)
- PyObject *op;
- int where;
- PyObject *newitem;
- {
- if (!is_arrayobject(op)) {
- PyErr_BadInternalCall();
- return -1;
- }
- return ins1((arrayobject *)op, where, newitem);
- }
-
- static int
- addarrayitem(op, newitem)
- PyObject *op;
- PyObject *newitem;
- {
- if (!is_arrayobject(op)) {
- PyErr_BadInternalCall();
- return -1;
- }
- return ins1((arrayobject *)op,
- (int) ((arrayobject *)op)->ob_size, newitem);
- }
- #endif
-
- /* Methods */
-
- static void
- array_dealloc(op)
- arrayobject *op;
- {
- if (op->ob_item != NULL)
- PyMem_DEL(op->ob_item);
- PyMem_DEL(op);
- }
-
- static int
- array_compare(v, w)
- arrayobject *v, *w;
- {
- int len = (v->ob_size < w->ob_size) ? v->ob_size : w->ob_size;
- int i;
- for (i = 0; i < len; i++) {
- PyObject *ai, *bi;
- int cmp;
- ai = getarrayitem((PyObject *)v, i);
- bi = getarrayitem((PyObject *)w, i);
- if (ai && bi)
- cmp = PyObject_Compare(ai, bi);
- else
- cmp = -1;
- Py_XDECREF(ai);
- Py_XDECREF(bi);
- if (cmp != 0)
- return cmp;
- }
- return v->ob_size - w->ob_size;
- }
-
- static int
- array_length(a)
- arrayobject *a;
- {
- return a->ob_size;
- }
-
- static PyObject *
- array_item(a, i)
- arrayobject *a;
- int i;
- {
- if (i < 0 || i >= a->ob_size) {
- PyErr_SetString(PyExc_IndexError, "array index out of range");
- return NULL;
- }
- return getarrayitem((PyObject *)a, i);
- }
-
- static PyObject *
- array_slice(a, ilow, ihigh)
- arrayobject *a;
- int ilow, ihigh;
- {
- arrayobject *np;
- if (ilow < 0)
- ilow = 0;
- else if (ilow > a->ob_size)
- ilow = a->ob_size;
- if (ihigh < 0)
- ihigh = 0;
- if (ihigh < ilow)
- ihigh = ilow;
- else if (ihigh > a->ob_size)
- ihigh = a->ob_size;
- np = (arrayobject *) newarrayobject(ihigh - ilow, a->ob_descr);
- if (np == NULL)
- return NULL;
- memcpy(np->ob_item, a->ob_item + ilow * a->ob_descr->itemsize,
- (ihigh-ilow) * a->ob_descr->itemsize);
- return (PyObject *)np;
- }
-
- static PyObject *
- array_concat(a, bb)
- arrayobject *a;
- PyObject *bb;
- {
- int size;
- arrayobject *np;
- if (!is_arrayobject(bb)) {
- PyErr_BadArgument();
- return NULL;
- }
- #define b ((arrayobject *)bb)
- if (a->ob_descr != b->ob_descr) {
- PyErr_BadArgument();
- return NULL;
- }
- size = a->ob_size + b->ob_size;
- np = (arrayobject *) newarrayobject(size, a->ob_descr);
- if (np == NULL) {
- return NULL;
- }
- memcpy(np->ob_item, a->ob_item, a->ob_size*a->ob_descr->itemsize);
- memcpy(np->ob_item + a->ob_size*a->ob_descr->itemsize,
- b->ob_item, b->ob_size*b->ob_descr->itemsize);
- return (PyObject *)np;
- #undef b
- }
-
- static PyObject *
- array_repeat(a, n)
- arrayobject *a;
- int n;
- {
- int i;
- int size;
- arrayobject *np;
- char *p;
- int nbytes;
- if (n < 0)
- n = 0;
- size = a->ob_size * n;
- np = (arrayobject *) newarrayobject(size, a->ob_descr);
- if (np == NULL)
- return NULL;
- p = np->ob_item;
- nbytes = a->ob_size * 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(a, ilow, ihigh, v)
- arrayobject *a;
- int ilow, ihigh;
- PyObject *v;
- {
- char *item;
- int n; /* Size of replacement array */
- int d; /* Change in size */
- #define b ((arrayobject *)v)
- if (v == NULL)
- n = 0;
- else if (is_arrayobject(v)) {
- n = b->ob_size;
- if (a == b) {
- /* Special case "a[i:j] = a" -- copy b first */
- int ret;
- v = array_slice(b, 0, n);
- 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_BadArgument();
- return -1;
- }
- if (ilow < 0)
- ilow = 0;
- else if (ilow > a->ob_size)
- ilow = a->ob_size;
- if (ihigh < 0)
- ihigh = 0;
- if (ihigh < ilow)
- ihigh = ilow;
- else if (ihigh > a->ob_size)
- ihigh = a->ob_size;
- 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,
- (a->ob_size-ihigh)*a->ob_descr->itemsize);
- a->ob_size += d;
- PyMem_RESIZE(item, char, a->ob_size*a->ob_descr->itemsize);
- /* Can't fail */
- a->ob_item = item;
- }
- else if (d > 0) { /* Insert d items */
- PyMem_RESIZE(item, char,
- (a->ob_size + 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,
- (a->ob_size-ihigh)*a->ob_descr->itemsize);
- a->ob_item = item;
- a->ob_size += d;
- }
- 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(a, i, v)
- arrayobject *a;
- int i;
- PyObject *v;
- {
- if (i < 0 || i >= a->ob_size) {
- 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(a, i, v)
- PyObject *a;
- int i;
- PyObject *v;
- {
- if (!is_arrayobject(a)) {
- PyErr_BadInternalCall();
- return -1;
- }
- return array_ass_item((arrayobject *)a, i, v);
- }
-
- static PyObject *
- ins(self, where, v)
- arrayobject *self;
- int where;
- PyObject *v;
- {
- if (ins1(self, where, v) != 0)
- return NULL;
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static PyObject *
- array_insert(self, args)
- arrayobject *self;
- PyObject *args;
- {
- int i;
- PyObject *v;
- if (!PyArg_Parse(args, "(iO)", &i, &v))
- return NULL;
- return ins(self, i, v);
- }
-
- static char insert_doc [] =
- "insert (i,x)\n\
- \n\
- Insert a new item x into the array before position i.";
-
-
- static PyObject *
- array_buffer_info(self, args)
- arrayobject *self;
- PyObject *args;
- {
- return Py_BuildValue("ll",
- (long)(self->ob_item), (long)(self->ob_size));
- }
-
- static char buffer_info_doc [] =
- "buffer_info -> (address, length)\n\
- \n\
- Return a tuple (address, length) giving the current memory address and\n\
- the length in bytes of the buffer used to hold array's contents.";
-
-
- static PyObject *
- array_append(self, args)
- arrayobject *self;
- PyObject *args;
- {
- PyObject *v;
- if (!PyArg_Parse(args, "O", &v))
- return NULL;
- return ins(self, (int) self->ob_size, v);
- }
-
- static char append_doc [] =
- "append(x)\n\
- \n\
- Append new value x to the end of the array.";
-
-
- static PyObject *
- array_byteswap(self, args)
- arrayobject *self;
- PyObject *args;
- {
- char *p;
- int i;
- switch (self->ob_descr->itemsize) {
- case 1:
- break;
- case 2:
- for (p = self->ob_item, i = self->ob_size; --i >= 0; p += 2) {
- char p0 = p[0];
- p[0] = p[1];
- p[1] = p0;
- }
- break;
- case 4:
- for (p = self->ob_item, i = self->ob_size; --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 = self->ob_size; --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;
- }
-
- static char byteswap_doc [] =
- "byteswap(x)\n\
- \n\
- Byteswap all items of the array. This is only supported for integer\n\
- values of x, which determines the size of the blocks swapped.";
-
- static PyObject *
- array_reverse(self, args)
- arrayobject *self;
- PyObject *args;
- {
- register int itemsize = self->ob_descr->itemsize;
- register char *p, *q;
- char tmp[sizeof(double)]; /* Assume that's the max item size */
-
- if (args != NULL) {
- PyErr_BadArgument();
- return NULL;
- }
-
- if (self->ob_size > 1) {
- for (p = self->ob_item,
- q = self->ob_item + (self->ob_size - 1)*itemsize;
- p < q;
- p += itemsize, q -= itemsize) {
- memmove(tmp, p, itemsize);
- memmove(p, q, itemsize);
- memmove(q, tmp, itemsize);
- }
- }
-
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static char reverse_doc [] =
- "reverse()\n\
- \n\
- Reverse the order of the items in the array.";
-
- /* The following routines were adapted from listobject.c but not converted.
- To make them work you will have to work! */
-
- #if 0
- static PyObject *
- array_index(self, args)
- arrayobject *self;
- PyObject *args;
- {
- int i;
-
- if (args == NULL) {
- PyErr_BadArgument();
- return NULL;
- }
- for (i = 0; i < self->ob_size; i++) {
- if (PyObject_Compare(self->ob_item[i], args) == 0)
- return PyInt_FromLong((long)i);
- /* XXX PyErr_Occurred */
- }
- PyErr_SetString(PyExc_ValueError, "array.index(x): x not in array");
- return NULL;
- }
- #endif
-
- #if 0
- static PyObject *
- array_count(self, args)
- arrayobject *self;
- PyObject *args;
- {
- int count = 0;
- int i;
-
- if (args == NULL) {
- PyErr_BadArgument();
- return NULL;
- }
- for (i = 0; i < self->ob_size; i++) {
- if (PyObject_Compare(self->ob_item[i], args) == 0)
- count++;
- /* XXX PyErr_Occurred */
- }
- return PyInt_FromLong((long)count);
- }
- #endif
-
- #if 0
- static PyObject *
- array_remove(self, args)
- arrayobject *self;
- PyObject *args;
- {
- int i;
-
- if (args == NULL) {
- PyErr_BadArgument();
- return NULL;
- }
- for (i = 0; i < self->ob_size; i++) {
- if (PyObject_Compare(self->ob_item[i], args) == 0) {
- if (array_ass_slice(self, i, i+1,
- (PyObject *)NULL) != 0)
- return NULL;
- Py_INCREF(Py_None);
- return Py_None;
- }
- /* XXX PyErr_Occurred */
- }
- PyErr_SetString(PyExc_ValueError, "array.remove(x): x not in array");
- return NULL;
- }
- #endif
-
- static PyObject *
- array_fromfile(self, args)
- arrayobject *self;
- PyObject *args;
- {
- PyObject *f;
- int n;
- FILE *fp;
- if (!PyArg_Parse(args, "(Oi)", &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;
- int itemsize = self->ob_descr->itemsize;
- int nread;
- int newlength;
- size_t newbytes;
- /* Be careful here about overflow */
- if ((newlength = self->ob_size + 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;
- self->ob_size += n;
- nread = fread(item + (self->ob_size - n) * itemsize,
- itemsize, n, fp);
- if (nread < n) {
- self->ob_size -= (n - nread);
- PyMem_RESIZE(item, char, self->ob_size*itemsize);
- self->ob_item = item;
- PyErr_SetString(PyExc_EOFError,
- "not enough items in file");
- return NULL;
- }
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static char 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_tofile(self, args)
- arrayobject *self;
- PyObject *args;
- {
- PyObject *f;
- FILE *fp;
- if (!PyArg_Parse(args, "O", &f))
- return NULL;
- fp = PyFile_AsFile(f);
- if (fp == NULL) {
- PyErr_SetString(PyExc_TypeError, "arg must be open file");
- return NULL;
- }
- if (self->ob_size > 0) {
- if ((int)fwrite(self->ob_item, self->ob_descr->itemsize,
- self->ob_size, fp) != self->ob_size) {
- PyErr_SetFromErrno(PyExc_IOError);
- clearerr(fp);
- return NULL;
- }
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static char 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_fromlist(self, args)
- arrayobject *self;
- PyObject *args;
- {
- int n;
- PyObject *list;
- int itemsize = self->ob_descr->itemsize;
- if (!PyArg_Parse(args, "O", &list))
- return NULL;
- 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;
- int i;
- PyMem_RESIZE(item, char, (self->ob_size + n) * itemsize);
- if (item == NULL) {
- PyErr_NoMemory();
- return NULL;
- }
- self->ob_item = item;
- self->ob_size += n;
- for (i = 0; i < n; i++) {
- PyObject *v = PyList_GetItem(list, i);
- if ((*self->ob_descr->setitem)(self,
- self->ob_size - n + i, v) != 0) {
- self->ob_size -= n;
- PyMem_RESIZE(item, char,
- self->ob_size * itemsize);
- self->ob_item = item;
- return NULL;
- }
- }
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static char fromlist_doc [] =
- "fromlist(list)\n\
- \n\
- Append items to array from list.";
-
-
- static PyObject *
- array_tolist(self, args)
- arrayobject *self;
- PyObject *args;
- {
- PyObject *list = PyList_New(self->ob_size);
- int i;
- if (list == NULL)
- return NULL;
- for (i = 0; i < self->ob_size; i++) {
- PyObject *v = getarrayitem((PyObject *)self, i);
- if (v == NULL) {
- Py_DECREF(list);
- return NULL;
- }
- PyList_SetItem(list, i, v);
- }
- return list;
- }
-
- static char tolist_doc [] =
- "tolist() -> list\n\
- \n\
- Convert array to an ordinary list with the same items.";
-
-
- static PyObject *
- array_fromstring(self, args)
- arrayobject *self;
- PyObject *args;
- {
- char *str;
- int n;
- int itemsize = self->ob_descr->itemsize;
- if (!PyArg_Parse(args, "s#", &str, &n))
- 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;
- PyMem_RESIZE(item, char, (self->ob_size + n) * itemsize);
- if (item == NULL) {
- PyErr_NoMemory();
- return NULL;
- }
- self->ob_item = item;
- self->ob_size += n;
- memcpy(item + (self->ob_size - n) * itemsize,
- str, itemsize*n);
- }
- Py_INCREF(Py_None);
- return Py_None;
- }
-
- static char 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(self, args)
- arrayobject *self;
- PyObject *args;
- {
- if (!PyArg_Parse(args, ""))
- return NULL;
- return PyString_FromStringAndSize(self->ob_item,
- self->ob_size * self->ob_descr->itemsize);
- }
-
- static char tostring_doc [] =
- "tostring() -> string\n\
- \n\
- Convert the array to an array of machine values and return the string\n\
- representation.";
-
- PyMethodDef array_methods[] = {
- {"append", (PyCFunction)array_append, 0, append_doc},
- {"buffer_info", (PyCFunction)array_buffer_info, 0, buffer_info_doc},
- {"byteswap", (PyCFunction)array_byteswap, 0, byteswap_doc},
- /* {"count", (method)array_count},*/
- {"fromfile", (PyCFunction)array_fromfile, 0, fromfile_doc},
- {"fromlist", (PyCFunction)array_fromlist, 0, fromlist_doc},
- {"fromstring", (PyCFunction)array_fromstring, 0, fromstring_doc},
- /* {"index", (method)array_index},*/
- {"insert", (PyCFunction)array_insert, 0, insert_doc},
- {"read", (PyCFunction)array_fromfile, 0, fromfile_doc},
- /* {"remove", (method)array_remove},*/
- {"reverse", (PyCFunction)array_reverse, 0, reverse_doc},
- /* {"sort", (method)array_sort},*/
- {"tofile", (PyCFunction)array_tofile, 0, tofile_doc},
- {"tolist", (PyCFunction)array_tolist, 0, tolist_doc},
- {"tostring", (PyCFunction)array_tostring, 0, tostring_doc},
- {"write", (PyCFunction)array_tofile, 0, tofile_doc},
- {NULL, NULL} /* sentinel */
- };
-
- static PyObject *
- array_getattr(a, name)
- arrayobject *a;
- char *name;
- {
- if (strcmp(name, "typecode") == 0) {
- char tc = a->ob_descr->typecode;
- return PyString_FromStringAndSize(&tc, 1);
- }
- if (strcmp(name, "itemsize") == 0) {
- return PyInt_FromLong((long)a->ob_descr->itemsize);
- }
- if (strcmp(name, "__members__") == 0) {
- PyObject *list = PyList_New(2);
- if (list) {
- PyList_SetItem(list, 0,
- PyString_FromString("typecode"));
- PyList_SetItem(list, 1,
- PyString_FromString("itemsize"));
- if (PyErr_Occurred()) {
- Py_DECREF(list);
- list = NULL;
- }
- }
- return list;
- }
- return Py_FindMethod(array_methods, (PyObject *)a, name);
- }
-
- static int
- array_print(a, fp, flags)
- arrayobject *a;
- FILE *fp;
- int flags;
- {
- int ok = 0;
- int i, len;
- PyObject *v;
- len = a->ob_size;
- if (len == 0) {
- fprintf(fp, "array('%c')", a->ob_descr->typecode);
- return ok;
- }
- if (a->ob_descr->typecode == 'c') {
- fprintf(fp, "array('c', ");
- v = array_tostring(a, (PyObject *)NULL);
- ok = PyObject_Print(v, fp, 0);
- Py_XDECREF(v);
- fprintf(fp, ")");
- return ok;
- }
- fprintf(fp, "array('%c', [", a->ob_descr->typecode);
- for (i = 0; i < len && ok == 0; i++) {
- if (i > 0)
- fprintf(fp, ", ");
- v = (a->ob_descr->getitem)(a, i);
- ok = PyObject_Print(v, fp, 0);
- Py_XDECREF(v);
- }
- fprintf(fp, "])");
- return ok;
- }
-
- static PyObject *
- array_repr(a)
- arrayobject *a;
- {
- char buf[256];
- PyObject *s, *t, *comma, *v;
- int i, len;
- len = a->ob_size;
- if (len == 0) {
- sprintf(buf, "array('%c')", a->ob_descr->typecode);
- return PyString_FromString(buf);
- }
- if (a->ob_descr->typecode == 'c') {
- sprintf(buf, "array('c', ");
- s = PyString_FromString(buf);
- v = array_tostring(a, (PyObject *)NULL);
- t = PyObject_Repr(v);
- Py_XDECREF(v);
- PyString_ConcatAndDel(&s, t);
- PyString_ConcatAndDel(&s, PyString_FromString(")"));
- return s;
- }
- sprintf(buf, "array('%c', [", a->ob_descr->typecode);
- s = PyString_FromString(buf);
- comma = PyString_FromString(", ");
- for (i = 0; i < len && !PyErr_Occurred(); i++) {
- if (i > 0)
- PyString_Concat(&s, comma);
- v = (a->ob_descr->getitem)(a, i);
- t = PyObject_Repr(v);
- Py_XDECREF(v);
- PyString_ConcatAndDel(&s, t);
- }
- Py_XDECREF(comma);
- PyString_ConcatAndDel(&s, PyString_FromString("])"));
- return s;
- }
-
- static int
- array_buffer_getreadbuf(self, index, ptr)
- arrayobject *self;
- int index;
- const void **ptr;
- {
- if ( index != 0 ) {
- PyErr_SetString(PyExc_SystemError,
- "Accessing non-existent array segment");
- return -1;
- }
- *ptr = (void *)self->ob_item;
- return self->ob_size*self->ob_descr->itemsize;
- }
-
- static int
- array_buffer_getwritebuf(self, index, ptr)
- arrayobject *self;
- int index;
- const void **ptr;
- {
- if ( index != 0 ) {
- PyErr_SetString(PyExc_SystemError,
- "Accessing non-existent array segment");
- return -1;
- }
- *ptr = (void *)self->ob_item;
- return self->ob_size*self->ob_descr->itemsize;
- }
-
- static int
- array_buffer_getsegcount(self, lenp)
- arrayobject *self;
- int *lenp;
- {
- if ( lenp )
- *lenp = self->ob_size*self->ob_descr->itemsize;
- return 1;
- }
-
- static PySequenceMethods array_as_sequence = {
- (inquiry)array_length, /*sq_length*/
- (binaryfunc)array_concat, /*sq_concat*/
- (intargfunc)array_repeat, /*sq_repeat*/
- (intargfunc)array_item, /*sq_item*/
- (intintargfunc)array_slice, /*sq_slice*/
- (intobjargproc)array_ass_item, /*sq_ass_item*/
- (intintobjargproc)array_ass_slice, /*sq_ass_slice*/
- };
-
- static PyBufferProcs array_as_buffer = {
- (getreadbufferproc)array_buffer_getreadbuf,
- (getwritebufferproc)array_buffer_getwritebuf,
- (getsegcountproc)array_buffer_getsegcount,
- };
-
-
-
-
- static PyObject *
- a_array(self, args)
- PyObject *self;
- PyObject *args;
- {
- char c;
- PyObject *initial = NULL;
- struct arraydescr *descr;
- if (!PyArg_Parse(args, "c", &c)) {
- PyErr_Clear();
- if (!PyArg_Parse(args, "(cO)", &c, &initial))
- return NULL;
- if (!PyList_Check(initial) && !PyString_Check(initial)) {
- PyErr_SetString(PyExc_TypeError,
- "array initializer must be list or string");
- return NULL;
- }
- }
- for (descr = descriptors; descr->typecode != '\0'; descr++) {
- if (descr->typecode == c) {
- PyObject *a;
- int len;
- if (initial == NULL || !PyList_Check(initial))
- len = 0;
- else
- len = PyList_Size(initial);
- a = newarrayobject(len, descr);
- if (a == NULL)
- return NULL;
- if (len > 0) {
- int i;
- for (i = 0; i < len; i++) {
- PyObject *v =
- PyList_GetItem(initial, i);
- if (setarrayitem(a, i, v) != 0) {
- Py_DECREF(a);
- return NULL;
- }
- }
- }
- if (initial != NULL && PyString_Check(initial)) {
- PyObject *v =
- array_fromstring((arrayobject *)a, initial);
- if (v == NULL) {
- Py_DECREF(a);
- return NULL;
- }
- Py_DECREF(v);
- }
- return a;
- }
- }
- PyErr_SetString(PyExc_ValueError,
- "bad typecode (must be c, b, B, h, H, i, I, l, L, f or d)");
- return NULL;
- }
-
- static char a_array_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\
- or a string.";
-
- static PyMethodDef a_methods[] = {
- {"array", a_array, 0, a_array_doc},
- {NULL, NULL} /* sentinel */
- };
-
- static char module_doc [] =
- "This module defines a new 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\
- '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\
- Functions:\n\
- \n\
- array(typecode [, initializer]) -- create a new array\n\
- \n\
- Special Objects:\n\
- \n\
- ArrayType -- type object for array objects\n\
- ";
-
- static char arraytype_doc [] =
- "An array represents 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\
- fromfile() -- read items from a file object\n\
- fromlist() -- append items from the list\n\
- fromstring() -- append items from the string\n\
- insert() -- insert a new item into the array at a provided position\n\
- read() -- DEPRECATED, use fromfile()\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\
- Variables:\n\
- \n\
- typecode -- the typecode character used to create the array\n\
- itemsize -- the length in bytes of one array item\n\
- ";
-
- statichere PyTypeObject Arraytype = {
- PyObject_HEAD_INIT(&PyType_Type)
- 0,
- "array",
- sizeof(arrayobject),
- 0,
- (destructor)array_dealloc, /*tp_dealloc*/
- (printfunc)array_print, /*tp_print*/
- (getattrfunc)array_getattr, /*tp_getattr*/
- 0, /*tp_setattr*/
- (cmpfunc)array_compare, /*tp_compare*/
- (reprfunc)array_repr, /*tp_repr*/
- 0, /*tp_as_number*/
- &array_as_sequence, /*tp_as_sequence*/
- 0, /*tp_as_mapping*/
- 0, /*tp_hash*/
- 0, /*tp_call*/
- 0, /*tp_str*/
- 0, /*tp_getattro*/
- 0, /*tp_setattro*/
- &array_as_buffer, /*tp_as_buffer*/
- 0, /*tp_xxx4*/
- arraytype_doc, /*tp_doc*/
- };
-
- DL_EXPORT(void)
- initarray()
- {
- PyObject *m, *d;
- m = Py_InitModule3("array", a_methods, module_doc);
- d = PyModule_GetDict(m);
- PyDict_SetItemString(d, "ArrayType", (PyObject *)&Arraytype);
- /* No need to check the error here, the caller will do that */
- }
-