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154 lines
3.4 KiB
C
154 lines
3.4 KiB
C
/***********************************************************
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Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Range object implementation */
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#include "allobjects.h"
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typedef struct {
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OB_HEAD
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long start;
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long step;
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long len;
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} rangeobject;
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object *
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newrangeobject(start, len, step)
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long start, len, step;
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{
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rangeobject *obj = (rangeobject *) newobject(&Rangetype);
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obj->start = start;
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obj->len = len;
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obj->step = step;
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return (object *) obj;
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}
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static void
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range_dealloc(r)
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rangeobject *r;
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{
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DEL(r);
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}
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static object *
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range_item(r, i)
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rangeobject *r;
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int i;
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{
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if (i < 0 || i >= r->len) {
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err_setstr(IndexError, "range object index out of range");
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return NULL;
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}
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return newintobject(r->start + i * r->step);
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}
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static int
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range_length(r)
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rangeobject *r;
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{
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return r->len;
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}
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static object *
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range_repr(r)
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rangeobject *r;
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{
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char buf[80];
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sprintf(buf, "xrange(%ld, %ld, %ld)",
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r->start, r->start + r->len * r->step, r->step);
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return newstringobject(buf);
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}
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static int
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range_compare(r1, r2)
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rangeobject *r1, *r2;
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{
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if (r1->start != r2->start)
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return r1->start - r2->start;
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else if (r1->step != r2->step)
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return r1->step - r2->step;
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else if (r1->len != r2->len)
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return r1->len - r2->len;
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}
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static object *
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range_concat(r, s)
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rangeobject *r;
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object *s;
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{
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err_setstr(TypeError, "concat not supported by xrange object");
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return NULL;
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}
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static object *
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range_repeat(r, n)
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rangeobject *r;
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int n;
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{
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err_setstr(TypeError, "repeat not supported by xrange object");
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return NULL;
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}
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static object *
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range_slice(r, i, j)
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rangeobject *r;
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int i, j;
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{
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err_setstr(TypeError, "slice not supported by xrange object");
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return NULL;
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}
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static sequence_methods range_as_sequence = {
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range_length, /*sq_length*/
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range_concat, /*sq_concat*/
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range_repeat, /*sq_repeat*/
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range_item, /*sq_item*/
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range_slice, /*sq_slice*/
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0, /*sq_ass_item*/
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0, /*sq_ass_slice*/
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};
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typeobject Rangetype = {
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OB_HEAD_INIT(&Typetype)
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0, /* Number of items for varobject */
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"xrange", /* Name of this type */
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sizeof(rangeobject), /* Basic object size */
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0, /* Item size for varobject */
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range_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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0, /*tp_getattr*/
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0, /*tp_setattr*/
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range_compare, /*tp_compare*/
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range_repr, /*tp_repr*/
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0, /*tp_as_number*/
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&range_as_sequence, /*tp_as_sequence*/
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0, /*tp_as_mapping*/
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};
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