794 lines
15 KiB
C
794 lines
15 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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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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/* List object implementation */
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#include "allobjects.h"
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#include "modsupport.h"
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#include "ceval.h"
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#ifdef STDC_HEADERS
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#include <stddef.h>
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#else
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#include <sys/types.h> /* For size_t */
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#endif
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#define ROUNDUP(n, block) ((((n)+(block)-1)/(block))*(block))
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static int
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roundup(n)
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int n;
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{
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if (n < 500)
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return ROUNDUP(n, 10);
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else
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return ROUNDUP(n, 100);
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}
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#define NRESIZE(var, type, nitems) RESIZE(var, type, roundup(nitems))
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object *
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newlistobject(size)
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int size;
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{
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int i;
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listobject *op;
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size_t nbytes;
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if (size < 0) {
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err_badcall();
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return NULL;
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}
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nbytes = size * sizeof(object *);
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/* Check for overflow */
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if (nbytes / sizeof(object *) != size) {
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return err_nomem();
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}
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op = (listobject *) malloc(sizeof(listobject));
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if (op == NULL) {
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return err_nomem();
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}
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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 = (object **) malloc(nbytes);
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if (op->ob_item == NULL) {
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free((ANY *)op);
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return err_nomem();
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}
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}
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op->ob_type = &Listtype;
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op->ob_size = size;
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for (i = 0; i < size; i++)
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op->ob_item[i] = NULL;
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NEWREF(op);
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return (object *) op;
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}
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int
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getlistsize(op)
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object *op;
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{
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if (!is_listobject(op)) {
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err_badcall();
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return -1;
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}
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else
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return ((listobject *)op) -> ob_size;
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}
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object *
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getlistitem(op, i)
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object *op;
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int i;
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{
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if (!is_listobject(op)) {
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err_badcall();
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return NULL;
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}
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if (i < 0 || i >= ((listobject *)op) -> ob_size) {
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err_setstr(IndexError, "list index out of range");
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return NULL;
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}
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return ((listobject *)op) -> ob_item[i];
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}
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int
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setlistitem(op, i, newitem)
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register object *op;
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register int i;
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register object *newitem;
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{
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register object *olditem;
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if (!is_listobject(op)) {
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XDECREF(newitem);
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err_badcall();
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return -1;
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}
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if (i < 0 || i >= ((listobject *)op) -> ob_size) {
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XDECREF(newitem);
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err_setstr(IndexError, "list assignment index out of range");
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return -1;
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}
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olditem = ((listobject *)op) -> ob_item[i];
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((listobject *)op) -> ob_item[i] = newitem;
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XDECREF(olditem);
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return 0;
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}
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static int
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ins1(self, where, v)
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listobject *self;
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int where;
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object *v;
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{
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int i;
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object **items;
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if (v == NULL) {
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err_badcall();
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return -1;
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}
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items = self->ob_item;
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NRESIZE(items, object *, self->ob_size+1);
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if (items == NULL) {
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err_nomem();
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return -1;
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}
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if (where < 0)
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where = 0;
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if (where > self->ob_size)
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where = self->ob_size;
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for (i = self->ob_size; --i >= where; )
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items[i+1] = items[i];
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INCREF(v);
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items[where] = v;
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self->ob_item = items;
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self->ob_size++;
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return 0;
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}
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int
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inslistitem(op, where, newitem)
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object *op;
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int where;
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object *newitem;
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{
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if (!is_listobject(op)) {
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err_badcall();
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return -1;
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}
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return ins1((listobject *)op, where, newitem);
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}
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int
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addlistitem(op, newitem)
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object *op;
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object *newitem;
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{
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if (!is_listobject(op)) {
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err_badcall();
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return -1;
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}
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return ins1((listobject *)op,
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(int) ((listobject *)op)->ob_size, newitem);
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}
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/* Methods */
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static void
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list_dealloc(op)
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listobject *op;
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{
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int i;
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if (op->ob_item != NULL) {
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for (i = 0; i < op->ob_size; i++) {
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XDECREF(op->ob_item[i]);
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}
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free((ANY *)op->ob_item);
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}
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free((ANY *)op);
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}
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static int
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list_print(op, fp, flags)
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listobject *op;
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FILE *fp;
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int flags;
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{
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int i;
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fprintf(fp, "[");
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for (i = 0; i < op->ob_size; i++) {
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if (i > 0)
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fprintf(fp, ", ");
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if (printobject(op->ob_item[i], fp, 0) != 0)
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return -1;
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}
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fprintf(fp, "]");
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return 0;
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}
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static object *
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list_repr(v)
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listobject *v;
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{
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object *s, *comma;
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int i;
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s = newstringobject("[");
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comma = newstringobject(", ");
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for (i = 0; i < v->ob_size && s != NULL; i++) {
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if (i > 0)
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joinstring(&s, comma);
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joinstring_decref(&s, reprobject(v->ob_item[i]));
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}
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XDECREF(comma);
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joinstring_decref(&s, newstringobject("]"));
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return s;
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}
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static int
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list_compare(v, w)
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listobject *v, *w;
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{
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int len = (v->ob_size < w->ob_size) ? v->ob_size : w->ob_size;
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int i;
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for (i = 0; i < len; i++) {
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int cmp = cmpobject(v->ob_item[i], w->ob_item[i]);
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if (cmp != 0)
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return cmp;
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}
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return v->ob_size - w->ob_size;
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}
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static int
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list_length(a)
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listobject *a;
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{
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return a->ob_size;
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}
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static object *
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list_item(a, i)
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listobject *a;
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int i;
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{
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if (i < 0 || i >= a->ob_size) {
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err_setstr(IndexError, "list index out of range");
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return NULL;
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}
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INCREF(a->ob_item[i]);
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return a->ob_item[i];
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}
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static object *
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list_slice(a, ilow, ihigh)
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listobject *a;
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int ilow, ihigh;
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{
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listobject *np;
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int i;
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if (ilow < 0)
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ilow = 0;
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else if (ilow > a->ob_size)
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ilow = a->ob_size;
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if (ihigh < 0)
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ihigh = 0;
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if (ihigh < ilow)
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ihigh = ilow;
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else if (ihigh > a->ob_size)
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ihigh = a->ob_size;
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np = (listobject *) newlistobject(ihigh - ilow);
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if (np == NULL)
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return NULL;
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for (i = ilow; i < ihigh; i++) {
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object *v = a->ob_item[i];
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INCREF(v);
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np->ob_item[i - ilow] = v;
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}
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return (object *)np;
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}
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object *
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getlistslice(a, ilow, ihigh)
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object *a;
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int ilow, ihigh;
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{
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if (!is_listobject(a)) {
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err_badcall();
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return NULL;
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}
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return list_slice((listobject *)a, ilow, ihigh);
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}
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static object *
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list_concat(a, bb)
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listobject *a;
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object *bb;
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{
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int size;
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int i;
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listobject *np;
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if (!is_listobject(bb)) {
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err_badarg();
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return NULL;
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}
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#define b ((listobject *)bb)
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size = a->ob_size + b->ob_size;
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np = (listobject *) newlistobject(size);
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if (np == NULL) {
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return NULL;
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}
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for (i = 0; i < a->ob_size; i++) {
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object *v = a->ob_item[i];
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INCREF(v);
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np->ob_item[i] = v;
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}
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for (i = 0; i < b->ob_size; i++) {
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object *v = b->ob_item[i];
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INCREF(v);
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np->ob_item[i + a->ob_size] = v;
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}
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return (object *)np;
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#undef b
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}
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static object *
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list_repeat(a, n)
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listobject *a;
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int n;
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{
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int i, j;
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int size;
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listobject *np;
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object **p;
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if (n < 0)
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n = 0;
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size = a->ob_size * n;
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np = (listobject *) newlistobject(size);
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if (np == NULL)
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return NULL;
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p = np->ob_item;
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for (i = 0; i < n; i++) {
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for (j = 0; j < a->ob_size; j++) {
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*p = a->ob_item[j];
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INCREF(*p);
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p++;
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}
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}
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return (object *) np;
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}
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static int
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list_ass_slice(a, ilow, ihigh, v)
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listobject *a;
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int ilow, ihigh;
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object *v;
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{
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/* Because [X]DECREF can recursively invoke list operations on
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this list, we must postpone all [X]DECREF activity until
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after the list is back in its canonical shape. Therefore
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we must allocate an additional array, 'recycle', into which
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we temporarily copy the items that are deleted from the
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list. :-( */
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object **recycle, **p;
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object **item;
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int n; /* Size of replacement list */
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int d; /* Change in size */
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int k; /* Loop index */
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#define b ((listobject *)v)
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if (v == NULL)
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n = 0;
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else if (is_listobject(v)) {
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n = b->ob_size;
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if (a == b) {
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/* Special case "a[i:j] = a" -- copy b first */
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int ret;
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v = list_slice(b, 0, n);
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ret = list_ass_slice(a, ilow, ihigh, v);
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DECREF(v);
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return ret;
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}
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}
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else {
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err_badarg();
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return -1;
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}
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if (ilow < 0)
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ilow = 0;
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else if (ilow > a->ob_size)
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ilow = a->ob_size;
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if (ihigh < 0)
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ihigh = 0;
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if (ihigh < ilow)
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ihigh = ilow;
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else if (ihigh > a->ob_size)
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ihigh = a->ob_size;
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item = a->ob_item;
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d = n - (ihigh-ilow);
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if (ihigh > ilow)
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p = recycle = NEW(object *, (ihigh-ilow));
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else
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p = recycle = NULL;
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if (d <= 0) { /* Delete -d items; recycle ihigh-ilow items */
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for (k = ilow; k < ihigh; k++)
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*p++ = item[k];
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if (d < 0) {
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for (/*k = ihigh*/; k < a->ob_size; k++)
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item[k+d] = item[k];
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a->ob_size += d;
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NRESIZE(item, object *, a->ob_size); /* Can't fail */
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a->ob_item = item;
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}
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}
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else { /* Insert d items; recycle ihigh-ilow items */
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NRESIZE(item, object *, a->ob_size + d);
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if (item == NULL) {
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XDEL(recycle);
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err_nomem();
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return -1;
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}
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for (k = a->ob_size; --k >= ihigh; )
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item[k+d] = item[k];
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for (/*k = ihigh-1*/; k >= ilow; --k)
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*p++ = item[k];
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a->ob_item = item;
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a->ob_size += d;
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}
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for (k = 0; k < n; k++, ilow++) {
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object *w = b->ob_item[k];
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XINCREF(w);
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item[ilow] = w;
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}
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if (recycle) {
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while (--p >= recycle)
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XDECREF(*p);
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DEL(recycle);
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}
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return 0;
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#undef b
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}
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int
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setlistslice(a, ilow, ihigh, v)
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object *a;
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int ilow, ihigh;
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object *v;
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{
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if (!is_listobject(a)) {
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err_badcall();
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return -1;
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}
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return list_ass_slice((listobject *)a, ilow, ihigh, v);
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}
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static int
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list_ass_item(a, i, v)
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listobject *a;
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int i;
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object *v;
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{
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object *old_value;
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if (i < 0 || i >= a->ob_size) {
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err_setstr(IndexError, "list assignment index out of range");
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return -1;
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}
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if (v == NULL)
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return list_ass_slice(a, i, i+1, v);
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INCREF(v);
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old_value = a->ob_item[i];
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a->ob_item[i] = v;
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DECREF(old_value);
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return 0;
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}
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static object *
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ins(self, where, v)
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listobject *self;
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int where;
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object *v;
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{
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if (ins1(self, where, v) != 0)
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return NULL;
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INCREF(None);
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return None;
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}
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static object *
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listinsert(self, args)
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listobject *self;
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object *args;
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{
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int i;
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object *v;
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if (!getargs(args, "(iO)", &i, &v))
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return NULL;
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return ins(self, i, v);
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}
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static object *
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listappend(self, args)
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listobject *self;
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object *args;
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{
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object *v;
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if (!getargs(args, "O", &v))
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return NULL;
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return ins(self, (int) self->ob_size, v);
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}
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static object *comparefunc;
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static int
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cmp(v, w)
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const ANY *v, *w;
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{
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object *t, *res;
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long i;
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if (err_occurred())
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return 0;
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if (comparefunc == NULL)
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return cmpobject(* (object **) v, * (object **) w);
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/* Call the user-supplied comparison function */
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t = mkvalue("OO", * (object **) v, * (object **) w);
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if (t == NULL)
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return 0;
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res = call_object(comparefunc, t);
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DECREF(t);
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if (res == NULL)
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return 0;
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if (!is_intobject(res)) {
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err_setstr(TypeError, "comparison function should return int");
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i = 0;
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}
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else {
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i = getintvalue(res);
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if (i < 0)
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i = -1;
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else if (i > 0)
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i = 1;
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}
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DECREF(res);
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return (int) i;
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}
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static object *
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listsort(self, args)
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listobject *self;
|
|
object *args;
|
|
{
|
|
object *save_comparefunc;
|
|
if (self->ob_size <= 1) {
|
|
INCREF(None);
|
|
return None;
|
|
}
|
|
save_comparefunc = comparefunc;
|
|
comparefunc = args;
|
|
if (comparefunc != NULL) {
|
|
/* Test the comparison function for obvious errors */
|
|
(void) cmp((ANY *)&self->ob_item[0], (ANY *)&self->ob_item[1]);
|
|
if (err_occurred()) {
|
|
comparefunc = save_comparefunc;
|
|
return NULL;
|
|
}
|
|
}
|
|
qsort((char *)self->ob_item,
|
|
(int) self->ob_size, sizeof(object *), cmp);
|
|
comparefunc = save_comparefunc;
|
|
if (err_occurred())
|
|
return NULL;
|
|
INCREF(None);
|
|
return None;
|
|
}
|
|
|
|
static object *
|
|
listreverse(self, args)
|
|
listobject *self;
|
|
object *args;
|
|
{
|
|
register object **p, **q;
|
|
register object *tmp;
|
|
|
|
if (args != NULL) {
|
|
err_badarg();
|
|
return NULL;
|
|
}
|
|
|
|
if (self->ob_size > 1) {
|
|
for (p = self->ob_item, q = self->ob_item + self->ob_size - 1;
|
|
p < q; p++, q--) {
|
|
tmp = *p;
|
|
*p = *q;
|
|
*q = tmp;
|
|
}
|
|
}
|
|
|
|
INCREF(None);
|
|
return None;
|
|
}
|
|
|
|
int
|
|
reverselist(v)
|
|
object *v;
|
|
{
|
|
if (v == NULL || !is_listobject(v)) {
|
|
err_badcall();
|
|
return -1;
|
|
}
|
|
v = listreverse((listobject *)v, (object *)NULL);
|
|
if (v == NULL)
|
|
return -1;
|
|
DECREF(v);
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
sortlist(v)
|
|
object *v;
|
|
{
|
|
if (v == NULL || !is_listobject(v)) {
|
|
err_badcall();
|
|
return -1;
|
|
}
|
|
v = listsort((listobject *)v, (object *)NULL);
|
|
if (v == NULL)
|
|
return -1;
|
|
DECREF(v);
|
|
return 0;
|
|
}
|
|
|
|
object *
|
|
listtuple(v)
|
|
object *v;
|
|
{
|
|
object *w;
|
|
object **p;
|
|
int n;
|
|
if (v == NULL || !is_listobject(v)) {
|
|
err_badcall();
|
|
return NULL;
|
|
}
|
|
n = ((listobject *)v)->ob_size;
|
|
w = newtupleobject(n);
|
|
if (w == NULL)
|
|
return NULL;
|
|
p = ((tupleobject *)w)->ob_item;
|
|
memcpy((ANY *)p,
|
|
(ANY *)((listobject *)v)->ob_item,
|
|
n*sizeof(object *));
|
|
while (--n >= 0) {
|
|
INCREF(*p);
|
|
p++;
|
|
}
|
|
return w;
|
|
}
|
|
|
|
static object *
|
|
listindex(self, args)
|
|
listobject *self;
|
|
object *args;
|
|
{
|
|
int i;
|
|
|
|
if (args == NULL) {
|
|
err_badarg();
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < self->ob_size; i++) {
|
|
if (cmpobject(self->ob_item[i], args) == 0)
|
|
return newintobject((long)i);
|
|
}
|
|
err_setstr(ValueError, "list.index(x): x not in list");
|
|
return NULL;
|
|
}
|
|
|
|
static object *
|
|
listcount(self, args)
|
|
listobject *self;
|
|
object *args;
|
|
{
|
|
int count = 0;
|
|
int i;
|
|
|
|
if (args == NULL) {
|
|
err_badarg();
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < self->ob_size; i++) {
|
|
if (cmpobject(self->ob_item[i], args) == 0)
|
|
count++;
|
|
}
|
|
return newintobject((long)count);
|
|
}
|
|
|
|
static object *
|
|
listremove(self, args)
|
|
listobject *self;
|
|
object *args;
|
|
{
|
|
int i;
|
|
|
|
if (args == NULL) {
|
|
err_badarg();
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < self->ob_size; i++) {
|
|
if (cmpobject(self->ob_item[i], args) == 0) {
|
|
if (list_ass_slice(self, i, i+1, (object *)NULL) != 0)
|
|
return NULL;
|
|
INCREF(None);
|
|
return None;
|
|
}
|
|
|
|
}
|
|
err_setstr(ValueError, "list.remove(x): x not in list");
|
|
return NULL;
|
|
}
|
|
|
|
static struct methodlist list_methods[] = {
|
|
{"append", (method)listappend},
|
|
{"count", (method)listcount},
|
|
{"index", (method)listindex},
|
|
{"insert", (method)listinsert},
|
|
{"sort", (method)listsort, 0},
|
|
{"remove", (method)listremove},
|
|
{"reverse", (method)listreverse},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static object *
|
|
list_getattr(f, name)
|
|
listobject *f;
|
|
char *name;
|
|
{
|
|
return findmethod(list_methods, (object *)f, name);
|
|
}
|
|
|
|
static sequence_methods list_as_sequence = {
|
|
(inquiry)list_length, /*sq_length*/
|
|
(binaryfunc)list_concat, /*sq_concat*/
|
|
(intargfunc)list_repeat, /*sq_repeat*/
|
|
(intargfunc)list_item, /*sq_item*/
|
|
(intintargfunc)list_slice, /*sq_slice*/
|
|
(intobjargproc)list_ass_item, /*sq_ass_item*/
|
|
(intintobjargproc)list_ass_slice, /*sq_ass_slice*/
|
|
};
|
|
|
|
typeobject Listtype = {
|
|
OB_HEAD_INIT(&Typetype)
|
|
0,
|
|
"list",
|
|
sizeof(listobject),
|
|
0,
|
|
(destructor)list_dealloc, /*tp_dealloc*/
|
|
(printfunc)list_print, /*tp_print*/
|
|
(getattrfunc)list_getattr, /*tp_getattr*/
|
|
0, /*tp_setattr*/
|
|
(cmpfunc)list_compare, /*tp_compare*/
|
|
(reprfunc)list_repr, /*tp_repr*/
|
|
0, /*tp_as_number*/
|
|
&list_as_sequence, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
};
|