зеркало из https://github.com/mozilla/pjs.git
1498 строки
34 KiB
C++
1498 строки
34 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "msgCore.h" // precompiled header...
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#include "prlog.h"
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#include "MailNewsTypes.h"
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#include "nsMsgKeySet.h"
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#include "prprf.h"
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#include "prmem.h"
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#if defined(DEBUG_seth_) || defined(DEBUG_sspitzer_)
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#define DEBUG_MSGKEYSET 1
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#endif
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/* A compressed encoding for sets of article. This is usually for lines from
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the newsrc, which have article lists like
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1-29627,29635,29658,32861-32863
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so the data has these properties:
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- strictly increasing
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- large subsequences of monotonically increasing ranges
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- gaps in the set are usually small, but not always
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- consecutive ranges tend to be large
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The biggest win is to run-length encode the data, storing ranges as two
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numbers (start+length or start,end). We could also store each number as a
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delta from the previous number for further compression, but that gets kind
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of tricky, since there are no guarentees about the sizes of the gaps, and
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we'd have to store variable-length words.
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Current data format:
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DATA := SIZE [ CHUNK ]*
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CHUNK := [ RANGE | VALUE ]
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RANGE := -LENGTH START
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START := VALUE
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LENGTH := PRInt32
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VALUE := a literal positive integer, for now
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it could also be an offset from the previous value.
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LENGTH could also perhaps be a less-than-32-bit quantity,
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at least most of the time.
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Lengths of CHUNKs are stored negative to distinguish the beginning of
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a chunk from a literal: negative means two-word sequence, positive
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means one-word sequence.
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0 represents a literal 0, but should not occur, and should never occur
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except in the first position.
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A length of -1 won't occur either, except temporarily - a sequence of
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two elements is represented as two literals, since they take up the same
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space.
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Another optimization we make is to notice that we typically ask the
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question ``is N a member of the set'' for increasing values of N. So the
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set holds a cache of the last value asked for, and can simply resume the
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search from there. */
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MOZ_DECL_CTOR_COUNTER(nsMsgKeySet)
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nsMsgKeySet::nsMsgKeySet(/* MSG_NewsHost* host*/)
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{
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MOZ_COUNT_CTOR(nsMsgKeySet);
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m_cached_value = -1;
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m_cached_value_index = 0;
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m_length = 0;
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m_data_size = 10;
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m_data = (PRInt32 *) PR_Malloc (sizeof (PRInt32) * m_data_size);
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#ifdef NEWSRC_DOES_HOST_STUFF
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m_host = host;
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#endif
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}
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nsMsgKeySet::~nsMsgKeySet()
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{
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MOZ_COUNT_DTOR(nsMsgKeySet);
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PR_FREEIF(m_data);
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}
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PRBool nsMsgKeySet::Grow()
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{
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PRInt32 new_size;
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PRInt32 *new_data;
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new_size = m_data_size * 2;
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new_data = (PRInt32 *) PR_REALLOC (m_data, sizeof (PRInt32) * new_size);
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if (! new_data)
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return PR_FALSE;
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m_data_size = new_size;
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m_data = new_data;
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return PR_TRUE;
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}
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nsMsgKeySet::nsMsgKeySet(const char* numbers /* , MSG_NewsHost* host */)
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{
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PRInt32 *head, *tail, *end;
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MOZ_COUNT_CTOR(nsMsgKeySet);
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#ifdef NEWSRC_DOES_HOST_STUFF
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m_host = host;
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#endif
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m_cached_value = -1;
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m_cached_value_index = 0;
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m_length = 0;
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m_data_size = 10;
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m_data = (PRInt32 *) PR_Malloc (sizeof (PRInt32) * m_data_size);
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if (!m_data) return;
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head = m_data;
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tail = head;
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end = head + m_data_size;
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if(!numbers) {
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return;
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}
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while (nsCRT::IsAsciiSpace (*numbers)) numbers++;
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while (*numbers) {
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PRInt32 from = 0;
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PRInt32 to;
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if (tail >= end - 4) {
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/* out of room! */
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PRInt32 tailo = tail - head;
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if (!Grow()) {
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PR_FREEIF(m_data);
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return;
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}
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/* data may have been relocated */
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head = m_data;
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tail = head + tailo;
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end = head + m_data_size;
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}
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while (nsCRT::IsAsciiSpace(*numbers)) numbers++;
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if (*numbers && !nsCRT::IsAsciiDigit(*numbers)) {
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break; /* illegal character */
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}
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while (nsCRT::IsAsciiDigit (*numbers)) {
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from = (from * 10) + (*numbers++ - '0');
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}
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while (nsCRT::IsAsciiSpace (*numbers)) numbers++;
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if (*numbers != '-') {
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to = from;
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} else {
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to = 0;
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numbers++;
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while (*numbers >= '0' && *numbers <= '9')
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to = (to * 10) + (*numbers++ - '0');
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while (nsCRT::IsAsciiSpace (*numbers)) numbers++;
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}
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if (to < from) to = from; /* illegal */
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/* This is a hack - if the newsrc file specifies a range 1-x as
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being read, we internally pretend that article 0 is read as well.
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(But if only 2-x are read, then 0 is not read.) This is needed
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because some servers think that article 0 is an article (I think)
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but some news readers (including Netscape 1.1) choke if the .newsrc
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file has lines beginning with 0... ### */
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if (from == 1) from = 0;
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if (to == from) {
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/* Write it as a literal */
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*tail = from;
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tail++;
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} else /* Write it as a range. */ {
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*tail = -(to - from);
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tail++;
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*tail = from;
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tail++;
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}
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while (*numbers == ',' || nsCRT::IsAsciiSpace (*numbers)) {
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numbers++;
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}
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}
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m_length = tail - head; /* size of data */
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}
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nsMsgKeySet*
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nsMsgKeySet::Create(/*MSG_NewsHost* host*/)
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{
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nsMsgKeySet* set = new nsMsgKeySet(/* host */);
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if (set && set->m_data == NULL) {
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delete set;
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set = NULL;
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}
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return set;
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}
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nsMsgKeySet*
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nsMsgKeySet::Create(const char* value /* , MSG_NewsHost* host */)
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{
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#ifdef DEBUG_MSGKEYSET
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printf("create from %s\n",value);
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#endif
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nsMsgKeySet* set = new nsMsgKeySet(value /* , host */);
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if (set && set->m_data == NULL) {
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delete set;
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set = NULL;
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}
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return set;
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}
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/* Returns the lowest non-member of the set greater than 0.
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*/
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PRInt32
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nsMsgKeySet::FirstNonMember ()
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{
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if (m_length <= 0) {
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return 1;
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} else if(m_data[0] < 0 && m_data[1] != 1 && m_data[1] != 0) {
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/* first range not equal to 0 or 1, always return 1 */
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return 1;
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} else if (m_data[0] < 0) {
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/* it's a range */
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/* If there is a range [N-M] we can presume that M+1 is not in the
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set. */
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return (m_data[1] - m_data[0] + 1);
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} else {
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/* it's a literal */
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if (m_data[0] == 1) {
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/* handle "1,..." */
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if (m_length > 1 && m_data[1] == 2) {
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/* This is "1,2,M-N,..." or "1,2,M,..." where M >= 4. Note
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that M will never be 3, because in that case we would have
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started with a range: "1-3,..." */
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return 3;
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} else {
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return 2; /* handle "1,M-N,.." or "1,M,..."
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where M >= 3; */
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}
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}
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else if (m_data[0] == 0) {
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/* handle "0,..." */
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if (m_length > 1 && m_data[1] == 1) {
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/* this is 0,1, (see above) */
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return 2;
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}
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else {
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return 1;
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}
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} else {
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/* handle "M,..." where M >= 2. */
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return 1;
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}
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}
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}
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nsresult
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nsMsgKeySet::Output(char **outputStr)
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{
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NS_ENSURE_ARG(outputStr);
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PRInt32 size;
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PRInt32 *head;
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PRInt32 *tail;
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PRInt32 *end;
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PRInt32 s_size;
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char *s_head;
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char *s, *s_end;
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PRInt32 last_art = -1;
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*outputStr = nsnull;
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size = m_length;
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head = m_data;
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tail = head;
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end = head + size;
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s_size = (size * 12) + 10; // dmb - try to make this allocation get used at least once.
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s_head = (char *) nsMemory::Alloc(s_size);
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s_head[0] = '\0'; // otherwise, s_head will contain garbage.
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s = s_head;
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s_end = s + s_size;
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if (! s) return NS_ERROR_OUT_OF_MEMORY;
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while (tail < end) {
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PRInt32 from;
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PRInt32 to;
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if (s > (s_end - (12 * 2 + 10))) { /* 12 bytes for each number (enough
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for "2147483647" aka 2^31-1),
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plus 10 bytes of slop. */
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PRInt32 so = s - s_head;
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s_size += 200;
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char* tmp = new char[s_size];
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if (tmp) PL_strcpy(tmp, s_head);
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nsMemory::Free(s_head);
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s_head = tmp;
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if (!s_head) return NS_ERROR_OUT_OF_MEMORY;
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s = s_head + so;
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s_end = s_head + s_size;
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}
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if (*tail < 0) {
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/* it's a range */
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from = tail[1];
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to = from + (-(tail[0]));
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tail += 2;
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}
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else /* it's a literal */
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{
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from = *tail;
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to = from;
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tail++;
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}
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if (from == 0) {
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from = 1; /* See 'hack' comment above ### */
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}
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if (from <= last_art) from = last_art + 1;
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if (from <= to) {
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if (from < to) {
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PR_snprintf(s, s_end - s, "%lu-%lu,", from, to);
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} else {
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PR_snprintf(s, s_end - s, "%lu,", from);
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}
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s += PL_strlen(s);
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last_art = to;
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}
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}
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if (last_art >= 0) {
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s--; /* Strip off the last ',' */
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}
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*s = 0;
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*outputStr = s_head;
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return NS_OK;
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}
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PRInt32
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nsMsgKeySet::GetLastMember()
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{
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if (m_length > 1)
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{
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PRInt32 nextToLast = m_data[m_length - 2];
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if (nextToLast < 0) // is range at end?
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{
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PRInt32 last = m_data[m_length - 1];
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return (-nextToLast + last - 1);
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}
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else // no, so last number must be last member
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{
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return m_data[m_length - 1];
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}
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}
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else if (m_length == 1)
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return m_data[0]; // must be only 1 read.
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else
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return 0;
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}
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void nsMsgKeySet::SetLastMember(PRInt32 newHighWaterMark)
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{
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if (newHighWaterMark < GetLastMember())
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{
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while (PR_TRUE)
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{
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if (m_length > 1)
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{
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PRInt32 nextToLast = m_data[m_length - 2];
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PRInt32 curHighWater;
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if (nextToLast < 0) // is range at end?
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{
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PRInt32 rangeStart = m_data[m_length - 1];
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PRInt32 rangeLength = -nextToLast;
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curHighWater = (rangeLength + rangeStart - 1);
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if (curHighWater > newHighWaterMark)
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{
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if (rangeStart > newHighWaterMark)
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{
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m_length -= 2; // throw away whole range
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}
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else if (rangeStart == newHighWaterMark)
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{
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// turn range into single element.
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m_data[m_length - 2] = newHighWaterMark;
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m_length--;
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break;
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}
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else // just shorten range
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{
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m_data[m_length - 2] = -(newHighWaterMark - rangeStart);
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break;
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}
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}
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else {
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// prevent the infinite loop
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// see bug #13062
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break;
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}
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}
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else if (m_data[m_length - 1] > newHighWaterMark) // no, so last number must be last member
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{
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m_length--;
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}
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else
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break;
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}
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else
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break;
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}
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// well, the whole range is probably invalid, because the server probably re-ordered ids,
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// but what can you do?
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#ifdef NEWSRC_DOES_HOST_STUFF
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if (m_host)
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m_host->MarkDirty();
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#endif
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}
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}
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PRInt32
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nsMsgKeySet::GetFirstMember()
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{
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if (m_length > 1)
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{
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PRInt32 first = m_data[0];
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if (first < 0) // is range at start?
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{
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PRInt32 second = m_data[1];
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return (second);
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}
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else // no, so first number must be first member
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{
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return m_data[0];
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}
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}
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else if (m_length == 1)
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return m_data[0]; // must be only 1 read.
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else
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return 0;
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}
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/* Re-compresses a `nsMsgKeySet' object.
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The assumption is made that the `nsMsgKeySet' is syntactically correct
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(all ranges have a length of at least 1, and all values are non-
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decreasing) but will optimize the compression, for example, merging
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consecutive literals or ranges into one range.
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Returns PR_TRUE if successful, PR_FALSE if there wasn't enough memory to
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allocate scratch space.
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#### This should be changed to modify the buffer in place.
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Also note that we never call Optimize() unless we actually changed
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something, so it's a great place to tell the MSG_NewsHost* that something
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changed.
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*/
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PRBool
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nsMsgKeySet::Optimize()
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{
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PRInt32 input_size;
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PRInt32 output_size;
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PRInt32 *input_tail;
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PRInt32 *output_data;
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PRInt32 *output_tail;
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PRInt32 *input_end;
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PRInt32 *output_end;
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input_size = m_length;
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output_size = input_size + 1;
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input_tail = m_data;
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output_data = (PRInt32 *) PR_Malloc (sizeof (PRInt32) * output_size);
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output_tail = output_data;
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input_end = input_tail + input_size;
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output_end = output_data + output_size;
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if (!output_data) return PR_FALSE;
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/* We're going to modify the set, so invalidate the cache. */
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m_cached_value = -1;
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while (input_tail < input_end) {
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PRInt32 from, to;
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PRBool range_p = (*input_tail < 0);
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if (range_p) {
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/* it's a range */
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from = input_tail[1];
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to = from + (-(input_tail[0]));
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/* Copy it over */
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*output_tail++ = *input_tail++;
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*output_tail++ = *input_tail++;
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} else {
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/* it's a literal */
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from = *input_tail;
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to = from;
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/* Copy it over */
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*output_tail++ = *input_tail++;
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}
|
|
NS_ASSERTION(output_tail < output_end, "invalid end of output string");
|
|
if (output_tail >= output_end) {
|
|
PR_Free(output_data);
|
|
return PR_FALSE;
|
|
}
|
|
|
|
/* As long as this chunk is followed by consecutive chunks,
|
|
keep extending it. */
|
|
while (input_tail < input_end &&
|
|
((*input_tail > 0 && /* literal... */
|
|
*input_tail == to + 1) || /* ...and consecutive, or */
|
|
(*input_tail <= 0 && /* range... */
|
|
input_tail[1] == to + 1)) /* ...and consecutive. */
|
|
) {
|
|
if (! range_p) {
|
|
/* convert the literal to a range. */
|
|
output_tail++;
|
|
output_tail [-2] = 0;
|
|
output_tail [-1] = from;
|
|
range_p = PR_TRUE;
|
|
}
|
|
|
|
if (*input_tail > 0) { /* literal */
|
|
output_tail[-2]--; /* increase length by 1 */
|
|
to++;
|
|
input_tail++;
|
|
} else {
|
|
PRInt32 L2 = (- *input_tail) + 1;
|
|
output_tail[-2] -= L2; /* increase length by N */
|
|
to += L2;
|
|
input_tail += 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
PR_Free (m_data);
|
|
m_data = output_data;
|
|
m_data_size = output_size;
|
|
m_length = output_tail - output_data;
|
|
|
|
/* One last pass to turn [N - N+1] into [N, N+1]. */
|
|
output_tail = output_data;
|
|
output_end = output_tail + m_length;
|
|
while (output_tail < output_end) {
|
|
if (*output_tail < 0) {
|
|
/* it's a range */
|
|
if (output_tail[0] == -1) {
|
|
output_tail[0] = output_tail[1];
|
|
output_tail[1]++;
|
|
}
|
|
output_tail += 2;
|
|
} else {
|
|
/* it's a literal */
|
|
output_tail++;
|
|
}
|
|
}
|
|
|
|
#ifdef NEWSRC_DOES_HOST_STUFF
|
|
if (m_host) m_host->MarkDirty();
|
|
#endif
|
|
return PR_TRUE;
|
|
}
|
|
|
|
|
|
|
|
PRBool
|
|
nsMsgKeySet::IsMember(PRInt32 number)
|
|
{
|
|
PRBool value = PR_FALSE;
|
|
PRInt32 size;
|
|
PRInt32 *head;
|
|
PRInt32 *tail;
|
|
PRInt32 *end;
|
|
|
|
size = m_length;
|
|
head = m_data;
|
|
tail = head;
|
|
end = head + size;
|
|
|
|
/* If there is a value cached, and that value is smaller than the
|
|
value we're looking for, skip forward that far. */
|
|
if (m_cached_value > 0 &&
|
|
m_cached_value < number) {
|
|
tail += m_cached_value_index;
|
|
}
|
|
|
|
while (tail < end) {
|
|
if (*tail < 0) {
|
|
/* it's a range */
|
|
PRInt32 from = tail[1];
|
|
PRInt32 to = from + (-(tail[0]));
|
|
if (from > number) {
|
|
/* This range begins after the number - we've passed it. */
|
|
value = PR_FALSE;
|
|
goto DONE;
|
|
} else if (to >= number) {
|
|
/* In range. */
|
|
value = PR_TRUE;
|
|
goto DONE;
|
|
} else {
|
|
tail += 2;
|
|
}
|
|
}
|
|
else {
|
|
/* it's a literal */
|
|
if (*tail == number) {
|
|
/* bang */
|
|
value = PR_TRUE;
|
|
goto DONE;
|
|
} else if (*tail > number) {
|
|
/* This literal is after the number - we've passed it. */
|
|
value = PR_FALSE;
|
|
goto DONE;
|
|
} else {
|
|
tail++;
|
|
}
|
|
}
|
|
}
|
|
|
|
DONE:
|
|
/* Store the position of this chunk for next time. */
|
|
m_cached_value = number;
|
|
m_cached_value_index = tail - head;
|
|
|
|
return value;
|
|
}
|
|
|
|
|
|
int
|
|
nsMsgKeySet::Add(PRInt32 number)
|
|
{
|
|
PRInt32 size;
|
|
PRInt32 *head;
|
|
PRInt32 *tail;
|
|
PRInt32 *end;
|
|
|
|
#ifdef DEBUG_MSGKEYSET
|
|
printf("add %d\n",number);
|
|
#endif
|
|
|
|
size = m_length;
|
|
head = m_data;
|
|
tail = head;
|
|
end = head + size;
|
|
|
|
NS_ASSERTION (number >= 0, "can't have negative items");
|
|
if (number < 0)
|
|
return 0;
|
|
|
|
/* We're going to modify the set, so invalidate the cache. */
|
|
m_cached_value = -1;
|
|
|
|
while (tail < end) {
|
|
if (*tail < 0) {
|
|
/* it's a range */
|
|
PRInt32 from = tail[1];
|
|
PRInt32 to = from + (-(tail[0]));
|
|
|
|
if (from <= number && to >= number) {
|
|
/* This number is already present - we don't need to do
|
|
anything. */
|
|
return 0;
|
|
}
|
|
|
|
if (to > number) {
|
|
/* We have found the point before which the new number
|
|
should be inserted. */
|
|
break;
|
|
}
|
|
|
|
tail += 2;
|
|
} else {
|
|
/* it's a literal */
|
|
if (*tail == number) {
|
|
/* This number is already present - we don't need to do
|
|
anything. */
|
|
return 0;
|
|
}
|
|
|
|
if (*tail > number) {
|
|
/* We have found the point before which the new number
|
|
should be inserted. */
|
|
break;
|
|
}
|
|
|
|
tail++;
|
|
}
|
|
}
|
|
|
|
/* At this point, `tail' points to a position in the set which represents
|
|
a value greater than `new'; or it is at `end'. In the interest of
|
|
avoiding massive duplication of code, simply insert a literal here and
|
|
then run the optimizer.
|
|
*/
|
|
int mid = (tail - head);
|
|
|
|
if (m_data_size <= m_length + 1) {
|
|
int endo = end - head;
|
|
if (!Grow()) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
head = m_data;
|
|
end = head + endo;
|
|
}
|
|
|
|
if (tail == end) {
|
|
/* at the end */
|
|
/* Add a literal to the end. */
|
|
m_data[m_length++] = number;
|
|
} else {
|
|
/* need to insert (or edit) in the middle */
|
|
PRInt32 i;
|
|
for (i = size; i > mid; i--) {
|
|
m_data[i] = m_data[i-1];
|
|
}
|
|
m_data[i] = number;
|
|
m_length++;
|
|
}
|
|
|
|
Optimize();
|
|
return 1;
|
|
}
|
|
|
|
|
|
|
|
int
|
|
nsMsgKeySet::Remove(PRInt32 number)
|
|
{
|
|
PRInt32 size;
|
|
PRInt32 *head;
|
|
PRInt32 *tail;
|
|
PRInt32 *end;
|
|
#ifdef DEBUG_MSGKEYSET
|
|
printf("remove %d\n",number);
|
|
#endif
|
|
|
|
size = m_length;
|
|
head = m_data;
|
|
tail = head;
|
|
end = head + size;
|
|
|
|
// **** I am not sure this is a right thing to comment the following
|
|
// statements out. The reason for this is due to the implementation of
|
|
// offline save draft and template. We use faked UIDs (negative ids) for
|
|
// offline draft and template in order to distinguish them from real
|
|
// UID. David I need your help here. **** jt
|
|
|
|
// PR_ASSERT(number >= 0);
|
|
// if (number < 0) {
|
|
// return -1;
|
|
/// }
|
|
|
|
/* We're going to modify the set, so invalidate the cache. */
|
|
m_cached_value = -1;
|
|
|
|
while (tail < end) {
|
|
PRInt32 mid = (tail - m_data);
|
|
|
|
if (*tail < 0) {
|
|
/* it's a range */
|
|
PRInt32 from = tail[1];
|
|
PRInt32 to = from + (-(tail[0]));
|
|
|
|
if (number < from || number > to) {
|
|
/* Not this range */
|
|
tail += 2;
|
|
continue;
|
|
}
|
|
|
|
if (to == from + 1) {
|
|
/* If this is a range [N - N+1] and we are removing M
|
|
(which must be either N or N+1) replace it with a
|
|
literal. This reduces the length by 1. */
|
|
m_data[mid] = (number == from ? to : from);
|
|
while (++mid < m_length) {
|
|
m_data[mid] = m_data[mid+1];
|
|
}
|
|
m_length--;
|
|
Optimize();
|
|
return 1;
|
|
} else if (to == from + 2) {
|
|
/* If this is a range [N - N+2] and we are removing M,
|
|
replace it with the literals L,M (that is, either
|
|
(N, N+1), (N, N+2), or (N+1, N+2). The overall
|
|
length remains the same. */
|
|
m_data[mid] = from;
|
|
m_data[mid+1] = to;
|
|
if (from == number) {
|
|
m_data[mid] = from+1;
|
|
} else if (to == number) {
|
|
m_data[mid+1] = to-1;
|
|
}
|
|
Optimize();
|
|
return 1;
|
|
} else if (from == number) {
|
|
/* This number is at the beginning of a long range (meaning a
|
|
range which will still be long enough to remain a range.)
|
|
Increase start and reduce length of the range. */
|
|
m_data[mid]++;
|
|
m_data[mid+1]++;
|
|
Optimize();
|
|
return 1;
|
|
} else if (to == number) {
|
|
/* This number is at the end of a long range (meaning a range
|
|
which will still be long enough to remain a range.)
|
|
Just decrease the length of the range. */
|
|
m_data[mid]++;
|
|
Optimize();
|
|
return 1;
|
|
} else {
|
|
/* The number being deleted is in the middle of a range which
|
|
must be split. This increases overall length by 2.
|
|
*/
|
|
PRInt32 i;
|
|
int endo = end - head;
|
|
if (m_data_size - m_length <= 2) {
|
|
if (!Grow()) return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
head = m_data;
|
|
end = head + endo;
|
|
|
|
for (i = m_length + 2; i > mid + 2; i--) {
|
|
m_data[i] = m_data[i-2];
|
|
}
|
|
|
|
m_data[mid] = (- (number - from - 1));
|
|
m_data[mid+1] = from;
|
|
m_data[mid+2] = (- (to - number - 1));
|
|
m_data[mid+3] = number + 1;
|
|
m_length += 2;
|
|
|
|
/* Oops, if we've ended up with a range with a 0 length,
|
|
which is illegal, convert it to a literal, which reduces
|
|
the overall length by 1. */
|
|
if (m_data[mid] == 0) {
|
|
/* first range */
|
|
m_data[mid] = m_data[mid+1];
|
|
for (i = mid + 1; i < m_length; i++) {
|
|
m_data[i] = m_data[i+1];
|
|
}
|
|
m_length--;
|
|
}
|
|
if (m_data[mid+2] == 0) {
|
|
/* second range */
|
|
m_data[mid+2] = m_data[mid+3];
|
|
for (i = mid + 3; i < m_length; i++) {
|
|
m_data[i] = m_data[i+1];
|
|
}
|
|
m_length--;
|
|
}
|
|
Optimize();
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* it's a literal */
|
|
if (*tail != number) {
|
|
/* Not this literal */
|
|
tail++;
|
|
continue;
|
|
}
|
|
|
|
/* Excise this literal. */
|
|
m_length--;
|
|
while (mid < m_length) {
|
|
m_data[mid] = m_data[mid+1];
|
|
mid++;
|
|
}
|
|
Optimize();
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* It wasn't here at all. */
|
|
return 0;
|
|
}
|
|
|
|
|
|
static PRInt32*
|
|
msg_emit_range(PRInt32* tmp, PRInt32 a, PRInt32 b)
|
|
{
|
|
if (a == b) {
|
|
*tmp++ = a;
|
|
} else {
|
|
NS_ASSERTION(a < b && a >= 0, "range is out of order");
|
|
*tmp++ = -(b - a);
|
|
*tmp++ = a;
|
|
}
|
|
return tmp;
|
|
}
|
|
|
|
|
|
int
|
|
nsMsgKeySet::AddRange(PRInt32 start, PRInt32 end)
|
|
{
|
|
PRInt32 tmplength;
|
|
PRInt32* tmp;
|
|
PRInt32* in;
|
|
PRInt32* out;
|
|
PRInt32* tail;
|
|
PRInt32 a;
|
|
PRInt32 b;
|
|
PRBool didit = PR_FALSE;
|
|
|
|
/* We're going to modify the set, so invalidate the cache. */
|
|
m_cached_value = -1;
|
|
|
|
NS_ASSERTION(start <= end, "invalid range");
|
|
if (start > end) return -1;
|
|
|
|
if (start == end) {
|
|
return Add(start);
|
|
}
|
|
|
|
tmplength = m_length + 2;
|
|
tmp = (PRInt32*) PR_Malloc(sizeof(PRInt32) * tmplength);
|
|
|
|
if (!tmp) return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
in = m_data;
|
|
out = tmp;
|
|
tail = in + m_length;
|
|
|
|
#define EMIT(x, y) out = msg_emit_range(out, x, y)
|
|
|
|
while (in < tail) {
|
|
// Set [a,b] to be this range.
|
|
if (*in < 0) {
|
|
b = - *in++;
|
|
a = *in++;
|
|
b += a;
|
|
} else {
|
|
a = b = *in++;
|
|
}
|
|
|
|
if (a <= start && b >= end) {
|
|
// We already have the entire range marked.
|
|
PR_Free(tmp);
|
|
return 0;
|
|
}
|
|
if (start > b + 1) {
|
|
// No overlap yet.
|
|
EMIT(a, b);
|
|
} else if (end < a - 1) {
|
|
// No overlap, and we passed it.
|
|
EMIT(start, end);
|
|
EMIT(a, b);
|
|
didit = PR_TRUE;
|
|
break;
|
|
} else {
|
|
// The ranges overlap. Suck this range into our new range, and
|
|
// keep looking for other ranges that might overlap.
|
|
start = start < a ? start : a;
|
|
end = end > b ? end : b;
|
|
}
|
|
}
|
|
if (!didit) EMIT(start, end);
|
|
while (in < tail) {
|
|
*out++ = *in++;
|
|
}
|
|
|
|
#undef EMIT
|
|
|
|
PR_Free(m_data);
|
|
m_data = tmp;
|
|
m_length = out - tmp;
|
|
m_data_size = tmplength;
|
|
#ifdef NEWSRC_DOES_HOST_STUFF
|
|
if (m_host) m_host->MarkDirty();
|
|
#endif
|
|
return 1;
|
|
}
|
|
|
|
PRInt32
|
|
nsMsgKeySet::CountMissingInRange(PRInt32 range_start, PRInt32 range_end)
|
|
{
|
|
PRInt32 count;
|
|
PRInt32 *head;
|
|
PRInt32 *tail;
|
|
PRInt32 *end;
|
|
|
|
NS_ASSERTION (range_start >= 0 && range_end >= 0 && range_end >= range_start, "invalid range");
|
|
if (range_start < 0 || range_end < 0 || range_end < range_start) return -1;
|
|
|
|
head = m_data;
|
|
tail = head;
|
|
end = head + m_length;
|
|
|
|
count = range_end - range_start + 1;
|
|
|
|
while (tail < end) {
|
|
if (*tail < 0) {
|
|
/* it's a range */
|
|
PRInt32 from = tail[1];
|
|
PRInt32 to = from + (-(tail[0]));
|
|
if (from < range_start) from = range_start;
|
|
if (to > range_end) to = range_end;
|
|
|
|
if (to >= from)
|
|
count -= (to - from + 1);
|
|
|
|
tail += 2;
|
|
} else {
|
|
/* it's a literal */
|
|
if (*tail >= range_start && *tail <= range_end) count--;
|
|
tail++;
|
|
}
|
|
NS_ASSERTION (count >= 0, "invalid count");
|
|
}
|
|
return count;
|
|
}
|
|
|
|
|
|
int
|
|
nsMsgKeySet::FirstMissingRange(PRInt32 min, PRInt32 max,
|
|
PRInt32* first, PRInt32* last)
|
|
{
|
|
PRInt32 size;
|
|
PRInt32 *head;
|
|
PRInt32 *tail;
|
|
PRInt32 *end;
|
|
PRInt32 from = 0;
|
|
PRInt32 to = 0;
|
|
PRInt32 a;
|
|
PRInt32 b;
|
|
|
|
NS_ASSERTION(first && last, "invalid parameter");
|
|
if (!first || !last) return -1;
|
|
|
|
*first = *last = 0;
|
|
|
|
NS_ASSERTION(min <= max && min > 0, "invalid min or max param");
|
|
if (min > max || min <= 0) return -1;
|
|
|
|
size = m_length;
|
|
head = m_data;
|
|
tail = head;
|
|
end = head + size;
|
|
|
|
while (tail < end) {
|
|
a = to + 1;
|
|
if (*tail < 0) { /* We got a range. */
|
|
from = tail[1];
|
|
to = from + (-(tail[0]));
|
|
tail += 2;
|
|
} else {
|
|
from = to = tail[0];
|
|
tail++;
|
|
}
|
|
b = from - 1;
|
|
/* At this point, [a,b] is the range of unread articles just before
|
|
the current range of read articles [from,to]. See if this range
|
|
intersects the [min,max] range we were given. */
|
|
if (a > max) return 0; /* It's hopeless; there are none. */
|
|
if (a <= b && b >= min) {
|
|
/* Ah-hah! We found an intersection. */
|
|
*first = a > min ? a : min;
|
|
*last = b < max ? b : max;
|
|
return 0;
|
|
}
|
|
}
|
|
/* We found no holes in the newsrc that overlaps the range, nor did we hit
|
|
something read beyond the end of the range. So, the great infinite
|
|
range of unread articles at the end of any newsrc line intersects the
|
|
range we want, and we just need to return that. */
|
|
a = to + 1;
|
|
*first = a > min ? a : min;
|
|
*last = max;
|
|
return 0;
|
|
}
|
|
|
|
// I'm guessing we didn't include this because we didn't think we're going
|
|
// to need it. I'm not so sure. I'm putting it in for now.
|
|
int
|
|
nsMsgKeySet::LastMissingRange(PRInt32 min, PRInt32 max,
|
|
PRInt32* first, PRInt32* last)
|
|
{
|
|
PRInt32 size;
|
|
PRInt32 *head;
|
|
PRInt32 *tail;
|
|
PRInt32 *end;
|
|
PRInt32 from = 0;
|
|
PRInt32 to = 0;
|
|
PRInt32 a;
|
|
PRInt32 b;
|
|
|
|
NS_ASSERTION(first && last, "invalid null param");
|
|
if (!first || !last) return -1;
|
|
|
|
*first = *last = 0;
|
|
|
|
|
|
NS_ASSERTION(min <= max && min > 0, "invalid min or max");
|
|
if (min > max || min <= 0) return -1;
|
|
|
|
size = m_length;
|
|
head = m_data;
|
|
tail = head;
|
|
end = head + size;
|
|
|
|
while (tail < end) {
|
|
a = to + 1;
|
|
if (*tail < 0) { /* We got a range. */
|
|
from = tail[1];
|
|
to = from + (-(tail[0]));
|
|
tail += 2;
|
|
} else {
|
|
from = to = tail[0];
|
|
tail++;
|
|
}
|
|
b = from - 1;
|
|
/* At this point, [a,b] is the range of unread articles just before
|
|
the current range of read articles [from,to]. See if this range
|
|
intersects the [min,max] range we were given. */
|
|
if (a > max) return 0; /* We're done. If we found something, it's already
|
|
sitting in [*first,*last]. */
|
|
if (a <= b && b >= min) {
|
|
/* Ah-hah! We found an intersection. */
|
|
*first = a > min ? a : min;
|
|
*last = b < max ? b : max;
|
|
/* Continue on, looking for a later range. */
|
|
}
|
|
}
|
|
if (to < max) {
|
|
/* The great infinite range of unread articles at the end of any newsrc
|
|
line intersects the range we want, and we just need to return that. */
|
|
a = to + 1;
|
|
*first = a > min ? a : min;
|
|
*last = max;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef DEBUG /* A lot of test cases for the above */
|
|
|
|
#define countof(x) (sizeof(x) / sizeof(*(x)))
|
|
|
|
void
|
|
nsMsgKeySet::test_decoder (const char *string)
|
|
{
|
|
nsMsgKeySet set(string /* , NULL */);
|
|
char* tmp;
|
|
set.Output(&tmp);
|
|
printf ("\t\"%s\"\t--> \"%s\"\n", string, tmp);
|
|
nsMemory::Free(tmp);
|
|
}
|
|
|
|
|
|
#define START(STRING) \
|
|
string = STRING; \
|
|
if (!(set = nsMsgKeySet::Create(string))) abort ()
|
|
|
|
#define FROB(N,PUSHP) \
|
|
i = N; \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf ("%3lu: %-58s %c %3lu =\n", (unsigned long)set->m_length, s, \
|
|
(PUSHP ? '+' : '-'), (unsigned long)i); \
|
|
nsMemory::Free(s); \
|
|
if (PUSHP \
|
|
? set->Add(i) < 0 \
|
|
: set->Remove(i) < 0) \
|
|
abort (); \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf ("%3lu: %-58s optimized =\n", (unsigned long)set->m_length, s); \
|
|
nsMemory::Free(s); \
|
|
|
|
#define END() \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf ("%3lu: %s\n\n", (unsigned long)set->m_length, s); \
|
|
nsMemory::Free(s); \
|
|
delete set; \
|
|
|
|
|
|
|
|
void
|
|
nsMsgKeySet::test_adder (void)
|
|
{
|
|
char *string;
|
|
nsMsgKeySet *set;
|
|
char *s;
|
|
PRInt32 i;
|
|
|
|
START("0-70,72-99,105,107,110-111,117-200");
|
|
|
|
FROB(205, PR_TRUE);
|
|
FROB(206, PR_TRUE);
|
|
FROB(207, PR_TRUE);
|
|
FROB(208, PR_TRUE);
|
|
FROB(208, PR_TRUE);
|
|
FROB(109, PR_TRUE);
|
|
FROB(72, PR_TRUE);
|
|
|
|
FROB(205, PR_FALSE);
|
|
FROB(206, PR_FALSE);
|
|
FROB(207, PR_FALSE);
|
|
FROB(208, PR_FALSE);
|
|
FROB(208, PR_FALSE);
|
|
FROB(109, PR_FALSE);
|
|
FROB(72, PR_FALSE);
|
|
|
|
FROB(72, PR_TRUE);
|
|
FROB(109, PR_TRUE);
|
|
FROB(208, PR_TRUE);
|
|
FROB(208, PR_TRUE);
|
|
FROB(207, PR_TRUE);
|
|
FROB(206, PR_TRUE);
|
|
FROB(205, PR_TRUE);
|
|
|
|
FROB(205, PR_FALSE);
|
|
FROB(206, PR_FALSE);
|
|
FROB(207, PR_FALSE);
|
|
FROB(208, PR_FALSE);
|
|
FROB(208, PR_FALSE);
|
|
FROB(109, PR_FALSE);
|
|
FROB(72, PR_FALSE);
|
|
|
|
FROB(100, PR_TRUE);
|
|
FROB(101, PR_TRUE);
|
|
FROB(102, PR_TRUE);
|
|
FROB(103, PR_TRUE);
|
|
FROB(106, PR_TRUE);
|
|
FROB(104, PR_TRUE);
|
|
FROB(109, PR_TRUE);
|
|
FROB(108, PR_TRUE);
|
|
END();
|
|
|
|
START("1-6"); FROB(7, PR_FALSE); END();
|
|
START("1-6"); FROB(6, PR_FALSE); END();
|
|
START("1-6"); FROB(5, PR_FALSE); END();
|
|
START("1-6"); FROB(4, PR_FALSE); END();
|
|
START("1-6"); FROB(3, PR_FALSE); END();
|
|
START("1-6"); FROB(2, PR_FALSE); END();
|
|
START("1-6"); FROB(1, PR_FALSE); END();
|
|
START("1-6"); FROB(0, PR_FALSE); END();
|
|
|
|
START("1-3"); FROB(1, PR_FALSE); END();
|
|
START("1-3"); FROB(2, PR_FALSE); END();
|
|
START("1-3"); FROB(3, PR_FALSE); END();
|
|
|
|
START("1,3,5-7,9,10"); FROB(5, PR_FALSE); END();
|
|
START("1,3,5-7,9,10"); FROB(6, PR_FALSE); END();
|
|
START("1,3,5-7,9,10"); FROB(7, PR_FALSE); FROB(7, PR_TRUE); FROB(8, PR_TRUE);
|
|
FROB (4, PR_TRUE); FROB (2, PR_FALSE); FROB (2, PR_TRUE);
|
|
|
|
FROB (4, PR_FALSE); FROB (5, PR_FALSE); FROB (6, PR_FALSE); FROB (7, PR_FALSE);
|
|
FROB (8, PR_FALSE); FROB (9, PR_FALSE); FROB (10, PR_FALSE); FROB (3, PR_FALSE);
|
|
FROB (2, PR_FALSE); FROB (1, PR_FALSE); FROB (1, PR_FALSE); FROB (0, PR_FALSE);
|
|
END();
|
|
}
|
|
|
|
#undef START
|
|
#undef FROB
|
|
#undef END
|
|
|
|
|
|
|
|
#define START(STRING) \
|
|
string = STRING; \
|
|
if (!(set = nsMsgKeySet::Create(string))) abort ()
|
|
|
|
#define FROB(N,M) \
|
|
i = N; \
|
|
j = M; \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf ("%3lu: %-58s + %3lu-%3lu =\n", (unsigned long)set->m_length, s, (unsigned long)i, (unsigned long)j); \
|
|
nsMemory::Free(s); \
|
|
switch (set->AddRange(i, j)) { \
|
|
case 0: \
|
|
printf("(no-op)\n"); \
|
|
break; \
|
|
case 1: \
|
|
break; \
|
|
default: \
|
|
abort(); \
|
|
} \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf ("%3lu: %-58s\n", (unsigned long)set->m_length, s); \
|
|
nsMemory::Free(s); \
|
|
|
|
|
|
#define END() \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf ("%3lu: %s\n\n", (unsigned long)set->m_length, s); \
|
|
nsMemory::Free(s); \
|
|
delete set;
|
|
|
|
|
|
void
|
|
nsMsgKeySet::test_ranges(void)
|
|
{
|
|
char *string;
|
|
nsMsgKeySet *set;
|
|
char *s;
|
|
PRInt32 i;
|
|
PRInt32 j;
|
|
|
|
START("20-40,72-99,105,107,110-111,117-200");
|
|
|
|
FROB(205, 208);
|
|
FROB(50, 70);
|
|
FROB(0, 10);
|
|
FROB(112, 113);
|
|
FROB(101, 101);
|
|
FROB(5, 75);
|
|
FROB(103, 109);
|
|
FROB(2, 20);
|
|
FROB(1, 9999);
|
|
|
|
END();
|
|
|
|
|
|
#undef START
|
|
#undef FROB
|
|
#undef END
|
|
}
|
|
|
|
|
|
|
|
|
|
#define TEST(N) \
|
|
if (! with_cache) set->m_cached_value = -1; \
|
|
if (!(NS_SUCCEEDED(set->Output(&s)))) abort (); \
|
|
printf (" %3d = %s\n", N, \
|
|
(set->IsMember(N) ? "true" : "false")); \
|
|
delete [] s
|
|
|
|
void
|
|
nsMsgKeySet::test_member(PRBool with_cache)
|
|
{
|
|
nsMsgKeySet *set;
|
|
char *s;
|
|
|
|
s = "1-70,72-99,105,107,110-111,117-200";
|
|
printf ("\n\nTesting %s (with%s cache)\n", s, with_cache ? "" : "out");
|
|
if (!(set = Create(s))) {
|
|
abort ();
|
|
}
|
|
|
|
TEST(-1);
|
|
TEST(0);
|
|
TEST(1);
|
|
TEST(20);
|
|
|
|
delete set;
|
|
s = "0-70,72-99,105,107,110-111,117-200";
|
|
printf ("\n\nTesting %s (with%s cache)\n", s, with_cache ? "" : "out");
|
|
if (!(set = Create(s))) {
|
|
abort ();
|
|
}
|
|
|
|
TEST(-1);
|
|
TEST(0);
|
|
TEST(1);
|
|
TEST(20);
|
|
TEST(69);
|
|
TEST(70);
|
|
TEST(71);
|
|
TEST(72);
|
|
TEST(73);
|
|
TEST(74);
|
|
TEST(104);
|
|
TEST(105);
|
|
TEST(106);
|
|
TEST(107);
|
|
TEST(108);
|
|
TEST(109);
|
|
TEST(110);
|
|
TEST(111);
|
|
TEST(112);
|
|
TEST(116);
|
|
TEST(117);
|
|
TEST(118);
|
|
TEST(119);
|
|
TEST(200);
|
|
TEST(201);
|
|
TEST(65535);
|
|
|
|
delete set;
|
|
}
|
|
|
|
#undef TEST
|
|
|
|
|
|
// static void
|
|
// test_newsrc (char *file)
|
|
// {
|
|
// FILE *fp = fopen (file, "r");
|
|
// char buf [1024];
|
|
// if (! fp) abort ();
|
|
// while (fgets (buf, sizeof (buf), fp))
|
|
// {
|
|
// if (!strncmp (buf, "options ", 8))
|
|
// fwrite (buf, 1, strlen (buf), stdout);
|
|
// else
|
|
// {
|
|
// char *sep = buf;
|
|
// while (*sep != 0 && *sep != ':' && *sep != '!')
|
|
// sep++;
|
|
// if (*sep) sep++;
|
|
// while (nsCRT::IsAsciiSpace (*sep)) sep++;
|
|
// fwrite (buf, 1, sep - buf, stdout);
|
|
// if (*sep)
|
|
// {
|
|
// char *s;
|
|
// msg_NewsRCSet *set = msg_parse_newsrc_set (sep, &allocinfo);
|
|
// if (! set)
|
|
// abort ();
|
|
// if (! msg_OptimizeNewsRCSet (set))
|
|
// abort ();
|
|
// if (! ((s = msg_format_newsrc_set (set))))
|
|
// abort ();
|
|
// msg_free_newsrc_set (set, &allocinfo);
|
|
// fwrite (s, 1, strlen (s), stdout);
|
|
// free (s);
|
|
// fwrite ("\n", 1, 1, stdout);
|
|
// }
|
|
// }
|
|
// }
|
|
// fclose (fp);
|
|
// }
|
|
|
|
void
|
|
nsMsgKeySet::RunTests ()
|
|
{
|
|
|
|
test_decoder ("");
|
|
test_decoder (" ");
|
|
test_decoder ("0");
|
|
test_decoder ("1");
|
|
test_decoder ("123");
|
|
test_decoder (" 123 ");
|
|
test_decoder (" 123 4");
|
|
test_decoder (" 1,2, 3, 4");
|
|
test_decoder ("0-70,72-99,100,101");
|
|
test_decoder (" 0-70 , 72 - 99 ,100,101 ");
|
|
test_decoder ("0 - 268435455");
|
|
/* This one overflows - we can't help it.
|
|
test_decoder ("0 - 4294967295"); */
|
|
|
|
test_adder ();
|
|
|
|
test_ranges();
|
|
|
|
test_member (PR_FALSE);
|
|
test_member (PR_TRUE);
|
|
|
|
// test_newsrc ("/u/montulli/.newsrc");
|
|
/* test_newsrc ("/u/jwz/.newsrc");*/
|
|
}
|
|
|
|
#endif /* DEBUG */
|