mirror of
https://github.com/rn10950/RetroZilla.git
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534 lines
13 KiB
C++
534 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 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 Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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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 Communicator client 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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* Simon Fraser <sfraser@netscape.com>
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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 of the GNU General Public License Version 2 or later (the "GPL"),
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* or 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 MPL, 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 MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <StringCompare.h>
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#include "nsAEUtils.h"
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#include "nsAECompare.h"
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareTexts(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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Boolean result = false;
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short compareResult;
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Handle lhsHandle = 0, rhsHandle = 0;
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char *lhs;
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char *rhs;
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long lhsSize;
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long rhsSize;
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// FIXME: this can leak lhsHandle if second conversion fails.
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if (DescToTextHandle(desc1, &lhsHandle) != noErr || DescToTextHandle(desc2, &rhsHandle) != noErr)
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goto fail;
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lhsSize = GetHandleSize(lhsHandle);
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HLock(lhsHandle);
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lhs = *(lhsHandle);
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rhsSize = GetHandleSize(rhsHandle);
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HLock(rhsHandle);
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rhs = *(rhsHandle);
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compareResult = ::CompareText(lhs, rhs, lhsSize, rhsSize, nil);
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switch (oper)
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{
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case kAEEquals:
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result = (compareResult == 0);
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break;
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case kAELessThan:
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result = (compareResult < 0);
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break;
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case kAELessThanEquals:
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result = (compareResult <= 0);
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break;
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case kAEGreaterThan:
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result = (compareResult > 0);
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break;
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case kAEGreaterThanEquals:
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result = (compareResult >= 0);
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break;
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case kAEBeginsWith:
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if (rhsSize > lhsSize)
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{
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result = false;
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}
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else
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{
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// compare only the number of characters in rhs
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// begin comparing at the beginning of lhs
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compareResult = CompareText(lhs, rhs, rhsSize, rhsSize, nil);
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result = (compareResult == 0);
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}
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break;
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case kAEEndsWith:
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if (rhsSize > lhsSize)
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{
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result = false;
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}
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else
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{
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// compare only the number of characters in rhs
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// begin comparing rhsSize characters from the end of lhs
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// start
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lhs += (lhsSize - rhsSize);
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compareResult = CompareText(lhs, rhs, rhsSize, rhsSize, nil);
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result = (compareResult == 0);
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}
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break;
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case kAEContains:
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// Here I use an inefficient search strategy, but we're dealing with small amounts
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// of text and by using CompareText(), we're doing the same style of comparison
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// as in the other cases above.
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result = false;
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while (lhsSize >= rhsSize)
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{
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compareResult = CompareText(lhs, rhs, rhsSize, rhsSize, nil);
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if (compareResult == 0)
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{
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result = true;
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break;
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}
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lhs++;
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lhsSize--;
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}
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break;
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default:
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ThrowOSErr(errAEBadTestKey);
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}
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fail:
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if (lhsHandle) DisposeHandle(lhsHandle);
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if (rhsHandle) DisposeHandle(rhsHandle);
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareEnumeration(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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long lhs;
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long rhs;
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StAEDesc charDesc;
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// Make each number is a long integer (in case it's a short integer or other integer type)
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// before extracting the data */
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err = AECoerceDesc(desc1, typeChar, &charDesc);
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ThrowIfOSErr(err);
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lhs = **(long **)(charDesc.dataHandle);
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AEDisposeDesc(&charDesc);
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err = AECoerceDesc(desc2, typeChar, &charDesc);
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ThrowIfOSErr(err);
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rhs = **(long **)charDesc.dataHandle;
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AEDisposeDesc(&charDesc);
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switch (oper)
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{
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case kAEEquals:
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result = (lhs == rhs); // equality is the only test that makes sense for enumerators
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break;
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default:
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ThrowOSErr(errAEBadTestKey);
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}
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareInteger(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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long lhs;
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long rhs;
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StAEDesc longDesc;
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// Make each number is a long integer (in case it's a short integer or other integer type)
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// before extracting the data */
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err = AECoerceDesc(desc1, typeLongInteger, &longDesc);
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ThrowIfOSErr(err);
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lhs = **(long **)(longDesc.dataHandle);
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AEDisposeDesc(&longDesc);
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err = AECoerceDesc(desc2, typeLongInteger, &longDesc);
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ThrowIfOSErr(err);
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rhs = **(long **)longDesc.dataHandle;
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AEDisposeDesc(&longDesc);
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switch (oper)
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{
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case kAEEquals:
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result = (lhs == rhs);
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break;
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case kAELessThan:
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result = (lhs < rhs);
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break;
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case kAELessThanEquals:
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result = (lhs <= rhs);
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break;
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case kAEGreaterThan:
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result = (lhs > rhs);
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break;
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case kAEGreaterThanEquals:
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result = (lhs >= rhs);
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break;
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default:
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ThrowOSErr(errAEBadTestKey);
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}
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareFixed(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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Fixed lhs;
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Fixed rhs;
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err = DescToFixed(desc1, &lhs);
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ThrowIfOSErr(err);
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err = DescToFixed(desc2, &rhs);
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ThrowIfOSErr(err);
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switch (oper)
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{
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case kAEEquals:
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result = (lhs == rhs);
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break;
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case kAELessThan:
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result = (lhs < rhs);
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break;
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case kAELessThanEquals:
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result = (lhs <= rhs);
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break;
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case kAEGreaterThan:
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result = (lhs > rhs);
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break;
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case kAEGreaterThanEquals:
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result = (lhs >= rhs);
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break;
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default:
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ThrowOSErr(errAEBadTestKey);
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}
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareFloat(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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float lhs;
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float rhs;
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err = DescToFloat(desc1, &lhs);
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ThrowIfOSErr(err);
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err = DescToFloat(desc2, &rhs);
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ThrowIfOSErr(err);
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switch (oper)
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{
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case kAEEquals:
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result = (lhs == rhs);
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break;
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case kAELessThan:
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result = (lhs < rhs);
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break;
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case kAELessThanEquals:
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result = (lhs <= rhs);
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break;
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case kAEGreaterThan:
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result = (lhs > rhs);
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break;
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case kAEGreaterThanEquals:
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result = (lhs >= rhs);
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break;
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default:
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ThrowOSErr(errAEBadTestKey);
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}
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return result;
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}
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// ----------------------------------------------------------------------------------------
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// Apple events defines a boolean as a 1-byte value containing 1 for TRUE and 0 for FALSE
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Boolean AEComparisons::CompareBoolean(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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Boolean bool1 = ((**(char **)desc1->dataHandle) != 0);
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Boolean bool2 = ((**(char **)desc2->dataHandle) != 0);
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if (oper == kAEEquals)
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result = (bool1 == bool2);
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else
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ThrowOSErr(errAEBadTestKey); // No other tests make sense
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareRGBColor(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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RGBColor lhs;
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RGBColor rhs;
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err = DescToRGBColor(desc1, &lhs);
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ThrowIfOSErr(err);
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err = DescToRGBColor(desc2, &rhs);
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ThrowIfOSErr(err);
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if (oper == kAEEquals)
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result = EqualRGB(lhs, rhs);
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else
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ThrowOSErr(errAEBadTestKey); // No other tests make sense
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::ComparePoint(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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Point lhs;
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Point rhs;
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err = DescToPoint(desc1, &lhs);
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ThrowIfOSErr(err);
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err = DescToPoint(desc2, &rhs);
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ThrowIfOSErr(err);
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switch (oper)
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{
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case kAEEquals:
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result = (lhs.h = rhs.h && lhs.v == rhs.v);
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break;
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case kAELessThan:
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result = (lhs.h < rhs.h && lhs.v < rhs.v);
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break;
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case kAELessThanEquals:
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result = (lhs.h <= rhs.h && lhs.v <= rhs.v);
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break;
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case kAEGreaterThan:
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result = (lhs.h > rhs.h && lhs.v > rhs.v);
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break;
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case kAEGreaterThanEquals:
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result = (lhs.h >= rhs.h && lhs.v >= rhs.v);
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break;
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default:
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ThrowOSErr(errAEBadTestKey); // No other tests make sense
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}
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return result;
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}
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// ----------------------------------------------------------------------------------------
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Boolean AEComparisons::CompareRect(DescType oper, const AEDesc *desc1, const AEDesc *desc2)
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{
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OSErr err = noErr;
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Boolean result = false;
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Rect lhs;
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Rect rhs;
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err = DescToRect(desc1, &lhs);
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ThrowIfOSErr(err);
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err = DescToRect(desc2, &rhs);
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ThrowIfOSErr(err);
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switch (oper)
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{
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// compare size AND location
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case kAEEquals:
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result = ((lhs.top == rhs.top) && (lhs.left == rhs.left) && (lhs.bottom == rhs.bottom) && (lhs.right == rhs.right));
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break;
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// compare size only on the rest of the tests
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case kAELessThan:
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result = (((lhs.bottom - lhs.top) < (rhs.bottom - rhs.top)) && ((lhs.right - lhs.left) < (lhs.right - rhs.left)));
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break;
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case kAELessThanEquals:
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result = (((lhs.bottom - lhs.top) < (rhs.bottom - rhs.top)) && ((lhs.right - lhs.left) < (lhs.right - rhs.left)));
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break;
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case kAEGreaterThan:
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result = (((lhs.bottom - lhs.top) < (rhs.bottom - rhs.top)) && ((lhs.right - lhs.left) < (lhs.right - rhs.left)));
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break;
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case kAEGreaterThanEquals:
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result = (((lhs.bottom - lhs.top) < (rhs.bottom - rhs.top)) && ((lhs.right - lhs.left) < (lhs.right - rhs.left)));
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break;
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case kAEContains:
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// Note: two identical Rects contain each other, according to this test:
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result = ((lhs.top <= rhs.top) && (lhs.left <= rhs.left) && (lhs.bottom >= rhs.bottom) && (lhs.right >= rhs.right));
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break;
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default:
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ThrowOSErr(errAEBadTestKey); // No other tests make sense
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}
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return result;
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}
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#pragma mark -
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/*----------------------------------------------------------------------------
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TryPrimitiveComparison
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----------------------------------------------------------------------------*/
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Boolean AEComparisons::TryPrimitiveComparison(DescType comparisonOperator, const AEDesc *desc1, const AEDesc *desc2)
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{
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Boolean result = false;
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// This has to handle all the data types used in the application's
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// object model implementation.
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switch (desc1->descriptorType)
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{
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case typeChar:
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result = CompareTexts(comparisonOperator, desc1, desc2);
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break;
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case typeShortInteger: // also covers typeSMInt 'shor'
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case typeLongInteger: // also covers typeInteger 'long'
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case typeMagnitude: // 'magn'
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result = CompareInteger(comparisonOperator, desc1, desc2);
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break;
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case typeEnumerated:
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result = CompareEnumeration(comparisonOperator, desc1, desc2);
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break;
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case typeFixed:
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result = CompareFixed(comparisonOperator, desc1, desc2);
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break;
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case typeFloat:
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result = CompareFloat(comparisonOperator, desc1, desc2);
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break;
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case typeBoolean:
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result = CompareBoolean(comparisonOperator, desc1, desc2);
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break;
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case typeRGBColor:
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result = CompareRGBColor(comparisonOperator, desc1, desc2);
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break;
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case typeQDRectangle:
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result = CompareRect(comparisonOperator, desc1, desc2);
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break;
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case typeQDPoint:
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result = ComparePoint(comparisonOperator, desc1, desc2);
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break;
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default:
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ThrowOSErr(errAEWrongDataType);
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}
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return result;
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}
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