зеркало из https://github.com/mozilla/pjs.git
872 строки
29 KiB
C++
872 строки
29 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: 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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* Pierre Phaneuf <pp@ludusdesign.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 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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/* bufferRoutines.h --- rickg's original string manipulation underpinnings;
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this code will be made obsolete by the new shared-buffer string (see bug #53065)
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*/
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#ifndef _BUFFERROUTINES_H
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#define _BUFFERROUTINES_H
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#ifndef nsStringDefines_h___
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#include "nsStringDefines.h"
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#endif
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#ifndef nsCharTraits_h___
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#include "nsCharTraits.h"
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#endif
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#include "nspr.h"
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#include "plstr.h"
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#include <ctype.h>
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/******************************************************************************************
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MODULE NOTES:
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This file contains the workhorse copy and shift functions used in nsStrStruct.
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Ultimately, I plan to make the function pointers in this system available for
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use by external modules. They'll be able to install their own "handlers".
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Not so, today though.
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*******************************************************************************************/
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#define KSHIFTLEFT (0)
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#define KSHIFTRIGHT (1)
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// uncomment the following line to caught nsString char* casting problem
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//#define DEBUG_ILLEGAL_CAST_UP
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//#define DEBUG_ILLEGAL_CAST_DOWN
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#if defined(DEBUG_ILLEGAL_CAST_UP) || defined(DEBUG_ILLEGAL_CAST_DOWN)
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static PRBool track_illegal = PR_TRUE;
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static PRBool track_latin1 = PR_TRUE;
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#ifdef XP_UNIX
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#include "nsTraceRefcnt.h"
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class CTraceFile {
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public:
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CTraceFile() {
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mFile = fopen("nsStringTrace.txt" , "a+");
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}
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~CTraceFile() {
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fflush(mFile);
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fclose(mFile);
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}
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void ReportCastUp(const char* data, const char* msg)
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{
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if(mFile) {
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fprintf(mFile, "ERRORTEXT= %s\n", msg);
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fprintf(mFile, "BEGINDATA\n");
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const char* s=data;
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while(*s) {
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if(*s & 0x80) {
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fprintf(mFile, "[%2X]", (char)*s);
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} else {
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fprintf(mFile, "%c", *s);
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}
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s++;
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}
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fprintf(mFile, "\n");
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fprintf(mFile, "ENDDATA\n");
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fprintf(mFile, "BEGINSTACK\n");
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nsTraceRefcnt::WalkTheStack(mFile);
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fprintf(mFile, "\n");
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fprintf(mFile, "ENDSTACK\n");
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fflush(mFile);
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}
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}
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void ReportCastDown(const PRUnichar* data, const char* msg)
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{
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if(mFile) {
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fprintf(mFile, "ERRORTEXT=%s\n", msg);
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fprintf(mFile, "BEGINDATA\n");
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const PRUnichar* s=data;
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while(*s) {
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if(*s & 0xFF80) {
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fprintf(mFile, "\\u%X", *s);
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} else {
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fprintf(mFile, "%c", *s);
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}
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s++;
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}
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fprintf(mFile, "\n");
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fprintf(mFile, "ENDDATA\n");
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fprintf(mFile, "BEGINSTACK\n");
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nsTraceRefcnt::WalkTheStack(mFile);
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fprintf(mFile, "\n");
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fprintf(mFile, "ENDSTACK\n");
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fflush(mFile);
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}
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}
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private:
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FILE* mFile;
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};
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static CTraceFile gTrace;
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#define TRACE_ILLEGAL_CAST_UP(c, s, m) if(!(c)) gTrace.ReportCastUp(s,m);
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#define TRACE_ILLEGAL_CAST_DOWN(c, s, m) if(!(c)) gTrace.ReportCastDown(s,m);
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#else // XP_UNIX
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#define TRACE_ILLEGAL_CAST_UP(c, s, m) NS_ASSERTION((c), (m))
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#define TRACE_ILLEGAL_CAST_DOWN(c, s, m) NS_ASSERTION((c), (m))
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#endif //XP_UNIX
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#endif
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inline PRUnichar GetCharAt(const char* aString,PRUint32 anIndex) {
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return (PRUnichar)aString[anIndex];
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}
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//----------------------------------------------------------------------------------------
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//
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// This set of methods is used to shift the contents of a char buffer.
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// The functions are differentiated by shift direction and the underlying charsize.
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//
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/**
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* This method shifts single byte characters left by a given amount from an given offset.
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* @update gess 01/04/99
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* @param aDest is a ptr to a cstring where left-shift is to be performed
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* @param aLength is the known length of aDest
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* @param anOffset is the index into aDest where shifting shall begin
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* @param aCount is the number of chars to be "cut"
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*/
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void ShiftCharsLeft(char* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount);
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void ShiftCharsLeft(char* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount) {
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char* dst = aDest+anOffset;
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char* src = aDest+anOffset+aCount;
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memmove(dst,src,aLength-(aCount+anOffset));
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}
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/**
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* This method shifts single byte characters right by a given amount from an given offset.
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* @update gess 01/04/99
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* @param aDest is a ptr to a cstring where the shift is to be performed
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* @param aLength is the known length of aDest
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* @param anOffset is the index into aDest where shifting shall begin
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* @param aCount is the number of chars to be "inserted"
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*/
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void ShiftCharsRight(char* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount);
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void ShiftCharsRight(char* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount) {
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char* src = aDest+anOffset;
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char* dst = aDest+anOffset+aCount;
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memmove(dst,src,aLength-anOffset);
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}
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/**
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* This method shifts unicode characters by a given amount from an given offset.
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* @update gess 01/04/99
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* @param aDest is a ptr to a cstring where the shift is to be performed
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* @param aLength is the known length of aDest
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* @param anOffset is the index into aDest where shifting shall begin
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* @param aCount is the number of chars to be "cut"
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*/
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void ShiftDoubleCharsLeft(PRUnichar* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount);
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void ShiftDoubleCharsLeft(PRUnichar* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount) {
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PRUnichar* root= aDest;
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PRUnichar* dst = root+anOffset;
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PRUnichar* src = root+anOffset+aCount;
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memmove(dst,src,(aLength-(aCount+anOffset))*sizeof(PRUnichar));
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}
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/**
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* This method shifts unicode characters by a given amount from an given offset.
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* @update gess 01/04/99
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* @param aDest is a ptr to a cstring where the shift is to be performed
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* @param aLength is the known length of aDest
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* @param anOffset is the index into aDest where shifting shall begin
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* @param aCount is the number of chars to be "inserted"
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*/
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void ShiftDoubleCharsRight(PRUnichar* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount);
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void ShiftDoubleCharsRight(PRUnichar* aDest,PRUint32 aLength,PRUint32 anOffset,PRUint32 aCount) {
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PRUnichar* root= aDest;
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PRUnichar* src = root+anOffset;
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PRUnichar* dst = root+anOffset+aCount;
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memmove(dst,src,sizeof(PRUnichar)*(aLength-anOffset));
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}
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//----------------------------------------------------------------------------------------
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//
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// This set of methods is used to copy one buffer onto another.
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// The functions are differentiated by the size of source and dest character sizes.
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// WARNING: Your destination buffer MUST be big enough to hold all the source bytes.
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// We don't validate these ranges here (this should be done in higher level routines).
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//
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/**
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* Going 1 to 1 is easy, since we assume ascii. No conversions are necessary.
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* @update gess 01/04/99
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* @param aDest is the destination buffer
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* @param aDestOffset is the pos to start copy to in the dest buffer
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* @param aSource is the source buffer
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* @param anOffset is the offset to start copying from in the source buffer
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* @param aCount is the (max) number of chars to copy
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*/
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void CopyChars1To1(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount);
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void CopyChars1To1(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount) {
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char* dst = aDest+anDestOffset;
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char* src = (char*)aSource+anOffset;
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memcpy(dst,src,aCount);
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}
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/**
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* Going 1 to 2 requires a conversion from ascii to unicode. This can be expensive.
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* @param aDest is the destination buffer
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* @param aDestOffset is the pos to start copy to in the dest buffer
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* @param aSource is the source buffer
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* @param anOffset is the offset to start copying from in the source buffer
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* @param aCount is the (max) number of chars to copy
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*/
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void CopyChars1To2(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount);
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void CopyChars1To2(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount) {
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PRUnichar* theDest=(PRUnichar*)aDest;
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PRUnichar* to = theDest+anDestOffset;
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const unsigned char* first= (const unsigned char*)aSource+anOffset;
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const unsigned char* last = first+aCount;
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#ifdef DEBUG_ILLEGAL_CAST_UP
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PRBool illegal= PR_FALSE;
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#endif
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//now loop over characters, shifting them left...
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while(first < last) {
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*to=(PRUnichar)(*first);
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#ifdef DEBUG_ILLEGAL_CAST_UP
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if(track_illegal && track_latin1 && ((*to)& 0x80))
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illegal= PR_TRUE;
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#endif
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to++;
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first++;
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}
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#ifdef DEBUG_ILLEGAL_CAST_UP
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TRACE_ILLEGAL_CAST_UP((!illegal), aSource, "illegal cast up in CopyChars1To2");
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#endif
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}
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/**
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* Going 2 to 1 requires a conversion from unicode down to ascii. This can be lossy.
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* @update gess 01/04/99
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* @param aDest is the destination buffer
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* @param aDestOffset is the pos to start copy to in the dest buffer
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* @param aSource is the source buffer
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* @param anOffset is the offset to start copying from in the source buffer
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* @param aCount is the (max) number of chars to copy
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*/
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void CopyChars2To1(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount);
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void CopyChars2To1(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount) {
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char* to = aDest+anDestOffset;
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PRUnichar* theSource=(PRUnichar*)aSource;
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const PRUnichar* first= theSource+anOffset;
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const PRUnichar* last = first+aCount;
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#ifdef DEBUG_ILLEGAL_CAST_DOWN
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PRBool illegal= PR_FALSE;
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#endif
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//now loop over characters, shifting them left...
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while(first < last) {
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if(*first < 256)
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*to=(char)*first;
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else {
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*to='.';
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NS_ASSERTION( (*first < 256), "data in U+0100-U+FFFF will be lost");
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}
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#ifdef DEBUG_ILLEGAL_CAST_DOWN
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if(track_illegal) {
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if(track_latin1) {
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if(*first & 0xFF80)
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illegal = PR_TRUE;
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} else {
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if(*first & 0xFF00)
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illegal = PR_TRUE;
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} // track_latin1
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} // track_illegal
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#endif
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to++;
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first++;
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}
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#ifdef DEBUG_ILLEGAL_CAST_DOWN
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TRACE_ILLEGAL_CAST_DOWN((!illegal), theSource, "illegal cast down in CopyChars2To1");
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#endif
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}
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/**
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* Going 2 to 2 is fast and efficient.
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* @update gess 01/04/99
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* @param aDest is the destination buffer
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* @param aDestOffset is the pos to start copy to in the dest buffer
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* @param aSource is the source buffer
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* @param anOffset is the offset to start copying from in the source buffer
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* @param aCount is the (max) number of chars to copy
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*/
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void CopyChars2To2(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount);
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void CopyChars2To2(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount) {
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PRUnichar* theDest=(PRUnichar*)aDest;
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PRUnichar* to = theDest+anDestOffset;
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PRUnichar* theSource=(PRUnichar*)aSource;
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PRUnichar* from= theSource+anOffset;
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if(aCount == 1)
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*to = *from;
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else
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memcpy((void*)to,(void*)from,aCount*sizeof(PRUnichar));
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}
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//--------------------------------------------------------------------------------------
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typedef void (*CopyChars)(char* aDest,PRInt32 anDestOffset,const char* aSource,PRUint32 anOffset,PRUint32 aCount);
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CopyChars gCopyChars[2][2]={
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{&CopyChars1To1,&CopyChars1To2},
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{&CopyChars2To1,&CopyChars2To2}
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};
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//----------------------------------------------------------------------------------------
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//
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// This set of methods is used to search a buffer looking for a char.
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//
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/**
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* This methods cans the given buffer for the given char
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*
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* @update gess 02/17/00
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* @param aDest is the buffer to be searched
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* @param aDestLength is the size (in char-units, not bytes) of the buffer
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* @param anOffset is the start pos to begin searching
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* @param aChar is the target character we're looking for
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* @param aIgnorecase tells us whether to use a case sensitive search
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* @param aCount tells us how many characters to iterate through (which may be different than aLength); -1 means use full length.
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* @return index of pos if found, else -1 (kNotFound)
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*/
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inline PRInt32 FindChar1(const char* aDest,PRUint32 aDestLength,PRInt32 anOffset,const PRUnichar aChar,PRBool aIgnoreCase,PRInt32 aCount) {
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if(anOffset < 0)
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anOffset=0;
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if(aCount < 0)
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aCount = (PRInt32)aDestLength;
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if((aChar < 256) && (0 < aDestLength) && ((PRUint32)anOffset < aDestLength)) {
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//We'll only search if the given aChar is within the normal ascii a range,
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//(Since this string is definitely within the ascii range).
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if(0<aCount) {
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const char* left= aDest+anOffset;
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const char* last= left+aCount;
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const char* max = aDest+aDestLength;
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const char* end = (last<max) ? last : max;
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if(aIgnoreCase) {
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// safe because aChar < 256
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char theChar=toupper(char(aChar));
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while(left<end){
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if(toupper(*left)==theChar)
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return left-aDest;
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++left;
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}
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}
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else {
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PRInt32 theMax = end-left;
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if(0<theMax) {
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unsigned char theChar = (unsigned char) aChar;
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const char* result=(const char*)memchr(left, (int)theChar, theMax);
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if(result)
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return result-aDest;
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}
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}
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}
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}
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return kNotFound;
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}
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/**
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* This methods cans the given buffer for the given char
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*
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* @update gess 3/25/98
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* @param aDest is the buffer to be searched
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* @param aDestLength is the size (in char-units, not bytes) of the buffer
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* @param anOffset is the start pos to begin searching
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* @param aChar is the target character we're looking for
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* @param aIgnorecase tells us whether to use a case sensitive search
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* @param aCount tells us how many characters to iterate through (which may be different than aLength); -1 means use full length.
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* @return index of pos if found, else -1 (kNotFound)
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*/
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inline PRInt32 FindChar2(const PRUnichar* aDest,PRUint32 aDestLength,PRInt32 anOffset,const PRUnichar aChar,PRInt32 aCount) {
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if(anOffset < 0)
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anOffset=0;
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if(aCount < 0)
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aCount = (PRInt32)aDestLength;
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if((0<aDestLength) && ((PRUint32)anOffset < aDestLength)) {
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if(0<aCount) {
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const PRUnichar* root = aDest;
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const PRUnichar* left = root+anOffset;
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const PRUnichar* last = left+aCount;
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const PRUnichar* max = root+aDestLength;
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const PRUnichar* end = (last<max) ? last : max;
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while(left<end){
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if(*left==aChar)
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return (left-root);
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++left;
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}
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}
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}
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|
|
return kNotFound;
|
|
}
|
|
|
|
|
|
/**
|
|
* This methods cans the given buffer (in reverse) for the given char
|
|
*
|
|
* @update gess 02/17/00
|
|
* @param aDest is the buffer to be searched
|
|
* @param aDestLength is the size (in char-units, not bytes) of the buffer
|
|
* @param anOffset is the start pos to begin searching
|
|
* @param aChar is the target character we're looking for
|
|
* @param aIgnorecase tells us whether to use a case sensitive search
|
|
* @param aCount tells us how many characters to iterate through (which may be different than aLength); -1 means use full length.
|
|
* @return index of pos if found, else -1 (kNotFound)
|
|
*/
|
|
|
|
inline PRInt32 RFindChar1(const char* aDest,PRUint32 aDestLength,PRInt32 anOffset,const PRUnichar aChar,PRInt32 aCount) {
|
|
|
|
if(anOffset < 0)
|
|
anOffset=(PRInt32)aDestLength-1;
|
|
|
|
if(aCount < 0)
|
|
aCount = PRInt32(aDestLength);
|
|
|
|
if((aChar<256) && (0 < aDestLength) && ((PRUint32)anOffset < aDestLength)) {
|
|
|
|
//We'll only search if the given aChar is within the normal ascii a range,
|
|
//(Since this string is definitely within the ascii range).
|
|
|
|
if(0 < aCount) {
|
|
|
|
const char* rightmost = aDest + anOffset;
|
|
const char* min = rightmost - aCount + 1;
|
|
const char* leftmost = (min<aDest) ? aDest: min;
|
|
|
|
char theChar=(char)aChar;
|
|
while(leftmost <= rightmost){
|
|
|
|
if((*rightmost) == theChar)
|
|
return rightmost - aDest;
|
|
|
|
--rightmost;
|
|
}
|
|
}
|
|
}
|
|
|
|
return kNotFound;
|
|
}
|
|
|
|
|
|
/**
|
|
* This methods cans the given buffer for the given char
|
|
*
|
|
* @update gess 3/25/98
|
|
* @param aDest is the buffer to be searched
|
|
* @param aDestLength is the size (in char-units, not bytes) of the buffer
|
|
* @param anOffset is the start pos to begin searching
|
|
* @param aChar is the target character we're looking for
|
|
* @param aIgnorecase tells us whether to use a case sensitive search
|
|
* @param aCount tells us how many characters to iterate through (which may be different than aLength); -1 means use full length.
|
|
* @return index of pos if found, else -1 (kNotFound)
|
|
*/
|
|
inline PRInt32 RFindChar2(const PRUnichar* aDest,PRUint32 aDestLength,PRInt32 anOffset,const PRUnichar aChar,PRInt32 aCount) {
|
|
|
|
if(anOffset < 0)
|
|
anOffset=(PRInt32)aDestLength-1;
|
|
|
|
if(aCount < 0)
|
|
aCount = PRInt32(aDestLength);
|
|
|
|
if((0 < aDestLength) && ((PRUint32)anOffset < aDestLength)) {
|
|
|
|
if(0 < aCount) {
|
|
|
|
const PRUnichar* root = aDest;
|
|
const PRUnichar* rightmost = root + anOffset;
|
|
const PRUnichar* min = rightmost - aCount + 1;
|
|
const PRUnichar* leftmost = (min<root) ? root: min;
|
|
|
|
while(leftmost <= rightmost){
|
|
|
|
if((*rightmost) == aChar)
|
|
return rightmost - root;
|
|
|
|
--rightmost;
|
|
}
|
|
}
|
|
}
|
|
|
|
return kNotFound;
|
|
}
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
//
|
|
// This set of methods is used to compare one buffer onto another.
|
|
// The functions are differentiated by the size of source and dest character sizes.
|
|
// WARNING: Your destination buffer MUST be big enough to hold all the source bytes.
|
|
// We don't validate these ranges here (this should be done in higher level routines).
|
|
//
|
|
|
|
|
|
/**
|
|
* This method compares the data in one buffer with another
|
|
* @update gess 01/04/99
|
|
* @param aStr1 is the first buffer to be compared
|
|
* @param aStr2 is the 2nd buffer to be compared
|
|
* @param aCount is the number of chars to compare
|
|
* @param aIgnorecase tells us whether to use a case-sensitive comparison
|
|
* @return -1,0,1 depending on <,==,>
|
|
*/
|
|
static inline PRInt32 Compare1To1(const char* aStr1,const char* aStr2,PRUint32 aCount,PRBool aIgnoreCase);
|
|
PRInt32 Compare1To1(const char* aStr1,const char* aStr2,PRUint32 aCount,PRBool aIgnoreCase){
|
|
PRInt32 result=0;
|
|
if(aIgnoreCase)
|
|
result=PRInt32(PL_strncasecmp(aStr1, aStr2, aCount));
|
|
else
|
|
result=nsCharTraits<char>::compare(aStr1,aStr2,aCount);
|
|
|
|
// alien comparisons may return out-of-bound answers
|
|
// instead of the -1, 0, 1 expected by most clients
|
|
if ( result < -1 )
|
|
result = -1;
|
|
else if ( result > 1 )
|
|
result = 1;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* This method compares the data in one buffer with another
|
|
* @update gess 01/04/99
|
|
* @param aStr1 is the first buffer to be compared
|
|
* @param aStr2 is the 2nd buffer to be compared
|
|
* @param aCount is the number of chars to compare
|
|
* @param aIgnorecase tells us whether to use a case-sensitive comparison
|
|
* @return -1,0,1 depending on <,==,>
|
|
*/
|
|
PRInt32 Compare2To2(const PRUnichar* aStr1,const PRUnichar* aStr2,PRUint32 aCount);
|
|
PRInt32 Compare2To2(const PRUnichar* aStr1,const PRUnichar* aStr2,PRUint32 aCount){
|
|
PRInt32 result;
|
|
|
|
if ( aStr1 && aStr2 )
|
|
result = nsCharTraits<PRUnichar>::compare(aStr1, aStr2, aCount);
|
|
|
|
// The following cases are rare and survivable caller errors.
|
|
// Two null pointers are equal, but any string, even 0 length
|
|
// is greater than a null pointer. It might not really matter,
|
|
// but we pick something reasonable anyway.
|
|
else if ( !aStr1 && !aStr2 )
|
|
result = 0;
|
|
else if ( aStr1 )
|
|
result = 1;
|
|
else
|
|
result = -1;
|
|
|
|
// alien comparisons may give answers outside the -1, 0, 1 expected by callers
|
|
if ( result < -1 )
|
|
result = -1;
|
|
else if ( result > 1 )
|
|
result = 1;
|
|
return result;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method compares the data in one buffer with another
|
|
* @update gess 01/04/99
|
|
* @param aStr1 is the first buffer to be compared
|
|
* @param aStr2 is the 2nd buffer to be compared
|
|
* @param aCount is the number of chars to compare
|
|
* @param aIgnorecase tells us whether to use a case-sensitive comparison
|
|
* @return -1,0,1 depending on <,==,>
|
|
*/
|
|
static PRInt32 Compare2To1(const PRUnichar* aStr1,const char* aStr2,PRUint32 aCount,PRBool aIgnoreCase);
|
|
PRInt32 Compare2To1(const PRUnichar* aStr1,const char* aStr2,PRUint32 aCount,PRBool aIgnoreCase){
|
|
const PRUnichar* s1 = aStr1;
|
|
const char *s2 = aStr2;
|
|
|
|
if (aStr1 && aStr2) {
|
|
if (aCount != 0) {
|
|
do {
|
|
|
|
PRUnichar c1 = *s1++;
|
|
PRUnichar c2 = PRUnichar((unsigned char)*s2++);
|
|
|
|
if (c1 != c2) {
|
|
#ifdef NS_DEBUG
|
|
// we won't warn on c1>=128 (the 2-byte value) because often
|
|
// it is just fine to compare an constant, ascii value (i.e. "body")
|
|
// against some non-ascii value (i.e. a unicode string that
|
|
// was downloaded from a web page)
|
|
if (aIgnoreCase && c2>=128)
|
|
NS_WARNING("got a non-ASCII string, but we can't do an accurate case conversion!");
|
|
#endif
|
|
|
|
// can't do case conversion on characters out of our range
|
|
if (aIgnoreCase && c1<128 && c2<128) {
|
|
|
|
c1 = tolower(char(c1));
|
|
c2 = tolower(char(c2));
|
|
|
|
if (c1 == c2) continue;
|
|
}
|
|
|
|
if (c1 < c2) return -1;
|
|
return 1;
|
|
}
|
|
} while (--aCount);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method compares the data in one buffer with another
|
|
* @update gess 01/04/99
|
|
* @param aStr1 is the first buffer to be compared
|
|
* @param aStr2 is the 2nd buffer to be compared
|
|
* @param aCount is the number of chars to compare
|
|
* @param aIgnorecase tells us whether to use a case-sensitive comparison
|
|
* @return -1,0,1 depending on <,==,>
|
|
*/
|
|
static inline PRInt32 Compare1To2(const char* aStr1,const PRUnichar* aStr2,PRUint32 aCount,PRBool aIgnoreCase);
|
|
PRInt32 Compare1To2(const char* aStr1,const PRUnichar* aStr2,PRUint32 aCount,PRBool aIgnoreCase){
|
|
return Compare2To1(aStr2, aStr1, aCount, aIgnoreCase) * -1;
|
|
}
|
|
|
|
|
|
//----------------------------------------------------------------------------------------
|
|
//
|
|
// This set of methods is used compress char sequences in a buffer...
|
|
//
|
|
|
|
|
|
/**
|
|
* This method compresses duplicate runs of a given char from the given buffer
|
|
*
|
|
* @update rickg 03.23.2000
|
|
* @param aString is the buffer to be manipulated
|
|
* @param aLength is the length of the buffer
|
|
* @param aSet tells us which chars to compress from given buffer
|
|
* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
|
|
* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
|
|
* @return the new length of the given buffer
|
|
*/
|
|
PRInt32 CompressChars1(char* aString,PRUint32 aLength,const char* aSet);
|
|
PRInt32 CompressChars1(char* aString,PRUint32 aLength,const char* aSet){
|
|
|
|
char* from = aString;
|
|
char* end = aString + aLength;
|
|
char* to = from;
|
|
|
|
//this code converts /n, /t, /r into normal space ' ';
|
|
//it also compresses runs of whitespace down to a single char...
|
|
if(aSet && aString && (0 < aLength)){
|
|
PRUint32 aSetLen=strlen(aSet);
|
|
|
|
while (from < end) {
|
|
char theChar = *from++;
|
|
|
|
*to++=theChar; //always copy this char...
|
|
|
|
if((kNotFound!=FindChar1(aSet,aSetLen,0,theChar,PR_FALSE,aSetLen))){
|
|
while (from < end) {
|
|
theChar = *from++;
|
|
if(kNotFound==FindChar1(aSet,aSetLen,0,theChar,PR_FALSE,aSetLen)){
|
|
*to++ = theChar;
|
|
break;
|
|
}
|
|
} //while
|
|
} //if
|
|
} //if
|
|
*to = 0;
|
|
}
|
|
return to - aString;
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* This method compresses duplicate runs of a given char from the given buffer
|
|
*
|
|
* @update rickg 03.23.2000
|
|
* @param aString is the buffer to be manipulated
|
|
* @param aLength is the length of the buffer
|
|
* @param aSet tells us which chars to compress from given buffer
|
|
* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
|
|
* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
|
|
* @return the new length of the given buffer
|
|
*/
|
|
PRInt32 CompressChars2(PRUnichar* aString,PRUint32 aLength,const char* aSet);
|
|
PRInt32 CompressChars2(PRUnichar* aString,PRUint32 aLength,const char* aSet){
|
|
|
|
PRUnichar* from = aString;
|
|
PRUnichar* end = from + aLength;
|
|
PRUnichar* to = from;
|
|
|
|
//this code converts /n, /t, /r into normal space ' ';
|
|
//it also compresses runs of whitespace down to a single char...
|
|
if(aSet && aString && (0 < aLength)){
|
|
PRUint32 aSetLen=strlen(aSet);
|
|
|
|
while (from < end) {
|
|
PRUnichar theChar = *from++;
|
|
|
|
*to++=theChar; //always copy this char...
|
|
|
|
if((theChar<256) && (kNotFound!=FindChar1(aSet,aSetLen,0,theChar,PR_FALSE,aSetLen))){
|
|
while (from < end) {
|
|
theChar = *from++;
|
|
if(kNotFound==FindChar1(aSet,aSetLen,0,theChar,PR_FALSE,aSetLen)){
|
|
*to++ = theChar;
|
|
break;
|
|
}
|
|
} //while
|
|
} //if
|
|
} //if
|
|
*to = 0;
|
|
}
|
|
return to - (PRUnichar*)aString;
|
|
}
|
|
|
|
/**
|
|
* This method strips chars in a given set from the given buffer
|
|
*
|
|
* @update gess 01/04/99
|
|
* @param aString is the buffer to be manipulated
|
|
* @param aLength is the length of the buffer
|
|
* @param aSet tells us which chars to compress from given buffer
|
|
* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
|
|
* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
|
|
* @return the new length of the given buffer
|
|
*/
|
|
PRInt32 StripChars1(char* aString,PRUint32 aLength,const char* aSet);
|
|
PRInt32 StripChars1(char* aString,PRUint32 aLength,const char* aSet){
|
|
|
|
char* to = aString;
|
|
char* from = aString-1;
|
|
char* end = aString + aLength;
|
|
|
|
if(aSet && aString && (0 < aLength)){
|
|
PRUint32 aSetLen=strlen(aSet);
|
|
while (++from < end) {
|
|
char theChar = *from;
|
|
if(kNotFound==FindChar1(aSet,aSetLen,0,theChar,PR_FALSE,aSetLen)){
|
|
*to++ = theChar;
|
|
}
|
|
}
|
|
*to = 0;
|
|
}
|
|
return to - (char*)aString;
|
|
}
|
|
|
|
|
|
/**
|
|
* This method strips chars in a given set from the given buffer
|
|
*
|
|
* @update gess 01/04/99
|
|
* @param aString is the buffer to be manipulated
|
|
* @param aLength is the length of the buffer
|
|
* @param aSet tells us which chars to compress from given buffer
|
|
* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
|
|
* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
|
|
* @return the new length of the given buffer
|
|
*/
|
|
PRInt32 StripChars2(PRUnichar* aString,PRUint32 aLength,const char* aSet);
|
|
PRInt32 StripChars2(PRUnichar* aString,PRUint32 aLength,const char* aSet){
|
|
|
|
PRUnichar* to = aString;
|
|
PRUnichar* from = aString-1;
|
|
PRUnichar* end = to + aLength;
|
|
|
|
if(aSet && aString && (0 < aLength)){
|
|
PRUint32 aSetLen=strlen(aSet);
|
|
while (++from < end) {
|
|
PRUnichar theChar = *from;
|
|
//Note the test for ascii range below. If you have a real unicode char,
|
|
//and you're searching for chars in the (given) ascii string, there's no
|
|
//point in doing the real search since it's out of the ascii range.
|
|
if((255<theChar) || (kNotFound==FindChar1(aSet,aSetLen,0,theChar,PR_FALSE,aSetLen))){
|
|
*to++ = theChar;
|
|
}
|
|
}
|
|
*to = 0;
|
|
}
|
|
return to - (PRUnichar*)aString;
|
|
}
|
|
|
|
#endif
|