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gecko-dev/string/obsolete/nsStr.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Rick Gessner <rickg@netscape.com> (original author)
* Scott Collins <scc@mozilla.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsCharTraits_h___
#include "nsCharTraits.h"
#endif
#include "nsStrPrivate.h"
#include "nsStr.h"
#include "bufferRoutines.h"
#include <stdio.h> //only used for printf
/******************************************************************************************
MODULE NOTES:
This file contains the nsStr data structure.
This general purpose buffer management class is used as the basis for our strings.
It's benefits include:
1. An efficient set of library style functions for manipulating nsStrs
2. Support for 1 and 2 byte character strings (which can easily be increased to n)
3. Unicode awareness and interoperability.
*******************************************************************************************/
//static const char* kCallFindChar = "For better performance, call FindChar() for targets whose length==1.";
//static const char* kCallRFindChar = "For better performance, call RFindChar() for targets whose length==1.";
static const PRUnichar gCommonEmptyBuffer[1] = {0};
#ifdef NS_STR_STATS
static PRBool gStringAcquiredMemory = PR_TRUE;
#endif
/**
* This method initializes all the members of the nsStr structure
*
* @update gess10/30/98
* @param
* @return
*/
void nsStrPrivate::Initialize(nsStr& aDest,eCharSize aCharSize) {
aDest.mStr=(char*)gCommonEmptyBuffer;
aDest.mLength=0;
aDest.mCapacityAndFlags = 0;
// handled by mCapacityAndFlags
// aDest.SetInternalCapacity(0);
// aDest.SetOwnsBuffer(PR_FALSE);
aDest.SetCharSize(aCharSize);
}
/**
* This method initializes all the members of the nsStr structure
* @update gess10/30/98
* @param
* @return
*/
void nsStrPrivate::Initialize(nsStr& aDest,char* aCString,PRUint32 aCapacity,PRUint32 aLength,eCharSize aCharSize,PRBool aOwnsBuffer){
aDest.mStr=(aCString) ? aCString : (char*)gCommonEmptyBuffer;
aDest.mLength=aLength;
aDest.mCapacityAndFlags = 0;
aDest.SetInternalCapacity(aCapacity);
aDest.SetCharSize(aCharSize);
aDest.SetOwnsBuffer(aOwnsBuffer);
}
/**
* This member destroys the memory buffer owned by an nsStr object (if it actually owns it)
* @update gess10/30/98
* @param
* @return
*/
void nsStrPrivate::Destroy(nsStr& aDest) {
if((aDest.mStr) && (aDest.mStr!=(char*)gCommonEmptyBuffer)) {
Free(aDest);
}
}
/**
* This method gets called when the internal buffer needs
* to grow to a given size. The original contents are not preserved.
* @update gess 3/30/98
* @param aNewLength -- new capacity of string in charSize units
* @return void
*/
PRBool nsStrPrivate::EnsureCapacity(nsStr& aString,PRUint32 aNewLength) {
PRBool result=PR_TRUE;
if(aNewLength>aString.GetCapacity()) {
result=Realloc(aString,aNewLength);
if(aString.mStr)
AddNullTerminator(aString);
}
return result;
}
/**
* This method gets called when the internal buffer needs
* to grow to a given size. The original contents ARE preserved.
* @update gess 3/30/98
* @param aNewLength -- new capacity of string in charSize units
* @return void
*/
PRBool nsStrPrivate::GrowCapacity(nsStr& aDest,PRUint32 aNewLength) {
PRBool result=PR_TRUE;
if(aNewLength>aDest.GetCapacity()) {
nsStr theTempStr;
nsStrPrivate::Initialize(theTempStr,eCharSize(aDest.GetCharSize()));
// the new strategy is, allocate exact size, double on grows
if ( aDest.GetCapacity() ) {
PRUint32 newCapacity = aDest.GetCapacity();
while ( newCapacity < aNewLength )
newCapacity <<= 1;
aNewLength = newCapacity;
}
result=EnsureCapacity(theTempStr,aNewLength);
if(result) {
if(aDest.mLength) {
StrAppend(theTempStr,aDest,0,aDest.mLength);
}
Free(aDest);
aDest.mStr = theTempStr.mStr;
theTempStr.mStr=0; //make sure to null this out so that you don't lose the buffer you just stole...
aDest.mLength=theTempStr.mLength;
aDest.SetInternalCapacity(theTempStr.GetCapacity());
aDest.SetOwnsBuffer(theTempStr.GetOwnsBuffer());
}
}
return result;
}
/**
* Replaces the contents of aDest with aSource, up to aCount of chars.
* @update gess10/30/98
* @param aDest is the nsStr that gets changed.
* @param aSource is where chars are copied from
* @param aCount is the number of chars copied from aSource
*/
void nsStrPrivate::StrAssign(nsStr& aDest,const nsStr& aSource,PRUint32 anOffset,PRInt32 aCount){
if(&aDest!=&aSource){
StrTruncate(aDest,0);
StrAppend(aDest,aSource,anOffset,aCount);
}
}
/**
* This method appends the given nsStr to this one. Note that we have to
* pay attention to the underlying char-size of both structs.
* @update gess10/30/98
* @param aDest is the nsStr to be manipulated
* @param aSource is where char are copied from
* @aCount is the number of bytes to be copied
*/
void nsStrPrivate::StrAppend(nsStr& aDest,const nsStr& aSource,PRUint32 anOffset,PRInt32 aCount){
if(anOffset<aSource.mLength){
PRUint32 theRealLen=(aCount<0) ? aSource.mLength : MinInt(aCount,aSource.mLength);
PRUint32 theLength=(anOffset+theRealLen<aSource.mLength) ? theRealLen : (aSource.mLength-anOffset);
if(0<theLength){
PRBool isBigEnough=PR_TRUE;
if(aDest.mLength+theLength > aDest.GetCapacity()) {
isBigEnough=GrowCapacity(aDest,aDest.mLength+theLength);
}
if(isBigEnough) {
//now append new chars, starting at offset
(*gCopyChars[aSource.GetCharSize()][aDest.GetCharSize()])(aDest.mStr,aDest.mLength,aSource.mStr,anOffset,theLength);
aDest.mLength+=theLength;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}
}
}
}
/**
* This method inserts up to "aCount" chars from a source nsStr into a dest nsStr.
* @update gess10/30/98
* @param aDest is the nsStr that gets changed
* @param aDestOffset is where in aDest the insertion is to occur
* @param aSource is where chars are copied from
* @param aSrcOffset is where in aSource chars are copied from
* @param aCount is the number of chars from aSource to be inserted into aDest
*/
PRInt32 nsStrPrivate::GetSegmentLength(const nsStr& aSource,
PRUint32 aSrcOffset, PRInt32 aCount)
{
PRInt32 theRealLen=(aCount<0) ? aSource.mLength : MinInt(aCount,aSource.mLength);
PRInt32 theLength=(aSrcOffset+theRealLen<aSource.mLength) ? theRealLen : (aSource.mLength-aSrcOffset);
return theLength;
}
void nsStrPrivate::AppendForInsert(nsStr& aDest, PRUint32 aDestOffset, const nsStr& aSource, PRUint32 aSrcOffset, PRInt32 theLength) {
nsStr theTempStr;
nsStrPrivate::Initialize(theTempStr,eCharSize(aDest.GetCharSize()));
PRBool isBigEnough=EnsureCapacity(theTempStr,aDest.mLength+theLength); //grow the temp buffer to the right size
if(isBigEnough) {
if(aDestOffset) {
StrAppend(theTempStr,aDest,0,aDestOffset); //first copy leftmost data...
}
StrAppend(theTempStr,aSource,aSrcOffset,theLength); //next copy inserted (new) data
PRUint32 theRemains=aDest.mLength-aDestOffset;
if(theRemains) {
StrAppend(theTempStr,aDest,aDestOffset,theRemains); //next copy rightmost data
}
Free(aDest);
aDest.mStr = theTempStr.mStr;
theTempStr.mStr=0; //make sure to null this out so that you don't lose the buffer you just stole...
aDest.SetInternalCapacity(theTempStr.GetCapacity());
aDest.SetOwnsBuffer(theTempStr.GetOwnsBuffer());
}
}
void nsStrPrivate::StrInsert1into1( nsStr& aDest,PRUint32 aDestOffset,const nsStr& aSource,PRUint32 aSrcOffset,PRInt32 aCount){
NS_ASSERTION(aSource.GetCharSize() == eOneByte, "Must be 1 byte");
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
//there are a few cases for insert:
// 1. You're inserting chars into an empty string (assign)
// 2. You're inserting onto the end of a string (append)
// 3. You're inserting onto the 1..n-1 pos of a string (the hard case).
if(0<aSource.mLength){
if(aDest.mLength){
if(aDestOffset<aDest.mLength){
PRInt32 theLength = GetSegmentLength(aSource, aSrcOffset, aCount);
if(aSrcOffset<aSource.mLength) {
//here's the only new case we have to handle.
//chars are really being inserted into our buffer...
if(aDest.mLength+theLength > aDest.GetCapacity())
AppendForInsert(aDest, aDestOffset, aSource, aSrcOffset, theLength);
else {
//shift the chars right by theDelta...
ShiftCharsRight(aDest.mStr, aDest.mLength, aDestOffset, theLength);
//now insert new chars, starting at offset
CopyChars1To1(aDest.mStr, aDestOffset, aSource.mStr, aSrcOffset, theLength);
}
//finally, make sure to update the string length...
aDest.mLength+=theLength;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}//if
//else nothing to do!
}
else StrAppend(aDest,aSource,0,aCount);
}
else StrAppend(aDest,aSource,0,aCount);
}
}
void nsStrPrivate::StrInsert1into2( nsStr& aDest,PRUint32 aDestOffset,const nsStr& aSource,PRUint32 aSrcOffset,PRInt32 aCount){
NS_ASSERTION(aSource.GetCharSize() == eOneByte, "Must be 1 byte");
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
//there are a few cases for insert:
// 1. You're inserting chars into an empty string (assign)
// 2. You're inserting onto the end of a string (append)
// 3. You're inserting onto the 1..n-1 pos of a string (the hard case).
if(0<aSource.mLength){
if(aDest.mLength){
if(aDestOffset<aDest.mLength){
PRInt32 theLength = GetSegmentLength(aSource, aSrcOffset, aCount);
if(aSrcOffset<aSource.mLength) {
//here's the only new case we have to handle.
//chars are really being inserted into our buffer...
if(aDest.mLength+theLength > aDest.GetCapacity())
AppendForInsert(aDest, aDestOffset, aSource, aSrcOffset, theLength);
else {
//shift the chars right by theDelta...
ShiftDoubleCharsRight(aDest.mUStr, aDest.mLength, aDestOffset, theLength);
//now insert new chars, starting at offset
CopyChars1To2(aDest.mStr,aDestOffset,aSource.mStr,aSrcOffset,theLength);
}
//finally, make sure to update the string length...
aDest.mLength+=theLength;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}//if
//else nothing to do!
}
else StrAppend(aDest,aSource,0,aCount);
}
else StrAppend(aDest,aSource,0,aCount);
}
}
void nsStrPrivate::StrInsert2into2( nsStr& aDest,PRUint32 aDestOffset,const nsStr& aSource,PRUint32 aSrcOffset,PRInt32 aCount){
NS_ASSERTION(aSource.GetCharSize() == eTwoByte, "Must be 1 byte");
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
//there are a few cases for insert:
// 1. You're inserting chars into an empty string (assign)
// 2. You're inserting onto the end of a string (append)
// 3. You're inserting onto the 1..n-1 pos of a string (the hard case).
if(0<aSource.mLength){
if(aDest.mLength){
if(aDestOffset<aDest.mLength){
PRInt32 theLength = GetSegmentLength(aSource, aSrcOffset, aCount);
if(aSrcOffset<aSource.mLength) {
//here's the only new case we have to handle.
//chars are really being inserted into our buffer...
if(aDest.mLength+theLength > aDest.GetCapacity())
AppendForInsert(aDest, aDestOffset, aSource, aSrcOffset, theLength);
else {
//shift the chars right by theDelta...
ShiftDoubleCharsRight(aDest.mUStr, aDest.mLength, aDestOffset, theLength);
//now insert new chars, starting at offset
CopyChars2To2(aDest.mStr,aDestOffset,aSource.mStr,aSrcOffset,theLength);
}
//finally, make sure to update the string length...
aDest.mLength+=theLength;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}//if
//else nothing to do!
}
else StrAppend(aDest,aSource,0,aCount);
}
else StrAppend(aDest,aSource,0,aCount);
}
}
/**
* This method deletes up to aCount chars from aDest
* @update gess10/30/98
* @param aDest is the nsStr to be manipulated
* @param aDestOffset is where in aDest deletion is to occur
* @param aCount is the number of chars to be deleted in aDest
*/
void nsStrPrivate::Delete1(nsStr& aDest,PRUint32 aDestOffset,PRUint32 aCount){
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
if(aDestOffset<aDest.mLength){
PRUint32 theLength=GetDeleteLength(aDest, aDestOffset, aCount);
if(aDestOffset+theLength<aDest.mLength) {
//if you're here, it means we're cutting chars out of the middle of the string...
//so shift the chars left by theLength...
ShiftCharsLeft(aDest.mStr,aDest.mLength,aDestOffset,theLength);
aDest.mLength-=theLength;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}
else StrTruncate(aDest,aDestOffset);
}//if
}
void nsStrPrivate::Delete2(nsStr& aDest,PRUint32 aDestOffset,PRUint32 aCount){
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
if(aDestOffset<aDest.mLength){
PRUint32 theLength=GetDeleteLength(aDest, aDestOffset, aCount);
if(aDestOffset+theLength<aDest.mLength) {
//if you're here, it means we're cutting chars out of the middle of the string...
//so shift the chars left by theLength...
ShiftDoubleCharsLeft(aDest.mUStr,aDest.mLength,aDestOffset,theLength);
aDest.mLength-=theLength;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}
else StrTruncate(aDest,aDestOffset);
}//if
}
PRInt32 nsStrPrivate::GetDeleteLength(const nsStr& aDest, PRUint32 aDestOffset, PRUint32 aCount)
{
PRUint32 theDelta=aDest.mLength-aDestOffset;
PRUint32 theLength=(theDelta<aCount) ? theDelta : aCount;
return theLength;
}
/**
* This method truncates the given nsStr at given offset
* @update gess10/30/98
* @param aDest is the nsStr to be truncated
* @param aDestOffset is where in aDest truncation is to occur
*/
void nsStrPrivate::StrTruncate(nsStr& aDest,PRUint32 aDestOffset){
if(aDest.GetCapacity() && aDestOffset<=aDest.GetCapacity()){
aDest.mLength=aDestOffset;
AddNullTerminator(aDest);
NSSTR_SEEN(aDest);
}
}
/**
* This method removes characters from the given set from this string.
* NOTE: aSet is a char*, and it's length is computed using strlen, which assumes null termination.
*
* @update gess 11/7/99
* @param aDest
* @param aSet
* @param aEliminateLeading
* @param aEliminateTrailing
* @return nothing
*/
void nsStrPrivate::Trim(nsStr& aDest,const char* aSet,PRBool aEliminateLeading,PRBool aEliminateTrailing){
if((aDest.mLength>0) && aSet){
PRInt32 theIndex=-1;
PRInt32 theMax=aDest.mLength;
PRInt32 theSetLen=strlen(aSet);
if(aEliminateLeading) {
while(++theIndex<=theMax) {
PRUnichar theChar=aDest.GetCharAt(theIndex);
PRInt32 thePos=::FindChar1(aSet,theSetLen,0,theChar,theSetLen);
if(kNotFound==thePos)
break;
}
if(0<theIndex) {
if(theIndex<theMax) {
if (aDest.GetCharSize() == eOneByte)
Delete1(aDest,0,theIndex);
else
Delete2(aDest,0,theIndex);
}
else StrTruncate(aDest,0);
}
}
if(aEliminateTrailing) {
theIndex=aDest.mLength;
PRInt32 theNewLen=theIndex;
while(--theIndex>=0) {
PRUnichar theChar=aDest.GetCharAt(theIndex); //read at end now...
PRInt32 thePos=::FindChar1(aSet,theSetLen,0,theChar,theSetLen);
if(kNotFound<thePos)
theNewLen=theIndex;
else break;
}
if(theNewLen<theMax) {
StrTruncate(aDest,theNewLen);
}
}
}
}
/**
*
* @update gess1/7/99
* @param
* @return
*/
void nsStrPrivate::CompressSet1(nsStr& aDest,const char* aSet,PRBool aEliminateLeading,PRBool aEliminateTrailing){
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
Trim(aDest,aSet,aEliminateLeading,aEliminateTrailing);
PRUint32 aNewLen=CompressChars1(aDest.mStr,aDest.mLength,aSet);
aDest.mLength=aNewLen;
NSSTR_SEEN(aDest);
}
void nsStrPrivate::CompressSet2(nsStr& aDest,const char* aSet,PRBool aEliminateLeading,PRBool aEliminateTrailing){
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 bytes");
Trim(aDest,aSet,aEliminateLeading,aEliminateTrailing);
PRUint32 aNewLen=CompressChars2(aDest.mUStr,aDest.mLength,aSet);
aDest.mLength=aNewLen;
NSSTR_SEEN(aDest);
}
/**
*
* @update gess1/7/99
* @param
* @return
*/
void nsStrPrivate::StripChars1(nsStr& aDest,const char* aSet){
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
if((0<aDest.mLength) && (aSet)) {
PRUint32 aNewLen=::StripChars1(aDest.mStr, aDest.mLength, aSet);
aDest.mLength=aNewLen;
NSSTR_SEEN(aDest);
}
}
void nsStrPrivate::StripChars2(nsStr& aDest,const char* aSet){
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 bytes");
if((0<aDest.mLength) && (aSet)) {
PRUint32 aNewLen=::StripChars2(aDest.mUStr, aDest.mLength, aSet);
aDest.mLength=aNewLen;
NSSTR_SEEN(aDest);
}
}
/**************************************************************
Searching methods...
**************************************************************/
/**
* This searches aDest for a given substring
*
* @update gess 2/04/00: added aCount argument to restrict search
* @param aDest string to search
* @param aTarget is the substring you're trying to find.
* @param aIgnorecase indicates case sensitivity of search
* @param anOffset tells us where to start the search
* @param aCount tells us how many iterations to make from offset; -1 means the full length of the string
* @return index in aDest where member of aSet occurs, or -1 if not found
*/
PRInt32 nsStrPrivate::FindSubstr1in1(const nsStr& aDest,const nsStr& aTarget, PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
NS_ASSERTION(aTarget.GetCharSize() == eOneByte, "Must be 1 byte");
PRInt32 theMaxPos = aDest.mLength-aTarget.mLength; //this is the last pos that is feasible for starting the search, with given lengths...
if (theMaxPos<0) return kNotFound;
if(anOffset<0)
anOffset=0;
if((aDest.mLength<=0) || (anOffset>theMaxPos) || (aTarget.mLength==0))
return kNotFound;
if(aCount<0)
aCount = MaxInt(theMaxPos,1);
if (aCount <= 0)
return kNotFound;
const char* root = aDest.mStr;
const char* left = root + anOffset;
const char* last = left + aCount;
const char* max = root + theMaxPos;
const char* right = (last<max) ? last : max;
while(left<=right){
PRInt32 cmp=Compare1To1(left,aTarget.mStr,aTarget.mLength,aIgnoreCase);
if(0==cmp) {
return (left-root);
}
left++;
} //while
return kNotFound;
}
PRInt32 nsStrPrivate::FindSubstr1in2(const nsStr& aDest,const nsStr& aTarget, PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
NS_ASSERTION(aTarget.GetCharSize() == eOneByte, "Must be 1 byte");
PRInt32 theMaxPos = aDest.mLength-aTarget.mLength; //this is the last pos that is feasible for starting the search, with given lengths...
if (theMaxPos<0) return kNotFound;
if(anOffset<0)
anOffset=0;
if((aDest.mLength<=0) || (anOffset>theMaxPos) || (aTarget.mLength==0))
return kNotFound;
if(aCount<0)
aCount = MaxInt(theMaxPos,1);
if (aCount <= 0)
return kNotFound;
const PRUnichar* root = aDest.mUStr;
const PRUnichar* left = root+anOffset;
const PRUnichar* last = left+aCount;
const PRUnichar* max = root+theMaxPos;
const PRUnichar* right = (last<max) ? last : max;
while(left<=right){
PRInt32 cmp=Compare2To1(left,aTarget.mStr,aTarget.mLength,aIgnoreCase);
if(0==cmp) {
return (left-root);
}
left++;
} //while
return kNotFound;
}
PRInt32 nsStrPrivate::FindSubstr2in2(const nsStr& aDest,const nsStr& aTarget, PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
NS_ASSERTION(aTarget.GetCharSize() == eTwoByte, "Must be 2 byte");
PRInt32 theMaxPos = aDest.mLength-aTarget.mLength; //this is the last pos that is feasible for starting the search, with given lengths...
if (theMaxPos<0) return kNotFound;
if(anOffset<0)
anOffset=0;
if((aDest.mLength<=0) || (anOffset>theMaxPos) || (aTarget.mLength==0))
return kNotFound;
if(aCount<0)
aCount = MaxInt(theMaxPos,1);
if (aCount <= 0)
return kNotFound;
const PRUnichar* root = aDest.mUStr;
const PRUnichar* left = root+anOffset;
const PRUnichar* last = left+aCount;
const PRUnichar* max = root+theMaxPos;
const PRUnichar* right = (last<max) ? last : max;
while(left<=right){
PRInt32 cmp=Compare2To2(left,aTarget.mUStr,aTarget.mLength);
if(0==cmp) {
return (left-root);
}
left++;
} //while
return kNotFound;
}
/**
* This searches aDest for a given character
*
* @update gess 2/04/00: added aCount argument to restrict search
* @param aDest string to search
* @param char is the character you're trying to find.
* @param aIgnorecase indicates case sensitivity of search
* @param anOffset tells us where to start the search
* @param aCount tell us how many chars to search from offset
* @return index in aDest where member of aSet occurs, or -1 if not found
*/
PRInt32 nsStrPrivate::FindChar1(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
return ::FindChar1(aDest.mStr,aDest.mLength,anOffset,aChar,aCount);
}
PRInt32 nsStrPrivate::FindChar2(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
return ::FindChar2(aDest.mUStr,aDest.mLength,anOffset,aChar,aCount);
}
/**************************************************************
Reverse Searching methods...
**************************************************************/
/**
* This searches aDest (in reverse) for a given substring
*
* @update gess 2/18/00
* @param aDest string to search
* @param aTarget is the substring you're trying to find.
* @param aIgnorecase indicates case sensitivity of search
* @param anOffset tells us where to start the search (counting from left)
* @param aCount tell us how many iterations to perform from offset
* @return index in aDest where member of aSet occurs, or -1 if not found
*/
PRInt32 nsStrPrivate::RFindSubstr1in1(const nsStr& aDest,const nsStr& aTarget,PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
NS_ASSERTION(aTarget.GetCharSize() == eOneByte, "Must be 1 byte");
if(anOffset<0)
anOffset=(PRInt32)aDest.mLength-1;
if(aCount<0)
aCount = aDest.mLength;
if ((aDest.mLength <= 0) || (PRUint32(anOffset)>=aDest.mLength) || (aTarget.mLength==0))
return kNotFound;
if (aCount<=0)
return kNotFound;
const char* root = aDest.mStr;
const char* destLast = root+aDest.mLength; //pts to last char in aDest (likely null)
const char* rightmost = root+anOffset;
const char* min = rightmost-aCount + 1;
const char* leftmost = (min<root) ? root: min;
while(leftmost<=rightmost) {
//don't forget to divide by delta in next text (bug found by rhp)...
if(aTarget.mLength<=PRUint32(destLast-rightmost)) {
PRInt32 result=Compare1To1(rightmost,aTarget.mStr,aTarget.mLength,aIgnoreCase);
if(0==result) {
return (rightmost-root);
}
} //if
rightmost--;
} //while
return kNotFound;
}
PRInt32 nsStrPrivate::RFindSubstr1in2(const nsStr& aDest,const nsStr& aTarget,PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
NS_ASSERTION(aTarget.GetCharSize() == eOneByte, "Must be 1 byte");
if(anOffset<0)
anOffset=(PRInt32)aDest.mLength-1;
if(aCount<0)
aCount = aDest.mLength;
if ((aDest.mLength <= 0) || (PRUint32(anOffset)>=aDest.mLength) || (aTarget.mLength==0))
return kNotFound;
if (aCount<=0)
return kNotFound;
const PRUnichar* root = aDest.mUStr;
const PRUnichar* destLast = root+aDest.mLength; //pts to last char in aDest (likely null)
const PRUnichar* rightmost = root+anOffset;
const PRUnichar* min = rightmost-aCount+1;
const PRUnichar* leftmost = (min<root) ? root: min;
while(leftmost<=rightmost) {
//don't forget to divide by delta in next text (bug found by rhp)...
if(aTarget.mLength<=PRUint32(destLast-rightmost)) {
PRInt32 result = Compare2To1(rightmost,aTarget.mStr,aTarget.mLength,aIgnoreCase);
if(0==result) {
return rightmost-root;
}
} //if
rightmost--;
} //while
return kNotFound;
}
PRInt32 nsStrPrivate::RFindSubstr2in2(const nsStr& aDest,const nsStr& aTarget,PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
NS_ASSERTION(aTarget.GetCharSize() == eTwoByte, "Must be 2 byte");
if(anOffset<0)
anOffset=(PRInt32)aDest.mLength-1;
if(aCount<0)
aCount = aDest.mLength;
if ((aDest.mLength <= 0) || (PRUint32(anOffset)>=aDest.mLength) || (aTarget.mLength==0))
return kNotFound;
if (aCount<=0)
return kNotFound;
const PRUnichar* root = aDest.mUStr;
const PRUnichar* destLast = root+aDest.mLength; //pts to last char in aDest (likely null)
const PRUnichar* rightmost = root+anOffset;
const PRUnichar* min = rightmost-aCount+1;
const PRUnichar* leftmost = (min<root) ? root: min;
while(leftmost<=rightmost) {
//don't forget to divide by delta in next text (bug found by rhp)...
if(aTarget.mLength<=PRUint32(destLast-rightmost)) {
PRInt32 result = Compare2To2(rightmost,aTarget.mUStr,aTarget.mLength);
if(0==result) {
return (rightmost-root);
}
} //if
rightmost--;
} //while
return kNotFound;
}
/**
* This searches aDest (in reverse) for a given character
*
* @update gess 2/04/00
* @param aDest string to search
* @param char is the character you're trying to find.
* @param aIgnorecase indicates case sensitivity of search
* @param anOffset tells us where to start the search; -1 means start at very end (mLength)
* @param aCount tell us how many iterations to perform from offset; -1 means use full length.
* @return index in aDest where member of aSet occurs, or -1 if not found
*/
PRInt32 nsStrPrivate::RFindChar1(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 bytes");
return ::RFindChar1(aDest.mStr,aDest.mLength,anOffset,aChar,aCount);
}
PRInt32 nsStrPrivate::RFindChar2(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 bytes");
return ::RFindChar2(aDest.mUStr,aDest.mLength,anOffset,aChar,aCount);
}
// from the start of the old nsStrPrivate::StrCompare - now used as helper
// routines for nsStrPrivate::Compare1To1 and so forth
static inline PRInt32
GetCompareCount(const PRInt32 aDestLength, const PRInt32 aSourceLength,
PRInt32 aCount)
{
PRInt32 minlen=(aSourceLength<aDestLength) ? aSourceLength : aDestLength;
if(0==minlen) {
if ((aDestLength == 0) && (aSourceLength == 0))
return 0;
if (aDestLength == 0)
return -1;
return 1;
}
PRInt32 theCount = (aCount<0) ? minlen: MinInt(aCount,minlen);
return theCount;
}
static inline PRInt32
TranslateCompareResult(const PRInt32 aDestLength, const PRInt32& aSourceLength, PRInt32 result, PRInt32 aCount)
{
if (0==result && (-1==aCount ||
aDestLength < aCount ||
aSourceLength < aCount)) {
//Since the caller didn't give us a length to test, or strings shorter
//than aCount, and minlen characters matched, we have to assume that the
//longer string is greater.
if (aDestLength != aSourceLength) {
//we think they match, but we've only compared minlen characters.
//if the string lengths are different, then they don't really match.
result = (aDestLength<aSourceLength) ? -1 : 1;
}
}
return result;
}
/**
* Compare source and dest strings, up to an (optional max) number of chars
* @param aDest is the first str to compare
* @param aSource is the second str to compare
* @param aCount -- if (-1), then we use length of longer string; if (0<aCount) then it gives the max # of chars to compare
* @param aIgnorecase tells us whether to search with case sensitivity
* @return aDest<aSource=-1;aDest==aSource==0;aDest>aSource=1
*/
PRInt32 nsStrPrivate::StrCompare1To1(const nsStr& aDest,const nsStr& aSource,PRInt32 aCount,PRBool aIgnoreCase) {
NS_ASSERTION(aDest.GetCharSize() == eOneByte, "Must be 1 byte");
NS_ASSERTION(aSource.GetCharSize() == eOneByte, "Must be 1 byte");
if (aCount) {
PRInt32 theCount = GetCompareCount(aDest.mLength, aSource.mLength, aCount);
PRInt32 result = Compare1To1(aDest.mStr, aSource.mStr, theCount, aIgnoreCase);
result = TranslateCompareResult(aDest.mLength, aSource.mLength, result, aCount);
return result;
}
return 0;
}
PRInt32 nsStrPrivate::StrCompare2To1(const nsStr& aDest,const nsStr& aSource,PRInt32 aCount,PRBool aIgnoreCase) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
NS_ASSERTION(aSource.GetCharSize() == eOneByte, "Must be 1 byte");
if (aCount) {
PRInt32 theCount = GetCompareCount(aDest.mLength, aSource.mLength, aCount);
PRInt32 result = Compare2To1(aDest.mUStr, aSource.mStr, theCount, aIgnoreCase);
result = TranslateCompareResult(aDest.mLength, aSource.mLength, result, aCount);
return result;
}
return 0;
}
PRInt32 nsStrPrivate::StrCompare2To2(const nsStr& aDest,const nsStr& aSource,PRInt32 aCount) {
NS_ASSERTION(aDest.GetCharSize() == eTwoByte, "Must be 2 byte");
NS_ASSERTION(aSource.GetCharSize() == eTwoByte, "Must be 2 byte");
if (aCount) {
PRInt32 theCount = GetCompareCount(aDest.mLength, aSource.mLength, aCount);
PRInt32 result = Compare2To2(aDest.mUStr, aSource.mUStr, theCount);
result = TranslateCompareResult(aDest.mLength, aSource.mLength, result, aCount);
return result;
}
return 0;
}
/**
* Overwrites the contents of dest at offset with contents of aSource
*
* @param aDest is the first str to compare
* @param aSource is the second str to compare
* @param aDestOffset is the offset within aDest where source should be copied
* @return error code
*/
void nsStrPrivate::Overwrite(nsStr& aDest,const nsStr& aSource,PRInt32 aDestOffset) {
if(aDest.mLength && aSource.mLength) {
if((aDest.mLength-aDestOffset)>=aSource.mLength) {
//if you're here, then both dest and source have valid lengths
//and there's enough room in dest (at offset) to contain source.
(*gCopyChars[aSource.GetCharSize()][aDest.GetCharSize()])(aDest.mStr,aDestOffset,aSource.mStr,0,aSource.mLength);
}
}
}
//----------------------------------------------------------------------------------------
// allocate the given bytes, not including the null terminator
PRBool nsStrPrivate::Alloc(nsStr& aDest,PRUint32 aCount) {
// the new strategy is, allocate exact size, double on grows
aDest.SetInternalCapacity(aCount);
aDest.mStr = (char*)nsMemory::Alloc((aCount+1)<<aDest.GetCharSize());
if(aDest.mStr)
aDest.SetOwnsBuffer(PR_TRUE);
#ifdef NS_STR_STATS
gStringAcquiredMemory = (aDest.mStr != nsnull);
#endif
return (aDest.mStr != nsnull);
}
PRBool nsStrPrivate::Free(nsStr& aDest){
if(aDest.mStr){
if(aDest.GetOwnsBuffer()){
nsMemory::Free(aDest.mStr);
}
aDest.mStr=0;
aDest.SetOwnsBuffer(PR_FALSE);
return PR_TRUE;
}
return PR_FALSE;
}
PRBool nsStrPrivate::Realloc(nsStr& aDest,PRUint32 aCount){
nsStr temp;
memcpy(&temp,&aDest,sizeof(aDest));
PRBool result=Alloc(temp,aCount);
if(result) {
Free(aDest);
aDest.mStr=temp.mStr;
aDest.SetInternalCapacity(temp.GetCapacity());
aDest.SetOwnsBuffer(temp.GetOwnsBuffer());
}
return result;
}
#ifdef NS_STR_STATS
/**
* Retrieve last memory error
*
* @update gess 10/11/99
* @return memory error (usually returns PR_TRUE)
*/
PRBool nsStrPrivate::DidAcquireMemory(void) {
return gStringAcquiredMemory;
}
#endif
//----------------------------------------------------------------------------------------
CBufDescriptor::CBufDescriptor(char* aString,PRBool aStackBased,PRUint32 aCapacity,PRInt32 aLength) {
mBuffer=aString;
mCharSize=eOneByte;
mStackBased=aStackBased;
mIsConst=PR_FALSE;
mLength=mCapacity=0;
if(aString && aCapacity>1) {
mCapacity=aCapacity-1;
mLength=(-1==aLength) ? nsCharTraits<char>::length(aString) : aLength;
if(mLength>PRInt32(mCapacity))
mLength=mCapacity;
}
}
CBufDescriptor::CBufDescriptor(const char* aString,PRBool aStackBased,PRUint32 aCapacity,PRInt32 aLength) {
mBuffer=(char*)aString;
mCharSize=eOneByte;
mStackBased=aStackBased;
mIsConst=PR_TRUE;
mLength=mCapacity=0;
if(aString && aCapacity>1) {
mCapacity=aCapacity-1;
mLength=(-1==aLength) ? nsCharTraits<char>::length(aString) : aLength;
if(mLength>PRInt32(mCapacity))
mLength=mCapacity;
}
}
CBufDescriptor::CBufDescriptor(PRUnichar* aString,PRBool aStackBased,PRUint32 aCapacity,PRInt32 aLength) {
mBuffer=(char*)aString;
mCharSize=eTwoByte;
mStackBased=aStackBased;
mLength=mCapacity=0;
mIsConst=PR_FALSE;
if(aString && aCapacity>1) {
mCapacity=aCapacity-1;
mLength=(-1==aLength) ? nsCharTraits<PRUnichar>::length(aString) : aLength;
if(mLength>PRInt32(mCapacity))
mLength=mCapacity;
}
}
CBufDescriptor::CBufDescriptor(const PRUnichar* aString,PRBool aStackBased,PRUint32 aCapacity,PRInt32 aLength) {
mBuffer=(char*)aString;
mCharSize=eTwoByte;
mStackBased=aStackBased;
mLength=mCapacity=0;
mIsConst=PR_TRUE;
if(aString && aCapacity>1) {
mCapacity=aCapacity-1;
mLength=(-1==aLength) ? nsCharTraits<PRUnichar>::length(aString) : aLength;
if(mLength>PRInt32(mCapacity))
mLength=mCapacity;
}
}
//----------------------------------------------------------------------------------------
PRUint32
nsStrPrivate::HashCode(const nsStr& aDest)
{
PRUint32 h = 0;
if (aDest.GetCharSize() == eTwoByte) {
const PRUnichar* s = aDest.mUStr;
if (!s) return h;
PRUnichar c;
while ( (c = *s++) )
h = (h>>28) ^ (h<<4) ^ c;
return h;
} else {
const char* s = aDest.mStr;
if (!s) return h;
unsigned char c;
while ( (c = *s++) )
h = (h>>28) ^ (h<<4) ^ c;
return h;
}
}
#ifdef NS_STR_STATS
#include <ctype.h>
#ifdef XP_MAC
#define isascii(c) ((unsigned)(c) < 0x80)
#endif
void
nsStrPrivate::Print(const nsStr& aDest, FILE* out, PRBool truncate)
{
PRInt32 printLen = (PRInt32)aDest.mLength;
if (aDest.GetCharSize() == eOneByte) {
const char* chars = aDest.mStr;
while (printLen-- && (!truncate || *chars != '\n')) {
fputc(*chars++, out);
}
}
else {
const PRUnichar* chars = aDest.mUStr;
while (printLen-- && (!truncate || *chars != '\n')) {
if (isascii(*chars))
fputc((char)(*chars++), out);
else
fputc('-', out);
}
}
}
////////////////////////////////////////////////////////////////////////////////
// String Usage Statistics Routines
static PLHashTable* gStringInfo = nsnull;
PRLock* gStringInfoLock = nsnull;
PRBool gNoStringInfo = PR_FALSE;
nsStringInfo::nsStringInfo(nsStr& str)
: mCount(0)
{
nsStrPrivate::Initialize(mStr, str.GetCharSize());
nsStrPrivate::StrAssign(mStr, str, 0, -1);
// nsStrPrivate::Print(mStr, stdout);
// fputc('\n', stdout);
}
PR_EXTERN(PRHashNumber)
nsStr_Hash(const void* key)
{
nsStr* str = (nsStr*)key;
return nsStrPrivate::HashCode(*str);
}
nsStringInfo*
nsStringInfo::GetInfo(nsStr& str)
{
if (gStringInfo == nsnull) {
gStringInfo = PL_NewHashTable(1024,
nsStr_Hash,
nsStr_Compare,
PL_CompareValues,
NULL, NULL);
gStringInfoLock = PR_NewLock();
}
PR_Lock(gStringInfoLock);
nsStringInfo* info =
(nsStringInfo*)PL_HashTableLookup(gStringInfo, &str);
if (info == NULL) {
gNoStringInfo = PR_TRUE;
info = new nsStringInfo(str);
if (info) {
PLHashEntry* e = PL_HashTableAdd(gStringInfo, &info->mStr, info);
if (e == NULL) {
delete info;
info = NULL;
}
}
gNoStringInfo = PR_FALSE;
}
PR_Unlock(gStringInfoLock);
return info;
}
void
nsStringInfo::Seen(nsStr& str)
{
if (!gNoStringInfo) {
nsStringInfo* info = GetInfo(str);
info->mCount++;
}
}
void
nsStringInfo::Report(FILE* out)
{
if (gStringInfo) {
fprintf(out, "\n== String Stats\n");
PL_HashTableEnumerateEntries(gStringInfo, nsStringInfo::ReportEntry, out);
}
}
PRIntn
nsStringInfo::ReportEntry(PLHashEntry *he, PRIntn i, void *arg)
{
nsStringInfo* entry = (nsStringInfo*)he->value;
FILE* out = (FILE*)arg;
fprintf(out, "%d ==> (%d) ", entry->mCount, entry->mStr.mLength);
nsStrPrivate::Print(entry->mStr, out, PR_TRUE);
fputc('\n', out);
return HT_ENUMERATE_NEXT;
}
#endif // NS_STR_STATS
////////////////////////////////////////////////////////////////////////////////
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