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nsReadableUtils.cpp
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nsReadableUtils.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Scott Collins <scc@mozilla.org> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsReadableUtils.h"
#include "nsMemory.h"
#include "nsString.h"
#include "nsUTF8Utils.h"
NS_COM
void
LossyCopyUTF16toASCII( const nsAString& aSource, nsACString& aDest )
{
aDest.Truncate();
LossyAppendUTF16toASCII(aSource, aDest);
}
NS_COM
void
CopyASCIItoUTF16( const nsACString& aSource, nsAString& aDest )
{
aDest.Truncate();
AppendASCIItoUTF16(aSource, aDest);
}
NS_COM
void
LossyCopyUTF16toASCII( const PRUnichar* aSource, nsACString& aDest )
{
aDest.Truncate();
if (aSource) {
LossyAppendUTF16toASCII(nsDependentString(aSource), aDest);
}
}
NS_COM
void
CopyASCIItoUTF16( const char* aSource, nsAString& aDest )
{
aDest.Truncate();
if (aSource) {
AppendASCIItoUTF16(nsDependentCString(aSource), aDest);
}
}
NS_COM
void
CopyUTF16toUTF8( const nsAString& aSource, nsACString& aDest )
{
aDest.Truncate();
AppendUTF16toUTF8(aSource, aDest);
}
NS_COM
void
CopyUTF8toUTF16( const nsACString& aSource, nsAString& aDest )
{
aDest.Truncate();
AppendUTF8toUTF16(aSource, aDest);
}
NS_COM
void
CopyUTF16toUTF8( const PRUnichar* aSource, nsACString& aDest )
{
aDest.Truncate();
AppendUTF16toUTF8(aSource, aDest);
}
NS_COM
void
CopyUTF8toUTF16( const char* aSource, nsAString& aDest )
{
aDest.Truncate();
AppendUTF8toUTF16(aSource, aDest);
}
// Like GetMutableData, but returns false if it can't
// allocate enough memory (e.g. due to OOM) rather than
// returning zero (which could have other meanings) and
// throws away the out-param pointer.
PRBool
SetLengthForWriting(nsAString& aDest, PRUint32 aDesiredLength)
{
PRUnichar* dummy;
PRUint32 len = aDest.GetMutableData(&dummy, aDesiredLength);
return (len >= aDesiredLength);
}
PRBool
SetLengthForWritingC(nsACString& aDest, PRUint32 aDesiredLength)
{
char* dummy;
PRUint32 len = aDest.GetMutableData(&dummy, aDesiredLength);
return (len >= aDesiredLength);
}
NS_COM
void
LossyAppendUTF16toASCII( const nsAString& aSource, nsACString& aDest )
{
PRUint32 old_dest_length = aDest.Length();
if (!SetLengthForWritingC(aDest, old_dest_length + aSource.Length()))
return;
nsAString::const_iterator fromBegin, fromEnd;
nsACString::iterator dest;
aDest.BeginWriting(dest);
dest.advance(old_dest_length);
// right now, this won't work on multi-fragment destinations
LossyConvertEncoding16to8 converter(dest.get());
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
}
NS_COM
void
AppendASCIItoUTF16( const nsACString& aSource, nsAString& aDest )
{
PRUint32 old_dest_length = aDest.Length();
if (!SetLengthForWriting(aDest, old_dest_length + aSource.Length()))
return;
nsACString::const_iterator fromBegin, fromEnd;
nsAString::iterator dest;
aDest.BeginWriting(dest);
dest.advance(old_dest_length);
// right now, this won't work on multi-fragment destinations
LossyConvertEncoding8to16 converter(dest.get());
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
}
NS_COM
void
LossyAppendUTF16toASCII( const PRUnichar* aSource, nsACString& aDest )
{
if (aSource) {
LossyAppendUTF16toASCII(nsDependentString(aSource), aDest);
}
}
NS_COM
void
AppendASCIItoUTF16( const char* aSource, nsAString& aDest )
{
if (aSource) {
AppendASCIItoUTF16(nsDependentCString(aSource), aDest);
}
}
NS_COM
void
AppendUTF16toUTF8( const nsAString& aSource, nsACString& aDest )
{
nsAString::const_iterator source_start, source_end;
CalculateUTF8Size calculator;
copy_string(aSource.BeginReading(source_start),
aSource.EndReading(source_end), calculator);
PRUint32 count = calculator.Size();
if (count)
{
PRUint32 old_dest_length = aDest.Length();
// Grow the buffer if we need to.
if(!SetLengthForWritingC(aDest, old_dest_length + count))
return;
// All ready? Time to convert
ConvertUTF16toUTF8 converter(aDest.BeginWriting() + old_dest_length);
copy_string(aSource.BeginReading(source_start),
aSource.EndReading(source_end), converter);
NS_ASSERTION(converter.Size() == count,
"Unexpected disparity between CalculateUTF8Size and "
"ConvertUTF16toUTF8");
}
}
NS_COM
void
AppendUTF8toUTF16( const nsACString& aSource, nsAString& aDest )
{
nsACString::const_iterator source_start, source_end;
CalculateUTF8Length calculator;
copy_string(aSource.BeginReading(source_start),
aSource.EndReading(source_end), calculator);
PRUint32 count = calculator.Length();
// Avoid making the string mutable if we're appending an empty string
if (count)
{
PRUint32 old_dest_length = aDest.Length();
// Grow the buffer if we need to.
if(!SetLengthForWriting(aDest, old_dest_length + count))
return;
// All ready? Time to convert
ConvertUTF8toUTF16 converter(aDest.BeginWriting() + old_dest_length);
copy_string(aSource.BeginReading(source_start),
aSource.EndReading(source_end), converter);
NS_ASSERTION(converter.ErrorEncountered() ||
converter.Length() == count,
"CalculateUTF8Length produced the wrong length");
if (converter.ErrorEncountered())
{
NS_ERROR("Input wasn't UTF8 or incorrect length was calculated");
aDest.SetLength(old_dest_length);
}
}
}
NS_COM
void
AppendUTF16toUTF8( const PRUnichar* aSource, nsACString& aDest )
{
if (aSource) {
AppendUTF16toUTF8(nsDependentString(aSource), aDest);
}
}
NS_COM
void
AppendUTF8toUTF16( const char* aSource, nsAString& aDest )
{
if (aSource) {
AppendUTF8toUTF16(nsDependentCString(aSource), aDest);
}
}
/**
* A helper function that allocates a buffer of the desired character type big enough to hold a copy of the supplied string (plus a zero terminator).
*
* @param aSource an string you will eventually be making a copy of
* @return a new buffer (of the type specified by the second parameter) which you must free with |nsMemory::Free|.
*
*/
template <class FromStringT, class ToCharT>
inline
ToCharT*
AllocateStringCopy( const FromStringT& aSource, ToCharT* )
{
return static_cast<ToCharT*>(nsMemory::Alloc((aSource.Length()+1) * sizeof(ToCharT)));
}
NS_COM
char*
ToNewCString( const nsAString& aSource )
{
char* result = AllocateStringCopy(aSource, (char*)0);
if (!result)
return nsnull;
nsAString::const_iterator fromBegin, fromEnd;
LossyConvertEncoding16to8 converter(result);
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter).write_terminator();
return result;
}
NS_COM
char*
ToNewUTF8String( const nsAString& aSource, PRUint32 *aUTF8Count )
{
nsAString::const_iterator start, end;
CalculateUTF8Size calculator;
copy_string(aSource.BeginReading(start), aSource.EndReading(end),
calculator);
if (aUTF8Count)
*aUTF8Count = calculator.Size();
char *result = static_cast<char*>
(nsMemory::Alloc(calculator.Size() + 1));
if (!result)
return nsnull;
ConvertUTF16toUTF8 converter(result);
copy_string(aSource.BeginReading(start), aSource.EndReading(end),
converter).write_terminator();
NS_ASSERTION(calculator.Size() == converter.Size(), "length mismatch");
return result;
}
NS_COM
char*
ToNewCString( const nsACString& aSource )
{
// no conversion needed, just allocate a buffer of the correct length and copy into it
char* result = AllocateStringCopy(aSource, (char*)0);
if (!result)
return nsnull;
nsACString::const_iterator fromBegin, fromEnd;
char* toBegin = result;
*copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), toBegin) = char(0);
return result;
}
NS_COM
PRUnichar*
ToNewUnicode( const nsAString& aSource )
{
// no conversion needed, just allocate a buffer of the correct length and copy into it
PRUnichar* result = AllocateStringCopy(aSource, (PRUnichar*)0);
if (!result)
return nsnull;
nsAString::const_iterator fromBegin, fromEnd;
PRUnichar* toBegin = result;
*copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), toBegin) = PRUnichar(0);
return result;
}
NS_COM
PRUnichar*
ToNewUnicode( const nsACString& aSource )
{
PRUnichar* result = AllocateStringCopy(aSource, (PRUnichar*)0);
if (!result)
return nsnull;
nsACString::const_iterator fromBegin, fromEnd;
LossyConvertEncoding8to16 converter(result);
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter).write_terminator();
return result;
}
NS_COM
PRUnichar*
UTF8ToNewUnicode( const nsACString& aSource, PRUint32 *aUTF16Count )
{
nsACString::const_iterator start, end;
CalculateUTF8Length calculator;
copy_string(aSource.BeginReading(start), aSource.EndReading(end),
calculator);
if (aUTF16Count)
*aUTF16Count = calculator.Length();
PRUnichar *result = static_cast<PRUnichar*>
(nsMemory::Alloc(sizeof(PRUnichar) * (calculator.Length() + 1)));
if (!result)
return nsnull;
ConvertUTF8toUTF16 converter(result);
copy_string(aSource.BeginReading(start), aSource.EndReading(end),
converter).write_terminator();
NS_ASSERTION(calculator.Length() == converter.Length(), "length mismatch");
return result;
}
NS_COM
PRUnichar*
CopyUnicodeTo( const nsAString& aSource, PRUint32 aSrcOffset, PRUnichar* aDest, PRUint32 aLength )
{
nsAString::const_iterator fromBegin, fromEnd;
PRUnichar* toBegin = aDest;
copy_string(aSource.BeginReading(fromBegin).advance( PRInt32(aSrcOffset) ), aSource.BeginReading(fromEnd).advance( PRInt32(aSrcOffset+aLength) ), toBegin);
return aDest;
}
NS_COM
void
CopyUnicodeTo( const nsAString::const_iterator& aSrcStart,
const nsAString::const_iterator& aSrcEnd,
nsAString& aDest )
{
nsAString::iterator writer;
if (!SetLengthForWriting(aDest, Distance(aSrcStart, aSrcEnd)))
return;
aDest.BeginWriting(writer);
nsAString::const_iterator fromBegin(aSrcStart);
copy_string(fromBegin, aSrcEnd, writer);
}
NS_COM
void
AppendUnicodeTo( const nsAString::const_iterator& aSrcStart,
const nsAString::const_iterator& aSrcEnd,
nsAString& aDest )
{
nsAString::iterator writer;
PRUint32 oldLength = aDest.Length();
if(!SetLengthForWriting(aDest, oldLength + Distance(aSrcStart, aSrcEnd)))
return;
aDest.BeginWriting(writer).advance(oldLength);
nsAString::const_iterator fromBegin(aSrcStart);
copy_string(fromBegin, aSrcEnd, writer);
}
NS_COM
PRBool
IsASCII( const nsAString& aString )
{
static const PRUnichar NOT_ASCII = PRUnichar(~0x007F);
// Don't want to use |copy_string| for this task, since we can stop at the first non-ASCII character
nsAString::const_iterator iter, done_reading;
aString.BeginReading(iter);
aString.EndReading(done_reading);
const PRUnichar* c = iter.get();
const PRUnichar* end = done_reading.get();
while ( c < end )
{
if ( *c++ & NOT_ASCII )
return PR_FALSE;
}
return PR_TRUE;
}
NS_COM
PRBool
IsASCII( const nsACString& aString )
{
static const char NOT_ASCII = char(~0x7F);
// Don't want to use |copy_string| for this task, since we can stop at the first non-ASCII character
nsACString::const_iterator iter, done_reading;
aString.BeginReading(iter);
aString.EndReading(done_reading);
const char* c = iter.get();
const char* end = done_reading.get();
while ( c < end )
{
if ( *c++ & NOT_ASCII )
return PR_FALSE;
}
return PR_TRUE;
}
NS_COM
PRBool
IsUTF8( const nsACString& aString )
{
nsReadingIterator<char> done_reading;
aString.EndReading(done_reading);
PRInt32 state = 0;
PRBool overlong = PR_FALSE;
PRBool surrogate = PR_FALSE;
PRBool nonchar = PR_FALSE;
PRUint16 olupper = 0; // overlong byte upper bound.
PRUint16 slower = 0; // surrogate byte lower bound.
nsReadingIterator<char> iter;
aString.BeginReading(iter);
const char* ptr = iter.get();
const char* end = done_reading.get();
while ( ptr < end )
{
PRUint8 c;
if (0 == state)
{
c = *ptr++;
if ( UTF8traits::isASCII(c) )
continue;
if ( c <= 0xC1 ) // [80-BF] where not expected, [C0-C1] for overlong.
return PR_FALSE;
else if ( UTF8traits::is2byte(c) )
state = 1;
else if ( UTF8traits::is3byte(c) )
{
state = 2;
if ( c == 0xE0 ) // to exclude E0[80-9F][80-BF]
{
overlong = PR_TRUE;
olupper = 0x9F;
}
else if ( c == 0xED ) // ED[A0-BF][80-BF] : surrogate codepoint
{
surrogate = PR_TRUE;
slower = 0xA0;
}
else if ( c == 0xEF ) // EF BF [BE-BF] : non-character
nonchar = PR_TRUE;
}
else if ( c <= 0xF4 ) // XXX replace /w UTF8traits::is4byte when it's updated to exclude [F5-F7].(bug 199090)
{
state = 3;
nonchar = PR_TRUE;
if ( c == 0xF0 ) // to exclude F0[80-8F][80-BF]{2}
{
overlong = PR_TRUE;
olupper = 0x8F;
}
else if ( c == 0xF4 ) // to exclude F4[90-BF][80-BF]
{
// actually not surrogates but codepoints beyond 0x10FFFF
surrogate = PR_TRUE;
slower = 0x90;
}
}
else
return PR_FALSE; // Not UTF-8 string
}
while ( ptr < end && state )
{
c = *ptr++;
--state;
// non-character : EF BF [BE-BF] or F[0-7] [89AB]F BF [BE-BF]
if ( nonchar &&
( ( !state && c < 0xBE ) ||
( state == 1 && c != 0xBF ) ||
( state == 2 && 0x0F != (0x0F & c) )))
nonchar = PR_FALSE;
if ( !UTF8traits::isInSeq(c) || ( overlong && c <= olupper ) ||
( surrogate && slower <= c ) || ( nonchar && !state ))
return PR_FALSE; // Not UTF-8 string
overlong = surrogate = PR_FALSE;
}
}
return !state; // state != 0 at the end indicates an invalid UTF-8 seq.
}
/**
* A character sink for in-place case conversion.
*/
class ConvertToUpperCase
{
public:
typedef char value_type;
PRUint32
write( const char* aSource, PRUint32 aSourceLength )
{
char* cp = const_cast<char*>(aSource);
const char* end = aSource + aSourceLength;
while (cp != end) {
char ch = *cp;
if ((ch >= 'a') && (ch <= 'z'))
*cp = ch - ('a' - 'A');
++cp;
}
return aSourceLength;
}
};
NS_COM
void
ToUpperCase( nsCSubstring& aCString )
{
ConvertToUpperCase converter;
char* start;
converter.write(aCString.BeginWriting(start), aCString.Length());
}
/**
* A character sink for copying with case conversion.
*/
class CopyToUpperCase
{
public:
typedef char value_type;
CopyToUpperCase( nsACString::iterator& aDestIter )
: mIter(aDestIter)
{
}
PRUint32
write( const char* aSource, PRUint32 aSourceLength )
{
PRUint32 len = PR_MIN(PRUint32(mIter.size_forward()), aSourceLength);
char* cp = mIter.get();
const char* end = aSource + len;
while (aSource != end) {
char ch = *aSource;
if ((ch >= 'a') && (ch <= 'z'))
*cp = ch - ('a' - 'A');
else
*cp = ch;
++aSource;
++cp;
}
mIter.advance(len);
return len;
}
protected:
nsACString::iterator& mIter;
};
NS_COM
void
ToUpperCase( const nsACString& aSource, nsACString& aDest )
{
nsACString::const_iterator fromBegin, fromEnd;
nsACString::iterator toBegin;
if (!SetLengthForWritingC(aDest, aSource.Length()))
return;
CopyToUpperCase converter(aDest.BeginWriting(toBegin));
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
}
/**
* A character sink for case conversion.
*/
class ConvertToLowerCase
{
public:
typedef char value_type;
PRUint32
write( const char* aSource, PRUint32 aSourceLength )
{
char* cp = const_cast<char*>(aSource);
const char* end = aSource + aSourceLength;
while (cp != end) {
char ch = *cp;
if ((ch >= 'A') && (ch <= 'Z'))
*cp = ch + ('a' - 'A');
++cp;
}
return aSourceLength;
}
};
NS_COM
void
ToLowerCase( nsCSubstring& aCString )
{
ConvertToLowerCase converter;
char* start;
converter.write(aCString.BeginWriting(start), aCString.Length());
}
/**
* A character sink for copying with case conversion.
*/
class CopyToLowerCase
{
public:
typedef char value_type;
CopyToLowerCase( nsACString::iterator& aDestIter )
: mIter(aDestIter)
{
}
PRUint32
write( const char* aSource, PRUint32 aSourceLength )
{
PRUint32 len = PR_MIN(PRUint32(mIter.size_forward()), aSourceLength);
char* cp = mIter.get();
const char* end = aSource + len;
while (aSource != end) {
char ch = *aSource;
if ((ch >= 'A') && (ch <= 'Z'))
*cp = ch + ('a' - 'A');
else
*cp = ch;
++aSource;
++cp;
}
mIter.advance(len);
return len;
}
protected:
nsACString::iterator& mIter;
};
NS_COM
void
ToLowerCase( const nsACString& aSource, nsACString& aDest )
{
nsACString::const_iterator fromBegin, fromEnd;
nsACString::iterator toBegin;
if (!SetLengthForWritingC(aDest, aSource.Length()))
return;
CopyToLowerCase converter(aDest.BeginWriting(toBegin));
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
}
NS_COM
PRBool
ParseString(const nsACString& aSource, char aDelimiter,
nsTArray<nsCString>& aArray)
{
nsACString::const_iterator start, end;
aSource.BeginReading(start);
aSource.EndReading(end);
PRUint32 oldLength = aArray.Length();
for (;;)
{
nsACString::const_iterator delimiter = start;
FindCharInReadable(aDelimiter, delimiter, end);
if (delimiter != start)
{
if (!aArray.AppendElement(Substring(start, delimiter)))
{
aArray.RemoveElementsAt(oldLength, aArray.Length() - oldLength);
return PR_FALSE;
}
}
if (delimiter == end)
break;
start = ++delimiter;
if (start == end)
break;
}
return PR_TRUE;
}
template <class StringT, class IteratorT, class Comparator>
PRBool
FindInReadable_Impl( const StringT& aPattern, IteratorT& aSearchStart, IteratorT& aSearchEnd, const Comparator& compare )
{
PRBool found_it = PR_FALSE;
// only bother searching at all if we're given a non-empty range to search
if ( aSearchStart != aSearchEnd )
{
IteratorT aPatternStart, aPatternEnd;
aPattern.BeginReading(aPatternStart);
aPattern.EndReading(aPatternEnd);
// outer loop keeps searching till we find it or run out of string to search
while ( !found_it )
{
// fast inner loop (that's what it's called, not what it is) looks for a potential match
while ( aSearchStart != aSearchEnd &&
compare(aPatternStart.get(), aSearchStart.get(), 1, 1) )
++aSearchStart;
// if we broke out of the `fast' loop because we're out of string ... we're done: no match
if ( aSearchStart == aSearchEnd )
break;
// otherwise, we're at a potential match, let's see if we really hit one
IteratorT testPattern(aPatternStart);
IteratorT testSearch(aSearchStart);
// slow inner loop verifies the potential match (found by the `fast' loop) at the current position
for(;;)
{
// we already compared the first character in the outer loop,
// so we'll advance before the next comparison
++testPattern;
++testSearch;
// if we verified all the way to the end of the pattern, then we found it!
if ( testPattern == aPatternEnd )
{
found_it = PR_TRUE;
aSearchEnd = testSearch; // return the exact found range through the parameters
break;
}
// if we got to end of the string we're searching before we hit the end of the
// pattern, we'll never find what we're looking for
if ( testSearch == aSearchEnd )
{
aSearchStart = aSearchEnd;
break;
}
// else if we mismatched ... it's time to advance to the next search position
// and get back into the `fast' loop
if ( compare(testPattern.get(), testSearch.get(), 1, 1) )
{
++aSearchStart;
break;
}
}
}
}
return found_it;
}
/**
* This searches the entire string from right to left, and returns the first match found, if any.
*/
template <class StringT, class IteratorT, class Comparator>
PRBool
RFindInReadable_Impl( const StringT& aPattern, IteratorT& aSearchStart, IteratorT& aSearchEnd, const Comparator& compare )
{
IteratorT patternStart, patternEnd, searchEnd = aSearchEnd;
aPattern.BeginReading(patternStart);
aPattern.EndReading(patternEnd);
// Point to the last character in the pattern
--patternEnd;
// outer loop keeps searching till we run out of string to search
while ( aSearchStart != searchEnd )
{
// Point to the end position of the next possible match
--searchEnd;
// Check last character, if a match, explore further from here
if ( compare(patternEnd.get(), searchEnd.get(), 1, 1) == 0 )
{
// We're at a potential match, let's see if we really hit one
IteratorT testPattern(patternEnd);
IteratorT testSearch(searchEnd);
// inner loop verifies the potential match at the current position
do
{
// if we verified all the way to the end of the pattern, then we found it!
if ( testPattern == patternStart )
{
aSearchStart = testSearch; // point to start of match
aSearchEnd = ++searchEnd; // point to end of match
return PR_TRUE;
}
// if we got to end of the string we're searching before we hit the end of the
// pattern, we'll never find what we're looking for
if ( testSearch == aSearchStart )
{
aSearchStart = aSearchEnd;
return PR_FALSE;
}
// test previous character for a match
--testPattern;
--testSearch;
}
while ( compare(testPattern.get(), testSearch.get(), 1, 1) == 0 );
}
}
aSearchStart = aSearchEnd;
return PR_FALSE;
}
NS_COM
PRBool
FindInReadable( const nsAString& aPattern, nsAString::const_iterator& aSearchStart, nsAString::const_iterator& aSearchEnd, const nsStringComparator& aComparator )
{
return FindInReadable_Impl(aPattern, aSearchStart, aSearchEnd, aComparator);
}
NS_COM
PRBool
FindInReadable( const nsACString& aPattern, nsACString::const_iterator& aSearchStart, nsACString::const_iterator& aSearchEnd, const nsCStringComparator& aComparator)
{
return FindInReadable_Impl(aPattern, aSearchStart, aSearchEnd, aComparator);
}
NS_COM
PRBool
CaseInsensitiveFindInReadable( const nsACString& aPattern, nsACString::const_iterator& aSearchStart, nsACString::const_iterator& aSearchEnd )
{
return FindInReadable_Impl(aPattern, aSearchStart, aSearchEnd, nsCaseInsensitiveCStringComparator());
}
NS_COM
PRBool
RFindInReadable( const nsAString& aPattern, nsAString::const_iterator& aSearchStart, nsAString::const_iterator& aSearchEnd, const nsStringComparator& aComparator)
{
return RFindInReadable_Impl(aPattern, aSearchStart, aSearchEnd, aComparator);
}
NS_COM
PRBool
RFindInReadable( const nsACString& aPattern, nsACString::const_iterator& aSearchStart, nsACString::const_iterator& aSearchEnd, const nsCStringComparator& aComparator)
{
return RFindInReadable_Impl(aPattern, aSearchStart, aSearchEnd, aComparator);
}
NS_COM
PRBool
FindCharInReadable( PRUnichar aChar, nsAString::const_iterator& aSearchStart, const nsAString::const_iterator& aSearchEnd )
{
PRInt32 fragmentLength = aSearchEnd.get() - aSearchStart.get();
const PRUnichar* charFoundAt = nsCharTraits<PRUnichar>::find(aSearchStart.get(), fragmentLength, aChar);
if ( charFoundAt ) {
aSearchStart.advance( charFoundAt - aSearchStart.get() );
return PR_TRUE;
}
aSearchStart.advance(fragmentLength);
return PR_FALSE;
}
NS_COM
PRBool
FindCharInReadable( char aChar, nsACString::const_iterator& aSearchStart, const nsACString::const_iterator& aSearchEnd )
{
PRInt32 fragmentLength = aSearchEnd.get() - aSearchStart.get();
const char* charFoundAt = nsCharTraits<char>::find(aSearchStart.get(), fragmentLength, aChar);
if ( charFoundAt ) {
aSearchStart.advance( charFoundAt - aSearchStart.get() );
return PR_TRUE;
}
aSearchStart.advance(fragmentLength);
return PR_FALSE;
}
NS_COM
PRUint32
CountCharInReadable( const nsAString& aStr,
PRUnichar aChar )
{
PRUint32 count = 0;
nsAString::const_iterator begin, end;
aStr.BeginReading(begin);
aStr.EndReading(end);
while (begin != end) {
if (*begin == aChar) {
++count;
}
++begin;
}
return count;
}