mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
466 lines
12 KiB
C++
466 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsLinebreakConverter.h"
|
|
|
|
#include "nsMemory.h"
|
|
#include "nsCRT.h"
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
GetLinebreakString
|
|
|
|
Could make this inline
|
|
----------------------------------------------------------------------------*/
|
|
static const char* GetLinebreakString(nsLinebreakConverter::ELinebreakType aBreakType)
|
|
{
|
|
static const char* const sLinebreaks[] = {
|
|
"", // any
|
|
NS_LINEBREAK, // platform
|
|
LFSTR, // content
|
|
CRLF, // net
|
|
CRSTR, // Mac
|
|
LFSTR, // Unix
|
|
CRLF, // Windows
|
|
" ", // space
|
|
nullptr
|
|
};
|
|
|
|
return sLinebreaks[aBreakType];
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
AppendLinebreak
|
|
|
|
Wee inline method to append a line break. Modifies ioDest.
|
|
----------------------------------------------------------------------------*/
|
|
template<class T>
|
|
void AppendLinebreak(T*& ioDest, const char* lineBreakStr)
|
|
{
|
|
*ioDest++ = *lineBreakStr;
|
|
|
|
if (lineBreakStr[1])
|
|
*ioDest++ = lineBreakStr[1];
|
|
}
|
|
|
|
/*----------------------------------------------------------------------------
|
|
CountChars
|
|
|
|
Counts occurrences of breakStr in aSrc
|
|
----------------------------------------------------------------------------*/
|
|
template<class T>
|
|
PRInt32 CountLinebreaks(const T* aSrc, PRInt32 inLen, const char* breakStr)
|
|
{
|
|
const T* src = aSrc;
|
|
const T* srcEnd = aSrc + inLen;
|
|
PRInt32 theCount = 0;
|
|
|
|
while (src < srcEnd)
|
|
{
|
|
if (*src == *breakStr)
|
|
{
|
|
src++;
|
|
|
|
if (breakStr[1])
|
|
{
|
|
if (src < srcEnd && *src == breakStr[1])
|
|
{
|
|
src++;
|
|
theCount++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
theCount++;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
src++;
|
|
}
|
|
}
|
|
|
|
return theCount;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertBreaks
|
|
|
|
ioLen *includes* a terminating null, if any
|
|
----------------------------------------------------------------------------*/
|
|
template<class T>
|
|
static T* ConvertBreaks(const T* inSrc, PRInt32& ioLen, const char* srcBreak, const char* destBreak)
|
|
{
|
|
NS_ASSERTION(inSrc && srcBreak && destBreak, "Got a null string");
|
|
|
|
T* resultString = nullptr;
|
|
|
|
// handle the no conversion case
|
|
if (nsCRT::strcmp(srcBreak, destBreak) == 0)
|
|
{
|
|
resultString = (T *)nsMemory::Alloc(sizeof(T) * ioLen);
|
|
if (!resultString) return nullptr;
|
|
memcpy(resultString, inSrc, sizeof(T) * ioLen); // includes the null, if any
|
|
return resultString;
|
|
}
|
|
|
|
PRInt32 srcBreakLen = strlen(srcBreak);
|
|
PRInt32 destBreakLen = strlen(destBreak);
|
|
|
|
// handle the easy case, where the string length does not change, and the
|
|
// breaks are only 1 char long, i.e. CR <-> LF
|
|
if (srcBreakLen == destBreakLen && srcBreakLen == 1)
|
|
{
|
|
resultString = (T *)nsMemory::Alloc(sizeof(T) * ioLen);
|
|
if (!resultString) return nullptr;
|
|
|
|
const T* src = inSrc;
|
|
const T* srcEnd = inSrc + ioLen; // includes null, if any
|
|
T* dst = resultString;
|
|
|
|
char srcBreakChar = *srcBreak; // we know it's one char long already
|
|
char dstBreakChar = *destBreak;
|
|
|
|
while (src < srcEnd)
|
|
{
|
|
if (*src == srcBreakChar)
|
|
{
|
|
*dst++ = dstBreakChar;
|
|
src++;
|
|
}
|
|
else
|
|
{
|
|
*dst++ = *src++;
|
|
}
|
|
}
|
|
|
|
// ioLen does not change
|
|
}
|
|
else
|
|
{
|
|
// src and dest termination is different length. Do it a slower way.
|
|
|
|
// count linebreaks in src. Assumes that chars in 2-char linebreaks are unique.
|
|
PRInt32 numLinebreaks = CountLinebreaks(inSrc, ioLen, srcBreak);
|
|
|
|
PRInt32 newBufLen = ioLen - (numLinebreaks * srcBreakLen) + (numLinebreaks * destBreakLen);
|
|
resultString = (T *)nsMemory::Alloc(sizeof(T) * newBufLen);
|
|
if (!resultString) return nullptr;
|
|
|
|
const T* src = inSrc;
|
|
const T* srcEnd = inSrc + ioLen; // includes null, if any
|
|
T* dst = resultString;
|
|
|
|
while (src < srcEnd)
|
|
{
|
|
if (*src == *srcBreak)
|
|
{
|
|
*dst++ = *destBreak;
|
|
if (destBreak[1])
|
|
*dst++ = destBreak[1];
|
|
|
|
src++;
|
|
if (src < srcEnd && srcBreak[1] && *src == srcBreak[1])
|
|
src++;
|
|
}
|
|
else
|
|
{
|
|
*dst++ = *src++;
|
|
}
|
|
}
|
|
|
|
ioLen = newBufLen;
|
|
}
|
|
|
|
return resultString;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertBreaksInSitu
|
|
|
|
Convert breaks in situ. Can only do this if the linebreak length
|
|
does not change.
|
|
----------------------------------------------------------------------------*/
|
|
template<class T>
|
|
static void ConvertBreaksInSitu(T* inSrc, PRInt32 inLen, char srcBreak, char destBreak)
|
|
{
|
|
T* src = inSrc;
|
|
T* srcEnd = inSrc + inLen;
|
|
|
|
while (src < srcEnd)
|
|
{
|
|
if (*src == srcBreak)
|
|
*src = destBreak;
|
|
|
|
src++;
|
|
}
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertUnknownBreaks
|
|
|
|
Convert unknown line breaks to the specified break.
|
|
|
|
This will convert CRLF pairs to one break, and single CR or LF to a break.
|
|
----------------------------------------------------------------------------*/
|
|
template<class T>
|
|
static T* ConvertUnknownBreaks(const T* inSrc, PRInt32& ioLen, const char* destBreak)
|
|
{
|
|
const T* src = inSrc;
|
|
const T* srcEnd = inSrc + ioLen; // includes null, if any
|
|
|
|
PRInt32 destBreakLen = strlen(destBreak);
|
|
PRInt32 finalLen = 0;
|
|
|
|
while (src < srcEnd)
|
|
{
|
|
if (*src == nsCRT::CR)
|
|
{
|
|
if (src < srcEnd && src[1] == nsCRT::LF)
|
|
{
|
|
// CRLF
|
|
finalLen += destBreakLen;
|
|
src++;
|
|
}
|
|
else
|
|
{
|
|
// Lone CR
|
|
finalLen += destBreakLen;
|
|
}
|
|
}
|
|
else if (*src == nsCRT::LF)
|
|
{
|
|
// Lone LF
|
|
finalLen += destBreakLen;
|
|
}
|
|
else
|
|
{
|
|
finalLen++;
|
|
}
|
|
src++;
|
|
}
|
|
|
|
T* resultString = (T *)nsMemory::Alloc(sizeof(T) * finalLen);
|
|
if (!resultString) return nullptr;
|
|
|
|
src = inSrc;
|
|
srcEnd = inSrc + ioLen; // includes null, if any
|
|
|
|
T* dst = resultString;
|
|
|
|
while (src < srcEnd)
|
|
{
|
|
if (*src == nsCRT::CR)
|
|
{
|
|
if (src < srcEnd && src[1] == nsCRT::LF)
|
|
{
|
|
// CRLF
|
|
AppendLinebreak(dst, destBreak);
|
|
src++;
|
|
}
|
|
else
|
|
{
|
|
// Lone CR
|
|
AppendLinebreak(dst, destBreak);
|
|
}
|
|
}
|
|
else if (*src == nsCRT::LF)
|
|
{
|
|
// Lone LF
|
|
AppendLinebreak(dst, destBreak);
|
|
}
|
|
else
|
|
{
|
|
*dst++ = *src;
|
|
}
|
|
src++;
|
|
}
|
|
|
|
ioLen = finalLen;
|
|
return resultString;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertLineBreaks
|
|
|
|
----------------------------------------------------------------------------*/
|
|
char* nsLinebreakConverter::ConvertLineBreaks(const char* aSrc,
|
|
ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen, PRInt32* outLen)
|
|
{
|
|
NS_ASSERTION(aDestBreaks != eLinebreakAny &&
|
|
aSrcBreaks != eLinebreakSpace, "Invalid parameter");
|
|
if (!aSrc) return nullptr;
|
|
|
|
PRInt32 sourceLen = (aSrcLen == kIgnoreLen) ? strlen(aSrc) + 1 : aSrcLen;
|
|
|
|
char* resultString;
|
|
if (aSrcBreaks == eLinebreakAny)
|
|
resultString = ConvertUnknownBreaks(aSrc, sourceLen, GetLinebreakString(aDestBreaks));
|
|
else
|
|
resultString = ConvertBreaks(aSrc, sourceLen, GetLinebreakString(aSrcBreaks), GetLinebreakString(aDestBreaks));
|
|
|
|
if (outLen)
|
|
*outLen = sourceLen;
|
|
return resultString;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertLineBreaksInSitu
|
|
|
|
----------------------------------------------------------------------------*/
|
|
nsresult nsLinebreakConverter::ConvertLineBreaksInSitu(char **ioBuffer, ELinebreakType aSrcBreaks,
|
|
ELinebreakType aDestBreaks, PRInt32 aSrcLen, PRInt32* outLen)
|
|
{
|
|
NS_ASSERTION(ioBuffer && *ioBuffer, "Null pointer passed");
|
|
if (!ioBuffer || !*ioBuffer) return NS_ERROR_NULL_POINTER;
|
|
|
|
NS_ASSERTION(aDestBreaks != eLinebreakAny &&
|
|
aSrcBreaks != eLinebreakSpace, "Invalid parameter");
|
|
|
|
PRInt32 sourceLen = (aSrcLen == kIgnoreLen) ? strlen(*ioBuffer) + 1 : aSrcLen;
|
|
|
|
// can we convert in-place?
|
|
const char* srcBreaks = GetLinebreakString(aSrcBreaks);
|
|
const char* dstBreaks = GetLinebreakString(aDestBreaks);
|
|
|
|
if ( (aSrcBreaks != eLinebreakAny) &&
|
|
(strlen(srcBreaks) == 1) &&
|
|
(strlen(dstBreaks) == 1) )
|
|
{
|
|
ConvertBreaksInSitu(*ioBuffer, sourceLen, *srcBreaks, *dstBreaks);
|
|
if (outLen)
|
|
*outLen = sourceLen;
|
|
}
|
|
else
|
|
{
|
|
char* destBuffer;
|
|
|
|
if (aSrcBreaks == eLinebreakAny)
|
|
destBuffer = ConvertUnknownBreaks(*ioBuffer, sourceLen, dstBreaks);
|
|
else
|
|
destBuffer = ConvertBreaks(*ioBuffer, sourceLen, srcBreaks, dstBreaks);
|
|
|
|
if (!destBuffer) return NS_ERROR_OUT_OF_MEMORY;
|
|
*ioBuffer = destBuffer;
|
|
if (outLen)
|
|
*outLen = sourceLen;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertUnicharLineBreaks
|
|
|
|
----------------------------------------------------------------------------*/
|
|
PRUnichar* nsLinebreakConverter::ConvertUnicharLineBreaks(const PRUnichar* aSrc,
|
|
ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen, PRInt32* outLen)
|
|
{
|
|
NS_ASSERTION(aDestBreaks != eLinebreakAny &&
|
|
aSrcBreaks != eLinebreakSpace, "Invalid parameter");
|
|
if (!aSrc) return nullptr;
|
|
|
|
PRInt32 bufLen = (aSrcLen == kIgnoreLen) ? NS_strlen(aSrc) + 1 : aSrcLen;
|
|
|
|
PRUnichar* resultString;
|
|
if (aSrcBreaks == eLinebreakAny)
|
|
resultString = ConvertUnknownBreaks(aSrc, bufLen, GetLinebreakString(aDestBreaks));
|
|
else
|
|
resultString = ConvertBreaks(aSrc, bufLen, GetLinebreakString(aSrcBreaks), GetLinebreakString(aDestBreaks));
|
|
|
|
if (outLen)
|
|
*outLen = bufLen;
|
|
return resultString;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertStringLineBreaks
|
|
|
|
----------------------------------------------------------------------------*/
|
|
nsresult nsLinebreakConverter::ConvertUnicharLineBreaksInSitu(PRUnichar **ioBuffer,
|
|
ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen, PRInt32* outLen)
|
|
{
|
|
NS_ASSERTION(ioBuffer && *ioBuffer, "Null pointer passed");
|
|
if (!ioBuffer || !*ioBuffer) return NS_ERROR_NULL_POINTER;
|
|
NS_ASSERTION(aDestBreaks != eLinebreakAny &&
|
|
aSrcBreaks != eLinebreakSpace, "Invalid parameter");
|
|
|
|
PRInt32 sourceLen = (aSrcLen == kIgnoreLen) ? NS_strlen(*ioBuffer) + 1 : aSrcLen;
|
|
|
|
// can we convert in-place?
|
|
const char* srcBreaks = GetLinebreakString(aSrcBreaks);
|
|
const char* dstBreaks = GetLinebreakString(aDestBreaks);
|
|
|
|
if ( (aSrcBreaks != eLinebreakAny) &&
|
|
(strlen(srcBreaks) == 1) &&
|
|
(strlen(dstBreaks) == 1) )
|
|
{
|
|
ConvertBreaksInSitu(*ioBuffer, sourceLen, *srcBreaks, *dstBreaks);
|
|
if (outLen)
|
|
*outLen = sourceLen;
|
|
}
|
|
else
|
|
{
|
|
PRUnichar* destBuffer;
|
|
|
|
if (aSrcBreaks == eLinebreakAny)
|
|
destBuffer = ConvertUnknownBreaks(*ioBuffer, sourceLen, dstBreaks);
|
|
else
|
|
destBuffer = ConvertBreaks(*ioBuffer, sourceLen, srcBreaks, dstBreaks);
|
|
|
|
if (!destBuffer) return NS_ERROR_OUT_OF_MEMORY;
|
|
*ioBuffer = destBuffer;
|
|
if (outLen)
|
|
*outLen = sourceLen;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
/*----------------------------------------------------------------------------
|
|
ConvertStringLineBreaks
|
|
|
|
----------------------------------------------------------------------------*/
|
|
nsresult nsLinebreakConverter::ConvertStringLineBreaks(nsString& ioString,
|
|
ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks)
|
|
{
|
|
|
|
NS_ASSERTION(aDestBreaks != eLinebreakAny &&
|
|
aSrcBreaks != eLinebreakSpace, "Invalid parameter");
|
|
|
|
// nothing to do
|
|
if (ioString.IsEmpty()) return NS_OK;
|
|
|
|
nsresult rv;
|
|
|
|
// remember the old buffer in case
|
|
// we blow it away later
|
|
nsString::char_iterator stringBuf;
|
|
ioString.BeginWriting(stringBuf);
|
|
|
|
PRInt32 newLen;
|
|
|
|
rv = ConvertUnicharLineBreaksInSitu(&stringBuf,
|
|
aSrcBreaks, aDestBreaks,
|
|
ioString.Length() + 1, &newLen);
|
|
if (NS_FAILED(rv)) return rv;
|
|
|
|
if (stringBuf != ioString.get())
|
|
ioString.Adopt(stringBuf);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
|