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-rw-r--r--src/libs/xpcom18a4/xpcom/io/nsLinebreakConverter.cpp495
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diff --git a/src/libs/xpcom18a4/xpcom/io/nsLinebreakConverter.cpp b/src/libs/xpcom18a4/xpcom/io/nsLinebreakConverter.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) 1998
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * 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 "nsLinebreakConverter.h"
+
+#include "nsMemory.h"
+#include "nsCRT.h"
+
+
+#if defined(XP_WIN) && defined(_MSC_VER) && (_MSC_VER <= 1100)
+#define LOSER_CHAR_CAST(t) (char *)(t)
+#define LOSER_UNICHAR_CAST(t) (PRUnichar *)(t)
+#else
+#define LOSER_CHAR_CAST(t) (t)
+#define LOSER_UNICHAR_CAST(t) (t)
+#endif
+
+/*----------------------------------------------------------------------------
+ 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
+ nsnull
+ };
+
+ 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 (src < srcEnd && breakStr[1] && *src == breakStr[1])
+ src ++;
+
+ 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 = nsnull;
+
+ // handle the no conversion case
+ if (nsCRT::strcmp(srcBreak, destBreak) == 0)
+ {
+ resultString = (T *)nsMemory::Alloc(sizeof(T) * ioLen);
+ if (!resultString) return nsnull;
+ 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 nsnull;
+
+ 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 nsnull;
+
+ 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 nsnull;
+
+ 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;
+}
+
+
+#ifdef XP_MAC
+#pragma mark -
+#endif
+
+
+/*----------------------------------------------------------------------------
+ ConvertLineBreaks
+
+----------------------------------------------------------------------------*/
+char* nsLinebreakConverter::ConvertLineBreaks(const char* aSrc,
+ ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen, PRInt32* outLen)
+{
+ NS_ASSERTION(aDestBreaks != eLinebreakAny, "Invalid parameter");
+ if (!aSrc) return nsnull;
+
+ PRInt32 sourceLen = (aSrcLen == kIgnoreLen) ? strlen(aSrc) + 1 : aSrcLen;
+
+ char* resultString;
+ if (aSrcBreaks == eLinebreakAny)
+ resultString = ConvertUnknownBreaks(LOSER_CHAR_CAST(aSrc), sourceLen, GetLinebreakString(aDestBreaks));
+ else
+ resultString = ConvertBreaks(LOSER_CHAR_CAST(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, "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, "Invalid parameter");
+ if (!aSrc) return nsnull;
+
+ PRInt32 bufLen = (aSrcLen == kIgnoreLen) ? nsCRT::strlen(aSrc) + 1 : aSrcLen;
+
+ PRUnichar* resultString;
+ if (aSrcBreaks == eLinebreakAny)
+ resultString = ConvertUnknownBreaks(LOSER_UNICHAR_CAST(aSrc), bufLen, GetLinebreakString(aDestBreaks));
+ else
+ resultString = ConvertBreaks(LOSER_UNICHAR_CAST(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, "Invalid parameter");
+
+ PRInt32 sourceLen = (aSrcLen == kIgnoreLen) ? nsCRT::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, "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;
+}
+
+
+