/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * 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 Netscape are * Copyright (C) 1998 Netscape Communications Corporation. All * Rights Reserved. * * Contributor(s): */ #ifndef nsLinebreakConverter_h_ #define nsLinebreakConverter_h_ #include "nscore.h" #include "nsString.h" // utility class for converting between different line breaks. class NS_COM nsLinebreakConverter { public: // Note: enum must match char* array in GetLinebreakString typedef enum { eLinebreakAny, // any kind of linebreak (i.e. "don't care" source) eLinebreakPlatform, // platform linebreak eLinebreakContent, // Content model linebreak (LF) eLinebreakNet, // Form submission linebreak (CRLF) eLinebreakMac, // CR eLinebreakUnix, // LF eLinebreakWindows // CRLF } ELinebreakType; enum { kIgnoreLen = -1 }; /* ConvertLineBreaks * Convert line breaks in the supplied string, allocating and returning * a new buffer. Returns nsnull on failure. * @param aSrc: the source string. if aSrcLen == kIgnoreLen this string is assumed * to be null terminated, otherwise it must be at least aSrcLen long. * @param aSrcBreaks: the line breaks in the source. If unknown, pass eLinebreakAny. * If known, pass the known value, as this may be more efficient. * @param aDestBreaks: the line breaks you want in the output. * @param aSrcLen: length of the source. If -1, the source is assumed to be a null- * terminated string. * @param aOutLen: used to return character length of returned buffer, if not null. */ static char* ConvertLineBreaks(const char* aSrc, ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen = kIgnoreLen, PRInt32* aOutLen = nsnull); /* ConvertUnicharLineBreaks * Convert line breaks in the supplied string, allocating and returning * a new buffer. Returns nsnull on failure. * @param aSrc: the source string. if aSrcLen == kIgnoreLen this string is assumed * to be null terminated, otherwise it must be at least aSrcLen long. * @param aSrcBreaks: the line breaks in the source. If unknown, pass eLinebreakAny. * If known, pass the known value, as this may be more efficient. * @param aDestBreaks: the line breaks you want in the output. * @param aSrcLen: length of the source, in characters. If -1, the source is assumed to be a null- * terminated string. * @param aOutLen: used to return character length of returned buffer, if not null. */ static PRUnichar* ConvertUnicharLineBreaks(const PRUnichar* aSrc, ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen = kIgnoreLen, PRInt32* aOutLen = nsnull); /* ConvertStringLineBreaks * Convert line breaks in the supplied string, changing the string buffer (i.e. in-place conversion) * @param ioString: the string to be converted. * @param aSrcBreaks: the line breaks in the source. If unknown, pass eLinebreakAny. * If known, pass the known value, as this may be more efficient. * @param aDestBreaks: the line breaks you want in the output. * @param aSrcLen: length of the source, in characters. If -1, the source is assumed to be a null- * terminated string. */ static nsresult ConvertStringLineBreaks(nsString& ioString, ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks); /* ConvertLineBreaksInSitu * Convert line breaks in place if possible. NOTE: THIS MAY REALLOCATE THE BUFFER, * BUT IT WON'T FREE THE OLD BUFFER (because it doesn't know how). So be prepared * to keep a copy of the old pointer, and free it if this passes back a new pointer. * ALSO NOTE: DON'T PASS A STATIC STRING POINTER TO THIS FUNCTION. * * @param ioBuffer: the source buffer. if aSrcLen == kIgnoreLen this string is assumed * to be null terminated, otherwise it must be at least aSrcLen long. * @param aSrcBreaks: the line breaks in the source. If unknown, pass eLinebreakAny. * If known, pass the known value, as this may be more efficient. * @param aDestBreaks: the line breaks you want in the output. * @param aSrcLen: length of the source. If -1, the source is assumed to be a null- * terminated string. * @param aOutLen: used to return character length of returned buffer, if not null. */ static nsresult ConvertLineBreaksInSitu(char **ioBuffer, ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen = kIgnoreLen, PRInt32* aOutLen = nsnull); /* ConvertUnicharLineBreaksInSitu * Convert line breaks in place if possible. NOTE: THIS MAY REALLOCATE THE BUFFER, * BUT IT WON'T FREE THE OLD BUFFER (because it doesn't know how). So be prepared * to keep a copy of the old pointer, and free it if this passes back a new pointer. * * @param ioBuffer: the source buffer. if aSrcLen == kIgnoreLen this string is assumed * to be null terminated, otherwise it must be at least aSrcLen long. * @param aSrcBreaks: the line breaks in the source. If unknown, pass eLinebreakAny. * If known, pass the known value, as this may be more efficient. * @param aDestBreaks: the line breaks you want in the output. * @param aSrcLen: length of the source in characters. If -1, the source is assumed to be a null- * terminated string. * @param aOutLen: used to return character length of returned buffer, if not null. */ static nsresult ConvertUnicharLineBreaksInSitu(PRUnichar **ioBuffer, ELinebreakType aSrcBreaks, ELinebreakType aDestBreaks, PRInt32 aSrcLen = kIgnoreLen, PRInt32* aOutLen = nsnull); }; #endif // nsLinebreakConverter_h_