зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
6.0 KiB
C++
123 строки
6.0 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/. */
|
|
|
|
#ifndef nsLinebreakConverter_h_
|
|
#define nsLinebreakConverter_h_
|
|
|
|
#include "nscore.h"
|
|
#include "nsString.h"
|
|
|
|
// utility class for converting between different line breaks.
|
|
|
|
class 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
|
|
|
|
eLinebreakSpace // space characters. Only valid as destination type
|
|
|
|
} ELinebreakType;
|
|
|
|
enum {
|
|
kIgnoreLen = -1
|
|
};
|
|
|
|
/* ConvertLineBreaks
|
|
* Convert line breaks in the supplied string, allocating and returning
|
|
* a new buffer. Returns nullptr 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 = nullptr);
|
|
|
|
|
|
/* ConvertUnicharLineBreaks
|
|
* Convert line breaks in the supplied string, allocating and returning
|
|
* a new buffer. Returns nullptr 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 = nullptr);
|
|
|
|
|
|
/* 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 = nullptr);
|
|
|
|
|
|
/* 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 = nullptr);
|
|
|
|
};
|
|
|
|
#endif // nsLinebreakConverter_h_
|