/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* 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/. */
// utility class for converting between different line breaks.
class nsLinebreakConverter { public: // Note: enum must match char* array in GetLinebreakString typedefenum {
eLinebreakAny, // any kind of linebreak (i.e. "don't care" source)
eLinebreakPlatform, // platform linebreak
eLinebreakContent, // Content model linebreak (LF)
eLinebreakNet, // Form submission linebreak (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.
*/ staticchar* ConvertLineBreaks(constchar* aSrc, ELinebreakType aSrcBreaks,
ELinebreakType aDestBreaks,
int32_t aSrcLen = kIgnoreLen,
int32_t* 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 char16_t* ConvertUnicharLineBreaks(const char16_t* aSrc,
ELinebreakType aSrcBreaks,
ELinebreakType aDestBreaks,
int32_t aSrcLen = kIgnoreLen,
int32_t* 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& aIoString,
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** aIoBuffer,
ELinebreakType aSrcBreaks,
ELinebreakType aDestBreaks,
int32_t aSrcLen = kIgnoreLen,
int32_t* 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(char16_t** aIoBuffer,
ELinebreakType aSrcBreaks,
ELinebreakType aDestBreaks,
int32_t aSrcLen = kIgnoreLen,
int32_t* aOutLen = nullptr);
};
#endif// nsLinebreakConverter_h_
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