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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) 2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Scott Collins <scc@mozilla.org> (original author)
+ * Johnny Stenbeck <jst@netscape.com>
+ *
+ * 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 ***** */
+
+#ifndef nsReadableUtils_h___
+#define nsReadableUtils_h___
+
+ /**
+ * I guess all the routines in this file are all mis-named.
+ * According to our conventions, they should be |NS_xxx|.
+ */
+
+#ifndef nsAString_h___
+#include "nsAString.h"
+#endif
+
+inline size_t Distance( const nsReadingIterator<PRUnichar>& start, const nsReadingIterator<PRUnichar>& end )
+ {
+ return end.get() - start.get();
+ }
+inline size_t Distance( const nsReadingIterator<char>& start, const nsReadingIterator<char>& end )
+ {
+ return end.get() - start.get();
+ }
+
+NS_COM void LossyCopyUTF16toASCII( const nsAString& aSource, nsACString& aDest );
+NS_COM void CopyASCIItoUTF16( const nsACString& aSource, nsAString& aDest );
+
+NS_COM void LossyCopyUTF16toASCII( const PRUnichar* aSource, nsACString& aDest );
+NS_COM void CopyASCIItoUTF16( const char* aSource, nsAString& aDest );
+
+NS_COM void CopyUTF16toUTF8( const nsAString& aSource, nsACString& aDest );
+NS_COM void CopyUTF8toUTF16( const nsACString& aSource, nsAString& aDest );
+
+NS_COM void CopyUTF16toUTF8( const PRUnichar* aSource, nsACString& aDest );
+NS_COM void CopyUTF8toUTF16( const char* aSource, nsAString& aDest );
+
+NS_COM void LossyAppendUTF16toASCII( const nsAString& aSource, nsACString& aDest );
+NS_COM void AppendASCIItoUTF16( const nsACString& aSource, nsAString& aDest );
+
+NS_COM void LossyAppendUTF16toASCII( const PRUnichar* aSource, nsACString& aDest );
+NS_COM void AppendASCIItoUTF16( const char* aSource, nsAString& aDest );
+
+NS_COM void AppendUTF16toUTF8( const nsAString& aSource, nsACString& aDest );
+NS_COM void AppendUTF8toUTF16( const nsACString& aSource, nsAString& aDest );
+
+NS_COM void AppendUTF16toUTF8( const PRUnichar* aSource, nsACString& aDest );
+NS_COM void AppendUTF8toUTF16( const char* aSource, nsAString& aDest );
+
+// Backward compatibility
+inline
+NS_COM void CopyUCS2toASCII( const nsAString& aSource, nsACString& aDest )
+{ LossyCopyUTF16toASCII(aSource, aDest); }
+inline
+NS_COM void CopyASCIItoUCS2( const nsACString& aSource, nsAString& aDest )
+{ CopyASCIItoUTF16(aSource, aDest); }
+
+ /**
+ * Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
+ *
+ * Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
+ * Performs a lossy encoding conversion by chopping 16-bit wide characters down to 8-bits wide while copying |aSource| to your new buffer.
+ * This conversion is not well defined; but it reproduces legacy string behavior.
+ * The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
+ *
+ * @param aSource a 16-bit wide string
+ * @return a new |char| buffer you must free with |nsMemory::Free|.
+ */
+NS_COM char* ToNewCString( const nsAString& aSource );
+
+
+ /**
+ * Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
+ *
+ * Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
+ * The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
+ *
+ * @param aSource an 8-bit wide string
+ * @return a new |char| buffer you must free with |nsMemory::Free|.
+ */
+NS_COM char* ToNewCString( const nsACString& aSource );
+
+ /**
+ * Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
+ *
+ * Allocates and returns a new |char| buffer which you must free with
+ * |nsMemory::Free|.
+ * Performs an encoding conversion from a UTF-16 string to a UTF-8 string
+ * copying |aSource| to your new buffer.
+ * The new buffer is zero-terminated, but that may not help you if |aSource|
+ * contains embedded nulls.
+ *
+ * @param aSource a UTF-16 string (made of PRUnichar's)
+ * @param aUTF8Count the number of 8-bit units that was returned
+ * @return a new |char| buffer you must free with |nsMemory::Free|.
+ */
+
+NS_COM char* ToNewUTF8String( const nsAString& aSource, PRUint32 *aUTF8Count = nsnull );
+
+
+ /**
+ * Returns a new |PRUnichar| buffer containing a zero-terminated copy of
+ * |aSource|.
+ *
+ * Allocates and returns a new |PRUnichar| buffer which you must free with
+ * |nsMemory::Free|.
+ * The new buffer is zero-terminated, but that may not help you if |aSource|
+ * contains embedded nulls.
+ *
+ * @param aSource a UTF-16 string
+ * @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
+ */
+NS_COM PRUnichar* ToNewUnicode( const nsAString& aSource );
+
+
+ /**
+ * Returns a new |PRUnichar| buffer containing a zero-terminated copy of |aSource|.
+ *
+ * Allocates and returns a new |PRUnichar| buffer which you must free with |nsMemory::Free|.
+ * Performs an encoding conversion by 0-padding 8-bit wide characters up to 16-bits wide while copying |aSource| to your new buffer.
+ * This conversion is not well defined; but it reproduces legacy string behavior.
+ * The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
+ *
+ * @param aSource an 8-bit wide string (a C-string, NOT UTF-8)
+ * @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
+ */
+NS_COM PRUnichar* ToNewUnicode( const nsACString& aSource );
+
+ /**
+ * Returns a new |PRUnichar| buffer containing a zero-terminated copy
+ * of |aSource|.
+ *
+ * Allocates and returns a new |char| buffer which you must free with
+ * |nsMemory::Free|. Performs an encoding conversion from UTF-8 to UTF-16
+ * while copying |aSource| to your new buffer. This conversion is well defined
+ * for a valid UTF-8 string. The new buffer is zero-terminated, but that
+ * may not help you if |aSource| contains embedded nulls.
+ *
+ * @param aSource an 8-bit wide string, UTF-8 encoded
+ * @param aUTF16Count the number of 16-bit units that was returned
+ * @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
+ * (UTF-16 encoded)
+ */
+NS_COM PRUnichar* UTF8ToNewUnicode( const nsACString& aSource, PRUint32 *aUTF16Count = nsnull );
+
+ /**
+ * Copies |aLength| 16-bit code units from the start of |aSource| to the
+ * |PRUnichar| buffer |aDest|.
+ *
+ * After this operation |aDest| is not null terminated.
+ *
+ * @param aSource a UTF-16 string
+ * @param aSrcOffset start offset in the source string
+ * @param aDest a |PRUnichar| buffer
+ * @param aLength the number of 16-bit code units to copy
+ * @return pointer to destination buffer - identical to |aDest|
+ */
+NS_COM PRUnichar* CopyUnicodeTo( const nsAString& aSource,
+ PRUint32 aSrcOffset,
+ PRUnichar* aDest,
+ PRUint32 aLength );
+
+
+ /**
+ * Copies 16-bit characters between iterators |aSrcStart| and
+ * |aSrcEnd| to the writable string |aDest|. Similar to the
+ * |nsString::Mid| method.
+ *
+ * After this operation |aDest| is not null terminated.
+ *
+ * @param aSrcStart start source iterator
+ * @param aSrcEnd end source iterator
+ * @param aDest destination for the copy
+ */
+NS_COM void CopyUnicodeTo( const nsAString::const_iterator& aSrcStart,
+ const nsAString::const_iterator& aSrcEnd,
+ nsAString& aDest );
+
+ /**
+ * Appends 16-bit characters between iterators |aSrcStart| and
+ * |aSrcEnd| to the writable string |aDest|.
+ *
+ * After this operation |aDest| is not null terminated.
+ *
+ * @param aSrcStart start source iterator
+ * @param aSrcEnd end source iterator
+ * @param aDest destination for the copy
+ */
+NS_COM void AppendUnicodeTo( const nsAString::const_iterator& aSrcStart,
+ const nsAString::const_iterator& aSrcEnd,
+ nsAString& aDest );
+
+ /**
+ * Returns |PR_TRUE| if |aString| contains only ASCII characters, that is, characters in the range (0x00, 0x7F).
+ *
+ * @param aString a 16-bit wide string to scan
+ */
+NS_COM PRBool IsASCII( const nsAString& aString );
+
+ /**
+ * Returns |PR_TRUE| if |aString| contains only ASCII characters, that is, characters in the range (0x00, 0x7F).
+ *
+ * @param aString a 8-bit wide string to scan
+ */
+NS_COM PRBool IsASCII( const nsACString& aString );
+
+
+ /**
+ * Returns |PR_TRUE| if |aString| is a valid UTF-8 string.
+ * XXX This is not bullet-proof and nor an all-purpose UTF-8 validator.
+ * It is mainly written to replace and roughly equivalent to
+ *
+ * str.Equals(NS_ConvertUTF16toUTF8(NS_ConvertUTF8toUTF16(str)))
+ *
+ * (see bug 191541)
+ * As such, it does not check for non-UTF-8 7bit encodings such as
+ * ISO-2022-JP and HZ. However, it filters out UTF-8 representation
+ * of surrogate codepoints and non-characters ( 0xFFFE and 0xFFFF
+ * in planes 0 through 16.) as well as overlong UTF-8 sequences.
+ * Also note that it regards UTF-8 sequences corresponding to
+ * codepoints above 0x10FFFF as invalid in accordance with
+ * http://www.ietf.org/internet-drafts/draft-yergeau-rfc2279bis-04.txt
+ *
+ * @param aString an 8-bit wide string to scan
+ */
+NS_COM PRBool IsUTF8( const nsACString& aString );
+
+
+ /**
+ * Converts case in place in the argument string.
+ */
+NS_COM void ToUpperCase( nsACString& );
+
+NS_COM void ToLowerCase( nsACString& );
+
+NS_COM void ToUpperCase( nsCSubstring& );
+
+NS_COM void ToLowerCase( nsCSubstring& );
+
+ /**
+ * Converts case from string aSource to aDest.
+ */
+NS_COM void ToUpperCase( const nsACString& aSource, nsACString& aDest );
+
+NS_COM void ToLowerCase( const nsACString& aSource, nsACString& aDest );
+
+ /**
+ * Finds the leftmost occurance of |aPattern|, if any in the range |aSearchStart|..|aSearchEnd|.
+ *
+ * Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
+ * point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
+ *
+ * Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
+ * If we need something faster, then we can implement that later.
+ */
+
+NS_COM PRBool FindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator&, const nsStringComparator& = nsDefaultStringComparator() );
+NS_COM PRBool FindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator&, const nsCStringComparator& = nsDefaultCStringComparator() );
+
+/* sometimes we don't care about where the string was, just that we
+ * found it or not */
+inline PRBool FindInReadable( const nsAString& aPattern, const nsAString& aSource, const nsStringComparator& compare = nsDefaultStringComparator() )
+{
+ nsAString::const_iterator start, end;
+ aSource.BeginReading(start);
+ aSource.EndReading(end);
+ return FindInReadable(aPattern, start, end, compare);
+}
+
+inline PRBool FindInReadable( const nsACString& aPattern, const nsACString& aSource, const nsCStringComparator& compare = nsDefaultCStringComparator() )
+{
+ nsACString::const_iterator start, end;
+ aSource.BeginReading(start);
+ aSource.EndReading(end);
+ return FindInReadable(aPattern, start, end, compare);
+}
+
+
+NS_COM PRBool CaseInsensitiveFindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator& );
+
+ /**
+ * Finds the rightmost occurance of |aPattern|
+ * Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
+ * point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
+ *
+ * Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
+ * If we need something faster, then we can implement that later.
+ */
+NS_COM PRBool RFindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator&, const nsStringComparator& = nsDefaultStringComparator() );
+NS_COM PRBool RFindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator&, const nsCStringComparator& = nsDefaultCStringComparator() );
+
+ /**
+ * Finds the leftmost occurance of |aChar|, if any in the range
+ * |aSearchStart|..|aSearchEnd|.
+ *
+ * Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| to
+ * point to the match. If no match was found, returns |PR_FALSE| and
+ * makes |aSearchStart == aSearchEnd|.
+ */
+NS_COM PRBool FindCharInReadable( PRUnichar aChar, nsAString::const_iterator& aSearchStart, const nsAString::const_iterator& aSearchEnd );
+NS_COM PRBool FindCharInReadable( char aChar, nsACString::const_iterator& aSearchStart, const nsACString::const_iterator& aSearchEnd );
+
+ /**
+ * Finds the number of occurences of |aChar| in the string |aStr|
+ */
+NS_COM PRUint32 CountCharInReadable( const nsAString& aStr,
+ PRUnichar aChar );
+NS_COM PRUint32 CountCharInReadable( const nsACString& aStr,
+ char aChar );
+
+NS_COM PRBool
+StringBeginsWith( const nsAString& aSource, const nsAString& aSubstring,
+ const nsStringComparator& aComparator =
+ nsDefaultStringComparator() );
+NS_COM PRBool
+StringBeginsWith( const nsACString& aSource, const nsACString& aSubstring,
+ const nsCStringComparator& aComparator =
+ nsDefaultCStringComparator() );
+NS_COM PRBool
+StringEndsWith( const nsAString& aSource, const nsAString& aSubstring,
+ const nsStringComparator& aComparator =
+ nsDefaultStringComparator() );
+NS_COM PRBool
+StringEndsWith( const nsACString& aSource, const nsACString& aSubstring,
+ const nsCStringComparator& aComparator =
+ nsDefaultCStringComparator() );
+
+NS_COM PRUint32 HashString( const nsAString& aStr );
+NS_COM PRUint32 HashString( const nsACString& aStr );
+
+NS_COM const nsAFlatString& EmptyString();
+NS_COM const nsAFlatCString& EmptyCString();
+
+
+#endif // !defined(nsReadableUtils_h___)
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