| 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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| 2 | /* ***** BEGIN LICENSE BLOCK *****
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| 3 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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| 4 | *
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| 5 | * The contents of this file are subject to the Mozilla Public License Version
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| 6 | * 1.1 (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | * http://www.mozilla.org/MPL/
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| 9 | *
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| 10 | * Software distributed under the License is distributed on an "AS IS" basis,
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| 11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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| 12 | * for the specific language governing rights and limitations under the
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| 13 | * License.
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| 14 | *
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| 15 | * The Original Code is mozilla.org code.
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| 16 | *
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| 17 | * The Initial Developer of the Original Code is
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| 18 | * Netscape Communications Corporation.
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| 19 | * Portions created by the Initial Developer are Copyright (C) 2000
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| 20 | * the Initial Developer. All Rights Reserved.
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| 21 | *
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| 22 | * Contributor(s):
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| 23 | * Scott Collins <[email protected]> (original author)
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| 24 | * Johnny Stenbeck <[email protected]>
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| 25 | *
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| 26 | * Alternatively, the contents of this file may be used under the terms of
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| 27 | * either of the GNU General Public License Version 2 or later (the "GPL"),
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| 28 | * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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| 29 | * in which case the provisions of the GPL or the LGPL are applicable instead
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| 30 | * of those above. If you wish to allow use of your version of this file only
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| 31 | * under the terms of either the GPL or the LGPL, and not to allow others to
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| 32 | * use your version of this file under the terms of the MPL, indicate your
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| 33 | * decision by deleting the provisions above and replace them with the notice
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| 34 | * and other provisions required by the GPL or the LGPL. If you do not delete
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| 35 | * the provisions above, a recipient may use your version of this file under
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| 36 | * the terms of any one of the MPL, the GPL or the LGPL.
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| 37 | *
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| 38 | * ***** END LICENSE BLOCK ***** */
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| 39 |
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| 40 | #ifndef nsReadableUtils_h___
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| 41 | #define nsReadableUtils_h___
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| 42 |
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| 43 | /**
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| 44 | * I guess all the routines in this file are all mis-named.
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| 45 | * According to our conventions, they should be |NS_xxx|.
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| 46 | */
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| 47 |
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| 48 | #ifndef nsAString_h___
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| 49 | #include "nsAString.h"
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| 50 | #endif
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| 51 |
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| 52 | inline size_t Distance( const nsReadingIterator<PRUnichar>& start, const nsReadingIterator<PRUnichar>& end )
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| 53 | {
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| 54 | return end.get() - start.get();
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| 55 | }
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| 56 | inline size_t Distance( const nsReadingIterator<char>& start, const nsReadingIterator<char>& end )
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| 57 | {
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| 58 | return end.get() - start.get();
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| 59 | }
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| 60 |
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| 61 | NS_COM void LossyCopyUTF16toASCII( const nsAString& aSource, nsACString& aDest );
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| 62 | NS_COM void CopyASCIItoUTF16( const nsACString& aSource, nsAString& aDest );
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| 63 |
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| 64 | NS_COM void LossyCopyUTF16toASCII( const PRUnichar* aSource, nsACString& aDest );
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| 65 | NS_COM void CopyASCIItoUTF16( const char* aSource, nsAString& aDest );
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| 66 |
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| 67 | NS_COM void CopyUTF16toUTF8( const nsAString& aSource, nsACString& aDest );
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| 68 | NS_COM void CopyUTF8toUTF16( const nsACString& aSource, nsAString& aDest );
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| 69 |
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| 70 | NS_COM void CopyUTF16toUTF8( const PRUnichar* aSource, nsACString& aDest );
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| 71 | NS_COM void CopyUTF8toUTF16( const char* aSource, nsAString& aDest );
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| 72 |
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| 73 | NS_COM void LossyAppendUTF16toASCII( const nsAString& aSource, nsACString& aDest );
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| 74 | NS_COM void AppendASCIItoUTF16( const nsACString& aSource, nsAString& aDest );
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| 75 |
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| 76 | NS_COM void LossyAppendUTF16toASCII( const PRUnichar* aSource, nsACString& aDest );
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| 77 | NS_COM void AppendASCIItoUTF16( const char* aSource, nsAString& aDest );
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| 78 |
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| 79 | NS_COM void AppendUTF16toUTF8( const nsAString& aSource, nsACString& aDest );
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| 80 | NS_COM void AppendUTF8toUTF16( const nsACString& aSource, nsAString& aDest );
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| 81 |
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| 82 | NS_COM void AppendUTF16toUTF8( const PRUnichar* aSource, nsACString& aDest );
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| 83 | NS_COM void AppendUTF8toUTF16( const char* aSource, nsAString& aDest );
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| 84 |
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| 85 | // Backward compatibility
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| 86 | inline
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| 87 | NS_COM void CopyUCS2toASCII( const nsAString& aSource, nsACString& aDest )
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| 88 | { LossyCopyUTF16toASCII(aSource, aDest); }
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| 89 | inline
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| 90 | NS_COM void CopyASCIItoUCS2( const nsACString& aSource, nsAString& aDest )
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| 91 | { CopyASCIItoUTF16(aSource, aDest); }
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| 92 |
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| 93 | /**
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| 94 | * Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
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| 95 | *
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| 96 | * Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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| 97 | * Performs a lossy encoding conversion by chopping 16-bit wide characters down to 8-bits wide while copying |aSource| to your new buffer.
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| 98 | * This conversion is not well defined; but it reproduces legacy string behavior.
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| 99 | * The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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| 100 | *
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| 101 | * @param aSource a 16-bit wide string
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| 102 | * @return a new |char| buffer you must free with |nsMemory::Free|.
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| 103 | */
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| 104 | NS_COM char* ToNewCString( const nsAString& aSource );
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| 105 |
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| 106 |
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| 107 | /**
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| 108 | * Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
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| 109 | *
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| 110 | * Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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| 111 | * The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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| 112 | *
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| 113 | * @param aSource an 8-bit wide string
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| 114 | * @return a new |char| buffer you must free with |nsMemory::Free|.
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| 115 | */
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| 116 | NS_COM char* ToNewCString( const nsACString& aSource );
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| 117 |
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| 118 | /**
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| 119 | * Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
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| 120 | *
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| 121 | * Allocates and returns a new |char| buffer which you must free with
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| 122 | * |nsMemory::Free|.
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| 123 | * Performs an encoding conversion from a UTF-16 string to a UTF-8 string
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| 124 | * copying |aSource| to your new buffer.
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| 125 | * The new buffer is zero-terminated, but that may not help you if |aSource|
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| 126 | * contains embedded nulls.
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| 127 | *
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| 128 | * @param aSource a UTF-16 string (made of PRUnichar's)
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| 129 | * @param aUTF8Count the number of 8-bit units that was returned
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| 130 | * @return a new |char| buffer you must free with |nsMemory::Free|.
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| 131 | */
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| 132 |
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| 133 | NS_COM char* ToNewUTF8String( const nsAString& aSource, PRUint32 *aUTF8Count = nsnull );
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| 134 |
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| 135 |
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| 136 | /**
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| 137 | * Returns a new |PRUnichar| buffer containing a zero-terminated copy of
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| 138 | * |aSource|.
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| 139 | *
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| 140 | * Allocates and returns a new |PRUnichar| buffer which you must free with
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| 141 | * |nsMemory::Free|.
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| 142 | * The new buffer is zero-terminated, but that may not help you if |aSource|
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| 143 | * contains embedded nulls.
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| 144 | *
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| 145 | * @param aSource a UTF-16 string
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| 146 | * @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
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| 147 | */
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| 148 | NS_COM PRUnichar* ToNewUnicode( const nsAString& aSource );
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| 149 |
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| 150 |
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| 151 | /**
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| 152 | * Returns a new |PRUnichar| buffer containing a zero-terminated copy of |aSource|.
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| 153 | *
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| 154 | * Allocates and returns a new |PRUnichar| buffer which you must free with |nsMemory::Free|.
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| 155 | * Performs an encoding conversion by 0-padding 8-bit wide characters up to 16-bits wide while copying |aSource| to your new buffer.
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| 156 | * This conversion is not well defined; but it reproduces legacy string behavior.
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| 157 | * The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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| 158 | *
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| 159 | * @param aSource an 8-bit wide string (a C-string, NOT UTF-8)
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| 160 | * @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
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| 161 | */
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| 162 | NS_COM PRUnichar* ToNewUnicode( const nsACString& aSource );
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| 163 |
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| 164 | /**
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| 165 | * Returns a new |PRUnichar| buffer containing a zero-terminated copy
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| 166 | * of |aSource|.
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| 167 | *
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| 168 | * Allocates and returns a new |char| buffer which you must free with
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| 169 | * |nsMemory::Free|. Performs an encoding conversion from UTF-8 to UTF-16
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| 170 | * while copying |aSource| to your new buffer. This conversion is well defined
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| 171 | * for a valid UTF-8 string. The new buffer is zero-terminated, but that
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| 172 | * may not help you if |aSource| contains embedded nulls.
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| 173 | *
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| 174 | * @param aSource an 8-bit wide string, UTF-8 encoded
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| 175 | * @param aUTF16Count the number of 16-bit units that was returned
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| 176 | * @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
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| 177 | * (UTF-16 encoded)
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| 178 | */
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| 179 | NS_COM PRUnichar* UTF8ToNewUnicode( const nsACString& aSource, PRUint32 *aUTF16Count = nsnull );
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| 180 |
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| 181 | /**
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| 182 | * Copies |aLength| 16-bit code units from the start of |aSource| to the
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| 183 | * |PRUnichar| buffer |aDest|.
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| 184 | *
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| 185 | * After this operation |aDest| is not null terminated.
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| 186 | *
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| 187 | * @param aSource a UTF-16 string
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| 188 | * @param aSrcOffset start offset in the source string
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| 189 | * @param aDest a |PRUnichar| buffer
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| 190 | * @param aLength the number of 16-bit code units to copy
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| 191 | * @return pointer to destination buffer - identical to |aDest|
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| 192 | */
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| 193 | NS_COM PRUnichar* CopyUnicodeTo( const nsAString& aSource,
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| 194 | PRUint32 aSrcOffset,
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| 195 | PRUnichar* aDest,
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| 196 | PRUint32 aLength );
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| 197 |
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| 198 |
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| 199 | /**
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| 200 | * Copies 16-bit characters between iterators |aSrcStart| and
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| 201 | * |aSrcEnd| to the writable string |aDest|. Similar to the
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| 202 | * |nsString::Mid| method.
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| 203 | *
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| 204 | * After this operation |aDest| is not null terminated.
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| 205 | *
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| 206 | * @param aSrcStart start source iterator
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| 207 | * @param aSrcEnd end source iterator
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| 208 | * @param aDest destination for the copy
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| 209 | */
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| 210 | NS_COM void CopyUnicodeTo( const nsAString::const_iterator& aSrcStart,
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| 211 | const nsAString::const_iterator& aSrcEnd,
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| 212 | nsAString& aDest );
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| 213 |
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| 214 | /**
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| 215 | * Appends 16-bit characters between iterators |aSrcStart| and
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| 216 | * |aSrcEnd| to the writable string |aDest|.
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| 217 | *
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| 218 | * After this operation |aDest| is not null terminated.
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| 219 | *
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| 220 | * @param aSrcStart start source iterator
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| 221 | * @param aSrcEnd end source iterator
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| 222 | * @param aDest destination for the copy
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| 223 | */
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| 224 | NS_COM void AppendUnicodeTo( const nsAString::const_iterator& aSrcStart,
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| 225 | const nsAString::const_iterator& aSrcEnd,
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| 226 | nsAString& aDest );
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| 227 |
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| 228 | /**
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| 229 | * Returns |PR_TRUE| if |aString| contains only ASCII characters, that is, characters in the range (0x00, 0x7F).
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| 230 | *
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| 231 | * @param aString a 16-bit wide string to scan
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| 232 | */
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| 233 | NS_COM PRBool IsASCII( const nsAString& aString );
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| 234 |
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| 235 | /**
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| 236 | * Returns |PR_TRUE| if |aString| contains only ASCII characters, that is, characters in the range (0x00, 0x7F).
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| 237 | *
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| 238 | * @param aString a 8-bit wide string to scan
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| 239 | */
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| 240 | NS_COM PRBool IsASCII( const nsACString& aString );
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| 241 |
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| 242 |
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| 243 | /**
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| 244 | * Returns |PR_TRUE| if |aString| is a valid UTF-8 string.
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| 245 | * XXX This is not bullet-proof and nor an all-purpose UTF-8 validator.
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| 246 | * It is mainly written to replace and roughly equivalent to
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| 247 | *
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| 248 | * str.Equals(NS_ConvertUTF16toUTF8(NS_ConvertUTF8toUTF16(str)))
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| 249 | *
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| 250 | * (see bug 191541)
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| 251 | * As such, it does not check for non-UTF-8 7bit encodings such as
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| 252 | * ISO-2022-JP and HZ. However, it filters out UTF-8 representation
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| 253 | * of surrogate codepoints and non-characters ( 0xFFFE and 0xFFFF
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| 254 | * in planes 0 through 16.) as well as overlong UTF-8 sequences.
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| 255 | * Also note that it regards UTF-8 sequences corresponding to
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| 256 | * codepoints above 0x10FFFF as invalid in accordance with
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| 257 | * http://www.ietf.org/internet-drafts/draft-yergeau-rfc2279bis-04.txt
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| 258 | *
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| 259 | * @param aString an 8-bit wide string to scan
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| 260 | */
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| 261 | NS_COM PRBool IsUTF8( const nsACString& aString );
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| 262 |
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| 263 |
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| 264 | /**
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| 265 | * Converts case in place in the argument string.
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| 266 | */
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| 267 | NS_COM void ToUpperCase( nsACString& );
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| 268 |
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| 269 | NS_COM void ToLowerCase( nsACString& );
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| 270 |
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| 271 | NS_COM void ToUpperCase( nsCSubstring& );
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| 272 |
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| 273 | NS_COM void ToLowerCase( nsCSubstring& );
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| 274 |
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| 275 | /**
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| 276 | * Converts case from string aSource to aDest.
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| 277 | */
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| 278 | NS_COM void ToUpperCase( const nsACString& aSource, nsACString& aDest );
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| 279 |
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| 280 | NS_COM void ToLowerCase( const nsACString& aSource, nsACString& aDest );
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| 281 |
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| 282 | /**
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| 283 | * Finds the leftmost occurance of |aPattern|, if any in the range |aSearchStart|..|aSearchEnd|.
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| 284 | *
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| 285 | * Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
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| 286 | * point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
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| 287 | *
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| 288 | * Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
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| 289 | * If we need something faster, then we can implement that later.
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| 290 | */
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| 291 |
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| 292 | NS_COM PRBool FindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator&, const nsStringComparator& = nsDefaultStringComparator() );
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| 293 | NS_COM PRBool FindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator&, const nsCStringComparator& = nsDefaultCStringComparator() );
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| 294 |
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| 295 | /* sometimes we don't care about where the string was, just that we
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| 296 | * found it or not */
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| 297 | inline PRBool FindInReadable( const nsAString& aPattern, const nsAString& aSource, const nsStringComparator& compare = nsDefaultStringComparator() )
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| 298 | {
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| 299 | nsAString::const_iterator start, end;
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| 300 | aSource.BeginReading(start);
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| 301 | aSource.EndReading(end);
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| 302 | return FindInReadable(aPattern, start, end, compare);
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| 303 | }
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| 304 |
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| 305 | inline PRBool FindInReadable( const nsACString& aPattern, const nsACString& aSource, const nsCStringComparator& compare = nsDefaultCStringComparator() )
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| 306 | {
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| 307 | nsACString::const_iterator start, end;
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| 308 | aSource.BeginReading(start);
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| 309 | aSource.EndReading(end);
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| 310 | return FindInReadable(aPattern, start, end, compare);
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| 311 | }
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| 312 |
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| 313 |
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| 314 | NS_COM PRBool CaseInsensitiveFindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator& );
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| 315 |
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| 316 | /**
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| 317 | * Finds the rightmost occurance of |aPattern|
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| 318 | * Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
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| 319 | * point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
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| 320 | *
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| 321 | * Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
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| 322 | * If we need something faster, then we can implement that later.
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| 323 | */
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| 324 | NS_COM PRBool RFindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator&, const nsStringComparator& = nsDefaultStringComparator() );
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| 325 | NS_COM PRBool RFindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator&, const nsCStringComparator& = nsDefaultCStringComparator() );
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| 326 |
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| 327 | /**
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| 328 | * Finds the leftmost occurance of |aChar|, if any in the range
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| 329 | * |aSearchStart|..|aSearchEnd|.
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| 330 | *
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| 331 | * Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| to
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| 332 | * point to the match. If no match was found, returns |PR_FALSE| and
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| 333 | * makes |aSearchStart == aSearchEnd|.
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| 334 | */
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| 335 | NS_COM PRBool FindCharInReadable( PRUnichar aChar, nsAString::const_iterator& aSearchStart, const nsAString::const_iterator& aSearchEnd );
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| 336 | NS_COM PRBool FindCharInReadable( char aChar, nsACString::const_iterator& aSearchStart, const nsACString::const_iterator& aSearchEnd );
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| 337 |
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| 338 | /**
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| 339 | * Finds the number of occurences of |aChar| in the string |aStr|
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| 340 | */
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| 341 | NS_COM PRUint32 CountCharInReadable( const nsAString& aStr,
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| 342 | PRUnichar aChar );
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| 343 | NS_COM PRUint32 CountCharInReadable( const nsACString& aStr,
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| 344 | char aChar );
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| 345 |
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| 346 | NS_COM PRBool
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| 347 | StringBeginsWith( const nsAString& aSource, const nsAString& aSubstring,
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| 348 | const nsStringComparator& aComparator =
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| 349 | nsDefaultStringComparator() );
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| 350 | NS_COM PRBool
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|---|
| 351 | StringBeginsWith( const nsACString& aSource, const nsACString& aSubstring,
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|---|
| 352 | const nsCStringComparator& aComparator =
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|---|
| 353 | nsDefaultCStringComparator() );
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|---|
| 354 | NS_COM PRBool
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|---|
| 355 | StringEndsWith( const nsAString& aSource, const nsAString& aSubstring,
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|---|
| 356 | const nsStringComparator& aComparator =
|
|---|
| 357 | nsDefaultStringComparator() );
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|---|
| 358 | NS_COM PRBool
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|---|
| 359 | StringEndsWith( const nsACString& aSource, const nsACString& aSubstring,
|
|---|
| 360 | const nsCStringComparator& aComparator =
|
|---|
| 361 | nsDefaultCStringComparator() );
|
|---|
| 362 |
|
|---|
| 363 | NS_COM PRUint32 HashString( const nsAString& aStr );
|
|---|
| 364 | NS_COM PRUint32 HashString( const nsACString& aStr );
|
|---|
| 365 |
|
|---|
| 366 | NS_COM const nsAFlatString& EmptyString();
|
|---|
| 367 | NS_COM const nsAFlatCString& EmptyCString();
|
|---|
| 368 |
|
|---|
| 369 |
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|---|
| 370 | #endif // !defined(nsReadableUtils_h___)
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