mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
721 lines
24 KiB
C++
721 lines
24 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// IWYU pragma: private, include "nsString.h"
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/**
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* This is the canonical null-terminated string class. All subclasses
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* promise null-terminated storage. Instances of this class allocate
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* strings on the heap.
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*
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* NAMES:
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* nsString for wide characters
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* nsCString for narrow characters
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*
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* This class is also known as nsAFlat[C]String, where "flat" is used
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* to denote a null-terminated string.
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*/
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class nsTString_CharT : public nsTSubstring_CharT
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{
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public:
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typedef nsTString_CharT self_type;
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public:
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/**
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* constructors
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*/
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nsTString_CharT()
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: substring_type() {}
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explicit
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nsTString_CharT( const char_type* data, size_type length = size_type(-1) )
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: substring_type()
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{
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Assign(data, length);
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}
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#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
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explicit
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nsTString_CharT( char16ptr_t data, size_type length = size_type(-1) )
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: substring_type()
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{
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Assign(static_cast<const char16_t*>(data), length);
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}
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#endif
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nsTString_CharT( const self_type& str )
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: substring_type()
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{
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Assign(str);
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}
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nsTString_CharT( const substring_tuple_type& tuple )
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: substring_type()
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{
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Assign(tuple);
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}
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explicit
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nsTString_CharT( const substring_type& readable )
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: substring_type()
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{
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Assign(readable);
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}
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// |operator=| does not inherit, so we must define our own
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self_type& operator=( char_type c ) { Assign(c); return *this; }
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self_type& operator=( const char_type* data ) { Assign(data); return *this; }
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self_type& operator=( const self_type& str ) { Assign(str); return *this; }
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#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
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self_type& operator=( const char16ptr_t data ) { Assign(static_cast<const char16_t*>(data)); return *this; }
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#endif
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self_type& operator=( const substring_type& str ) { Assign(str); return *this; }
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self_type& operator=( const substring_tuple_type& tuple ) { Assign(tuple); return *this; }
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/**
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* returns the null-terminated string
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*/
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#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
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char16ptr_t get() const
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#else
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const char_type* get() const
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#endif
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{
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return mData;
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}
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/**
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* returns character at specified index.
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*
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* NOTE: unlike nsTSubstring::CharAt, this function allows you to index
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* the null terminator character.
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*/
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char_type CharAt( index_type i ) const
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{
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NS_ASSERTION(i <= mLength, "index exceeds allowable range");
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return mData[i];
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}
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char_type operator[]( index_type i ) const
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{
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return CharAt(i);
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}
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#if MOZ_STRING_WITH_OBSOLETE_API
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/**
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* Search for the given substring within this string.
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*
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* @param aString is substring to be sought in this
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* @param aIgnoreCase selects case sensitivity
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* @param aOffset tells us where in this string to start searching
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* @param aCount tells us how far from the offset we are to search. Use
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* -1 to search the whole string.
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* @return offset in string, or kNotFound
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*/
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int32_t Find( const nsCString& aString, bool aIgnoreCase=false, int32_t aOffset=0, int32_t aCount=-1 ) const;
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int32_t Find( const char* aString, bool aIgnoreCase=false, int32_t aOffset=0, int32_t aCount=-1 ) const;
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#ifdef CharT_is_PRUnichar
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int32_t Find( const nsAFlatString& aString, int32_t aOffset=0, int32_t aCount=-1 ) const;
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int32_t Find( const PRUnichar* aString, int32_t aOffset=0, int32_t aCount=-1 ) const;
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#ifdef MOZ_USE_CHAR16_WRAPPER
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int32_t Find( char16ptr_t aString, int32_t aOffset=0, int32_t aCount=-1 ) const
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{
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return Find(static_cast<const char16_t*>(aString), aOffset, aCount);
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}
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#endif
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#endif
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/**
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* This methods scans the string backwards, looking for the given string
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*
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* @param aString is substring to be sought in this
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* @param aIgnoreCase tells us whether or not to do caseless compare
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* @param aOffset tells us where in this string to start searching.
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* Use -1 to search from the end of the string.
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* @param aCount tells us how many iterations to make starting at the
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* given offset.
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* @return offset in string, or kNotFound
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*/
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int32_t RFind( const nsCString& aString, bool aIgnoreCase=false, int32_t aOffset=-1, int32_t aCount=-1 ) const;
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int32_t RFind( const char* aCString, bool aIgnoreCase=false, int32_t aOffset=-1, int32_t aCount=-1 ) const;
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#ifdef CharT_is_PRUnichar
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int32_t RFind( const nsAFlatString& aString, int32_t aOffset=-1, int32_t aCount=-1 ) const;
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int32_t RFind( const PRUnichar* aString, int32_t aOffset=-1, int32_t aCount=-1 ) const;
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#endif
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/**
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* Search for given char within this string
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*
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* @param aChar is the character to search for
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* @param aOffset tells us where in this string to start searching
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* @param aCount tells us how far from the offset we are to search.
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* Use -1 to search the whole string.
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* @return offset in string, or kNotFound
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*/
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// int32_t FindChar( PRUnichar aChar, int32_t aOffset=0, int32_t aCount=-1 ) const;
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int32_t RFindChar( PRUnichar aChar, int32_t aOffset=-1, int32_t aCount=-1 ) const;
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/**
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* This method searches this string for the first character found in
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* the given string.
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*
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* @param aString contains set of chars to be found
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* @param aOffset tells us where in this string to start searching
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* (counting from left)
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* @return offset in string, or kNotFound
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*/
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int32_t FindCharInSet( const char* aString, int32_t aOffset=0 ) const;
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int32_t FindCharInSet( const self_type& aString, int32_t aOffset=0 ) const
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{
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return FindCharInSet(aString.get(), aOffset);
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}
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#ifdef CharT_is_PRUnichar
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int32_t FindCharInSet( const PRUnichar* aString, int32_t aOffset=0 ) const;
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#endif
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/**
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* This method searches this string for the last character found in
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* the given string.
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*
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* @param aString contains set of chars to be found
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* @param aOffset tells us where in this string to start searching
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* (counting from left)
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* @return offset in string, or kNotFound
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*/
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int32_t RFindCharInSet( const char_type* aString, int32_t aOffset=-1 ) const;
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int32_t RFindCharInSet( const self_type& aString, int32_t aOffset=-1 ) const
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{
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return RFindCharInSet(aString.get(), aOffset);
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}
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/**
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* Compares a given string to this string.
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*
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* @param aString is the string to be compared
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* @param aIgnoreCase tells us how to treat case
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* @param aCount tells us how many chars to compare
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* @return -1,0,1
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*/
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#ifdef CharT_is_char
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int32_t Compare( const char* aString, bool aIgnoreCase=false, int32_t aCount=-1 ) const;
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#endif
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/**
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* Equality check between given string and this string.
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*
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* @param aString is the string to check
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* @param aIgnoreCase tells us how to treat case
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* @param aCount tells us how many chars to compare
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* @return boolean
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*/
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#ifdef CharT_is_char
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bool EqualsIgnoreCase( const char* aString, int32_t aCount=-1 ) const {
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return Compare(aString, true, aCount) == 0;
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}
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#else
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bool EqualsIgnoreCase( const char* aString, int32_t aCount=-1 ) const;
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#endif // !CharT_is_PRUnichar
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/**
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* Perform string to double-precision float conversion.
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*
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* @param aErrorCode will contain error if one occurs
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* @return double-precision float rep of string value
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*/
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double ToDouble( nsresult* aErrorCode ) const;
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/**
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* Perform string to single-precision float conversion.
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*
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* @param aErrorCode will contain error if one occurs
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* @return single-precision float rep of string value
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*/
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float ToFloat( nsresult* aErrorCode ) const {
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return (float)ToDouble(aErrorCode);
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}
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/**
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* Perform string to int conversion.
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* @param aErrorCode will contain error if one occurs
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* @param aRadix tells us which radix to assume; kAutoDetect tells us to determine the radix for you.
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* @return int rep of string value, and possible (out) error code
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*/
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int32_t ToInteger( nsresult* aErrorCode, uint32_t aRadix=kRadix10 ) const;
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/**
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* Perform string to 64-bit int conversion.
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* @param aErrorCode will contain error if one occurs
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* @param aRadix tells us which radix to assume; kAutoDetect tells us to determine the radix for you.
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* @return 64-bit int rep of string value, and possible (out) error code
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*/
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int64_t ToInteger64( nsresult* aErrorCode, uint32_t aRadix=kRadix10 ) const;
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/**
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* |Left|, |Mid|, and |Right| are annoying signatures that seem better almost
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* any _other_ way than they are now. Consider these alternatives
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*
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* aWritable = aReadable.Left(17); // ...a member function that returns a |Substring|
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* aWritable = Left(aReadable, 17); // ...a global function that returns a |Substring|
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* Left(aReadable, 17, aWritable); // ...a global function that does the assignment
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*
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* as opposed to the current signature
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*
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* aReadable.Left(aWritable, 17); // ...a member function that does the assignment
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*
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* or maybe just stamping them out in favor of |Substring|, they are just duplicate functionality
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*
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* aWritable = Substring(aReadable, 0, 17);
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*/
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size_type Mid( self_type& aResult, uint32_t aStartPos, uint32_t aCount ) const;
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size_type Left( self_type& aResult, size_type aCount ) const
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{
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return Mid(aResult, 0, aCount);
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}
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size_type Right( self_type& aResult, size_type aCount ) const
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{
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aCount = XPCOM_MIN(mLength, aCount);
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return Mid(aResult, mLength - aCount, aCount);
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}
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/**
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* Set a char inside this string at given index
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*
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* @param aChar is the char you want to write into this string
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* @param anIndex is the ofs where you want to write the given char
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* @return TRUE if successful
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*/
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bool SetCharAt( PRUnichar aChar, uint32_t aIndex );
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/**
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* These methods are used to remove all occurrences of the
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* characters found in aSet from this string.
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*
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* @param aSet -- characters to be cut from this
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*/
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void StripChars( const char* aSet );
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/**
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* This method strips whitespace throughout the string.
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*/
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void StripWhitespace();
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/**
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* swaps occurence of 1 string for another
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*/
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void ReplaceChar( char_type aOldChar, char_type aNewChar );
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void ReplaceChar( const char* aSet, char_type aNewChar );
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void ReplaceSubstring( const self_type& aTarget, const self_type& aNewValue);
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void ReplaceSubstring( const char_type* aTarget, const char_type* aNewValue);
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/**
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* This method trims characters found in aTrimSet from
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* either end of the underlying string.
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*
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* @param aSet -- contains chars to be trimmed from both ends
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* @param aEliminateLeading
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* @param aEliminateTrailing
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* @param aIgnoreQuotes -- if true, causes surrounding quotes to be ignored
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* @return this
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*/
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void Trim( const char* aSet, bool aEliminateLeading=true, bool aEliminateTrailing=true, bool aIgnoreQuotes=false );
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/**
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* This method strips whitespace from string.
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* You can control whether whitespace is yanked from start and end of
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* string as well.
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*
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* @param aEliminateLeading controls stripping of leading ws
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* @param aEliminateTrailing controls stripping of trailing ws
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*/
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void CompressWhitespace( bool aEliminateLeading=true, bool aEliminateTrailing=true );
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/**
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* assign/append/insert with _LOSSY_ conversion
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*/
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void AssignWithConversion( const nsTAString_IncompatibleCharT& aString );
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void AssignWithConversion( const incompatible_char_type* aData, int32_t aLength=-1 );
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#endif // !MOZ_STRING_WITH_OBSOLETE_API
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void Rebind( const char_type* data, size_type length );
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/**
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* verify restrictions for dependent strings
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*/
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void AssertValidDepedentString()
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{
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NS_ASSERTION(mData, "nsTDependentString must wrap a non-NULL buffer");
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NS_ASSERTION(mLength != size_type(-1), "nsTDependentString has bogus length");
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NS_ASSERTION(mData[mLength] == 0, "nsTDependentString must wrap only null-terminated strings. You are probably looking for nsTDependentSubstring.");
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}
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protected:
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explicit
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nsTString_CharT( uint32_t flags )
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: substring_type(flags) {}
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// allow subclasses to initialize fields directly
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nsTString_CharT( char_type* data, size_type length, uint32_t flags )
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: substring_type(data, length, flags) {}
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};
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class nsTFixedString_CharT : public nsTString_CharT
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{
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public:
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typedef nsTFixedString_CharT self_type;
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typedef nsTFixedString_CharT fixed_string_type;
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public:
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/**
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* @param data
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* fixed-size buffer to be used by the string (the contents of
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* this buffer may be modified by the string)
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* @param storageSize
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* the size of the fixed buffer
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* @param length (optional)
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* the length of the string already contained in the buffer
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*/
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nsTFixedString_CharT( char_type* data, size_type storageSize )
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: string_type(data, uint32_t(char_traits::length(data)), F_TERMINATED | F_FIXED | F_CLASS_FIXED)
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, mFixedCapacity(storageSize - 1)
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, mFixedBuf(data)
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{}
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nsTFixedString_CharT( char_type* data, size_type storageSize, size_type length )
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: string_type(data, length, F_TERMINATED | F_FIXED | F_CLASS_FIXED)
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, mFixedCapacity(storageSize - 1)
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, mFixedBuf(data)
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{
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// null-terminate
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mFixedBuf[length] = char_type(0);
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}
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// |operator=| does not inherit, so we must define our own
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self_type& operator=( char_type c ) { Assign(c); return *this; }
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self_type& operator=( const char_type* data ) { Assign(data); return *this; }
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self_type& operator=( const substring_type& str ) { Assign(str); return *this; }
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self_type& operator=( const substring_tuple_type& tuple ) { Assign(tuple); return *this; }
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protected:
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friend class nsTSubstring_CharT;
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size_type mFixedCapacity;
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char_type *mFixedBuf;
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};
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/**
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* nsTAutoString_CharT
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*
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* Subclass of nsTString_CharT that adds support for stack-based string
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* allocation. It is normally not a good idea to use this class on the
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* heap, because it will allocate space which may be wasted if the string
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* it contains is significantly smaller or any larger than 64 characters.
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*
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* NAMES:
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* nsAutoString for wide characters
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* nsAutoCString for narrow characters
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*/
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class nsTAutoString_CharT : public nsTFixedString_CharT
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{
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public:
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typedef nsTAutoString_CharT self_type;
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public:
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/**
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* constructors
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*/
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nsTAutoString_CharT()
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: fixed_string_type(mStorage, kDefaultStorageSize, 0)
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{}
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explicit
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nsTAutoString_CharT( char_type c )
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: fixed_string_type(mStorage, kDefaultStorageSize, 0)
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{
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Assign(c);
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}
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explicit
|
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nsTAutoString_CharT( const char_type* data, size_type length = size_type(-1) )
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: fixed_string_type(mStorage, kDefaultStorageSize, 0)
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{
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Assign(data, length);
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}
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|
|
#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
|
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explicit
|
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nsTAutoString_CharT( char16ptr_t data, size_type length = size_type(-1) )
|
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: nsTAutoString_CharT(static_cast<const char16_t*>(data), length)
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{}
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#endif
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nsTAutoString_CharT( const self_type& str )
|
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: fixed_string_type(mStorage, kDefaultStorageSize, 0)
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{
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Assign(str);
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}
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explicit
|
|
nsTAutoString_CharT( const substring_type& str )
|
|
: fixed_string_type(mStorage, kDefaultStorageSize, 0)
|
|
{
|
|
Assign(str);
|
|
}
|
|
|
|
nsTAutoString_CharT( const substring_tuple_type& tuple )
|
|
: fixed_string_type(mStorage, kDefaultStorageSize, 0)
|
|
{
|
|
Assign(tuple);
|
|
}
|
|
|
|
// |operator=| does not inherit, so we must define our own
|
|
self_type& operator=( char_type c ) { Assign(c); return *this; }
|
|
self_type& operator=( const char_type* data ) { Assign(data); return *this; }
|
|
#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
|
|
self_type& operator=( char16ptr_t data ) { Assign(data); return *this; }
|
|
#endif
|
|
self_type& operator=( const self_type& str ) { Assign(str); return *this; }
|
|
self_type& operator=( const substring_type& str ) { Assign(str); return *this; }
|
|
self_type& operator=( const substring_tuple_type& tuple ) { Assign(tuple); return *this; }
|
|
|
|
enum { kDefaultStorageSize = 64 };
|
|
|
|
private:
|
|
|
|
char_type mStorage[kDefaultStorageSize];
|
|
};
|
|
|
|
|
|
//
|
|
// nsAutoString stores pointers into itself which are invalidated when an
|
|
// nsTArray is resized, so nsTArray must not be instantiated with nsAutoString
|
|
// elements!
|
|
//
|
|
template<class E> class nsTArrayElementTraits;
|
|
template<>
|
|
class nsTArrayElementTraits<nsTAutoString_CharT> {
|
|
public:
|
|
template<class A> struct Dont_Instantiate_nsTArray_of;
|
|
template<class A> struct Instead_Use_nsTArray_of;
|
|
|
|
static Dont_Instantiate_nsTArray_of<nsTAutoString_CharT> *
|
|
Construct(Instead_Use_nsTArray_of<nsTString_CharT> *e) {
|
|
return 0;
|
|
}
|
|
template<class A>
|
|
static Dont_Instantiate_nsTArray_of<nsTAutoString_CharT> *
|
|
Construct(Instead_Use_nsTArray_of<nsTString_CharT> *e,
|
|
const A &arg) {
|
|
return 0;
|
|
}
|
|
static Dont_Instantiate_nsTArray_of<nsTAutoString_CharT> *
|
|
Destruct(Instead_Use_nsTArray_of<nsTString_CharT> *e) {
|
|
return 0;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* nsTXPIDLString extends nsTString such that:
|
|
*
|
|
* (1) mData can be null
|
|
* (2) objects of this type can be automatically cast to |const CharT*|
|
|
* (3) getter_Copies method is supported to adopt data allocated with
|
|
* NS_Alloc, such as "out string" parameters in XPIDL.
|
|
*
|
|
* NAMES:
|
|
* nsXPIDLString for wide characters
|
|
* nsXPIDLCString for narrow characters
|
|
*/
|
|
class nsTXPIDLString_CharT : public nsTString_CharT
|
|
{
|
|
public:
|
|
|
|
typedef nsTXPIDLString_CharT self_type;
|
|
|
|
public:
|
|
|
|
nsTXPIDLString_CharT()
|
|
: string_type(char_traits::sEmptyBuffer, 0, F_TERMINATED | F_VOIDED) {}
|
|
|
|
// copy-constructor required to avoid default
|
|
nsTXPIDLString_CharT( const self_type& str )
|
|
: string_type(char_traits::sEmptyBuffer, 0, F_TERMINATED | F_VOIDED)
|
|
{
|
|
Assign(str);
|
|
}
|
|
|
|
// return nullptr if we are voided
|
|
#if defined(CharT_is_PRUnichar) && defined(MOZ_USE_CHAR16_WRAPPER)
|
|
char16ptr_t get() const
|
|
#else
|
|
const char_type* get() const
|
|
#endif
|
|
{
|
|
return (mFlags & F_VOIDED) ? nullptr : mData;
|
|
}
|
|
|
|
// this case operator is the reason why this class cannot just be a
|
|
// typedef for nsTString
|
|
operator const char_type*() const
|
|
{
|
|
return get();
|
|
}
|
|
|
|
// need this to diambiguous operator[int]
|
|
char_type operator[]( int32_t i ) const
|
|
{
|
|
return CharAt(index_type(i));
|
|
}
|
|
|
|
// |operator=| does not inherit, so we must define our own
|
|
self_type& operator=( char_type c ) { Assign(c); return *this; }
|
|
self_type& operator=( const char_type* data ) { Assign(data); return *this; }
|
|
self_type& operator=( const self_type& str ) { Assign(str); return *this; }
|
|
self_type& operator=( const substring_type& str ) { Assign(str); return *this; }
|
|
self_type& operator=( const substring_tuple_type& tuple ) { Assign(tuple); return *this; }
|
|
};
|
|
|
|
|
|
/**
|
|
* getter_Copies support for use with raw string out params:
|
|
*
|
|
* NS_IMETHOD GetBlah(char**);
|
|
*
|
|
* void some_function()
|
|
* {
|
|
* nsXPIDLCString blah;
|
|
* GetBlah(getter_Copies(blah));
|
|
* // ...
|
|
* }
|
|
*/
|
|
class MOZ_STACK_CLASS nsTGetterCopies_CharT
|
|
{
|
|
public:
|
|
typedef CharT char_type;
|
|
|
|
nsTGetterCopies_CharT(nsTSubstring_CharT& str)
|
|
: mString(str), mData(nullptr) {}
|
|
|
|
~nsTGetterCopies_CharT()
|
|
{
|
|
mString.Adopt(mData); // OK if mData is null
|
|
}
|
|
|
|
operator char_type**()
|
|
{
|
|
return &mData;
|
|
}
|
|
|
|
private:
|
|
nsTSubstring_CharT& mString;
|
|
char_type* mData;
|
|
};
|
|
|
|
inline
|
|
nsTGetterCopies_CharT
|
|
getter_Copies( nsTSubstring_CharT& aString )
|
|
{
|
|
return nsTGetterCopies_CharT(aString);
|
|
}
|
|
|
|
|
|
/**
|
|
* nsTAdoptingString extends nsTXPIDLString such that:
|
|
*
|
|
* (1) Adopt given string on construction or assignment, i.e. take
|
|
* the value of what's given, and make what's given forget its
|
|
* value. Note that this class violates constness in a few
|
|
* places. Be careful!
|
|
*/
|
|
class nsTAdoptingString_CharT : public nsTXPIDLString_CharT
|
|
{
|
|
public:
|
|
|
|
typedef nsTAdoptingString_CharT self_type;
|
|
|
|
public:
|
|
|
|
explicit nsTAdoptingString_CharT() {}
|
|
explicit nsTAdoptingString_CharT(char_type* str, size_type length = size_type(-1))
|
|
{
|
|
Adopt(str, length);
|
|
}
|
|
|
|
// copy-constructor required to adopt on copy. Note that this
|
|
// will violate the constness of |str| in the operator=()
|
|
// call. |str| will be truncated as a side-effect of this
|
|
// constructor.
|
|
nsTAdoptingString_CharT( const self_type& str )
|
|
{
|
|
*this = str;
|
|
}
|
|
|
|
// |operator=| does not inherit, so we must define our own
|
|
self_type& operator=( const substring_type& str ) { Assign(str); return *this; }
|
|
self_type& operator=( const substring_tuple_type& tuple ) { Assign(tuple); return *this; }
|
|
|
|
// Adopt(), if possible, when assigning to a self_type&. Note
|
|
// that this violates the constness of str, str is always
|
|
// truncated when this operator is called.
|
|
self_type& operator=( const self_type& str );
|
|
|
|
private:
|
|
self_type& operator=( const char_type* data ) MOZ_DELETE;
|
|
self_type& operator=( char_type* data ) MOZ_DELETE;
|
|
};
|
|
|