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Diffstat (limited to 'include/rtl/ustrbuf.hxx')
| -rw-r--r-- | include/rtl/ustrbuf.hxx | 1796 |
1 files changed, 1796 insertions, 0 deletions
diff --git a/include/rtl/ustrbuf.hxx b/include/rtl/ustrbuf.hxx new file mode 100644 index 000000000..8c8cc54f8 --- /dev/null +++ b/include/rtl/ustrbuf.hxx @@ -0,0 +1,1796 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 . + */ + +/* + * This file is part of LibreOffice published API. + */ + +#ifndef INCLUDED_RTL_USTRBUF_HXX +#define INCLUDED_RTL_USTRBUF_HXX + +#include "sal/config.h" + +#include <cassert> +#include <cstring> +#include <limits> +#include <new> + +#if defined LIBO_INTERNAL_ONLY +#include <string_view> +#include <type_traits> +#endif + +#include "rtl/ustrbuf.h" +#include "rtl/ustring.hxx" +#include "rtl/stringutils.hxx" +#include "sal/types.h" + +#ifdef LIBO_INTERNAL_ONLY // "RTL_FAST_STRING" +#include "rtl/stringconcat.hxx" +#endif + +#ifdef RTL_STRING_UNITTEST +extern bool rtl_string_unittest_invalid_conversion; +#endif + +// The unittest uses slightly different code to help check that the proper +// calls are made. The class is put into a different namespace to make +// sure the compiler generates a different (if generating also non-inline) +// copy of the function and does not merge them together. The class +// is "brought" into the proper rtl namespace by a typedef below. +#ifdef RTL_STRING_UNITTEST +#define rtl rtlunittest +#endif + +namespace rtl +{ + +#ifdef RTL_STRING_UNITTEST +#undef rtl +#endif + +/** A string buffer implements a mutable sequence of characters. + */ +class SAL_WARN_UNUSED OUStringBuffer +{ +friend class OUString; +public: + /** + Constructs a string buffer with no characters in it and an + initial capacity of 16 characters. + */ + OUStringBuffer() + : pData(NULL) + , nCapacity( 16 ) + { + rtl_uString_new_WithLength( &pData, nCapacity ); + } + + /** + Allocates a new string buffer that contains the same sequence of + characters as the string buffer argument. + + @param value a <code>OUStringBuffer</code>. + */ + OUStringBuffer( const OUStringBuffer & value ) + : pData(NULL) + , nCapacity( value.nCapacity ) + { + rtl_uStringbuffer_newFromStringBuffer( &pData, value.nCapacity, value.pData ); + } + + /** + Constructs a string buffer with no characters in it and an + initial capacity specified by the <code>length</code> argument. + + @param length the initial capacity. + */ + explicit OUStringBuffer(sal_Int32 length) + : pData(NULL) + , nCapacity( length ) + { + rtl_uString_new_WithLength( &pData, length ); + } +#if defined LIBO_INTERNAL_ONLY + template<typename T> + explicit OUStringBuffer(T length, std::enable_if_t<std::is_integral_v<T>, int> = 0) + : OUStringBuffer(static_cast<sal_Int32>(length)) + { + assert( + length >= 0 + && static_cast<std::make_unsigned_t<T>>(length) + <= static_cast<std::make_unsigned_t<sal_Int32>>( + std::numeric_limits<sal_Int32>::max())); + } + // avoid (obvious) bugs + explicit OUStringBuffer(bool) = delete; + explicit OUStringBuffer(char) = delete; + explicit OUStringBuffer(wchar_t) = delete; +#if defined __cpp_char8_t + explicit OUStringBuffer(char8_t) = delete; +#endif + explicit OUStringBuffer(char16_t) = delete; + explicit OUStringBuffer(char32_t) = delete; +#endif + + /** + Constructs a string buffer so that it represents the same + sequence of characters as the string argument. + + The initial + capacity of the string buffer is <code>16</code> plus the length + of the string argument. + + @param value the initial contents of the buffer. + */ +#if defined LIBO_INTERNAL_ONLY + OUStringBuffer(std::u16string_view sv) + : pData(nullptr) + , nCapacity( sv.length() + 16 ) + { + if (sv.size() > sal_uInt32(std::numeric_limits<sal_Int32>::max())) { + throw std::bad_alloc(); + } + rtl_uStringbuffer_newFromStr_WithLength( &pData, sv.data(), sv.length() ); + } +#else + OUStringBuffer(const OUString& value) + : pData(NULL) + , nCapacity( value.getLength() + 16 ) + { + rtl_uStringbuffer_newFromStr_WithLength( &pData, value.getStr(), value.getLength() ); + } +#endif + + template< typename T > + OUStringBuffer( T& literal, typename libreoffice_internal::ConstCharArrayDetector< T, libreoffice_internal::Dummy >::Type = libreoffice_internal::Dummy() ) + : pData(NULL) + , nCapacity( libreoffice_internal::ConstCharArrayDetector<T>::length + 16 ) + { + assert( + libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal)); + rtl_uString_newFromLiteral( + &pData, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length, 16); +#ifdef RTL_STRING_UNITTEST + rtl_string_unittest_const_literal = true; +#endif + } + +#if defined LIBO_INTERNAL_ONLY + /** @overload @since LibreOffice 5.3 */ + template<typename T> + OUStringBuffer( + T & literal, + typename libreoffice_internal::ConstCharArrayDetector< + T, libreoffice_internal::Dummy>::TypeUtf16 + = libreoffice_internal::Dummy()): + pData(nullptr), + nCapacity(libreoffice_internal::ConstCharArrayDetector<T>::length + 16) + { + rtl_uStringbuffer_newFromStr_WithLength( + &pData, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + } +#endif + +#if defined LIBO_INTERNAL_ONLY && defined RTL_STRING_UNITTEST + /// @cond INTERNAL + /** + * Only used by unittests to detect incorrect conversions. + * @internal + */ + template< typename T > + OUStringBuffer( T&, typename libreoffice_internal::ExceptConstCharArrayDetector< T >::Type = libreoffice_internal::Dummy() ) + { + pData = NULL; + nCapacity = 10; + rtl_uString_newFromLiteral( &pData, "!!br0ken!!", 10, 0 ); // set to garbage + rtl_string_unittest_invalid_conversion = true; + } + /** + * Only used by unittests to detect incorrect conversions. + * @internal + */ + template< typename T > + OUStringBuffer( const T&, typename libreoffice_internal::ExceptCharArrayDetector< T >::Type = libreoffice_internal::Dummy() ) + { + pData = NULL; + nCapacity = 10; + rtl_uString_newFromLiteral( &pData, "!!br0ken!!", 10, 0 ); // set to garbage + rtl_string_unittest_invalid_conversion = true; + } + /// @endcond +#endif + +#ifdef LIBO_INTERNAL_ONLY // "RTL_FAST_STRING" + /** + @overload + @internal + */ + template< typename T1, typename T2 > + OUStringBuffer( OUStringConcat< T1, T2 >&& c ) + { + const sal_Int32 l = c.length(); + nCapacity = l + 16; + pData = rtl_uString_alloc( nCapacity ); + sal_Unicode* end = c.addData( pData->buffer ); + *end = '\0'; + pData->length = l; + } + + /** + @overload + @internal + */ + template< typename T > + OUStringBuffer( OUStringNumber< T >&& n ) + : pData(NULL) + , nCapacity( n.length + 16 ) + { + rtl_uStringbuffer_newFromStr_WithLength( &pData, n.buf, n.length ); + } +#endif + +#if defined LIBO_INTERNAL_ONLY + operator std::u16string_view() const { return {getStr(), sal_uInt32(getLength())}; } +#endif + + /** Assign to this a copy of value. + */ + OUStringBuffer& operator = ( const OUStringBuffer& value ) + { + if (this != &value) + { + rtl_uStringbuffer_newFromStringBuffer(&pData, + value.nCapacity, + value.pData); + nCapacity = value.nCapacity; + } + return *this; + } + +#if defined LIBO_INTERNAL_ONLY + /** Move assignment + * @since LibreOffice 7.3 + */ + OUStringBuffer& operator = ( OUStringBuffer&& value ) noexcept + { + rtl_uString_release( pData ); + pData = value.pData; + nCapacity = value.nCapacity; + value.pData = nullptr; + value.nCapacity = 0; + rtl_uString_new( &value.pData ); + return *this; + } +#endif + + /** Assign from a string. + + @since LibreOffice 5.3 + */ +#if defined LIBO_INTERNAL_ONLY + OUStringBuffer & operator =(std::u16string_view string) { + sal_Int32 n = string.length(); + if (n >= nCapacity) { + ensureCapacity(n + 16); //TODO: check for overflow + } + std::memcpy( + pData->buffer, string.data(), + n * sizeof (sal_Unicode)); + pData->buffer[n] = '\0'; + pData->length = n; + return *this; + } +#else + OUStringBuffer & operator =(OUString const & string) { + sal_Int32 n = string.getLength(); + if (n >= nCapacity) { + ensureCapacity(n + 16); //TODO: check for overflow + } + std::memcpy( + pData->buffer, string.pData->buffer, + (n + 1) * sizeof (sal_Unicode)); + pData->length = n; + return *this; + } +#endif + + /** Assign from a string literal. + + @since LibreOffice 5.3 + */ + template<typename T> + typename + libreoffice_internal::ConstCharArrayDetector<T, OUStringBuffer &>::Type + operator =(T & literal) { + assert( + libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal)); + sal_Int32 const n + = libreoffice_internal::ConstCharArrayDetector<T>::length; + if (n >= nCapacity) { + ensureCapacity(n + 16); //TODO: check for overflow + } + char const * from + = libreoffice_internal::ConstCharArrayDetector<T>::toPointer( + literal); + sal_Unicode * to = pData->buffer; + for (sal_Int32 i = 0; i <= n; ++i) { + to[i] = from[i]; + } + pData->length = n; + return *this; + } + +#if defined LIBO_INTERNAL_ONLY + /** @overload @since LibreOffice 5.3 */ + template<typename T> + typename libreoffice_internal::ConstCharArrayDetector< + T, OUStringBuffer &>::TypeUtf16 + operator =(T & literal) { + sal_Int32 const n + = libreoffice_internal::ConstCharArrayDetector<T>::length; + if (n >= nCapacity) { + ensureCapacity(n + 16); //TODO: check for overflow + } + // For OUStringChar, which is covered by this template's ConstCharArrayDetector TypeUtf16 + // check, toPointer does not return a NUL-terminated string, so we can't just memcpy n+1 + // elements but rather need to add the terminating NUL manually: + std::memcpy( + pData->buffer, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + n * sizeof (sal_Unicode)); + pData->buffer[n] = '\0'; + pData->length = n; + return *this; + } +#endif + +#if defined LIBO_INTERNAL_ONLY + /** @overload @since LibreOffice 5.3 */ + template<typename T1, typename T2> + OUStringBuffer & operator =(OUStringConcat<T1, T2> && concat) { + sal_Int32 const n = concat.length(); + if (n >= nCapacity) { + ensureCapacity(n + 16); //TODO: check for overflow + } + *concat.addData(pData->buffer) = 0; + pData->length = n; + return *this; + } + + /** @overload @internal */ + template<typename T> + OUStringBuffer & operator =(OUStringNumber<T> && n) + { + *this = OUStringBuffer( std::move( n ) ); + return *this; + } +#endif + + /** + Release the string data. + */ + ~OUStringBuffer() + { + rtl_uString_release( pData ); + } + + /** + Fill the string data in the new string and clear the buffer. + + This method is more efficient than the constructor of the string. It does + not copy the buffer. + + @return the string previously contained in the buffer. + */ + SAL_WARN_UNUSED_RESULT OUString makeStringAndClear() + { + return OUString( + rtl_uStringBuffer_makeStringAndClear( &pData, &nCapacity ), + SAL_NO_ACQUIRE ); + } + + /** + Returns the length (character count) of this string buffer. + + @return the number of characters in this string buffer. + */ + sal_Int32 getLength() const + { + return pData->length; + } + + /** + Checks if a string buffer is empty. + + @return true if the string buffer is empty; + false, otherwise. + + @since LibreOffice 4.1 + */ + bool isEmpty() const + { + return pData->length == 0; + } + + /** + Returns the current capacity of the String buffer. + + The capacity + is the amount of storage available for newly inserted + characters. The real buffer size is 2 bytes longer, because + all strings are 0 terminated. + + @return the current capacity of this string buffer. + */ + sal_Int32 getCapacity() const + { + return nCapacity; + } + + /** + Ensures that the capacity of the buffer is at least equal to the + specified minimum. + + The new capacity will be at least as large as the maximum of the current + length (so that no contents of the buffer is destroyed) and the given + minimumCapacity. If the given minimumCapacity is negative, nothing is + changed. + + @param minimumCapacity the minimum desired capacity. + */ + void ensureCapacity(sal_Int32 minimumCapacity) + { + rtl_uStringbuffer_ensureCapacity( &pData, &nCapacity, minimumCapacity ); + } + + /** + Sets the length of this String buffer. + + If the <code>newLength</code> argument is less than the current + length of the string buffer, the string buffer is truncated to + contain exactly the number of characters given by the + <code>newLength</code> argument. + <p> + If the <code>newLength</code> argument is greater than or equal + to the current length, sufficient null characters + (<code>'\u0000'</code>) are appended to the string buffer so that + length becomes the <code>newLength</code> argument. + <p> + The <code>newLength</code> argument must be greater than or equal + to <code>0</code>. + + @param newLength the new length of the buffer. + */ + void setLength(sal_Int32 newLength) + { + assert(newLength >= 0); + // Avoid modifications if pData points to const empty string: + if( newLength != pData->length ) + { + if( newLength > nCapacity ) + rtl_uStringbuffer_ensureCapacity(&pData, &nCapacity, newLength); + else + pData->buffer[newLength] = 0; + pData->length = newLength; + } + } + + /** + Returns the character at a specific index in this string buffer. + + The first character of a string buffer is at index + <code>0</code>, the next at index <code>1</code>, and so on, for + array indexing. + <p> + The index argument must be greater than or equal to + <code>0</code>, and less than the length of this string buffer. + + @param index the index of the desired character. + @return the character at the specified index of this string buffer. + */ + SAL_DEPRECATED("use rtl::OUStringBuffer::operator [] instead") + sal_Unicode charAt( sal_Int32 index ) const + { + assert(index >= 0 && index < pData->length); + return pData->buffer[ index ]; + } + + /** + The character at the specified index of this string buffer is set + to <code>ch</code>. + + The index argument must be greater than or equal to + <code>0</code>, and less than the length of this string buffer. + + @param index the index of the character to modify. + @param ch the new character. + */ + SAL_DEPRECATED("use rtl::OUStringBuffer::operator [] instead") + OUStringBuffer & setCharAt(sal_Int32 index, sal_Unicode ch) + { + assert(index >= 0 && index < pData->length); + pData->buffer[ index ] = ch; + return *this; + } + + /** + Return a null terminated unicode character array. + */ + const sal_Unicode* getStr() const SAL_RETURNS_NONNULL { return pData->buffer; } + + /** + Access to individual characters. + + @param index must be non-negative and less than length. + + @return a reference to the character at the given index. + + @since LibreOffice 3.5 + */ + sal_Unicode & operator [](sal_Int32 index) + { + assert(index >= 0 && index < pData->length); + return pData->buffer[index]; + } + + /** + Access to individual characters. + + @param index must be non-negative and less than length. + + @return a reference to the character at the given index. + + @since LibreOffice 4.2 + */ + const sal_Unicode & operator [](sal_Int32 index) const + { + assert(index >= 0 && index < pData->length); + return pData->buffer[index]; + } + + /** + Return an OUString instance reflecting the current content + of this OUStringBuffer. + */ + OUString toString() const + { + return OUString(pData->buffer, pData->length); + } + + /** + Appends the string to this string buffer. + + The characters of the <code>OUString</code> argument are appended, in + order, to the contents of this string buffer, increasing the + length of this string buffer by the length of the argument. + + @param str a string. + @return this string buffer. + */ +#if !defined LIBO_INTERNAL_ONLY + OUStringBuffer & append(const OUString &str) + { + return append( str.getStr(), str.getLength() ); + } +#else + OUStringBuffer & append(std::u16string_view sv) { + if (sv.size() > sal_uInt32(std::numeric_limits<sal_Int32>::max())) { + throw std::bad_alloc(); + } + return append(sv.data(), sv.size()); + } +#endif + +#if !defined LIBO_INTERNAL_ONLY + /** + Appends the content of a stringbuffer to this string buffer. + + The characters of the <code>OUStringBuffer</code> argument are appended, in + order, to the contents of this string buffer, increasing the + length of this string buffer by the length of the argument. + + @param str a string. + @return this string buffer. + + @since LibreOffice 4.0 + */ + OUStringBuffer & append(const OUStringBuffer &str) + { + if(!str.isEmpty()) + { + append( str.getStr(), str.getLength() ); + } + return *this; + } +#endif + + /** + Appends the string representation of the <code>char</code> array + argument to this string buffer. + + The characters of the array argument are appended, in order, to + the contents of this string buffer. The length of this string + buffer increases by the length of the argument. + + @param str the characters to be appended. + @return this string buffer. + */ +#if defined LIBO_INTERNAL_ONLY + template<typename T> + typename libreoffice_internal::CharPtrDetector<T, OUStringBuffer &>::TypeUtf16 + append(T const & str) +#else + OUStringBuffer & append( const sal_Unicode * str ) +#endif + { + return append( str, rtl_ustr_getLength( str ) ); + } + + /** + Appends the string representation of the <code>char</code> array + argument to this string buffer. + + Characters of the character array <code>str</code> are appended, + in order, to the contents of this string buffer. The length of this + string buffer increases by the value of <code>len</code>. + + @param str the characters to be appended; must be non-null, and must + point to at least len characters + @param len the number of characters to append; must be non-negative + @return this string buffer. + */ + OUStringBuffer & append( const sal_Unicode * str, sal_Int32 len) + { + assert( len == 0 || str != NULL ); // cannot assert that in rtl_uStringbuffer_insert + rtl_uStringbuffer_insert( &pData, &nCapacity, getLength(), str, len ); + return *this; + } + + /** + @overload + This function accepts an ASCII string literal as its argument. + @since LibreOffice 3.6 + */ + template< typename T > + typename libreoffice_internal::ConstCharArrayDetector< T, OUStringBuffer& >::Type append( T& literal ) + { + assert( + libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal)); + return appendAscii( + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + } + +#if defined LIBO_INTERNAL_ONLY + template<typename T> + typename libreoffice_internal::NonConstCharArrayDetector<T, OUStringBuffer &>::TypeUtf16 + append(T & value) { return append(static_cast<sal_Unicode *>(value)); } + + /** @overload @since LibreOffice 5.3 */ + template<typename T> + typename libreoffice_internal::ConstCharArrayDetector< + T, OUStringBuffer &>::TypeUtf16 + append(T & literal) { + return append( + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + } +#endif + +#ifdef LIBO_INTERNAL_ONLY // "RTL_FAST_STRING" + /** + @overload + @internal + */ + template< typename T1, typename T2 > + OUStringBuffer& append( OUStringConcat< T1, T2 >&& c ) + { + sal_Int32 l = c.length(); + if( l == 0 ) + return *this; + l += pData->length; + rtl_uStringbuffer_ensureCapacity( &pData, &nCapacity, l ); + sal_Unicode* end = c.addData( pData->buffer + pData->length ); + *end = '\0'; + pData->length = l; + return *this; + } + + /** + @overload + @internal + */ + template< typename T > + OUStringBuffer& append( OUStringNumber< T >&& c ) + { + return append( c.buf, c.length ); + } +#endif + + /** + Appends a 8-Bit ASCII character string to this string buffer. + + Since this method is optimized for performance. the ASCII + character values are not converted in any way. The caller + has to make sure that all ASCII characters are in the + allowed range between 0 and 127. The ASCII string must be + NULL-terminated. + <p> + The characters of the array argument are appended, in order, to + the contents of this string buffer. The length of this string + buffer increases by the length of the argument. + + @param str the 8-Bit ASCII characters to be appended. + @return this string buffer. + */ + OUStringBuffer & appendAscii( const char * str ) + { + return appendAscii( str, rtl_str_getLength( str ) ); + } + + /** + Appends a 8-Bit ASCII character string to this string buffer. + + Since this method is optimized for performance. the ASCII + character values are not converted in any way. The caller + has to make sure that all ASCII characters are in the + allowed range between 0 and 127. The ASCII string must be + NULL-terminated. + <p> + Characters of the character array <code>str</code> are appended, + in order, to the contents of this string buffer. The length of this + string buffer increases by the value of <code>len</code>. + + @param str the 8-Bit ASCII characters to be appended; must be non-null, + and must point to at least len characters + @param len the number of characters to append; must be non-negative + @return this string buffer. + */ + OUStringBuffer & appendAscii( const char * str, sal_Int32 len) + { + rtl_uStringbuffer_insert_ascii( &pData, &nCapacity, getLength(), str, len ); + return *this; + } + + /** + Appends the string representation of the <code>bool</code> + argument to the string buffer. + + The argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then appended to this string buffer. + + @param b a <code>bool</code>. + @return this string buffer. + + @since LibreOffice 4.1 + */ + OUStringBuffer & append(bool b) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFBOOLEAN]; + return append( sz, rtl_ustr_valueOfBoolean( sz, b ) ); + } + + /// @cond INTERNAL + // Pointer can be automatically converted to bool, which is unwanted here. + // Explicitly delete all pointer append() overloads to prevent this + // (except for char* and sal_Unicode* overloads, which are handled elsewhere). + template< typename T > + typename libreoffice_internal::Enable< void, + !libreoffice_internal::CharPtrDetector< T* >::ok && !libreoffice_internal::SalUnicodePtrDetector< T* >::ok >::Type + append( T* ) SAL_DELETED_FUNCTION; + /// @endcond + + // This overload is needed because OUString has a ctor from rtl_uString*, but + // the bool overload above would be preferred to the conversion. + /** + @internal + */ + OUStringBuffer & append(rtl_uString* str) + { + return append( OUString( str )); + } + + /** + Appends the string representation of the <code>sal_Bool</code> + argument to the string buffer. + + The argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then appended to this string buffer. + + @param b a <code>sal_Bool</code>. + @return this string buffer. + */ + OUStringBuffer & append(sal_Bool b) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFBOOLEAN]; + return append( sz, rtl_ustr_valueOfBoolean( sz, b ) ); + } + + /** + Appends the string representation of the ASCII <code>char</code> + argument to this string buffer. + + The argument is appended to the contents of this string buffer. + The length of this string buffer increases by <code>1</code>. + + @param c an ASCII <code>char</code>. + @return this string buffer. + + @since LibreOffice 3.5 + */ + OUStringBuffer & append(char c) + { + assert(static_cast< unsigned char >(c) <= 0x7F); + return append(sal_Unicode(c)); + } + + /** + Appends the string representation of the <code>char</code> + argument to this string buffer. + + The argument is appended to the contents of this string buffer. + The length of this string buffer increases by <code>1</code>. + + @param c a <code>char</code>. + @return this string buffer. + */ + OUStringBuffer & append(sal_Unicode c) + { + return append( &c, 1 ); + } + +#if defined LIBO_INTERNAL_ONLY + void append(sal_uInt16) = delete; +#endif + + /** + Appends the string representation of the <code>sal_Int32</code> + argument to this string buffer. + + The argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then appended to this string buffer. + + @param i an <code>sal_Int32</code>. + @param radix the radix + @return this string buffer. + */ + OUStringBuffer & append(sal_Int32 i, sal_Int16 radix = 10 ) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFINT32]; + return append( sz, rtl_ustr_valueOfInt32( sz, i, radix ) ); + } + + /** + Appends the string representation of the <code>long</code> + argument to this string buffer. + + The argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then appended to this string buffer. + + @param l a <code>long</code>. + @param radix the radix + @return this string buffer. + */ + OUStringBuffer & append(sal_Int64 l, sal_Int16 radix = 10 ) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFINT64]; + return append( sz, rtl_ustr_valueOfInt64( sz, l, radix ) ); + } + + /** + Appends the string representation of the <code>float</code> + argument to this string buffer. + + The argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then appended to this string buffer. + + @param f a <code>float</code>. + @return this string buffer. + */ + OUStringBuffer & append(float f) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFFLOAT]; + return append( sz, rtl_ustr_valueOfFloat( sz, f ) ); + } + + /** + Appends the string representation of the <code>double</code> + argument to this string buffer. + + The argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then appended to this string buffer. + + @param d a <code>double</code>. + @return this string buffer. + */ + OUStringBuffer & append(double d) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFDOUBLE]; + return append( sz, rtl_ustr_valueOfDouble( sz, d ) ); + } + + /** + Appends a single UTF-32 character to this string buffer. + + <p>The single UTF-32 character will be represented within the string + buffer as either one or two UTF-16 code units.</p> + + @param c a well-formed UTF-32 code unit (that is, a value in the range + <code>0</code>–<code>0x10FFFF</code>, but excluding + <code>0xD800</code>–<code>0xDFFF</code>) + + @return + this string buffer + */ + OUStringBuffer & appendUtf32(sal_uInt32 c) { + return insertUtf32(getLength(), c); + } + + /** + Unsafe way to make space for a fixed amount of characters to be appended + into this OUStringBuffer. + + A call to this function must immediately be followed by code that + completely fills the uninitialized block pointed to by the return value. + + @param length the length of the uninitialized block of sal_Unicode + entities; must be non-negative + + @return a pointer to the start of the uninitialized block; only valid + until this OUStringBuffer's capacity changes + + @since LibreOffice 4.4 + */ + sal_Unicode * appendUninitialized(sal_Int32 length) SAL_RETURNS_NONNULL { + sal_Int32 n = getLength(); + rtl_uStringbuffer_insert(&pData, &nCapacity, n, NULL, length); + return pData->buffer + n; + } + + /** + Inserts the string into this string buffer. + + The characters of the <code>String</code> argument are inserted, in + order, into this string buffer at the indicated offset. The length + of this string buffer is increased by the length of the argument. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param str a string. + @return this string buffer. + */ +#if defined LIBO_INTERNAL_ONLY + OUStringBuffer & insert(sal_Int32 offset, std::u16string_view str) + { + return insert( offset, str.data(), str.length() ); + } +#else + OUStringBuffer & insert(sal_Int32 offset, const OUString & str) + { + return insert( offset, str.getStr(), str.getLength() ); + } +#endif + + /** + Inserts the string representation of the <code>char</code> array + argument into this string buffer. + + The characters of the array argument are inserted into the + contents of this string buffer at the position indicated by + <code>offset</code>. The length of this string buffer increases by + the length of the argument. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param str a character array. + @return this string buffer. + */ + OUStringBuffer & insert( sal_Int32 offset, const sal_Unicode * str ) + { + return insert( offset, str, rtl_ustr_getLength( str ) ); + } + + /** + Inserts the string representation of the <code>char</code> array + argument into this string buffer. + + The characters of the array argument are inserted into the + contents of this string buffer at the position indicated by + <code>offset</code>. The length of this string buffer increases by + the length of the argument. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param str a character array. + @param len the number of characters to append. + @return this string buffer. + */ + OUStringBuffer & insert( sal_Int32 offset, const sal_Unicode * str, sal_Int32 len) + { + assert( len == 0 || str != NULL ); // cannot assert that in rtl_uStringbuffer_insert + rtl_uStringbuffer_insert( &pData, &nCapacity, offset, str, len ); + return *this; + } + + /** + @overload + This function accepts an ASCII string literal as its argument. + @since LibreOffice 3.6 + */ + template< typename T > + typename libreoffice_internal::ConstCharArrayDetector< T, OUStringBuffer& >::Type insert( sal_Int32 offset, T& literal ) + { + assert( + libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal)); + rtl_uStringbuffer_insert_ascii( + &pData, &nCapacity, offset, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + return *this; + } + +#if defined LIBO_INTERNAL_ONLY + /** @overload @since LibreOffice 5.3 */ + template<typename T> + typename libreoffice_internal::ConstCharArrayDetector< + T, OUStringBuffer &>::TypeUtf16 + insert(sal_Int32 offset, T & literal) { + return insert( + offset, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + } +#endif + + /** + Inserts the string representation of the <code>sal_Bool</code> + argument into this string buffer. + + The second argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then inserted into this string buffer at the indicated + offset. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param b a <code>sal_Bool</code>. + @return this string buffer. + */ + OUStringBuffer & insert(sal_Int32 offset, sal_Bool b) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFBOOLEAN]; + return insert( offset, sz, rtl_ustr_valueOfBoolean( sz, b ) ); + } + + /** + Inserts the string representation of the <code>bool</code> + argument into this string buffer. + + The second argument is converted to a string as if by the method + <code>OUString::boolean</code>, and the characters of that + string are then inserted into this string buffer at the indicated + offset. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param b a <code>bool</code>. + @return this string buffer. + + @since LibreOffice 4.3 + */ + OUStringBuffer & insert(sal_Int32 offset, bool b) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFBOOLEAN]; + return insert( offset, sz, rtl_ustr_valueOfBoolean( sz, b ) ); + } + + /** + Inserts the string representation of the <code>char</code> + argument into this string buffer. + + The second argument is inserted into the contents of this string + buffer at the position indicated by <code>offset</code>. The length + of this string buffer increases by one. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param c a <code>char</code>. + @return this string buffer. + + @since LibreOffice 3.6 + */ + OUStringBuffer & insert(sal_Int32 offset, char c) + { + sal_Unicode u = c; + return insert( offset, &u, 1 ); + } + + /** + Inserts the string representation of the <code>char</code> + argument into this string buffer. + + The second argument is inserted into the contents of this string + buffer at the position indicated by <code>offset</code>. The length + of this string buffer increases by one. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param c a <code>char</code>. + @return this string buffer. + */ + OUStringBuffer & insert(sal_Int32 offset, sal_Unicode c) + { + return insert( offset, &c, 1 ); + } + + /** + Inserts the string representation of the second <code>sal_Int32</code> + argument into this string buffer. + + The second argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then inserted into this string buffer at the indicated + offset. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param i an <code>sal_Int32</code>. + @param radix the radix. + @return this string buffer. + @exception StringIndexOutOfBoundsException if the offset is invalid. + */ + OUStringBuffer & insert(sal_Int32 offset, sal_Int32 i, sal_Int16 radix = 10 ) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFINT32]; + return insert( offset, sz, rtl_ustr_valueOfInt32( sz, i, radix ) ); + } + + /** + Inserts the string representation of the <code>long</code> + argument into this string buffer. + + The second argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then inserted into this string buffer at the indicated + offset. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param l a <code>long</code>. + @param radix the radix. + @return this string buffer. + @exception StringIndexOutOfBoundsException if the offset is invalid. + */ + OUStringBuffer & insert(sal_Int32 offset, sal_Int64 l, sal_Int16 radix = 10 ) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFINT64]; + return insert( offset, sz, rtl_ustr_valueOfInt64( sz, l, radix ) ); + } + + /** + Inserts the string representation of the <code>float</code> + argument into this string buffer. + + The second argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then inserted into this string buffer at the indicated + offset. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param f a <code>float</code>. + @return this string buffer. + @exception StringIndexOutOfBoundsException if the offset is invalid. + */ + OUStringBuffer insert(sal_Int32 offset, float f) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFFLOAT]; + return insert( offset, sz, rtl_ustr_valueOfFloat( sz, f ) ); + } + + /** + Inserts the string representation of the <code>double</code> + argument into this string buffer. + + The second argument is converted to a string as if by the method + <code>String.valueOf</code>, and the characters of that + string are then inserted into this string buffer at the indicated + offset. + <p> + The offset argument must be greater than or equal to + <code>0</code>, and less than or equal to the length of this + string buffer. + + @param offset the offset. + @param d a <code>double</code>. + @return this string buffer. + @exception StringIndexOutOfBoundsException if the offset is invalid. + */ + OUStringBuffer & insert(sal_Int32 offset, double d) + { + sal_Unicode sz[RTL_USTR_MAX_VALUEOFDOUBLE]; + return insert( offset, sz, rtl_ustr_valueOfDouble( sz, d ) ); + } + + /** + Inserts a single UTF-32 character into this string buffer. + + <p>The single UTF-32 character will be represented within the string + buffer as either one or two UTF-16 code units.</p> + + @param offset the offset into this string buffer (from zero to the length + of this string buffer, inclusive) + + @param c a well-formed UTF-32 code unit (that is, a value in the range + <code>0</code>–<code>0x10FFFF</code>, but excluding + <code>0xD800</code>–<code>0xDFFF</code>) + + @return this string buffer + */ + OUStringBuffer & insertUtf32(sal_Int32 offset, sal_uInt32 c) { + rtl_uStringbuffer_insertUtf32(&pData, &nCapacity, offset, c); + return *this; + } + + /** + Removes the characters in a substring of this sequence. + + The substring begins at the specified <code>start</code> and + is <code>len</code> characters long. + + start must be >= 0 && <= This->length + + @param start The beginning index, inclusive + @param len The substring length + @return this string buffer. + */ + OUStringBuffer & remove( sal_Int32 start, sal_Int32 len ) + { + rtl_uStringbuffer_remove( &pData, start, len ); + return *this; + } + + /** + Removes the tail of a string buffer start at the indicate position + + start must be >= 0 && <= This->length + + @param start The beginning index, inclusive. default to 0 + @return this string buffer. + + @since LibreOffice 4.0 + */ + OUStringBuffer & truncate( sal_Int32 start = 0 ) + { + rtl_uStringbuffer_remove( &pData, start, getLength() - start ); + return *this; + } + + /** + Replace all occurrences of + oldChar in this string buffer with newChar. + + @since LibreOffice 4.0 + + @param oldChar the old character. + @param newChar the new character. + @return this string buffer + */ + OUStringBuffer& replace( sal_Unicode oldChar, sal_Unicode newChar ) + { + sal_Int32 index = 0; + while((index = indexOf(oldChar, index)) >= 0) + { + pData->buffer[ index ] = newChar; + } + return *this; + } + + /** Allows access to the internal data of this OUStringBuffer, for effective + manipulation. + + This method should be used with care. After you have called this + method, you may use the returned pInternalData or pInternalCapacity only + as long as you make no other method call on this OUStringBuffer. + + @param pInternalData + This output parameter receives a pointer to the internal data + (rtl_uString pointer). pInternalData itself must not be null. + + @param pInternalCapacity + This output parameter receives a pointer to the internal capacity. + pInternalCapacity itself must not be null. + */ + void accessInternals(rtl_uString *** pInternalData, + sal_Int32 ** pInternalCapacity) + { + *pInternalData = &pData; + *pInternalCapacity = &nCapacity; + } + + + /** + Returns the index within this string of the first occurrence of the + specified character, starting the search at the specified index. + + @since LibreOffice 4.0 + + @param ch character to be located. + @param fromIndex the index to start the search from. + The index must be greater or equal than 0 + and less or equal as the string length. + @return the index of the first occurrence of the character in the + character sequence represented by this string that is + greater than or equal to fromIndex, or + -1 if the character does not occur. + */ + sal_Int32 indexOf( sal_Unicode ch, sal_Int32 fromIndex = 0 ) const + { + assert( fromIndex >= 0 && fromIndex <= pData->length ); + sal_Int32 ret = rtl_ustr_indexOfChar_WithLength( pData->buffer+fromIndex, pData->length-fromIndex, ch ); + return (ret < 0 ? ret : ret+fromIndex); + } + + /** + Returns the index within this string of the last occurrence of the + specified character, searching backward starting at the end. + + @since LibreOffice 4.0 + + @param ch character to be located. + @return the index of the last occurrence of the character in the + character sequence represented by this string, or + -1 if the character does not occur. + */ + sal_Int32 lastIndexOf( sal_Unicode ch ) const + { + return rtl_ustr_lastIndexOfChar_WithLength( pData->buffer, pData->length, ch ); + } + + /** + Returns the index within this string of the last occurrence of the + specified character, searching backward starting before the specified + index. + + @since LibreOffice 4.0 + + @param ch character to be located. + @param fromIndex the index before which to start the search. + @return the index of the last occurrence of the character in the + character sequence represented by this string that + is less than fromIndex, or -1 + if the character does not occur before that point. + */ + sal_Int32 lastIndexOf( sal_Unicode ch, sal_Int32 fromIndex ) const + { + assert( fromIndex >= 0 && fromIndex <= pData->length ); + return rtl_ustr_lastIndexOfChar_WithLength( pData->buffer, fromIndex, ch ); + } + + /** + Returns the index within this string of the first occurrence of the + specified substring, starting at the specified index. + + If str doesn't include any character, always -1 is + returned. This is also the case, if both strings are empty. + + @since LibreOffice 4.0 + + @param str the substring to search for. + @param fromIndex the index to start the search from. + @return If the string argument occurs one or more times as a substring + within this string at the starting index, then the index + of the first character of the first such substring is + returned. If it does not occur as a substring starting + at fromIndex or beyond, -1 is returned. + */ +#if defined LIBO_INTERNAL_ONLY + sal_Int32 indexOf( std::u16string_view str, sal_Int32 fromIndex = 0 ) const + { + assert( fromIndex >= 0 && fromIndex <= pData->length ); + sal_Int32 ret = rtl_ustr_indexOfStr_WithLength( pData->buffer+fromIndex, pData->length-fromIndex, + str.data(), str.length() ); + return (ret < 0 ? ret : ret+fromIndex); + } +#else + sal_Int32 indexOf( const OUString & str, sal_Int32 fromIndex = 0 ) const + { + assert( fromIndex >= 0 && fromIndex <= pData->length ); + sal_Int32 ret = rtl_ustr_indexOfStr_WithLength( pData->buffer+fromIndex, pData->length-fromIndex, + str.pData->buffer, str.pData->length ); + return (ret < 0 ? ret : ret+fromIndex); + } +#endif + + /** + @overload + This function accepts an ASCII string literal as its argument. + + @since LibreOffice 4.0 + */ + template< typename T > + typename libreoffice_internal::ConstCharArrayDetector< T, sal_Int32 >::Type indexOf( T& literal, sal_Int32 fromIndex = 0 ) const + { + assert( + libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal)); + sal_Int32 n = rtl_ustr_indexOfAscii_WithLength( + pData->buffer + fromIndex, pData->length - fromIndex, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + return n < 0 ? n : n + fromIndex; + } + +#if defined LIBO_INTERNAL_ONLY + /** @overload @since LibreOffice 5.3 */ + template<typename T> + typename + libreoffice_internal::ConstCharArrayDetector<T, sal_Int32>::TypeUtf16 + indexOf(T & literal, sal_Int32 fromIndex = 0) const { + assert(fromIndex >= 0); + auto n = rtl_ustr_indexOfStr_WithLength( + pData->buffer + fromIndex, pData->length - fromIndex, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + return n < 0 ? n : n + fromIndex; + } +#endif + + /** + Returns the index within this string of the last occurrence of + the specified substring, searching backward starting at the end. + + The returned index indicates the starting index of the substring + in this string. + If str doesn't include any character, always -1 is + returned. This is also the case, if both strings are empty. + + @since LibreOffice 4.0 + + @param str the substring to search for. + @return If the string argument occurs one or more times as a substring + within this string, then the index of the first character of + the last such substring is returned. If it does not occur as + a substring, -1 is returned. + */ +#if defined LIBO_INTERNAL_ONLY + sal_Int32 lastIndexOf( std::u16string_view str ) const + { + return rtl_ustr_lastIndexOfStr_WithLength( pData->buffer, pData->length, + str.data(), str.length() ); + } +#else + sal_Int32 lastIndexOf( const OUString & str ) const + { + return rtl_ustr_lastIndexOfStr_WithLength( pData->buffer, pData->length, + str.pData->buffer, str.pData->length ); + } +#endif + + /** + Returns the index within this string of the last occurrence of + the specified substring, searching backward starting before the specified + index. + + The returned index indicates the starting index of the substring + in this string. + If str doesn't include any character, always -1 is + returned. This is also the case, if both strings are empty. + + @since LibreOffice 4.0 + + @param str the substring to search for. + @param fromIndex the index before which to start the search. + @return If the string argument occurs one or more times as a substring + within this string before the starting index, then the index + of the first character of the last such substring is + returned. Otherwise, -1 is returned. + */ +#if defined LIBO_INTERNAL_ONLY + sal_Int32 lastIndexOf( std::u16string_view str, sal_Int32 fromIndex ) const + { + assert( fromIndex >= 0 && fromIndex <= pData->length ); + return rtl_ustr_lastIndexOfStr_WithLength( pData->buffer, fromIndex, + str.data(), str.length() ); + } +#else + sal_Int32 lastIndexOf( const OUString & str, sal_Int32 fromIndex ) const + { + assert( fromIndex >= 0 && fromIndex <= pData->length ); + return rtl_ustr_lastIndexOfStr_WithLength( pData->buffer, fromIndex, + str.pData->buffer, str.pData->length ); + } +#endif + + /** + @overload + This function accepts an ASCII string literal as its argument. + @since LibreOffice 4.0 + */ + template< typename T > + typename libreoffice_internal::ConstCharArrayDetector< T, sal_Int32 >::Type lastIndexOf( T& literal ) const + { + assert( + libreoffice_internal::ConstCharArrayDetector<T>::isValid(literal)); + return rtl_ustr_lastIndexOfAscii_WithLength( + pData->buffer, pData->length, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + } + +#if defined LIBO_INTERNAL_ONLY + /** @overload @since LibreOffice 5.3 */ + template<typename T> + typename + libreoffice_internal::ConstCharArrayDetector<T, sal_Int32>::TypeUtf16 + lastIndexOf(T & literal) const { + return rtl_ustr_lastIndexOfStr_WithLength( + pData->buffer, pData->length, + libreoffice_internal::ConstCharArrayDetector<T>::toPointer(literal), + libreoffice_internal::ConstCharArrayDetector<T>::length); + } +#endif + + /** + Strip the given character from the start of the buffer. + + @since LibreOffice 4.0 + + @param c the character to strip + @return The number of characters stripped + + */ + sal_Int32 stripStart(sal_Unicode c = ' ') + { + sal_Int32 index; + for(index = 0; index < getLength() ; index++) + { + if(pData->buffer[ index ] != c) + { + break; + } + } + if(index) + { + remove(0, index); + } + return index; + } + + /** + Strip the given character from the end of the buffer. + + @since LibreOffice 4.0 + + @param c the character to strip + @return The number of characters stripped + + */ + sal_Int32 stripEnd(sal_Unicode c = ' ') + { + sal_Int32 result = getLength(); + sal_Int32 index; + for(index = getLength(); index > 0 ; index--) + { + if(pData->buffer[ index - 1 ] != c) + { + break; + } + } + if(index < getLength()) + { + truncate(index); + } + return result - getLength(); + } + /** + Strip the given character from the both end of the buffer. + + @since LibreOffice 4.0 + + @param c the character to strip + @return The number of characters stripped + + */ + sal_Int32 strip(sal_Unicode c = ' ') + { + return stripStart(c) + stripEnd(c); + } + +#if defined LIBO_INTERNAL_ONLY + /** + Returns a std::u16string_view that is a view of a substring of this string. + + The substring begins at the specified beginIndex. If + beginIndex is negative or be greater than the length of + this string, behaviour is undefined. + + @param beginIndex the beginning index, inclusive. + @return the specified substring. + */ + SAL_WARN_UNUSED_RESULT std::u16string_view subView( sal_Int32 beginIndex ) const + { + assert(beginIndex >= 0); + assert(beginIndex <= getLength()); + return subView(beginIndex, getLength() - beginIndex); + } + + /** + Returns a std::u16string_view that is a view of a substring of this string. + + The substring begins at the specified beginIndex and contains count + characters. If either beginIndex or count are negative, + or beginIndex + count are greater than the length of this string + then behaviour is undefined. + + @param beginIndex the beginning index, inclusive. + @param count the number of characters. + @return the specified substring. + */ + SAL_WARN_UNUSED_RESULT std::u16string_view subView( sal_Int32 beginIndex, sal_Int32 count ) const + { + assert(beginIndex >= 0); + assert(count >= 0); + assert(beginIndex <= getLength()); + assert(count <= getLength() - beginIndex); + return std::u16string_view(pData->buffer, sal_uInt32(pData->length)).substr(beginIndex, count); + } +#endif + + /** + Returns a new string buffer that is a substring of this string. + + The substring begins at the specified beginIndex. If + beginIndex is negative or be greater than the length of + this string, behaviour is undefined. + + @param beginIndex the beginning index, inclusive. + @return the specified substring. + @since LibreOffice 4.1 + */ + OUStringBuffer copy( sal_Int32 beginIndex ) const + { + return copy( beginIndex, getLength() - beginIndex ); + } + + /** + Returns a new string buffer that is a substring of this string. + + The substring begins at the specified beginIndex and contains count + characters. If either beginIndex or count are negative, + or beginIndex + count are greater than the length of this string + then behaviour is undefined. + + @param beginIndex the beginning index, inclusive. + @param count the number of characters. + @return the specified substring. + @since LibreOffice 4.1 + */ + OUStringBuffer copy( sal_Int32 beginIndex, sal_Int32 count ) const + { + assert(beginIndex >= 0 && beginIndex <= getLength()); + assert(count >= 0 && count <= getLength() - beginIndex); + rtl_uString *pNew = NULL; + rtl_uStringbuffer_newFromStr_WithLength( &pNew, getStr() + beginIndex, count ); + return OUStringBuffer( pNew, count + 16 ); + } + +private: + OUStringBuffer( rtl_uString * value, const sal_Int32 capacity ) + { + pData = value; + nCapacity = capacity; + } + + /** + A pointer to the data structure which contains the data. + */ + rtl_uString * pData; + + /** + The len of the pData->buffer. + */ + sal_Int32 nCapacity; +}; + +#if defined LIBO_INTERNAL_ONLY +template<> struct ToStringHelper<OUStringBuffer> { + static std::size_t length(OUStringBuffer const & s) { return s.getLength(); } + + static sal_Unicode * addData(sal_Unicode * buffer, OUStringBuffer const & s) SAL_RETURNS_NONNULL + { return addDataHelper(buffer, s.getStr(), s.getLength()); } + + static constexpr bool allowOStringConcat = false; + static constexpr bool allowOUStringConcat = true; +}; +#endif + +#if defined LIBO_INTERNAL_ONLY + // Define this here to avoid circular includes + inline OUString & OUString::operator+=( const OUStringBuffer & str ) & + { + // Call operator= if this is empty, otherwise rtl_uString_newConcat will attempt to + // acquire() the str.pData buffer, which is part of the OUStringBuffer mutable state. + if (isEmpty()) + return operator=(str.toString()); + else + return internalAppend(str.pData); + } + + inline OUString const& OUString::unacquired(const OUStringBuffer& str) + { + return unacquired(&str.pData); + } +#endif +} + +#ifdef RTL_STRING_UNITTEST +namespace rtl +{ +typedef rtlunittest::OUStringBuffer OUStringBuffer; +} +#endif + +#if defined LIBO_INTERNAL_ONLY && !defined RTL_STRING_UNITTEST +using ::rtl::OUStringBuffer; +#endif + +#endif // INCLUDED_RTL_USTRBUF_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |