string revision 44d38f3d1ae0fd02030e259c4f93a265f91e96fc
1fe47ae56a8808c836923466e44704db3a8371593Niko Catania/* -*- c++ -*- */ 2fe47ae56a8808c836923466e44704db3a8371593Niko Catania/* 3fe47ae56a8808c836923466e44704db3a8371593Niko Catania * Copyright (C) 2009 The Android Open Source Project 4fe47ae56a8808c836923466e44704db3a8371593Niko Catania * All rights reserved. 5fe47ae56a8808c836923466e44704db3a8371593Niko Catania * 6fe47ae56a8808c836923466e44704db3a8371593Niko Catania * Redistribution and use in source and binary forms, with or without 7fe47ae56a8808c836923466e44704db3a8371593Niko Catania * modification, are permitted provided that the following conditions 8fe47ae56a8808c836923466e44704db3a8371593Niko Catania * are met: 9fe47ae56a8808c836923466e44704db3a8371593Niko Catania * * Redistributions of source code must retain the above copyright 10fe47ae56a8808c836923466e44704db3a8371593Niko Catania * notice, this list of conditions and the following disclaimer. 11fe47ae56a8808c836923466e44704db3a8371593Niko Catania * * Redistributions in binary form must reproduce the above copyright 12fe47ae56a8808c836923466e44704db3a8371593Niko Catania * notice, this list of conditions and the following disclaimer in 13fe47ae56a8808c836923466e44704db3a8371593Niko Catania * the documentation and/or other materials provided with the 14fe47ae56a8808c836923466e44704db3a8371593Niko Catania * distribution. 15fe47ae56a8808c836923466e44704db3a8371593Niko Catania * 16fe47ae56a8808c836923466e44704db3a8371593Niko Catania * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17fe47ae56a8808c836923466e44704db3a8371593Niko Catania * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18fe47ae56a8808c836923466e44704db3a8371593Niko Catania * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 19fe47ae56a8808c836923466e44704db3a8371593Niko Catania * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 20fe47ae56a8808c836923466e44704db3a8371593Niko Catania * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21fe47ae56a8808c836923466e44704db3a8371593Niko Catania * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 22fe47ae56a8808c836923466e44704db3a8371593Niko Catania * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 23fe47ae56a8808c836923466e44704db3a8371593Niko Catania * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 24fe47ae56a8808c836923466e44704db3a8371593Niko Catania * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25fe47ae56a8808c836923466e44704db3a8371593Niko Catania * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26fe47ae56a8808c836923466e44704db3a8371593Niko Catania * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27fe47ae56a8808c836923466e44704db3a8371593Niko Catania * SUCH DAMAGE. 28fe47ae56a8808c836923466e44704db3a8371593Niko Catania */ 29fe47ae56a8808c836923466e44704db3a8371593Niko Catania 30fe47ae56a8808c836923466e44704db3a8371593Niko Catania#ifndef ANDROID_ASTL_STRING__ 31fe47ae56a8808c836923466e44704db3a8371593Niko Catania#define ANDROID_ASTL_STRING__ 32fe47ae56a8808c836923466e44704db3a8371593Niko Catania 33fe47ae56a8808c836923466e44704db3a8371593Niko Catania#include <cstddef> 3491ea6c037471a1acd97b03c3097223777906f748Nicolas Catania#include <iterator> 35f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania#include <char_traits.h> 36fe47ae56a8808c836923466e44704db3a8371593Niko Catania 37fe47ae56a8808c836923466e44704db3a8371593Niko Catanianamespace std { 38fe47ae56a8808c836923466e44704db3a8371593Niko Catania 3944d38f3d1ae0fd02030e259c4f93a265f91e96fcNicolas Cataniaclass ostream; 4044d38f3d1ae0fd02030e259c4f93a265f91e96fcNicolas Catania 41fe47ae56a8808c836923466e44704db3a8371593Niko Catania// Simple string implementation. Its purpose is to be able to compile code that 42fe47ae56a8808c836923466e44704db3a8371593Niko Catania// uses the STL and requires std::string. 43fe47ae56a8808c836923466e44704db3a8371593Niko Catania// 44fe47ae56a8808c836923466e44704db3a8371593Niko Catania// IMPORTANT: 45fe47ae56a8808c836923466e44704db3a8371593Niko Catania// . This class it is not fully STL compliant. Some constructors/methods maybe 46fe47ae56a8808c836923466e44704db3a8371593Niko Catania// missing, they will be added on demand. 47fe47ae56a8808c836923466e44704db3a8371593Niko Catania// . We don't provide a std::basic_string template that std::string extends 48fe47ae56a8808c836923466e44704db3a8371593Niko Catania// because we use only char (wchar is not supported on Android). 49fe47ae56a8808c836923466e44704db3a8371593Niko Catania// . The memory allocation scheme uses the heap. Since Android has the concept 50fe47ae56a8808c836923466e44704db3a8371593Niko Catania// of SharedBuffer, we may, in the future, templatize this class and add an 51fe47ae56a8808c836923466e44704db3a8371593Niko Catania// allocation parameter. 52fe47ae56a8808c836923466e44704db3a8371593Niko Catania// . The implementation is not optimized in any way (no copy on write support), 53fe47ae56a8808c836923466e44704db3a8371593Niko Catania// temporary instance may be expensive. 5491ea6c037471a1acd97b03c3097223777906f748Nicolas Catania// . Currently there is limited support for iterators. 55d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania// 56fe47ae56a8808c836923466e44704db3a8371593Niko Catania 57fe47ae56a8808c836923466e44704db3a8371593Niko Cataniaclass string 58fe47ae56a8808c836923466e44704db3a8371593Niko Catania{ 59fe47ae56a8808c836923466e44704db3a8371593Niko Catania public: 60743c6a2694bf16bf29d516c906363199a7bccf86Nicolas Catania typedef char_traits<char> traits_type; 61f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef traits_type::char_type value_type; 62f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef size_t size_type; 63f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef ptrdiff_t difference_type; 64f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef value_type& reference; 65f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef const value_type& const_reference; 66f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef value_type* pointer; 67f31fdb2e57186a552855e27f55036369ec1c279aNicolas Catania typedef const value_type* const_pointer; 6891ea6c037471a1acd97b03c3097223777906f748Nicolas Catania typedef __wrapper_iterator<pointer,string> iterator; 6991ea6c037471a1acd97b03c3097223777906f748Nicolas Catania typedef __wrapper_iterator<const_pointer,string> const_iterator; 70fe47ae56a8808c836923466e44704db3a8371593Niko Catania 717618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania static const size_type npos = static_cast<size_type>(-1); 72fe47ae56a8808c836923466e44704db3a8371593Niko Catania 73fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Constructors 74fe47ae56a8808c836923466e44704db3a8371593Niko Catania string(); 75fe47ae56a8808c836923466e44704db3a8371593Niko Catania 76fe47ae56a8808c836923466e44704db3a8371593Niko Catania string(const string& str); 77fe47ae56a8808c836923466e44704db3a8371593Niko Catania 78fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Construct a string from a source's substring. 79fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param str The source string. 80d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param pos The index of the character to start the copy at. 81d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param n The number of characters to copy. Use string::npos for the 82fe47ae56a8808c836923466e44704db3a8371593Niko Catania // remainder. 83d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string(const string& str, size_t pos, size_type n); 84fe47ae56a8808c836923466e44704db3a8371593Niko Catania 85d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // Same as above but implicitly copy from pos to the end of the str. 86d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string(const string& str, size_type pos); 87fe47ae56a8808c836923466e44704db3a8371593Niko Catania 88fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Construct a string from a C string. 89fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param str The source string, must be '\0' terminated. 907618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania string(const value_type *str); 91fe47ae56a8808c836923466e44704db3a8371593Niko Catania 92fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Construct a string from a char array. 93fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param str The source C string. '\0' are ignored. 94d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param n The number of characters to copy. 95d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string(const value_type *str, size_type n); 96fe47ae56a8808c836923466e44704db3a8371593Niko Catania 97fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Construct a string from a repetition of a character. 98d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param n The number of characters. 99fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param c The character to use. 100d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string(size_t n, char c); 101fe47ae56a8808c836923466e44704db3a8371593Niko Catania 102fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Construct a string from a char array. 103fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param begin The start of the source C string. '\0' are ignored. 104fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param end The end of source C string. Points just pass the last 105fe47ae56a8808c836923466e44704db3a8371593Niko Catania // character. 1067618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania string(const value_type *begin, const value_type *end); 107fe47ae56a8808c836923466e44704db3a8371593Niko Catania 108fe47ae56a8808c836923466e44704db3a8371593Niko Catania ~string(); 109fe47ae56a8808c836923466e44704db3a8371593Niko Catania 110fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return The number of characters in the string, not including any 111fe47ae56a8808c836923466e44704db3a8371593Niko Catania // null-termination. 1127618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania size_type length() const { return mLength; } 1137618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania size_type size() const { return mLength; } 114fe47ae56a8808c836923466e44704db3a8371593Niko Catania 115fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return A pointer to null-terminated contents. 1167618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania const value_type *c_str() const { return mData; } 1177618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania const value_type *data() const { return mData; } 118fe47ae56a8808c836923466e44704db3a8371593Niko Catania 11960fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // Empty the string on return. Release the internal buffer. Length 12060fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // and capacity are both 0 on return. If you want to keep the 12160fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // internal buffer around for reuse, call 'erase' instead. 122fe47ae56a8808c836923466e44704db3a8371593Niko Catania void clear(); 123fe47ae56a8808c836923466e44704db3a8371593Niko Catania 124fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return true if the string is empty. 125fe47ae56a8808c836923466e44704db3a8371593Niko Catania bool empty() const { return this->size() == 0; } 126fe47ae56a8808c836923466e44704db3a8371593Niko Catania 12760fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // Remove 'len' characters from the string starting at 'pos'. The 12860fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // string length is reduced by 'len'. If len is greater or equal 12960fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // to the number of characters in the string, it is truncated at 13060fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // 'pos'. If 'pos' is beyond the end of the string, 'erase' does 13160fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // nothing. Note, regular STL implementations throw a out_of_range 13260fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // exception in this case. 13360fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // Internally, the capacity of the buffer remains unchanged. If 13460fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // you wanted to recover the deleted chars' memory you should call 13560fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // 'reserve' explicitly (see also 'clear'). 13660fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // @param pos Index of the first character to remove (default to 0) 137d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param n Number of characters to delete. (default to remainder) 13860fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // @return a reference to this string. 139d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string& erase(size_type pos = 0, size_type n = npos); 14060fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania 141fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param str The string to be append. 142fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return A reference to this string. 143fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& operator+=(const string& str) { return this->append(str); } 144fe47ae56a8808c836923466e44704db3a8371593Niko Catania 145fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param str The C string to be append. 146fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return A reference to this string. 1477618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania string& operator+=(const value_type *str) { return this->append(str); } 148fe47ae56a8808c836923466e44704db3a8371593Niko Catania 149fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param c A character to be append. 150fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return A reference to this string. 151fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& operator+=(const char c) { this->push_back(c); return *this; } 152fe47ae56a8808c836923466e44704db3a8371593Niko Catania 153fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param c A character to be append. 154fe47ae56a8808c836923466e44704db3a8371593Niko Catania void push_back(const char c); 155fe47ae56a8808c836923466e44704db3a8371593Niko Catania 156fe47ae56a8808c836923466e44704db3a8371593Niko Catania // no-op if str is NULL. 1577618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania string& append(const value_type *str); 158d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // no-op if str is NULL. n must be >= 0. 159d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string& append(const value_type *str, size_type n); 160d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // no-op if str is NULL. pos and n must be >= 0. 161d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string& append(const value_type *str, size_type pos, size_type n); 162fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& append(const string& str); 163fe47ae56a8808c836923466e44704db3a8371593Niko Catania 16460fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // Comparison. 165fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return 0 if this==other, < 0 if this < other and > 0 if this > other. 166fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Don't assume the values are -1, 0, 1 167fe47ae56a8808c836923466e44704db3a8371593Niko Catania int compare(const string& other) const; 1687618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania int compare(const value_type *other) const; 169fe47ae56a8808c836923466e44704db3a8371593Niko Catania 170fe47ae56a8808c836923466e44704db3a8371593Niko Catania friend bool operator==(const string& left, const string& right); 1717618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania friend bool operator==(const string& left, const value_type *right); 1727618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania friend bool operator==(const value_type *left, const string& right) { return right == left; } 173fe47ae56a8808c836923466e44704db3a8371593Niko Catania friend bool operator!=(const string& left, const string& right) { return !(left == right); } 174fe47ae56a8808c836923466e44704db3a8371593Niko Catania friend bool operator!=(const string& left, const char* right) { return !(left == right); } 1757618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania friend bool operator!=(const value_type *left, const string& right) { return !(left == right); } 176fe47ae56a8808c836923466e44704db3a8371593Niko Catania 177fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return Number of elements for which memory has been allocated. capacity >= size(). 1787618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania size_type capacity() const { return mCapacity; } 179fe47ae56a8808c836923466e44704db3a8371593Niko Catania 180d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // Change the capacity to new_size. No effect if new_size < size(). 181d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // 0 means Shrink to fit. 182fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param new_size number of character to be allocated. 1837618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania void reserve(size_type new_size = 0); 184fe47ae56a8808c836923466e44704db3a8371593Niko Catania 185fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Exchange the content of this with the content of other. 186fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param other Instance to swap this one with. 187fe47ae56a8808c836923466e44704db3a8371593Niko Catania void swap(string& other); 188fe47ae56a8808c836923466e44704db3a8371593Niko Catania 189fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Accessors. 190d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param pos of the char. No boundary, signed checks are done. 191fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return a const reference to the char. 192d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania const char& operator[](const size_type pos) const; 193d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania 194d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param pos of the char. No boundary, signed checks are done. 195fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @return a reference to the char. 196d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania char& operator[](const size_type pos); 197fe47ae56a8808c836923466e44704db3a8371593Niko Catania 19874a6fdea77d52a17be4bc38831fe02a31cefbf34Nicolas Catania // 'at' is similar to operator[] except that it does check bounds. 19974a6fdea77d52a17be4bc38831fe02a31cefbf34Nicolas Catania const char& at(const size_type pos) const; 20074a6fdea77d52a17be4bc38831fe02a31cefbf34Nicolas Catania char& at(const size_type pos); 20174a6fdea77d52a17be4bc38831fe02a31cefbf34Nicolas Catania 202fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Assignments. 203fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& operator=(const string& str) { return assign(str); } 204fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& operator=(const char* str) { return assign(str); } 205fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& operator=(char c); 206fe47ae56a8808c836923466e44704db3a8371593Niko Catania 207fe47ae56a8808c836923466e44704db3a8371593Niko Catania string& assign(const string& str); 208d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // Assign a substring of the original. 209fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param str Original string. 210fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param pos Index of the start of the copy. 211d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param n Number of character to be copied. 212d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania string& assign(const string& str, size_type pos, size_type n); 2137618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania string& assign(const value_type *str); 214d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania 215d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // Assign a non-nul terminated array of chars. 216d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania // @param array Of chars non-nul terminated. 217fe47ae56a8808c836923466e44704db3a8371593Niko Catania // @param len Length of the array. 2187618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania string& assign(const value_type *array, size_type len); 219fe47ae56a8808c836923466e44704db3a8371593Niko Catania 220fe47ae56a8808c836923466e44704db3a8371593Niko Catania // Concat. Prefer using += or append. 22160fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // Uses unnamed object for return value optimization. 222fe47ae56a8808c836923466e44704db3a8371593Niko Catania friend string operator+(const string& left, const string& right) { 223fe47ae56a8808c836923466e44704db3a8371593Niko Catania return string(left).append(right); 224fe47ae56a8808c836923466e44704db3a8371593Niko Catania } 2257618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania friend string operator+(const string& left, const value_type *right) { 226fe47ae56a8808c836923466e44704db3a8371593Niko Catania return string(left).append(right); 227fe47ae56a8808c836923466e44704db3a8371593Niko Catania } 2287618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania friend string operator+(const value_type *left, const string& right) { 229fe47ae56a8808c836923466e44704db3a8371593Niko Catania return string(left).append(right); 230fe47ae56a8808c836923466e44704db3a8371593Niko Catania } 231fe47ae56a8808c836923466e44704db3a8371593Niko Catania friend string operator+(const string& left, char right) { 232fe47ae56a8808c836923466e44704db3a8371593Niko Catania return string(left).operator+=(right); 233fe47ae56a8808c836923466e44704db3a8371593Niko Catania } 234fe47ae56a8808c836923466e44704db3a8371593Niko Catania friend string operator+(char left, const string& right) { 235fe47ae56a8808c836923466e44704db3a8371593Niko Catania return string(&left, 1).append(right); 236fe47ae56a8808c836923466e44704db3a8371593Niko Catania } 237fe47ae56a8808c836923466e44704db3a8371593Niko Catania 238d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // Find the position of a sub-string. The empty string is always 239d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // found at the requested position except when it's beyond the 240d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // string's end. 241d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // @param str String to locate. 242d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // @param pos Index of the character to search from. Default to 0. 24360fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // @return Index of start of the first occurrence of the 24460fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // string. string::npos if no occurrence of str was found from the 245d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // starting position. 246d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania size_type find(const string& str, size_type pos = 0) const { 24760fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania return find(str.mData, pos); 248d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania } 249d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania 250d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // Find the position of a C sub-string. The empty string is always 251d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // found at the requested position except when it's beyond the 252d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // string's end. 253d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // @param str C string to locate. 254d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // @param pos Index of the character to search from. Default to 0. 25560fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // @return Index of start of the first occurrence of the 25660fd0f758a63e74980d712a13c91bc24d98cedc6Nicolas Catania // string. string::npos if no occurrence of str was found from the 257d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania // starting position. 2587618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania size_type find(const value_type *str, size_type pos = 0) const; 259d738d268c8f915bde451bba52e0c3996113ba9f0Nicolas Catania 26091ea6c037471a1acd97b03c3097223777906f748Nicolas Catania // Iterators 26191ea6c037471a1acd97b03c3097223777906f748Nicolas Catania iterator begin() {return iterator(mData);} 26291ea6c037471a1acd97b03c3097223777906f748Nicolas Catania const_iterator begin() const {return const_iterator(mData);} 26391ea6c037471a1acd97b03c3097223777906f748Nicolas Catania iterator end() {return iterator(mData + mLength);} 26491ea6c037471a1acd97b03c3097223777906f748Nicolas Catania const_iterator end() const {return const_iterator(mData + mLength);} 26591ea6c037471a1acd97b03c3097223777906f748Nicolas Catania 266fe47ae56a8808c836923466e44704db3a8371593Niko Catania private: 267d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania bool SafeMalloc(size_type n); 268d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania void SafeRealloc(size_type n); 2697618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania void SafeFree(value_type *str); 2707618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania void ResetTo(value_type *str); 271fe47ae56a8808c836923466e44704db3a8371593Niko Catania void ConstructEmptyString(); 272d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania void Constructor(const value_type *str, size_type n); 273d881e3f36a074eb9fd8e353fb5e5e3e539f2d460Nicolas Catania void Constructor(const value_type *str, size_type pos, size_type n); 2747618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania void Constructor(size_type num, char c); 275fe47ae56a8808c836923466e44704db3a8371593Niko Catania void DeleteSafe(); 2767618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania void Append(const value_type *str, size_type len); 277fe47ae56a8808c836923466e44704db3a8371593Niko Catania 2787618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania value_type *mData; // pointer to the buffer 2797618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania size_type mCapacity; // size of the buffer. 2807618d7b9a011b1158ef868d6ae3ead242ddaccacNicolas Catania size_type mLength; // len of the string excl. null-terminator. 281fe47ae56a8808c836923466e44704db3a8371593Niko Catania}; 282fe47ae56a8808c836923466e44704db3a8371593Niko Catania 28344d38f3d1ae0fd02030e259c4f93a265f91e96fcNicolas Catania// I/O 28444d38f3d1ae0fd02030e259c4f93a265f91e96fcNicolas Cataniaostream& operator<<(ostream& os, const string& str); 28544d38f3d1ae0fd02030e259c4f93a265f91e96fcNicolas Catania 286fe47ae56a8808c836923466e44704db3a8371593Niko Catania} // namespace std 287fe47ae56a8808c836923466e44704db3a8371593Niko Catania 288fe47ae56a8808c836923466e44704db3a8371593Niko Catania#endif // ANDROID_ASTL_STRING__ 289