00001 // 00002 // aegis - project change supervisor 00003 // Copyright (C) 2004-2006, 2008 Peter Miller 00004 // 00005 // This program is free software; you can redistribute it and/or modify 00006 // it under the terms of the GNU General Public License as published by 00007 // the Free Software Foundation; either version 3 of the License, or 00008 // (at your option) any later version. 00009 // 00010 // This program is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 // GNU General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with this program. If not, see 00017 // <http://www.gnu.org/licenses/>. 00018 // 00019 00020 #ifndef COMMON_NSTRING_ACCUMULATOR_H 00021 #define COMMON_NSTRING_ACCUMULATOR_H 00022 00023 #include <common/nstring.h> 00024 00034 class nstring_accumulator 00035 { 00036 public: 00041 ~nstring_accumulator(); 00042 00046 nstring_accumulator(); 00047 00051 nstring_accumulator(const nstring_accumulator &); 00052 00056 nstring_accumulator &operator=(const nstring_accumulator &); 00057 00062 nstring mkstr() const; 00063 00071 void 00072 push_back(char c) 00073 { 00074 // 00075 // The nstring_accumulator::push_back(char) method shows up 00076 // in the profiles as occupying 10% of the time it takes to 00077 // parse the database files. By making it an inline, things go 00078 // measurably faster. 00079 // 00080 if (length < maximum) 00081 buffer[length++] = c; 00082 else 00083 overflow(c); 00084 } 00085 00095 void push_back(const char *data, size_t len); 00096 00104 void push_back(const char *data); 00105 00113 void push_back(const nstring_accumulator &data); 00114 00122 void push_back(const nstring &data); 00123 00128 void clear() { length = 0; } 00129 00134 size_t size() const { return length; } 00135 00140 bool empty() const { return (length == 0); } 00141 00146 void pop_back() { if (length) --length; } 00147 00152 char back() { return (length ? buffer[length - 1] : 0); } 00153 00164 const char *get_data() const { return (buffer ? buffer : ""); } 00165 00174 char operator[](size_t n) { return buffer[n]; } 00175 00176 private: 00185 void overflow(char c); 00186 00191 size_t length; 00192 00197 size_t maximum; 00198 00203 char *buffer; 00204 }; 00205 00206 00208 #endif // COMMON_NSTRING_ACCUMULATOR_H
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