1 /* 2 Minetest 3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com> 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as published by 7 the Free Software Foundation; either version 2.1 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License along 16 with this program; if not, write to the Free Software Foundation, Inc., 17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 */ 19 20 #pragma once 21 22 #include <string> 23 24 template <typename T> 25 class BasicStrfnd { 26 typedef std::basic_string<T> String; 27 String str; 28 size_t pos; 29 public: BasicStrfnd(const String & s)30 BasicStrfnd(const String &s) : str(s), pos(0) {} start(const String & s)31 void start(const String &s) { str = s; pos = 0; } where()32 size_t where() { return pos; } to(size_t i)33 void to(size_t i) { pos = i; } at_end()34 bool at_end() { return pos >= str.size(); } what()35 String what() { return str; } 36 next(const String & sep)37 String next(const String &sep) 38 { 39 if (pos >= str.size()) 40 return String(); 41 42 size_t n; 43 if (sep.empty() || (n = str.find(sep, pos)) == String::npos) { 44 n = str.size(); 45 } 46 String ret = str.substr(pos, n - pos); 47 pos = n + sep.size(); 48 return ret; 49 } 50 51 // Returns substr up to the next occurence of sep that isn't escaped with esc ('\\') 52 String next_esc(const String &sep, T esc=static_cast<T>('\\')) 53 { 54 if (pos >= str.size()) 55 return String(); 56 57 size_t n, old_p = pos; 58 do { 59 if (sep.empty() || (n = str.find(sep, pos)) == String::npos) { 60 pos = n = str.size(); 61 break; 62 } 63 pos = n + sep.length(); 64 } while (n > 0 && str[n - 1] == esc); 65 66 return str.substr(old_p, n - old_p); 67 } 68 skip_over(const String & chars)69 void skip_over(const String &chars) 70 { 71 size_t p = str.find_first_not_of(chars, pos); 72 if (p != String::npos) 73 pos = p; 74 } 75 }; 76 77 typedef BasicStrfnd<char> Strfnd; 78 typedef BasicStrfnd<wchar_t> WStrfnd; 79