string_utils.h

   1 /*
   2 Project: J-Ben
   3 Author:  Paul Goins
   4 Website: http://www.vultaire.net/software/jben/
   5 License: GNU General Public License (GPL) version 2
   6          (http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt)
   7
   8 File: string_utils.h
   9
  10 This program is free software; you can redistribute it and/or modify
  11 it under the terms of the GNU General Public License as published by
  12 the Free Software Foundation; either version 2 of the License, or
  13 (at your option) any later version.
  14
  15 This program is distributed in the hope that it will be useful,
  16 but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 GNU General Public License for more details.
  19
  20 You should have received a copy of the GNU General Public License
  21 along with this program.  If not, see <http://www.gnu.org/licenses/>
  22 */
  23
  24 #ifndef string_utils_h
  25 #define string_utils_h
  26
  27 #include <string>
  28 #include <list>
  29 using namespace std;
  30
  31 bool GetIndexAfterParens(const string& s, size_t indexParen, size_t& indexNext,
  32                                                  char cOpenParen='(', char cCloseParen=')');
  33 bool GetIndexBeforeParens(const string& s, size_t indexParen, size_t& indexNext,
  34                                                   char cOpenParen='(', char cCloseParen=')');
  35 string ToUpper(string src);
  36 wstring ToUpper(wstring src);
  37 string ToLower(string src);
  38 wstring ToLower(wstring src);
  39 string Trim(string);
  40 wstring Trim(wstring);
  41
  42 /* Template functions */
  43 template <class t>
  44 list< basic_string<t> > StrTokenize
  45 (const basic_string<t>& src,
  46  const t *delimiters,
  47  bool emptyTokens = false,
  48  size_t maxTokens=0) {
  49         list< basic_string<t> > l;
  50         size_t start = 0;
  51         size_t end = src.find_first_of(delimiters, start);
  52
  53         while(end!=basic_string<t>::npos
  54                   && (maxTokens==0 || l.size()<maxTokens-1)) {
  55                 if(emptyTokens || (start!=end)) {
  56                         l.push_back(
  57                                 src.substr(start, end-start));
  58                 }
  59                 start = end + 1;
  60                 end = src.find(delimiters, start);
  61         }
  62
  63         if(start!=basic_string<t>::npos) {
  64                 basic_string<t> lastStr = src.substr(start);
  65                 if(lastStr.length()>0) l.push_back(lastStr);
  66         }
  67         return l;
  68 }
  69
  70 /* Substring replace function.
  71    "from" string MUST have length > 0. */
  72 template <class t>
  73 basic_string<t> TextReplace(const basic_string<t>& src,
  74                                                         const basic_string<t>& from,
  75                                                         const basic_string<t>& to) {
  76         basic_string<t> result;
  77         size_t start=0;
  78         size_t end;
  79         if(from.size()<1) return src;
  80
  81         end = src.find(from, start);
  82         while(end!=basic_string<t>::npos) {
  83                 /* Append string particle, if present */
  84                 if(start!=end) {
  85                         result.append(src.substr(start, end-start));
  86                 }
  87                 /* Append "to" string */
  88                 result.append(to);
  89                 /* Skip over the "from" string */
  90                 start = end + from.length();
  91
  92                 end = src.find(from, start);
  93         }
  94
  95         if(start!=basic_string<t>::npos) {
  96                 basic_string<t> lastStr = src.substr(start);
  97                 if(lastStr.length()>0) result.append(lastStr);
  98         }
  99
 100         return result;
 101 }
 102
 103 /* t must be a class based upon std::basic_string, like string or wstring. */
 104 template <class t>
 105 t ListToString(const list<t>& l, const t& separator) {
 106         t target;
 107
 108         /* Append the first entry */
 109         typename list<t>::const_iterator li = l.begin();
 110         if(li!=l.end()) target.append(*li);
 111
 112         /* Append remaining entries */
 113         for(li++; li!=l.end(); li++) {
 114                 target.append(separator);
 115                 target.append(*li);
 116         }
 117
 118         return target;
 119 }
 120
 121 #endif