source/StringTokenizer.C

   1 // StringTokenizer.C  -*- C++ -*-
   2 // Copyright (c) 1997, 1998 Etienne BERNARD
   3 // Copyright (c) 2005 Clinton Ebadi
   4
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 2 of the License, or
   8 // 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 General Public License for more details.
  14
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
  18
  19 #include "StringTokenizer.H"
  20 #include <string>
  21 #include <cstring>
  22
  23 StringTokenizer::StringTokenizer(std::string s)
  24   : st(s), pos(0)
  25 { }
  26
  27 bool
  28 StringTokenizer::more_tokens_p ()
  29 {
  30   if (pos == st.length())
  31     return false;
  32
  33   for (std::string::size_type i = pos; i < st.length(); i++)
  34     if (st[i] != ' ' && st[i] != '\t')
  35       return true;
  36
  37   return false;
  38 }
  39
  40 bool
  41 StringTokenizer::more_tokens_p (char c)
  42 {
  43   if (pos == st.length())
  44     return false;
  45
  46   for (std::string::size_type i = pos; i < st.length(); i++)
  47     if (st[i] != c)
  48       return true;
  49
  50   return false;
  51 }
  52
  53 unsigned int
  54 StringTokenizer::count_tokens ()
  55 {
  56   unsigned int i = 0;
  57   StringTokenizer s (st);
  58
  59   while (s.more_tokens_p ())
  60     {
  61       s.next_token ();
  62       i++;
  63     }
  64
  65   return i;
  66 }
  67
  68 unsigned int
  69 StringTokenizer::count_tokens (char c)
  70 {
  71   unsigned int i = 0;
  72   StringTokenizer s(st);
  73
  74   while (s.more_tokens_p (c))
  75     {
  76       s.next_token (c);
  77       i++;
  78     }
  79
  80   return i;
  81 }
  82
  83 std::string
  84 StringTokenizer::next_token()
  85 {
  86   std::string::size_type i = pos;
  87
  88   while (i < st.length() && (st[i] == ' ' || st[i] == '\t'))
  89     i++;
  90
  91   for (std::string::size_type j = i; j < st.length(); j++)
  92     if (st[j] == ' ' || st[j] == '\t')
  93       {
  94         pos = j + 1;
  95         return st.substr (i, j - i);
  96       }
  97
  98   pos = st.length();
  99   return st.substr (i, st.length() - i);
 100 }
 101
 102 std::string
 103 StringTokenizer::next_token (char c, bool empty)
 104 {
 105   std::string::size_type i = pos;
 106   std::string::size_type j = 0;
 107
 108   while (i < st.length() && (st[i] == c))
 109     {
 110       i++;
 111     }
 112
 113   for (j = i; j < st.length(); j++)
 114     {
 115       if (st[j] == c)
 116         {
 117           pos = j + 1;
 118           return st.substr (i, j - i);
 119         }
 120     }
 121
 122   if (empty)
 123     return "";
 124
 125   pos = st.length();
 126   return st.substr (i, st.length() - i);
 127 }
 128
 129 std::string
 130 StringTokenizer::rest()
 131 {
 132   if (pos == st.length())
 133     return "";
 134
 135   // Skip whitespace
 136   while (pos < st.length() && (std::isspace (st[pos])))
 137     pos++;
 138
 139   return st.substr (pos, st.length() - pos);
 140 }