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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18
  19 #include "StringTokenizer.H"
  20
  21 #include <string>
  22
  23 #include <cstring>
  24
  25 StringTokenizer::StringTokenizer(std::string s)
  26   : st(s), pos(0)
  27 { }
  28
  29 bool
  30 StringTokenizer::more_tokens_p ()
  31 {
  32   if (pos == st.length())
  33     return false;
  34
  35   for (std::string::size_type i = pos; i < st.length(); i++)
  36     if (st[i] != ' ' && st[i] != '\t')
  37       return true;
  38
  39   return false;
  40 }
  41
  42 bool
  43 StringTokenizer::more_tokens_p (char c)
  44 {
  45   if (pos == st.length())
  46     return false;
  47
  48   for (std::string::size_type i = pos; i < st.length(); i++)
  49     if (st[i] != c)
  50       return true;
  51
  52   return false;
  53 }
  54
  55 unsigned int
  56 StringTokenizer::count_tokens ()
  57 {
  58   unsigned int i = 0;
  59   StringTokenizer s (st);
  60
  61   while (s.more_tokens_p ())
  62     {
  63       s.next_token ();
  64       i++;
  65     }
  66
  67   return i;
  68 }
  69
  70 unsigned int
  71 StringTokenizer::count_tokens (char c)
  72 {
  73   unsigned int i = 0;
  74   StringTokenizer s(st);
  75
  76   while (s.more_tokens_p (c))
  77     {
  78       s.next_token (c);
  79       i++;
  80     }
  81
  82   return i;
  83 }
  84
  85 std::string
  86 StringTokenizer::next_token()
  87 {
  88   std::string::size_type i = pos;
  89
  90   while (i < st.length() && (st[i] == ' ' || st[i] == '\t'))
  91     i++;
  92
  93   for (std::string::size_type j = i; j < st.length(); j++)
  94     if (st[j] == ' ' || st[j] == '\t')
  95       {
  96         pos = j + 1;
  97         return st.substr (i, j - i);
  98       }
  99
 100   pos = st.length();
 101   return st.substr (i, st.length() - i);
 102 }
 103
 104 std::string
 105 StringTokenizer::next_token (char c, bool empty)
 106 {
 107   std::string::size_type i = pos;
 108   std::string::size_type j = 0;
 109
 110   while (i < st.length() && (st[i] == c))
 111     {
 112       i++;
 113     }
 114
 115   for (j = i; j < st.length(); j++)
 116     {
 117       if (st[j] == c)
 118         {
 119           pos = j + 1;
 120           return st.substr (i, j - i);
 121         }
 122     }
 123
 124   if (empty)
 125     return "";
 126
 127   pos = st.length();
 128   return st.substr (i, st.length() - i);
 129 }
 130
 131 std::string
 132 StringTokenizer::rest()
 133 {
 134   if (pos == st.length())
 135     return "";
 136
 137   // Skip whitespace
 138   while (pos < st.length() && (std::isspace (st[pos])))
 139     pos++;
 140
 141   return st.substr (pos, st.length() - pos);
 142 }