src/base/range.cc

   1 /*
   2  * Copyright (c) 2004-2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include "base/intmath.hh"
  30 #include "base/range.hh"
  31 #include "base/str.hh"
  32
  33 using namespace std;
  34
  35 template <class T>
  36 bool
  37 __x_parse_range(const std::string &str, T &first, T &last)
  38 {
  39     std::vector<std::string> values;
  40     tokenize(values, str, ':');
  41
  42     T thefirst, thelast;
  43
  44     if (values.size() != 2)
  45         return false;
  46
  47     std::string s = values[0];
  48     std::string e = values[1];
  49
  50     if (!to_number(s, thefirst))
  51         return false;
  52
  53     bool increment = (e[0] == '+');
  54     if (increment)
  55         e = e.substr(1);
  56
  57     if (!to_number(e, thelast))
  58         return false;
  59
  60     if (increment)
  61         thelast += thefirst - 1;
  62
  63     first = thefirst;
  64     last = thelast;
  65
  66     return true;
  67 }
  68
  69 #define RANGE_PARSE(type) \
  70 template<> bool \
  71 __parse_range(const std::string &s, type &first, type &last) \
  72 { return __x_parse_range(s, first, last); }
  73
  74 RANGE_PARSE(unsigned long long);
  75 RANGE_PARSE(signed long long);
  76 RANGE_PARSE(unsigned long);
  77 RANGE_PARSE(signed long);
  78 RANGE_PARSE(unsigned int);
  79 RANGE_PARSE(signed int);
  80 RANGE_PARSE(unsigned short);
  81 RANGE_PARSE(signed short);
  82 RANGE_PARSE(unsigned char);
  83 RANGE_PARSE(signed char);