external/bsd/atf/dist/tools/text.cpp

   1 //
   2 // Automated Testing Framework (atf)
   3 //
   4 // Copyright (c) 2007 The NetBSD Foundation, Inc.
   5 // All rights reserved.
   6 //
   7 // Redistribution and use in source and binary forms, with or without
   8 // modification, are permitted provided that the following conditions
   9 // are met:
  10 // 1. Redistributions of source code must retain the above copyright
  11 //    notice, this list of conditions and the following disclaimer.
  12 // 2. Redistributions in binary form must reproduce the above copyright
  13 //    notice, this list of conditions and the following disclaimer in the
  14 //    documentation and/or other materials provided with the distribution.
  15 //
  16 // THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
  17 // CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
  18 // INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20 // IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
  21 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  23 // GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24 // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  25 // IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  26 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  27 // IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28 //
  29
  30 extern "C" {
  31 #include <regex.h>
  32 }
  33
  34 #include <cctype>
  35 #include <cerrno>
  36 #include <cstring>
  37
  38 #include "exceptions.hpp"
  39 #include "text.hpp"
  40
  41 namespace impl = tools::text;
  42 #define IMPL_NAME "tools::text"
  43
  44 char*
  45 impl::duplicate(const char* str)
  46 {
  47     char* copy = new char[std::strlen(str) + 1];
  48     std::strcpy(copy, str);
  49     return copy;
  50 }
  51
  52 bool
  53 impl::match(const std::string& str, const std::string& regex)
  54 {
  55     bool found;
  56
  57     // Special case: regcomp does not like empty regular expressions.
  58     if (regex.empty()) {
  59         found = str.empty();
  60     } else {
  61         ::regex_t preg;
  62
  63         if (::regcomp(&preg, regex.c_str(), REG_EXTENDED) != 0)
  64             throw std::runtime_error("Invalid regular expression '" + regex +
  65                                      "'");
  66
  67         const int res = ::regexec(&preg, str.c_str(), 0, NULL, 0);
  68         regfree(&preg);
  69         if (res != 0 && res != REG_NOMATCH)
  70             throw std::runtime_error("Invalid regular expression " + regex);
  71
  72         found = res == 0;
  73     }
  74
  75     return found;
  76 }
  77
  78 std::string
  79 impl::to_lower(const std::string& str)
  80 {
  81     std::string lc;
  82     for (std::string::const_iterator iter = str.begin(); iter != str.end();
  83          iter++)
  84         lc += std::tolower(*iter);
  85     return lc;
  86 }
  87
  88 std::vector< std::string >
  89 impl::split(const std::string& str, const std::string& delim)
  90 {
  91     std::vector< std::string > words;
  92
  93     std::string::size_type pos = 0, newpos = 0;
  94     while (pos < str.length() && newpos != std::string::npos) {
  95         newpos = str.find(delim, pos);
  96         if (newpos != pos)
  97             words.push_back(str.substr(pos, newpos - pos));
  98         pos = newpos + delim.length();
  99     }
 100
 101     return words;
 102 }
 103
 104 std::string
 105 impl::trim(const std::string& str)
 106 {
 107     std::string::size_type pos1 = str.find_first_not_of(" \t");
 108     std::string::size_type pos2 = str.find_last_not_of(" \t");
 109
 110     if (pos1 == std::string::npos && pos2 == std::string::npos)
 111         return "";
 112     else if (pos1 == std::string::npos)
 113         return str.substr(0, str.length() - pos2);
 114     else if (pos2 == std::string::npos)
 115         return str.substr(pos1);
 116     else
 117         return str.substr(pos1, pos2 - pos1 + 1);
 118 }
 119
 120 bool
 121 impl::to_bool(const std::string& str)
 122 {
 123     const std::string lower = to_lower(str);
 124     if (lower == "yes" || lower == "true")
 125         return true;
 126     else if (lower == "no" || lower == "false")
 127         return false;
 128     else {
 129         // XXX Not really a libc error.
 130         throw system_error(IMPL_NAME "::to_bool", "Cannot convert string "
 131                            "'" + str + "' to boolean", EINVAL);
 132     }
 133 }
 134
 135 int64_t
 136 impl::to_bytes(std::string str)
 137 {
 138     if (str.empty())
 139         throw std::runtime_error("Empty value");
 140
 141     const char unit = str[str.length() - 1];
 142     int64_t multiplier;
 143     switch (unit) {
 144     case 'k': case 'K': multiplier = 1 << 10; break;
 145     case 'm': case 'M': multiplier = 1 << 20; break;
 146     case 'g': case 'G': multiplier = 1 << 30; break;
 147     case 't': case 'T': multiplier = int64_t(1) << 40; break;
 148     default:
 149         if (!std::isdigit(unit))
 150             throw std::runtime_error(std::string("Unknown size unit '") + unit
 151                                      + "'");
 152         multiplier = 1;
 153     }
 154     if (multiplier != 1)
 155         str.erase(str.length() - 1);
 156
 157     return to_type< int64_t >(str) * multiplier;
 158 }