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/**
* @file
* @author 2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#include <inttypes.h>
#include <stdlib.h>
#include <boost/detail/endian.hpp>
#include <boost/lexical_cast.hpp>
namespace uscxml {
bool isnan(double x) {
return x != x;
}
bool isNumeric(const char* pszInput, int nNumberBase) {
std::string base = ".-0123456789ABCDEF";
std::string input = pszInput;
return (input.find_first_not_of(base.substr(0, nNumberBase + 2)) == std::string::npos);
}
bool isInteger(const char* pszInput, int nNumberBase) {
std::string base = "-0123456789ABCDEF";
std::string input = pszInput;
return (input.find_first_not_of(base.substr(0, nNumberBase + 1)) == std::string::npos);
}
bool iequals(const std::string& a, const std::string& b) {
// this impementation beats boost::iequals 2700ms vs 2100ms for test-performance.scxml - we don't care for non-ascii yet
unsigned int size = a.size();
if (b.size() != size)
return false;
for (unsigned int i = 0; i < size; ++i)
if (tolower(a[i]) != tolower(b[i]))
return false;
return true;
}
bool equals(const std::string& a, const std::string& b) {
unsigned int size = a.size();
if (b.size() != size)
return false;
for (unsigned int i = 0; i < size; ++i)
if (a[i] != b[i])
return false;
return true;
}
bool stringIsTrue(const std::string& value) {
return (iequals(value, "on") ||
iequals(value, "true") ||
iequals(value, "1") ||
iequals(value, "yes"));
}
bool envVarIsTrue(const char* name) {
const char* value = getenv(name);
if (value == NULL)
return false;
return stringIsTrue(value);
}
bool envVarIEquals(const char* name, const char* value) {
const char* envVarValue = getenv(name);
if (envVarValue == NULL)
return false;
return iequals(envVarValue, value);
}
std::string unescape(const std::string& a) {
std::stringstream b;
// see http://en.cppreference.com/w/cpp/language/escape
std::string::const_iterator it = a.begin();
while (it != a.end()) {
char c = *it++;
if (c == '\\' && it != a.end()) {
switch (*it++) {
case '\\':
c = '\\';
break;
case '0':
c = '\0';
break;
case 'a':
c = '\a';
break;
case 'b':
c = '\b';
break;
case 'f':
c = '\f';
break;
case 'n':
c = '\n';
break;
case 'r':
c = '\r';
break;
case 't':
c = '\t';
break;
case 'v':
c = '\v';
break;
}
}
b << c;
}
return b.str();
}
}
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