mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-24 15:54:13 +01:00
294 lines
9.4 KiB
C++
294 lines
9.4 KiB
C++
//
|
|
// NumberParser.h
|
|
//
|
|
// $Id: //poco/1.4/Foundation/include/Poco/NumberParser.h#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: Core
|
|
// Module: NumberParser
|
|
//
|
|
// Definition of the NumberParser class.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person or organization
|
|
// obtaining a copy of the software and accompanying documentation covered by
|
|
// this license (the "Software") to use, reproduce, display, distribute,
|
|
// execute, and transmit the Software, and to prepare derivative works of the
|
|
// Software, and to permit third-parties to whom the Software is furnished to
|
|
// do so, all subject to the following:
|
|
//
|
|
// The copyright notices in the Software and this entire statement, including
|
|
// the above license grant, this restriction and the following disclaimer,
|
|
// must be included in all copies of the Software, in whole or in part, and
|
|
// all derivative works of the Software, unless such copies or derivative
|
|
// works are solely in the form of machine-executable object code generated by
|
|
// a source language processor.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
|
|
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
|
|
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
|
|
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
// DEALINGS IN THE SOFTWARE.
|
|
//
|
|
|
|
|
|
#ifndef Foundation_NumberParser_INCLUDED
|
|
#define Foundation_NumberParser_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include <string>
|
|
#undef min
|
|
#undef max
|
|
#include <limits>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
class Foundation_API NumberParser
|
|
/// The NumberParser class provides static methods
|
|
/// for parsing numbers out of strings.
|
|
{
|
|
public:
|
|
static int parse(const std::string& s);
|
|
/// Parses an integer value in decimal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in decimal notation.
|
|
|
|
static bool tryParse(const std::string& s, int& value);
|
|
/// Parses an integer value in decimal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
static unsigned parseUnsigned(const std::string& s);
|
|
/// Parses an unsigned integer value in decimal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in decimal notation.
|
|
|
|
static bool tryParseUnsigned(const std::string& s, unsigned& value);
|
|
/// Parses an unsigned integer value in decimal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
static unsigned parseHex(const std::string& s);
|
|
/// Parses an integer value in hexadecimal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in
|
|
/// hexadecimal notation.
|
|
|
|
static bool tryParseHex(const std::string& s, unsigned& value);
|
|
/// Parses an unsigned integer value in hexadecimal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
static unsigned parseOct(const std::string& s);
|
|
/// Parses an integer value in octal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in
|
|
/// hexadecimal notation.
|
|
|
|
static bool tryParseOct(const std::string& s, unsigned& value);
|
|
/// Parses an unsigned integer value in octal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
#if defined(POCO_HAVE_INT64)
|
|
|
|
static Int64 parse64(const std::string& s);
|
|
/// Parses a 64-bit integer value in decimal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in decimal notation.
|
|
|
|
static bool tryParse64(const std::string& s, Int64& value);
|
|
/// Parses a 64-bit integer value in decimal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
static UInt64 parseUnsigned64(const std::string& s);
|
|
/// Parses an unsigned 64-bit integer value in decimal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in decimal notation.
|
|
|
|
static bool tryParseUnsigned64(const std::string& s, UInt64& value);
|
|
/// Parses an unsigned 64-bit integer value in decimal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
static UInt64 parseHex64(const std::string& s);
|
|
/// Parses a 64 bit-integer value in hexadecimal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in hexadecimal notation.
|
|
|
|
static bool tryParseHex64(const std::string& s, UInt64& value);
|
|
/// Parses an unsigned 64-bit integer value in hexadecimal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
static UInt64 parseOct64(const std::string& s);
|
|
/// Parses a 64 bit-integer value in octal notation from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a number in hexadecimal notation.
|
|
|
|
static bool tryParseOct64(const std::string& s, UInt64& value);
|
|
/// Parses an unsigned 64-bit integer value in octal notation from the given string.
|
|
/// Returns true if a valid integer has been found, false otherwise.
|
|
|
|
#endif // defined(POCO_HAVE_INT64)
|
|
|
|
static double parseFloat(const std::string& s);
|
|
/// Parses a double value in decimal floating point notation
|
|
/// from the given string.
|
|
/// Throws a SyntaxException if the string does not hold a floating-point
|
|
/// number in decimal notation.
|
|
|
|
static bool tryParseFloat(const std::string& s, double& value);
|
|
/// Parses a double value in decimal floating point notation
|
|
/// from the given string.
|
|
/// Returns true if a valid floating point number has been found,
|
|
/// false otherwise.
|
|
|
|
static bool parseBool(const std::string& s);
|
|
/// Parses a bool value in decimal or string notation
|
|
/// from the given string.
|
|
/// Valid forms are: "0", "1", "true", "on", false", "yes", "no", "off".
|
|
/// String forms are NOT case sensitive.
|
|
/// Throws a SyntaxException if the string does not hold a valid bool number
|
|
|
|
static bool tryParseBool(const std::string& s, bool& value);
|
|
/// Parses a bool value in decimal or string notation
|
|
/// from the given string.
|
|
/// Valid forms are: "0", "1", "true", "on", false", "yes", "no", "off".
|
|
/// String forms are NOT case sensitive.
|
|
/// Returns true if a valid bool number has been found,
|
|
/// false otherwise.
|
|
|
|
private:
|
|
|
|
template <typename T>
|
|
static bool strToIntOct(const std::string &s, T& result)
|
|
{
|
|
if (s.empty()) return false;
|
|
if (std::numeric_limits<T>::is_signed) return false;
|
|
std::string::const_iterator it = s.begin();
|
|
std::string::const_iterator end = s.end();
|
|
while (it != end && std::isspace(*it)) ++it;
|
|
if (it == end) return false;
|
|
while (it != end && *it == '0') ++it;
|
|
if (it == end)
|
|
{
|
|
result = 0;
|
|
return true;
|
|
}
|
|
|
|
unsigned base = 010;
|
|
T n = 0;
|
|
for (; it != end; ++it)
|
|
{
|
|
if (*it >= '0' && *it <= '7')
|
|
{
|
|
if (n > (std::numeric_limits<T>::max() / base))
|
|
return false;
|
|
n = n * base + *it - '0';
|
|
}
|
|
else break;
|
|
}
|
|
|
|
while (it != end && std::isspace(*it)) ++it;
|
|
if (it != end) return false;
|
|
|
|
result = n;
|
|
return true;
|
|
}
|
|
|
|
template <typename T>
|
|
static bool strToIntDec(const std::string &s, T& result)
|
|
{
|
|
if (s.empty()) return false;
|
|
int sign = 1;
|
|
std::string::const_iterator it = s.begin();
|
|
std::string::const_iterator end = s.end();
|
|
while (it != end && std::isspace(*it)) ++it;
|
|
if (it == end) return false;
|
|
if (std::numeric_limits<T>::is_signed)
|
|
{
|
|
if (*it == '-')
|
|
{
|
|
sign = -1;
|
|
++it;
|
|
}
|
|
else if (*it == '+') ++it;
|
|
if (it == end) return false;
|
|
}
|
|
|
|
unsigned base = 10;
|
|
T n = 0;
|
|
for (; it != end; ++it)
|
|
{
|
|
if (*it >= '0' && *it <= '9')
|
|
{
|
|
if (n > (std::numeric_limits<T>::max() / base))
|
|
return false;
|
|
n = n * base + *it - '0';
|
|
}
|
|
else break;
|
|
}
|
|
|
|
while (it != end && std::isspace(*it)) ++it;
|
|
if (it != end) return false;
|
|
|
|
result = sign * n;
|
|
return true;
|
|
}
|
|
|
|
template <typename T>
|
|
static bool strToIntHex(const std::string &s, T& result)
|
|
{
|
|
if (s.empty()) return false;
|
|
if (std::numeric_limits<T>::is_signed) return false;
|
|
std::string::const_iterator it = s.begin();
|
|
std::string::const_iterator end = s.end();
|
|
while (it != end && std::isspace(*it)) ++it;
|
|
if (it == end) return false;
|
|
|
|
bool beginWith0x = false;
|
|
if (*it == '0')
|
|
{
|
|
beginWith0x = true;
|
|
while (it != end && *it == '0')
|
|
{
|
|
++it;
|
|
beginWith0x = false;
|
|
}
|
|
if (it == end)
|
|
{
|
|
result = 0;
|
|
return true;
|
|
}
|
|
}
|
|
if (beginWith0x && (*it != 'x') && (*it != 'X')) return false;
|
|
else if ((*it == 'x') || (*it == 'X')) ++it;
|
|
if (it == end) return false;
|
|
|
|
unsigned base = 0x10;
|
|
T n = 0;
|
|
for (; it != end; ++it)
|
|
{
|
|
if ((*it >= '0' && *it <= '9') || (*it >= 'A' && *it <= 'F'))
|
|
{
|
|
if (n > (std::numeric_limits<T>::max() / base))
|
|
return false;
|
|
|
|
if (*it >= '0' && *it <= '9')
|
|
n = n * base + *it - '0';
|
|
else if (*it >= 'A' && *it <= 'F')
|
|
n = n * base + *it - 'A' + 10;
|
|
}
|
|
else break;
|
|
}
|
|
if (it != end)
|
|
{
|
|
while (std::isspace(*it)) ++it;
|
|
if (it != end) return false;
|
|
}
|
|
|
|
result = n;
|
|
return true;
|
|
}
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_NumberParser_INCLUDED
|