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5055dedbfc
"reneg-sec"), where if period is 0, we must treat it as essentially infinite. This fixes the issue where "reneg-sec 0" was causing an infinite connect loop. Refactored number.hpp to provide all reasonable number-parsing functionality, so that typeinfo.hpp can be retired.
124 lines
2.5 KiB
C++
124 lines
2.5 KiB
C++
//
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// number.hpp
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// OpenVPN
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//
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// Copyright (c) 2012 OpenVPN Technologies, Inc. All rights reserved.
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//
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// General purpose methods for dealing with numbers.
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#ifndef OPENVPN_COMMON_NUMBER_H
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#define OPENVPN_COMMON_NUMBER_H
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#include <string>
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#include <limits>
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#include <openvpn/common/types.hpp>
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#include <openvpn/common/exception.hpp>
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namespace openvpn {
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OPENVPN_EXCEPTION(number_parse_exception);
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// Parse the number of type T in str, returning
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// value in retval. Returns true on success.
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// Note -- currently doesn't detect overflow.
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template <typename T>
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inline bool parse_number(const char *str, T& retval)
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{
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if (!str[0])
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return false; // empty string
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bool neg = false;
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size_t i = 0;
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if (std::numeric_limits<T>::min() < 0 && str[0] == '-')
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{
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neg = true;
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i = 1;
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}
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T ret = T(0);
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while (true)
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{
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const char c = str[i++];
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if (c >= '0' && c <= '9')
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{
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ret *= T(10);
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ret += T(c - '0');
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}
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else if (!c)
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{
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retval = neg ? -ret : ret;
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return true;
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}
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else
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return false; // non-digit
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}
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}
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// like parse_number above, but accepts std::string
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template <typename T>
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inline bool parse_number(const std::string& str, T& retval)
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{
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return parse_number<T>(str.c_str(), retval);
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}
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template <typename T>
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inline T parse_number_throw(const std::string& str, const char *error)
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{
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T ret;
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if (parse_number<T>(str.c_str(), ret))
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return ret;
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else
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throw number_parse_exception(std::string(error));
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}
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template <typename T>
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inline T parse_number_throw(const char *str, const char *error)
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{
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T ret;
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if (parse_number<T>(str, ret))
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return ret;
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else
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throw number_parse_exception(std::string(error));
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}
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template <typename T>
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inline bool parse_number_validate(const std::string& numstr,
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const size_t max_len,
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const T minimum,
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const T maximum,
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T* value_return = NULL)
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{
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if (numstr.length() <= max_len)
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{
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T value;
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if (parse_number<T>(numstr.c_str(), value))
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{
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if (value >= minimum && value <= maximum)
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{
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if (value_return)
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*value_return = value;
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return true;
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}
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}
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}
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return false;
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}
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inline bool is_number(const char *str)
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{
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char c;
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bool found_digit = false;
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while ((c = *str++))
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{
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if (c >= '0' && c <= '9')
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found_digit = true;
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else
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return false;
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}
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return found_digit;
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}
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} // namespace openvpn
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#endif // OPENVPN_COMMON_NUMBER_H
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