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#pragma once
#include "Base.h"
#include <ostream>
namespace cru {
struct StringToNumberFlags {
constexpr static unsigned kNoFlags = 0;
constexpr static unsigned kAllowLeadingSpaces = 1 << 0;
constexpr static unsigned kAllowTrailingSpaces = 1 << 1;
constexpr static unsigned kAllowTrailingJunk = 1 << 2;
constexpr static unsigned kAllowLeadingZeroForInteger = 1 << 2;
constexpr static unsigned kThrowOnError = 1 << 3;
};
struct StringToIntegerConverterImplResult {
StringToIntegerConverterImplResult() = default;
StringToIntegerConverterImplResult(bool negate, unsigned long long value)
: negate(negate), value(value) {}
bool negate;
unsigned long long value;
};
inline bool operator==(const StringToIntegerConverterImplResult& left,
const StringToIntegerConverterImplResult& right) {
return left.negate == right.negate && left.value == right.value;
}
inline bool operator!=(const StringToIntegerConverterImplResult& left,
const StringToIntegerConverterImplResult& right) {
return !(left == right);
}
inline std::ostream& operator<<(
std::ostream& stream, const StringToIntegerConverterImplResult& result) {
return stream << "StringToIntegerConverterImplResult("
<< (result.negate ? "-" : "") << result.value << ")";
}
/**
* \brief A converter that convert number into long long.
*/
struct StringToIntegerConverterImpl {
public:
explicit StringToIntegerConverterImpl(unsigned flags, int base = 0)
: flags(flags), base(base) {}
bool CheckParams() const;
/**
* \brief Convert string to long long.
* \param str The string to convert.
* \param size The size of the string.
* \param processed_characters_count The number of characters that were
* processed. Or nullptr to not retrieve.
*/
StringToIntegerConverterImplResult Parse(
const char* str, Index size, Index* processed_characters_count) const;
template <std::size_t Size>
StringToIntegerConverterImplResult Parse(
const char (&str)[Size], Index* processed_characters_count) const {
return Parse(str, Size - 1, processed_characters_count);
}
unsigned flags;
/**
* \brief The base of the number used for parse or 0 for auto detect.
* \remarks Base can only be of range [2, 36] or 0. If base is 0, decimal is
* assumed by default ,or if str is started with "0x" or "0X" hexadecimal is
* assumed, or if str is started with a single "0" octoral is assumed, or if
* str is started with "0b" or "0B" binary is assumed. Otherwise it is an
* error.
*/
int base;
};
} // namespace cru
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