90 lines
3.9 KiB
C++
90 lines
3.9 KiB
C++
// String number conversion
|
|
|
|
#ifndef BASE_UTIL_STRING_NUMBER_CONVERSIONS_H_
|
|
#define BASE_UTIL_STRING_NUMBER_CONVERSIONS_H_
|
|
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "base/base_export.h"
|
|
#include "base/base_types.h"
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// IMPORTANT MESSAGE FROM YOUR SPONSOR
|
|
//
|
|
// This file contains no "wstring" variants. New code should use std::wstring. If
|
|
// you need to make old code work, use the UTF8 version and convert. Please do
|
|
// not add wstring variants.
|
|
//
|
|
// Please do not add "convenience" functions for converting strings to integers
|
|
// that return the value and ignore success/failure. That encourages people to
|
|
// write code that doesn't properly handle the error conditions.
|
|
// ----------------------------------------------------------------------------
|
|
|
|
namespace nbase {
|
|
|
|
// Number -> string conversions ------------------------------------------------
|
|
|
|
BASE_EXPORT std::string IntToString(int value);
|
|
BASE_EXPORT std::wstring IntToString16(int value);
|
|
|
|
BASE_EXPORT std::string UintToString(unsigned value);
|
|
BASE_EXPORT std::wstring UintToString16(unsigned value);
|
|
|
|
BASE_EXPORT std::string Int64ToString(int64_t value);
|
|
BASE_EXPORT std::wstring Int64ToString16(int64_t value);
|
|
|
|
BASE_EXPORT std::string Uint64ToString(uint64_t value);
|
|
BASE_EXPORT std::wstring Uint64ToString16(uint64_t value);
|
|
|
|
// DoubleToString converts the double to a string format that ignores the
|
|
// locale. If you want to use locale specific formatting, use ICU.
|
|
BASE_EXPORT std::string DoubleToString(double value);
|
|
|
|
// String -> number conversions ------------------------------------------------
|
|
|
|
// Perform a best-effort conversion of the input string to a numeric type,
|
|
// setting |*output| to the result of the conversion. Returns true for
|
|
// "perfect" conversions; returns false in the following cases:
|
|
// - Overflow/underflow. |*output| will be set to the maximum value supported
|
|
// by the data type.
|
|
// - Trailing characters in the string after parsing the number. |*output|
|
|
// will be set to the value of the number that was parsed.
|
|
// - Leading whitespace in the string before parsing the number. |*output| will
|
|
// be set to the value of the number that was parsed.
|
|
// - No characters parseable as a number at the beginning of the string.
|
|
// |*output| will be set to 0.
|
|
// - Empty string. |*output| will be set to 0.
|
|
BASE_EXPORT bool StringToInt(const std::string& input, int* output);
|
|
BASE_EXPORT bool StringToInt(const std::wstring& input, int* output);
|
|
|
|
BASE_EXPORT bool StringToUint(const std::string& input, unsigned* output);
|
|
BASE_EXPORT bool StringToUint(const std::wstring& input, unsigned* output);
|
|
|
|
BASE_EXPORT bool StringToInt64(const std::string& input, int64_t* output);
|
|
BASE_EXPORT bool StringToInt64(const std::wstring& input, int64_t* output);
|
|
|
|
BASE_EXPORT bool StringToUint64(const std::string& input, uint64_t* output);
|
|
BASE_EXPORT bool StringToUint64(const std::wstring& input, uint64_t* output);
|
|
|
|
BASE_EXPORT bool StringToSizeT(const std::string& input, size_t* output);
|
|
BASE_EXPORT bool StringToSizeT(const std::wstring& input, size_t* output);
|
|
|
|
// For floating-point conversions, only conversions of input strings in decimal
|
|
// form are defined to work. Behavior with strings representing floating-point
|
|
// numbers in hexadecimal, and strings representing non-fininte values (such as
|
|
// NaN and inf) is undefined. Otherwise, these behave the same as the integral
|
|
// variants. This expects the input string to NOT be specific to the locale.
|
|
// If your input is locale specific, use ICU to read the number.
|
|
BASE_EXPORT bool StringToDouble(const std::string& input, double* output);
|
|
|
|
// Hex encoding ----------------------------------------------------------------
|
|
|
|
// Best effort conversion, see StringToInt above for restrictions.
|
|
BASE_EXPORT bool HexStringToInt(const std::string& input, int* output);
|
|
|
|
} // namespace nbase
|
|
|
|
#endif // BASE_UTIL_STRING_NUMBER_CONVERSIONS_H_
|
|
|