std::wcstoul, std::wcstoull

Since C++11

Header: <cwchar>

Interprets an unsigned integer value in a wide string pointed to by str.

# Declarations

unsigned long wcstoul ( const wchar_t* str, wchar_t** str_end, int base );

unsigned long long wcstoull( const wchar_t* str, wchar_t** str_end, int base );

(since C++11)

# Parameters

str: pointer to the null-terminated wide string to be interpreted
str_end: pointer to a pointer to a wide character
base: base of the interpreted integer value

# Return value

Integer value corresponding to the contents of str on success. If the converted value falls out of range of corresponding return type, range error occurs and ULONG_MAX or ULLONG_MAX is returned. If no conversion can be performed, 0 is returned.

# Example

#include <cwchar>
#include <errno.h>
#include <iostream>
#include <string>
 
int main()
{
    const wchar_t* p = L"10 200000000000000000000000000000 30 40";
    wchar_t* end;
    std::wcout << "Parsing L'" << p << "':\n";
    for (unsigned long i = std::wcstoul(p, &end, 10);
         p != end;
         i = std::wcstoul(p, &end, 10))
    {
        std::wcout << '\'' << std::wstring(p, end - p) << "' -> ";
        p = end;
        if (errno == ERANGE)
        {
            std::wcout << "range error, got ";
            errno = 0;
        }
        std::wcout << i << '\n';
    }
}