std::wcstol, std::wcstoll

Since C++11

Header: <cwchar>

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

# Declarations

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

long long wcstoll( 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 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 LONG_MAX, LONG_MIN, LLONG_MAX or LLONG_MIN 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 (long i = std::wcstol(p, &end, 10); p != end; i = std::wcstol(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';
    }
}