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//===------------------------- string.cpp ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "string"
#include "cstdlib"
#include "cwchar"
#include "cerrno"
#include "limits"
#include "stdexcept"
#ifdef _LIBCPP_MSVCRT
#include "support/win32/support.h"
#endif // _LIBCPP_MSVCRT
#include <stdio.h>
_LIBCPP_BEGIN_NAMESPACE_STD
template class __basic_string_common<true>;
template class basic_string<char>;
template class basic_string<wchar_t>;
template
string
operator+<char, char_traits<char>, allocator<char> >(char const*, string const&);
namespace
{
template<typename T>
inline
void throw_helper( const string& msg )
{
#ifndef _LIBCPP_NO_EXCEPTIONS
throw T( msg );
#else
fprintf(stderr, "%s\n", msg.c_str());
abort();
#endif
}
inline
void throw_from_string_out_of_range( const string& func )
{
throw_helper<out_of_range>(func + ": out of range");
}
inline
void throw_from_string_invalid_arg( const string& func )
{
throw_helper<invalid_argument>(func + ": no conversion");
}
// as_integer
template<typename V, typename S, typename F>
inline
V
as_integer_helper(const string& func, const S& str, size_t* idx, int base, F f)
{
typename S::value_type* ptr = nullptr;
const typename S::value_type* const p = str.c_str();
typename remove_reference<decltype(errno)>::type errno_save = errno;
errno = 0;
V r = f(p, &ptr, base);
swap(errno, errno_save);
if (errno_save == ERANGE)
throw_from_string_out_of_range(func);
if (ptr == p)
throw_from_string_invalid_arg(func);
if (idx)
*idx = static_cast<size_t>(ptr - p);
return r;
}
template<typename V, typename S>
inline
V
as_integer(const string& func, const S& s, size_t* idx, int base);
// string
template<>
inline
int
as_integer(const string& func, const string& s, size_t* idx, int base )
{
// Use long as no Standard string to integer exists.
long r = as_integer_helper<long>( func, s, idx, base, strtol );
if (r < numeric_limits<int>::min() || numeric_limits<int>::max() < r)
throw_from_string_out_of_range(func);
return static_cast<int>(r);
}
template<>
inline
long
as_integer(const string& func, const string& s, size_t* idx, int base )
{
return as_integer_helper<long>( func, s, idx, base, strtol );
}
template<>
inline
unsigned long
as_integer( const string& func, const string& s, size_t* idx, int base )
{
return as_integer_helper<unsigned long>( func, s, idx, base, strtoul );
}
template<>
inline
long long
as_integer( const string& func, const string& s, size_t* idx, int base )
{
return as_integer_helper<long long>( func, s, idx, base, strtoll );
}
template<>
inline
unsigned long long
as_integer( const string& func, const string& s, size_t* idx, int base )
{
return as_integer_helper<unsigned long long>( func, s, idx, base, strtoull );
}
// wstring
template<>
inline
int
as_integer( const string& func, const wstring& s, size_t* idx, int base )
{
// Use long as no Stantard string to integer exists.
long r = as_integer_helper<long>( func, s, idx, base, wcstol );
if (r < numeric_limits<int>::min() || numeric_limits<int>::max() < r)
throw_from_string_out_of_range(func);
return static_cast<int>(r);
}
template<>
inline
long
as_integer( const string& func, const wstring& s, size_t* idx, int base )
{
return as_integer_helper<long>( func, s, idx, base, wcstol );
}
template<>
inline
unsigned long
as_integer( const string& func, const wstring& s, size_t* idx, int base )
{
return as_integer_helper<unsigned long>( func, s, idx, base, wcstoul );
}
template<>
inline
long long
as_integer( const string& func, const wstring& s, size_t* idx, int base )
{
return as_integer_helper<long long>( func, s, idx, base, wcstoll );
}
template<>
inline
unsigned long long
as_integer( const string& func, const wstring& s, size_t* idx, int base )
{
return as_integer_helper<unsigned long long>( func, s, idx, base, wcstoull );
}
// as_float
template<typename V, typename S, typename F>
inline
V
as_float_helper(const string& func, const S& str, size_t* idx, F f )
{
typename S::value_type* ptr = nullptr;
const typename S::value_type* const p = str.c_str();
typename remove_reference<decltype(errno)>::type errno_save = errno;
errno = 0;
V r = f(p, &ptr);
swap(errno, errno_save);
if (errno_save == ERANGE)
throw_from_string_out_of_range(func);
if (ptr == p)
throw_from_string_invalid_arg(func);
if (idx)
*idx = static_cast<size_t>(ptr - p);
return r;
}
template<typename V, typename S>
inline
V as_float( const string& func, const S& s, size_t* idx = nullptr );
template<>
inline
float
as_float( const string& func, const string& s, size_t* idx )
{
return as_float_helper<float>( func, s, idx, strtof );
}
template<>
inline
double
as_float(const string& func, const string& s, size_t* idx )
{
return as_float_helper<double>( func, s, idx, strtod );
}
template<>
inline
long double
as_float( const string& func, const string& s, size_t* idx )
{
return as_float_helper<long double>( func, s, idx, strtold );
}
template<>
inline
float
as_float( const string& func, const wstring& s, size_t* idx )
{
return as_float_helper<float>( func, s, idx, wcstof );
}
template<>
inline
double
as_float( const string& func, const wstring& s, size_t* idx )
{
return as_float_helper<double>( func, s, idx, wcstod );
}
template<>
inline
long double
as_float( const string& func, const wstring& s, size_t* idx )
{
return as_float_helper<long double>( func, s, idx, wcstold );
}
} // unnamed namespace
int
stoi(const string& str, size_t* idx, int base)
{
return as_integer<int>( "stoi", str, idx, base );
}
int
stoi(const wstring& str, size_t* idx, int base)
{
return as_integer<int>( "stoi", str, idx, base );
}
long
stol(const string& str, size_t* idx, int base)
{
return as_integer<long>( "stol", str, idx, base );
}
long
stol(const wstring& str, size_t* idx, int base)
{
return as_integer<long>( "stol", str, idx, base );
}
unsigned long
stoul(const string& str, size_t* idx, int base)
{
return as_integer<unsigned long>( "stoul", str, idx, base );
}
unsigned long
stoul(const wstring& str, size_t* idx, int base)
{
return as_integer<unsigned long>( "stoul", str, idx, base );
}
long long
stoll(const string& str, size_t* idx, int base)
{
return as_integer<long long>( "stoll", str, idx, base );
}
long long
stoll(const wstring& str, size_t* idx, int base)
{
return as_integer<long long>( "stoll", str, idx, base );
}
unsigned long long
stoull(const string& str, size_t* idx, int base)
{
return as_integer<unsigned long long>( "stoull", str, idx, base );
}
unsigned long long
stoull(const wstring& str, size_t* idx, int base)
{
return as_integer<unsigned long long>( "stoull", str, idx, base );
}
float
stof(const string& str, size_t* idx)
{
return as_float<float>( "stof", str, idx );
}
float
stof(const wstring& str, size_t* idx)
{
return as_float<float>( "stof", str, idx );
}
double
stod(const string& str, size_t* idx)
{
return as_float<double>( "stod", str, idx );
}
double
stod(const wstring& str, size_t* idx)
{
return as_float<double>( "stod", str, idx );
}
long double
stold(const string& str, size_t* idx)
{
return as_float<long double>( "stold", str, idx );
}
long double
stold(const wstring& str, size_t* idx)
{
return as_float<long double>( "stold", str, idx );
}
// to_string
namespace
{
// as_string
template<typename S, typename P, typename V >
inline
S
as_string(P sprintf_like, S s, const typename S::value_type* fmt, V a)
{
typedef typename S::size_type size_type;
size_type available = s.size();
while (true)
{
int status = sprintf_like(&s[0], available + 1, fmt, a);
if ( status >= 0 )
{
size_type used = static_cast<size_type>(status);
if ( used <= available )
{
s.resize( used );
break;
}
available = used; // Assume this is advice of how much space we need.
}
else
available = available * 2 + 1;
s.resize(available);
}
return s;
}
template <class S, class V, bool = is_floating_point<V>::value>
struct initial_string;
template <class V, bool b>
struct initial_string<string, V, b>
{
string
operator()() const
{
string s;
s.resize(s.capacity());
return s;
}
};
template <class V>
struct initial_string<wstring, V, false>
{
wstring
operator()() const
{
const size_t n = (numeric_limits<unsigned long long>::digits / 3)
+ ((numeric_limits<unsigned long long>::digits % 3) != 0)
+ 1;
wstring s(n, wchar_t());
s.resize(s.capacity());
return s;
}
};
template <class V>
struct initial_string<wstring, V, true>
{
wstring
operator()() const
{
wstring s(20, wchar_t());
s.resize(s.capacity());
return s;
}
};
typedef int (*wide_printf)(wchar_t* __restrict, size_t, const wchar_t*__restrict, ...);
inline
wide_printf
get_swprintf()
{
#ifndef _LIBCPP_MSVCRT
return swprintf;
#else
return static_cast<int (__cdecl*)(wchar_t* __restrict, size_t, const wchar_t*__restrict, ...)>(swprintf);
#endif
}
} // unnamed namespace
string to_string(int val)
{
return as_string(snprintf, initial_string<string, int>()(), "%d", val);
}
string to_string(unsigned val)
{
return as_string(snprintf, initial_string<string, unsigned>()(), "%u", val);
}
string to_string(long val)
{
return as_string(snprintf, initial_string<string, long>()(), "%ld", val);
}
string to_string(unsigned long val)
{
return as_string(snprintf, initial_string<string, unsigned long>()(), "%lu", val);
}
string to_string(long long val)
{
return as_string(snprintf, initial_string<string, long long>()(), "%lld", val);
}
string to_string(unsigned long long val)
{
return as_string(snprintf, initial_string<string, unsigned long long>()(), "%llu", val);
}
string to_string(float val)
{
return as_string(snprintf, initial_string<string, float>()(), "%f", val);
}
string to_string(double val)
{
return as_string(snprintf, initial_string<string, double>()(), "%f", val);
}
string to_string(long double val)
{
return as_string(snprintf, initial_string<string, long double>()(), "%Lf", val);
}
wstring to_wstring(int val)
{
return as_string(get_swprintf(), initial_string<wstring, int>()(), L"%d", val);
}
wstring to_wstring(unsigned val)
{
return as_string(get_swprintf(), initial_string<wstring, unsigned>()(), L"%u", val);
}
wstring to_wstring(long val)
{
return as_string(get_swprintf(), initial_string<wstring, long>()(), L"%ld", val);
}
wstring to_wstring(unsigned long val)
{
return as_string(get_swprintf(), initial_string<wstring, unsigned long>()(), L"%lu", val);
}
wstring to_wstring(long long val)
{
return as_string(get_swprintf(), initial_string<wstring, long long>()(), L"%lld", val);
}
wstring to_wstring(unsigned long long val)
{
return as_string(get_swprintf(), initial_string<wstring, unsigned long long>()(), L"%llu", val);
}
wstring to_wstring(float val)
{
return as_string(get_swprintf(), initial_string<wstring, float>()(), L"%f", val);
}
wstring to_wstring(double val)
{
return as_string(get_swprintf(), initial_string<wstring, double>()(), L"%f", val);
}
wstring to_wstring(long double val)
{
return as_string(get_swprintf(), initial_string<wstring, long double>()(), L"%Lf", val);
}
_LIBCPP_END_NAMESPACE_STD