_num_get.h

Go to the documentation of this file.

 
#ifndef _RWSTD_LOC_NUM_GET_H_INCLUDED
#define _RWSTD_LOC_NUM_GET_H_INCLUDED
 
 
#if __GNUG__ >= 3
#  pragma GCC system_header
#endif   // gcc >= 3
 
 
#include <loc/_facet.h>
#include <rw/_ioiter.h>
#include <rw/_iosfwd.h>
#include <rw/_traits.h>
#include <rw/_defs.h>
 
 
_RWSTD_NAMESPACE (std) { 
 
 
// 22.2.2.1
_EXPORT
template <class _CharT, class _InputIter = istreambuf_iterator<_CharT> >
struct num_get: _RW::__rw_facet
{
    typedef _CharT     char_type;
    typedef _InputIter iter_type;
 
    static _RW::__rw_facet_id id;
 
    explicit num_get (_RWSTD_SIZE_T __refs = 0)
        : _RW::__rw_facet (__refs) { }
 
#ifndef _RWSTD_NO_NATIVE_BOOL
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, bool &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
#endif   // _RWSTD_NO_NATIVE_BOOL
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err,  unsigned short &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
#ifndef _RWSTD_NO_EXT_NUM_GET
 
    // extension
    iter_type
    get (iter_type, iter_type, ios_base&, _RWSTD_IOSTATE&,  short&) const;
 
    // extension
    iter_type
    get (iter_type, iter_type, ios_base&, _RWSTD_IOSTATE&, int&) const;
 
#endif   // _RWSTD_NO_EXT_NUM_GET
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, unsigned int &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, long &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, unsigned long &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, float &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, double &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
#ifndef _RWSTD_LONG_DOUBLE
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, long double &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
#endif   // _RWSTD_LONG_DOUBLE
 
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags, 
                   _RWSTD_IOSTATE &__err, void* &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
 
#ifdef _RWSTD_LONG_LONG
 
    // extension
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags,
                   _RWSTD_IOSTATE &__err, _RWSTD_LONG_LONG &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
 
    // extension
    iter_type get (iter_type __begin, iter_type __end, ios_base &__flags,
                   _RWSTD_IOSTATE &__err,
                   unsigned _RWSTD_LONG_LONG &__val) const {
        _RWSTD_ASSERT_RANGE (__begin, __end);
        return do_get (__begin, __end, __flags, __err, __val);
    }
#endif   // _RWSTD_LONG_LONG
 
 
protected:
 
#ifndef _RWSTD_NO_NATIVE_BOOL
 
    virtual iter_type
    do_get (iter_type, iter_type, ios_base&, _RWSTD_IOSTATE&, bool&) const;
 
#endif   // _RWSTD_NO_NATIVE_BOOL
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err,  unsigned short &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_ushort, &__val);
    }
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, unsigned int &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_uint, &__val);
    }
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, long &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_long, &__val);
    }
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, unsigned long &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_ulong, &__val);
    }
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, float &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_float, &__val);
    }
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, double &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_double, &__val);
    }
 
#ifndef _RWSTD_LONG_DOUBLE
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, long double &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_ldouble, &__val);
    }
 
#endif   // _RWSTD_LONG_DOUBLE
 
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, void* &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_pvoid, &__val);
    }
 
#ifdef _RWSTD_LONG_LONG
 
    // extension
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, _RWSTD_LONG_LONG &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_llong, &__val);
    }
 
    // extension
    virtual iter_type
    do_get (iter_type __begin, iter_type __end, ios_base &__flags,
            _RWSTD_IOSTATE &__err, unsigned _RWSTD_LONG_LONG &__val) const {
        return _C_get (__begin, __end, __flags, __err, _C_ullong, &__val);
    }
 
 
#endif   // _RWSTD_LONG_LONG
 
private:
 
    iter_type
    _C_get (iter_type, iter_type, ios_base&,
            _RWSTD_IOSTATE&, int, void*) const;
};
 
 
#ifndef _RWSTD_NO_SPECIALIZED_FACET_ID
 
_RWSTD_SPECIALIZED_CLASS
_RW::__rw_facet_id num_get<char, istreambuf_iterator<char> >::id;
 
#  ifndef _RWSTD_NO_WCHAR_T
 
_RWSTD_SPECIALIZED_CLASS
_RW::__rw_facet_id num_get<wchar_t, istreambuf_iterator<wchar_t> >::id;
 
#  endif   // _RWSTD_NO_WCHAR_T
#endif   // _RWSTD_NO_SPECIALIZED_FACET_ID
 
}   // namespace std
 
 
_RWSTD_NAMESPACE (__rw) { 
 
inline short
__rw_check_overflow_short (long __lval, _RWSTD_FMTFLAGS __flags,
                           _RWSTD_IOSTATE &__err)
{
#if _RWSTD_SHRT_MAX < _RWSTD_LONG_MAX
 
    long __shrt_min;
    long __shrt_max;
 
    if (   __lval < 0
        || (__flags & _RW::__rw_basefield) == _RW::__rw_dec) {
        // decimal parsing overflows outside the range below
        __shrt_max = long (_RWSTD_SHRT_MAX);
        __shrt_min = long (_RWSTD_SHRT_MIN);
    }
    else {
        // other than decimal parsing overflows outside the range below
        // (unreliable if basefield is 0 and the sequence is decimal)
        __shrt_max = long (_RWSTD_USHRT_MAX);
        __shrt_min = long (_RWSTD_USHRT_MIN);
    }
 
    // lwg issue 23: check for overflow
    if (__lval < __shrt_min) {
        __err |= _RW::__rw_failbit;
        return short (_RWSTD_SHRT_MIN);
    }
    else if (__lval > __shrt_max) {
        __err |= _RW::__rw_failbit;
        return short (_RWSTD_SHRT_MAX);
    }
 
#else   // if LONG_MAX <= SHRT_MAX
 
    _RWSTD_UNUSED (__flags);
    _RWSTD_UNUSED (__err);
 
#endif   // _RWSTD_SHRT_MAX < _RWSTD_LONG_MAX
 
    return _RWSTD_STATIC_CAST (short, __lval);
}
 
inline int
__rw_check_overflow_int (long __lval, _RWSTD_FMTFLAGS __flags,
                         _RWSTD_IOSTATE &__err)
{
#if _RWSTD_INT_MAX < _RWSTD_LONG_MAX
 
    long __int_min;
    long __int_max;
 
    if (   __lval < 0
        || (__flags & _RW::__rw_basefield) == _RW::__rw_dec) {
        // decimal parsing overflows outside the range below
        __int_max = long (_RWSTD_INT_MAX);
        __int_min = long (_RWSTD_INT_MIN);
    }
    else {
        // other than decimal parsing overflows outside the range below
        // (unreliable if basefield is 0 and the sequence is decimal)
        __int_max = long (_RWSTD_UINT_MAX);
        __int_min = long (_RWSTD_UINT_MIN);
    }
 
    // lwg issue 23: check for overflow
    if (__lval < __int_min) {
        __err |= _RW::__rw_failbit;
        return int (_RWSTD_INT_MIN);
    }
    else if (__lval > __int_max) {
        __err |= _RW::__rw_failbit;
        return int (_RWSTD_INT_MAX);
    }
 
#else   // if LONG_MAX <= INT_MAX
 
    _RWSTD_UNUSED (__flags);
    _RWSTD_UNUSED (__err);
 
#endif   // _RWSTD_INT_MAX < _RWSTD_LONG_MAX
 
    return _RWSTD_STATIC_CAST (int, __lval);
}
 
}   // namespace __rw
 
 
#if _RWSTD_DEFINE_TEMPLATE_FIRST (_NUM_GET)
#  include <loc/_num_get.cc>
#endif   // _RWSTD_DEFINE_TEMPLATE_FIRST (_NUM_GET)
 
 
#ifdef _RWSTD_MSVC
#  pragma warning (push)
#  pragma warning (disable: 4231)
#endif   // _RWSTD_MSVC
 
 
_RWSTD_NAMESPACE (std) { 
 
#if _RWSTD_INSTANTIATE (_NUM_GET, _CHAR)
 
_RWSTD_INSTANTIATE_1 (struct _RWSTD_TI_EXPORT num_get<char>);
 
#endif   // _RWSTD_INSTANTIATE (_NUM_GET, _CHAR)
 
#if _RWSTD_INSTANTIATE (_NUM_GET, _WCHAR_T)
 
_RWSTD_INSTANTIATE_1 (struct _RWSTD_TI_EXPORT num_get<wchar_t>);
 
#endif   // _RWSTD_INSTANTIATE (_NUM_GET, _WCHAR_T)
 
}   // namespace std
 
 
#ifdef _RWSTD_MSVC
#  pragma warning (pop)
#endif   // _RWSTD_MSVC
 
 
#if _RWSTD_DEFINE_TEMPLATE_LAST (_NUM_GET)
#  include <loc/_num_get.cc>
#endif   // _RWSTD_DEFINE_TEMPLATE_LAST (_NUM_GET)
 
 
#endif   // _RWSTD_LOC_NUM_GET_H_INCLUDED