You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-11-03 17:13:17 +03:00
278 lines
11 KiB
C++
278 lines
11 KiB
C++
// ----------------------------------------------------------------------------
|
|
// feed_args.hpp : functions for processing each argument
|
|
// (feed, feed_manip, and distribute)
|
|
// ----------------------------------------------------------------------------
|
|
|
|
// Copyright Samuel Krempp 2003. Use, modification, and distribution are
|
|
// subject to the Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
|
|
|
|
// See http://www.boost.org/libs/format for library home page
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#ifndef BOOST_FORMAT_FEED_ARGS_HPP
|
|
#define BOOST_FORMAT_FEED_ARGS_HPP
|
|
|
|
#include <boost/config.hpp>
|
|
#include <boost/assert.hpp>
|
|
#include <boost/throw_exception.hpp>
|
|
|
|
#include <boost/format/format_class.hpp>
|
|
#include <boost/format/group.hpp>
|
|
#include <boost/format/detail/msvc_disambiguater.hpp>
|
|
|
|
namespace boost {
|
|
namespace io {
|
|
namespace detail {
|
|
|
|
template<class Ch, class Tr, class Alloc>
|
|
void mk_str( std::basic_string<Ch,Tr, Alloc> & res,
|
|
const Ch * beg,
|
|
typename std::basic_string<Ch,Tr,Alloc>::size_type size,
|
|
std::streamsize w,
|
|
const Ch fill_char,
|
|
std::ios_base::fmtflags f,
|
|
const Ch prefix_space, // 0 if no space-padding
|
|
bool center)
|
|
// applies centered/left/right padding to the string [beg, beg+size[
|
|
// Effects : the result is placed in res.
|
|
{
|
|
typedef typename std::basic_string<Ch,Tr,Alloc>::size_type size_type;
|
|
res.resize(0);
|
|
if(w<=0 || static_cast<size_type>(w) <=size) {
|
|
// no need to pad.
|
|
res.reserve(size + !!prefix_space);
|
|
if(prefix_space)
|
|
res.append(1, prefix_space);
|
|
if (size)
|
|
res.append(beg, size);
|
|
}
|
|
else {
|
|
std::streamsize n=static_cast<std::streamsize>(w-size-!!prefix_space);
|
|
std::streamsize n_after = 0, n_before = 0;
|
|
res.reserve(static_cast<size_type>(w)); // allocate once for the 2 inserts
|
|
if(center)
|
|
n_after = n/2, n_before = n - n_after;
|
|
else
|
|
if(f & std::ios_base::left)
|
|
n_after = n;
|
|
else
|
|
n_before = n;
|
|
// now make the res string :
|
|
if(n_before) res.append(static_cast<size_type>(n_before), fill_char);
|
|
if(prefix_space)
|
|
res.append(1, prefix_space);
|
|
if (size)
|
|
res.append(beg, size);
|
|
if(n_after) res.append(static_cast<size_type>(n_after), fill_char);
|
|
}
|
|
} // -mk_str(..)
|
|
|
|
|
|
#if BOOST_WORKAROUND( BOOST_MSVC, <= 1300) || \
|
|
BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
|
|
// MSVC needs to be tricked to disambiguate this simple overload..
|
|
// the trick is in "boost/format/msvc_disambiguater.hpp"
|
|
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_head (BOOST_IO_STD basic_ostream<Ch, Tr> & os, const T& x ) {
|
|
disambiguater<Ch, Tr, T>::put_head(os, x, 1L);
|
|
}
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_last (BOOST_IO_STD basic_ostream<Ch, Tr> & os, const T& x ) {
|
|
disambiguater<Ch, Tr, T>::put_last(os, x, 1L);
|
|
}
|
|
|
|
#else
|
|
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_head (BOOST_IO_STD basic_ostream<Ch, Tr> &, const T& ) {
|
|
}
|
|
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_head( BOOST_IO_STD basic_ostream<Ch, Tr> & os, const group1<T>& x ) {
|
|
os << group_head(x.a1_); // send the first N-1 items, not the last
|
|
}
|
|
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_last( BOOST_IO_STD basic_ostream<Ch, Tr> & os, const T& x ) {
|
|
os << x ;
|
|
}
|
|
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_last( BOOST_IO_STD basic_ostream<Ch, Tr> & os, const group1<T>& x ) {
|
|
os << group_last(x.a1_); // this selects the last element
|
|
}
|
|
|
|
#ifndef BOOST_NO_OVERLOAD_FOR_NON_CONST
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_head( BOOST_IO_STD basic_ostream<Ch, Tr> &, T& ) {
|
|
}
|
|
|
|
template< class Ch, class Tr, class T> inline
|
|
void put_last( BOOST_IO_STD basic_ostream<Ch, Tr> & os, T& x) {
|
|
os << x ;
|
|
}
|
|
#endif
|
|
#endif // -msvc workaround
|
|
|
|
|
|
template< class Ch, class Tr, class Alloc, class T>
|
|
void put( T x,
|
|
const format_item<Ch, Tr, Alloc>& specs,
|
|
typename basic_format<Ch, Tr, Alloc>::string_type& res,
|
|
typename basic_format<Ch, Tr, Alloc>::internal_streambuf_t & buf,
|
|
io::detail::locale_t *loc_p = NULL)
|
|
{
|
|
#ifdef BOOST_MSVC
|
|
// If std::min<unsigned> or std::max<unsigned> are already instantiated
|
|
// at this point then we get a blizzard of warning messages when we call
|
|
// those templates with std::size_t as arguments. Weird and very annoyning...
|
|
#pragma warning(push)
|
|
#pragma warning(disable:4267)
|
|
#endif
|
|
// does the actual conversion of x, with given params, into a string
|
|
// using the supplied stringbuf.
|
|
|
|
typedef typename basic_format<Ch, Tr, Alloc>::string_type string_type;
|
|
typedef typename basic_format<Ch, Tr, Alloc>::format_item_t format_item_t;
|
|
typedef typename string_type::size_type size_type;
|
|
|
|
basic_oaltstringstream<Ch, Tr, Alloc> oss( &buf);
|
|
specs.fmtstate_.apply_on(oss, loc_p);
|
|
|
|
// the stream format state can be modified by manipulators in the argument :
|
|
put_head( oss, x );
|
|
// in case x is a group, apply the manip part of it,
|
|
// in order to find width
|
|
|
|
const std::ios_base::fmtflags fl=oss.flags();
|
|
const bool internal = (fl & std::ios_base::internal) != 0;
|
|
const std::streamsize w = oss.width();
|
|
const bool two_stepped_padding= internal && (w!=0);
|
|
|
|
res.resize(0);
|
|
if(! two_stepped_padding) {
|
|
if(w>0) // handle padding via mk_str, not natively in stream
|
|
oss.width(0);
|
|
put_last( oss, x);
|
|
const Ch * res_beg = buf.pbase();
|
|
Ch prefix_space = 0;
|
|
if(specs.pad_scheme_ & format_item_t::spacepad)
|
|
if(buf.pcount()== 0 ||
|
|
(res_beg[0] !=oss.widen('+') && res_beg[0] !=oss.widen('-') ))
|
|
prefix_space = oss.widen(' ');
|
|
size_type res_size = (std::min)(
|
|
static_cast<size_type>(specs.truncate_ - !!prefix_space),
|
|
buf.pcount() );
|
|
mk_str(res, res_beg, res_size, w, oss.fill(), fl,
|
|
prefix_space, (specs.pad_scheme_ & format_item_t::centered) !=0 );
|
|
}
|
|
else { // 2-stepped padding
|
|
// internal can be implied by zeropad, or user-set.
|
|
// left, right, and centered alignment overrule internal,
|
|
// but spacepad or truncate might be mixed with internal (using manipulator)
|
|
put_last( oss, x); // may pad
|
|
const Ch * res_beg = buf.pbase();
|
|
size_type res_size = buf.pcount();
|
|
bool prefix_space=false;
|
|
if(specs.pad_scheme_ & format_item_t::spacepad)
|
|
if(buf.pcount()== 0 ||
|
|
(res_beg[0] !=oss.widen('+') && res_beg[0] !=oss.widen('-') ))
|
|
prefix_space = true;
|
|
if(res_size == static_cast<size_type>(w) && w<=specs.truncate_ && !prefix_space) {
|
|
// okay, only one thing was printed and padded, so res is fine
|
|
res.assign(res_beg, res_size);
|
|
}
|
|
else { // length w exceeded
|
|
// either it was multi-output with first output padding up all width..
|
|
// either it was one big arg and we are fine.
|
|
// Note that res_size<w is possible (in case of bad user-defined formatting)
|
|
res.assign(res_beg, res_size);
|
|
res_beg=NULL; // invalidate pointers.
|
|
|
|
// make a new stream, to start re-formatting from scratch :
|
|
buf.clear_buffer();
|
|
basic_oaltstringstream<Ch, Tr, Alloc> oss2( &buf);
|
|
specs.fmtstate_.apply_on(oss2, loc_p);
|
|
put_head( oss2, x );
|
|
|
|
oss2.width(0);
|
|
if(prefix_space)
|
|
oss2 << ' ';
|
|
put_last(oss2, x );
|
|
if(buf.pcount()==0 && specs.pad_scheme_ & format_item_t::spacepad) {
|
|
prefix_space =true;
|
|
oss2 << ' ';
|
|
}
|
|
// we now have the minimal-length output
|
|
const Ch * tmp_beg = buf.pbase();
|
|
size_type tmp_size = (std::min)(static_cast<size_type>(specs.truncate_),
|
|
buf.pcount() );
|
|
|
|
|
|
if(static_cast<size_type>(w) <= tmp_size) {
|
|
// minimal length is already >= w, so no padding (cool!)
|
|
res.assign(tmp_beg, tmp_size);
|
|
}
|
|
else { // hum.. we need to pad (multi_output, or spacepad present)
|
|
//find where we should pad
|
|
size_type sz = (std::min)(res_size + (prefix_space ? 1 : 0), tmp_size);
|
|
size_type i = prefix_space;
|
|
for(; i<sz && tmp_beg[i] == res[i - (prefix_space ? 1 : 0)]; ++i) {}
|
|
if(i>=tmp_size) i=prefix_space;
|
|
res.assign(tmp_beg, i);
|
|
std::streamsize d = w - static_cast<std::streamsize>(tmp_size);
|
|
BOOST_ASSERT(d>0);
|
|
res.append(static_cast<size_type>( d ), oss2.fill());
|
|
res.append(tmp_beg+i, tmp_size-i);
|
|
BOOST_ASSERT(i+(tmp_size-i)+(std::max)(d,(std::streamsize)0)
|
|
== static_cast<size_type>(w));
|
|
BOOST_ASSERT(res.size() == static_cast<size_type>(w));
|
|
}
|
|
}
|
|
}
|
|
buf.clear_buffer();
|
|
#ifdef BOOST_MSVC
|
|
#pragma warning(pop)
|
|
#endif
|
|
} // end- put(..)
|
|
|
|
|
|
template< class Ch, class Tr, class Alloc, class T>
|
|
void distribute (basic_format<Ch,Tr, Alloc>& self, T x) {
|
|
// call put(x, ..) on every occurence of the current argument :
|
|
if(self.cur_arg_ >= self.num_args_) {
|
|
if( self.exceptions() & too_many_args_bit )
|
|
boost::throw_exception(too_many_args(self.cur_arg_, self.num_args_));
|
|
else return;
|
|
}
|
|
for(unsigned long i=0; i < self.items_.size(); ++i) {
|
|
if(self.items_[i].argN_ == self.cur_arg_) {
|
|
put<Ch, Tr, Alloc, T> (x, self.items_[i], self.items_[i].res_,
|
|
self.buf_, boost::get_pointer(self.loc_) );
|
|
}
|
|
}
|
|
}
|
|
|
|
template<class Ch, class Tr, class Alloc, class T>
|
|
basic_format<Ch, Tr, Alloc>&
|
|
feed (basic_format<Ch,Tr, Alloc>& self, T x) {
|
|
if(self.dumped_) self.clear();
|
|
distribute<Ch, Tr, Alloc, T> (self, x);
|
|
++self.cur_arg_;
|
|
if(self.bound_.size() != 0) {
|
|
while( self.cur_arg_ < self.num_args_ && self.bound_[self.cur_arg_] )
|
|
++self.cur_arg_;
|
|
}
|
|
return self;
|
|
}
|
|
|
|
} // namespace detail
|
|
} // namespace io
|
|
} // namespace boost
|
|
|
|
|
|
#endif // BOOST_FORMAT_FEED_ARGS_HPP
|