257 lines
7.6 KiB
C++
257 lines
7.6 KiB
C++
|
// -*- C++ -*-
|
|||
|
|
// Boost general library format ---------------------------
|
|||
|
|
// See http://www.boost.org for updates, documentation, and revision history.
|
|||
|
|
|
|||
|
|
// (C) Samuel Krempp 2001
|
|||
|
|
// krempp@crans.ens-cachan.fr
|
|||
|
|
// Permission to copy, use, modify, sell and
|
|||
|
|
// distribute this software is granted provided this copyright notice appears
|
|||
|
|
// in all copies. This software is provided "as is" without express or implied
|
|||
|
|
// warranty, and with no claim as to its suitability for any purpose.
|
|||
|
|
|
|||
|
|
// ideas taken from R<>diger Loos's format class
|
|||
|
|
// and Karl Nelson's ofstream
|
|||
|
|
|
|||
|
|
// ----------------------------------------------------------------------------
|
|||
|
|
// format_implementation.hpp Implementation of the basic_format class
|
|||
|
|
// ----------------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
|
|||
|
|
#ifndef BOOST_FORMAT_IMPLEMENTATION_HPP
|
|||
|
|
#define BOOST_FORMAT_IMPLEMENTATION_HPP
|
|||
|
|
|
|||
|
|
#include <boost/throw_exception.hpp>
|
|||
|
|
#include <boost/assert.hpp>
|
|||
|
|
#include <boost/format.hpp>
|
|||
|
|
|
|||
|
|
namespace boost {
|
|||
|
|
|
|||
|
|
// -------- format:: -------------------------------------------
|
|||
|
|
basic_format::basic_format(const char* str)
|
|||
|
|
: style_(0), cur_arg_(0), num_args_(0), dumped_(false),
|
|||
|
|
items_(), oss_(), exceptions_(io::all_error_bits)
|
|||
|
|
{
|
|||
|
|
state0_.set_by_stream(oss_);
|
|||
|
|
string_t emptyStr;
|
|||
|
|
if( !str) str = emptyStr.c_str();
|
|||
|
|
parse( str );
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
#ifndef BOOST_NO_STD_LOCALE
|
|||
|
|
basic_format::basic_format(const char* str, const std::locale & loc)
|
|||
|
|
: style_(0), cur_arg_(0), num_args_(0), dumped_(false),
|
|||
|
|
items_(), oss_(), exceptions_(io::all_error_bits)
|
|||
|
|
{
|
|||
|
|
oss_.imbue( loc );
|
|||
|
|
state0_.set_by_stream(oss_);
|
|||
|
|
string_t emptyStr;
|
|||
|
|
if( !str) str = emptyStr.c_str();
|
|||
|
|
parse( str );
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
basic_format::basic_format(const string_t& s, const std::locale & loc)
|
|||
|
|
: style_(0), cur_arg_(0), num_args_(0), dumped_(false),
|
|||
|
|
items_(), oss_(), exceptions_(io::all_error_bits)
|
|||
|
|
{
|
|||
|
|
oss_.imbue( loc );
|
|||
|
|
state0_.set_by_stream(oss_);
|
|||
|
|
parse(s);
|
|||
|
|
}
|
|||
|
|
#endif //BOOST_NO_STD_LOCALE
|
|||
|
|
|
|||
|
|
basic_format::basic_format(const string_t& s)
|
|||
|
|
: style_(0), cur_arg_(0), num_args_(0), dumped_(false),
|
|||
|
|
items_(), oss_(), exceptions_(io::all_error_bits)
|
|||
|
|
{
|
|||
|
|
state0_.set_by_stream(oss_);
|
|||
|
|
parse(s);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
basic_format:: basic_format(const basic_format& x)
|
|||
|
|
: style_(x.style_), cur_arg_(x.cur_arg_), num_args_(x.num_args_), dumped_(false),
|
|||
|
|
items_(x.items_), prefix_(x.prefix_), bound_(x.bound_),
|
|||
|
|
oss_(), // <- we obviously can't copy x.oss_
|
|||
|
|
state0_(x.state0_), exceptions_(x.exceptions_)
|
|||
|
|
{
|
|||
|
|
state0_.apply_on(oss_);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
basic_format& basic_format::operator= (const basic_format& x)
|
|||
|
|
{
|
|||
|
|
if(this == &x)
|
|||
|
|
return *this;
|
|||
|
|
state0_ = x.state0_;
|
|||
|
|
state0_.apply_on(oss_);
|
|||
|
|
|
|||
|
|
// plus all the other (trivial) assignments :
|
|||
|
|
exceptions_ = x.exceptions_;
|
|||
|
|
items_ = x.items_;
|
|||
|
|
prefix_ = x.prefix_;
|
|||
|
|
bound_=x.bound_;
|
|||
|
|
style_=x.style_;
|
|||
|
|
cur_arg_=x.cur_arg_;
|
|||
|
|
num_args_=x.num_args_;
|
|||
|
|
dumped_=x.dumped_;
|
|||
|
|
return *this;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
unsigned char basic_format::exceptions() const
|
|||
|
|
{
|
|||
|
|
return exceptions_;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
unsigned char basic_format::exceptions(unsigned char newexcept)
|
|||
|
|
{
|
|||
|
|
unsigned char swp = exceptions_;
|
|||
|
|
exceptions_ = newexcept;
|
|||
|
|
return swp;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
basic_format& basic_format ::clear()
|
|||
|
|
// empty the string buffers (except bound arguments, see clear_binds() )
|
|||
|
|
// and make the format object ready for formatting a new set of arguments
|
|||
|
|
{
|
|||
|
|
BOOST_ASSERT( bound_.size()==0 || num_args_ == static_cast<int>(bound_.size()) );
|
|||
|
|
|
|||
|
|
for(unsigned long i=0; i<items_.size(); ++i){
|
|||
|
|
items_[i].state_ = items_[i].ref_state_;
|
|||
|
|
// clear converted strings only if the corresponding argument is not bound :
|
|||
|
|
if( bound_.size()==0 || !bound_[ items_[i].argN_ ] ) items_[i].res_.resize(0);
|
|||
|
|
}
|
|||
|
|
cur_arg_=0; dumped_=false;
|
|||
|
|
// maybe first arg is bound:
|
|||
|
|
if(bound_.size() != 0)
|
|||
|
|
{
|
|||
|
|
while(cur_arg_ < num_args_ && bound_[cur_arg_] ) ++cur_arg_;
|
|||
|
|
}
|
|||
|
|
return *this;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
basic_format& basic_format ::clear_binds()
|
|||
|
|
// cancel all bindings, and clear()
|
|||
|
|
{
|
|||
|
|
bound_.resize(0);
|
|||
|
|
clear();
|
|||
|
|
return *this;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
basic_format& basic_format::clear_bind(int argN)
|
|||
|
|
// cancel the binding of ONE argument, and clear()
|
|||
|
|
{
|
|||
|
|
if(argN<1 || argN > num_args_ || bound_.size()==0 || !bound_[argN-1] )
|
|||
|
|
{
|
|||
|
|
if( exceptions() & io::out_of_range_bit )
|
|||
|
|
boost::throw_exception(io::out_of_range()); // arg not in range.
|
|||
|
|
else return *this;
|
|||
|
|
}
|
|||
|
|
bound_[argN-1]=false;
|
|||
|
|
clear();
|
|||
|
|
return *this;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
std::string basic_format::str() const
|
|||
|
|
{
|
|||
|
|
dumped_=true;
|
|||
|
|
if(items_.size()==0)
|
|||
|
|
return prefix_;
|
|||
|
|
if( cur_arg_ < num_args_)
|
|||
|
|
if( exceptions() & io::too_few_args_bit )
|
|||
|
|
boost::throw_exception(io::too_few_args()); // not enough variables have been supplied !
|
|||
|
|
|
|||
|
|
unsigned long sz = prefix_.size();
|
|||
|
|
unsigned long i;
|
|||
|
|
for(i=0; i < items_.size(); ++i)
|
|||
|
|
sz += items_[i].res_.size() + items_[i].appendix_.size();
|
|||
|
|
string_t res;
|
|||
|
|
res.reserve(sz);
|
|||
|
|
|
|||
|
|
res += prefix_;
|
|||
|
|
for(i=0; i < items_.size(); ++i)
|
|||
|
|
{
|
|||
|
|
const format_item_t& item = items_[i];
|
|||
|
|
res += item.res_;
|
|||
|
|
if( item.argN_ == format_item_t::argN_tabulation)
|
|||
|
|
{
|
|||
|
|
BOOST_ASSERT( item.pad_scheme_ & format_item_t::tabulation);
|
|||
|
|
std::streamsize n = item.state_.width_ - res.size();
|
|||
|
|
if( n > 0 )
|
|||
|
|
res.append( n, item.state_.fill_ );
|
|||
|
|
}
|
|||
|
|
res += item.appendix_;
|
|||
|
|
}
|
|||
|
|
return res;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
namespace io {
|
|||
|
|
namespace detail {
|
|||
|
|
|
|||
|
|
template<class T>
|
|||
|
|
basic_format& bind_arg_body( basic_format& self,
|
|||
|
|
int argN,
|
|||
|
|
const T& val)
|
|||
|
|
// bind one argument to a fixed value
|
|||
|
|
// this is persistent over clear() calls, thus also over str() and <<
|
|||
|
|
{
|
|||
|
|
if(self.dumped_) self.clear(); // needed, because we will modify cur_arg_..
|
|||
|
|
if(argN<1 || argN > self.num_args_)
|
|||
|
|
{
|
|||
|
|
if( self.exceptions() & io::out_of_range_bit )
|
|||
|
|
boost::throw_exception(io::out_of_range()); // arg not in range.
|
|||
|
|
else return self;
|
|||
|
|
}
|
|||
|
|
if(self.bound_.size()==0)
|
|||
|
|
self.bound_.assign(self.num_args_,false);
|
|||
|
|
else
|
|||
|
|
BOOST_ASSERT( self.num_args_ == static_cast<signed int>(self.bound_.size()) );
|
|||
|
|
int o_cur_arg = self.cur_arg_;
|
|||
|
|
self.cur_arg_ = argN-1; // arrays begin at 0
|
|||
|
|
|
|||
|
|
self.bound_[self.cur_arg_]=false; // if already set, we unset and re-sets..
|
|||
|
|
self.operator%(val); // put val at the right place, because cur_arg is set
|
|||
|
|
|
|||
|
|
|
|||
|
|
// Now re-position cur_arg before leaving :
|
|||
|
|
self.cur_arg_ = o_cur_arg;
|
|||
|
|
self.bound_[argN-1]=true;
|
|||
|
|
if(self.cur_arg_ == argN-1 )
|
|||
|
|
// hum, now this arg is bound, so move to next free arg
|
|||
|
|
{
|
|||
|
|
while(self.cur_arg_ < self.num_args_ && self.bound_[self.cur_arg_]) ++self.cur_arg_;
|
|||
|
|
}
|
|||
|
|
// In any case, we either have all args, or are on a non-binded arg :
|
|||
|
|
BOOST_ASSERT( self.cur_arg_ >= self.num_args_ || ! self.bound_[self.cur_arg_]);
|
|||
|
|
return self;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
template<class T>
|
|||
|
|
basic_format& modify_item_body( basic_format& self,
|
|||
|
|
int itemN,
|
|||
|
|
const T& manipulator)
|
|||
|
|
// applies a manipulator to the format_item describing a given directive.
|
|||
|
|
// this is a permanent change, clear or clear_binds won't cancel that.
|
|||
|
|
{
|
|||
|
|
if(itemN<1 || itemN >= static_cast<signed int>(self.items_.size() ))
|
|||
|
|
{
|
|||
|
|
if( self.exceptions() & io::out_of_range_bit )
|
|||
|
|
boost::throw_exception(io::out_of_range()); // item not in range.
|
|||
|
|
else return self;
|
|||
|
|
}
|
|||
|
|
self.items_[itemN-1].ref_state_.apply_manip( manipulator );
|
|||
|
|
self.items_[itemN-1].state_ = self.items_[itemN-1].ref_state_;
|
|||
|
|
return self;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
} // namespace detail
|
|||
|
|
|
|||
|
|
} // namespace io
|
|||
|
|
|
|||
|
|
} // namespace boost
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
#endif // BOOST_FORMAT_IMPLEMENTATION_HPP
|