diff -r 000000000000 -r bde4ae8d615e os/ossrv/ossrv_pub/boost_apis/boost/format/internals.hpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/os/ossrv/ossrv_pub/boost_apis/boost/format/internals.hpp Fri Jun 15 03:10:57 2012 +0200 @@ -0,0 +1,199 @@ +// ---------------------------------------------------------------------------- +// internals.hpp : internal structs : stream_format_state, format_item. +// included by format.hpp +// ---------------------------------------------------------------------------- + +// 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_INTERNALS_HPP +#define BOOST_FORMAT_INTERNALS_HPP + + +#include +#include +#include +#include +#include +#include // used as a dummy stream + +namespace boost { +namespace io { +namespace detail { + + +//---- stream_format_state --------------------------------------------------// + +// set of params that define the format state of a stream + template + struct stream_format_state + { + typedef BOOST_IO_STD basic_ios basic_ios; + + stream_format_state(Ch fill) { reset(fill); } +// stream_format_state(const basic_ios& os) { set_by_stream(os); } + + void reset(Ch fill); //- sets to default state. + void set_by_stream(const basic_ios& os); //- sets to os's state. + void apply_on(basic_ios & os, //- applies format_state to the stream + boost::io::detail::locale_t * loc_default = 0) const; + template + void apply_manip(T manipulator) //- modifies state by applying manipulator + { apply_manip_body( *this, manipulator) ; } + + // --- data --- + std::streamsize width_; + std::streamsize precision_; + Ch fill_; + std::ios_base::fmtflags flags_; + std::ios_base::iostate rdstate_; + std::ios_base::iostate exceptions_; + boost::optional loc_; + }; + + +//---- format_item ---------------------------------------------------------// + +// stores all parameters that can be specified in format strings + template + struct format_item + { + enum pad_values { zeropad = 1, spacepad =2, centered=4, tabulation = 8 }; + // 1. if zeropad is set, all other bits are not, + // 2. if tabulation is set, all others are not. + // centered and spacepad can be mixed freely. + enum arg_values { argN_no_posit = -1, // non-positional directive. will set argN later + argN_tabulation = -2, // tabulation directive. (no argument read) + argN_ignored = -3 // ignored directive. (no argument read) + }; + typedef BOOST_IO_STD basic_ios basic_ios; + typedef detail::stream_format_state stream_format_state; + typedef ::std::basic_string string_type; + + format_item(Ch fill) :argN_(argN_no_posit), fmtstate_(fill), + truncate_(max_streamsize()), pad_scheme_(0) {} + void reset(Ch fill); + void compute_states(); // sets states according to truncate and pad_scheme. + + static std::streamsize max_streamsize() { + return (std::numeric_limits::max)(); + } + + // --- data --- + int argN_; //- argument number (starts at 0, eg : %1 => argN=0) + // negative values for items that don't process an argument + string_type res_; //- result of the formatting of this item + string_type appendix_; //- piece of string between this item and the next + + stream_format_state fmtstate_;// set by parsing, is only affected by modify_item + + std::streamsize truncate_;//- is set for directives like %.5s that ask truncation + unsigned int pad_scheme_;//- several possible padding schemes can mix. see pad_values + }; + + + +//--- Definitions ------------------------------------------------------------ + +// - stream_format_state:: ------------------------------------------------- + template + void stream_format_state:: apply_on (basic_ios & os, + boost::io::detail::locale_t * loc_default) const { + // set the state of this stream according to our params + if(width_ != -1) + os.width(width_); + if(precision_ != -1) + os.precision(precision_); + if(fill_ != 0) + os.fill(fill_); + os.flags(flags_); + os.clear(rdstate_); + os.exceptions(exceptions_); +#if !defined(BOOST_NO_STD_LOCALE) + if(loc_) + os.imbue(loc_.get()); + else if(loc_default) + os.imbue(*loc_default); +#endif + } + + template + void stream_format_state:: set_by_stream(const basic_ios& os) { + // set our params according to the state of this stream + flags_ = os.flags(); + width_ = os.width(); + precision_ = os.precision(); + fill_ = os.fill(); + rdstate_ = os.rdstate(); + exceptions_ = os.exceptions(); + } + + + template + void apply_manip_body( stream_format_state& self, + T manipulator) { + // modify our params according to the manipulator + basic_oaltstringstream ss; + self.apply_on( ss ); + ss << manipulator; + self.set_by_stream( ss ); + } + + template inline + void stream_format_state:: reset(Ch fill) { + // set our params to standard's default state. cf § 27.4.4.1 of the C++ norm + width_=0; precision_=6; + fill_=fill; // default is widen(' '), but we cant compute it without the locale + flags_ = std::ios_base::dec | std::ios_base::skipws; + // the adjust_field part is left equal to 0, which means right. + exceptions_ = std::ios_base::goodbit; + rdstate_ = std::ios_base::goodbit; + } + + +// --- format_item:: -------------------------------------------------------- + + template + void format_item:: + reset (Ch fill) { + argN_=argN_no_posit; truncate_ = max_streamsize(); pad_scheme_ =0; + res_.resize(0); appendix_.resize(0); + fmtstate_.reset(fill); + } + + template + void format_item:: + compute_states() { + // reflect pad_scheme_ on fmt_state_ + // because some pad_schemes has complex consequences on several state params. + if(pad_scheme_ & zeropad) { + // ignore zeropad in left alignment : + if(fmtstate_.flags_ & std::ios_base::left) { + BOOST_ASSERT(!(fmtstate_.flags_ &(std::ios_base::adjustfield ^std::ios_base::left))); + // only left bit might be set. (not right, nor internal) + pad_scheme_ = pad_scheme_ & (~zeropad); + } + else { + pad_scheme_ &= ~spacepad; // printf ignores spacepad when zeropadding + fmtstate_.fill_='0'; + fmtstate_.flags_ = (fmtstate_.flags_ & ~std::ios_base::adjustfield) + | std::ios_base::internal; + // removes all adjustfield bits, and adds internal. + } + } + if(pad_scheme_ & spacepad) { + if(fmtstate_.flags_ & std::ios_base::showpos) + pad_scheme_ &= ~spacepad; + } + } + + +} } } // namespaces boost :: io :: detail + + +#endif // BOOST_FORMAT_INTERNALS_HPP