Format.cc

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00001 // $Id: Format.cc 1742 2010-11-04 14:51:56Z g0dil $
00002 //
00003 // Copyright (C) 2009
00004 // Fraunhofer (FOKUS)
00005 // Competence Center NETwork research (NET), St. Augustin, GERMANY
00006 //     Stefan Bund <g0dil@berlios.de>
00007 //
00008 // This program is free software; you can redistribute it and/or modify
00009 // it under the terms of the GNU General Public License as published by
00010 // the Free Software Foundation; either version 2 of the License, or
00011 // (at your option) any later version.
00012 //
00013 // This program is distributed in the hope that it will be useful,
00014 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00015 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016 // GNU General Public License for more details.
00017 //
00018 // You should have received a copy of the GNU General Public License
00019 // along with this program; if not, write to the
00020 // Free Software Foundation, Inc.,
00021 // 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00022 
00026 #include "Format.hh"
00027 #include "Format.ih"
00028 
00029 // Custom includes
00030 #include <cmath>
00031 #include <boost/io/ios_state.hpp>
00032 #include <iomanip>
00033 #include <sstream>
00034 
00035 //#include "Format.mpp"
00036 #define prefix_
00037 //-/////////////////////////////////////////////////////////////////////////////////////////////////
00038 
00039 namespace {
00040 
00041     char const SIPrefix[] = { 'y', 'z', 'a', 'f', 'p', 'n', 'u', 'm',
00042                               ' ',
00043                               'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' };
00044     unsigned const SIScales = 8;
00045 
00046 }
00047 
00048 prefix_ std::ostream & senf::format::operator<<(std::ostream & os, eng const & v_)
00049 {
00050     boost::io::ios_base_all_saver ibas (os);
00051     boost::io::ios_fill_saver ifs (os);
00052 
00053     os.setf(v_.flags_, v_.mask_);
00054     if (v_.havePrecision_)
00055         os.precision(v_.precision_);
00056     if (v_.haveWidth_)
00057         os.width(v_.width_);
00058     if (v_.haveFill_)
00059         os.fill(v_.fill_);
00060 
00061     unsigned prec (os.precision());
00062     if (prec < 4)
00063         prec = 4;
00064     unsigned w (os.width());
00065     char fill (os.fill());
00066     unsigned minw (prec+2+((os.flags() & std::ios_base::showbase) ? 1 : 4));
00067     std::ios_base::fmtflags flags (os.flags());
00068     std::ios_base::fmtflags align (flags & std::ios_base::adjustfield);
00069     if (! std::isnan(v_.d_))
00070         minw += prec+3;
00071 
00072     float ref (std::fabs(v_.v_));
00073     float v (v_.v_);
00074     float d (0.0);
00075     if (! std::isnan(v_.d_)) d = std::fabs(v_.d_);
00076     int scale (0);
00077 
00078     if (d > ref) ref = d;
00079     while (ref >= 1000.0) {
00080         ref /= 1000.0;
00081         v /= 1000.0;
00082         d /= 1000.0;
00083         scale += 3;
00084     }
00085     while (ref > 0 && ref < 1) {
00086         ref *= 1000.0;
00087         v *= 1000.0;
00088         d *= 1000.0;
00089         scale -= 3;
00090     }
00091 
00092     os << std::dec << std::setprecision(prec-3) << std::fixed;
00093     if (w > 0) {
00094         if ((align == 0 || align == std::ios_base::right || align == std::ios_base::internal))
00095             os << std::setw(prec+2+(w>minw ? w-minw : 0));
00096         else
00097             os << std::right << std::setfill(' ') << std::setw(prec+2);
00098     }
00099     else
00100         os << std::right;
00101     os << v;
00102 
00103     os << std::setfill('0') << std::noshowpos;
00104     if (! std::isnan(v_.d_)) {
00105         os << "+-";
00106         if (w > 0)
00107             os << std::setw(prec+1);
00108         os << d;
00109     }
00110 
00111     if ((flags & std::ios_base::showbase) && unsigned(std::abs(scale/3)) <= SIScales) {
00112         if (w > 0 || scale != 0)
00113             os << SIPrefix[scale/3+SIScales];
00114     }
00115     else if ((flags & std::ios_base::showpoint) || scale != 0)
00116         os << ((flags & std::ios_base::uppercase)?'E':'e')
00117            << std::showpos << std::internal << std::setw(3) << scale;
00118     else if (w > 0)
00119         os << "    ";
00120     if (w > minw && align == std::ios_base::left)
00121         os << std::setfill(fill) << std::setw(w-minw) << "";
00122 
00123     return os;
00124 }
00125 
00126 prefix_ std::string senf::format::detail::dumpintSigned(long long v, unsigned bits)
00127 {
00128     if (v<0) return dumpintUnsigned(-v,bits,-1);
00129     else     return dumpintUnsigned(v,bits,+1);
00130 }
00131 
00132 prefix_ std::string senf::format::detail::dumpintUnsigned(unsigned long long v, unsigned bits,
00133                                                           int sign)
00134 {
00135     int bytes ((bits+7)/8);
00136     int digs (int(2.4*bytes)+1);
00137     std::stringstream ss;
00138     ss << (sign ? (sign<0 ? "-" : " ") : "")
00139        << "0x" << std::setw(2*bytes) << std::setfill('0') << std::hex
00140        << 1u*v
00141        << " (" << std::setw(digs+(sign ? 1 : 0)) << std::setfill(' ') << std::dec;
00142     if (sign)
00143         ss << sign*static_cast<long long>(v);
00144     else
00145         ss << 1u*v;
00146     ss << ") (";
00147     for (int i (bytes-1); i>=0; --i) {
00148         char c ((v>>(8*i))&0xff);
00149         ss << ((c>=32 && c<=126) ? c : '.');
00150     }
00151     ss << ')';
00152     return ss.str();
00153 }
00154 
00155 unsigned int senf::format::IndentHelper::static_level = 0;
00156 
00157 
00158 //-/////////////////////////////////////////////////////////////////////////////////////////////////
00159 #undef prefix_
00160 //#include "Format.mpp"
00161 
00162 
00163 // Local Variables:
00164 // mode: c++
00165 // fill-column: 100
00166 // comment-column: 40
00167 // c-file-style: "senf"
00168 // indent-tabs-mode: nil
00169 // ispell-local-dictionary: "american"
00170 // compile-command: "scons -u test"
00171 // End:
SENF Extensible Network Framework

Format.cc
