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101 lines
3.9 KiB
101 lines
3.9 KiB
////////////////////////////////////////////////////////////////////////////
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// Copyright KAZ 2021 //
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// //
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// contact (at) kaz.bzh //
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// //
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// This software is a filter to shrink email by attachment extraction. //
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// //
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// This software is governed by the CeCILL-B license under French law and //
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// abiding by the rules of distribution of free software. You can use, //
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// modify and/or redistribute the software under the terms of the //
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// CeCILL-B license as circulated by CEA, CNRS and INRIA at the following //
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// URL "http://www.cecill.info". //
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// //
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// As a counterpart to the access to the source code and rights to copy, //
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// modify and redistribute granted by the license, users are provided //
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// only with a limited warranty and the software's author, the holder of //
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// the economic rights, and the successive licensors have only limited //
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// liability. //
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// //
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// In this respect, the user's attention is drawn to the risks associated //
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// with loading, using, modifying and/or developing or reproducing the //
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// software by the user in light of its specific status of free software, //
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// that may mean that it is complicated to manipulate, and that also //
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// therefore means that it is reserved for developers and experienced //
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// professionals having in-depth computer knowledge. Users are therefore //
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// encouraged to load and test the software's suitability as regards //
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// their requirements in conditions enabling the security of their //
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// systems and/or data to be ensured and, more generally, to use and //
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// operate it in the same conditions as regards security. //
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// //
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// The fact that you are presently reading this means that you have had //
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// knowledge of the CeCILL-B license and that you accept its terms. //
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////////////////////////////////////////////////////////////////////////////
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#include <regex>
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#include <boost/format.hpp>
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#include <boost/lexical_cast.hpp>
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#include "kazDebug.hpp"
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#include "SizeArg.hpp"
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using namespace std;
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using namespace kaz;
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// ================================================================================
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SizeArg::SizeArg (const size_t &bytes)
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: bytes (bytes) {
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}
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SizeArg::SizeArg (const string &option)
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: bytes (0) {
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init (option);
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}
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void
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SizeArg::init (const string &token) {
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DEF_LOG ("SizeArg::init", "token: " << token);
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static const string prefix ("KMGTPEZY");
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static const regex formatRegEx ("([0-9]+) *([k"+prefix+"]?)(i?)");
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if (!regex_match (token.begin (), token.end (), formatRegEx))
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throw invalid_argument ("Bad size");
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bytes = boost::lexical_cast<uint64_t> (regex_replace (token, formatRegEx, "$1"));
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const string v2 (regex_replace (token, formatRegEx, "$2"));
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size_t index = prefix.find (v2);
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if (v2.length ()) {
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if (index == string::npos)
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index = 0; // "k" case
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++index;
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}
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bytes *= pow (regex_replace (token, formatRegEx, "$3").empty () ? 1000 : 1024, index);
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LOG ("token:" << token << " index:" << index << " v2:<" << v2 << ">" << " b:" << bytes);
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}
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// ================================================================================
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ostream &
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kaz::operator << (ostream &out, const SizeArg &sizeArg) {
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static string sizes [] = {"", "Ki", "Mi", "Gi", "Ti", "Pi", "Ei", "Zi", "Yi"};
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if (!sizeArg.bytes)
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return out << "0 byte";
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int nbBytes = (int) floor (log (sizeArg.bytes) / log (1024));
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double val ((sizeArg.bytes / pow (1024, nbBytes)));
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return out << boost::str (boost::format(nbBytes ? "%.2f " : val == 1 ? "%.0f byte" : + "%.0f bytes") % val) + sizes [nbBytes];
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}
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istream &
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kaz::operator >> (istream &in, SizeArg &sizeArg) {
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string token;
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in >> token;
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try {
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sizeArg.init (token);
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} catch (...) {
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in.setstate (ios_base::failbit);
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}
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return in;
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}
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// ================================================================================
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