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// Copyright (C) 2005 Nathaniel Smith <njs@pobox.com>
//
// This program is made available under the GNU GPL version 2.0 or
// greater. See the accompanying file COPYING for details.
//
// This program is distributed WITHOUT ANY WARRANTY; without even the
// implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
// PURPOSE.
#include "base.hh"
#include <iterator>
#include <sstream>
#include <algorithm>
#include <iterator>
#include "inodeprint.hh"
#include "sanity.hh"
#include "platform.hh"
#include "transforms.hh"
#include "constants.hh"
#include "basic_io.hh"
#include "botan/botan.h"
#include "botan/sha160.h"
using std::ostream;
using std::ostringstream;
using std::string;
// this file defines the inodeprint_map structure, and some operations on it.
namespace
{
namespace syms
{
// roster symbols
symbol const format_version("format_version");
symbol const file("file");
symbol const print("print");
}
}
// reading inodeprint_maps
void
read_inodeprint_map(data const & dat,
inodeprint_map & ipm)
{
// don't bomb out if it's just an old-style inodeprints file
string start = dat().substr(0, syms::format_version().size());
if (start != syms::format_version())
{
L(FL("inodeprints file format is wrong, skipping it"));
return;
}
basic_io::input_source src(dat(), "inodeprint");
basic_io::tokenizer tok(src);
basic_io::parser pa(tok);
{
pa.esym(syms::format_version);
string vers;
pa.str(vers);
if (vers != "1")
{
L(FL("inodeprints file version is unknown, skipping it"));
return;
}
}
while(pa.symp())
{
string path, print;
pa.esym(syms::file);
pa.str(path);
pa.esym(syms::print);
pa.hex(print);
ipm.insert(inodeprint_entry(file_path_internal(path),
hexenc<inodeprint>(print)));
}
I(src.lookahead == EOF);
}
void
write_inodeprint_map(inodeprint_map const & ipm,
data & dat)
{
basic_io::printer pr;
{
basic_io::stanza st;
st.push_str_pair(syms::format_version, "1");
pr.print_stanza(st);
}
for (inodeprint_map::const_iterator i = ipm.begin();
i != ipm.end(); ++i)
{
basic_io::stanza st;
st.push_file_pair(syms::file, i->first);
st.push_hex_pair(syms::print, hexenc<id>(i->second()));
pr.print_stanza(st);
}
dat = data(pr.buf);
}
class my_iprint_calc : public inodeprint_calculator
{
std::string res;
Botan::SHA_160 hash;
bool too_close;
void add_item(void *dat, size_t size)
{
hash.update(reinterpret_cast<Botan::byte const *>(&size),
sizeof(size));
hash.update(reinterpret_cast<Botan::byte const *>(dat),
size);
}
public:
my_iprint_calc() : too_close(false)
{}
std::string str()
{
char digest[constants::sha1_digest_length];
hash.final(reinterpret_cast<Botan::byte *>(digest));
return std::string(digest, constants::sha1_digest_length);
}
void note_nowish(bool n)
{
too_close = n;
}
void note_future(bool f)
{
inodeprint_calculator::add_item(f);
}
bool ok()
{
return !too_close;
}
};
bool inodeprint_file(file_path const & file, hexenc<inodeprint> & ip)
{
my_iprint_calc calc;
bool ret = inodeprint_file(file.as_external(), calc);
inodeprint ip_raw(calc.str());
if (!ret)
ip_raw = inodeprint("");
encode_hexenc(ip_raw, ip);
return ret && calc.ok();
}
// Local Variables:
// mode: C++
// fill-column: 76
// c-file-style: "gnu"
// indent-tabs-mode: nil
// End:
// vim: et:sw=2:sts=2:ts=2:cino=>2s,{s,\:s,+s,t0,g0,^-2,e-2,n-2,p2s,(0,=s:
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