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#include <chrono>
#include <iomanip>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "misc.h"
using namespace std;
string
percent_encode (const string &raw)
{
ostringstream outbuf;
outbuf.fill('0');
outbuf.setf(ios::hex, ios::basefield);
for (char c : raw) {
if (isalnum (c) || (c >= '+' && c <= '.')
|| c == '_' || c == '@' || c == '=')
outbuf << c;
else
outbuf << '%' << setw(2) << int (uint8_t (c));
}
return outbuf.str ();
}
inline int
hexdigit (char c)
{
if (c >= '0' && c <= '9')
return c - '0';
else if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
else
throw runtime_error ("precent_decode: illegal hexdigit " + string (1, c));
}
string
percent_decode (const string &encoded)
{
ostringstream outbuf;
int escape_pos = 0, escape_val = 0;
for (char c : encoded) {
switch (escape_pos) {
case 0:
if (c == '%')
escape_pos = 1;
else
outbuf << c;
break;
case 1:
escape_val = hexdigit(c) << 4;
escape_pos = 2;
break;
case 2:
escape_pos = 0;
outbuf << char (escape_val | hexdigit(c));
break;
}
}
if (escape_pos)
throw runtime_error ("percent_decode: incomplete escape");
return outbuf.str();
}
std::istream &
input_match (std::istream &in, char want)
{
char got;
if ((in >> got) && got != want)
in.setstate (std::ios_base::failbit);
return in;
}
bool
hash_ok (const string &hash)
{
if (hash.size() != 2*hash_ctx::output_bytes)
return false;
for (char c : hash)
if (c < '0' || c > 'f' || (c > '9' && c < 'a'))
return false;
return true;
}
static string
hexdump (const string &s)
{
ostringstream os;
os << hex << setfill('0');
for (auto c : s)
os << setw(2) << (int (c) & 0xff);
string ret = os.str();
if (ret.size() != 2 * s.size()) {
cerr << ret.size() << " != 2 * " << s.size () << "\n";
cerr << "s[0] == " << hex << unsigned (s[0]) << ", s.back() = "
<< unsigned (s.back()) << "\n";
terminate();
}
return ret;
}
string
hash_ctx::final()
{
unsigned char resbuf[output_bytes];
SHA1_Final (resbuf, &ctx_);
return hexdump ({ reinterpret_cast<const char *> (resbuf), sizeof (resbuf) });
}
using stp = std::chrono::time_point<std::chrono::steady_clock>;
stp start_time_stamp{stp::clock::now()};
stp last_time_stamp{start_time_stamp};
void
print_time (string msg)
{
using namespace std::chrono;
stp now = stp::clock::now();
if (opt_verbose > 0) {
auto oldFlags = cerr.flags();
cerr.setf (ios::fixed, ios::floatfield);
cerr << msg << "... " << duration<double>(now - start_time_stamp).count()
<< " (+" << duration<double>(now - last_time_stamp).count() << ")\n";
cerr.flags (oldFlags);
}
last_time_stamp = now;
}
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