/*
* Copyright (C) 2004-2018 Exiv2 authors
* This program is part of the Exiv2 distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA.
*/
#include "image_int.hpp"
#include <cstdarg>
#include <cstddef>
#include <cstring>
#include <vector>
#include <cstdio>
namespace Exiv2
{
namespace Internal
{
std::string stringFormat(const char* format, ...)
{
std::string result;
std::vector<char> buffer;
size_t need = std::strlen(format)*8; // initial guess
int rc = -1;
// vsnprintf writes at most size (2nd parameter) bytes (including \0)
// returns the number of bytes required for the formatted string excluding \0
// the following loop goes through:
// one iteration (if 'need' was large enough for the for formatted string)
// or two iterations (after the first call to vsnprintf we know the required length)
do {
buffer.resize(need + 1);
va_list args; // variable arg list
va_start(args, format); // args start after format
rc = vsnprintf(&buffer[0], buffer.size(), format, args);
va_end(args); // free the args
assert(rc >= 0); // rc < 0 => we have made an error in the format string
if (rc > 0)
need = static_cast<size_t>(rc);
} while (buffer.size() <= need);
if (rc > 0)
result = std::string(&buffer[0], need);
return result;
}
std::string binaryToHex(const byte* data, size_t size)
{
std::stringstream hexOutput;
unsigned long tl = (unsigned long)((size / 16) * 16);
unsigned long tl_offset = (unsigned long)(size - tl);
for (unsigned long loop = 0; loop < (unsigned long)size; loop++) {
if (data[loop] < 16) {
hexOutput << "0";
}
hexOutput << std::hex << (int)data[loop];
if ((loop % 8) == 7) {
hexOutput << " ";
}
if ((loop % 16) == 15 || loop == (tl + tl_offset - 1)) {
int max = 15;
if (loop >= tl) {
max = tl_offset - 1;
for (int offset = 0; offset < (int)(16 - tl_offset); offset++) {
if ((offset % 8) == 7) {
hexOutput << " ";
}
hexOutput << " ";
}
}
hexOutput << " ";
for (int offset = max; offset >= 0; offset--) {
if (offset == (max - 8)) {
hexOutput << " ";
}
byte c = '.';
if (data[loop - offset] >= 0x20 && data[loop - offset] <= 0x7E) {
c = data[loop - offset];
}
hexOutput << (char)c;
}
hexOutput << std::endl;
}
}
hexOutput << std::endl << std::endl << std::endl;
return hexOutput.str();
}
std::string indent(int32_t d)
{
std::string result;
if (d > 0)
while (d--)
result += " ";
return result;
}
} // namespace Internal
} // namespace Exiv2