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/*************************************************************************
** StreamWriter.cpp **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2012 Martin Gieseking <martin.gieseking@uos.de> **
** **
** 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 3 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, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#include "CRC32.h"
#include "StreamWriter.h"
using namespace std;
/** Writes an unsigned integer to the output stream.
* @param[in] val the value to write
* @param[in] n number of bytes to be considered */
void StreamWriter::writeUnsigned (UInt32 val, int n) {
for (n--; n >= 0; n--)
_os.put((val >> (8*n)) & 0xff);
}
/** Writes a signed integer to the output stream.
* @param[in] val the value to write
* @param[in] n number of bytes to be considered */
void StreamWriter::writeSigned (Int32 val, int n) {
writeUnsigned((UInt32)val, n);
}
/** Writes a signed integer to the output stream.
* @param[in] val the value to write
* @param[in] finalZero if true, a final 0-byte is appended */
void StreamWriter::writeString (const string &str, bool finalZero) {
for (size_t i=0; i < str.length(); i++)
_os.put(str[i]);
if (finalZero)
_os.put(0);
}
/** Writes an unsigned integer to the output stream.
* @param[in] val the value to write
* @param[in] n number of bytes to be considered
* @param[in,out] crc32 checksum to be updated */
void StreamWriter::writeUnsigned (UInt32 val, int n, CRC32 &crc32) {
writeUnsigned(val, n);
crc32.update(val, n);
}
/** Writes a signed integer to the output stream and updates the CRC32 checksum.
* @param[in] val the value to write
* @param[in] n number of bytes to be considered
* @param[in,out] crc32 checksum to be updated */
void StreamWriter::writeSigned (Int32 val, int n, CRC32 &crc32) {
writeUnsigned((UInt32)val, n, crc32);
}
/** Writes a string to the output stream and updates the CRC32 checksum.
* @param[in] str the string to write
* @param[in,out] crc32 checksum to be updated
* @param[in] finalZero if true, a final 0-byte is appended */
void StreamWriter::writeString (const std::string &str, CRC32 &crc32, bool finalZero) {
writeString(str, finalZero);
crc32.update((const UInt8*)str.c_str(), str.length() + (finalZero ? 1 : 0));
}
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