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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* libcdr
* Version: MPL 1.1 / GPLv2+ / LGPLv2+
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License or as specified alternatively below. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Major Contributor(s):
* Copyright (C) 2012 Fridrich Strba <fridrich.strba@bluewin.ch>
* Copyright (C) 2011 Eilidh McAdam <tibbylickle@gmail.com>
*
*
* All Rights Reserved.
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPLv2+"), or
* the GNU Lesser General Public License Version 2 or later (the "LGPLv2+"),
* in which case the provisions of the GPLv2+ or the LGPLv2+ are applicable
* instead of those above.
*/
#include "libcdr_utils.h"
#define CDR_NUM_ELEMENTS(array) sizeof(array)/sizeof(array[0])
uint8_t libcdr::readU8(WPXInputStream *input, bool /* bigEndian */)
{
if (!input || input->atEOS())
{
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
unsigned long numBytesRead;
uint8_t const *p = input->read(sizeof(uint8_t), numBytesRead);
if (p && numBytesRead == sizeof(uint8_t))
return *(uint8_t const *)(p);
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
uint16_t libcdr::readU16(WPXInputStream *input, bool bigEndian)
{
if (!input || input->atEOS())
{
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
unsigned long numBytesRead;
uint8_t const *p = input->read(sizeof(uint16_t), numBytesRead);
if (p && numBytesRead == sizeof(uint16_t))
{
if (bigEndian)
return (uint16_t)p[1]|((uint16_t)p[0]<<8);
return (uint16_t)p[0]|((uint16_t)p[1]<<8);
}
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
int16_t libcdr::readS16(WPXInputStream *input, bool bigEndian)
{
return (int16_t)readU16(input, bigEndian);
}
uint32_t libcdr::readU32(WPXInputStream *input, bool bigEndian)
{
if (!input || input->atEOS())
{
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
unsigned long numBytesRead;
uint8_t const *p = input->read(sizeof(uint32_t), numBytesRead);
if (p && numBytesRead == sizeof(uint32_t))
{
if (bigEndian)
return (uint32_t)p[3]|((uint32_t)p[2]<<8)|((uint32_t)p[1]<<16)|((uint32_t)p[0]<<24);
return (uint32_t)p[0]|((uint32_t)p[1]<<8)|((uint32_t)p[2]<<16)|((uint32_t)p[3]<<24);
}
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
int32_t libcdr::readS32(WPXInputStream *input, bool bigEndian)
{
return (int32_t)readU32(input, bigEndian);
}
uint64_t libcdr::readU64(WPXInputStream *input, bool bigEndian)
{
if (!input || input->atEOS())
{
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
unsigned long numBytesRead;
uint8_t const *p = input->read(sizeof(uint64_t), numBytesRead);
if (p && numBytesRead == sizeof(uint64_t))
{
if (bigEndian)
return (uint64_t)p[7]|((uint64_t)p[6]<<8)|((uint64_t)p[5]<<16)|((uint64_t)p[4]<<24)|((uint64_t)p[3]<<32)|((uint64_t)p[2]<<40)|((uint64_t)p[1]<<48)|((uint64_t)p[0]<<56);
return (uint64_t)p[0]|((uint64_t)p[1]<<8)|((uint64_t)p[2]<<16)|((uint64_t)p[3]<<24)|((uint64_t)p[4]<<32)|((uint64_t)p[5]<<40)|((uint64_t)p[6]<<48)|((uint64_t)p[7]<<56);
}
CDR_DEBUG_MSG(("Throwing EndOfStreamException\n"));
throw EndOfStreamException();
}
double libcdr::readDouble(WPXInputStream *input, bool bigEndian)
{
union
{
uint64_t u;
double d;
} tmpUnion;
tmpUnion.u = readU64(input, bigEndian);
return tmpUnion.d;
}
double libcdr::readFixedPoint(WPXInputStream *input, bool bigEndian)
{
unsigned fixedPointNumber = readU32(input, bigEndian);
short fixedPointNumberIntegerPart = (short)((fixedPointNumber & 0xFFFF0000) >> 16);
double fixedPointNumberFractionalPart = (double)((double)(fixedPointNumber & 0x0000FFFF)/(double)0xFFFF);
return ((double)fixedPointNumberIntegerPart + fixedPointNumberFractionalPart);
}
int libcdr::cdr_round(double d)
{
return (d>0) ? int(d+0.5) : int(d-0.5);
}
void libcdr::writeU16(WPXBinaryData &buffer, const int value)
{
buffer.append((unsigned char)(value & 0xFF));
buffer.append((unsigned char)((value >> 8) & 0xFF));
}
void libcdr::writeU32(WPXBinaryData &buffer, const int value)
{
buffer.append((unsigned char)(value & 0xFF));
buffer.append((unsigned char)((value >> 8) & 0xFF));
buffer.append((unsigned char)((value >> 16) & 0xFF));
buffer.append((unsigned char)((value >> 24) & 0xFF));
}
void libcdr::writeU8(WPXBinaryData &buffer, const int value)
{
buffer.append((unsigned char)(value & 0xFF));
}
#ifdef DEBUG
const char *libcdr::toFourCC(unsigned value, bool bigEndian)
{
static char sValue[5] = { 0, 0, 0, 0, 0 };
if (bigEndian)
{
sValue[3] = value & 0xff;
sValue[2] = (value & 0xff00) >> 8;
sValue[1] = (value & 0xff0000) >> 16;
sValue[0] = (value & 0xff000000) >> 24;
}
else
{
sValue[0] = value & 0xff;
sValue[1] = (value & 0xff00) >> 8;
sValue[2] = (value & 0xff0000) >> 16;
sValue[3] = (value & 0xff000000) >> 24;
}
return sValue;
}
#endif
/* vim:set shiftwidth=2 softtabstop=2 expandtab: */
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