MrSID Decode SDK for Raster Reference Manual 9.5.4.4709

- Main Page
- Namespaces
- Classes
- Files
- Examples

UsingStreams.cpp
/* $Id$ */
/* //////////////////////////////////////////////////////////////////////////
// //
// This code is Copyright (c) 2008 LizardTech, Inc, 1008 Western Avenue, //
// Suite 200, Seattle, WA 98104. Unauthorized use or distribution //
// prohibited. Access to and use of this code is permitted only under //
// license from LizardTech, Inc. Portions of the code are protected by //
// US and foreign patents and other filings. All Rights Reserved. //
// //
/* PUBLIC */
// This example shows some of the basic operations supported by
// the LTIOStreamInf class.
#include "main.h"
#include "support.h"
#include "lt_ioFileStream.h"
#include "lt_ioSubStream.h"
LT_USE_NAMESPACE(LizardTech);
LT_STATUS UsingStreams()
{
LT_STATUS sts = LT_STS_Uninit;
// make and open a file-based stream
LTIOFileStream stream;
TEST_SUCCESS(stream.initialize(INPUT_PATH("meg.hdr"), "r"));
TEST_SUCCESS(stream.open());
// read the first five bytes
lt_uint8 buf[5];
TEST_BOOL(stream.read(buf, 5) == 5);
TEST_BOOL(memcmp(buf, "NROWS", 5)==0);
// seek ahead two bytes
TEST_SUCCESS(stream.seek(2, LTIO_SEEK_DIR_CUR));
TEST_BOOL(stream.tell() == 7);
// read two more bytes
TEST_BOOL(stream.read(buf, 2) == 2);
TEST_BOOL(memcmp(buf, "80", 2) == 0);
// all done
TEST_SUCCESS(stream.close());
//
// now test the substream class
//
TEST_SUCCESS(stream.open());
LTIOSubStream substream;
TEST_SUCCESS(substream.initialize(&stream, 7, 9, false));
TEST_SUCCESS(substream.open());
TEST_BOOL(substream.read(buf, 2) == 2);
TEST_BOOL(memcmp(buf, "80", 2)==0);
TEST_BOOL(stream.tell() == 9);
TEST_BOOL(substream.tell() == 2);
substream.close();
stream.close();
return LT_STS_Success;
}

LizardTech