本文整理汇总了C++中CIOBuffer::GetNext方法的典型用法代码示例。如果您正苦于以下问题：C++ CIOBuffer::GetNext方法的具体用法？C++ CIOBuffer::GetNext怎么用？C++ CIOBuffer::GetNext使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类CIOBuffer的用法示例。
在下文中一共展示了CIOBuffer::GetNext方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: ReadStreamHeader
//////////////////
//
// XPK fileformat:
// chunk-based, crunched data in chunks
//
// File header:
// starts as common IFF-style header:
// - 4-byte ID, 'XPKF'
// - 4-byte int for filesize minus header (8)
// - 4-byte sub-type (cruncher-ID) e.g. 'SQSH'
// - 4-byte int for total uncompressed length ?
// - first 16-bytes of original file
// - 1 byte for flags
// - 1 byte for header checksum ?
// - 1 byte for minor version of cruncher/library ?
// - actually version required of sub-library..
// - 1 byte for major version of cruncher/library ?
//
bool XpkTags::ReadStreamHeader(CIOBuffer &Buffer)
{
// should have enough data to actually parse file header
if (Buffer.GetSize() < sizeof(XpkStreamHeader))
{
return false;
}
if (isXpkFile(Buffer.GetBegin()) == false)
{
return false;
}
Buffer.SetCurrentPos(0); // start at beginning if not already..
// set default
m_formatType = XPKMODE_UPSTD;
// "XPKF", 0x58504b46 (XPK_COOKIE, magic number)
// note: support also XFD-packed files? ("XFDD")
m_streamHeader.xsh_PackID = GetULong(Buffer.GetNext(4));
if (m_streamHeader.xsh_PackID != MakeTag("XPKF"))
// this too ? && m_streamHeader.xsh_PackID != MakeTag("XFDD"))
{
return false;
}
// file length without IFF header (type+length = 8) ?
m_streamHeader.xsh_CompressedLen = GetULong(Buffer.GetNext(4));
// keep packer type as type name/ID,
// just access as-is
m_typeName.assign((char*)Buffer.GetAtCurrent(), 4);
// packer type, e.g. "SQSH", "NUKE", "RLEN"..
m_streamHeader.xsh_PackerType = GetULong(Buffer.GetNext(4));
// TODO: check supported types..? if != MakeTag()..
// -> caller/parent should do (knows libraries..)
// uncompressed length?
m_streamHeader.xsh_UnpackedLen = GetULong(Buffer.GetNext(4));
// first 16 bytes of original file
::memcpy(m_streamHeader.xsh_Initial, Buffer.GetNext(16), 16);
// flags
m_streamHeader.xsh_Flags = Buffer.GetNextByte();
/*
// also check "XFDD", 0x58464444 in file ID?
if (m_streamHeader.xsh_Flags & XMF_XFD && m_streamHeader.xsh_PackID == MakeTag("XFDD"))
{
m_formatType = XPKMODE_UPXFD;
}
if (m_streamHeader.xsh_Flags & XMF_PASSTHRU)
{
// unpacked?
m_formatType = XPKMODE_UPUP;
}
if (m_streamHeader.xsh_Flags & XPKSTREAMF_PASSWORD)
{
// password-protected file?
}
*/
// ..no idea.. header checksum?
m_streamHeader.xsh_HeaderChk = Buffer.GetNextByte();
// minor&major version of XPK master/cruncher?
m_streamHeader.xsh_SubVrs = Buffer.GetNextByte(); // sub-library version required?
m_streamHeader.xsh_MasVrs = Buffer.GetNextByte();
// TODO: remove later, debug-test..
if (Buffer.GetCurrentPos() != sizeof(XpkStreamHeader))
{
throw IOException("Read size does not match stream-header size");
}
// non-zero header checksum? (note where doing checksumming..)
//.........这里部分代码省略.........