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Beta match MXIOINFO (#853)
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GitHub
parent
612eec6889
commit
a9d67e4dd7
2 changed files with 212 additions and 76 deletions
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@ -18,11 +18,13 @@ class MXIOINFO {
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MxU16 Open(const char*, MxULong);
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MxU16 Close(MxLong);
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MxLong Read(void*, MxLong);
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MxLong Write(void*, MxLong);
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MxLong Seek(MxLong, MxLong);
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MxU16 SetBuffer(char*, MxLong, MxLong);
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MxU16 Flush(MxU16);
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MxU16 Advance(MxU16);
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MxU16 Descend(MMCKINFO*, const MMCKINFO*, MxU16);
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MxU16 Ascend(MMCKINFO*, MxU16);
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// NOTE: In MXIOINFO, the `hmmio` member of MMIOINFO is used like
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// an HFILE (int) instead of an HMMIO (WORD).
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@ -2,56 +2,63 @@
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#include "decomp.h"
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#include <assert.h>
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// This class should be 72 bytes in size, same as the MMIOINFO struct.
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// The current implementation has MMIOINFO as the only member of the class,
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// but this assert will enforce the size if we decide to change that.
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DECOMP_SIZE_ASSERT(MXIOINFO, sizeof(MMIOINFO));
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// FUNCTION: LEGO1 0x100cc800
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// FUNCTION: BETA10 0x1015e140
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MXIOINFO::MXIOINFO()
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{
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memset(&m_info, 0, sizeof(m_info));
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}
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// FUNCTION: LEGO1 0x100cc820
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// FUNCTION: BETA10 0x1015e169
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MXIOINFO::~MXIOINFO()
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{
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Close(0);
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}
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// FUNCTION: LEGO1 0x100cc830
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// FUNCTION: BETA10 0x1015e189
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MxU16 MXIOINFO::Open(const char* p_filename, MxULong p_flags)
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{
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OFSTRUCT unused;
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MxU16 result = 0;
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m_info.lBufOffset = 0;
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m_info.lDiskOffset = 0;
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m_info.lDiskOffset = m_info.lBufOffset = 0;
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// DECOMP: Cast of p_flags to u16 forces the `movzx` instruction
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m_info.hmmio = (HMMIO) OpenFile(p_filename, &unused, (MxU16) p_flags);
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if ((HFILE) m_info.hmmio != HFILE_ERROR) {
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m_info.dwFlags = p_flags;
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if (p_flags & MMIO_ALLOCBUF) {
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if (m_info.dwFlags & MMIO_ALLOCBUF) {
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// Default buffer length of 8k if none specified
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MxLong len = m_info.cchBuffer ? m_info.cchBuffer : 8192;
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HPSTR buf = new char[len];
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MxLong len = m_info.cchBuffer;
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if (len == 0) {
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len = 8192;
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}
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char* buf = new char[len];
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if (!buf) {
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result = MMIOERR_OUTOFMEMORY;
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m_info.cchBuffer = 0;
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m_info.dwFlags &= ~MMIO_ALLOCBUF;
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m_info.cchBuffer = 0;
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m_info.pchBuffer = 0;
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result = MMIOERR_OUTOFMEMORY;
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}
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else {
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m_info.pchBuffer = buf;
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m_info.cchBuffer = len;
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m_info.pchBuffer = (HPSTR) buf;
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}
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m_info.pchEndRead = m_info.pchBuffer;
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m_info.pchNext = m_info.pchBuffer;
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m_info.pchNext = m_info.pchEndRead = m_info.pchBuffer;
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m_info.pchEndWrite = m_info.pchBuffer + m_info.cchBuffer;
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}
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}
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@ -63,6 +70,7 @@ MxU16 MXIOINFO::Open(const char* p_filename, MxULong p_flags)
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}
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// FUNCTION: LEGO1 0x100cc8e0
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// FUNCTION: BETA10 0x1015e30b
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MxU16 MXIOINFO::Close(MxLong p_unused)
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{
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MxU16 result = 0;
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@ -76,9 +84,7 @@ MxU16 MXIOINFO::Close(MxLong p_unused)
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delete[] m_info.pchBuffer;
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}
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m_info.pchEndWrite = 0;
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m_info.pchEndRead = 0;
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m_info.pchBuffer = 0;
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m_info.pchBuffer = m_info.pchEndRead = m_info.pchEndWrite = NULL;
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m_info.dwFlags = 0;
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}
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@ -86,6 +92,7 @@ MxU16 MXIOINFO::Close(MxLong p_unused)
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}
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// FUNCTION: LEGO1 0x100cc930
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// FUNCTION: BETA10 0x1015e3b2
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MxLong MXIOINFO::Read(void* p_buf, MxLong p_len)
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{
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MxLong bytesRead = 0;
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@ -101,22 +108,25 @@ MxLong MXIOINFO::Read(void* p_buf, MxLong p_len)
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}
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memcpy(p_buf, m_info.pchNext, bytesLeft);
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p_len -= bytesLeft;
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m_info.pchNext += bytesLeft;
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bytesRead += bytesLeft;
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p_len -= bytesLeft;
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}
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if (p_len <= 0 || Advance(0)) {
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if (p_len > 0) {
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if (Advance(MMIO_READ)) {
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break;
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}
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else {
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bytesLeft = m_info.pchEndRead - m_info.pchNext;
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if (bytesLeft <= 0) {
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break;
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}
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}
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}
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}
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}
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else if (m_info.hmmio && p_len > 0) {
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bytesRead = _hread((HFILE) m_info.hmmio, p_buf, p_len);
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@ -132,10 +142,69 @@ MxLong MXIOINFO::Read(void* p_buf, MxLong p_len)
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return bytesRead;
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}
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// FUNCTION: BETA10 0x1015e4fc
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MxLong MXIOINFO::Write(void* p_buf, MxLong p_len)
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{
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MxLong bytesWritten = 0;
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if (m_info.pchBuffer) {
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MxLong bytesLeft = m_info.pchEndWrite - m_info.pchNext;
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while (p_len > 0) {
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if (bytesLeft > 0) {
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if (p_len < bytesLeft) {
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bytesLeft = p_len;
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}
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memcpy(m_info.pchNext, p_buf, bytesLeft);
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m_info.dwFlags |= MMIO_DIRTY;
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m_info.pchNext += bytesLeft;
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bytesWritten += bytesLeft;
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p_len -= bytesLeft;
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}
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if (p_len > 0) {
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if (Advance(MMIO_WRITE)) {
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assert(0);
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break;
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}
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else {
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bytesLeft = m_info.pchEndWrite - m_info.pchNext;
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if (bytesLeft <= 0) {
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assert(0);
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break;
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}
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}
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}
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}
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}
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else if (m_info.hmmio && p_len > 0) {
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bytesWritten = _hwrite((HFILE) m_info.hmmio, (const char*) p_buf, p_len);
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if (bytesWritten == -1) {
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bytesWritten = 0;
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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m_info.lDiskOffset += bytesWritten;
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}
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}
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// DECOMP: This assert is just "pchNext <= pchEndWrite"
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// That would suggest that MXIOINFO directly extends MMIOINFO.
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// TODO: Change that if we still have entropy at the end.
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assert(m_info.pchNext <= m_info.pchEndWrite);
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return bytesWritten;
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}
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// FUNCTION: LEGO1 0x100cca00
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// FUNCTION: BETA10 0x1015e6c4
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MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
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{
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MxLong result = -1;
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MxLong bytesRead;
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// If buffered I/O
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if (m_info.pchBuffer) {
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@ -144,13 +213,12 @@ MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
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// don't seek at all and just return where we are.
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return m_info.lBufOffset + (m_info.pchNext - m_info.pchBuffer);
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}
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else {
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// With SEEK_CUR, p_offset is a relative offset.
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// Get the absolute position instead and use SEEK_SET.
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p_offset += m_info.lBufOffset + (m_info.pchNext - m_info.pchBuffer);
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p_origin = SEEK_SET;
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}
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}
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else if (p_origin == SEEK_END) {
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// not possible with buffered I/O
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return -1;
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@ -175,13 +243,12 @@ MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
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else {
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// align offset to buffer size
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MxLong newOffset = p_offset - (p_offset % m_info.cchBuffer);
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m_info.lBufOffset = newOffset;
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m_info.lBufOffset = p_offset - (p_offset % m_info.cchBuffer);
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// do we need to seek again?
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// (i.e. are we already aligned to buffer size?)
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if (p_offset != newOffset) {
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, newOffset, SEEK_SET);
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if (p_offset != m_info.lBufOffset) {
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, m_info.lBufOffset, SEEK_SET);
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if (m_info.lDiskOffset == -1) {
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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@ -190,15 +257,9 @@ MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
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if (m_info.lBufOffset == m_info.lDiskOffset) {
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// is the file open for writing only?
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if ((m_info.dwFlags & MMIO_RWMODE) && ((m_info.dwFlags & MMIO_RWMODE) != MMIO_READWRITE)) {
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m_info.pchNext = m_info.pchBuffer - m_info.lBufOffset + p_offset;
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result = p_offset;
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}
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else {
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if ((m_info.dwFlags & MMIO_RWMODE) == 0 || (m_info.dwFlags & MMIO_RWMODE) == MMIO_READWRITE) {
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// We can read from the file. Fill the buffer.
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MxLong bytesRead = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, m_info.cchBuffer);
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bytesRead = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, m_info.cchBuffer);
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if (bytesRead == -1) {
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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@ -213,19 +274,22 @@ MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
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}
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}
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}
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}
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}
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}
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}
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}
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else {
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m_info.pchNext = p_offset - m_info.lBufOffset + m_info.pchBuffer;
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result = p_offset;
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}
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}
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}
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}
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}
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}
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else if (m_info.hmmio) {
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// No buffer so just seek the file directly (if we have a valid handle)
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if (m_info.hmmio) {
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// i.e. if we just want to get the current file position
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if (p_origin == SEEK_CUR && p_offset == 0) {
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return m_info.lDiskOffset;
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}
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else {
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, p_offset, p_origin);
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result = m_info.lDiskOffset;
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@ -234,16 +298,16 @@ MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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}
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}
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}
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return result;
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}
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// FUNCTION: LEGO1 0x100ccbc0
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// FUNCTION: BETA10 0x1015e9ad
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MxU16 MXIOINFO::SetBuffer(char* p_buf, MxLong p_len, MxLong p_unused)
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{
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MxU16 result = Flush(0);
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MxU16 result = 0;
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result = Flush(0);
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if (m_info.dwFlags & MMIO_ALLOCBUF) {
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m_info.dwFlags &= ~MMIO_ALLOCBUF;
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@ -259,9 +323,11 @@ MxU16 MXIOINFO::SetBuffer(char* p_buf, MxLong p_len, MxLong p_unused)
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}
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// FUNCTION: LEGO1 0x100ccc10
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// FUNCTION: BETA10 0x1015ea3e
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MxU16 MXIOINFO::Flush(MxU16 p_unused)
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{
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MxU16 result = 0;
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MxLong bytesWritten;
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// if buffer is dirty
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if (m_info.dwFlags & MMIO_DIRTY) {
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@ -282,17 +348,17 @@ MxU16 MXIOINFO::Flush(MxU16 p_unused)
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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MxLong bytesWritten = _hwrite((HFILE) m_info.hmmio, m_info.pchBuffer, cchBuffer);
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bytesWritten = _hwrite((HFILE) m_info.hmmio, m_info.pchBuffer, cchBuffer);
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if (bytesWritten != -1 && bytesWritten == cchBuffer) {
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if (bytesWritten == -1 || bytesWritten != cchBuffer) {
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result = MMIOERR_CANNOTWRITE;
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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m_info.lDiskOffset += bytesWritten;
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m_info.pchNext = m_info.pchBuffer;
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m_info.dwFlags &= ~MMIO_DIRTY;
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}
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else {
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result = MMIOERR_CANNOTWRITE;
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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}
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}
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}
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@ -309,6 +375,7 @@ MxU16 MXIOINFO::Flush(MxU16 p_unused)
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}
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// FUNCTION: LEGO1 0x100ccd00
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// FUNCTION: BETA10 0x1015eb8f
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MxU16 MXIOINFO::Advance(MxU16 p_option)
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{
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MxU16 result = 0;
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@ -316,6 +383,7 @@ MxU16 MXIOINFO::Advance(MxU16 p_option)
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if (m_info.pchBuffer) {
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MxLong cch = m_info.cchBuffer;
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MxLong bytesCounter;
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// If we can and should write to the file,
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// if we are being asked to write to the file,
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@ -329,26 +397,24 @@ MxU16 MXIOINFO::Advance(MxU16 p_option)
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if (m_info.lBufOffset != m_info.lDiskOffset) {
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result = MMIOERR_CANNOTSEEK;
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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MxLong bytesWritten = _hwrite((HFILE) m_info.hmmio, m_info.pchBuffer, cch);
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bytesCounter = _hwrite((HFILE) m_info.hmmio, m_info.pchBuffer, cch);
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if (bytesWritten != -1 && bytesWritten == cch) {
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m_info.lDiskOffset += bytesWritten;
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if (bytesCounter == -1 || bytesCounter != cch) {
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result = MMIOERR_CANNOTWRITE;
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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m_info.lDiskOffset += bytesCounter;
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m_info.pchNext = m_info.pchBuffer;
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m_info.pchEndRead = m_info.pchBuffer;
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m_info.dwFlags &= ~MMIO_DIRTY;
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goto skipSeek;
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}
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else {
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result = MMIOERR_CANNOTWRITE;
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}
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}
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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skipSeek:
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m_info.lBufOffset += cch;
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if ((!rwmode || rwmode == MMIO_READWRITE) && cch > 0) {
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if (m_info.lBufOffset != m_info.lDiskOffset) {
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@ -361,16 +427,16 @@ MxU16 MXIOINFO::Advance(MxU16 p_option)
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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MxLong bytesRead = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, cch);
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bytesCounter = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, cch);
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if (bytesRead == -1) {
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if (bytesCounter == -1) {
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result = MMIOERR_CANNOTREAD;
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m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
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}
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else {
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m_info.lDiskOffset += bytesRead;
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m_info.lDiskOffset += bytesCounter;
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m_info.pchNext = m_info.pchBuffer;
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m_info.pchEndRead = m_info.pchBuffer + bytesRead;
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m_info.pchEndRead = m_info.pchBuffer + bytesCounter;
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}
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}
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}
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@ -383,9 +449,12 @@ MxU16 MXIOINFO::Advance(MxU16 p_option)
|
|||
}
|
||||
|
||||
// FUNCTION: LEGO1 0x100cce60
|
||||
// FUNCTION: BETA10 0x1015edef
|
||||
MxU16 MXIOINFO::Descend(MMCKINFO* p_chunkInfo, const MMCKINFO* p_parentInfo, MxU16 p_descend)
|
||||
{
|
||||
MxU16 result = 0;
|
||||
MxULong ofs;
|
||||
BOOL readOk;
|
||||
|
||||
if (!p_chunkInfo) {
|
||||
return MMIOERR_BASE; // ?
|
||||
|
|
@ -411,14 +480,14 @@ MxU16 MXIOINFO::Descend(MMCKINFO* p_chunkInfo, const MMCKINFO* p_parentInfo, MxU
|
|||
}
|
||||
}
|
||||
else {
|
||||
MxULong ofs = MAXLONG;
|
||||
ofs = MAXLONG;
|
||||
|
||||
if (p_parentInfo) {
|
||||
ofs = p_parentInfo->cksize + p_parentInfo->dwDataOffset;
|
||||
}
|
||||
|
||||
BOOL running = TRUE;
|
||||
BOOL readOk = FALSE;
|
||||
readOk = FALSE;
|
||||
MMCKINFO tmp;
|
||||
tmp.dwFlags = 0;
|
||||
|
||||
|
|
@ -461,9 +530,74 @@ MxU16 MXIOINFO::Descend(MMCKINFO* p_chunkInfo, const MMCKINFO* p_parentInfo, MxU
|
|||
}
|
||||
|
||||
if (!result) {
|
||||
memcpy(p_chunkInfo, &tmp, sizeof(MMCKINFO));
|
||||
// implicit memcpy
|
||||
*p_chunkInfo = tmp;
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
// FUNCTION: BETA10 0x1015f08b
|
||||
MxU16 MXIOINFO::Ascend(MMCKINFO* p_chunkInfo, MxU16 p_ascend)
|
||||
{
|
||||
MxLong ofs;
|
||||
MxULong size;
|
||||
MxU16 result = 0;
|
||||
|
||||
if (p_chunkInfo == NULL) {
|
||||
return MMIOERR_BASE;
|
||||
}
|
||||
|
||||
if (m_info.dwFlags & MMIO_RWMODE) {
|
||||
if (m_info.pchBuffer) {
|
||||
size = (MxULong) (m_info.pchNext - m_info.pchBuffer) + m_info.lBufOffset - p_chunkInfo->dwDataOffset;
|
||||
}
|
||||
else {
|
||||
size = m_info.lDiskOffset - p_chunkInfo->dwDataOffset;
|
||||
}
|
||||
|
||||
// Write a zero byte if the chunk size is odd
|
||||
if (size & 1) {
|
||||
Write(&result, 1);
|
||||
}
|
||||
|
||||
if ((p_chunkInfo->dwFlags & MMIO_DIRTY) && p_chunkInfo->cksize != size) {
|
||||
ofs = p_chunkInfo->dwDataOffset - 4;
|
||||
// Correct chunk size
|
||||
p_chunkInfo->cksize = size;
|
||||
p_chunkInfo->dwFlags &= ~MMIO_DIRTY;
|
||||
|
||||
// Now write the corrected size
|
||||
if (m_info.pchBuffer && ofs >= m_info.lBufOffset && m_info.cchBuffer + m_info.lBufOffset > ofs) {
|
||||
memcpy(m_info.pchBuffer + (ofs - m_info.lBufOffset), (char*) &size, 4);
|
||||
m_info.dwFlags |= MMIO_DIRTY;
|
||||
}
|
||||
else {
|
||||
m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, ofs, SEEK_SET);
|
||||
|
||||
if (m_info.lDiskOffset == ofs) {
|
||||
if (_lwrite((HFILE) m_info.hmmio, (char*) &size, 4) != 4) {
|
||||
m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
|
||||
result = MMIOERR_CANNOTWRITE;
|
||||
}
|
||||
else {
|
||||
m_info.lDiskOffset += 4; // TODO: compiler weirdness?
|
||||
}
|
||||
}
|
||||
else {
|
||||
m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
|
||||
result = MMIOERR_CANNOTSEEK;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Seek past the end of the chunk (plus optional pad byte if size is odd)
|
||||
if (result == 0 &&
|
||||
Seek((p_chunkInfo->cksize & 1) + p_chunkInfo->cksize + p_chunkInfo->dwDataOffset, SEEK_SET) == -1) {
|
||||
result = MMIOERR_CANNOTSEEK;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue