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MXIOINFO code style (#297)

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MS 2023-11-22 02:54:08 -05:00 committed by GitHub
parent abcc3afb31
commit 14f05ea823
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2 changed files with 25 additions and 36 deletions
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59
LEGO1/mxioinfo.cpp
View file

@ -28,7 +28,7 @@ MxU16 MXIOINFO::Open(const char* p_filename, MxULong p_flags)
m_info.lBufOffset = 0;
m_info.lDiskOffset = 0;
// Cast of p_flags to u16 forces the `movzx` instruction
// DECOMP: Cast of p_flags to u16 forces the `movzx` instruction
m_info.hmmio = (HMMIO) OpenFile(p_filename, &_unused, (MxU16) p_flags);
if ((HFILE) m_info.hmmio != HFILE_ERROR) {
@ -36,7 +36,7 @@ MxU16 MXIOINFO::Open(const char* p_filename, MxULong p_flags)
if (p_flags & MMIO_ALLOCBUF) {
// Default buffer length of 8k if none specified
int len = m_info.cchBuffer ? m_info.cchBuffer : 8192;
MxLong len = m_info.cchBuffer ? m_info.cchBuffer : 8192;
HPSTR buf = new char[len];
if (!buf) {
@ -91,7 +91,7 @@ MxLong MXIOINFO::Read(void* p_buf, MxLong p_len)
if (m_info.pchBuffer) {
int bytes_left = m_info.pchEndRead - m_info.pchNext;
MxLong bytes_left = m_info.pchEndRead - m_info.pchNext;
while (p_len > 0) {
if (bytes_left > 0) {
@ -129,7 +129,7 @@ MxLong MXIOINFO::Read(void* p_buf, MxLong p_len)
}
// OFFSET: LEGO1 0x100cca00
MxLong MXIOINFO::Seek(MxLong p_offset, int p_origin)
MxLong MXIOINFO::Seek(MxLong p_offset, MxLong p_origin)
{
MxLong result = -1;
@ -171,7 +171,7 @@ MxLong MXIOINFO::Seek(MxLong p_offset, int p_origin)
else {
// align offset to buffer size
int new_offset = p_offset - (p_offset % m_info.cchBuffer);
MxLong new_offset = p_offset - (p_offset % m_info.cchBuffer);
m_info.lBufOffset = new_offset;
// do we need to seek again?
@ -194,7 +194,7 @@ MxLong MXIOINFO::Seek(MxLong p_offset, int p_origin)
}
else {
// We can read from the file. Fill the buffer.
int bytes_read = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, m_info.cchBuffer);
MxLong bytes_read = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, m_info.cchBuffer);
if (bytes_read == -1) {
m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
@ -265,7 +265,7 @@ MxU16 MXIOINFO::Flush(MxU16 p_unused)
if (m_info.pchBuffer) {
// if we have a file open for writing
if (m_info.hmmio && (m_info.dwFlags & MMIO_RWMODE)) {
// (pulling this value out into a variable forces it into EBX)
// DECOMP: pulling this value out into a variable forces it into EBX
MxLong cchBuffer = m_info.cchBuffer;
if (cchBuffer > 0) {
if (m_info.lBufOffset != m_info.lDiskOffset) {
@ -355,7 +355,7 @@ MxU16 MXIOINFO::Advance(MxU16 p_option)
m_info.lDiskOffset = _llseek((HFILE) m_info.hmmio, 0, SEEK_CUR);
}
else {
int bytes_read = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, cch);
MxLong bytes_read = _hread((HFILE) m_info.hmmio, m_info.pchBuffer, cch);
if (bytes_read == -1) {
result = MMIOERR_CANNOTREAD;
@ -397,10 +397,9 @@ MxU16 MXIOINFO::Descend(MMCKINFO* p_chunkInfo, const MMCKINFO* p_parentInfo, MxU
p_chunkInfo->dwDataOffset = m_info.lDiskOffset;
}
if (p_chunkInfo->ckid == FOURCC_RIFF || p_chunkInfo->ckid == FOURCC_LIST) {
if (Read(&p_chunkInfo->fccType, 4) != 4) {
result = MMIOERR_CANNOTREAD;
}
if ((p_chunkInfo->ckid == FOURCC_RIFF || p_chunkInfo->ckid == FOURCC_LIST) &&
Read(&p_chunkInfo->fccType, 4) != 4) {
result = MMIOERR_CANNOTREAD;
}
}
}
@ -415,8 +414,7 @@ MxU16 MXIOINFO::Descend(MMCKINFO* p_chunkInfo, const MMCKINFO* p_parentInfo, MxU
MMCKINFO tmp;
tmp.dwFlags = 0;
// This loop is... something
do {
while (running) {
if (Read(&tmp, 8) != 8) {
// If the first read fails, report read error. Else EOF.
result = read_ok ? MMIOERR_CHUNKNOTFOUND : MMIOERR_CANNOTREAD;
@ -435,33 +433,24 @@ MxU16 MXIOINFO::Descend(MMCKINFO* p_chunkInfo, const MMCKINFO* p_parentInfo, MxU
result = MMIOERR_CHUNKNOTFOUND;
running = FALSE;
}
else {
if ((p_descend == MMIO_FINDLIST && tmp.ckid == FOURCC_LIST) ||
(p_descend == MMIO_FINDRIFF && tmp.ckid == FOURCC_RIFF)) {
if (Read(&tmp.fccType, 4) != 4) {
result = MMIOERR_CANNOTREAD;
}
else {
if (p_chunkInfo->fccType != tmp.fccType)
continue;
}
else if ((p_descend == MMIO_FINDLIST && tmp.ckid == FOURCC_LIST) || (p_descend == MMIO_FINDRIFF && tmp.ckid == FOURCC_RIFF)) {
if (Read(&tmp.fccType, 4) != 4) {
result = MMIOERR_CANNOTREAD;
running = FALSE;
}
else {
if (p_chunkInfo->ckid != tmp.ckid) {
if (Seek((tmp.cksize & 1) + tmp.cksize, SEEK_CUR) != -1) {
continue;
}
else {
result = MMIOERR_CANNOTSEEK;
}
}
else if (p_chunkInfo->fccType == tmp.fccType) {
running = FALSE;
}
}
else if (p_chunkInfo->ckid == tmp.ckid) {
running = FALSE;
}
else if (Seek((tmp.cksize & 1) + tmp.cksize, SEEK_CUR) == -1) {
result = MMIOERR_CANNOTSEEK;
running = FALSE;
}
}
} while (running);
}
if (!result)
memcpy(p_chunkInfo, &tmp, sizeof(MMCKINFO));

2
LEGO1/mxioinfo.h
View file

@ -17,7 +17,7 @@ class MXIOINFO {
MxU16 Open(const char*, MxULong);
MxU16 Close(MxLong);
MxLong Read(void*, MxLong);
MxLong Seek(MxLong, int);
MxLong Seek(MxLong, MxLong);
MxU16 SetBuffer(char*, MxLong, MxLong);
MxU16 Flush(MxU16);
MxU16 Advance(MxU16);