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* Use SDL IOStream in for MXIOINFO * Use SDL IOStream for WDB file * Use SDL IOStream for LegoStorage * Update README.md * Fixes * Add names to skip.yml * Add #include <stdio.h> where necessary
95 lines
3.3 KiB
C++
95 lines
3.3 KiB
C++
#ifndef MXIO_H
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#define MXIO_H
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#include "mxtypes.h"
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#include <SDL3/SDL_iostream.h>
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// [library:filesystem]
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// We define the bare minimum constants and structures to be compatible with the code in mxio.cpp
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// This is mostly copy-pasted from the MMSYSTEM.H Windows header.
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/* MMIO error return values */
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#define MMIOERR_BASE 256
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#define MMIOERR_OUTOFMEMORY (MMIOERR_BASE + 2) /* out of memory */
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#define MMIOERR_CANNOTOPEN (MMIOERR_BASE + 3) /* cannot open */
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#define MMIOERR_CANNOTREAD (MMIOERR_BASE + 5) /* cannot read */
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#define MMIOERR_CANNOTWRITE (MMIOERR_BASE + 6) /* cannot write */
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#define MMIOERR_CANNOTSEEK (MMIOERR_BASE + 7) /* cannot seek */
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#define MMIOERR_CHUNKNOTFOUND (MMIOERR_BASE + 9) /* chunk not found */
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#define MMIOERR_UNBUFFERED (MMIOERR_BASE + 10) /* */
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/* bit field masks */
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#define MMIO_RWMODE 0x00000003 /* open file for reading/writing/both */
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/* constants for dwFlags field of MMIOINFO */
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#define MMIO_ALLOCBUF 0x00010000 /* mmioOpen() should allocate a buffer */
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#define MMIO_DIRTY 0x10000000 /* I/O buffer is dirty */
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/* read/write mode numbers (bit field MMIO_RWMODE) */
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#define MMIO_READ 0x00000000 /* open file for reading only */
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#define MMIO_WRITE 0x00000001 /* open file for writing only */
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#define MMIO_READWRITE 0x00000002 /* open file for reading and writing */
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/* MMIO macros */
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#define mmioFOURCC(ch0, ch1, ch2, ch3) FOURCC(ch0, ch1, ch2, ch3)
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/* standard four character codes */
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#define FOURCC_RIFF mmioFOURCC('R', 'I', 'F', 'F')
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#define FOURCC_LIST mmioFOURCC('L', 'I', 'S', 'T')
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/* various MMIO flags */
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#define MMIO_FINDRIFF 0x0020 /* mmioDescend: find a LIST chunk */
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#define MMIO_FINDLIST 0x0040 /* mmioDescend: find a RIFF chunk */
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/* general MMIO information data structure */
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typedef struct _ISLE_MMIOINFO {
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/* general fields */
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MxU32 dwFlags; /* general status flags */
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/* fields maintained by MMIO functions during buffered I/O */
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Sint64 cchBuffer; /* size of I/O buffer (or 0L) */
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char* pchBuffer; /* start of I/O buffer (or NULL) */
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char* pchNext; /* pointer to next byte to read/write */
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char* pchEndRead; /* pointer to last valid byte to read */
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char* pchEndWrite; /* pointer to last byte to write */
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Sint64 lBufOffset; /* disk offset of start of buffer */
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/* fields maintained by I/O procedure */
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Sint64 lDiskOffset; /* disk offset of next read or write */
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} ISLE_MMIOINFO;
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/* RIFF chunk information data structure */
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typedef struct _ISLE_MMCKINFO {
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MxU32 ckid; /* chunk ID */
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MxU32 cksize; /* chunk size */
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MxU32 fccType; /* form type or list type */
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MxU32 dwDataOffset; /* offset of data portion of chunk */
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MxU32 dwFlags; /* flags used by MMIO functions */
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} ISLE_MMCKINFO;
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// SIZE 0x48
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class MXIOINFO {
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public:
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MXIOINFO();
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~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, SDL_IOWhence);
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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(ISLE_MMCKINFO*, const ISLE_MMCKINFO*, MxU16);
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MxU16 Ascend(ISLE_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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ISLE_MMIOINFO m_info;
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// [library:filesystem] This handle is always used instead of the `hmmio` member in m_info.
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SDL_IOStream* m_file;
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};
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#endif // MXIO_H
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