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file.h
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C/C++ Source or Header
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1994-08-06
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7KB
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240 lines
/* FILE.H
*
* High-level file I/O for MIDAS Sound System
*
* Copyright 1994 Petteri Kangaslampi and Jarno Paananen
*
* This file is part of the MIDAS Sound System, and may only be
* used, modified and distributed under the terms of the MIDAS
* Sound System license, LICENSE.TXT. By continuing to use,
* modify or distribute this file you indicate that you have
* read the license and understand and accept it fully.
*/
#ifndef __FILE_H
#define __FILE_H
#include "rawfile.h"
/****************************************************************************\
* struct fileFile
* ---------------
* Description: File state structure
\****************************************************************************/
typedef struct
{
rfHandle rf;
} fileFile;
/****************************************************************************\
* typedef fileHandle
* ------------------
* Description: High-level file I/O file handle
\****************************************************************************/
typedef fileFile* fileHandle;
/****************************************************************************\
* enum fileOpenMode
* -----------------
* Description: File opening mode. Used by fileOpen()
\****************************************************************************/
enum fileOpenMode
{
fileOpenRead = 1, /* open file for reading */
fileOpenWrite = 2, /* open file for writing */
fileOpenReadWrite = 3 /* open file for both reading and
writing */
};
/****************************************************************************\
* enum fileSeekMode
* -----------------
* Description: File seeking mode. Used by fileSeek()
\****************************************************************************/
enum fileSeekMode
{
fileSeekAbsolute = 1, /* seek to an absolute position from
the beginning of the file */
fileSeekRelative = 2, /* seek to a position relative to
current position */
fileSeekEnd = 3 /* seek relative to the end of file */
};
#ifdef __cplusplus
extern "C" {
#endif
/****************************************************************************\
*
* Function: int fileOpen(char *fileName, int openMode, fileHandle *file);
*
* Description: Opens a file for reading or writing
*
* Input: char *fileName name of file
* int openMode file opening mode, see enum rfOpenMode
* fileHandle *file pointer to file handle
*
* Returns: MIDAS error code.
* File handle is stored in *file.
*
\****************************************************************************/
int CALLING fileOpen(char *fileName, int openMode, fileHandle *file);
/****************************************************************************\
*
* Function: int fileClose(fileHandle file);
*
* Description: Closes a file opened with fileOpen().
*
* Input: fileHandle file handle of an open file
*
* Returns: MIDAS error code
*
\****************************************************************************/
int CALLING fileClose(fileHandle file);
/****************************************************************************\
*
* Function: int fileGetSize(fileHandle file, long *fileSize);
*
* Description: Get the size of a file
*
* Input: fileHandle file handle of an open file
* ulong *fileSize pointer to file size
*
* Returns: MIDAS error code.
* File size is stored in *fileSize.
*
\****************************************************************************/
int CALLING fileGetSize(fileHandle file, long *fileSize);
/****************************************************************************\
*
* Function: int fileRead(fileHandle file, void *buffer, ulong numBytes);
*
* Description: Reads binary data from a file
*
* Input: fileHandle file file handle
* void *buffer reading buffer
* ulong numBytes number of bytes to read
*
* Returns: MIDAS error code.
* Read data is stored in *buffer, which must be large enough
* for it.
*
\****************************************************************************/
int CALLING fileRead(fileHandle file, void *buffer, ulong numBytes);
/****************************************************************************\
*
* Function: int fileWrite(fileHandle file, void *buffer, ulong numBytes);
*
* Description: Writes binary data to a file
*
* Input: fileHandle file file handle
* void *buffer pointer to data to be written
* ulong numBytes number of bytes to write
*
* Returns: MIDAS error code
*
\****************************************************************************/
int CALLING fileWrite(fileHandle file, void *buffer, ulong numBytes);
/****************************************************************************\
*
* Function: int fileSeek(fileHandle file, long newPosition, int seekMode);
*
* Description: Seeks to a new position in file. Subsequent reads and writes
* go to the new position.
*
* Input: fileHandle file file handle
* long newPosition new file position
* int seekMode file seek mode, see enum rfSeekMode
*
* Returns: MIDAS error code
*
\****************************************************************************/
int CALLING fileSeek(fileHandle file, long newPosition, int seekMode);
/****************************************************************************\
*
* Function: int fileGetPosition(fileHandle file, long *position);
*
* Description: Reads the current position in a file
*
* Input: fileHandle file file handle
* long *position pointer to file position
*
* Returns: MIDAS error code.
* Current file position is stored in *position.
*
\****************************************************************************/
int CALLING fileGetPosition(fileHandle file, long *position);
#ifdef __cplusplus
}
#endif
/****************************************************************************\
* enum fileFunctIDs
* -----------------
* Description: ID numbers for high-level file I/O functions
\****************************************************************************/
enum fileFunctIDs
{
ID_fileOpen = ID_file,
ID_fileClose,
ID_fileGetSize,
ID_fileRead,
ID_fileWrite,
ID_fileSeek,
ID_fileGetPosition
};
#endif