Category : C Source Code
Archive   : FILE_IO.ZIP
Filename : FILE_IO.H

extern unsigned char DosMajVer, DosMinVer;

typedef unsigned char BYTE;
typedef unsigned char FLAG;

// O_COMMIT only works in DOS 4.0 & up. For commit on pre DOS 4 call
// FileCommit.

// O_CREATE will create a file ONLY if it doesn't exist. To force a
// create, use "O_CREATE | O_OPEN | O_TRUNC".

// If O_TEMP is set, the file name is the directory to create the file in.
// Will copy the final name into pFile - make sure its long enough (extra
// 12 bytes). If O_TEMP is set, O_OPEN & O_CREATE are ignored.

// At least one of O_READ and O_WRITE must be set.

// If you do NOT use S_DENY_READ and/or S_DENY_WRITE - the file will be
// opened in DENY_NONE, NOT compatibility mode. For pre DOS 4, to get the
// sharing set on a create, the file will be created, closed, and then
// opened.


#define O_OPEN 0x0001 // Open the file
#define O_CREATE 0x0002 // Create the file if doesn't exist
#define O_TEMP 0x0004 // Open a temporary file

#define O_READ 0x0010 // Can read from the file
#define O_WRITE 0x0020 // Can write to the file

#define O_APPEND 0x0100 // seek to end of file
#define O_TRUNC 0x0200 // set file to 0 length
#define O_COMMIT 0x0400 // set file to write-through

#define S_DENY_READ 0x1000 // lock out other reads
#define S_DENY_WRITE 0x2000 // lock out other writes
#define S_DENY_CHILD 0x4000 // don't pass handle to child

#define A_READ_ONLY 0x01 // Create file attributes
#define A_HIDDEN 0x02
#define A_SYSTEM 0x04
#define A_ARCHIVE 0x20


#ifdef DEBUG

void DebugPrintf (char const *, ...);

#endif

unsigned FileClose(int hFil);
unsigned FileCloseTemp(int hFil,BYTE const *pFile);
unsigned FileCommit(int hFil,int fOpenCommit);
unsigned FileDelete(BYTE const *pFile);
int FileDup(int hFil);
unsigned long FileGetSize(int hFil);
int FileOpen(BYTE *pFile,unsigned uMode,unsigned uAtr,
unsigned *puErr);
int FileOpenTemp(BYTE *pFile,unsigned long lNum);
unsigned FileRead(int hFil,void *pBuf,unsigned uNum);
unsigned FileSeek(int hFil,unsigned long ulOffset);
unsigned FileSeekRead(int hFil,unsigned long ulOffset,void *pBuf,unsigned uNum);
unsigned FileSeekWrite(int hFil,unsigned long ulOffset,void const *pBuf,unsigned uNum);
unsigned FileSetSize(int hFil,unsigned long ulSize);
unsigned FileTrueName(BYTE const *pFile,BYTE *pTrue);
unsigned FileWrite(int hFil,void const *pBuf,unsigned uNum);