Unitech MR350MKII manual 3D Open file, Close file

if ((regs.x.cflag & 0x01) == 1) return(-1); else return(regs.x.ax);

}

3D Open file

The file must exist in the file table. This function returns the file handle.

Entry Parameters:	AH =	3D
	AL =	0	; Read only
		1	; Write only
		2	; Both Read and Write
	DS:DX = segment:offset of ASCIIZ file name
Returned Values:	if successful : Carry = clear, AX = handle
	if fail : Carry = set, AX = 2

When a file is opened, the file manager searches the file table for a file name match. If a match is found, the corresponding file handle is returned. The current pointer is reset to the beginning of the file, i.e. the current offset field is set to zero.

int TS_open_file(char *fn,int mode)

{

regs.h.al=(unsigned char)mode; segregs.ds = FP_SEG(fn); regs.x.dx = FP_OFF(fn); regs.h.ah=0x3D; int86x(0x21,®s,®s,&segregs);

if ((regs.x.cflag & 0x01) == 1) return(-1); else return(regs.x.ax);

	}
3E	Close file
	Entry Parameters:	AH = 3E
		BX = file handle
	Returned Values:	Carry = clear	; OK
		= set	; Failed

void TS_close_file(int hdl)

{

regs.h.ah= 0x3e; regs.x.bx= hdl; int86(0x21,®s,®s);

}

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