; stdio.h
; Definitions for stream input/output.

_NFILE	equ 20

; Bufferisation type to be used as 3rd argument for "setvbuf" function
_IOFBF equ 0
_IOLBF equ 1
_IONBF equ 2

; "flags" bits definitions
_F_RDWR equ 00003h   ; Read/write flag
_F_READ equ 00001h   ; Read only file
_F_WRIT equ 00002h   ; Write only file
_F_BUF  equ 00004h   ; Malloc'ed Buffer data
_F_LBUF equ 00008h   ; line-buffered file
_F_ERR  equ 00010h   ; Error indicator
_F_EOF  equ 00020h   ; EOF indicator
_F_BIN  equ 00040h   ; Binary file indicator
_F_IN   equ 00080h   ; Data is incoming
_F_OUT  equ 00100h   ; Data is outgoing
_F_TERM equ 00200h   ; File is a terminal

; End-of-file constant definition
EOF equ (-1)         ; End of file indicator

; Default buffer size use by "setbuf" function
STDIO_BUFSIZ equ 512 ; Buffer size for stdio

; Size of an arry large enough to hold a temporary file name string
L_ctermid   equ 5    ; CON: plus null byte
P_tmpdir    equ ""   ; temporary directory
L_tmpnam    equ 13   ; tmpnam buffer size

; Constants to be used as 3rd argument for "fseek" function
SEEK_CUR equ 1
SEEK_END equ 2
SEEK_SET equ 0

; Number of unique file names that shall be generated by "tmpnam" function
TMP_MAX     equ 0FFFFh

; Definition of the control structure for streams
FILE	struc
level		dw ?	; fill/empty level of buffer
flags		dw ?	; File status flags
fd		db ?	; File descriptor
hold		db ?	; Ungetc char if no buffer
_bsize		dw ?	; Buffer size. Yes, calling it just "bsize" crashes TASM.
if LDATA
	buffer	dd ?	; Data transfer buffer
	curp	dd ?	; Current active pointer
else
	buffer	dw ?	; Data transfer buffer
	curp	dw ?	; Current active pointer
endif
istemp		dw ?	; Temporary file indicator
token		dw ?	 ; Used for validity checking
FILE	ends

FOPEN_MAX equ _NFILE
SYS_OPEN equ _NFILE
FILENAME_MAX equ 80