/* Copyright (C) 1990, 1993, 1994 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU Ghostscript is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility to
  anyone for the consequences of using it or for whether it serves any
  particular purpose or works at all, unless he says so in writing.  Refer
  to the GNU Ghostscript General Public License for full details.
  
*/

/* ibnum.h */
/* Interface to Level 2 number readers */
/* Requires stream.h */

/* Define the byte that begins an encoded number array. */
/* (This is the same as the value of bt_num_array in btoken.h.) */
#define bt_num_array_value 149

/* Homogenous number array formats. */
/* The default for numbers is big-endian. */
#define num_int32 0			/* [0..31] */
#define num_int16 32			/* [32..47] */
#define num_float 48
#define num_float_IEEE num_float
#define num_float_native (num_float + 1)
#define num_msb 0
#define num_lsb 128
#define num_is_lsb(format) ((format) >= num_lsb)
#define num_is_valid(format) (((format) & 127) <= 49)
/* Special "format" for reading from an array. */
/* num_msb/lsb is not used in this case. */
#define num_array 256
/* Define the number of bytes for a given format of encoded number. */
extern const byte enc_num_bytes[]; /* in ibnum.c */
#define enc_num_bytes_values\
  4, 4, 2, 4, 0, 0, 0, 0,\
  4, 4, 2, 4, 0, 0, 0, 0,\
  sizeof(ref)
#define encoded_number_bytes(format)\
  (enc_num_bytes[(format) >> 4])

/* Read from an array or encoded number array. */
int	sread_num_array(P2(stream *, ref *));
uint	scount_num_stream(P2(stream *, int));
int	sget_encoded_number(P3(stream *, int, ref *));

/* Decode a number with appropriate byte swapping. */
int	sdecode_number(P3(const byte *, int, ref *));
short	sdecodeshort(P2(const byte *, int));
long	sdecodelong(P2(const byte *, int));
float	sdecodefloat(P2(const byte *, int));
