/*
 *	I n t e r n a l   D e f i n i t i o n s    f o r   C P P
 *
 * In general, definitions in this file should not be changed.
 */

#ifndef	TRUE
#define	TRUE		1
#define	FALSE		0
#endif
#ifndef	EOS
/*
 * This is predefined in Decus C
 */
#define	EOS		'\0'		/* End of string		*/
#endif
#define	EOF_CHAR	0		/* Returned by get() on eof	*/
#define NULLST		((char *) NULL)	/* Pointer to nowhere (linted)	*/
#define	DEF_NOARGS	(-1)		/* #define foo vs #define foo()	*/

/*
 * The following may need to change if the host system doesn't use ASCII.
 */
#define ST_QUOTE	0x1C		/* Magic for stringizing	*/
#define	DEF_MAGIC	0x1D		/* Magic for #defines		*/
#define	TOK_SEP		0x1E		/* Token concatenation delim.	*/
#define COM_SEP		0x1F		/* Magic comment separator	*/
#define	MAC_PARM	0x7F		/* Macro formals signal		*/

/*
 * Character type codes.
 */

#define	INV		0		/* Invalid, must be zero	*/
#define	OP_EOE		INV		/* End of expression		*/
#define	DIG		1		/* Digit			*/
#define	LET		2		/* Identifier start		*/
#define	FIRST_BINOP	OP_ADD
#define	OP_ADD		3
#define	OP_SUB		4
#define	OP_MUL		5
#define	OP_DIV		6
#define	OP_MOD		7
#define	OP_ASL		8
#define	OP_ASR		9
#define	OP_AND		10		/* &, not &&			*/
#define	OP_OR		11		/* |, not ||			*/
#define	OP_XOR		12
#define	OP_EQ		13
#define	OP_NE		14
#define	OP_LT		15
#define	OP_LE		16
#define	OP_GE		17
#define	OP_GT		18
#define	OP_ANA		19		/* &&				*/
#define	OP_ORO		20		/* ||				*/
#define	OP_QUE		21		/* ?				*/
#define	OP_COL		22		/* :				*/
#define	OP_CMA		23		/* , (relevant?)		*/
#define	LAST_BINOP	OP_CMA		/* Last binary operand		*/
/*
 * The following are unary.
 */
#define	FIRST_UNOP	OP_PLU		/* First Unary operand		*/
#define	OP_PLU		24		/* + (draft ANSI standard)	*/
#define	OP_NEG		25		/* -				*/
#define	OP_COM		26		/* ~				*/
#define	OP_NOT		27		/* !				*/
#define	LAST_UNOP	OP_NOT
#define	OP_LPA		28		/* (				*/
#define	OP_RPA		29		/* )				*/
#define	OP_END		30		/* End of expression marker	*/
#define	OP_MAX		(OP_END + 1)	/* Number of operators		*/
#define	OP_FAIL		(OP_END + 1)	/* For error returns		*/

/*
 * The following are for lexical scanning only.
 */

#define	QUO		65		/* Both flavors of quotation	*/
#define	DOT		66		/* . might start a number	*/
#define	SPA		67		/* Space and tab		*/
#define	BSH		68		/* Just a backslash		*/
#define	END		69		/* EOF				*/

/*
 * These bits are set in ifstack[]
 */
#define	WAS_COMPILING	1		/* TRUE if compile set at entry	*/
#define	ELSE_SEEN	2		/* TRUE when #else processed	*/
#define	TRUE_SEEN	4		/* TRUE when #if TRUE processed	*/

/*
 * Define bits for the basic types and their adjectives
 */

#define	T_CHAR		  1
#define	T_INT		  2
#define	T_FLOAT		  4
#define	T_DOUBLE	  8
#define	T_SHORT		 16
#define	T_LONG		 32
#define	T_SIGNED	 64
#define	T_UNSIGNED	128
#define	T_PTR		256		/* Pointer			*/
#define	T_FPTR		512		/* Pointer to functions		*/

/*
 * The DEFBUF structure stores information about #defined
 * macros.  Note that the defbuf->repl information is always
 * in malloc storage.
 */

typedef struct defbuf {
	struct defbuf	*link;		/* Next define in chain	*/
	char		*repl;		/* -> replacement	*/
	int		hash;		/* Symbol table hash	*/
	int		nargs;		/* For define(args)	*/
	char		name[1];	/* #define name		*/
} DEFBUF;

/*
 * The FILEINFO structure stores information about open files
 * and macros being expanded.
 */

typedef struct fileinfo {
	char		*bptr;		/* Buffer pointer	*/
	int		line;		/* for include or macro	*/
	FILE		*fp;		/* File if non-null	*/
	struct fileinfo	*parent;	/* Link to includer	*/
	char		*filename;	/* File/macro name	*/
	char		*progname;	/* From #line statement	*/
	unsigned int	unrecur;	/* For macro recursion	*/
	char		buffer[1];	/* current input line	*/
} FILEINFO;

/*
 * The SIZES structure is used to store the values for #if sizeof
 */

typedef struct sizes {
    short	bits;			/* If this bit is set,		*/
    short	size;			/* this is the datum size value	*/
    short	psize;			/* this is the pointer size	*/
} SIZES;
/*
 * nomacarg is a built-in #define on Decus C.
 */

#ifdef	nomacarg
#define	cput		output		/* cput concatenates tokens	*/
#else
#if COMMENT_INVISIBLE || OK_CONCAT == CON_EXPAND
#define	cput(c)		{ if ((c) != TOK_SEP && (c) != COM_SEP) \
			    putchar((c == ST_QUOTE) ? '"' : (c)); }
#else
#define	cput(c)		{ if (c != TOK_SEP) \
			    putchar((c == ST_QUOTE) ? '"' : (c)); }
#endif
#endif

#ifndef	nomacarg
#define	streq(s1, s2)	(strcmp(s1, s2) == 0)
#endif

/*
 * Error codes.  VMS uses system definitions.
 * Decus C codes are defined in stdio.h.
 * Others are cooked to order.
 */

#if HOST == SYS_VMS
#include		<ssdef.h>
#include		<stsdef.h>
#define	IO_SUCCESS	(SS$_NORMAL | STS$M_INHIB_MSG)
#define	IO_ERROR	SS$_ABORT
#endif
/*
 * Note: IO_SUCCESS and IO_ERROR are defined in the Decus C stdio.h file
 */
#ifndef	IO_SUCCESS
#define	IO_SUCCESS	0
#endif
#ifndef	IO_ERROR
#define	IO_ERROR	1
#endif

/*
 * Externs
 */

extern int	line;			/* Current line number		*/
extern int	wrongline;		/* Force #line to cc pass 1	*/
extern char	type[];			/* Character classifier		*/
extern char	token[IDMAX + 1];	/* Current input token		*/
extern int	instring;		/* TRUE if scanning string	*/
extern int	inmacro;		/* TRUE if scanning #define	*/
extern int	errors;			/* Error counter		*/
extern int	recursion;		/* Macro depth counter		*/
extern char	ifstack[BLK_NEST];	/* #if information		*/
#define	compiling ifstack[0]
extern char	*ifptr;			/* -> current ifstack item	*/
extern char	*incdir[NINCLUDE];	/* -i directories		*/
extern char	**incend;		/* -> active end of incdir	*/
extern int	cflag;			/* -C option (keep comments)	*/
extern int	eflag;			/* -E option (ignore errors)	*/
extern int	nflag;			/* -N option (no pre-defines)	*/
extern int	pflag;			/* -P option (no #line output)	*/
extern int	tflag;			/* -T option (enable trigraphs)	*/
extern int	rec_recover;		/* unwind recursive macros	*/
extern char	*preset[];		/* Standard predefined symbols	*/
extern char	*magic[];		/* Magic predefined symbols	*/
extern FILEINFO	*infile;		/* Current input file		*/
extern char	work[NWORK + 1];	/* #define scratch		*/
extern char	*workp;			/* Free space in work		*/
#if	DEBUG
extern int	debug;			/* Debug level			*/
#endif
extern int	keepcomments;		/* Don't remove comments if set	*/
extern SIZES	size_table[];		/* For #if sizeof sizes		*/
extern char	*getmem();		/* Get memory or die.		*/
extern DEFBUF	*lookid();		/* Look for a #define'd thing	*/
extern DEFBUF	*defendel();		/* Symbol table enter/delete	*/
extern char	*savestring();		/* Stuff string in malloc mem.	*/
extern char	*strcpy();
extern char	*strcat();
extern char	*strrchr();
extern char	*strchr();
extern long	time();
extern char	*sprintf();		/* Lint needs this		*/