# 4.4BSD/usr/src/contrib/sc/sc.h

```/*	SC	A Table Calculator
*		Common definitions
*
*		original by James Gosling, September 1982
*		modified by Mark Weiser and Bruce Israel,
*			University of Maryland
*		R. Bond  12/86
*		More mods by Alan Silverstein, 3-4/88, see list of changes.
*		\$Revision: 6.8 \$
*
*/

#define	ATBL(tbl, row, col)	(*(tbl + row) + (col))

#define MINROWS 40	/* minimum size at startup */
#define MINCOLS 20
#define	ABSMAXCOLS 702	/* absolute cols: ZZ (base 26) */
#define RESCOL 4	/* columns reserved for row numbers */
#define RESROW 3 /* rows reserved for prompt, error, and column numbers */
#define DEFWIDTH 10	/* Default column width and precision */
#define DEFPREC   2
#define HISTLEN  10	/* Number of history entries for vi emulation */
#define error (void)move(1,0), (void)clrtoeol(), (void) printw
#define	FBUFLEN	1024	/* buffer size for a single field */
#define	PATHLEN	1024	/* maximum path length */

#ifndef A_CHARTEXT	/* Should be defined in curses.h */
#ifdef INTERNATIONAL
#define A_CHARTEXT 0xff
#else
#define A_CHARTEXT 0x7f
#endif
#endif

#if (defined(BSD42) || defined(BSD43)) && !defined(strrchr)
#define strrchr rindex
#endif

struct ent_ptr {
int vf;
struct ent *vp;
};

struct range_s {
struct ent_ptr left, right;
};

/*
* Some not too obvious things about the flags:
*    is_valid means there is a valid number in v.
*    label set means it points to a valid constant string.
*    is_strexpr set means expr yields a string expression.
*    If is_strexpr is not set, and expr points to an expression tree, the
*        expression yields a numeric expression.
*    So, either v or label can be set to a constant.
*        Either (but not both at the same time) can be set from an expression.
*/

#define VALID_CELL(p, r, c) ((p = *ATBL(tbl, r, c)) && \
((p->flags & is_valid) || p->label))

struct ent {
double v;
char *label;
struct enode *expr;
short flags;
short row, col;
struct ent *next;		/* next deleted ent */
struct ent *evnext;		/* next ent w/ a object to eval */
struct ent *evprev;		/* prev ent w/ a object to eval */
};

struct range {
struct ent_ptr r_left, r_right;
char *r_name;
struct range *r_next, *r_prev;
int r_is_range;
};

#define FIX_ROW 1
#define FIX_COL 2

struct enode {
int op;
union {
double k;
struct ent_ptr v;
struct range_s r;
char *s;
struct {
struct enode *left, *right;
} o;
} e;
};

/* op values */
#define O_VAR 'v'
#define O_CONST 'k'
#define O_SCONST '\$'
#define REDUCE 0200	/* Or'ed into OP if operand is a range */

#define OP_BASE 256
#define ACOS OP_BASE + 0
#define ASIN OP_BASE + 1
#define ATAN OP_BASE + 2
#define CEIL OP_BASE + 3
#define COS OP_BASE + 4
#define EXP OP_BASE + 5
#define FABS OP_BASE + 6
#define FLOOR OP_BASE + 7
#define HYPOT OP_BASE + 8
#define LOG OP_BASE + 9
#define LOG10 OP_BASE + 10
#define POW OP_BASE + 11
#define SIN OP_BASE + 12
#define SQRT OP_BASE + 13
#define TAN OP_BASE + 14
#define DTR OP_BASE + 15
#define RTD OP_BASE + 16
#define MIN OP_BASE + 17
#define MAX OP_BASE + 18
#define RND OP_BASE + 19
#define HOUR OP_BASE + 20
#define MINUTE OP_BASE + 21
#define SECOND OP_BASE + 22
#define MONTH OP_BASE + 23
#define DAY OP_BASE + 24
#define YEAR OP_BASE + 25
#define NOW OP_BASE + 26
#define DATE OP_BASE + 27
#define FMT OP_BASE + 28
#define SUBSTR OP_BASE + 29
#define STON OP_BASE + 30
#define EQS OP_BASE + 31
#define EXT OP_BASE + 32
#define ELIST OP_BASE + 33	/* List of expressions */
#define LMAX  OP_BASE + 34
#define LMIN  OP_BASE + 35
#define NVAL OP_BASE + 36
#define SVAL OP_BASE + 37
#define PV OP_BASE + 38
#define FV OP_BASE + 39
#define PMT OP_BASE + 40
#define STINDEX OP_BASE + 41
#define LOOKUP OP_BASE + 42
#define ATAN2 OP_BASE + 43
#define INDEX OP_BASE + 44
#define DTS OP_BASE + 45
#define TTS OP_BASE + 46
#define ABS OP_BASE + 47
#define HLOOKUP OP_BASE + 48
#define VLOOKUP OP_BASE + 49
#define ROUND OP_BASE + 50
#define IF OP_BASE + 51

/* flag values */
#define is_valid     0001
#define is_changed   0002
#define is_strexpr   0004
#define is_leftflush 0010
#define is_deleted   0020

#define ctl(c) ((c)&037)
#define ESC 033
#define DEL 0177

#define BYCOLS 1
#define BYROWS 2
#define BYGRAPH 4		/* Future */

#define	TBL	1		/* tblprint style output for 'tbl' */
#define	LATEX	2		/* tblprint style output for 'LaTeX' */
#define	TEX	3		/* tblprint style output for 'TeX' */

/* Types for etype() */

#define NUM	1
#define STR	2

#define	GROWAMT	10	/* default minimum amount to grow */

#define	GROWNEW		1	/* first time table */
#define	GROWROW		2	/* add rows */
#define	GROWCOL		3
#define	GROWBOTH	4
extern	struct ent ***tbl;

extern	char curfile[];
extern	int strow, stcol;
extern	int currow, curcol;
extern	int savedrow, savedcol;
extern	int FullUpdate;
extern	int maxrow, maxcol;
extern	int maxrows, maxcols;	/* # cells currently allocated */
extern	int *fwidth;
extern	int *precision;
extern	char *col_hidden;
extern	char *row_hidden;
extern	char line[FBUFLEN];
extern	int linelim;
extern	int changed;
extern	struct ent *to_fix;
extern	int showsc, showsr;

extern	FILE *openout();
extern	char *coltoa();
extern	char *findhome();
extern	char *r_name();
extern	char *seval();
extern	char *strrchr();
extern	char *v_name();
extern	char *xmalloc();
extern	double dolookup();
extern	double eval();
extern	int RealEvalAll();
extern	int are_ranges();
extern	int atocol();
extern	int constant();
extern	int etype();
extern	int fork();
extern	int get_rcqual();
extern	int growtbl();
extern	int nmgetch();
extern	int writefile();
extern	int xfree();
extern	int yn_ask();
extern	struct enode *copye();
extern	struct enode *new();
extern	struct enode *new_const();
extern	struct enode *new_range();
extern	struct enode *new_str();
extern	struct enode *new_var();
extern	struct ent *lookat();
extern	struct range *find_range();
extern	void EvalAll();
extern	void Evalall();
extern	void RealEvalOne();
extern	void backcol();
extern	void backrow();
extern	void checkbounds();
extern	void clearent();
extern	void closecol();
extern	void closeout();
extern	void closerow();
extern	void colshow_op();
extern	void colvalueize();
extern	void colvalueize();
extern	void copy();
extern	void copyent();
extern	void copyrtv();
extern	void decompile();
extern	void deletecol();
extern	void deleterow();
extern	void deraw();
extern	void doend();
extern	void doformat();
extern	void dupcol();
extern	void duprow();
extern	void editexp();
extern	void edits();
extern	void editv();
extern	void efree();
extern	void erase_area();
extern	void erasedb();
extern	void eraser();
extern	void fill();
extern	void flush_saved();
extern	void forwcol();
extern	void forwrow();
extern	void free_ent();
extern	void go_last();
extern	void goraw();
extern	void help();
extern	void hide_col();
extern	void hide_row();
extern	void hidecol();
extern	void hiderow();
extern	void index_arg();
extern	void ins_string();
extern	void insert_mode();
extern	void insertcol();
extern	void insertrow();
extern	void kbd_again();
extern	void label();
extern	void let();
extern	void list_arg();
extern	void list_range();
extern	void moveto();
extern	void num_search();
extern	void one_arg();
extern	void opencol();
extern	void openrow();
extern	void printfile();
extern	void pullcells();
extern	void range_arg();
extern	void readfile();
extern	void repaint();
extern	void resetkbd();
extern	void rowshow_op();
extern	void rowvalueize();
extern	void setauto();
extern	void setiterations();
extern	void setorder();
extern	void showcol();
extern	void showdr();
extern	void showrow();
extern	void showstring();
extern	void signals();
extern	void slet();
extern	void startshow();
extern	void str_search();
extern	void sync_refs();
extern	void syncref();
extern	void tblprintfile();
extern	void three_arg();
extern	void two_arg();
extern	void two_arg_index();
extern	void update();
extern	void valueize_area();
extern	void write_fd();
extern	void write_line();
extern	void yyerror();
#ifdef DOBACKUPS
extern	int backup_file();
#endif

extern	int modflg;
extern	int Crypt;
extern	char *mdir;
extern	double prescale;
extern	int extfunc;
extern	int propagation;
extern	int calc_order;
extern	int autocalc;
extern	int numeric;
extern	int showcell;
extern	int showtop;
extern	int loading;
extern	int getrcqual;
extern	int tbl_style;
extern	char *progname;

#if BSD42 || SYSIII

#ifndef cbreak
#define	cbreak		crmode
#define	nocbreak	nocrmode
#endif

#endif
```