ncurses/term.priv.h

/****************************************************************************
 * Copyright 2021-2023,2024 Thomas E. Dickey                                *
 *                                                                          *
 * Permission is hereby granted, free of charge, to any person obtaining a  *
 * copy of this software and associated documentation files (the            *
 * "Software"), to deal in the Software without restriction, including      *
 * without limitation the rights to use, copy, modify, merge, publish,      *
 * distribute, distribute with modifications, sublicense, and/or sell       *
 * copies of the Software, and to permit persons to whom the Software is    *
 * furnished to do so, subject to the following conditions:                 *
 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
 *                                                                          *
 * Except as contained in this notice, the name(s) of the above copyright   *
 * holders shall not be used in advertising or otherwise to promote the     *
 * sale, use or other dealings in this Software without prior written       *
 * authorization.                                                           *
 ****************************************************************************/

/*
 * $Id: term.priv.h,v 1.13 2024/03/02 20:43:06 tom Exp $
 *
 *	term.priv.h
 *
 *	Header file for terminfo library objects which are private to
 *	the library.
 */

#ifndef _TERM_PRIV_H
#define _TERM_PRIV_H 1
/* *INDENT-OFF* */

#ifdef __cplusplus
extern "C" {
#endif

#include <ncurses_cfg.h>

#ifndef __NCURSES_H
#include <curses.h>
#endif

#undef NCURSES_OPAQUE
#define NCURSES_INTERNALS 1
#define NCURSES_OPAQUE 0

#if HAVE_LIMITS_H
# include <limits.h>		/* PATH_MAX, MB_LEN_MAX, etc */
#elif HAVE_SYS_PARAM_H
# include <sys/param.h>
#endif

#include <signal.h>		/* sig_atomic_t */
#include <time.h>		/* time_t */
#include <term.h>		/* time_t */

#ifdef USE_PTHREADS
#if USE_REENTRANT
#include <pthread.h>
#endif
#endif

/*
 * If not properly configured to use the system's limits.h, we get gcc's
 * fallback for limits.h which sets MB_LEN_MAX to 1, which is never correct.
 */
#if !HAVE_CONSISTENT_MB_LEN_MAX
#undef MB_LEN_MAX
#endif

#ifndef MB_LEN_MAX
#define MB_LEN_MAX 16	/* should be >= MB_CUR_MAX, but that may be a function */
#endif

#ifndef PATH_MAX
# if defined(_POSIX_PATH_MAX)
#  define PATH_MAX _POSIX_PATH_MAX
# elif defined(MAXPATHLEN)
#  define PATH_MAX MAXPATHLEN
# else
#  define PATH_MAX 255	/* the Posix minimum path-size */
# endif
#endif

/*
 * State of tparm().
 */
#define STACKSIZE 20

typedef struct {
	union {
		int	num;
		char *	str;
	} data;
	bool num_type;
} STACK_FRAME;

#define NUM_VARS 26

typedef struct {
	const char *	tparam_base;

	STACK_FRAME	stack[STACKSIZE];
	int		stack_ptr;

	char *		out_buff;
	size_t		out_size;
	size_t		out_used;

	char *		fmt_buff;
	size_t		fmt_size;

	int		static_vars[NUM_VARS];
#ifdef TRACE
	const char *	tname;
#endif
} TPARM_STATE;

typedef struct {
	char *		text;
	size_t		size;
} TRACEBUF;

typedef struct {
	const char *	name;
	char *		value;
} ITERATOR_VARS;

/*
 * Internals for term.h
 */
typedef struct term {			/* describe an actual terminal */
	TERMTYPE	type;		/* terminal type description */
	short		Filedes;	/* file description being written to */
	TTY		Ottyb;		/* original state of the terminal */
	TTY		Nttyb;		/* current state of the terminal */
	int		_baudrate;	/* used to compute padding */
	char *		_termname;	/* used for termname() */
	TPARM_STATE	tparm_state;
#if NCURSES_EXT_COLORS
	TERMTYPE2	type2;		/* extended terminal type description */
#endif
#undef TERMINAL
} TERMINAL;

/*
 * Internals for soft-keys
 */
typedef	struct {
	WINDOW *	win;		/* the window used in the hook      */
	int		line;		/* lines to take, < 0 => from bottom*/
	int		(*hook)(WINDOW *, int); /* callback for user	    */
} ripoff_t;

/*
 * Internals for tgetent
 */
typedef struct {
	long		sequence;
	bool		last_used;
	char *		fix_sgr0;	/* this holds the filtered sgr0 string */
	char *		last_bufp;	/* help with fix_sgr0 leak */
	TERMINAL *	last_term;
} TGETENT_CACHE;

#define TGETENT_MAX 4

#include <term_entry.h>		/* dbdLAST */

#ifdef USE_TERM_DRIVER
struct DriverTCB; /* Terminal Control Block forward declaration */
#endif

/*
 * Global data which is not specific to a screen.
 */
typedef struct {
	SIG_ATOMIC_T	have_sigtstp;
	SIG_ATOMIC_T	have_sigwinch;
	SIG_ATOMIC_T	cleanup_nested;

	bool		init_signals;
	bool		init_screen;

	char *		comp_sourcename;
	char *		comp_termtype;

	bool		have_tic_directory;
	bool		keep_tic_directory;
	const char *	tic_directory;

	char *		dbi_list;
	int		dbi_size;

	char *		first_name;
	char **		keyname_table;
	int		init_keyname;

	int		slk_format;

	int		getstr_limit;	/* getstr_limit based on POSIX LINE_MAX */

	char *		safeprint_buf;
	size_t		safeprint_used;

	TGETENT_CACHE	tgetent_cache[TGETENT_MAX];
	int		tgetent_index;
	long		tgetent_sequence;
	int		terminal_count;

	char *		dbd_blob;	/* string-heap for dbd_list[] */
	char **		dbd_list;	/* distinct places to look for data */
	int		dbd_size;	/* length of dbd_list[] */
	time_t		dbd_time;	/* cache last updated */
	ITERATOR_VARS	dbd_vars[dbdLAST];

#if HAVE_TSEARCH
	void *		cached_tparm;
	int		count_tparm;
#endif /* HAVE_TSEARCH */

#ifdef USE_TERM_DRIVER
	int		(*term_driver)(struct DriverTCB*, const char*, int*);
#endif

#define WINDOWLIST struct _win_list

#ifndef USE_SP_WINDOWLIST
	WINDOWLIST *	_nc_windowlist;
#define WindowList(sp)	_nc_globals._nc_windowlist
#endif

#if USE_HOME_TERMINFO
	char *		home_terminfo;
#endif

#if !USE_SAFE_SPRINTF
	int		safeprint_cols;
	int		safeprint_rows;
#endif

#ifdef USE_PTHREADS
	pthread_mutex_t	mutex_curses;
	pthread_mutex_t	mutex_prescreen;
	pthread_mutex_t	mutex_screen;
	pthread_mutex_t	mutex_update;
	pthread_mutex_t	mutex_tst_tracef;
	pthread_mutex_t	mutex_tracef;
	int		nested_tracef;
	int		use_pthreads;
#define _nc_use_pthreads	_nc_globals.use_pthreads
#if USE_PTHREADS_EINTR
	pthread_t	read_thread;	/* The reading thread */
#endif
#endif
#if USE_WIDEC_SUPPORT
	char		key_name[MB_LEN_MAX + 1];
#endif

#ifdef TRACE
	bool		trace_opened;
	int		trace_level;
	FILE *		trace_fp;
	int		trace_fd;

	char *		tracearg_buf;
	size_t		tracearg_used;

	TRACEBUF *	tracebuf_ptr;
	size_t		tracebuf_used;

	char		tracechr_buf[40];

	char *		tracedmp_buf;
	size_t		tracedmp_used;

	unsigned char *	tracetry_buf;
	size_t		tracetry_used;

	char		traceatr_color_buf[2][80];
	int		traceatr_color_sel;
	int		traceatr_color_last;
#if !defined(USE_PTHREADS) && USE_REENTRANT
	int		nested_tracef;
#endif
#endif	/* TRACE */

#if NO_LEAKS
	bool		leak_checking;
#endif
} NCURSES_GLOBALS;

extern NCURSES_EXPORT_VAR(NCURSES_GLOBALS) _nc_globals;

#define N_RIPS 5

#ifdef USE_PTHREADS
typedef struct _prescreen_list {
	struct _prescreen_list *next;
	pthread_t	id;
	struct screen *	sp;
} PRESCREEN_LIST;
#endif

/*
 * Global data which can be swept up into a SCREEN when one is created.
 * It may be modified before the next SCREEN is created.
 */
typedef struct {
#ifdef USE_PTHREADS
	PRESCREEN_LIST *allocated;
#else
	struct screen * allocated;
#endif
	bool		use_env;
	bool		filter_mode;
	attr_t		previous_attr;
	TPARM_STATE	tparm_state;
	TTY *		saved_tty;	/* savetty/resetty information	  */
	bool		use_tioctl;
	NCURSES_SP_OUTC	_outch;		/* output handler if not putc */
#ifndef USE_SP_RIPOFF
	ripoff_t	rippedoff[N_RIPS];
	ripoff_t *	rsp;
#endif
#if NCURSES_NO_PADDING
	bool		_no_padding;	/* flag to set if padding disabled */
#endif
#if BROKEN_LINKER || USE_REENTRANT
	chtype *	real_acs_map;
	int		_LINES;
	int		_COLS;
	int		_TABSIZE;
	int		_ESCDELAY;
	TERMINAL *	_cur_term;
#endif
#ifdef TRACE
#if BROKEN_LINKER || USE_REENTRANT
	long		_outchars;
	const char *	_tputs_trace;
#endif
#endif
} NCURSES_PRESCREEN;

extern NCURSES_EXPORT_VAR(NCURSES_PRESCREEN) _nc_prescreen;

extern NCURSES_EXPORT(void) _nc_free_tparm(TERMINAL*);

#ifdef __cplusplus
}
#endif

/* *INDENT-ON* */

#endif /* _TERM_PRIV_H */