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tic.h

/****************************************************************************
 * Copyright (c) 1998-2001,2003 Free Software Foundation, Inc.              *
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 * copies of the Software, and to permit persons to whom the Software is    *
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 *                                                                          *
 * The above copyright notice and this permission notice shall be included  *
 * in all copies or substantial portions of the Software.                   *
 *                                                                          *
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
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/****************************************************************************
 *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
 *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
 ****************************************************************************/

/*
 * $Id: tic.h,v 1.46 2003/12/27 19:05:32 tom Exp $
 *    tic.h - Global variables and structures for the terminfo
 *                compiler.
 */

#ifndef __TIC_H
#define __TIC_H

#ifdef __cplusplus
extern "C" {
#endif

#include <curses.h>     /* for the _tracef() prototype, ERR/OK, bool defs */

/*
** The format of compiled terminfo files is as follows:
**
**          Header (12 bytes), containing information given below
**          Names Section, containing the names of the terminal
**          Boolean Section, containing the values of all of the
**                      boolean capabilities
**                      A null byte may be inserted here to make
**                      sure that the Number Section begins on an
**                      even word boundary.
**          Number Section, containing the values of all of the numeric
**                      capabilities, each as a short integer
**          String Section, containing short integer offsets into the
**                      String Table, one per string capability
**          String Table, containing the actual characters of the string
**                      capabilities.
**
**    NOTE that all short integers in the file are stored using VAX/PDP-style
**    byte-order, i.e., least-significant byte first.
**
**    There is no structure definition here because it would only confuse
**    matters.  Terminfo format is a raw byte layout, not a structure
**    dump.  If you happen to be on a little-endian machine with 16-bit
**    shorts that requires no padding between short members in a struct,
**    then there is a natural C structure that captures the header, but
**    not very helpfully.
*/

#define MAGIC           0432  /* first two bytes of a compiled entry */

/*
 * The "maximum" here is misleading; XSI guarantees minimum values, which a
 * given implementation may exceed.
 */
#define MAX_NAME_SIZE   512   /* maximum legal name field size (XSI:127) */
#define MAX_ENTRY_SIZE  4096  /* maximum legal entry size */

/*
 * The maximum size of individual name or alias is guaranteed in XSI to be at
 * least 14, since that corresponds to the older filename lengths.  Newer
 * systems allow longer aliases, though not many terminal descriptions are
 * written to use them.  The MAX_ALIAS symbol is used for warnings.
 */
#if HAVE_LONG_FILE_NAMES
#define MAX_ALIAS 32    /* smaller than POSIX minimum for PATH_MAX */
#else
#define MAX_ALIAS 14    /* SVr3 filename length */
#endif

/* location of user's personal info directory */
#define PRIVATE_INFO    "%s/.terminfo"    /* plug getenv("HOME") into %s */

/*
 * Some traces are designed to be used via tic's verbose option (and similar in
 * infocmp and toe) rather than the 'trace()' function.  So we use the bits
 * above the normal trace() parameter as a debug-level.
 */

#define MAX_DEBUG_LEVEL 15
#define DEBUG_LEVEL(n)  ((n) << TRACE_SHIFT)

#define set_trace_level(n) \
      _nc_tracing &= DEBUG_LEVEL(MAX_DEBUG_LEVEL), \
      _nc_tracing |= DEBUG_LEVEL(n)

#ifdef TRACE
#define DEBUG(n, a)     if (_nc_tracing >= DEBUG_LEVEL(n)) _tracef a
#else
#define DEBUG(n, a)     /*nothing*/
#endif

extern NCURSES_EXPORT_VAR(unsigned) _nc_tracing;
extern NCURSES_EXPORT(void) _nc_tracef (char *, ...) GCC_PRINTFLIKE(1,2);
extern NCURSES_EXPORT(const char *) _nc_visbuf (const char *);
extern NCURSES_EXPORT(const char *) _nc_visbuf2 (int, const char *);

/*
 * These are the types of tokens returned by the scanner.  The first
 * three are also used in the hash table of capability names.  The scanner
 * returns one of these values after loading the specifics into the global
 * structure curr_token.
 */

#define BOOLEAN 0       /* Boolean capability */
#define NUMBER 1        /* Numeric capability */
#define STRING 2        /* String-valued capability */
#define CANCEL 3        /* Capability to be cancelled in following tc's */
#define NAMES  4        /* The names for a terminal type */
#define UNDEF  5        /* Undefined */

#define NO_PUSHBACK     -1    /* used in pushtype to indicate no pushback */

      /*
       *    The global structure in which the specific parts of a
       *    scanned token are returned.
       *
       */

struct token
{
      char  *tk_name;         /* name of capability */
      int   tk_valnumber;     /* value of capability (if a number) */
      char  *tk_valstring;    /* value of capability (if a string) */
};

extern NCURSES_EXPORT_VAR(struct token)   _nc_curr_token;

      /*
       * List of keynames with their corresponding code.
       */
struct kn {
      const char *name;
      int code;
};

extern NCURSES_EXPORT_VAR(const struct kn) _nc_key_names[];

      /*
       * Offsets to string capabilities, with the corresponding functionkey
       * codes.
       */
struct tinfo_fkeys {
      unsigned offset;
      chtype code;
      };

#if   BROKEN_LINKER

#define     _nc_tinfo_fkeys   _nc_tinfo_fkeysf()
extern NCURSES_EXPORT(struct tinfo_fkeys *) _nc_tinfo_fkeysf (void);

#else

extern NCURSES_EXPORT_VAR(struct tinfo_fkeys) _nc_tinfo_fkeys[];

#endif

      /*
       * The file comp_captab.c contains an array of these structures, one
       * per possible capability.  These are indexed by a hash table array of
       * pointers to the same structures for use by the parser.
       */

struct name_table_entry
{
      const char *nte_name;   /* name to hash on */
      int   nte_type;   /* BOOLEAN, NUMBER or STRING */
      short nte_index;  /* index of associated variable in its array */
      short nte_link;   /* index in table of next hash, or -1 */
};

struct alias
{
      const char  *from;
      const char  *to;
      const char  *source;
};

extern NCURSES_EXPORT_VAR(const struct name_table_entry * const) _nc_info_hash_table[];
extern NCURSES_EXPORT_VAR(const struct name_table_entry * const) _nc_cap_hash_table[];

extern NCURSES_EXPORT_VAR(const struct alias) _nc_capalias_table[];
extern NCURSES_EXPORT_VAR(const struct alias) _nc_infoalias_table[];

extern NCURSES_EXPORT(const struct name_table_entry *) _nc_get_table (bool);
extern NCURSES_EXPORT(const struct name_table_entry * const *) _nc_get_hash_table (bool);

#define NOTFOUND  ((struct name_table_entry *) 0)

/* out-of-band values for representing absent capabilities */
#define ABSENT_BOOLEAN        (char)(-1)  /* 255 */
#define ABSENT_NUMERIC        (-1)
#define ABSENT_STRING         (char *)0

/* out-of-band values for representing cancels */
#define CANCELLED_BOOLEAN     (char)(-2)  /* 254 */
#define CANCELLED_NUMERIC     (-2)
#define CANCELLED_STRING      (char *)(-1)

#define VALID_BOOLEAN(s) ((unsigned char)(s) <= 1) /* reject "-1" */
#define VALID_NUMERIC(s) ((s) >= 0)
#define VALID_STRING(s) ((s) != CANCELLED_STRING && (s) != ABSENT_STRING)

/* termcap entries longer than this may break old binaries */
#define MAX_TERMCAP_LENGTH    1023

/* this is a documented limitation of terminfo */
#define MAX_TERMINFO_LENGTH   4096

#ifndef TERMINFO
#define TERMINFO "/usr/share/terminfo"
#endif

/* access.c */
extern NCURSES_EXPORT(unsigned) _nc_pathlast (const char *);
extern NCURSES_EXPORT(char *) _nc_basename (char *);
extern NCURSES_EXPORT(char *) _nc_rootname (char *);

/* comp_hash.c: name lookup */
extern NCURSES_EXPORT(struct name_table_entry const *) _nc_find_entry
      (const char *, const struct name_table_entry *const *);
extern NCURSES_EXPORT(struct name_table_entry const *) _nc_find_type_entry
      (const char *, int, const struct name_table_entry *);

/* comp_scan.c: lexical analysis */
extern NCURSES_EXPORT(int)  _nc_get_token (bool);
extern NCURSES_EXPORT(void) _nc_panic_mode (char);
extern NCURSES_EXPORT(void) _nc_push_token (int);
extern NCURSES_EXPORT(void) _nc_reset_input (FILE *, char *);
extern NCURSES_EXPORT_VAR(int) _nc_curr_col;
extern NCURSES_EXPORT_VAR(int) _nc_curr_line;
extern NCURSES_EXPORT_VAR(int) _nc_syntax;
extern NCURSES_EXPORT_VAR(long) _nc_comment_end;
extern NCURSES_EXPORT_VAR(long) _nc_comment_start;
extern NCURSES_EXPORT_VAR(long) _nc_curr_file_pos;
extern NCURSES_EXPORT_VAR(long) _nc_start_line;
#define SYN_TERMINFO    0
#define SYN_TERMCAP     1

/* comp_error.c: warning & abort messages */
extern NCURSES_EXPORT(void) _nc_set_source (const char *const name);
extern NCURSES_EXPORT(void) _nc_get_type (char *name);
extern NCURSES_EXPORT(void) _nc_set_type (const char *const name);
extern NCURSES_EXPORT(void) _nc_syserr_abort (const char *const,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
extern NCURSES_EXPORT(void) _nc_err_abort (const char *const,...) GCC_PRINTFLIKE(1,2) GCC_NORETURN;
extern NCURSES_EXPORT(void) _nc_warning (const char *const,...) GCC_PRINTFLIKE(1,2);
extern NCURSES_EXPORT_VAR(bool) _nc_suppress_warnings;

/* comp_expand.c: expand string into readable form */
extern NCURSES_EXPORT(char *) _nc_tic_expand (const char *, bool, int);

/* comp_scan.c: decode string from readable form */
extern NCURSES_EXPORT(char) _nc_trans_string (char *, char *);

/* captoinfo.c: capability conversion */
extern NCURSES_EXPORT(char *) _nc_captoinfo (const char *, const char *, int const);
extern NCURSES_EXPORT(char *) _nc_infotocap (const char *, const char *, int const);

/* lib_tparm.c */
#define NUM_PARM 9

extern NCURSES_EXPORT_VAR(int) _nc_tparm_err;

extern NCURSES_EXPORT(int) _nc_tparm_analyze(const char *string, char *p_is_s[NUM_PARM], int *popcount);

/* lib_tputs.c */
extern NCURSES_EXPORT_VAR(int) _nc_nulls_sent;        /* Add one for every null sent */

/* comp_main.c: compiler main */
extern const char * _nc_progname;

/* read_entry.c */
extern NCURSES_EXPORT(const char *) _nc_tic_dir (const char *);

/* write_entry.c */
extern NCURSES_EXPORT(int) _nc_tic_written (void);

#ifdef __cplusplus
}
#endif

#endif /* __TIC_H */

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