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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
*/

/*
* This file contains various definitions of structures that are used by Vim
*/

/*
* There is something wrong in the SAS compiler that makes typedefs not
* valid in include files. Has been fixed in version 6.58.
*/
#if defined(SASC) && SASC < 658
typedef long linenr_T;
typedef int colnr_T;
typedef unsigned short short_u;
#endif

/*
* position in file or buffer
*/
typedef struct
{
    linenr_T lnum; /* line number */
    colnr_T col; /* column number */
#ifdef FEAT_VIRTUALEDIT
    colnr_T coladd;
#endif
} pos_T;

#ifdef FEAT_VIRTUALEDIT
# define INIT_POS_T(l, c, ca) {l, c, ca}
#else
# define INIT_POS_T(l, c, ca) {l, c}
#endif

/*
* Same, but without coladd.
*/
typedef struct
{
    linenr_T lnum; /* line number */
    colnr_T col; /* column number */
} lpos_T;

/*
* Structure used for growing arrays.
* This is used to store information that only grows, is deleted all at
* once, and needs to be accessed by index. See ga_clear() and ga_grow().
*/
typedef struct growarray
{
    int ga_len; /* current number of items used */
    int ga_maxlen; /* maximum number of items possible */
    int ga_itemsize; /* sizeof(item) */
    int ga_growsize; /* number of items to grow each time */
    void *ga_data; /* pointer to the first item */
} garray_T;

#define GA_EMPTY {0, 0, 0, 0, NULL}

/*
* This is here because regexp.h needs pos_T and below regprog_T is used.
*/
#include "regexp.h"

typedef struct window_S win_T;
typedef struct wininfo_S wininfo_T;
typedef struct frame_S frame_T;
typedef int scid_T; /* script ID */

/*
* This is here because gui.h needs the pos_T and win_T, and win_T needs gui.h
* for scrollbar_T.
*/
#ifdef FEAT_GUI
# include "gui.h"
#else
# ifdef FEAT_XCLIPBOARD
# include <X11/Intrinsic.h>
# endif
# define guicolor_T int /* avoid error in prototypes */
#endif

/*
* marks: positions in a file
* (a normal mark is a lnum/col pair, the same as a file position)
*/

/* (Note: for EBCDIC there are more than 26, because there are gaps in the
* alphabet coding. To minimize changes to the code, I decided to just
* increase the number of possible marks. */
#define NMARKS ('z' - 'a' + 1) /* max. # of named marks */
#define JUMPLISTSIZE 100 /* max. # of marks in jump list */
#define TAGSTACKSIZE 20 /* max. # of tags in tag stack */

typedef struct filemark
{
    pos_T mark; /* cursor position */
    int fnum; /* file number */
} fmark_T;

/* Xtended file mark: also has a file name */
typedef struct xfilemark
{
    fmark_T fmark;
    char_u *fname; /* file name, used when fnum == 0 */
} xfmark_T;

/*
* The taggy struct is used to store the information about a :tag command.
*/
typedef struct taggy
{
    char_u *tagname; /* tag name */
    fmark_T fmark; /* cursor position BEFORE ":tag" */
    int cur_match; /* match number */
    int cur_fnum; /* buffer number used for cur_match */
} taggy_T;

/*
* Structure that contains all options that are local to a window.
* Used twice in a window: for the current buffer and for all buffers.
* Also used in wininfo_T.
*/
typedef struct
{
#ifdef FEAT_ARABIC
    int wo_arab;
# define w_p_arab w_onebuf_opt.wo_arab /* 'arabic' */
#endif
#ifdef FEAT_DIFF
    int wo_diff;
# define w_p_diff w_onebuf_opt.wo_diff /* 'diff' */
#endif
#ifdef FEAT_FOLDING
    long wo_fdc;
# define w_p_fdc w_onebuf_opt.wo_fdc /* 'foldcolumn' */
    int wo_fen;
# define w_p_fen w_onebuf_opt.wo_fen /* 'foldenable' */
    char_u *wo_fdi;
# define w_p_fdi w_onebuf_opt.wo_fdi /* 'foldignore' */
    long wo_fdl;
# define w_p_fdl w_onebuf_opt.wo_fdl /* 'foldlevel' */
    char_u *wo_fdm;
# define w_p_fdm w_onebuf_opt.wo_fdm /* 'foldmethod' */
    long wo_fml;
# define w_p_fml w_onebuf_opt.wo_fml /* 'foldminlines' */
    long wo_fdn;
# define w_p_fdn w_onebuf_opt.wo_fdn /* 'foldnestmax' */
# ifdef FEAT_EVAL
    char_u *wo_fde;
# define w_p_fde w_onebuf_opt.wo_fde /* 'foldexpr' */
    char_u *wo_fdt;
# define w_p_fdt w_onebuf_opt.wo_fdt /* 'foldtext' */
# endif
    char_u *wo_fmr;
# define w_p_fmr w_onebuf_opt.wo_fmr /* 'foldmarker' */
#endif
#ifdef FEAT_LINEBREAK
    int wo_lbr;
# define w_p_lbr w_onebuf_opt.wo_lbr /* 'linebreak' */
#endif
    int wo_list;
#define w_p_list w_onebuf_opt.wo_list /* 'list' */
    int wo_nu;
#define w_p_nu w_onebuf_opt.wo_nu /* 'number' */
    int wo_rnu;
#define w_p_rnu w_onebuf_opt.wo_rnu /* 'relativenumber' */
#ifdef FEAT_LINEBREAK
    long wo_nuw;
# define w_p_nuw w_onebuf_opt.wo_nuw /* 'numberwidth' */
#endif
#if defined(FEAT_WINDOWS)
    int wo_wfh;
# define w_p_wfh w_onebuf_opt.wo_wfh /* 'winfixheight' */
    int wo_wfw;
# define w_p_wfw w_onebuf_opt.wo_wfw /* 'winfixwidth' */
#endif
#if defined(FEAT_WINDOWS) && defined(FEAT_QUICKFIX)
    int wo_pvw;
# define w_p_pvw w_onebuf_opt.wo_pvw /* 'previewwindow' */
#endif
#ifdef FEAT_RIGHTLEFT
    int wo_rl;
# define w_p_rl w_onebuf_opt.wo_rl /* 'rightleft' */
    char_u *wo_rlc;
# define w_p_rlc w_onebuf_opt.wo_rlc /* 'rightleftcmd' */
#endif
    long wo_scr;
#define w_p_scr w_onebuf_opt.wo_scr /* 'scroll' */
#ifdef FEAT_SPELL
    int wo_spell;
# define w_p_spell w_onebuf_opt.wo_spell /* 'spell' */
#endif
#ifdef FEAT_SYN_HL
    int wo_cuc;
# define w_p_cuc w_onebuf_opt.wo_cuc /* 'cursorcolumn' */
    int wo_cul;
# define w_p_cul w_onebuf_opt.wo_cul /* 'cursorline' */
    char_u *wo_cc;
# define w_p_cc w_onebuf_opt.wo_cc /* 'colorcolumn' */
#endif
#ifdef FEAT_STL_OPT
    char_u *wo_stl;
#define w_p_stl w_onebuf_opt.wo_stl /* 'statusline' */
#endif
#ifdef FEAT_SCROLLBIND
    int wo_scb;
# define w_p_scb w_onebuf_opt.wo_scb /* 'scrollbind' */
#endif
    int wo_wrap;
#define w_p_wrap w_onebuf_opt.wo_wrap /* 'wrap' */
#ifdef FEAT_CONCEAL
    char_u *wo_cocu; /* 'concealcursor' */
# define w_p_cocu w_onebuf_opt.wo_cocu
    long wo_cole; /* 'conceallevel' */
# define w_p_cole w_onebuf_opt.wo_cole
#endif
#ifdef FEAT_CURSORBIND
    int wo_crb;
# define w_p_crb w_onebuf_opt.wo_crb /* 'cursorbind' */
#endif

#ifdef FEAT_EVAL
    int wo_scriptID[WV_COUNT]; /* SIDs for window-local options */
# define w_p_scriptID w_onebuf_opt.wo_scriptID
#endif
} winopt_T;

/*
* Window info stored with a buffer.
*
* Two types of info are kept for a buffer which are associated with a
* specific window:
* 1. Each window can have a different line number associated with a buffer.
* 2. The window-local options for a buffer work in a similar way.
* The window-info is kept in a list at b_wininfo. It is kept in
* most-recently-used order.
*/
struct wininfo_S
{
    wininfo_T *wi_next; /* next entry or NULL for last entry */
    wininfo_T *wi_prev; /* previous entry or NULL for first entry */
    win_T *wi_win; /* pointer to window that did set wi_fpos */
    pos_T wi_fpos; /* last cursor position in the file */
    int wi_optset; /* TRUE when wi_opt has useful values */
    winopt_T wi_opt; /* local window options */
#ifdef FEAT_FOLDING
    int wi_fold_manual; /* copy of w_fold_manual */
    garray_T wi_folds; /* clone of w_folds */
#endif
};

/*
* Info used to pass info about a fold from the fold-detection code to the
* code that displays the foldcolumn.
*/
typedef struct foldinfo
{
    int fi_level; /* level of the fold; when this is zero the
other fields are invalid */
    int fi_lnum; /* line number where fold starts */
    int fi_low_level; /* lowest fold level that starts in the same
line */
} foldinfo_T;

/* Structure to store info about the Visual area. */
typedef struct
{
    pos_T vi_start; /* start pos of last VIsual */
    pos_T vi_end; /* end position of last VIsual */
    int vi_mode; /* VIsual_mode of last VIsual */
    colnr_T vi_curswant; /* MAXCOL from w_curswant */
} visualinfo_T;

/*
* structures used for undo
*/

typedef struct u_entry u_entry_T;
typedef struct u_header u_header_T;
struct u_entry
{
    u_entry_T *ue_next; /* pointer to next entry in list */
    linenr_T ue_top; /* number of line above undo block */
    linenr_T ue_bot; /* number of line below undo block */
    linenr_T ue_lcount; /* linecount when u_save called */
    char_u **ue_array; /* array of lines in undo block */
    long ue_size; /* number of lines in ue_array */
#ifdef U_DEBUG
    int ue_magic; /* magic number to check allocation */
#endif
};

struct u_header
{
    /* The following have a pointer and a number. The number is used when
* reading the undo file in u_read_undo() */
    union {
u_header_T *ptr; /* pointer to next undo header in list */
long seq;
    } uh_next;
    union {
u_header_T *ptr; /* pointer to previous header in list */
long seq;
    } uh_prev;
    union {
u_header_T *ptr; /* pointer to next header for alt. redo */
long seq;
    } uh_alt_next;
    union {
u_header_T *ptr; /* pointer to previous header for alt. redo */
long seq;
    } uh_alt_prev;
    long uh_seq; /* sequence number, higher == newer undo */
    int uh_walk; /* used by undo_time() */
    u_entry_T *uh_entry; /* pointer to first entry */
    u_entry_T *uh_getbot_entry; /* pointer to where ue_bot must be set */
    pos_T uh_cursor; /* cursor position before saving */
#ifdef FEAT_VIRTUALEDIT
    long uh_cursor_vcol;
#endif
    int uh_flags; /* see below */
    pos_T uh_namedm[NMARKS]; /* marks before undo/after redo */
#ifdef FEAT_VISUAL
    visualinfo_T uh_visual; /* Visual areas before undo/after redo */
#endif
    time_t uh_time; /* timestamp when the change was made */
    long uh_save_nr; /* set when the file was saved after the
changes in this block */
#ifdef U_DEBUG
    int uh_magic; /* magic number to check allocation */
#endif
};

/* values for uh_flags */
#define UH_CHANGED 0x01 /* b_changed flag before undo/after redo */
#define UH_EMPTYBUF 0x02 /* buffer was empty */

/*
* structures used in undo.c
*/
#if SIZEOF_INT > 2
# define ALIGN_LONG /* longword alignment and use filler byte */
# define ALIGN_SIZE (sizeof(long))
#else
# define ALIGN_SIZE (sizeof(short))
#endif

#define ALIGN_MASK (ALIGN_SIZE - 1)

typedef struct m_info minfo_T;

/*
* structure used to link chunks in one of the free chunk lists.
*/
struct m_info
{
#ifdef ALIGN_LONG
    long_u m_size; /* size of the chunk (including m_info) */
#else
    short_u m_size; /* size of the chunk (including m_info) */
#endif
    minfo_T *m_next; /* pointer to next free chunk in the list */
};

/*
* things used in memfile.c
*/

typedef struct block_hdr bhdr_T;
typedef struct memfile memfile_T;
typedef long blocknr_T;

/*
* mf_hashtab_T is a chained hashtable with blocknr_T key and arbitrary
* structures as items. This is an intrusive data structure: we require
* that items begin with mf_hashitem_T which contains the key and linked
* list pointers. List of items in each bucket is doubly-linked.
*/

typedef struct mf_hashitem_S mf_hashitem_T;

struct mf_hashitem_S
{
    mf_hashitem_T *mhi_next;
    mf_hashitem_T *mhi_prev;
    blocknr_T mhi_key;
};

#define MHT_INIT_SIZE 64

typedef struct mf_hashtab_S
{
    long_u mht_mask; /* mask used for hash value (nr of items
* in array is "mht_mask" + 1) */
    long_u mht_count; /* nr of items inserted into hashtable */
    mf_hashitem_T **mht_buckets; /* points to mht_small_buckets or
*dynamically allocated array */
    mf_hashitem_T *mht_small_buckets[MHT_INIT_SIZE]; /* initial buckets */
    char mht_fixed; /* non-zero value forbids growth */
} mf_hashtab_T;

/*
* for each (previously) used block in the memfile there is one block header.
*
* The block may be linked in the used list OR in the free list.
* The used blocks are also kept in hash lists.
*
* The used list is a doubly linked list, most recently used block first.
* The blocks in the used list have a block of memory allocated.
* mf_used_count is the number of pages in the used list.
* The hash lists are used to quickly find a block in the used list.
* The free list is a single linked list, not sorted.
* The blocks in the free list have no block of memory allocated and
* the contents of the block in the file (if any) is irrelevant.
*/

struct block_hdr
{
    mf_hashitem_T bh_hashitem; /* header for hash table and key */
#define bh_bnum bh_hashitem.mhi_key /* block number, part of bh_hashitem */

    bhdr_T *bh_next; /* next block_hdr in free or used list */
    bhdr_T *bh_prev; /* previous block_hdr in used list */
    char_u *bh_data; /* pointer to memory (for used block) */
    int bh_page_count; /* number of pages in this block */

#define BH_DIRTY 1
#define BH_LOCKED 2
    char bh_flags; /* BH_DIRTY or BH_LOCKED */
};

/*
* when a block with a negative number is flushed to the file, it gets
* a positive number. Because the reference to the block is still the negative
* number, we remember the translation to the new positive number in the
* double linked trans lists. The structure is the same as the hash lists.
*/
typedef struct nr_trans NR_TRANS;

struct nr_trans
{
    mf_hashitem_T nt_hashitem; /* header for hash table and key */
#define nt_old_bnum nt_hashitem.mhi_key /* old, negative, number */

    blocknr_T nt_new_bnum; /* new, positive, number */
};

/*
* structure used to store one block of the stuff/redo/recording buffers
*/
struct buffblock
{
    struct buffblock *b_next; /* pointer to next buffblock */
    char_u b_str[1]; /* contents (actually longer) */
};

/*
* header used for the stuff buffer and the redo buffer
*/
struct buffheader
{
    struct buffblock bh_first; /* first (dummy) block of list */
    struct buffblock *bh_curr; /* buffblock for appending */
    int bh_index; /* index for reading */
    int bh_space; /* space in bh_curr for appending */
};

/*
* used for completion on the command line
*/
typedef struct expand
{
    int xp_context; /* type of expansion */
    char_u *xp_pattern; /* start of item to expand */
    int xp_pattern_len; /* bytes in xp_pattern before cursor */
#if defined(FEAT_USR_CMDS) && defined(FEAT_EVAL) && defined(FEAT_CMDL_COMPL)
    char_u *xp_arg; /* completion function */
    int xp_scriptID; /* SID for completion function */
#endif
    int xp_backslash; /* one of the XP_BS_ values */
#ifndef BACKSLASH_IN_FILENAME
    int xp_shell; /* TRUE for a shell command, more
characters need to be escaped */
#endif
    int xp_numfiles; /* number of files found by
file name completion */
    char_u **xp_files; /* list of files */
} expand_T;

/* values for xp_backslash */
#define XP_BS_NONE 0 /* nothing special for backslashes */
#define XP_BS_ONE 1 /* uses one backslash before a space */
#define XP_BS_THREE 2 /* uses three backslashes before a space */

/*
* Command modifiers ":vertical", ":browse", ":confirm" and ":hide" set a flag.
* This needs to be saved for recursive commands, put them in a structure for
* easy manipulation.
*/
typedef struct
{
    int hide; /* TRUE when ":hide" was used */
# ifdef FEAT_BROWSE_CMD
    int browse; /* TRUE to invoke file dialog */
# endif
# ifdef FEAT_WINDOWS
    int split; /* flags for win_split() */
    int tab; /* > 0 when ":tab" was used */
# endif
# if defined(FEAT_GUI_DIALOG) || defined(FEAT_CON_DIALOG)
    int confirm; /* TRUE to invoke yes/no dialog */
# endif
    int keepalt; /* TRUE when ":keepalt" was used */
    int keepmarks; /* TRUE when ":keepmarks" was used */
    int keepjumps; /* TRUE when ":keepjumps" was used */
    int lockmarks; /* TRUE when ":lockmarks" was used */
# ifdef FEAT_AUTOCMD
    char_u *save_ei; /* saved value of 'eventignore' */
# endif
} cmdmod_T;

typedef struct file_buffer buf_T; /* forward declaration */

#define MF_SEED_LEN 8

struct memfile
{
    char_u *mf_fname; /* name of the file */
    char_u *mf_ffname; /* idem, full path */
    int mf_fd; /* file descriptor */
    bhdr_T *mf_free_first; /* first block_hdr in free list */
    bhdr_T *mf_used_first; /* mru block_hdr in used list */
    bhdr_T *mf_used_last; /* lru block_hdr in used list */
    unsigned mf_used_count; /* number of pages in used list */
    unsigned mf_used_count_max; /* maximum number of pages in memory */
    mf_hashtab_T mf_hash; /* hash lists */
    mf_hashtab_T mf_trans; /* trans lists */
    blocknr_T mf_blocknr_max; /* highest positive block number + 1*/
    blocknr_T mf_blocknr_min; /* lowest negative block number - 1 */
    blocknr_T mf_neg_count; /* number of negative blocks numbers */
    blocknr_T mf_infile_count; /* number of pages in the file */
    unsigned mf_page_size; /* number of bytes in a page */
    int mf_dirty; /* TRUE if there are dirty blocks */
#ifdef FEAT_CRYPT
    buf_T *mf_buffer; /* bufer this memfile is for */
    char_u mf_seed[MF_SEED_LEN]; /* seed for encryption */

    /* Values for key, method and seed used for reading data blocks when
* updating for a newly set key or method. Only when mf_old_key != NULL. */
    char_u *mf_old_key;
    int mf_old_cm;
    char_u mf_old_seed[MF_SEED_LEN];
#endif
};

/*
* things used in memline.c
*/
/*
* When searching for a specific line, we remember what blocks in the tree
* are the branches leading to that block. This is stored in ml_stack. Each
* entry is a pointer to info in a block (may be data block or pointer block)
*/
typedef struct info_pointer
{
    blocknr_T ip_bnum; /* block number */
    linenr_T ip_low; /* lowest lnum in this block */
    linenr_T ip_high; /* highest lnum in this block */
    int ip_index; /* index for block with current lnum */
} infoptr_T; /* block/index pair */

#ifdef FEAT_BYTEOFF
typedef struct ml_chunksize
{
    int mlcs_numlines;
    long mlcs_totalsize;
} chunksize_T;

 /* Flags when calling ml_updatechunk() */

#define ML_CHNK_ADDLINE 1
#define ML_CHNK_DELLINE 2
#define ML_CHNK_UPDLINE 3
#endif

/*
* the memline structure holds all the information about a memline
*/
typedef struct memline
{
    linenr_T ml_line_count; /* number of lines in the buffer */

    memfile_T *ml_mfp; /* pointer to associated memfile */

#define ML_EMPTY 1 /* empty buffer */
#define ML_LINE_DIRTY 2 /* cached line was changed and allocated */
#define ML_LOCKED_DIRTY 4 /* ml_locked was changed */
#define ML_LOCKED_POS 8 /* ml_locked needs positive block number */
    int ml_flags;

    infoptr_T *ml_stack; /* stack of pointer blocks (array of IPTRs) */
    int ml_stack_top; /* current top if ml_stack */
    int ml_stack_size; /* total number of entries in ml_stack */

    linenr_T ml_line_lnum; /* line number of cached line, 0 if not valid */
    char_u *ml_line_ptr; /* pointer to cached line */

    bhdr_T *ml_locked; /* block used by last ml_get */
    linenr_T ml_locked_low; /* first line in ml_locked */
    linenr_T ml_locked_high; /* last line in ml_locked */
    int ml_locked_lineadd; /* number of lines inserted in ml_locked */
#ifdef FEAT_BYTEOFF
    chunksize_T *ml_chunksize;
    int ml_numchunks;
    int ml_usedchunks;
#endif
} memline_T;

#if defined(FEAT_SIGNS) || defined(PROTO)
typedef struct signlist signlist_T;

struct signlist
{
    int id; /* unique identifier for each placed sign */
    linenr_T lnum; /* line number which has this sign */
    int typenr; /* typenr of sign */
    signlist_T *next; /* next signlist entry */
# ifdef FEAT_NETBEANS_INTG
    signlist_T *prev; /* previous entry -- for easy reordering */
# endif
};

/* type argument for buf_getsigntype() */
#define SIGN_ANY 0
#define SIGN_LINEHL 1
#define SIGN_ICON 2
#define SIGN_TEXT 3
#endif

/*
* Argument list: Array of file names.
* Used for the global argument list and the argument lists local to a window.
*/
typedef struct arglist
{
    garray_T al_ga; /* growarray with the array of file names */
    int al_refcount; /* number of windows using this arglist */
} alist_T;

/*
* For each argument remember the file name as it was given, and the buffer
* number that contains the expanded file name (required for when ":cd" is
* used.
*/
typedef struct argentry
{
    char_u *ae_fname; /* file name as specified */
    int ae_fnum; /* buffer number with expanded file name */
} aentry_T;

#ifdef FEAT_WINDOWS
# define ALIST(win) (win)->w_alist
#else
# define ALIST(win) (&global_alist)
#endif
#define GARGLIST ((aentry_T *)global_alist.al_ga.ga_data)
#define ARGLIST ((aentry_T *)ALIST(curwin)->al_ga.ga_data)
#define WARGLIST(wp) ((aentry_T *)ALIST(wp)->al_ga.ga_data)
#define AARGLIST(al) ((aentry_T *)((al)->al_ga.ga_data))
#define GARGCOUNT (global_alist.al_ga.ga_len)
#define ARGCOUNT (ALIST(curwin)->al_ga.ga_len)
#define WARGCOUNT(wp) (ALIST(wp)->al_ga.ga_len)

/*
* A list used for saving values of "emsg_silent". Used by ex_try() to save the
* value of "emsg_silent" if it was non-zero. When this is done, the CSF_SILENT
* flag below is set.
*/

typedef struct eslist_elem eslist_T;
struct eslist_elem
{
    int saved_emsg_silent; /* saved value of "emsg_silent" */
    eslist_T *next; /* next element on the list */
};

/*
* For conditional commands a stack is kept of nested conditionals.
* When cs_idx < 0, there is no conditional command.
*/
#define CSTACK_LEN 50

struct condstack
{
    short cs_flags[CSTACK_LEN]; /* CSF_ flags */
    char cs_pending[CSTACK_LEN]; /* CSTP_: what's pending in ":finally"*/
    union {
void *csp_rv[CSTACK_LEN]; /* return typeval for pending return */
void *csp_ex[CSTACK_LEN]; /* exception for pending throw */
    } cs_pend;
    void *cs_forinfo[CSTACK_LEN]; /* info used by ":for" */
    int cs_line[CSTACK_LEN]; /* line nr of ":while"/":for" line */
    int cs_idx; /* current entry, or -1 if none */
    int cs_looplevel; /* nr of nested ":while"s and ":for"s */
    int cs_trylevel; /* nr of nested ":try"s */
    eslist_T *cs_emsg_silent_list; /* saved values of "emsg_silent" */
    char cs_lflags; /* loop flags: CSL_ flags */
};
# define cs_rettv cs_pend.csp_rv
# define cs_exception cs_pend.csp_ex

/* There is no CSF_IF, the lack of CSF_WHILE, CSF_FOR and CSF_TRY means ":if"
* was used. */
# define CSF_TRUE 0x0001 /* condition was TRUE */
# define CSF_ACTIVE 0x0002 /* current state is active */
# define CSF_ELSE 0x0004 /* ":else" has been passed */
# define CSF_WHILE 0x0008 /* is a ":while" */
# define CSF_FOR 0x0010 /* is a ":for" */

# define CSF_TRY 0x0100 /* is a ":try" */
# define CSF_FINALLY 0x0200 /* ":finally" has been passed */
# define CSF_THROWN 0x0400 /* exception thrown to this try conditional */
# define CSF_CAUGHT 0x0800 /* exception caught by this try conditional */
# define CSF_SILENT 0x1000 /* "emsg_silent" reset by ":try" */
/* Note that CSF_ELSE is only used when CSF_TRY and CSF_WHILE are unset
* (an ":if"), and CSF_SILENT is only used when CSF_TRY is set. */

/*
* What's pending for being reactivated at the ":endtry" of this try
* conditional:
*/
# define CSTP_NONE 0 /* nothing pending in ":finally" clause */
# define CSTP_ERROR 1 /* an error is pending */
# define CSTP_INTERRUPT 2 /* an interrupt is pending */
# define CSTP_THROW 4 /* a throw is pending */
# define CSTP_BREAK 8 /* ":break" is pending */
# define CSTP_CONTINUE 16 /* ":continue" is pending */
# define CSTP_RETURN 24 /* ":return" is pending */
# define CSTP_FINISH 32 /* ":finish" is pending */

/*
* Flags for the cs_lflags item in struct condstack.
*/
# define CSL_HAD_LOOP 1 /* just found ":while" or ":for" */
# define CSL_HAD_ENDLOOP 2 /* just found ":endwhile" or ":endfor" */
# define CSL_HAD_CONT 4 /* just found ":continue" */
# define CSL_HAD_FINA 8 /* just found ":finally" */

/*
* A list of error messages that can be converted to an exception. "throw_msg"
* is only set in the first element of the list. Usually, it points to the
* original message stored in that element, but sometimes it points to a later
* message in the list. See cause_errthrow() below.
*/
struct msglist
{
    char_u *msg; /* original message */
    char_u *throw_msg; /* msg to throw: usually original one */
    struct msglist *next; /* next of several messages in a row */
};

/*
* Structure describing an exception.
* (don't use "struct exception", it's used by the math library).
*/
typedef struct vim_exception except_T;
struct vim_exception
{
    int type; /* exception type */
    char_u *value; /* exception value */
    struct msglist *messages; /* message(s) causing error exception */
    char_u *throw_name; /* name of the throw point */
    linenr_T throw_lnum; /* line number of the throw point */
    except_T *caught; /* next exception on the caught stack */
};

/*
* The exception types.
*/
#define ET_USER 0 /* exception caused by ":throw" command */
#define ET_ERROR 1 /* error exception */
#define ET_INTERRUPT 2 /* interrupt exception triggered by Ctrl-C */

/*
* Structure to save the error/interrupt/exception state between calls to
* enter_cleanup() and leave_cleanup(). Must be allocated as an automatic
* variable by the (common) caller of these functions.
*/
typedef struct cleanup_stuff cleanup_T;
struct cleanup_stuff
{
    int pending; /* error/interrupt/exception state */
    except_T *exception; /* exception value */
};

#ifdef FEAT_SYN_HL
/* struct passed to in_id_list() */
struct sp_syn
{
    int inc_tag; /* ":syn include" unique tag */
    short id; /* highlight group ID of item */
    short *cont_in_list; /* cont.in group IDs, if non-zero */
};

/*
* Each keyword has one keyentry, which is linked in a hash list.
*/
typedef struct keyentry keyentry_T;

struct keyentry
{
    keyentry_T *ke_next; /* next entry with identical "keyword[]" */
    struct sp_syn k_syn; /* struct passed to in_id_list() */
    short *next_list; /* ID list for next match (if non-zero) */
    int flags;
    int k_char; /* conceal substitute character */
    char_u keyword[1]; /* actually longer */
};

/*
* Struct used to store one state of the state stack.
*/
typedef struct buf_state
{
    int bs_idx; /* index of pattern */
    int bs_flags; /* flags for pattern */
#ifdef FEAT_CONCEAL
    int bs_seqnr; /* stores si_seqnr */
    int bs_cchar; /* stores si_cchar */
#endif
    reg_extmatch_T *bs_extmatch; /* external matches from start pattern */
} bufstate_T;

/*
* syn_state contains the syntax state stack for the start of one line.
* Used by b_sst_array[].
*/
typedef struct syn_state synstate_T;

struct syn_state
{
    synstate_T *sst_next; /* next entry in used or free list */
    linenr_T sst_lnum; /* line number for this state */
    union
    {
bufstate_T sst_stack[SST_FIX_STATES]; /* short state stack */
garray_T sst_ga; /* growarray for long state stack */
    } sst_union;
    int sst_next_flags; /* flags for sst_next_list */
    int sst_stacksize; /* number of states on the stack */
    short *sst_next_list; /* "nextgroup" list in this state
* (this is a copy, don't free it! */
    disptick_T sst_tick; /* tick when last displayed */
    linenr_T sst_change_lnum;/* when non-zero, change in this line
* may have made the state invalid */
};
#endif /* FEAT_SYN_HL */

/*
* Structure shared between syntax.c, screen.c and gui_x11.c.
*/
typedef struct attr_entry
{
    short ae_attr; /* HL_BOLD, etc. */
    union
    {
struct
{
char_u *start; /* start escape sequence */
char_u *stop; /* stop escape sequence */
} term;
struct
{
/* These colors need to be > 8 bits to hold 256. */
short_u fg_color; /* foreground color number */
short_u bg_color; /* background color number */
} cterm;
# ifdef FEAT_GUI
struct
{
guicolor_T fg_color; /* foreground color handle */
guicolor_T bg_color; /* background color handle */
guicolor_T sp_color; /* special color handle */
GuiFont font; /* font handle */
# ifdef FEAT_XFONTSET
GuiFontset fontset; /* fontset handle */
# endif
} gui;
# endif
    } ae_u;
} attrentry_T;

#ifdef USE_ICONV
# ifdef HAVE_ICONV_H
# include <iconv.h>
# else
# if defined(MACOS_X)
# include <sys/errno.h>
# define EILSEQ ENOENT /* MacOS X does not have EILSEQ */
typedef struct _iconv_t *iconv_t;
# else
# if defined(MACOS_CLASSIC)
typedef struct _iconv_t *iconv_t;
# define EINVAL 22
# define E2BIG 7
# define ENOENT 2
# define EFAULT 14
# define EILSEQ 123
# else
# include <errno.h>
# endif
# endif
typedef void *iconv_t;
# endif
#endif

/*
* Used for the typeahead buffer: typebuf.
*/
typedef struct
{
    char_u *tb_buf; /* buffer for typed characters */
    char_u *tb_noremap; /* mapping flags for characters in tb_buf[] */
    int tb_buflen; /* size of tb_buf[] */
    int tb_off; /* current position in tb_buf[] */
    int tb_len; /* number of valid bytes in tb_buf[] */
    int tb_maplen; /* nr of mapped bytes in tb_buf[] */
    int tb_silent; /* nr of silently mapped bytes in tb_buf[] */
    int tb_no_abbr_cnt; /* nr of bytes without abbrev. in tb_buf[] */
    int tb_change_cnt; /* nr of time tb_buf was changed; never zero */
} typebuf_T;

/* Struct to hold the saved typeahead for save_typeahead(). */
typedef struct
{
    typebuf_T save_typebuf;
    int typebuf_valid; /* TRUE when save_typebuf valid */
    int old_char;
    int old_mod_mask;
    struct buffheader save_stuffbuff;
#ifdef USE_INPUT_BUF
    char_u *save_inputbuf;
#endif
} tasave_T;

/*
* Used for conversion of terminal I/O and script files.
*/
typedef struct
{
    int vc_type; /* zero or one of the CONV_ values */
    int vc_factor; /* max. expansion factor */
# ifdef WIN3264
    int vc_cpfrom; /* codepage to convert from (CONV_CODEPAGE) */
    int vc_cpto; /* codepage to convert to (CONV_CODEPAGE) */
# endif
# ifdef USE_ICONV
    iconv_t vc_fd; /* for CONV_ICONV */
# endif
    int vc_fail; /* fail for invalid char, don't use '?' */
} vimconv_T;

/*
* Structure used for reading from the viminfo file.
*/
typedef struct
{
    char_u *vir_line; /* text of the current line */
    FILE *vir_fd; /* file descriptor */
#ifdef FEAT_MBYTE
    vimconv_T vir_conv; /* encoding conversion */
#endif
} vir_T;

#define CONV_NONE 0
#define CONV_TO_UTF8 1
#define CONV_9_TO_UTF8 2
#define CONV_TO_LATIN1 3
#define CONV_TO_LATIN9 4
#define CONV_ICONV 5
#ifdef WIN3264
# define CONV_CODEPAGE 10 /* codepage -> codepage */
#endif
#ifdef MACOS_X
# define CONV_MAC_LATIN1 20
# define CONV_LATIN1_MAC 21
# define CONV_MAC_UTF8 22
# define CONV_UTF8_MAC 23
#endif

/*
* Structure used for mappings and abbreviations.
*/
typedef struct mapblock mapblock_T;
struct mapblock
{
    mapblock_T *m_next; /* next mapblock in list */
    char_u *m_keys; /* mapped from, lhs */
    int m_keylen; /* strlen(m_keys) */
    char_u *m_str; /* mapped to, rhs */
    char_u *m_orig_str; /* rhs as entered by the user */
    int m_mode; /* valid mode */
    int m_noremap; /* if non-zero no re-mapping for m_str */
    char m_silent; /* <silent> used, don't echo commands */
#ifdef FEAT_EVAL
    char m_expr; /* <expr> used, m_str is an expression */
    scid_T m_script_ID; /* ID of script where map was defined */
#endif
};

/*
* Used for highlighting in the status line.
*/
struct stl_hlrec
{
    char_u *start;
    int userhl; /* 0: no HL, 1-9: User HL, < 0 for syn ID */
};


/*
* Syntax items - usually buffer-specific.
*/

/* Item for a hashtable. "hi_key" can be one of three values:
* NULL: Never been used
* HI_KEY_REMOVED: Entry was removed
* Otherwise: Used item, pointer to the actual key; this usually is
* inside the item, subtract an offset to locate the item.
* This reduces the size of hashitem by 1/3.
*/
typedef struct hashitem_S
{
    long_u hi_hash; /* cached hash number of hi_key */
    char_u *hi_key;
} hashitem_T;

/* The address of "hash_removed" is used as a magic number for hi_key to
* indicate a removed item. */
#define HI_KEY_REMOVED &hash_removed
#define HASHITEM_EMPTY(hi) ((hi)->hi_key == NULL || (hi)->hi_key == &hash_removed)

/* Initial size for a hashtable. Our items are relatively small and growing
* is expensive, thus use 16 as a start. Must be a power of 2. */
#define HT_INIT_SIZE 16

typedef struct hashtable_S
{
    long_u ht_mask; /* mask used for hash value (nr of items in
* array is "ht_mask" + 1) */
    long_u ht_used; /* number of items used */
    long_u ht_filled; /* number of items used + removed */
    int ht_locked; /* counter for hash_lock() */
    int ht_error; /* when set growing failed, can't add more
items before growing works */
    hashitem_T *ht_array; /* points to the array, allocated when it's
not "ht_smallarray" */
    hashitem_T ht_smallarray[HT_INIT_SIZE]; /* initial array */
} hashtab_T;

typedef long_u hash_T; /* Type for hi_hash */


#if SIZEOF_INT <= 3 /* use long if int is smaller than 32 bits */
typedef long varnumber_T;
#else
typedef int varnumber_T;
#endif
typedef double float_T;

typedef struct listvar_S list_T;
typedef struct dictvar_S dict_T;

/*
* Structure to hold an internal variable without a name.
*/
typedef struct
{
    char v_type; /* see below: VAR_NUMBER, VAR_STRING, etc. */
    char v_lock; /* see below: VAR_LOCKED, VAR_FIXED */
    union
    {
varnumber_T v_number; /* number value */
#ifdef FEAT_FLOAT
float_T v_float; /* floating number value */
#endif
char_u *v_string; /* string value (can be NULL!) */
list_T *v_list; /* list value (can be NULL!) */
dict_T *v_dict; /* dict value (can be NULL!) */
    } vval;
} typval_T;

/* Values for "v_type". */
#define VAR_UNKNOWN 0
#define VAR_NUMBER 1 /* "v_number" is used */
#define VAR_STRING 2 /* "v_string" is used */
#define VAR_FUNC 3 /* "v_string" is function name */
#define VAR_LIST 4 /* "v_list" is used */
#define VAR_DICT 5 /* "v_dict" is used */
#define VAR_FLOAT 6 /* "v_float" is used */

/* Values for "dv_scope". */
#define VAR_SCOPE 1 /* a:, v:, s:, etc. scope dictionaries */
#define VAR_DEF_SCOPE 2 /* l:, g: scope dictionaries: here funcrefs are not
allowed to mask existing functions */

/* Values for "v_lock". */
#define VAR_LOCKED 1 /* locked with lock(), can use unlock() */
#define VAR_FIXED 2 /* locked forever */

/*
* Structure to hold an item of a list: an internal variable without a name.
*/
typedef struct listitem_S listitem_T;

struct listitem_S
{
    listitem_T *li_next; /* next item in list */
    listitem_T *li_prev; /* previous item in list */
    typval_T li_tv; /* type and value of the variable */
};

/*
* Struct used by those that are using an item in a list.
*/
typedef struct listwatch_S listwatch_T;

struct listwatch_S
{
    listitem_T *lw_item; /* item being watched */
    listwatch_T *lw_next; /* next watcher */
};

/*
* Structure to hold info about a list.
*/
struct listvar_S
{
    listitem_T *lv_first; /* first item, NULL if none */
    listitem_T *lv_last; /* last item, NULL if none */
    int lv_refcount; /* reference count */
    int lv_len; /* number of items */
    listwatch_T *lv_watch; /* first watcher, NULL if none */
    int lv_idx; /* cached index of an item */
    listitem_T *lv_idx_item; /* when not NULL item at index "lv_idx" */
    int lv_copyID; /* ID used by deepcopy() */
    list_T *lv_copylist; /* copied list used by deepcopy() */
    char lv_lock; /* zero, VAR_LOCKED, VAR_FIXED */
    list_T *lv_used_next; /* next list in used lists list */
    list_T *lv_used_prev; /* previous list in used lists list */
};

/*
* Structure to hold an item of a Dictionary.
* Also used for a variable.
* The key is copied into "di_key" to avoid an extra alloc/free for it.
*/
struct dictitem_S
{
    typval_T di_tv; /* type and value of the variable */
    char_u di_flags; /* flags (only used for variable) */
    char_u di_key[1]; /* key (actually longer!) */
};

typedef struct dictitem_S dictitem_T;

#define DI_FLAGS_RO 1 /* "di_flags" value: read-only variable */
#define DI_FLAGS_RO_SBX 2 /* "di_flags" value: read-only in the sandbox */
#define DI_FLAGS_FIX 4 /* "di_flags" value: fixed variable, not allocated */
#define DI_FLAGS_LOCK 8 /* "di_flags" value: locked variable */

/*
* Structure to hold info about a Dictionary.
*/
struct dictvar_S
{
    int dv_refcount; /* reference count */
    hashtab_T dv_hashtab; /* hashtab that refers to the items */
    int dv_copyID; /* ID used by deepcopy() */
    dict_T *dv_copydict; /* copied dict used by deepcopy() */
    char dv_lock; /* zero, VAR_LOCKED, VAR_FIXED */
    char dv_scope; /* zero, VAR_SCOPE, VAR_DEF_SCOPE */
    dict_T *dv_used_next; /* next dict in used dicts list */
    dict_T *dv_used_prev; /* previous dict in used dicts list */
};

/* values for b_syn_spell: what to do with toplevel text */
#define SYNSPL_DEFAULT 0 /* spell check if @Spell not defined */
#define SYNSPL_TOP 1 /* spell check toplevel text */
#define SYNSPL_NOTOP 2 /* don't spell check toplevel text */

/* avoid #ifdefs for when b_spell is not available */
#ifdef FEAT_SPELL
# define B_SPELL(buf) ((buf)->b_spell)
#else
# define B_SPELL(buf) (0)
#endif

#ifdef FEAT_QUICKFIX
typedef struct qf_info_S qf_info_T;
#endif

/*
* These are items normally related to a buffer. But when using ":ownsyntax"
* a window may have its own instance.
*/
typedef struct {
#ifdef FEAT_SYN_HL
    hashtab_T b_keywtab; /* syntax keywords hash table */
    hashtab_T b_keywtab_ic; /* idem, ignore case */
    int b_syn_error; /* TRUE when error occured in HL */
    int b_syn_ic; /* ignore case for :syn cmds */
    int b_syn_spell; /* SYNSPL_ values */
    garray_T b_syn_patterns; /* table for syntax patterns */
    garray_T b_syn_clusters; /* table for syntax clusters */
    int b_spell_cluster_id; /* @Spell cluster ID or 0 */
    int b_nospell_cluster_id; /* @NoSpell cluster ID or 0 */
    int b_syn_containedin; /* TRUE when there is an item with a
"containedin" argument */
    int b_syn_sync_flags; /* flags about how to sync */
    short b_syn_sync_id; /* group to sync on */
    long b_syn_sync_minlines; /* minimal sync lines offset */
    long b_syn_sync_maxlines; /* maximal sync lines offset */
    long b_syn_sync_linebreaks; /* offset for multi-line pattern */
    char_u *b_syn_linecont_pat; /* line continuation pattern */
    regprog_T *b_syn_linecont_prog; /* line continuation program */
    int b_syn_linecont_ic; /* ignore-case flag for above */
    int b_syn_topgrp; /* for ":syntax include" */
# ifdef FEAT_CONCEAL
    int b_syn_conceal; /* auto-conceal for :syn cmds */
# endif
# ifdef FEAT_FOLDING
    int b_syn_folditems; /* number of patterns with the HL_FOLD
flag set */
# endif
    /*
* b_sst_array[] contains the state stack for a number of lines, for the
* start of that line (col == 0). This avoids having to recompute the
* syntax state too often.
* b_sst_array[] is allocated to hold the state for all displayed lines,
* and states for 1 out of about 20 other lines.
* b_sst_array pointer to an array of synstate_T
* b_sst_len number of entries in b_sst_array[]
* b_sst_first pointer to first used entry in b_sst_array[] or NULL
* b_sst_firstfree pointer to first free entry in b_sst_array[] or NULL
* b_sst_freecount number of free entries in b_sst_array[]
* b_sst_check_lnum entries after this lnum need to be checked for
* validity (MAXLNUM means no check needed)
*/
    synstate_T *b_sst_array;
    int b_sst_len;
    synstate_T *b_sst_first;
    synstate_T *b_sst_firstfree;
    int b_sst_freecount;
    linenr_T b_sst_check_lnum;
    short_u b_sst_lasttick; /* last display tick */
#endif /* FEAT_SYN_HL */

#ifdef FEAT_SPELL
    /* for spell checking */
    garray_T b_langp; /* list of pointers to slang_T, see spell.c */
    char_u b_spell_ismw[256];/* flags: is midword char */
# ifdef FEAT_MBYTE
    char_u *b_spell_ismw_mb; /* multi-byte midword chars */
# endif
    char_u *b_p_spc; /* 'spellcapcheck' */
    regprog_T *b_cap_prog; /* program for 'spellcapcheck' */
    char_u *b_p_spf; /* 'spellfile' */
    char_u *b_p_spl; /* 'spelllang' */
#endif
#if !defined(FEAT_SYN_HL) && !defined(FEAT_SPELL)
    int dummy;
#endif
} synblock_T;


/*
* buffer: structure that holds information about one file
*
* Several windows can share a single Buffer
* A buffer is unallocated if there is no memfile for it.
* A buffer is new if the associated file has never been loaded yet.
*/

struct file_buffer
{
    memline_T b_ml; /* associated memline (also contains line
count) */

    buf_T *b_next; /* links in list of buffers */
    buf_T *b_prev;

    int b_nwindows; /* nr of windows open on this buffer */

    int b_flags; /* various BF_ flags */
#ifdef FEAT_AUTOCMD
    int b_closing; /* buffer is being closed, don't let
autocommands close it too. */
#endif

    /*
* b_ffname has the full path of the file (NULL for no name).
* b_sfname is the name as the user typed it (or NULL).
* b_fname is the same as b_sfname, unless ":cd" has been done,
* then it is the same as b_ffname (NULL for no name).
*/
    char_u *b_ffname; /* full path file name */
    char_u *b_sfname; /* short file name */
    char_u *b_fname; /* current file name */

#ifdef UNIX
    int b_dev_valid; /* TRUE when b_dev has a valid number */
    dev_t b_dev; /* device number */
    ino_t b_ino; /* inode number */
#endif
#ifdef FEAT_CW_EDITOR
    FSSpec b_FSSpec; /* MacOS File Identification */
#endif
#ifdef VMS
    char b_fab_rfm; /* Record format */
    char b_fab_rat; /* Record attribute */
    unsigned int b_fab_mrs; /* Max record size */
#endif
#ifdef FEAT_SNIFF
    int b_sniff; /* file was loaded through Sniff */
#endif

    int b_fnum; /* buffer number for this file. */

    int b_changed; /* 'modified': Set to TRUE if something in the
file has been changed and not written out. */
    int b_changedtick; /* incremented for each change, also for undo */

    int b_saving; /* Set to TRUE if we are in the middle of
saving the buffer. */

    /*
* Changes to a buffer require updating of the display. To minimize the
* work, remember changes made and update everything at once.
*/
    int b_mod_set; /* TRUE when there are changes since the last
time the display was updated */
    linenr_T b_mod_top; /* topmost lnum that was changed */
    linenr_T b_mod_bot; /* lnum below last changed line, AFTER the
change */
    long b_mod_xlines; /* number of extra buffer lines inserted;
negative when lines were deleted */

    wininfo_T *b_wininfo; /* list of last used info for each window */

    long b_mtime; /* last change time of original file */
    long b_mtime_read; /* last change time when reading */
    off_t b_orig_size; /* size of original file in bytes */
    int b_orig_mode; /* mode of original file */

    pos_T b_namedm[NMARKS]; /* current named marks (mark.c) */

#ifdef FEAT_VISUAL
    /* These variables are set when VIsual_active becomes FALSE */
    visualinfo_T b_visual;
# ifdef FEAT_EVAL
    int b_visual_mode_eval; /* b_visual.vi_mode for visualmode() */
# endif
#endif

    pos_T b_last_cursor; /* cursor position when last unloading this
buffer */
    pos_T b_last_insert; /* where Insert mode was left */
    pos_T b_last_change; /* position of last change: '. mark */

#ifdef FEAT_JUMPLIST
    /*
* the changelist contains old change positions
*/
    pos_T b_changelist[JUMPLISTSIZE];
    int b_changelistlen; /* number of active entries */
    int b_new_change; /* set by u_savecommon() */
#endif

    /*
* Character table, only used in charset.c for 'iskeyword'
* 32 bytes of 8 bits: 1 bit per character 0-255.
*/
    char_u b_chartab[32];

#ifdef FEAT_LOCALMAP
    /* Table used for mappings local to a buffer. */
    mapblock_T *(b_maphash[256]);

    /* First abbreviation local to a buffer. */
    mapblock_T *b_first_abbr;
#endif
#ifdef FEAT_USR_CMDS
    /* User commands local to the buffer. */
    garray_T b_ucmds;
#endif
    /*
* start and end of an operator, also used for '[ and ']
*/
    pos_T b_op_start;
    pos_T b_op_end;

#ifdef FEAT_VIMINFO
    int b_marks_read; /* Have we read viminfo marks yet? */
#endif

    /*
* The following only used in undo.c.
*/
    u_header_T *b_u_oldhead; /* pointer to oldest header */
    u_header_T *b_u_newhead; /* pointer to newest header; may not be valid
if b_u_curhead is not NULL */
    u_header_T *b_u_curhead; /* pointer to current header */
    int b_u_numhead; /* current number of headers */
    int b_u_synced; /* entry lists are synced */
    long b_u_seq_last; /* last used undo sequence number */
    long b_u_save_nr_last; /* counter for last file write */
    long b_u_seq_cur; /* hu_seq of header below which we are now */
    time_t b_u_time_cur; /* uh_time of header below which we are now */
    long b_u_save_nr_cur; /* file write nr after which we are now */

    /*
* variables for "U" command in undo.c
*/
    char_u *b_u_line_ptr; /* saved line for "U" command */
    linenr_T b_u_line_lnum; /* line number of line in u_line */
    colnr_T b_u_line_colnr; /* optional column number */

#ifdef FEAT_INS_EXPAND
    int b_scanned; /* ^N/^P have scanned this buffer */
#endif

    /* flags for use of ":lmap" and IM control */
    long b_p_iminsert; /* input mode for insert */
    long b_p_imsearch; /* input mode for search */
#define B_IMODE_USE_INSERT -1 /* Use b_p_iminsert value for search */
#define B_IMODE_NONE 0 /* Input via none */
#define B_IMODE_LMAP 1 /* Input via langmap */
#ifndef USE_IM_CONTROL
# define B_IMODE_LAST 1
#else
# define B_IMODE_IM 2 /* Input via input method */
# define B_IMODE_LAST 2
#endif

#ifdef FEAT_KEYMAP
    short b_kmap_state; /* using "lmap" mappings */
# define KEYMAP_INIT 1 /* 'keymap' was set, call keymap_init() */
# define KEYMAP_LOADED 2 /* 'keymap' mappings have been loaded */
    garray_T b_kmap_ga; /* the keymap table */
#endif

    /*
* Options local to a buffer.
* They are here because their value depends on the type of file
* or contents of the file being edited.
*/
    int b_p_initialized; /* set when options initialized */

#ifdef FEAT_EVAL
    int b_p_scriptID[BV_COUNT]; /* SIDs for buffer-local options */
#endif

    int b_p_ai; /* 'autoindent' */
    int b_p_ai_nopaste; /* b_p_ai saved for paste mode */
    int b_p_ci; /* 'copyindent' */
    int b_p_bin; /* 'binary' */
#ifdef FEAT_MBYTE
    int b_p_bomb; /* 'bomb' */
#endif
#if defined(FEAT_QUICKFIX)
    char_u *b_p_bh; /* 'bufhidden' */
    char_u *b_p_bt; /* 'buftype' */
#endif
    int b_p_bl; /* 'buflisted' */
#ifdef FEAT_CINDENT
    int b_p_cin; /* 'cindent' */
    char_u *b_p_cino; /* 'cinoptions' */
    char_u *b_p_cink; /* 'cinkeys' */
#endif
#if defined(FEAT_CINDENT) || defined(FEAT_SMARTINDENT)
    char_u *b_p_cinw; /* 'cinwords' */
#endif
#ifdef FEAT_COMMENTS
    char_u *b_p_com; /* 'comments' */
#endif
#ifdef FEAT_FOLDING
    char_u *b_p_cms; /* 'commentstring' */
#endif
#ifdef FEAT_INS_EXPAND
    char_u *b_p_cpt; /* 'complete' */
#endif
#ifdef FEAT_COMPL_FUNC
    char_u *b_p_cfu; /* 'completefunc' */
    char_u *b_p_ofu; /* 'omnifunc' */
#endif
    int b_p_eol; /* 'endofline' */
    int b_p_et; /* 'expandtab' */
    int b_p_et_nobin; /* b_p_et saved for binary mode */
#ifdef FEAT_MBYTE
    char_u *b_p_fenc; /* 'fileencoding' */
#endif
    char_u *b_p_ff; /* 'fileformat' */
#ifdef FEAT_AUTOCMD
    char_u *b_p_ft; /* 'filetype' */
#endif
    char_u *b_p_fo; /* 'formatoptions' */
    char_u *b_p_flp; /* 'formatlistpat' */
    int b_p_inf; /* 'infercase' */
    char_u *b_p_isk; /* 'iskeyword' */
#ifdef FEAT_FIND_ID
    char_u *b_p_def; /* 'define' local value */
    char_u *b_p_inc; /* 'include' */
# ifdef FEAT_EVAL
    char_u *b_p_inex; /* 'includeexpr' */
    long_u b_p_inex_flags; /* flags for 'includeexpr' */
# endif
#endif
#if defined(FEAT_CINDENT) && defined(FEAT_EVAL)
    char_u *b_p_inde; /* 'indentexpr' */
    long_u b_p_inde_flags; /* flags for 'indentexpr' */
    char_u *b_p_indk; /* 'indentkeys' */
#endif
#if defined(FEAT_EVAL)
    char_u *b_p_fex; /* 'formatexpr' */
    long_u b_p_fex_flags; /* flags for 'formatexpr' */
#endif
#ifdef FEAT_CRYPT
    char_u *b_p_key; /* 'key' */
#endif
    char_u *b_p_kp; /* 'keywordprg' */
#ifdef FEAT_LISP
    int b_p_lisp; /* 'lisp' */
#endif
    char_u *b_p_mps; /* 'matchpairs' */
    int b_p_ml; /* 'modeline' */
    int b_p_ml_nobin; /* b_p_ml saved for binary mode */
    int b_p_ma; /* 'modifiable' */
    char_u *b_p_nf; /* 'nrformats' */
    int b_p_pi; /* 'preserveindent' */
#ifdef FEAT_TEXTOBJ
    char_u *b_p_qe; /* 'quoteescape' */
#endif
    int b_p_ro; /* 'readonly' */
    long b_p_sw; /* 'shiftwidth' */
#ifndef SHORT_FNAME
    int b_p_sn; /* 'shortname' */
#endif
#ifdef FEAT_SMARTINDENT
    int b_p_si; /* 'smartindent' */
#endif
    long b_p_sts; /* 'softtabstop' */
    long b_p_sts_nopaste; /* b_p_sts saved for paste mode */
#ifdef FEAT_SEARCHPATH
    char_u *b_p_sua; /* 'suffixesadd' */
#endif
    int b_p_swf; /* 'swapfile' */
#ifdef FEAT_SYN_HL
    long b_p_smc; /* 'synmaxcol' */
    char_u *b_p_syn; /* 'syntax' */
#endif
    long b_p_ts; /* 'tabstop' */
    int b_p_tx; /* 'textmode' */
    long b_p_tw; /* 'textwidth' */
    long b_p_tw_nobin; /* b_p_tw saved for binary mode */
    long b_p_tw_nopaste; /* b_p_tw saved for paste mode */
    long b_p_wm; /* 'wrapmargin' */
    long b_p_wm_nobin; /* b_p_wm saved for binary mode */
    long b_p_wm_nopaste; /* b_p_wm saved for paste mode */
#ifdef FEAT_KEYMAP
    char_u *b_p_keymap; /* 'keymap' */
#endif

    /* local values for options which are normally global */
#ifdef FEAT_QUICKFIX
    char_u *b_p_gp; /* 'grepprg' local value */
    char_u *b_p_mp; /* 'makeprg' local value */
    char_u *b_p_efm; /* 'errorformat' local value */
#endif
    char_u *b_p_ep; /* 'equalprg' local value */
    char_u *b_p_path; /* 'path' local value */
    int b_p_ar; /* 'autoread' local value */
    char_u *b_p_tags; /* 'tags' local value */
#ifdef FEAT_INS_EXPAND
    char_u *b_p_dict; /* 'dictionary' local value */
    char_u *b_p_tsr; /* 'thesaurus' local value */
#endif
#ifdef FEAT_PERSISTENT_UNDO
    int b_p_udf; /* 'undofile' */
#endif
#ifdef FEAT_GUI_MACVIM
    int b_p_mmta; /* 'macmeta' local value */
#endif

    /* end of buffer options */

    linenr_T b_no_eol_lnum; /* non-zero lnum when last line of next binary
* write should not have an end-of-line */

    int b_start_eol; /* last line had eol when it was read */
    int b_start_ffc; /* first char of 'ff' when edit started */
#ifdef FEAT_MBYTE
    char_u *b_start_fenc; /* 'fileencoding' when edit started or NULL */
    int b_bad_char; /* "++bad=" argument when edit started or 0 */
    int b_start_bomb; /* 'bomb' when it was read */
#endif

#ifdef FEAT_EVAL
    dictitem_T b_bufvar; /* variable for "b:" Dictionary */
    dict_T b_vars; /* internal variables, local to buffer */
#endif

#if defined(FEAT_BEVAL) && defined(FEAT_EVAL)
    char_u *b_p_bexpr; /* 'balloonexpr' local value */
    long_u b_p_bexpr_flags;/* flags for 'balloonexpr' */
#endif
#ifdef FEAT_CRYPT
    char_u *b_p_cm; /* 'cryptmethod' */
#endif

    /* When a buffer is created, it starts without a swap file. b_may_swap is
* then set to indicate that a swap file may be opened later. It is reset
* if a swap file could not be opened.
*/
    int b_may_swap;
    int b_did_warn; /* Set to 1 if user has been warned on first
change of a read-only file */

    /* Two special kinds of buffers:
* help buffer - used for help files, won't use a swap file.
* spell buffer - used for spell info, never displayed and doesn't have a
* file name.
*/
    int b_help; /* TRUE for help file buffer (when set b_p_bt
is "help") */
#ifdef FEAT_SPELL
    int b_spell; /* TRUE for a spell file buffer, most fields
are not used! Use the B_SPELL macro to
access b_spell without #ifdef. */
#endif

#ifndef SHORT_FNAME
    int b_shortname; /* this file has an 8.3 file name */
#endif

#ifdef FEAT_MZSCHEME
    void *b_mzscheme_ref; /* The MzScheme reference to this buffer */
#endif

#ifdef FEAT_PERL
    void *b_perl_private;
#endif

#ifdef FEAT_PYTHON
    void *b_python_ref; /* The Python reference to this buffer */
#endif

#ifdef FEAT_PYTHON3
    void *b_python3_ref; /* The Python3 reference to this buffer */
#endif

#ifdef FEAT_TCL
    void *b_tcl_ref;
#endif

#ifdef FEAT_RUBY
    void *b_ruby_ref;
#endif

#if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
    synblock_T b_s; /* Info related to syntax highlighting. w_s
* normally points to this, but some windows
* may use a different synblock_T. */
#endif

#ifdef FEAT_SIGNS
    signlist_T *b_signlist; /* list of signs to draw */
#endif

#ifdef FEAT_NETBEANS_INTG
    int b_netbeans_file; /* TRUE when buffer is owned by NetBeans */
    int b_was_netbeans_file;/* TRUE if b_netbeans_file was once set */
#endif

#ifdef FEAT_ODB_EDITOR
    uint32_t b_odb_server_id; /* FourCC of the ODB server (0 if none) */
    void *b_odb_token; /* NSAppleEventDescriptor (optional) */
    char_u *b_odb_fname; /* Custom file name (optional) */
#endif
};


#ifdef FEAT_DIFF
/*
* Stuff for diff mode.
*/
# define DB_COUNT 4 /* up to four buffers can be diff'ed */

/*
* Each diffblock defines where a block of lines starts in each of the buffers
* and how many lines it occupies in that buffer. When the lines are missing
* in the buffer the df_count[] is zero. This is all counted in
* buffer lines.
* There is always at least one unchanged line in between the diffs.
* Otherwise it would have been included in the diff above or below it.
* df_lnum[] + df_count[] is the lnum below the change. When in one buffer
* lines have been inserted, in the other buffer df_lnum[] is the line below
* the insertion and df_count[] is zero. When appending lines at the end of
* the buffer, df_lnum[] is one beyond the end!
* This is using a linked list, because the number of differences is expected
* to be reasonable small. The list is sorted on lnum.
*/
typedef struct diffblock_S diff_T;
struct diffblock_S
{
    diff_T *df_next;
    linenr_T df_lnum[DB_COUNT]; /* line number in buffer */
    linenr_T df_count[DB_COUNT]; /* nr of inserted/changed lines */
};
#endif

#define SNAP_HELP_IDX 0
#ifdef FEAT_AUTOCMD
# define SNAP_AUCMD_IDX 1
# define SNAP_COUNT 2
#else
# define SNAP_COUNT 1
#endif

/*
* Tab pages point to the top frame of each tab page.
* Note: Most values are NOT valid for the current tab page! Use "curwin",
* "firstwin", etc. for that. "tp_topframe" is always valid and can be
* compared against "topframe" to find the current tab page.
*/
typedef struct tabpage_S tabpage_T;
struct tabpage_S
{
    tabpage_T *tp_next; /* next tabpage or NULL */
    frame_T *tp_topframe; /* topframe for the windows */
    win_T *tp_curwin; /* current window in this Tab page */
    win_T *tp_prevwin; /* previous window in this Tab page */
    win_T *tp_firstwin; /* first window in this Tab page */
    win_T *tp_lastwin; /* last window in this Tab page */
    long tp_old_Rows; /* Rows when Tab page was left */
    long tp_old_Columns; /* Columns when Tab page was left */
    long tp_ch_used; /* value of 'cmdheight' when frame size
was set */
#ifdef FEAT_GUI
    int tp_prev_which_scrollbars[3];
/* previous value of which_scrollbars */
#endif
#ifdef FEAT_DIFF
    diff_T *tp_first_diff;
    buf_T *(tp_diffbuf[DB_COUNT]);
    int tp_diff_invalid; /* list of diffs is outdated */
#endif
    frame_T *(tp_snapshot[SNAP_COUNT]); /* window layout snapshots */
#ifdef FEAT_EVAL
    dictitem_T tp_winvar; /* variable for "t:" Dictionary */
    dict_T tp_vars; /* internal variables, local to tab page */
#endif
};

/*
* Structure to cache info for displayed lines in w_lines[].
* Each logical line has one entry.
* The entry tells how the logical line is currently displayed in the window.
* This is updated when displaying the window.
* When the display is changed (e.g., when clearing the screen) w_lines_valid
* is changed to exclude invalid entries.
* When making changes to the buffer, wl_valid is reset to indicate wl_size
* may not reflect what is actually in the buffer. When wl_valid is FALSE,
* the entries can only be used to count the number of displayed lines used.
* wl_lnum and wl_lastlnum are invalid too.
*/
typedef struct w_line
{
    linenr_T wl_lnum; /* buffer line number for logical line */
    short_u wl_size; /* height in screen lines */
    char wl_valid; /* TRUE values are valid for text in buffer */
#ifdef FEAT_FOLDING
    char wl_folded; /* TRUE when this is a range of folded lines */
    linenr_T wl_lastlnum; /* last buffer line number for logical line */
#endif
} wline_T;

/*
* Windows are kept in a tree of frames. Each frame has a column (FR_COL)
* or row (FR_ROW) layout or is a leaf, which has a window.
*/
struct frame_S
{
    char fr_layout; /* FR_LEAF, FR_COL or FR_ROW */
#ifdef FEAT_VERTSPLIT
    int fr_width;
    int fr_newwidth; /* new width used in win_equal_rec() */
#endif
    int fr_height;
    int fr_newheight; /* new height used in win_equal_rec() */
    frame_T *fr_parent; /* containing frame or NULL */
    frame_T *fr_next; /* frame right or below in same parent, NULL
for first */
    frame_T *fr_prev; /* frame left or above in same parent, NULL
for last */
    /* fr_child and fr_win are mutually exclusive */
    frame_T *fr_child; /* first contained frame */
    win_T *fr_win; /* window that fills this frame */
};

#define FR_LEAF 0 /* frame is a leaf */
#define FR_ROW 1 /* frame with a row of windows */
#define FR_COL 2 /* frame with a column of windows */

/*
* Struct used for highlighting 'hlsearch' matches, matches defined by
* ":match" and matches defined by match functions.
* For 'hlsearch' there is one pattern for all windows. For ":match" and the
* match functions there is a different pattern for each window.
*/
typedef struct
{
    regmmatch_T rm; /* points to the regexp program; contains last found
match (may continue in next line) */
    buf_T *buf; /* the buffer to search for a match */
    linenr_T lnum; /* the line to search for a match */
    int attr; /* attributes to be used for a match */
    int attr_cur; /* attributes currently active in win_line() */
    linenr_T first_lnum; /* first lnum to search for multi-line pat */
    colnr_T startcol; /* in win_line() points to char where HL starts */
    colnr_T endcol; /* in win_line() points to char where HL ends */
#ifdef FEAT_RELTIME
    proftime_T tm; /* for a time limit */
#endif
} match_T;

/*
* matchitem_T provides a linked list for storing match items for ":match" and
* the match functions.
*/
typedef struct matchitem matchitem_T;
struct matchitem
{
    matchitem_T *next;
    int id; /* match ID */
    int priority; /* match priority */
    char_u *pattern; /* pattern to highlight */
    int hlg_id; /* highlight group ID */
    regmmatch_T match; /* regexp program for pattern */
    match_T hl; /* struct for doing the actual highlighting */
};

/*
* Structure which contains all information that belongs to a window
*
* All row numbers are relative to the start of the window, except w_winrow.
*/
struct window_S
{
    buf_T *w_buffer; /* buffer we are a window into (used
often, keep it the first item!) */

#if defined(FEAT_SYN_HL) || defined(FEAT_SPELL)
    synblock_T *w_s; /* for :ownsyntax */
#endif

#ifdef FEAT_WINDOWS
    win_T *w_prev; /* link to previous window */
    win_T *w_next; /* link to next window */
#endif
#ifdef FEAT_AUTOCMD
    int w_closing; /* window is being closed, don't let
autocommands close it too. */
#endif

    frame_T *w_frame; /* frame containing this window */

    pos_T w_cursor; /* cursor position in buffer */

    colnr_T w_curswant; /* The column we'd like to be at. This is
used to try to stay in the same column
for up/down cursor motions. */

    int w_set_curswant; /* If set, then update w_curswant the next
time through cursupdate() to the
current virtual column */

#ifdef FEAT_VISUAL
    /*
* the next six are used to update the visual part
*/
    char w_old_visual_mode; /* last known VIsual_mode */
    linenr_T w_old_cursor_lnum; /* last known end of visual part */
    colnr_T w_old_cursor_fcol; /* first column for block visual part */
    colnr_T w_old_cursor_lcol; /* last column for block visual part */
    linenr_T w_old_visual_lnum; /* last known start of visual part */
    colnr_T w_old_visual_col; /* last known start of visual part */
    colnr_T w_old_curswant; /* last known value of Curswant */
#endif

    /*
* "w_topline", "w_leftcol" and "w_skipcol" specify the offsets for
* displaying the buffer.
*/
    linenr_T w_topline; /* buffer line number of the line at the
top of the window */
#ifdef FEAT_AUTOCMD
    char w_topline_was_set; /* flag set to TRUE when topline is set,
e.g. by winrestview() */
#endif
#ifdef FEAT_DIFF
    int w_topfill; /* number of filler lines above w_topline */
    int w_old_topfill; /* w_topfill at last redraw */
    int w_botfill; /* TRUE when filler lines are actually
below w_topline (at end of file) */
    int w_old_botfill; /* w_botfill at last redraw */
#endif
    colnr_T w_leftcol; /* window column number of the left most
character in the window; used when
'wrap' is off */
    colnr_T w_skipcol; /* starting column when a single line
doesn't fit in the window */

    /*
* Layout of the window in the screen.
* May need to add "msg_scrolled" to "w_winrow" in rare situations.
*/
#ifdef FEAT_WINDOWS
    int w_winrow; /* first row of window in screen */
#endif
    int w_height; /* number of rows in window, excluding
status/command line(s) */
#ifdef FEAT_WINDOWS
    int w_status_height; /* number of status lines (0 or 1) */
#endif
#ifdef FEAT_VERTSPLIT
    int w_wincol; /* Leftmost column of window in screen.
use W_WINCOL() */
    int w_width; /* Width of window, excluding separation.
use W_WIDTH() */
    int w_vsep_width; /* Number of separator columns (0 or 1).
use W_VSEP_WIDTH() */
#endif

    /*
* === start of cached values ====
*/
    /*
* Recomputing is minimized by storing the result of computations.
* Use functions in screen.c to check if they are valid and to update.
* w_valid is a bitfield of flags, which indicate if specific values are
* valid or need to be recomputed. See screen.c for values.
*/
    int w_valid;
    pos_T w_valid_cursor; /* last known position of w_cursor, used
to adjust w_valid */
    colnr_T w_valid_leftcol; /* last known w_leftcol */

    /*
* w_cline_height is the number of physical lines taken by the buffer line
* that the cursor is on. We use this to avoid extra calls to plines().
*/
    int w_cline_height; /* current size of cursor line */
#ifdef FEAT_FOLDING
    int w_cline_folded; /* cursor line is folded */
#endif

    int w_cline_row; /* starting row of the cursor line */

    colnr_T w_virtcol; /* column number of the cursor in the
buffer line, as opposed to the column
number we're at on the screen. This
makes a difference on lines which span
more than one screen line or when
w_leftcol is non-zero */

    /*
* w_wrow and w_wcol specify the cursor position in the window.
* This is related to positions in the window, not in the display or
* buffer, thus w_wrow is relative to w_winrow.
*/
    int w_wrow, w_wcol; /* cursor position in window */

    linenr_T w_botline; /* number of the line below the bottom of
the screen */
    int w_empty_rows; /* number of ~ rows in window */
#ifdef FEAT_DIFF
    int w_filler_rows; /* number of filler rows at the end of the
window */
#endif

    /*
* Info about the lines currently in the window is remembered to avoid
* recomputing it every time. The allocated size of w_lines[] is Rows.
* Only the w_lines_valid entries are actually valid.
* When the display is up-to-date w_lines[0].wl_lnum is equal to w_topline
* and w_lines[w_lines_valid - 1].wl_lnum is equal to w_botline.
* Between changing text and updating the display w_lines[] represents
* what is currently displayed. wl_valid is reset to indicated this.
* This is used for efficient redrawing.
*/
    int w_lines_valid; /* number of valid entries */
    wline_T *w_lines;

#ifdef FEAT_FOLDING
    garray_T w_folds; /* array of nested folds */
    char w_fold_manual; /* when TRUE: some folds are opened/closed
manually */
    char w_foldinvalid; /* when TRUE: folding needs to be
recomputed */
#endif
#ifdef FEAT_LINEBREAK
    int w_nrwidth; /* width of 'number' and 'relativenumber'
column being used */
#endif

    /*
* === end of cached values ===
*/

    int w_redr_type; /* type of redraw to be performed on win */
    int w_upd_rows; /* number of window lines to update when
w_redr_type is REDRAW_TOP */
    linenr_T w_redraw_top; /* when != 0: first line needing redraw */
    linenr_T w_redraw_bot; /* when != 0: last line needing redraw */
#ifdef FEAT_WINDOWS
    int w_redr_status; /* if TRUE status line must be redrawn */
#endif

#ifdef FEAT_CMDL_INFO
    /* remember what is shown in the ruler for this window (if 'ruler' set) */
    pos_T w_ru_cursor; /* cursor position shown in ruler */
    colnr_T w_ru_virtcol; /* virtcol shown in ruler */
    linenr_T w_ru_topline; /* topline shown in ruler */
    linenr_T w_ru_line_count; /* line count used for ruler */
# ifdef FEAT_DIFF
    int w_ru_topfill; /* topfill shown in ruler */
# endif
    char w_ru_empty; /* TRUE if ruler shows 0-1 (empty line) */
#endif

    int w_alt_fnum; /* alternate file (for # and CTRL-^) */

#ifdef FEAT_WINDOWS
    alist_T *w_alist; /* pointer to arglist for this window */
#endif
    int w_arg_idx; /* current index in argument list (can be
out of range!) */
    int w_arg_idx_invalid; /* editing another file than w_arg_idx */

    char_u *w_localdir; /* absolute path of local directory or
NULL */
    /*
* Options local to a window.
* They are local because they influence the layout of the window or
* depend on the window layout.
* There are two values: w_onebuf_opt is local to the buffer currently in
* this window, w_allbuf_opt is for all buffers in this window.
*/
    winopt_T w_onebuf_opt;
    winopt_T w_allbuf_opt;

    /* A few options have local flags for P_INSECURE. */
#ifdef FEAT_STL_OPT
    long_u w_p_stl_flags; /* flags for 'statusline' */
#endif
#ifdef FEAT_EVAL
    long_u w_p_fde_flags; /* flags for 'foldexpr' */
    long_u w_p_fdt_flags; /* flags for 'foldtext' */
#endif
#ifdef FEAT_SYN_HL
    int *w_p_cc_cols; /* array of columns to highlight or NULL */
#endif

    /* transform a pointer to a "onebuf" option into a "allbuf" option */
#define GLOBAL_WO(p) ((char *)p + sizeof(winopt_T))

#ifdef FEAT_SCROLLBIND
    long w_scbind_pos;
#endif

#ifdef FEAT_EVAL
    dictitem_T w_winvar; /* variable for "w:" Dictionary */
    dict_T w_vars; /* internal variables, local to window */
#endif

#if defined(FEAT_RIGHTLEFT) && defined(FEAT_FKMAP)
    int w_farsi; /* for the window dependent Farsi functions */
#endif

    /*
* The w_prev_pcmark field is used to check whether we really did jump to
* a new line after setting the w_pcmark. If not, then we revert to
* using the previous w_pcmark.
*/
    pos_T w_pcmark; /* previous context mark */
    pos_T w_prev_pcmark; /* previous w_pcmark */

#ifdef FEAT_JUMPLIST
    /*
* the jumplist contains old cursor positions
*/
    xfmark_T w_jumplist[JUMPLISTSIZE];
    int w_jumplistlen; /* number of active entries */
    int w_jumplistidx; /* current position */

    int w_changelistidx; /* current position in b_changelist */
#endif

#ifdef FEAT_SEARCH_EXTRA
    matchitem_T *w_match_head; /* head of match list */
    int w_next_match_id; /* next match ID */
#endif

    /*
* the tagstack grows from 0 upwards:
* entry 0: older
* entry 1: newer
* entry 2: newest
*/
    taggy_T w_tagstack[TAGSTACKSIZE]; /* the tag stack */
    int w_tagstackidx; /* idx just below active entry */
    int w_tagstacklen; /* number of tags on stack */

    /*
* w_fraction is the fractional row of the cursor within the window, from
* 0 at the top row to FRACTION_MULT at the last row.
* w_prev_fraction_row was the actual cursor row when w_fraction was last
* calculated.
*/
    int w_fraction;
    int w_prev_fraction_row;

#ifdef FEAT_GUI
    scrollbar_T w_scrollbars[2]; /* vert. Scrollbars for this window */
#endif
#ifdef FEAT_LINEBREAK
    linenr_T w_nrwidth_line_count; /* line count when ml_nrwidth_width
* was computed. */
    int w_nrwidth_width; /* nr of chars to print line count. */
#endif

#ifdef FEAT_QUICKFIX
    qf_info_T *w_llist; /* Location list for this window */
    /*
* Location list reference used in the location list window.
* In a non-location list window, w_llist_ref is NULL.
*/
    qf_info_T *w_llist_ref;
#endif


#ifdef FEAT_MZSCHEME
    void *w_mzscheme_ref; /* The MzScheme value for this window */
#endif

#ifdef FEAT_PERL
    void *w_perl_private;
#endif

#ifdef FEAT_PYTHON
    void *w_python_ref; /* The Python value for this window */
#endif

#ifdef FEAT_PYTHON3
    void *w_python3_ref; /* The Python value for this window */
#endif

#ifdef FEAT_TCL
    void *w_tcl_ref;
#endif

#ifdef FEAT_RUBY
    void *w_ruby_ref;
#endif
};

/*
* Arguments for operators.
*/
typedef struct oparg_S
{
    int op_type; /* current pending operator type */
    int regname; /* register to use for the operator */
    int motion_type; /* type of the current cursor motion */
    int motion_force; /* force motion type: 'v', 'V' or CTRL-V */
    int use_reg_one; /* TRUE if delete uses reg 1 even when not
linewise */
    int inclusive; /* TRUE if char motion is inclusive (only
valid when motion_type is MCHAR */
    int end_adjusted; /* backuped b_op_end one char (only used by
do_format()) */
    pos_T start; /* start of the operator */
    pos_T end; /* end of the operator */
    pos_T cursor_start; /* cursor position before motion for "gw" */

    long line_count; /* number of lines from op_start to op_end
(inclusive) */
    int empty; /* op_start and op_end the same (only used by
do_change()) */
#ifdef FEAT_VISUAL
    int is_VIsual; /* operator on Visual area */
    int block_mode; /* current operator is Visual block mode */
#endif
    colnr_T start_vcol; /* start col for block mode operator */
    colnr_T end_vcol; /* end col for block mode operator */
#ifdef FEAT_AUTOCMD
    long prev_opcount; /* ca.opcount saved for K_CURSORHOLD */
    long prev_count0; /* ca.count0 saved for K_CURSORHOLD */
#endif
} oparg_T;

/*
* Arguments for Normal mode commands.
*/
typedef struct cmdarg_S
{
    oparg_T *oap; /* Operator arguments */
    int prechar; /* prefix character (optional, always 'g') */
    int cmdchar; /* command character */
    int nchar; /* next command character (optional) */
#ifdef FEAT_MBYTE
    int ncharC1; /* first composing character (optional) */
    int ncharC2; /* second composing character (optional) */
#endif
    int extra_char; /* yet another character (optional) */
    long opcount; /* count before an operator */
    long count0; /* count before command, default 0 */
    long count1; /* count before command, default 1 */
    int arg; /* extra argument from nv_cmds[] */
    int retval; /* return: CA_* values */
    char_u *searchbuf; /* return: pointer to search pattern or NULL */
} cmdarg_T;

/* values for retval: */
#define CA_COMMAND_BUSY 1 /* skip restarting edit() once */
#define CA_NO_ADJ_OP_END 2 /* don't adjust operator end */

#ifdef CURSOR_SHAPE
/*
* struct to store values from 'guicursor' and 'mouseshape'
*/
/* Indexes in shape_table[] */
#define SHAPE_IDX_N 0 /* Normal mode */
#define SHAPE_IDX_V 1 /* Visual mode */
#define SHAPE_IDX_I 2 /* Insert mode */
#define SHAPE_IDX_R 3 /* Replace mode */
#define SHAPE_IDX_C 4 /* Command line Normal mode */
#define SHAPE_IDX_CI 5 /* Command line Insert mode */
#define SHAPE_IDX_CR 6 /* Command line Replace mode */
#define SHAPE_IDX_O 7 /* Operator-pending mode */
#define SHAPE_IDX_VE 8 /* Visual mode with 'selection' exclusive */
#define SHAPE_IDX_CLINE 9 /* On command line */
#define SHAPE_IDX_STATUS 10 /* A status line */
#define SHAPE_IDX_SDRAG 11 /* dragging a status line */
#define SHAPE_IDX_VSEP 12 /* A vertical separator line */
#define SHAPE_IDX_VDRAG 13 /* dragging a vertical separator line */
#define SHAPE_IDX_MORE 14 /* Hit-return or More */
#define SHAPE_IDX_MOREL 15 /* Hit-return or More in last line */
#define SHAPE_IDX_SM 16 /* showing matching paren */
#define SHAPE_IDX_COUNT 17

#define SHAPE_BLOCK 0 /* block cursor */
#define SHAPE_HOR 1 /* horizontal bar cursor */
#define SHAPE_VER 2 /* vertical bar cursor */

#define MSHAPE_NUMBERED 1000 /* offset for shapes identified by number */
#define MSHAPE_HIDE 1 /* hide mouse pointer */

#define SHAPE_MOUSE 1 /* used for mouse pointer shape */
#define SHAPE_CURSOR 2 /* used for text cursor shape */

typedef struct cursor_entry
{
    int shape; /* one of the SHAPE_ defines */
    int mshape; /* one of the MSHAPE defines */
    int percentage; /* percentage of cell for bar */
    long blinkwait; /* blinking, wait time before blinking starts */
    long blinkon; /* blinking, on time */
    long blinkoff; /* blinking, off time */
    int id; /* highlight group ID */
    int id_lm; /* highlight group ID for :lmap mode */
    char *name; /* mode name (fixed) */
    char used_for; /* SHAPE_MOUSE and/or SHAPE_CURSOR */
} cursorentry_T;
#endif /* CURSOR_SHAPE */

#ifdef FEAT_MENU

/* Indices into vimmenu_T->strings[] and vimmenu_T->noremap[] for each mode */
#define MENU_INDEX_INVALID -1
#define MENU_INDEX_NORMAL 0
#define MENU_INDEX_VISUAL 1
#define MENU_INDEX_SELECT 2
#define MENU_INDEX_OP_PENDING 3
#define MENU_INDEX_INSERT 4
#define MENU_INDEX_CMDLINE 5
#define MENU_INDEX_TIP 6
#define MENU_MODES 7

/* Menu modes */
#define MENU_NORMAL_MODE (1 << MENU_INDEX_NORMAL)
#define MENU_VISUAL_MODE (1 << MENU_INDEX_VISUAL)
#define MENU_SELECT_MODE (1 << MENU_INDEX_SELECT)
#define MENU_OP_PENDING_MODE (1 << MENU_INDEX_OP_PENDING)
#define MENU_INSERT_MODE (1 << MENU_INDEX_INSERT)
#define MENU_CMDLINE_MODE (1 << MENU_INDEX_CMDLINE)
#define MENU_TIP_MODE (1 << MENU_INDEX_TIP)
#define MENU_ALL_MODES ((1 << MENU_INDEX_TIP) - 1)
/*note MENU_INDEX_TIP is not a 'real' mode*/

/* Start a menu name with this to not include it on the main menu bar */
#define MNU_HIDDEN_CHAR ']'

typedef struct VimMenu vimmenu_T;

struct VimMenu
{
    int modes; /* Which modes is this menu visible for? */
    int enabled; /* for which modes the menu is enabled */
    char_u *name; /* Name of menu, possibly translated */
    char_u *dname; /* Displayed Name ("name" without '&') */
#ifdef FEAT_MULTI_LANG
    char_u *en_name; /* "name" untranslated, NULL when "name"
* was not translated */
    char_u *en_dname; /* "dname" untranslated, NULL when "dname"
* was not translated */
#endif
    int mnemonic; /* mnemonic key (after '&') */
    char_u *actext; /* accelerator text (after TAB) */
    int priority; /* Menu order priority */
#ifdef FEAT_GUI
    void (*cb) __ARGS((vimmenu_T *)); /* Call-back routine */
#endif
#ifdef FEAT_TOOLBAR
    char_u *iconfile; /* name of file for icon or NULL */
    int iconidx; /* icon index (-1 if not set) */
    int icon_builtin; /* icon names is BuiltIn{nr} */
#endif
    char_u *strings[MENU_MODES]; /* Mapped string for each mode */
    int noremap[MENU_MODES]; /* A REMAP_ flag for each mode */
    char silent[MENU_MODES]; /* A silent flag for each mode */
    vimmenu_T *children; /* Children of sub-menu */
    vimmenu_T *parent; /* Parent of menu */
    vimmenu_T *next; /* Next item in menu */
#ifdef FEAT_GUI_X11
    Widget id; /* Manage this to enable item */
    Widget submenu_id; /* If this is submenu, add children here */
#endif
#ifdef FEAT_GUI_GTK
    GtkWidget *id; /* Manage this to enable item */
    GtkWidget *submenu_id; /* If this is submenu, add children here */
    GtkWidget *tearoff_handle;
    GtkWidget *label; /* Used by "set wak=" code. */
#endif
#ifdef FEAT_GUI_MOTIF
    int sensitive; /* turn button on/off */
    char **xpm; /* pixmap data */
    char *xpm_fname; /* file with pixmap data */
#endif
#ifdef FEAT_GUI_ATHENA
    Pixmap image; /* Toolbar image */
#endif
#ifdef FEAT_BEVAL_TIP
    BalloonEval *tip; /* tooltip for this menu item */
#endif
#ifdef FEAT_GUI_W16
    UINT id; /* Id of menu item */
    HMENU submenu_id; /* If this is submenu, add children here */
#endif
#ifdef FEAT_GUI_W32
    UINT id; /* Id of menu item */
    HMENU submenu_id; /* If this is submenu, add children here */
    HWND tearoff_handle; /* hWnd of tearoff if created */
#endif
#ifdef FEAT_GUI_MAC
/* MenuHandle id; */
/* short index; */ /* the item index within the father menu */
    short menu_id; /* the menu id to which this item belong */
    short submenu_id; /* the menu id of the children (could be
get through some tricks) */
    MenuHandle menu_handle;
    MenuHandle submenu_handle;
#endif
#ifdef FEAT_GUI_PHOTON
    PtWidget_t *id;
    PtWidget_t *submenu_id;
#endif
#ifdef FEAT_GUI_MACVIM
    char_u *mac_action; /* Action this menu sends */
    int mac_key; /* Key equivalent */
    int mac_mods; /* Modifier flags for the above */
    int mac_alternate; /* Item is alternate of previous item */
    int was_grey; /* Remember last 'grey' state */
#endif
};
#else
/* For generating prototypes when FEAT_MENU isn't defined. */
typedef int vimmenu_T;

#endif /* FEAT_MENU */

/*
* Struct to save values in before executing autocommands for a buffer that is
* not the current buffer. Without FEAT_AUTOCMD only "curbuf" is remembered.
*/
typedef struct
{
    buf_T *save_curbuf; /* saved curbuf */
#ifdef FEAT_AUTOCMD
    int use_aucmd_win; /* using aucmd_win */
    win_T *save_curwin; /* saved curwin */
    win_T *new_curwin; /* new curwin */
    buf_T *new_curbuf; /* new curbuf */
    char_u *globaldir; /* saved value of globaldir */
#endif
} aco_save_T;

/*
* Generic option table item, only used for printer at the moment.
*/
typedef struct
{
    const char *name;
    int hasnum;
    long number;
    char_u *string; /* points into option string */
    int strlen;
    int present;
} option_table_T;

/*
* Structure to hold printing color and font attributes.
*/
typedef struct
{
    long_u fg_color;
    long_u bg_color;
    int bold;
    int italic;
    int underline;
    int undercurl;
} prt_text_attr_T;

/*
* Structure passed back to the generic printer code.
*/
typedef struct
{
    int n_collated_copies;
    int n_uncollated_copies;
    int duplex;
    int chars_per_line;
    int lines_per_page;
    int has_color;
    prt_text_attr_T number;
#ifdef FEAT_SYN_HL
    int modec;
    int do_syntax;
#endif
    int user_abort;
    char_u *jobname;
#ifdef FEAT_POSTSCRIPT
    char_u *outfile;
    char_u *arguments;
#endif
} prt_settings_T;

#define PRINT_NUMBER_WIDTH 8

/*
* Used for popup menu items.
*/
typedef struct
{
    char_u *pum_text; /* main menu text */
    char_u *pum_kind; /* extra kind text (may be truncated) */
    char_u *pum_extra; /* extra menu text (may be truncated) */
    char_u *pum_info; /* extra info */
} pumitem_T;

/*
* Structure used for get_tagfname().
*/
typedef struct
{
    char_u *tn_tags; /* value of 'tags' when starting */
    char_u *tn_np; /* current position in tn_tags */
    int tn_did_filefind_init;
    int tn_hf_idx;
    void *tn_search_ctx;
} tagname_T;

/*
* Array indexes used for cptext argument of ins_compl_add().
*/
#define CPT_ABBR 0 /* "abbr" */
#define CPT_MENU 1 /* "menu" */
#define CPT_KIND 2 /* "kind" */
#define CPT_INFO 3 /* "info" */
#define CPT_COUNT 4 /* Number of entries */

typedef struct {
  UINT32_T total[2];
  UINT32_T state[8];
  char_u buffer[64];
} context_sha256_T;
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