xref: /dragonfly/contrib/nvi2/common/cut.h (revision b1ac2ebb)
1 /*-
2  * Copyright (c) 1991, 1993, 1994
3  *	The Regents of the University of California.  All rights reserved.
4  * Copyright (c) 1991, 1993, 1994, 1995, 1996
5  *	Keith Bostic.  All rights reserved.
6  *
7  * See the LICENSE file for redistribution information.
8  */
9 
10 typedef struct _texth TEXTH;		/* TEXT list head structure. */
11 TAILQ_HEAD(_texth, _text);
12 
13 /* Cut buffers. */
14 struct _cb {
15 	SLIST_ENTRY(_cb) q;		/* Linked list of cut buffers. */
16 	TEXTH	 textq[1];		/* Linked list of TEXT structures. */
17 	/* XXXX Needed ? Can non ascii-chars be cut buffer names ? */
18 	CHAR_T	 name;			/* Cut buffer name. */
19 	size_t	 len;			/* Total length of cut text. */
20 
21 #define	CB_LMODE	0x01		/* Cut was in line mode. */
22 	u_int8_t flags;
23 };
24 
25 /* Lines/blocks of text. */
26 struct _text {				/* Text: a linked list of lines. */
27 	TAILQ_ENTRY(_text) q;		/* Linked list of text structures. */
28 	CHAR_T	*lb;			/* Line buffer. */
29 	size_t	 lb_len;		/* Line buffer length. */
30 	size_t	 len;			/* Line length. */
31 
32 	/* These fields are used by the vi text input routine. */
33 	recno_t	 lno;			/* 1-N: file line. */
34 
35 #define	ENTIRE_LINE	((size_t)-1)	/* cno: end of the line. */
36 	size_t	 cno;			/* 0-N: file character in line. */
37 	size_t	 ai;			/* 0-N: autoindent bytes. */
38 	size_t	 insert;		/* 0-N: bytes to insert (push). */
39 	size_t	 offset;		/* 0-N: initial, unerasable chars. */
40 	size_t	 owrite;		/* 0-N: chars to overwrite. */
41 	size_t	 R_erase;		/* 0-N: 'R' erase count. */
42 	size_t	 sv_cno;		/* 0-N: Saved line cursor. */
43 	size_t	 sv_len;		/* 0-N: Saved line length. */
44 
45 	/*
46 	 * These fields returns information from the vi text input routine.
47 	 *
48 	 * The termination condition.  Note, this field is only valid if the
49 	 * text input routine returns success.
50 	 *	TERM_BS:	User backspaced over the prompt.
51 	 *	TERM_CEDIT:	User entered <edit-char>.
52 	 *	TERM_CR:	User entered <carriage-return>; no data.
53 	 *	TERM_ESC:	User entered <escape>; no data.
54 	 *	TERM_OK:	Data available.
55 	 *	TERM_SEARCH:	Incremental search.
56 	 */
57 	enum {
58 	    TERM_BS, TERM_CEDIT, TERM_CR, TERM_ESC, TERM_OK, TERM_SEARCH
59 	} term;
60 };
61 
62 /*
63  * Get named buffer 'name'.
64  * Translate upper-case buffer names to lower-case buffer names.
65  */
66 #define	CBNAME(sp, cbp, nch) {						\
67 	CHAR_T L__name;							\
68 	L__name = isupper(nch) ? tolower(nch) : (nch);			\
69 	SLIST_FOREACH(cbp, sp->gp->cutq, q)				\
70 		if (cbp->name == L__name)				\
71 			break;						\
72 }
73 
74 /* Flags to the cut() routine. */
75 #define	CUT_LINEMODE	0x01		/* Cut in line mode. */
76 #define	CUT_NUMOPT	0x02		/* Numeric buffer: optional. */
77 #define	CUT_NUMREQ	0x04		/* Numeric buffer: required. */
78