2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1992, 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid[] = "$Id: v_match.c,v 10.11 2012/02/11 00:33:46 zy Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
27 #include "../common/common.h"
32 * Search to matching character.
34 * PUBLIC: int v_match(SCR *, VICMD *);
37 v_match(SCR *sp, VICMD *vp)
42 int cnt, isempty, matchc, startc, (*gc)(SCR *, VCS *);
45 const CHAR_T *match_chars;
48 * Historically vi would match (), {} and [] however
49 * an update included <>. This is ok for editing HTML
50 * but a pain in the butt for C source.
51 * Making it an option lets the user decide what is 'right'.
53 match_chars = VIP(sp)->mcs;
57 * Historic practice; ignore the count.
60 * Historical practice was to search for the initial character in the
61 * forward direction only.
63 if (db_eget(sp, vp->m_start.lno, &p, &len, &isempty)) {
68 for (off = vp->m_start.cno;; ++off) {
70 nomatch: msgq(sp, M_BERR, "184|No match character on this line");
74 cp = STRCHR(match_chars, startc);
76 cnt = cp - match_chars;
77 matchc = match_chars[cnt ^ 1];
78 gc = cnt & 1 ? cs_prev : cs_next;
83 cs.cs_lno = vp->m_start.lno;
90 if (cs.cs_flags != 0) {
91 if (cs.cs_flags == CS_EOF || cs.cs_flags == CS_SOF)
95 if (cs.cs_ch == startc)
97 else if (cs.cs_ch == matchc && --cnt == 0)
101 msgq(sp, M_BERR, "185|Matching character not found");
105 vp->m_stop.lno = cs.cs_lno;
106 vp->m_stop.cno = cs.cs_cno;
109 * If moving right, non-motion commands move to the end of the range.
110 * Delete and yank stay at the start.
112 * If moving left, all commands move to the end of the range.
115 * Don't correct for leftward movement -- historic vi deleted the
116 * starting cursor position when deleting to a match.
118 if (vp->m_start.lno < vp->m_stop.lno ||
119 (vp->m_start.lno == vp->m_stop.lno &&
120 vp->m_start.cno < vp->m_stop.cno))
121 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop;
123 vp->m_final = vp->m_stop;
127 * If the motion is across lines, and the earliest cursor position
128 * is at or before any non-blank characters in the line, i.e. the
129 * movement is cutting all of the line's text, and the later cursor
130 * position has nothing other than whitespace characters between it
131 * and the end of its line, the buffer is in line mode.
133 if (!ISMOTION(vp) || vp->m_start.lno == vp->m_stop.lno)
135 mp = vp->m_start.lno < vp->m_stop.lno ? &vp->m_start : &vp->m_stop;
138 if (nonblank(sp, mp->lno, &cno))
143 mp = vp->m_start.lno < vp->m_stop.lno ? &vp->m_stop : &vp->m_start;
144 if (db_get(sp, mp->lno, DBG_FATAL, &p, &len))
146 for (p += mp->cno + 1, len -= mp->cno; --len; ++p)
155 * Build the match character list.
157 * PUBLIC: int v_buildmcs(SCR *, char *);
160 v_buildmcs(SCR *sp, char *str)
162 CHAR_T **mp = &VIP(sp)->mcs;
163 size_t len = strlen(str) + 1;
167 MALLOC(sp, *mp, CHAR_T *, len * sizeof(CHAR_T));
171 if (mbstowcs(*mp, str, len) == (size_t)-1)
174 memcpy(*mp, str, len);