1 /* $NetBSD: v_ulcase.c,v 1.3 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3 * Copyright (c) 1992, 1993, 1994
4 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 * Keith Bostic. All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11 #include "config.h"
12
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: v_ulcase.c,v 10.11 2001/06/25 15:19:36 skimo Exp (Berkeley) Date: 2001/06/25 15:19:36 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: v_ulcase.c,v 1.3 2014/01/26 21:43:45 christos Exp $");
20 #endif
21
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/time.h>
25
26 #include <bitstring.h>
27 #include <ctype.h>
28 #include <errno.h>
29 #include <limits.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include "../common/common.h"
35 #include "vi.h"
36
37 static int ulcase __P((SCR *, db_recno_t, CHAR_T *, size_t, size_t, size_t));
38
39 /*
40 * v_ulcase -- [count]~
41 * Toggle upper & lower case letters.
42 *
43 * !!!
44 * Historic vi didn't permit ~ to cross newline boundaries. I can
45 * think of no reason why it shouldn't, which at least lets the user
46 * auto-repeat through a paragraph.
47 *
48 * !!!
49 * In historic vi, the count was ignored. It would have been better
50 * if there had been an associated motion, but it's too late to make
51 * that the default now.
52 *
53 * PUBLIC: int v_ulcase __P((SCR *, VICMD *));
54 */
55 int
v_ulcase(SCR * sp,VICMD * vp)56 v_ulcase(SCR *sp, VICMD *vp)
57 {
58 db_recno_t lno;
59 size_t cno, lcnt, len;
60 u_long cnt;
61 CHAR_T *p;
62
63 lno = vp->m_start.lno;
64 cno = vp->m_start.cno;
65
66 for (cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt > 0; cno = 0) {
67 /* SOF is an error, EOF is an infinite count sink. */
68 if (db_get(sp, lno, 0, &p, &len)) {
69 if (lno == 1) {
70 v_emsg(sp, NULL, VIM_EMPTY);
71 return (1);
72 }
73 --lno;
74 break;
75 }
76
77 /* Empty lines decrement the count by one. */
78 if (len == 0) {
79 --cnt;
80 vp->m_final.cno = 0;
81 continue;
82 }
83
84 if (cno + cnt >= len) {
85 lcnt = len - 1;
86 cnt -= len - cno;
87
88 vp->m_final.cno = len - 1;
89 } else {
90 lcnt = cno + cnt - 1;
91 cnt = 0;
92
93 vp->m_final.cno = lcnt + 1;
94 }
95
96 if (ulcase(sp, lno, p, len, cno, lcnt))
97 return (1);
98
99 if (cnt > 0)
100 ++lno;
101 }
102
103 vp->m_final.lno = lno;
104 return (0);
105 }
106
107 /*
108 * v_mulcase -- [count]~[count]motion
109 * Toggle upper & lower case letters over a range.
110 *
111 * PUBLIC: int v_mulcase __P((SCR *, VICMD *));
112 */
113 int
v_mulcase(SCR * sp,VICMD * vp)114 v_mulcase(SCR *sp, VICMD *vp)
115 {
116 CHAR_T *p;
117 size_t len;
118 db_recno_t lno;
119
120 for (lno = vp->m_start.lno;;) {
121 if (db_get(sp, lno, DBG_FATAL, &p, &len))
122 return (1);
123 if (len != 0 && ulcase(sp, lno, p, len,
124 lno == vp->m_start.lno ? vp->m_start.cno : 0,
125 !F_ISSET(vp, VM_LMODE) &&
126 lno == vp->m_stop.lno ? vp->m_stop.cno : len))
127 return (1);
128
129 if (++lno > vp->m_stop.lno)
130 break;
131 }
132
133 /*
134 * XXX
135 * I didn't create a new motion command when I added motion semantics
136 * for ~. While that's the correct way to do it, that choice would
137 * have required changes all over the vi directory for little gain.
138 * Instead, we pretend it's a yank command. Note, this means that we
139 * follow the cursor motion rules for yank commands, but that seems
140 * reasonable to me.
141 */
142 return (0);
143 }
144
145 /*
146 * ulcase --
147 * Change part of a line's case.
148 */
149 static int
ulcase(SCR * sp,db_recno_t lno,CHAR_T * lp,size_t len,size_t scno,size_t ecno)150 ulcase(SCR *sp, db_recno_t lno, CHAR_T *lp, size_t len, size_t scno, size_t ecno)
151 {
152 size_t blen;
153 int change, rval;
154 ARG_CHAR_T ch;
155 CHAR_T *p, *t, *bp;
156
157 GET_SPACE_RETW(sp, bp, blen, len);
158 MEMMOVEW(bp, lp, len);
159
160 change = rval = 0;
161 for (p = bp + scno, t = bp + ecno + 1; p < t; ++p) {
162 ch = (UCHAR_T)*p;
163 if (ISLOWER(ch)) {
164 *p = TOUPPER(ch);
165 change = 1;
166 } else if (ISUPPER(ch)) {
167 *p = TOLOWER(ch);
168 change = 1;
169 }
170 }
171
172 if (change && db_set(sp, lno, bp, len))
173 rval = 1;
174
175 FREE_SPACEW(sp, bp, blen);
176 return (rval);
177 }
178