1 /*- 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. 6 * 7 * See the LICENSE file for redistribution information. 8 */ 9 10 #include "config.h" 11 12 #ifndef lint 13 static const char sccsid[] = "@(#)v_right.c 10.7 (Berkeley) 3/6/96"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <limits.h> 22 #include <stdio.h> 23 24 #include "../common/common.h" 25 #include "vi.h" 26 27 /* 28 * v_right -- [count]' ', [count]l 29 * Move right by columns. 30 * 31 * PUBLIC: int v_right __P((SCR *, VICMD *)); 32 */ 33 int 34 v_right(sp, vp) 35 SCR *sp; 36 VICMD *vp; 37 { 38 size_t len; 39 int isempty; 40 41 if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) { 42 if (isempty) 43 goto eol; 44 return (1); 45 } 46 47 /* It's always illegal to move right on empty lines. */ 48 if (len == 0) { 49 eol: v_eol(sp, NULL); 50 return (1); 51 } 52 53 /* 54 * Non-motion commands move to the end of the range. Delete and 55 * yank stay at the start. Ignore others. Adjust the end of the 56 * range for motion commands. 57 * 58 * !!! 59 * Historically, "[cdsy]l" worked at the end of a line. Also, 60 * EOL is a count sink. 61 */ 62 vp->m_stop.cno = vp->m_start.cno + 63 (F_ISSET(vp, VC_C1SET) ? vp->count : 1); 64 if (vp->m_start.cno == len - 1 && !ISMOTION(vp)) { 65 v_eol(sp, NULL); 66 return (1); 67 } 68 if (vp->m_stop.cno >= len) { 69 vp->m_stop.cno = len - 1; 70 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop; 71 } else if (ISMOTION(vp)) { 72 --vp->m_stop.cno; 73 vp->m_final = vp->m_start; 74 } else 75 vp->m_final = vp->m_stop; 76 return (0); 77 } 78 79 /* 80 * v_dollar -- [count]$ 81 * Move to the last column. 82 * 83 * PUBLIC: int v_dollar __P((SCR *, VICMD *)); 84 */ 85 int 86 v_dollar(sp, vp) 87 SCR *sp; 88 VICMD *vp; 89 { 90 size_t len; 91 int isempty; 92 93 /* 94 * !!! 95 * A count moves down count - 1 rows, so, "3$" is the same as "2j$". 96 */ 97 if ((F_ISSET(vp, VC_C1SET) ? vp->count : 1) != 1) { 98 /* 99 * !!! 100 * Historically, if the $ is a motion, and deleting from 101 * at or before the first non-blank of the line, it's a 102 * line motion, and the line motion flag is set. 103 */ 104 vp->m_stop.cno = 0; 105 if (nonblank(sp, vp->m_start.lno, &vp->m_stop.cno)) 106 return (1); 107 if (ISMOTION(vp) && vp->m_start.cno <= vp->m_stop.cno) 108 F_SET(vp, VM_LMODE); 109 110 --vp->count; 111 if (v_down(sp, vp)) 112 return (1); 113 } 114 115 /* 116 * !!! 117 * Historically, it was illegal to use $ as a motion command on 118 * an empty line. Unfortunately, even though C was historically 119 * aliased to c$, it (and not c$) was special cased to work on 120 * empty lines. Since we alias C to c$ too, we have a problem. 121 * To fix it, we let c$ go through, on the assumption that it's 122 * not a problem for it to work. 123 */ 124 if (db_eget(sp, vp->m_stop.lno, NULL, &len, &isempty)) { 125 if (!isempty) 126 return (1); 127 len = 0; 128 } 129 130 if (len == 0) { 131 if (ISMOTION(vp) && !ISCMD(vp->rkp, 'c')) { 132 v_eol(sp, NULL); 133 return (1); 134 } 135 return (0); 136 } 137 138 /* 139 * Non-motion commands move to the end of the range. Delete 140 * and yank stay at the start. Ignore others. 141 */ 142 vp->m_stop.cno = len ? len - 1 : 0; 143 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop; 144 return (0); 145 } 146