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[] = "$Id: v_right.c,v 10.8 2001/06/25 15:19:34 skimo Exp $"; 14 #endif /* not lint */ 15 16 #include <sys/types.h> 17 #include <sys/queue.h> 18 #include <sys/time.h> 19 20 #include <bitstring.h> 21 #include <limits.h> 22 #include <stdio.h> 23 24 #include "../common/common.h" 25 #include "vi.h" 26 27 /* 28 * v_right -- [count]' ', [count]l 29 * Move right by columns. 30 * 31 * PUBLIC: int v_right __P((SCR *, VICMD *)); 32 */ 33 int 34 v_right(SCR *sp, VICMD *vp) 35 { 36 size_t len; 37 int isempty; 38 39 if (db_eget(sp, vp->m_start.lno, NULL, &len, &isempty)) { 40 if (isempty) 41 goto eol; 42 return (1); 43 } 44 45 /* It's always illegal to move right on empty lines. */ 46 if (len == 0) { 47 eol: v_eol(sp, NULL); 48 return (1); 49 } 50 51 /* 52 * Non-motion commands move to the end of the range. Delete and 53 * yank stay at the start. Ignore others. Adjust the end of the 54 * range for motion commands. 55 * 56 * !!! 57 * Historically, "[cdsy]l" worked at the end of a line. Also, 58 * EOL is a count sink. 59 */ 60 vp->m_stop.cno = vp->m_start.cno + 61 (F_ISSET(vp, VC_C1SET) ? vp->count : 1); 62 if (vp->m_start.cno == len - 1 && !ISMOTION(vp)) { 63 v_eol(sp, NULL); 64 return (1); 65 } 66 if (vp->m_stop.cno >= len) { 67 vp->m_stop.cno = len - 1; 68 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop; 69 } else if (ISMOTION(vp)) { 70 --vp->m_stop.cno; 71 vp->m_final = vp->m_start; 72 } else 73 vp->m_final = vp->m_stop; 74 return (0); 75 } 76 77 /* 78 * v_dollar -- [count]$ 79 * Move to the last column. 80 * 81 * PUBLIC: int v_dollar __P((SCR *, VICMD *)); 82 */ 83 int 84 v_dollar(SCR *sp, VICMD *vp) 85 { 86 size_t len; 87 int isempty; 88 89 /* 90 * !!! 91 * A count moves down count - 1 rows, so, "3$" is the same as "2j$". 92 */ 93 if ((F_ISSET(vp, VC_C1SET) ? vp->count : 1) != 1) { 94 /* 95 * !!! 96 * Historically, if the $ is a motion, and deleting from 97 * at or before the first non-blank of the line, it's a 98 * line motion, and the line motion flag is set. 99 */ 100 vp->m_stop.cno = 0; 101 if (nonblank(sp, vp->m_start.lno, &vp->m_stop.cno)) 102 return (1); 103 if (ISMOTION(vp) && vp->m_start.cno <= vp->m_stop.cno) 104 F_SET(vp, VM_LMODE); 105 106 --vp->count; 107 if (v_down(sp, vp)) 108 return (1); 109 } 110 111 /* 112 * !!! 113 * Historically, it was illegal to use $ as a motion command on 114 * an empty line. Unfortunately, even though C was historically 115 * aliased to c$, it (and not c$) was special cased to work on 116 * empty lines. Since we alias C to c$ too, we have a problem. 117 * To fix it, we let c$ go through, on the assumption that it's 118 * not a problem for it to work. 119 */ 120 if (db_eget(sp, vp->m_stop.lno, NULL, &len, &isempty)) { 121 if (!isempty) 122 return (1); 123 len = 0; 124 } 125 126 if (len == 0) { 127 if (ISMOTION(vp) && !ISCMD(vp->rkp, 'c')) { 128 v_eol(sp, NULL); 129 return (1); 130 } 131 return (0); 132 } 133 134 /* 135 * Non-motion commands move to the end of the range. Delete 136 * and yank stay at the start. Ignore others. 137 */ 138 vp->m_stop.cno = len ? len - 1 : 0; 139 vp->m_final = ISMOTION(vp) ? vp->m_start : vp->m_stop; 140 return (0); 141 } 142