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