1 /* $NetBSD: v_left.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_left.c,v 10.9 2001/06/25 15:19:32 skimo Exp (Berkeley) Date: 2001/06/25 15:19:32 "; 17 #endif /* not lint */ 18 #else 19 __RCSID("$NetBSD: v_left.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 <limits.h> 28 #include <stdio.h> 29 30 #include "../common/common.h" 31 #include "vi.h" 32 33 /* 34 * v_left -- [count]^H, [count]h 35 * Move left by columns. 36 * 37 * PUBLIC: int v_left __P((SCR *, VICMD *)); 38 */ 39 int 40 v_left(SCR *sp, VICMD *vp) 41 { 42 db_recno_t cnt; 43 44 /* 45 * !!! 46 * The ^H and h commands always failed in the first column. 47 */ 48 if (vp->m_start.cno == 0) { 49 v_sol(sp); 50 return (1); 51 } 52 53 /* Find the end of the range. */ 54 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; 55 if (vp->m_start.cno > cnt) 56 vp->m_stop.cno = vp->m_start.cno - cnt; 57 else 58 vp->m_stop.cno = 0; 59 60 /* 61 * All commands move to the end of the range. Motion commands 62 * adjust the starting point to the character before the current 63 * one. 64 */ 65 if (ISMOTION(vp)) 66 --vp->m_start.cno; 67 vp->m_final = vp->m_stop; 68 return (0); 69 } 70 71 /* 72 * v_cfirst -- [count]_ 73 * Move to the first non-blank character in a line. 74 * 75 * PUBLIC: int v_cfirst __P((SCR *, VICMD *)); 76 */ 77 int 78 v_cfirst(SCR *sp, VICMD *vp) 79 { 80 db_recno_t cnt, lno; 81 82 /* 83 * !!! 84 * If the _ is a motion component, it makes the command a line motion 85 * e.g. "d_" deletes the line. It also means that the cursor doesn't 86 * move. 87 * 88 * The _ command never failed in the first column. 89 */ 90 if (ISMOTION(vp)) 91 F_SET(vp, VM_LMODE); 92 /* 93 * !!! 94 * Historically a specified count makes _ move down count - 1 95 * rows, so, "3_" is the same as "2j_". 96 */ 97 cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; 98 if (cnt != 1) { 99 --vp->count; 100 return (v_down(sp, vp)); 101 } 102 103 /* 104 * Move to the first non-blank. 105 * 106 * Can't just use RCM_SET_FNB, in case _ is used as the motion 107 * component of another command. 108 */ 109 vp->m_stop.cno = 0; 110 if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno)) 111 return (1); 112 113 /* 114 * !!! 115 * The _ command has to fail if the file is empty and we're doing 116 * a delete. If deleting line 1, and 0 is the first nonblank, 117 * make the check. 118 */ 119 if (vp->m_stop.lno == 1 && 120 vp->m_stop.cno == 0 && ISCMD(vp->rkp, 'd')) { 121 if (db_last(sp, &lno)) 122 return (1); 123 if (lno == 0) { 124 v_sol(sp); 125 return (1); 126 } 127 } 128 129 /* 130 * Delete and non-motion commands move to the end of the range, 131 * yank stays at the start. Ignore others. 132 */ 133 vp->m_final = 134 ISMOTION(vp) && ISCMD(vp->rkp, 'y') ? vp->m_start : vp->m_stop; 135 return (0); 136 } 137 138 /* 139 * v_first -- ^ 140 * Move to the first non-blank character in this line. 141 * 142 * PUBLIC: int v_first __P((SCR *, VICMD *)); 143 */ 144 int 145 v_first(SCR *sp, VICMD *vp) 146 { 147 /* 148 * !!! 149 * Yielding to none in our quest for compatibility with every 150 * historical blemish of vi, no matter how strange it might be, 151 * we permit the user to enter a count and then ignore it. 152 */ 153 154 /* 155 * Move to the first non-blank. 156 * 157 * Can't just use RCM_SET_FNB, in case ^ is used as the motion 158 * component of another command. 159 */ 160 vp->m_stop.cno = 0; 161 if (nonblank(sp, vp->m_stop.lno, &vp->m_stop.cno)) 162 return (1); 163 164 /* 165 * !!! 166 * The ^ command succeeded if used as a command when the cursor was 167 * on the first non-blank in the line, but failed if used as a motion 168 * component in the same situation. 169 */ 170 if (ISMOTION(vp) && vp->m_start.cno == vp->m_stop.cno) { 171 v_sol(sp); 172 return (1); 173 } 174 175 /* 176 * If moving right, non-motion commands move to the end of the range. 177 * Delete and yank stay at the start. Motion commands adjust the 178 * ending point to the character before the current ending charcter. 179 * 180 * If moving left, all commands move to the end of the range. Motion 181 * commands adjust the starting point to the character before the 182 * current starting character. 183 */ 184 if (vp->m_start.cno < vp->m_stop.cno) 185 if (ISMOTION(vp)) { 186 --vp->m_stop.cno; 187 vp->m_final = vp->m_start; 188 } else 189 vp->m_final = vp->m_stop; 190 else { 191 if (ISMOTION(vp)) 192 --vp->m_start.cno; 193 vp->m_final = vp->m_stop; 194 } 195 return (0); 196 } 197 198 /* 199 * v_ncol -- [count]| 200 * Move to column count or the first column on this line. If the 201 * requested column is past EOL, move to EOL. The nasty part is 202 * that we have to know character column widths to make this work. 203 * 204 * PUBLIC: int v_ncol __P((SCR *, VICMD *)); 205 */ 206 int 207 v_ncol(SCR *sp, VICMD *vp) 208 { 209 if (F_ISSET(vp, VC_C1SET) && vp->count > 1) { 210 --vp->count; 211 vp->m_stop.cno = 212 vs_colpos(sp, vp->m_start.lno, (size_t)vp->count); 213 /* 214 * !!! 215 * The | command succeeded if used as a command and the cursor 216 * didn't move, but failed if used as a motion component in the 217 * same situation. 218 */ 219 if (ISMOTION(vp) && vp->m_stop.cno == vp->m_start.cno) { 220 v_nomove(sp); 221 return (1); 222 } 223 } else { 224 /* 225 * !!! 226 * The | command succeeded if used as a command in column 0 227 * without a count, but failed if used as a motion component 228 * in the same situation. 229 */ 230 if (ISMOTION(vp) && vp->m_start.cno == 0) { 231 v_sol(sp); 232 return (1); 233 } 234 vp->m_stop.cno = 0; 235 } 236 237 /* 238 * If moving right, non-motion commands move to the end of the range. 239 * Delete and yank stay at the start. Motion commands adjust the 240 * ending point to the character before the current ending charcter. 241 * 242 * If moving left, all commands move to the end of the range. Motion 243 * commands adjust the starting point to the character before the 244 * current starting character. 245 */ 246 if (vp->m_start.cno < vp->m_stop.cno) 247 if (ISMOTION(vp)) { 248 --vp->m_stop.cno; 249 vp->m_final = vp->m_start; 250 } else 251 vp->m_final = vp->m_stop; 252 else { 253 if (ISMOTION(vp)) 254 --vp->m_start.cno; 255 vp->m_final = vp->m_stop; 256 } 257 return (0); 258 } 259 260 /* 261 * v_zero -- 0 262 * Move to the first column on this line. 263 * 264 * PUBLIC: int v_zero __P((SCR *, VICMD *)); 265 */ 266 int 267 v_zero(SCR *sp, VICMD *vp) 268 { 269 /* 270 * !!! 271 * The 0 command succeeded if used as a command in the first column 272 * but failed if used as a motion component in the same situation. 273 */ 274 if (ISMOTION(vp) && vp->m_start.cno == 0) { 275 v_sol(sp); 276 return (1); 277 } 278 279 /* 280 * All commands move to the end of the range. Motion commands 281 * adjust the starting point to the character before the current 282 * one. 283 */ 284 vp->m_stop.cno = 0; 285 if (ISMOTION(vp)) 286 --vp->m_start.cno; 287 vp->m_final = vp->m_stop; 288 return (0); 289 } 290
Indexes created Thu Oct 08 00:26:19 UTC 2026