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: put.c,v 10.19 04/07/11 17:00:24 zy 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 <ctype.h> 22 #include <limits.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 #include "common.h" 28 29 /* 30 * put -- 31 * Put text buffer contents into the file. 32 * 33 * PUBLIC: int put __P((SCR *, CB *, CHAR_T *, MARK *, MARK *, int)); 34 */ 35 int 36 put( 37 SCR *sp, 38 CB *cbp, 39 CHAR_T *namep, 40 MARK *cp, 41 MARK *rp, 42 int append) 43 { 44 CHAR_T name; 45 TEXT *ltp, *tp; 46 recno_t lno; 47 size_t blen, clen, len; 48 int rval; 49 CHAR_T *bp, *t; 50 CHAR_T *p; 51 52 if (cbp == NULL) 53 if (namep == NULL) { 54 cbp = sp->gp->dcbp; 55 if (cbp == NULL) { 56 msgq(sp, M_ERR, 57 "053|The default buffer is empty"); 58 return (1); 59 } 60 } else { 61 name = *namep; 62 CBNAME(sp, cbp, name); 63 if (cbp == NULL) { 64 msgq(sp, M_ERR, "054|Buffer %s is empty", 65 KEY_NAME(sp, name)); 66 return (1); 67 } 68 } 69 tp = TAILQ_FIRST(cbp->textq); 70 71 /* 72 * It's possible to do a put into an empty file, meaning that the cut 73 * buffer simply becomes the file. It's a special case so that we can 74 * ignore it in general. 75 * 76 * !!! 77 * Historically, pasting into a file with no lines in vi would preserve 78 * the single blank line. This is surely a result of the fact that the 79 * historic vi couldn't deal with a file that had no lines in it. This 80 * implementation treats that as a bug, and does not retain the blank 81 * line. 82 * 83 * Historical practice is that the cursor ends at the first character 84 * in the file. 85 */ 86 if (cp->lno == 1) { 87 if (db_last(sp, &lno)) 88 return (1); 89 if (lno == 0) { 90 for (; tp != NULL; 91 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q)) 92 if (db_append(sp, 1, lno, tp->lb, tp->len)) 93 return (1); 94 rp->lno = 1; 95 rp->cno = 0; 96 return (0); 97 } 98 } 99 100 /* If a line mode buffer, append each new line into the file. */ 101 if (F_ISSET(cbp, CB_LMODE)) { 102 lno = append ? cp->lno : cp->lno - 1; 103 rp->lno = lno + 1; 104 for (; tp != NULL; 105 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q)) 106 if (db_append(sp, 1, lno, tp->lb, tp->len)) 107 return (1); 108 rp->cno = 0; 109 (void)nonblank(sp, rp->lno, &rp->cno); 110 return (0); 111 } 112 113 /* 114 * If buffer was cut in character mode, replace the current line with 115 * one built from the portion of the first line to the left of the 116 * split plus the first line in the CB. Append each intermediate line 117 * in the CB. Append a line built from the portion of the first line 118 * to the right of the split plus the last line in the CB. 119 * 120 * Get the first line. 121 */ 122 lno = cp->lno; 123 if (db_get(sp, lno, DBG_FATAL, &p, &len)) 124 return (1); 125 126 GET_SPACE_RETW(sp, bp, blen, tp->len + len + 1); 127 t = bp; 128 129 /* Original line, left of the split. */ 130 if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) { 131 MEMCPY(bp, p, clen); 132 p += clen; 133 t += clen; 134 } 135 136 /* First line from the CB. */ 137 if (tp->len != 0) { 138 MEMCPY(t, tp->lb, tp->len); 139 t += tp->len; 140 } 141 142 /* Calculate length left in the original line. */ 143 clen = len == 0 ? 0 : len - (cp->cno + (append ? 1 : 0)); 144 145 /* 146 * !!! 147 * In the historical 4BSD version of vi, character mode puts within 148 * a single line have two cursor behaviors: if the put is from the 149 * unnamed buffer, the cursor moves to the character inserted which 150 * appears last in the file. If the put is from a named buffer, 151 * the cursor moves to the character inserted which appears first 152 * in the file. In System III/V, it was changed at some point and 153 * the cursor always moves to the first character. In both versions 154 * of vi, character mode puts that cross line boundaries leave the 155 * cursor on the first character. Nvi implements the System III/V 156 * behavior, and expect POSIX.2 to do so as well. 157 */ 158 rp->lno = lno; 159 rp->cno = len == 0 ? 0 : sp->cno + (append && tp->len ? 1 : 0); 160 161 /* 162 * If no more lines in the CB, append the rest of the original 163 * line and quit. Otherwise, build the last line before doing 164 * the intermediate lines, because the line changes will lose 165 * the cached line. 166 */ 167 if (TAILQ_NEXT(tp, q) == NULL) { 168 if (clen > 0) { 169 MEMCPY(t, p, clen); 170 t += clen; 171 } 172 if (db_set(sp, lno, bp, t - bp)) 173 goto err; 174 if (sp->rptlchange != lno) { 175 sp->rptlchange = lno; 176 ++sp->rptlines[L_CHANGED]; 177 } 178 } else { 179 /* 180 * Have to build both the first and last lines of the 181 * put before doing any sets or we'll lose the cached 182 * line. Build both the first and last lines in the 183 * same buffer, so we don't have to have another buffer 184 * floating around. 185 * 186 * Last part of original line; check for space, reset 187 * the pointer into the buffer. 188 */ 189 ltp = TAILQ_LAST(cbp->textq, _texth); 190 len = t - bp; 191 ADD_SPACE_RETW(sp, bp, blen, ltp->len + clen); 192 t = bp + len; 193 194 /* Add in last part of the CB. */ 195 MEMCPY(t, ltp->lb, ltp->len); 196 if (clen) 197 MEMCPY(t + ltp->len, p, clen); 198 clen += ltp->len; 199 200 /* 201 * Now: bp points to the first character of the first 202 * line, t points to the last character of the last 203 * line, t - bp is the length of the first line, and 204 * clen is the length of the last. Just figured you'd 205 * want to know. 206 * 207 * Output the line replacing the original line. 208 */ 209 if (db_set(sp, lno, bp, t - bp)) 210 goto err; 211 if (sp->rptlchange != lno) { 212 sp->rptlchange = lno; 213 ++sp->rptlines[L_CHANGED]; 214 } 215 216 /* Output any intermediate lines in the CB. */ 217 for (tp = TAILQ_NEXT(tp, q); TAILQ_NEXT(tp, q) != NULL; 218 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q)) 219 if (db_append(sp, 1, lno, tp->lb, tp->len)) 220 goto err; 221 222 if (db_append(sp, 1, lno, t, clen)) 223 goto err; 224 ++sp->rptlines[L_ADDED]; 225 } 226 rval = 0; 227 228 if (0) 229 err: rval = 1; 230 231 FREE_SPACEW(sp, bp, blen); 232 return (rval); 233 } 234