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 <ctype.h> 18 #include <limits.h> 19 #include <stdio.h> 20 #include <stdlib.h> 21 #include <string.h> 22 23 #include "common.h" 24 25 /* 26 * put -- 27 * Put text buffer contents into the file. 28 * 29 * PUBLIC: int put(SCR *, CB *, CHAR_T *, MARK *, MARK *, int); 30 */ 31 int 32 put(SCR *sp, CB *cbp, CHAR_T *namep, MARK *cp, MARK *rp, int append) 33 { 34 CHAR_T name; 35 TEXT *ltp, *tp; 36 recno_t lno; 37 size_t blen, clen, len; 38 int rval; 39 CHAR_T *bp, *t; 40 CHAR_T *p; 41 42 if (cbp == NULL) { 43 if (namep == NULL) { 44 cbp = sp->gp->dcbp; 45 if (cbp == NULL) { 46 msgq(sp, M_ERR, 47 "053|The default buffer is empty"); 48 return (1); 49 } 50 } else { 51 name = *namep; 52 CBNAME(sp, cbp, name); 53 if (cbp == NULL) { 54 msgq(sp, M_ERR, "054|Buffer %s is empty", 55 KEY_NAME(sp, name)); 56 return (1); 57 } 58 } 59 } 60 tp = TAILQ_FIRST(cbp->textq); 61 62 /* 63 * It's possible to do a put into an empty file, meaning that the cut 64 * buffer simply becomes the file. It's a special case so that we can 65 * ignore it in general. 66 * 67 * !!! 68 * Historically, pasting into a file with no lines in vi would preserve 69 * the single blank line. This is surely a result of the fact that the 70 * historic vi couldn't deal with a file that had no lines in it. This 71 * implementation treats that as a bug, and does not retain the blank 72 * line. 73 * 74 * Historical practice is that the cursor ends at the first character 75 * in the file. 76 */ 77 if (cp->lno == 1) { 78 if (db_last(sp, &lno)) 79 return (1); 80 if (lno == 0) { 81 for (; tp != NULL; 82 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q)) 83 if (db_append(sp, 1, lno, tp->lb, tp->len)) 84 return (1); 85 rp->lno = 1; 86 rp->cno = 0; 87 return (0); 88 } 89 } 90 91 /* If a line mode buffer, append each new line into the file. */ 92 if (F_ISSET(cbp, CB_LMODE)) { 93 lno = append ? cp->lno : cp->lno - 1; 94 rp->lno = lno + 1; 95 for (; tp != NULL; 96 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q)) 97 if (db_append(sp, 1, lno, tp->lb, tp->len)) 98 return (1); 99 rp->cno = 0; 100 (void)nonblank(sp, rp->lno, &rp->cno); 101 return (0); 102 } 103 104 /* 105 * If buffer was cut in character mode, replace the current line with 106 * one built from the portion of the first line to the left of the 107 * split plus the first line in the CB. Append each intermediate line 108 * in the CB. Append a line built from the portion of the first line 109 * to the right of the split plus the last line in the CB. 110 * 111 * Get the first line. 112 */ 113 lno = cp->lno; 114 if (db_get(sp, lno, DBG_FATAL, &p, &len)) 115 return (1); 116 117 GET_SPACE_RETW(sp, bp, blen, tp->len + len + 1); 118 t = bp; 119 120 /* Original line, left of the split. */ 121 if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) { 122 MEMCPY(bp, p, clen); 123 p += clen; 124 t += clen; 125 } 126 127 /* First line from the CB. */ 128 if (tp->len != 0) { 129 MEMCPY(t, tp->lb, tp->len); 130 t += tp->len; 131 } 132 133 /* Calculate length left in the original line. */ 134 clen = len == 0 ? 0 : len - (cp->cno + (append ? 1 : 0)); 135 136 /* 137 * !!! 138 * In the historical 4BSD version of vi, character mode puts within 139 * a single line have two cursor behaviors: if the put is from the 140 * unnamed buffer, the cursor moves to the character inserted which 141 * appears last in the file. If the put is from a named buffer, 142 * the cursor moves to the character inserted which appears first 143 * in the file. In System III/V, it was changed at some point and 144 * the cursor always moves to the first character. In both versions 145 * of vi, character mode puts that cross line boundaries leave the 146 * cursor on the first character. Nvi implements the System III/V 147 * behavior, and expect POSIX.2 to do so as well. 148 */ 149 rp->lno = lno; 150 rp->cno = len == 0 ? 0 : sp->cno + (append && tp->len ? 1 : 0); 151 152 /* 153 * If no more lines in the CB, append the rest of the original 154 * line and quit. Otherwise, build the last line before doing 155 * the intermediate lines, because the line changes will lose 156 * the cached line. 157 */ 158 if (TAILQ_NEXT(tp, q) == NULL) { 159 if (clen > 0) { 160 MEMCPY(t, p, clen); 161 t += clen; 162 } 163 if (db_set(sp, lno, bp, t - bp)) 164 goto err; 165 if (sp->rptlchange != lno) { 166 sp->rptlchange = lno; 167 ++sp->rptlines[L_CHANGED]; 168 } 169 } else { 170 /* 171 * Have to build both the first and last lines of the 172 * put before doing any sets or we'll lose the cached 173 * line. Build both the first and last lines in the 174 * same buffer, so we don't have to have another buffer 175 * floating around. 176 * 177 * Last part of original line; check for space, reset 178 * the pointer into the buffer. 179 */ 180 ltp = TAILQ_LAST(cbp->textq, _texth); 181 len = t - bp; 182 ADD_SPACE_RETW(sp, bp, blen, ltp->len + clen); 183 t = bp + len; 184 185 /* Add in last part of the CB. */ 186 MEMCPY(t, ltp->lb, ltp->len); 187 if (clen) 188 MEMCPY(t + ltp->len, p, clen); 189 clen += ltp->len; 190 191 /* 192 * Now: bp points to the first character of the first 193 * line, t points to the last character of the last 194 * line, t - bp is the length of the first line, and 195 * clen is the length of the last. Just figured you'd 196 * want to know. 197 * 198 * Output the line replacing the original line. 199 */ 200 if (db_set(sp, lno, bp, t - bp)) 201 goto err; 202 if (sp->rptlchange != lno) { 203 sp->rptlchange = lno; 204 ++sp->rptlines[L_CHANGED]; 205 } 206 207 /* Output any intermediate lines in the CB. */ 208 for (tp = TAILQ_NEXT(tp, q); TAILQ_NEXT(tp, q) != NULL; 209 ++lno, ++sp->rptlines[L_ADDED], tp = TAILQ_NEXT(tp, q)) 210 if (db_append(sp, 1, lno, tp->lb, tp->len)) 211 goto err; 212 213 if (db_append(sp, 1, lno, t, clen)) 214 goto err; 215 ++sp->rptlines[L_ADDED]; 216 } 217 rval = 0; 218 219 if (0) 220 err: rval = 1; 221 222 FREE_SPACEW(sp, bp, blen); 223 return (rval); 224 } 225