/*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef lint /* from: static char sccsid[] = "@(#)cut.c 8.20 (Berkeley) 1/23/94"; */ static char *rcsid = "$Id: cut.c,v 1.2 1994/01/24 06:38:47 cgd Exp $"; #endif /* not lint */ #include #include #include #include #include #include #include "vi.h" static int cb_line __P((SCR *, EXF *, recno_t, size_t, size_t, TEXT **)); static int cb_rotate __P((SCR *)); /* * cut -- * Put a range of lines/columns into a buffer. * * There are two buffer areas, both found in the global structure. The first * is the linked list of all the buffers the user has named, the second is the * default buffer storage. There is a pointer, too, which is the current * default buffer, i.e. it may point to the default buffer or a named buffer * depending on into what buffer the last text was cut. In both delete and * yank operations, text is cut into either the buffer named by the user, or * the default buffer. If it's a delete of information on more than a single * line, the contents of the numbered buffers are rotated up one, the contents * of the buffer named '9' are discarded, and the text is also cut into the * buffer named '1'. * * In all cases, upper-case buffer names are the same as lower-case names, * with the exception that they cause the buffer to be appended to instead * of replaced. * * !!! * The contents of the default buffer would disappear after most operations in * historic vi. It's unclear that this is useful, so we don't bother. * * When users explicitly cut text into the numeric buffers, historic vi became * genuinely strange. I've never been able to figure out what was supposed to * happen. It behaved differently if you deleted text than if you yanked text, * and, in the latter case, the text was appended to the buffer instead of * replacing the contents. Hopefully it's not worth getting right. */ int cut(sp, ep, cbp, namep, fm, tm, flags) SCR *sp; EXF *ep; CB *cbp; CHAR_T *namep; int flags; MARK *fm, *tm; { CHAR_T name; TEXT *tp; recno_t lno; size_t len; int append, namedbuffer, setdefcb; #if defined(DEBUG) && 0 TRACE(sp, "cut: from {%lu, %d}, to {%lu, %d}%s\n", fm->lno, fm->cno, tm->lno, tm->cno, LF_ISSET(CUT_LINEMODE) ? " LINE MODE" : ""); #endif if (cbp == NULL) { if (LF_ISSET(CUT_DELETE) && (LF_ISSET(CUT_LINEMODE) || fm->lno != tm->lno)) { (void)cb_rotate(sp); name = '1'; goto defcb; } if (namep == NULL) { cbp = sp->gp->dcb_store; append = namedbuffer = 0; setdefcb = 1; } else { name = *namep; defcb: CBNAME(sp, cbp, name); append = isupper(name); namedbuffer = setdefcb = 1; } } else append = namedbuffer = setdefcb = 0; /* * If this is a new buffer, create it and add it into the list. * Otherwise, if it's not an append, free its current contents. */ if (cbp == NULL) { CALLOC(sp, cbp, CB *, 1, sizeof(CB)); cbp->name = name; CIRCLEQ_INIT(&cbp->textq); if (namedbuffer) { LIST_INSERT_HEAD(&sp->gp->cutq, cbp, q); } else sp->gp->dcb_store = cbp; } else if (!append) { text_lfree(&cbp->textq); cbp->len = 0; cbp->flags = 0; } /* In line mode, it's pretty easy, just cut the lines. */ if (LF_ISSET(CUT_LINEMODE)) { for (lno = fm->lno; lno <= tm->lno; ++lno) { if (cb_line(sp, ep, lno, 0, 0, &tp)) goto mem; CIRCLEQ_INSERT_TAIL(&cbp->textq, tp, q); cbp->len += tp->len; } cbp->flags |= CB_LMODE; } else { /* Get the first line. */ len = fm->lno < tm->lno ? 0 : tm->cno - fm->cno; if (cb_line(sp, ep, fm->lno, fm->cno, len, &tp)) goto mem; CIRCLEQ_INSERT_TAIL(&cbp->textq, tp, q); cbp->len += tp->len; /* Get the intermediate lines. */ for (lno = fm->lno; ++lno < tm->lno;) { if (cb_line(sp, ep, lno, 0, 0, &tp)) goto mem; CIRCLEQ_INSERT_TAIL(&cbp->textq, tp, q); cbp->len += tp->len; } /* Get the last line. */ if (tm->lno > fm->lno && tm->cno > 0) { if (cb_line(sp, ep, lno, 0, tm->cno, &tp)) { mem: if (append) msgq(sp, M_ERR, "Contents of %s buffer lost.", charname(sp, name)); text_lfree(&cbp->textq); cbp->len = 0; cbp->flags = 0; return (1); } CIRCLEQ_INSERT_TAIL(&cbp->textq, tp, q); cbp->len += tp->len; } } if (setdefcb) sp->gp->dcbp = cbp; /* Repoint default buffer. */ return (0); } /* * cb_rotate -- * Rotate the numbered buffers up one. */ static int cb_rotate(sp) SCR *sp; { CB *cbp, *del_cbp; del_cbp = NULL; for (cbp = sp->gp->cutq.lh_first; cbp != NULL; cbp = cbp->q.le_next) switch(cbp->name) { case '1': cbp->name = '2'; break; case '2': cbp->name = '3'; break; case '3': cbp->name = '4'; break; case '4': cbp->name = '5'; break; case '5': cbp->name = '6'; break; case '6': cbp->name = '7'; break; case '7': cbp->name = '8'; break; case '8': cbp->name = '9'; break; case '9': del_cbp = cbp; break; } if (del_cbp != NULL) { LIST_REMOVE(del_cbp, q); text_lfree(&del_cbp->textq); FREE(del_cbp, sizeof(CB)); } return (0); } /* * cb_line -- * Cut a portion of a single line. */ static int cb_line(sp, ep, lno, fcno, clen, newp) SCR *sp; EXF *ep; recno_t lno; size_t fcno, clen; TEXT **newp; { TEXT *tp; size_t len; char *p; if ((p = file_gline(sp, ep, lno, &len)) == NULL) { GETLINE_ERR(sp, lno); return (1); } if ((*newp = tp = text_init(sp, NULL, 0, len)) == NULL) return (1); /* * A length of zero means to cut from the MARK to the end * of the line. */ if (len != 0) { if (clen == 0) clen = len - fcno; memmove(tp->lb, p + fcno, clen); tp->len = clen; } return (0); } /* * text_init -- * Allocate a new TEXT structure. */ TEXT * text_init(sp, p, len, total_len) SCR *sp; const char *p; size_t len, total_len; { TEXT *tp; MALLOC(sp, tp, TEXT *, sizeof(TEXT)); if (tp == NULL) return (NULL); /* ANSI C doesn't define a call to malloc(2) for 0 bytes. */ if (tp->lb_len = total_len) { MALLOC(sp, tp->lb, CHAR_T *, tp->lb_len); if (tp->lb == NULL) { free(tp); return (NULL); } if (p != NULL && len != 0) memmove(tp->lb, p, len); } else tp->lb = NULL; tp->len = len; tp->ai = tp->insert = tp->offset = tp->owrite = 0; tp->wd = NULL; tp->wd_len = 0; return (tp); } /* * text_lfree -- * Free a chain of text structures. */ void text_lfree(headp) TEXTH *headp; { TEXT *tp; while ((tp = headp->cqh_first) != (void *)headp) { CIRCLEQ_REMOVE(headp, tp, q); text_free(tp); } } /* * text_free -- * Free a text structure. */ void text_free(tp) TEXT *tp; { if (tp->lb != NULL) FREE(tp->lb, tp->lb_len); if (tp->wd != NULL) FREE(tp->wd, tp->wd_len); FREE(tp, sizeof(TEXT)); } /* * put -- * Put text buffer contents into the file. * * !!! * Historically, pasting into a file with no lines in vi would preserve * the single blank line. This is almost certainly a result of the fact * that historic vi couldn't deal with a file that had no lines in it. * This implementation treats that as a bug, and does not retain the * blank line. */ int put(sp, ep, cbp, namep, cp, rp, append) SCR *sp; EXF *ep; CB *cbp; CHAR_T *namep; MARK *cp, *rp; int append; { CHAR_T name; TEXT *ltp, *tp; recno_t lno; size_t blen, clen, len; char *bp, *p, *t; if (cbp == NULL) if (namep == NULL) { cbp = sp->gp->dcbp; if (cbp == NULL) { msgq(sp, M_ERR, "The default buffer is empty."); return (1); } } else { name = *namep; CBNAME(sp, cbp, name); if (cbp == NULL) { msgq(sp, M_ERR, "Buffer %s is empty.", charname(sp, name)); return (1); } } tp = cbp->textq.cqh_first; /* * It's possible to do a put into an empty file, meaning that the * cut buffer simply becomes the file. It's a special case so * that we can ignore it in general. * * Historical practice is that the cursor ends up on the first * non-blank character of the first line inserted. */ if (cp->lno == 1) { if (file_lline(sp, ep, &lno)) return (1); if (lno == 0) { for (; tp != (void *)&cbp->textq; ++lno, tp = tp->q.cqe_next) if (file_aline(sp, ep, 1, lno, tp->lb, tp->len)) return (1); rp->lno = 1; rp->cno = 0; (void)nonblank(sp, ep, rp->lno, &rp->cno); goto ret; } } /* If a line mode buffer, append each new line into the file. */ if (F_ISSET(cbp, CB_LMODE)) { lno = append ? cp->lno : cp->lno - 1; rp->lno = lno + 1; for (; tp != (void *)&cbp->textq; ++lno, tp = tp->q.cqe_next) if (file_aline(sp, ep, 1, lno, tp->lb, tp->len)) return (1); rp->cno = 0; (void)nonblank(sp, ep, rp->lno, &rp->cno); goto ret; } /* * If buffer was cut in character mode, replace the current line with * one built from the portion of the first line to the left of the * split plus the first line in the CB. Append each intermediate line * in the CB. Append a line built from the portion of the first line * to the right of the split plus the last line in the CB. * * Get the first line. */ lno = cp->lno; if ((p = file_gline(sp, ep, lno, &len)) == NULL) { GETLINE_ERR(sp, lno); return (1); } GET_SPACE_RET(sp, bp, blen, tp->len + len + 1); t = bp; /* Original line, left of the split. */ if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) { memmove(bp, p, clen); p += clen; t += clen; } /* First line from the CB. */ memmove(t, tp->lb, tp->len); t += tp->len; /* Calculate length left in original line. */ clen = len ? len - cp->cno - (append ? 1 : 0) : 0; /* * If no more lines in the CB, append the rest of the original * line and quit. Otherwise, build the last line before doing * the intermediate lines, because the line changes will lose * the cached line. */ if (tp->q.cqe_next == (void *)&cbp->textq) { /* * Historical practice is that if a non-line mode put * is inside a single line, the cursor ends up on the * last character inserted. */ rp->lno = lno; rp->cno = (t - bp) - 1; if (clen > 0) { memmove(t, p, clen); t += clen; } if (file_sline(sp, ep, lno, bp, t - bp)) goto mem; } else { /* * Have to build both the first and last lines of the * put before doing any sets or we'll lose the cached * line. Build both the first and last lines in the * same buffer, so we don't have to have another buffer * floating around. * * Last part of original line; check for space, reset * the pointer into the buffer. */ ltp = cbp->textq.cqh_last; len = t - bp; ADD_SPACE_RET(sp, bp, blen, ltp->len + clen); t = bp + len; /* Add in last part of the CB. */ memmove(t, ltp->lb, ltp->len); if (clen) memmove(t + ltp->len, p, clen); clen += ltp->len; /* * Now: bp points to the first character of the first * line, t points to the last character of the last * line, t - bp is the length of the first line, and * clen is the length of the last. Just figured you'd * want to know. * * Output the line replacing the original line. */ if (file_sline(sp, ep, lno, bp, t - bp)) goto mem; /* * Historical practice is that if a non-line mode put * covers multiple lines, the cursor ends up on the * first character inserted. (Of course.) */ rp->lno = lno; rp->cno = (t - bp) - 1; /* Output any intermediate lines in the CB. */ for (tp = tp->q.cqe_next; tp->q.cqe_next != (void *)&cbp->textq; ++lno, tp = tp->q.cqe_next) if (file_aline(sp, ep, 1, lno, tp->lb, tp->len)) goto mem; if (file_aline(sp, ep, 1, lno, t, clen)) { mem: FREE_SPACE(sp, bp, blen); return (1); } } FREE_SPACE(sp, bp, blen); /* Reporting... */ ret: sp->rptlines[L_PUT] += lno - cp->lno; return (0); }