/*- * 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 static char sccsid[] = "@(#)v_replace.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include <ctype.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include "vi.h" #include "vcmd.h" /* * v_replace -- [count]rc * The r command in historic vi was almost beautiful in its badness. * For example, "r<erase>" and "r<word erase>" beeped the terminal * and deleted a single character. "Nr<carriage return>", where N * was greater than 1, inserted a single carriage return. This may * not be "right", but at least it's not insane. */ int v_replace(sp, ep, vp, fm, tm, rp) SCR *sp; EXF *ep; VICMDARG *vp; MARK *fm, *tm, *rp; { TEXT *tp; size_t blen, len; recno_t lno; u_long cnt; int rval; char *bp, *p; /* * If the line doesn't exist, or it's empty, replacement isn't * allowed. It's not hard to implement, but replacing "nothing" * has odd semantics. */ if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) { if (file_lline(sp, ep, &lno)) return (1); if (lno != 0) { GETLINE_ERR(sp, fm->lno); return (1); } goto nochar; } if (len == 0) { nochar: msgq(sp, M_BERR, "No characters to replace"); return (1); } /* * Figure out how many characters to be replace; for no particular * reason other than that the semantics of replacing the newline * are confusing, only permit the replacement of the characters in * the current line. */ cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; rp->cno = fm->cno + cnt - 1; if (rp->cno > len - 1) { v_eol(sp, ep, fm); return (1); } /* Copy the line. */ GET_SPACE(sp, bp, blen, len); memmove(bp, p, len); p = bp; if (sp->special[vp->character] == K_CR || sp->special[vp->character] == K_NL) { /* Set return line. */ rp->lno = fm->lno + cnt; /* The first part of the current line. */ if (file_sline(sp, ep, fm->lno, p, fm->cno)) return (1); /* * The rest of the current line. And, of course, now it gets * tricky. Any white space after the replaced character is * stripped, and autoindent is applied. Put the cursor on the * last indent character as did historic vi. */ for (p += fm->cno + cnt, len -= fm->cno + cnt; len && isspace(*p); --len, ++p); if ((tp = text_init(sp, p, len, len)) == NULL) return (1); if (txt_auto(sp, ep, fm->lno, NULL, tp)) return (1); rp->cno = tp->ai ? tp->ai - 1 : 0; if (file_aline(sp, ep, 1, fm->lno, tp->lb, tp->len)) return (1); text_free(tp); /* All of the middle lines. */ while (--cnt) if (file_aline(sp, ep, 1, fm->lno, "", 0)) return (1); return (0); } memset(bp + fm->cno, vp->character, cnt); rval = file_sline(sp, ep, fm->lno, bp, len); rp->lno = fm->lno; rp->cno = fm->cno + cnt - 1; FREE_SPACE(sp, bp, blen); return (rval); }