/*- * 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_paragraph.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include <errno.h> #include <stdlib.h> #include <string.h> #include "vi.h" #include "vcmd.h" /* * Paragraphs are empty lines after text or values from the paragraph or * section options. */ /* * v_paragraphf -- [count]} * Move forward count paragraphs. */ int v_paragraphf(sp, ep, vp, fm, tm, rp) SCR *sp; EXF *ep; VICMDARG *vp; MARK *fm, *tm, *rp; { enum { P_INTEXT, P_INBLANK } pstate; size_t lastlen, len; recno_t cnt, lastlno, lno; char *p, *lp; /* Figure out what state we're currently in. */ lno = fm->lno; if ((p = file_gline(sp, ep, lno, &len)) == NULL) goto eof; /* * If we start in text, we want to switch states 2 * N - 1 * times, in non-text, 2 * N times. */ cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt *= 2; if (len == 0) pstate = P_INBLANK; else { --cnt; pstate = P_INTEXT; } for (;;) { lastlno = lno; lastlen = len; if ((p = file_gline(sp, ep, ++lno, &len)) == NULL) goto eof; switch (pstate) { case P_INTEXT: if (p[0] == '.' && len >= 2) for (lp = sp->paragraph; *lp; lp += 2) if (lp[0] == p[1] && (lp[1] == ' ' || lp[1] == p[2]) && !--cnt) goto found; if (len == 0) { if (!--cnt) goto found; pstate = P_INBLANK; } break; case P_INBLANK: if (len == 0) break; if (--cnt) { pstate = P_INTEXT; break; } /* * Historically, a motion command was up to the end * of the previous line, whereas the movement command * was to the start of the new "paragraph". */ found: if (F_ISSET(vp, VC_C | VC_D | VC_Y)) { rp->lno = lastlno; rp->cno = lastlen ? lastlen + 1 : 0; } else { rp->lno = lno; rp->cno = 0; } return (0); default: abort(); } } /* * EOF is a movement sink, however, the } command historically * moved to the end of the last line if repeatedly invoked. */ eof: if (fm->lno != lno - 1) { rp->lno = lno - 1; rp->cno = len ? len - 1 : 0; return (0); } if ((p = file_gline(sp, ep, fm->lno, &len)) == NULL) GETLINE_ERR(sp, fm->lno); if (fm->cno != (len ? len - 1 : 0)) { rp->lno = lno - 1; rp->cno = len ? len - 1 : 0; return (0); } v_eof(sp, ep, NULL); return (1); } /* * v_paragraphb -- [count]{ * Move forward count paragraph. */ int v_paragraphb(sp, ep, vp, fm, tm, rp) SCR *sp; EXF *ep; VICMDARG *vp; MARK *fm, *tm, *rp; { enum { P_INTEXT, P_INBLANK } pstate; size_t len; recno_t cnt, lno; char *p, *lp; /* * The { command historically moved to the beginning of the first * line if invoked on the first line. * * Check for SOF. */ if (fm->lno <= 1) { if (fm->cno == 0) { v_sof(sp, NULL); return (1); } rp->lno = 1; rp->cno = 0; return (0); } /* Figure out what state we're currently in. */ lno = fm->lno; if ((p = file_gline(sp, ep, lno, &len)) == NULL) goto sof; /* * If we start in text, we want to switch states 2 * N - 1 * times, in non-text, 2 * N times. */ cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; cnt *= 2; if (len == 0) pstate = P_INBLANK; else { --cnt; pstate = P_INTEXT; } for (;;) { if ((p = file_gline(sp, ep, --lno, &len)) == NULL) goto sof; switch (pstate) { case P_INTEXT: if (p[0] == '.' && len >= 2) for (lp = sp->paragraph; *lp; lp += 2) if (lp[0] == p[1] && (lp[1] == ' ' || lp[1] == p[2]) && !--cnt) goto found; if (len == 0) { if (!--cnt) goto found; pstate = P_INBLANK; } break; case P_INBLANK: if (len != 0) { if (!--cnt) { found: rp->lno = lno; rp->cno = 0; return (0); } pstate = P_INTEXT; } break; default: abort(); } } /* SOF is a movement sink. */ sof: rp->lno = 1; rp->cno = 0; return (0); }