/*- * 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_sentence.c 8.1 (Berkeley) 6/9/93"; #endif /* not lint */ #include <sys/types.h> #include "vi.h" #include "vcmd.h" /* * Sentences are sequences of characters terminated by a period followed * by at least two spaces or a newline. * * Historical vi mishandled lines with only white-space characters. Forward * sentences treated them as part of the current sentence, backward sentences * treated them as different sentences. This implementation treats lines with * only white-space characters and empty lines as sentence delimiters, not * sentences, in both directions. */ #define EATBLANK(sp) \ while (getc_next(sp, ep, FORWARD, &ch) && \ (ch == EMPTYLINE || ch == ' ' || ch == '\t')) #define ISSPACE(ch) \ (ch == EMPTYLINE || ch == ' ' || ch == '\t') /* * v_sentencef -- [count]) * Move forward count sentences. */ int v_sentencef(sp, ep, vp, fm, tm, rp) SCR *sp; EXF *ep; VICMDARG *vp; MARK *fm, *tm, *rp; { enum { NONE, PERIOD, BLANK } state; int ch; u_long cnt; cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; if (getc_init(sp, ep, fm, &ch)) return (1); /* * If in white-space, the next start of sentence counts as one. * This may not handle " . " correctly, but it's real unclear * what correctly means in that case. */ if (ISSPACE(ch)) { EATBLANK(sp); if (--cnt == 0) { getc_set(sp, ep, rp); if (fm->lno != rp->lno || fm->cno != rp->cno) return (0); v_eof(sp, ep, NULL); return (1); } } for (state = NONE; getc_next(sp, ep, FORWARD, &ch);) switch(ch) { case EMPTYLINE: if ((state == PERIOD || state == BLANK) && --cnt == 0) { EATBLANK(sp); getc_set(sp, ep, rp); return (0); } state = NONE; break; case '.': case '?': case '!': state = PERIOD; break; case ' ': case '\t': if (state == PERIOD) { state = BLANK; break; } if (state == BLANK && --cnt == 0) { EATBLANK(sp); getc_set(sp, ep, rp); return (0); } break; default: state = NONE; break; } /* EOF is a movement sink. */ getc_set(sp, ep, rp); if (fm->lno != rp->lno || fm->cno != rp->cno) return (0); v_eof(sp, ep, NULL); return (1); } #undef EATBLANK #define EATBLANK(sp) \ while (getc_next(sp, ep, BACKWARD, &ch) && \ (ch == EMPTYLINE || ch == ' ' || ch == '\t')) /* * v_sentenceb -- [count]) * Move forward count sentences. */ int v_sentenceb(sp, ep, vp, fm, tm, rp) SCR *sp; EXF *ep; VICMDARG *vp; MARK *fm, *tm, *rp; { int ch, last1, last2; u_long cnt; if (fm->lno == 1 && fm->cno == 0) { v_sof(sp, NULL); return (1); } cnt = F_ISSET(vp, VC_C1SET) ? vp->count : 1; if (getc_init(sp, ep, fm, &ch)) return (1); /* * Make ". xxx" with the cursor on the 'x', and "xxx. ", with the * cursor in the spaces, work. */ if (getc_next(sp, ep, BACKWARD, &ch) && ISSPACE(ch)) EATBLANK(sp); for (last1 = last2 = 'a'; getc_next(sp, ep, BACKWARD, &ch);) { if ((ch == '.' || ch == '?' || ch == '!') && ISSPACE(last1) && ISSPACE(last2) && --cnt == 0) { while (getc_next(sp, ep, FORWARD, &ch) && ISSPACE(ch)); getc_set(sp, ep, rp); return (0); } last2 = last1; last1 = ch; } /* SOF is a movement sink. */ getc_set(sp, ep, rp); return (0); }