ex_print.c

早期freebsd实现

/*-
 * Copyright (c) 1992, 1993, 1994
 *	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[] = "@(#)ex_print.c	8.9 (Berkeley) 4/10/94";
#endif /* not lint */

#include <sys/types.h>
#include <sys/queue.h>
#include <sys/time.h>

#include <bitstring.h>
#include <ctype.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <termios.h>

#include "compat.h"
#include <db.h>
#include <regex.h>

#include "vi.h"
#include "excmd.h"

/*
 * ex_list -- :[line [,line]] l[ist] [count] [flags]
 *
 *	Display the addressed lines such that the output is unambiguous.
 */
int
ex_list(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	if (ex_print(sp, ep,
	    &cmdp->addr1, &cmdp->addr2, cmdp->flags | E_F_LIST))
		return (1);
	sp->lno = cmdp->addr2.lno;
	sp->cno = cmdp->addr2.cno;
	return (0);
}

/*
 * ex_number -- :[line [,line]] nu[mber] [count] [flags]
 *
 *	Display the addressed lines with a leading line number.
 */
int
ex_number(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	if (ex_print(sp, ep,
	    &cmdp->addr1, &cmdp->addr2, cmdp->flags | E_F_HASH))
		return (1);
	sp->lno = cmdp->addr2.lno;
	sp->cno = cmdp->addr2.cno;
	return (0);
}

/*
 * ex_pr -- :[line [,line]] p[rint] [count] [flags]
 *
 *	Display the addressed lines.
 */
int
ex_pr(sp, ep, cmdp)
	SCR *sp;
	EXF *ep;
	EXCMDARG *cmdp;
{
	if (ex_print(sp, ep, &cmdp->addr1, &cmdp->addr2, cmdp->flags))
		return (1);
	sp->lno = cmdp->addr2.lno;
	sp->cno = cmdp->addr2.cno;
	return (0);
}

/*
 * ex_print --
 *	Print the selected lines.
 */
int
ex_print(sp, ep, fp, tp, flags)
	SCR *sp;
	EXF *ep;
	MARK *fp, *tp;
	register int flags;
{
	recno_t from, to;
	size_t len;
	u_long ts;
	int ch, cnt, col, rlen;
	char *p, buf[10];

	ts = O_VAL(sp, O_TABSTOP);
	F_SET(sp, S_INTERRUPTIBLE);
	for (from = fp->lno, to = tp->lno; from <= to; ++from) {
		/* Display the line number. */
		if (LF_ISSET(E_F_HASH))
			col = ex_printf(EXCOOKIE, "%7ld ", from);
		else
			col = 0;

		/*
		 * Display the line.  The format for E_F_PRINT isn't very good,
		 * especially in handling end-of-line tabs, but they're almost
		 * backward compatible.
		 */
		if ((p = file_gline(sp, ep, from, &len)) == NULL) {
			GETLINE_ERR(sp, from);
			return (1);
		}

#define	WCHECK(ch) {							\
	if (col == sp->cols) {						\
		(void)ex_printf(EXCOOKIE, "\n");			\
		col = 0;						\
	}								\
	(void)ex_printf(EXCOOKIE, "%c", ch);				\
	++col;								\
}
		for (rlen = len; rlen--;) {
			ch = *p++;
			if (LF_ISSET(E_F_LIST))
				if (ch != '\t' && isprint(ch)) {
					WCHECK(ch);
				} else if (ch & 0x80) {
					(void)snprintf(buf,
					    sizeof(buf), "\\%03o", ch);
					len = strlen(buf);
					for (cnt = 0; cnt < len; ++cnt)
						WCHECK(buf[cnt]);
				} else {
					WCHECK('^');
					WCHECK(ch + 0x40);
				}
			else {
				ch &= 0x7f;
				if (ch == '\t') {
					for (len = ts - col % ts;
					    col < sp->cols && len--; ++col)
						(void)ex_printf(EXCOOKIE, " ");
					if (col == sp->cols) {
						col = 0;
						(void)ex_printf(EXCOOKIE, "\n");
					}
				} else if (isprint(ch)) {
					WCHECK(ch);
				} else if (ch == '\n') {
					col = 0;
					(void)ex_printf(EXCOOKIE, "\n");
				} else {
					WCHECK('^');
					WCHECK(ch + 0x40);
				}
			}
		}
		if (LF_ISSET(E_F_LIST)) {
			WCHECK('$');
		} else if (len == 0) {
			/*
			 * If the line is empty, output a space
			 * to overwrite the colon prompt.
			 */
			WCHECK(' ');
		}
		(void)ex_printf(EXCOOKIE, "\n");

		if (F_ISSET(sp, S_INTERRUPTED))
			break;
	}
	return (0);
}