setfmt.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 122 行

#ifndef lint
static char	*sccsid = " @(#)setfmt.c	4.1	(ULTRIX)	7/17/90";
#endif lint

/************************************************************************
 *									*
 *			Copyright (c) 1986 by				*
 *		Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/

/************************************************************************
*
*			Modification History
*
*	David Metsky		14-Jan-86
*
* 001	Replaced old version with BSD 4.3 version as part of upgrade.
*
*	Based on:	setfmt.c	5.1		6/7/85
*
*************************************************************************/

#include "defs.h"
#include "format.h"

#define GLITCH '\2'

extern char *fmtptr, *s_init;
extern int fmt_strings;

setfmt(lp)
struct Labelblock *lp;
{
int fmt_len, frmt_str_lab;
char *s, *lexline();

s = lexline(&fmt_len);
preven(ALILONG);
prlabel(asmfile, lp->labelno);
if( pars_f(s) != 0) {
	err_fmt(fmt_len);
} else {
	fprintf( asmfile, ".word %d\n", FMT_COMP ); /* precompiled format */
	fprintf( asmfile, ".word %d\n", pc );
	frmt_str_lab = newlabel();	/* to mark loc of format string */
	prcona( asmfile, frmt_str_lab );
	putshrts( syl, sizeof(struct syl)/SZSHORT*pc );
}
if( fmt_strings ) pruse( asmfile, USEINIT) ;
prlabel(asmfile, frmt_str_lab );
putstr(asmfile, s, fmt_len);
if( fmt_strings ) pruse( asmfile, USECONST) ;
flline();
}

LOCAL
putshrts( words, count )
short *words;
{
    while ( count-- > 0 )
	fprintf( asmfile, ".word %d\n", *words++ );
}

static char *fmt_seg_ptr;

LOCAL
err_fmt(fmt_len)
{
	int i;
	char *ep, *end_ptr = s_init+fmt_len;
	char fmt_seg[50];

	fmt_seg_ptr = fmt_seg;
	i = fmtptr - s_init;
	ep = fmtptr - (i<25?i:25);
	i = i + 5;
	while(i && *ep && ep<end_ptr)
	{
		if(ep==fmtptr) save_char('|',fmt_seg);
		save_char(*ep);
		ep++; i--;
	}
	*fmt_seg_ptr++ = '\0';
	errstr("Error in format:  %s", fmt_seg);
}

LOCAL
save_char(c)
int	c;
{
	c &= 0177;
	if( c == GLITCH ) {
		c = '"';
	} else if (c < ' ' || c == 0177) {
		*fmt_seg_ptr++ ='^';
		c ^= 0100;
	} 
	*fmt_seg_ptr++ = c;
}