BSD 4_3_Tahoe release

[unix-history] / usr / src / usr.bin / f77 / f77.vax / f77pass1 / setfmt.c

/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/

#ifndef lint
static char sccsid[] = "@(#)setfmt.c    5.1 (Berkeley) 6/7/85";
#endif not lint

#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;
}