InfoMagic Source Code 1993 July/THE_SOURCE_CODE_CD_ROM.iso/bsd_srcs/usr.bin/pascal/src/yymain.c

C/C++ Source or Header | 1991-04-16 | 4.8 KB | 216 lines

/*-
 * Copyright (c) 1980 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[] = "@(#)yymain.c    5.2 (Berkeley) 4/16/91";
#endif /* not lint */

#include "whoami.h"
#include "0.h"
#include "tree_ty.h"    /* must be included for yy.h */
#include "yy.h"
#include <a.out.h>
#include "objfmt.h"
#include <signal.h>
#include "config.h"

/*
 * Yymain initializes each of the utility
 * clusters and then starts the processing
 * by calling yyparse.
 */
yymain()
{

#ifdef OBJ
/*
 * initialize symbol table temp files
 */
    startnlfile();
#endif
    /*
     * Initialize the scanner
     */
#ifdef PXP
    if (bracket == 0) {
#endif
        if (getline() == -1) {
            Perror(filename, "No lines in file");
            pexit(NOSTART);
        }
#ifdef PXP
    } else
        yyline = 0;
#endif

#ifdef PI
#   ifdef OBJ
    magic();
#   endif OBJ
#endif
    line = 1;
    errpfx = 'E';
    /*
     * Initialize the clusters
     *
    initstring();
     */
    inithash();
    inittree();
#ifdef PI
    initnl();
#endif

    /*
     * Process the input
     */
    yyparse();
#ifdef PI
#   ifdef OBJ

    /*
     * save outermost block of namelist
     */
    savenl(NLNIL);

    magic2();
#   endif OBJ
#   ifdef DEBUG
    dumpnl(NLNIL);
#   endif
#endif

#ifdef PXP
    prttab();
    if (onefile) {
        extern int outcol;

        if (outcol)
            pchr('\n');
        flush();
        if (eflg) {
            writef(2, "File not rewritten because of errors\n");
            pexit(ERRS);
        }
        (void) signal(SIGHUP, SIG_IGN);
        (void) signal(SIGINT, SIG_IGN);
        copyfile();
    }
#endif
    pexit(eflg ? ERRS : AOK);
}

#ifdef PXP
copyfile()
{
    extern int fout[];
    register int c;

    (void) close(1);
    if (creat(firstname, 0644) != 1) {
        perror(firstname);
        pexit(ERRS);
    }
    (void) lseek(fout[0], 0l, 0);
    while ((c = read(fout[0], &fout[3], 512)) > 0) {
        if (write(1, &fout[3], c) != c) {
            perror(firstname);
            pexit(ERRS);
        }
    }
}
#endif


#ifdef PI
#ifdef OBJ

static
struct exec magichdr;

magic()
{

    short        buf[HEADER_BYTES / sizeof ( short )];
    unsigned    *ubuf = (unsigned *) buf;
    register int    hf, i;

    hf = open(px_header,0);
    if (hf >= 0 && read(hf, (char *) buf, HEADER_BYTES) > sizeof(struct exec)) {
        magichdr.a_magic = ubuf[0];
        magichdr.a_text = ubuf[1];
        magichdr.a_data = ubuf[2];
        magichdr.a_bss = ubuf[3];
        magichdr.a_syms = ubuf[4];
        magichdr.a_entry = ubuf[5];
        magichdr.a_trsize = ubuf[6];
        magichdr.a_drsize = ubuf[7];
        for (i = 0; i < HEADER_BYTES / sizeof ( short ); i++)
            word(buf[i]);
    }
    (void) close(hf);
}
#endif OBJ

#ifdef OBJ
magic2()
{
    struct pxhdr pxhd;
    extern long lseek();

    if  (magichdr.a_magic != 0407)
        panic ( "magic2" );
    pflush();
    magichdr.a_data = ( unsigned ) lc - magichdr.a_text;
    magichdr.a_data -= sizeof (struct exec);
    pxhd.objsize = ( ( unsigned ) lc) - HEADER_BYTES;
    pxhd.symtabsize = nlhdrsize();
    magichdr.a_data += pxhd.symtabsize;
    (void) time((long *) (&pxhd.maketime));
    pxhd.magicnum = MAGICNUM;
    (void) lseek(ofil, 0l, 0);
    write(ofil, (char *) (&magichdr), sizeof(struct exec));
    (void) lseek(ofil, ( long ) ( HEADER_BYTES - sizeof ( pxhd ) ) , 0);
    write(ofil, (char *) (&pxhd), sizeof (pxhd));
}
#endif OBJ
#endif

#ifdef PXP
writef(i, cp)
{

    write(i, cp, strlen(cp));
}
#endif