831 lines
14 KiB
C
831 lines
14 KiB
C
/* asmrec.c -- microsoft 80x86 assembler
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**
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** microsoft (r) macro assembler
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** copyright (c) microsoft corp 1986. all rights reserved
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**
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** randy nevin
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**
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** 10/90 - Quick conversion to 32 bit by Jeff Spencer
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*/
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#include <stdio.h>
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#include <string.h>
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#include "asm86.h"
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#include "asmfcn.h"
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#include "asmctype.h"
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struct recpars {
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SYMBOL FARSYM *recptr;
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SYMBOL FARSYM *curfld;
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OFFSET recval;
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};
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struct recdef {
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USHORT fldcnt;
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USHORT reclen;
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SYMBOL FARSYM *recptr;
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SYMBOL FARSYM *curfld;
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short i;
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};
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VOID PASCAL CODESIZE recordspec PARMS((struct recdef *));
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VOID PASCAL CODESIZE recfill PARMS((struct recpars *));
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static OFFSET svpc = 0;
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static struct duprec FARSYM *pDUPCur;
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/*** checkvalue - insure value will fit in field
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*
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* checkvalue (width, sign, magnitude)
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*
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* Entry width = width of field
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* sign = sign of result
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* magnitude= magnitude of result
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* Exit none
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* Returns adjusted value
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* Calls none
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*/
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OFFSET PASCAL CODESIZE
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checkvalue (
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register SHORT width,
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register char sign,
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register OFFSET mag
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){
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register OFFSET mask;
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if (width == sizeof(OFFSET)*8)
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mask = OFFSETMAX;
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else
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mask = (1 << width) - 1;
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if (!sign) {
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if (width < sizeof(OFFSET)*8)
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if (mag > mask) {
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errorc (E_VOR);
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mag = mask;
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}
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}
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else {
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mag = OFFSETMAX - mag;
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mag++;
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if (width < sizeof(OFFSET)*8)
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if ((mag ^ OFFSETMAX) & ~mask) {
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errorc (E_VOR);
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mag = mask;
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}
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}
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return (mag & mask);
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}
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/*** recordspec - parse record field specification fld:wid[=val]
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*
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* recordspec (p);
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*
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* Entry p = pointer to record definition structure
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* Exit
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* Returns
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* Calls
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*/
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VOID PASCAL CODESIZE
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recordspec (
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register struct recdef *p
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){
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register SYMBOL FARSYM *fldptr;
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register USHORT width;
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register struct symbrecf FARSYM *s;
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char sign;
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OFFSET mag;
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getatom ();
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if (*naim.pszName) {
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if (!symFet ())
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symcreate (M_DEFINED | M_BACKREF, RECFIELD);
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else {
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if (symptr->symu.rec.recptr != p->recptr ||
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M_BACKREF & symptr->attr)
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errorn (E_SMD);
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symptr->attr |= M_BACKREF;
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}
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crefdef ();
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s = &(symptr->symu.rec);
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if (symptr->symkind != RECFIELD)
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/* Not field */
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errorn (E_SDK);
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else {
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/* Ptr to field */
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fldptr = symptr;
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if (!p->curfld)
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p->recptr->symu.rsmsym.rsmtype.rsmrec.reclist = fldptr;
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else
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p->curfld->symu.rec.recnxt = fldptr;
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/* New last field */
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p->curfld = fldptr;
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s->recptr = p->recptr;
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s->recnxt = NULL;
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p->fldcnt++;
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if (NEXTC () != ':')
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error (E_EXP,"colon");
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/* Get field width */
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width = (USHORT)exprconst ();
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if (skipblanks () == '=') {
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SKIPC ();
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mag = exprsmag (&sign);
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}
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else {
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sign = FALSE;
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mag = 0;
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}
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if (width == 0 ||
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p->reclen + width > wordsize*8) {
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STRNFCPY (save, p->curfld->nampnt->id);
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/*Overflow */
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error (E_VOR, save);
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width = 0;
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}
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s->recinit = checkvalue (width, sign, mag);
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s->recmsk = (OFFSET)((1L << width) - 1);
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s->recwid = (char)width;
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p->reclen += width;
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}
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}
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}
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/*** recorddefine - parse record definition
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*
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* recorddefine ();
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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VOID PASCAL CODESIZE
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recorddefine ()
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{
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struct recdef a;
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struct symbrecf FARSYM *s;
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register SHORT cbRec;
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a.reclen = 0;
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a.fldcnt = 0;
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checkRes();
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if (!symFet ()) {
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/* Make record */
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symcreate (M_DEFINED | M_BACKREF, REC);
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}
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else
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symptr->attr |= M_BACKREF;
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/* This is def */
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crefdef ();
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if (symptr->symkind != REC)
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/* Wasn't record */
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errorn (E_SDK);
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else {
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/* Leftmost bit of record */
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a.reclen = 0;
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/*No record filed yet */
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a.curfld = NULL;
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/* In case error */
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symptr->symu.rsmsym.rsmtype.rsmrec.reclist = NULL;
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/* Pointer to record name */
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a.recptr = symptr;
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/* Parse record field list */
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BACKC ();
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do {
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SKIPC ();
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recordspec (&a);
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} while (skipblanks() == ',');
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/* Length of record in bits */
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cbRec = a.reclen;
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a.recptr->length = cbRec;
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a.recptr->offset = (OFFSET)((1L << cbRec) - 1);
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a.recptr->symtype = (cbRec > 16 )? 4: ((cbRec > 8)? 2: 1);
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/* # of fields in record */
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a.recptr->symu.rsmsym.rsmtype.rsmrec.recfldnum = (char)a.fldcnt;
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/* 1st field */
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a.curfld = a.recptr->symu.rsmsym.rsmtype.rsmrec.reclist;
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}
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/* For all the fields adjust the shift (stored in offset),
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* initial value and mask so the last field is right justified */
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while (a.curfld) {
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s = &(a.curfld->symu.rec);
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/* Start of field */
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cbRec = (cbRec > s->recwid)? cbRec - s->recwid: 0;
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/* Shift count */
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a.curfld->offset = cbRec;
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s->recinit <<= cbRec;
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s->recmsk <<= cbRec;
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a.curfld = s->recnxt; /* Next field */
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}
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}
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/*** recfill - get initial value for field in list
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*
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* recfill (p);
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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VOID PASCAL CODESIZE
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recfill (
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register struct recpars *p
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){
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register char cc;
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struct symbrecf FARSYM *s;
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char sign;
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OFFSET mag, t;
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if (!p->curfld) {
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/* More fields than exist */
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errorc (E_MVD);
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}
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else {
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s = &(p->curfld->symu.rec);
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if ((cc = skipblanks ()) == ',' || cc == '>') {
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/* Use default value */
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t = s->recinit;
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}
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else {
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/* Have an override */
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mag = exprsmag (&sign);
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t = checkvalue (s->recwid, sign, mag);
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/* Scale value */
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t <<= p->curfld->offset;
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}
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/* Add in new field */
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if (s->recwid)
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p->recval = (p->recval & ~(s->recmsk)) | t;
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p->curfld = s->recnxt;
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}
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}
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/*** recordparse - parse record specification
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*
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* recordparse ();
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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OFFSET PASCAL CODESIZE
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recordparse ()
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{
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struct recpars a;
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struct symbrecf FARSYM *s;
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a.recptr = symptr; /* Current record */
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if (PEEKC () != '<')
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error (E_EXP,"<"); /* Must have < */
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else
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SKIPC ();
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/* No value yet */
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a.recval = 0;
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/* 1st field in record */
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a.curfld = a.recptr->symu.rsmsym.rsmtype.rsmrec.reclist;
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BACKC ();
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do { /* Fill in values */
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SKIPC ();
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recfill (&a);
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} while (skipblanks () == ',');
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while (a.curfld) {
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/* Fill in remaining defaults */
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s = &(a.curfld->symu.rec);
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if (s->recwid)
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a.recval = (a.recval & ~(s->recmsk)) | s->recinit;
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a.curfld = s->recnxt;
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}
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if (NEXTC () != '>') /* Must have > */
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error (E_EXP,">");
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return (a.recval); /* Value of record */
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}
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/*** recordinit - parse record allocation
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*
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* recordinit ();
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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VOID PASCAL CODESIZE
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recordinit ()
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{
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initflag = TRUE;
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strucflag = FALSE; /* This is RECORD init */
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recptr = symptr;
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optyp = TDB;
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if (symptr->symtype == 2)
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optyp = TDW;
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#ifdef V386
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else if (symptr->symtype == 4)
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optyp = TDD;
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#endif
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datadefine ();
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initflag = FALSE;
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}
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/*** nodecreate - create one DUP record
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*
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* nodecreate ();
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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struct duprec FARSYM * PASCAL CODESIZE
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nodecreate ()
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{
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register struct duprec FARSYM *node;
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node = (struct duprec FARSYM *)falloc (sizeof (*node), "nodecreate");
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node->rptcnt = 1;
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node->itemcnt = 0;
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node->duptype.dupnext.dup = NULL;
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node->itemlst = NULL;
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node->dupkind = NEST;
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return (node);
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}
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/*** strucdefine - define structure
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*
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* strucdefine ();
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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VOID PASCAL CODESIZE
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strucdefine ()
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{
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checkRes();
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if (!symFet()) {
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/* Make STRUC */
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symcreate (M_DEFINED | M_BACKREF, STRUC);
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}
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else
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symptr->attr |= M_BACKREF;
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/* This is definition */
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crefdef ();
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if (symptr->symkind != STRUC)
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errorn (E_SDK);
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else {
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symptr->attr |= M_BACKREF;
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recptr = symptr; /* Pointer to STRUC name */
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recptr->symu.rsmsym.rsmtype.rsmstruc.strucfldnum = 0;
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if (! pass2) {
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recptr->symu.rsmsym.rsmtype.rsmstruc.type = typeIndex;
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typeIndex += 3;
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if (pStrucCur)
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pStrucCur->alpha = recptr;
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else
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pStrucFirst = recptr;
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pStrucCur = recptr;
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}
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/* No labeled fields yet */
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recptr->symu.rsmsym.rsmtype.rsmstruc.struclist = NULL;
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/* Delete old STRUC */
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scandup (recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody, oblitdup);
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recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody = nodecreate ();
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struclabel = NULL; /* No named fields */
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strucprev = NULL; /* No body yet */
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count = 0; /* No fields yet */
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strucflag = TRUE; /* We are STRUC not RECORD */
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svpc = pcoffset; /* Save normal PC */
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pcoffset = 0; /* Relative to STRUC begin */
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swaphandler = TRUE; /* Switch to STRUC builder */
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handler = HSTRUC;
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}
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}
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/*** strucbuild - build the struc block
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*
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* strucbuild ();
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*
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* Entry
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* Exit
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* Returns
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* Calls
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*/
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VOID PASCAL CODESIZE
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strucbuild ()
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{
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labelflag = FALSE;
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optyp = 0;
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getatom ();
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#ifndef FEATURE
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if (naim.pszName[0] == '%' && naim.pszName[1] == 0) { /* expand all text macros */
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*begatom = ' ';
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substituteTMs();
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getatom();
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}
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#endif
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/* First, look for IF, ELSE & ENDIF stuff */
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if (fndir () && (opkind & CONDBEG)) {
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firstDirect();
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}
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else if (generate && *naim.pszName) {
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/* next, classify the current token, which is either
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* and ENDS, data label or data name */
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if (optyp == 0 || !fndir2 ()){
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/* first token was a label */
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switchname ();
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getatom ();
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optyp = 0;
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if (!fndir2 ())
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errorc(E_DIS);
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labelflag = TRUE; /* Do have label */
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switchname ();
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}
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|
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if (optyp == TENDS) {
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if (!symFet () || symptr != recptr)
|
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errorc(E_BNE);
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/* Have end of STRUC */
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handler = HPARSE;
|
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swaphandler = TRUE;
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strucflag = FALSE;
|
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recptr->symu.rsmsym.rsmtype.rsmstruc.strucfldnum =
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/* # of fields */
|
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recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody->itemcnt;
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|
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if (pcoffset & 0xFFFF0000)
|
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errorc (E_DVZ);
|
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recptr->symtype = (USHORT)pcoffset; /* Size of STRUC */
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recptr->length = 1;
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pcdisplay ();
|
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/* Restore PC */
|
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pcoffset = svpc;
|
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}
|
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else if (! (optyp >= TDB && optyp <= TDW))
|
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errorc (E_DIS);
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else { /* Have another line of body */
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if (!strucprev) {
|
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/* Make first node */
|
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strucprev = nodecreate ();
|
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recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody->
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duptype.dupnext.dup = strucprev;
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}
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else {
|
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strucprev->itemlst = nodecreate ();
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strucprev = strucprev->itemlst;
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}
|
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recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody->itemcnt++;
|
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/* Add new data line to STRUC */
|
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datadefine ();
|
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strucprev->decltype = optyp;
|
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}
|
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}
|
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if (generate) {
|
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if (!ISTERM (skipblanks()))
|
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errorc (E_ECL);
|
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}
|
|
listline ();
|
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}
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|
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struct srec {
|
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struct duprec FARSYM *curfld;
|
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USHORT curlen;
|
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};
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|
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|
|
/*** createduprec - create short data record with null data
|
|
*
|
|
* createduprec ();
|
|
*
|
|
* Entry
|
|
* Exit
|
|
* Returns
|
|
* Calls
|
|
*/
|
|
|
|
|
|
struct duprec FARSYM * PASCAL CODESIZE
|
|
createduprec ()
|
|
{
|
|
register struct duprec FARSYM *newrec;
|
|
|
|
newrec = (struct duprec FARSYM *)falloc (sizeof (*newrec), "createduprec");
|
|
newrec->rptcnt = 1;
|
|
/* Not a DUP */
|
|
newrec->itemcnt = 0;
|
|
newrec->itemlst = NULL;
|
|
newrec->dupkind = ITEM;
|
|
/* this also clears ddata and dup in other variants of struc */
|
|
newrec->duptype.duplong.ldata = NULL;
|
|
newrec->duptype.duplong.llen = 1;
|
|
return (newrec);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*** strucerror - generate structure error message
|
|
*
|
|
* strucerror ();
|
|
*
|
|
* Entry
|
|
* Exit
|
|
* Returns
|
|
* Calls
|
|
*/
|
|
|
|
|
|
struct duprec FARSYM * PASCAL CODESIZE
|
|
strucerror (
|
|
SHORT code,
|
|
struct duprec FARSYM *node
|
|
){
|
|
errorc (code);
|
|
/* Get rid of bad Oitem */
|
|
oblitdup (node);
|
|
/* Make up a dummy */
|
|
return (createduprec ());
|
|
}
|
|
|
|
|
|
|
|
|
|
/*** strucfill - fill in structure values
|
|
*
|
|
* strucfill ();
|
|
*
|
|
* Entry
|
|
* Exit
|
|
* Returns
|
|
* Calls
|
|
*/
|
|
|
|
|
|
VOID PASCAL CODESIZE
|
|
strucfill ()
|
|
{
|
|
register struct duprec FARSYM *pOver;
|
|
register struct duprec FARSYM *pInit;
|
|
register char *cp;
|
|
char svop;
|
|
short i, cbCur;
|
|
struct datarec drT;
|
|
|
|
|
|
if (!pDUPCur) {
|
|
errorc (E_MVD);
|
|
return;
|
|
}
|
|
|
|
if (skipblanks() == ',' || PEEKC() == '>') {
|
|
/* use default values */
|
|
pOver = createduprec ();
|
|
}
|
|
else {
|
|
/* Save operation type */
|
|
svop = optyp;
|
|
/* Original directive type */
|
|
optyp = pDUPCur->decltype;
|
|
|
|
pOver = datascan (&drT); /* Get item */
|
|
|
|
optyp = svop;
|
|
pInit = pDUPCur->duptype.dupnext.dup;
|
|
cbCur = pInit->duptype.duplong.llen;
|
|
|
|
if (pOver->dupkind == NEST)
|
|
/* Bad override val */
|
|
pOver = strucerror (E_ODI, pOver);
|
|
|
|
else if (pDUPCur->itemcnt != 1 || pInit->itemcnt)
|
|
/* Can't override field */
|
|
pOver = strucerror (E_FCO, pOver);
|
|
|
|
else if (pOver->dupkind != pInit->dupkind) {
|
|
|
|
if (pInit->dupkind == ITEM)
|
|
cbCur = pInit->duptype.dupitem.ddata->dsckind.opnd.dsize;
|
|
}
|
|
|
|
if (pOver->dupkind == LONG) {
|
|
/* If too long, truncate */
|
|
|
|
if ((i = pOver->duptype.duplong.llen) < cbCur) {
|
|
|
|
/* Space fill short (after reallocating more space) */
|
|
|
|
if (!(pOver->duptype.duplong.ldata =
|
|
realloc (pOver->duptype.duplong.ldata, cbCur)))
|
|
memerror("strucfil");
|
|
|
|
cp = pOver->duptype.duplong.ldata + i;
|
|
|
|
for (; i < cbCur; i++)
|
|
*cp++ = ' ';
|
|
}
|
|
else if (pOver->duptype.duplong.llen > cbCur)
|
|
errorc (E_OWL);
|
|
|
|
pOver->duptype.duplong.llen = (unsigned char)cbCur;
|
|
}
|
|
if ((pOver->dupkind == pInit->dupkind) &&
|
|
(pOver->dupkind == ITEM) && !errorcode)
|
|
|
|
pOver->duptype.dupitem.ddata->dsckind.opnd.dsize =
|
|
pInit->duptype.dupitem.ddata->dsckind.opnd.dsize;
|
|
}
|
|
pDUPCur = pDUPCur->itemlst;
|
|
|
|
if (strucoveride)
|
|
strclastover->itemlst = pOver;
|
|
else
|
|
strucoveride = pOver;
|
|
|
|
strclastover = pOver;
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*** strucparse - parse structure specification
|
|
*
|
|
* strucparse ();
|
|
*
|
|
* Entry
|
|
* Exit
|
|
* Returns
|
|
* Calls
|
|
*/
|
|
|
|
|
|
struct duprec FARSYM * PASCAL CODESIZE
|
|
strucparse ()
|
|
{
|
|
/* No items yet */
|
|
strucoveride = NULL;
|
|
recptr = symptr;
|
|
|
|
if (skipblanks () != '<')
|
|
error (E_EXP,"<");
|
|
|
|
/* 1st default field */
|
|
pDUPCur = recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody->duptype.dupnext.dup;
|
|
initflag = FALSE;
|
|
strucflag = FALSE;
|
|
/* Build list of overrides */
|
|
do {
|
|
SKIPC ();
|
|
strucfill ();
|
|
|
|
} while (skipblanks () == ',');
|
|
|
|
initflag = TRUE;
|
|
strucflag = TRUE;
|
|
while (pDUPCur) {/* Fill rest with overrides */
|
|
/* Make dummy entry */
|
|
strclastover->itemlst = createduprec ();
|
|
strclastover = strclastover->itemlst;
|
|
/* Advance to next field */
|
|
pDUPCur = pDUPCur->itemlst;
|
|
}
|
|
if (PEEKC () != '>')
|
|
error (E_EXP,">");
|
|
else
|
|
SKIPC ();
|
|
return (recptr->symu.rsmsym.rsmtype.rsmstruc.strucbody);
|
|
}
|
|
|
|
|
|
|
|
|
|
/*** strucinit - initialize structure
|
|
*
|
|
* strucinit ();
|
|
*
|
|
* Entry
|
|
* Exit
|
|
* Returns
|
|
* Calls
|
|
*/
|
|
|
|
|
|
VOID PASCAL CODESIZE
|
|
strucinit ()
|
|
{
|
|
initflag = TRUE;
|
|
strucflag = TRUE;
|
|
recptr = symptr;
|
|
optyp = TMACRO;
|
|
datadsize[TMACRO - TDB] = recptr->symtype;
|
|
datadefine ();
|
|
initflag = FALSE;
|
|
strucflag = FALSE;
|
|
}
|