/* asmdir.c -- microsoft 80x86 assembler
**
** microsoft (r) macro assembler
** copyright (c) microsoft corp 1986.  all rights reserved
**
** randy nevin
**
** 10/90 - Quick conversion to 32 bit by Jeff Spencer
*/

#include <stdio.h>
#include "asm86.h"
#include "asmfcn.h"
#include <fcntl.h>
#include <errno.h>
#include <string.h>

#ifndef XENIX286
#include <share.h>
#include <io.h>
#endif

#include "asmctype.h"
#include "asmindex.h"
#include "asmmsg.h"

extern PFPOSTRUCT  pFpoHead;
extern PFPOSTRUCT  pFpoTail;
extern unsigned long numFpoRecords;

SHORT CODESIZE fetLang(void);
int PASCAL CODESIZE trypathname PARMS((char *));
int PASCAL CODESIZE openincfile PARMS(( void ));
VOID PASCAL CODESIZE creatPubName (void);
extern char *siznm[];

/***    setsymbol - set attribute in symbol
 *
 *      setsymbol (bit);
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
setsymbol (
        UCHAR   bit
){
        /* Scan symbol name */

        if (getatom ()) {
            if (!symsrch ())
                errorn (E_SND);

            symptr->attr |= bit;
        }
}




/***    publicitem - scan symbol and make PUBLIC
 *
 *      publicitem ();
 *
 *      Entry   naim = symbol name
 *      Exit    Global attribute set in symbol entry
 *      Returns none
 *      Calls   error, scanatom, symsearch
 */


VOID PASCAL CODESIZE
publicitem(
){
        static char newAttr;

        if (getatom ()) {

            newAttr = NULL;
            if (fetLang() == CLANG)
                newAttr = M_CDECL;

            if (!symsrch ()) {

                /* define forward refernced name, so global attribute
                 * is available on the end of pass 1 */

                symcreate ( (UCHAR)(M_GLOBAL | newAttr), (UCHAR)PROC);
            }
            else {
                symptr->attr |= newAttr;

                /*  public is legal for an alias if target ok */
                if (symptr->symkind == EQU &&
                    symptr->symu.equ.equtyp == ALIAS)
                        if (! (symptr = chasealias (symptr))){
                            errorc(E_TUL);
                            return;
                        }

                if (pass2) {    /* catch forward reference symbol errors */

                    if (! (symptr->attr & M_GLOBAL))
                        errorn (E_IFR);

                    else if ((symptr->attr&~M_CDECL) == M_GLOBAL ||
                        !(symptr->attr & M_DEFINED))
                        errorn (E_SND);

                }

                switch (symptr->symkind) {
                    case PROC:
                    case DVAR:
                    case CLABEL:
                            if (M_XTERN & symptr->attr)
                                errorc (E_SAE);
                            break;
                    case EQU:
                            if (symptr->symu.equ.equtyp != EXPR)
                               errorc (E_TUL);
                            break;
                    default:
                            errorc (E_TUL);
                }
            }
            creatPubName();
        }
}


VOID PASCAL CODESIZE
creatPubName (
){
            symptr->attr |= M_GLOBAL;

            if (caseflag == CASEX && symptr->lcnamp == NULL)
                   symptr->lcnamp =
#ifdef M8086
                                    creatlname (naim.pszLowerCase);
#else
                                    createname (naim.pszLowerCase);
#endif
}


/***    xcrefitem - scan symbol and xcref it
 *
 *      xcrefitem ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
xcrefitem ()
{
        if (pass2 && !loption) {
                setsymbol (M_NOCREF);
                creftype = CREFEND;
                }
        else
                getatom ();
}




/***    externflag -
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
externflag (
        register UCHAR   kind,
        register UCHAR   new
){
        switchname ();
        /* Make name be extern name */
        if (!new) {
                /* Create symbol */
                symcreate (M_XTERN | M_DEFINED,
                           (UCHAR)((kind == CLABEL)? DVAR: kind));

                symptr->symkind = kind;

                if (caseflag == CASEX)
                        symptr->lcnamp =
#ifdef M8086
                                creatlname (naim.pszLowerCase);
#else
                                createname (naim.pszLowerCase);
#endif /* M8086 */
                symptr->symtype = varsize;
                symptr->length = 1;
                if (kind == EQU)
                        /* expr type EQU is constant */
                        symptr->symu.equ.equtyp = EXPR;
                else
                        symptr->symsegptr = pcsegment;

                if (pass2)
                        emitextern (symptr);
        }
        checkRes();
        crefdef ();
        if (! (M_XTERN & symptr->attr))
                errorc (E_ALD);
        else  {
                if (kind != symptr->symkind || symptr->symtype != varsize ||
                    (symptr->length != 1 && kind != EQU) &&
                    (symptr->symsegptr != pcsegment &&
                     !(fSimpleSeg && varsize == CSFAR)))

                        errorn (E_SDK);
                else {
                        symptr->attr |= M_XTERN | M_BACKREF;

                        if (fSimpleSeg && varsize == CSFAR){
                            symptr->symsegptr = NULL;
                        }
                        else if (varsize == CSNEAR ||
                                (varsize == CSFAR && pcsegment))

                            symptr->symu.clabel.csassume = regsegment[CSSEG];

                }
        }
}





/***    externitem -
 *
 *      externitem ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */

VOID PASCAL CODESIZE
externitem ()
{
        register char new;
        char newAttr;

        /* Get name of external */

        if (getatom ()) {

            newAttr = NULL;
            if (fetLang() == CLANG)
                newAttr = M_CDECL;

            new = symFetNoXref ();
            switchname ();          /* Save name of external */

            if (NEXTC () != ':')
               errorc (E_SYN);

            else {
                /* Scan name of extern type */
                getatom ();

                if (tokenIS("abs")) {

                    equsel = EXPR;
                    varsize = 0;
                    externflag (EQU, new);
                }
                else if (!fnsize ())
                    errorc (E_UST);

                else    {
                    if (varsize >= CSFAR) {
                        /* NEAR | FAR */
                        externflag (CLABEL, new);
                    }

                    else    /* data reference */

                        externflag (DVAR, new);

                }
                symptr->attr |= newAttr;
            }
        }
}




/***    segcreate - create and initialize segment
 *
 *      segcreate (makeseg);
 *
 *      Entry   makeseg = TRUE if segement is to be make
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
segcreate (
        register UCHAR   makeseg
){

        if (pass2) /* Segment must be defined */
                errorn (E_PS1);

        if (makeseg)
                symcreate (0, SEGMENT);
        else
                symptr->symkind = SEGMENT;

        /* Initialize segment data */
        symptr->symu.segmnt.align = -1;
        symptr->symu.segmnt.use32 = -1;
        symptr->symu.segmnt.combine = 7;
}




/***    addglist - add segment to group list
 *
 *      addglist ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
addglist ()
{
        register SYMBOL FARSYM *p, FARSYM *pSY;

        p = symptr;

        if (pass2)
            if (!(M_DEFINED & p->attr))
                errorn (E_PS1);

        /* Can get segment in 2 group lists unless check
         * symptr->grouptr == curgroup */

        if (p->symu.segmnt.grouptr) {
            if (p->symu.segmnt.grouptr != curgroup)
                /* Trying to put in 2 groups */
                errorc (E_SPC);
                return;
        }
        p->symu.segmnt.grouptr = curgroup;
        pSY = curgroup->symu.grupe.segptr;

        if (!pSY)
            curgroup->symu.grupe.segptr = p;

        else {

            /* scan the list of segments on the group */

            do {
               if (pSY == p)          /* already on list */
                  return;

            } while (pSY->symu.segmnt.nxtseg &&
                     (pSY = pSY->symu.segmnt.nxtseg));

            /* Link into list */
            pSY->symu.segmnt.nxtseg = p;
        }
}




/***    groupitem -
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
groupitem ()
{

        if (!getatom ())
                error (E_EXP,"segment name");

        else if (!fnoper ()) {

                /* Have a segment name */

                if (!symFet())
                        /* Forward segment, make it */
                        segcreate (TRUE);

                /* If not segment, could be class so make undef */
                if (symptr->symkind != SEGMENT)

                        /* If a class, consider undef instead of wrong kind */
                        errorn ((USHORT)((symptr->symkind == CLASS) && !pass2 ?
                                E_IFR : E_SDK));

                else if (symptr->attr & M_DEFINED || !pass2) {
                        if (curgroup)
                                addglist ();
                }
                else
                        errorn (E_PS1);
        }
        else {                  /* Have error or SEG <sym> */
                if (opertype != OPSEG)
                        /* Symbol can't be reserved */
                        errorn (E_RES);
                else {
                        /* Have SEG <var> | <label> */
                        getatom ();
                        if (*naim.pszName == 0)
                                error (E_EXP,"variable or label");

                        else if (!symFet())
                                /* Forward reference bad */
                                errorc (E_IFR);

                        else if (1 << symptr->symkind &
                                  (M_DVAR | M_CLABEL | M_PROC)) {
                                /* Segment of variable */

                                symptr = symptr->symsegptr;
                                if (!symptr)
                                        /* Must have segment */
                                        errorc (E_OSG);
                                else
                                        addglist ();
                        }
                        else
                                /* Wrong type */
                                errorc (E_TUL);
                }
        }
}




/***    groupdefine - define segments that form a group
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
groupdefine ()
{
        if (symFet()) {     /* Symbol exists */
                checkRes();
                if (symptr->symkind != GROUP)
                        /* Should have been group */
                        errorc (E_NGR);

                symptr->attr |= M_BACKREF;
        }
        else if (pass2)
                /* Must be seen 1st on pass 1 */
                errorn (E_PS1);
        else {
                /* Create group name */
                symcreate (M_DEFINED, GROUP);
        }

        /* CURgroup is used by GROUPitem to know which group segment
           name should be added to. If it is NIL, means that either
           it is pass 2 so list already made or there was an error in
           GROUP name */

        curgroup = NULL;

        if (! pass2){              /* Don't make list if pass 2 */

                symptr->attr |= M_BACKREF | M_DEFINED;

                if (symptr->symkind == GROUP)
                    curgroup = symptr;
        }
        /* Handle segment list */
        BACKC ();
        do {
                SKIPC ();
                groupitem ();
        } while (PEEKC () == ',');
}




/***    setsegment -
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
setsegment ()
{
        if (pass2 && !(M_DEFINED & symptr->attr))
                /* undef */
                errorn (E_SND);
        else
                regsegment[lastsegptr->offset] = symptr;
}




/***    assumeitem -
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 *      Note    Form of ASSUME item is:
 *              <segreg> : <group> | <segment> | SEG <var> | NOTHING
 *         Will set XXsegment to segment or group pointer. NOTHING
 *         will set to NIL
 */


VOID PASCAL CODESIZE
assumeitem ()
{
        register SYMBOL FARSYM *p;
        register short   j;
//        int segIndex;

        /* Scan segment name */
        getatom ();
        if (PEEKC() != ':') {
            /* NOTHING or error */
            if (fnoper ())

                if (opertype == OPNOTHING) { /* No segments assumed*/

                    memset(regsegment, 0, sizeof(regsegment));
                }
                else
                        /* Must have colon */
                    error (E_EXP,"colon");
            else
                    /* Must have colon */
                error (E_EXP,"colon");
        }
        else if (!symsearch ())         /* get seg register - Must be defined */
                errorn (E_SND);
        else {
            lastsegptr = p = symptr;             /* At least have defined */

            if (p->symkind != REGISTER ||
                p->symu.regsym.regtype != SEGREG)
                    errorn (E_MBR);

            else {          /* Have segment reg so go on */
                /* Save ptr to segment */
                SKIPC ();
                getatom ();
                if (*naim.pszName == 0)
                        error (E_EXP,"segment, group, or NOTHING");
                else
                if (!fnoper ()) {

                    /* Must be segment or group */

                    if (!symFet ())
                       segcreate (TRUE);   /* Make if not found */

                    p = symptr;
                    if (p->symkind == SEGMENT ||
                        p->symkind == GROUP) {

                        setsegment ();
#ifndef FEATURE
                        if (tokenIS("flat") && (cputype&P386)) {
                            pFlatGroup = symptr;
                            pFlatGroup->symkind = GROUP;
                            pFlatGroup->attr |= M_DEFINED | M_BACKREF;
                            pFlatGroup->symu.grupe.segptr = NULL;
                        }
#endif
                    } else
                            errorc (E_MSG);
                }
                else {
                    /* Have NOTHING or SEG */
                    if (opertype == OPNOTHING) {
                        regsegment[lastsegptr->offset] = NULL;
                    }
                    else if (opertype == OPSEG) {
                        getatom ();
                        if (!symFet ())
                                /* Must be defined on pass 1 */
                                errorn (E_PS1);
                        else {
                                p = symptr;
                                if (!(M_DEFINED & p->attr))
                                        errorn (E_PS1);
                                else if (1 << p->symkind &
                                     (M_CLABEL | M_PROC | M_DVAR)) {
                                        if (!(M_XTERN & p->attr))
                                                symptr = symptr->symsegptr;
                                        p = symptr;
                                        setsegment ();
                                }
                                else
                                        errorc (E_TUL);
                        }
                    }
                    else
                        errorn (E_RES);
                }
            }
        }
}




/***    evendir - process <even> directive
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
evendir (
        SHORT arg
){
        register SHORT size;

        if (arg)
                size = arg;
        else
                size = exprconst ();

        if ((size & (size - 1)) != 0 || !size)
                errorc(E_AP2);

        else if (!pcsegment)
                /* Not in segment */
                errorc (E_MSB);

        else if (pcsegment->symu.segmnt.align == 1)
                /* Byte aligned */
                errorc (E_NEB);

        else {
            if (!((USHORT) pcoffset % size))
                return;

            size = size - (USHORT) pcoffset % size;

            while (size--)

                if (!pcsegment->symu.segmnt.hascode)

                    emitopcode(0);
                else
                    if (size > 0){
                        size--;
                        emitopcode(0x87);       /* two byte form is faster */
                        emitopcode(0xDB);
                    }
                    else
                        emitopcode(0x90);
        }
}




/***    namedir - process <name> directive
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
namedir ()
{
        getatom ();
        if (*naim.pszName == 0)
                error (E_EXP,"module name");
        else if (modulename)
                /* Already have one */
                errorc (E_RSY);
        else
                modulename = createname (naim.pszName);
}

/***    includeLib - process include lib directive
 *
 *      Format : includeLib token
 */


VOID PASCAL CODESIZE
includeLib()
{
        char *pFirst;
        TEXTSTR FAR *bodyline, FAR *ptr;
        register USHORT siz;

        pFirst = lbufp;

        while (!ISTERM (PEEKC()) && !ISBLANK (PEEKC()))
            SKIPC();

        siz = lbufp - pFirst;

        if (siz == 0 || siz > 126)
            errorc(E_IIS);

        if (pass2)
            return;

        bodyline = (TEXTSTR FAR *)talloc ((USHORT)(sizeof (TEXTSTR) + siz));

        bodyline->strnext = (TEXTSTR FAR *)NULL;
        bodyline->text[siz] = NULL;

        fMemcpy (bodyline->text, pFirst, siz);

        if (!(ptr = pLib))
                pLib = bodyline;
        else {
                while (ptr->strnext)
                        ptr = ptr->strnext;

                ptr->strnext = bodyline;
        }
}



/***    orgdir - process <org> directive
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
orgdir ()
{
        register DSCREC *dsc;

        dsc = expreval (&nilseg);
        if (dsc->dsckind.opnd.dflag == FORREF)
                /* Must be known */
                errorc (E_PS1);
        /*    Can get <code> set and segment NIL, fix */
        else if (dsc->dsckind.opnd.dsegment) {/* code var */

                if (!isdirect(&(dsc->dsckind.opnd)) &&
                    dsc->dsckind.opnd.mode != 4)

                        /* Not direct */
                        errorc (E_IOT);
                if (pcsegment != dsc->dsckind.opnd.dsegment)
                        /* Different segment */
                        errorc (E_NIP);
        }
        else {          /* Should be const */
                /* Must be constant */
                forceimmed (dsc);
                if (dsc->dsckind.opnd.dsign)
                        /* And plus */
                        errorc (E_VOR);
        }
        if (dsc->dsckind.opnd.doffset < pcoffset)
                if (pcmax < pcoffset)
                        /* If moving down, save */
                        pcmax = pcoffset;
        /* Set new PC */
        pcoffset = dsc->dsckind.opnd.doffset;
        /* Display new PC */
        pcdisplay ();
        dfree ((char *)dsc );
}




/***    purgemacro - process <purge> directive
 *
 *      purgemacro ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
purgemacro ()
{
        getatom ();
        if (!symFet ())
                errorn (E_SND);

        else if (symptr->symkind != MACRO)
                 symptr->attr &= ~(M_BACKREF);
        else {
                if (symptr->symu.rsmsym.rsmtype.rsmmac.active)
                        symptr->symu.rsmsym.rsmtype.rsmmac.delete = TRUE;
                else
                        deletemacro (symptr);
        }
}


/***    deletemacro - delete macro body
 *
 *      deletemacro (p);
 *
 *      Entry   p = pointer to macro symbol entry
 *      Exit    macro body deleted
 *      Returns none
 *      Calls
 */


VOID PASCAL CODESIZE
deletemacro (p)
SYMBOL FARSYM *p;
{
        listfree (p->symu.rsmsym.rsmtype.rsmmac.macrotext);
        p->symu.rsmsym.rsmtype.rsmmac.macrotext = NULL;
        p->symu.rsmsym.rsmtype.rsmmac.active = 0;
        p->symu.rsmsym.rsmtype.rsmmac.delete = FALSE;
}



/***    radixdir - process <radix> directive
 *
 *      radixdir ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
radixdir ()
{
        register USHORT  rdx;

        /* Force decimal radix */
        radixescape = TRUE;
        /* Get wanted radix */
        rdx = exprconst ();
        if (2 <= rdx && rdx <= 16)
                radix = rdx;
        else
                errorc (E_VOR);
        radixescape = FALSE;
        /* Convert radix to ascii and display */
        offsetAscii ((OFFSET) radix);
        copyascii ();
}




/***    checkline - check line for delimiter
 *
 *      flag = checkline (cc);
 *
 *      Entry   cc = chearacter to check line for
 *      Exit    none
 *      Returns TRUE if cc matched in line
 *              FALSE if cc not matched in line
 *      Calls   none
 */


UCHAR   PASCAL CODESIZE
checkline (
        register UCHAR cc
){
        register UCHAR nc;

        while (nc = NEXTC())
                if (nc == cc)
                        return (TRUE);
        BACKC ();
        return (FALSE);
}




/***    comment - copy characters to end of comment
 *
 *      commentbuild ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
commentbuild ()
{
        if (checkline ((char)delim)) {
                handler = HPARSE;
                swaphandler = TRUE;
        }

        if (!lsting) {
            linebuffer[0] = '\0';
            linelength = 0;
            lbufp = linebuffer;
        }

        listline ();
}




/***    comdir - process <comment> directive
 *
 *      comdir ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
comdir ()
{
        if (!PEEKC ())
                error (E_EXP,"comment delimiter");
        else {
                /* Save delim char */
                if (!checkline ((char)(delim =  NEXTC ()))) {
                        /* Delim is not on same line */
                        swaphandler = TRUE;
                        handler = HCOMMENT;
                }
        }
        if (!lsting) {
            linebuffer[0] = '\0';
            linelength = 0;
            lbufp = linebuffer;
        }
}




/***    outdir - display remainder of line to console
 *
 *      outdir ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
outdir ()
{
        if (!listquiet)
                fprintf (stdout, "%s\n", lbufp);
        lbufp = lbuf + strlen (lbuf);
}




/***    enddir - process <end> directive
 *
 *      enddir ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
enddir ()
{
        if (!ISTERM (PEEKC ())) {
                /* Have a start addr */
                startaddr = expreval (&nilseg);
                if (!(M_CODE & startaddr->dsckind.opnd.dtype))
                        errorc (E_ASC);
        }

  #ifdef BCBOPT
        if (fNotStored)
            storeline();
  #endif

        if (fSimpleSeg && pcsegment)
            endCurSeg();

        listline();
        longjmp(forceContext, 1);
}




/***    exitmdir - process <exitm> directive
 *
 *      exitmdir ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
exitmdir ()
{
        if (macrolevel == 0)
                /* Must be in macro */
                errorc (E_NMC);
        else
                /*  set ExitBody since need to see conditionals */
                exitbody = TRUE;
}




/***    trypathname - try to open a file in a directory
 *
 *      trypathname (szPath);
 *
 *      Entry   lbufp = pointer to include file name
 *              szPath = directory to search in
 *      Exit    Include file opened if found.
 *              Fully qualified name in "save"
 *      Returns file handle of file, or -1 if not opened
 *              special handle of -2 means FCB has been allocated
 *      Note    If include file name does not begin with path separator
 *              character, the path separator is appended to include path.
 */

int PASCAL CODESIZE
trypathname (
    char * szPath
){
    char           cc;
    int            fh;
    char           *p = save;
    char           *pe = save + LINEMAX - 2;
    char           *ic;
    register FCB * pFCBT;

    ic = szPath;

    if (*ic) {

        while (*ic && p < pe)
            *p++ = *ic++;

        if ((*(p-1) != PSEP) && (*(p-1) != ':'))
            /* include path separator if not in file name */
            *p++ = PSEP;
    }

    for(ic = lbufp; !ISTERM (cc = *ic++) && !ISBLANK (cc) && p < pe ; )

        if (cc == ALTPSEP)
            *p++ = PSEP;
        else
            *p++ = cc;

#ifdef MSDOS
    if (*(p-1) == ':') /* kill 'con:' */
        p--;
#endif
    *p = NULL;

    /* look for an existing include file on pass 2 with a fully qualified
     * name */

    #ifdef BCBOPT
    if (pass2) {
        for (pFCBT = pFCBInc->pFCBNext; pFCBT; pFCBT = pFCBT->pFCBNext) {

            if (!memcmp (save, pFCBT->fname, strlen(pFCBT->fname)+1)) {
                pFCBT->pbufCur = NULL;

                if (pFCBT->pBCBCur = pFCBT->pBCBFirst) {

                    pFCBT->pBCBCur->fInUse = 1;

                    if (! (pFCBT->pbufCur = pFCBT->pBCBCur->pbuf))
                        pFCBT->fh = tryOneFile( save );
                }
                else
                    pFCBT->fh = tryOneFile( save );

                pFCBCur = pFCBT;

                return(-2);
            }
        }
    }
    #endif
    return(tryOneFile( save ));
}

int PASCAL CODESIZE
tryOneFile(
    UCHAR *fname
){
    int iRet;
    int fTryAgain;

    do{
        fTryAgain = FALSE;
#ifdef XENIX286
        iRet = open (fname, TEXTREAD);
#else
        iRet = _sopen (fname, O_RDONLY | O_BINARY, SH_DENYWR);
#endif
        if( iRet == -1 && errno == EMFILE ){    /* If out of file handles */
            if( freeAFileHandle() ){
                fTryAgain = TRUE;    /* Keep trying until out of files to close */
            }
        }
    }while( fTryAgain );
    return( iRet );     /* Return file handle or error */
}



/***    openincfile - try to find and open include file
 *
 *      openincfile ()
 *
 *      Entry   lbufp = pointer to include file name
 *              inclcnt = count of -I paths from command line and INCLUDE e.v.
 *              inclpath[i] = pointer to path to prepend to include file name
 *      Exit    include file opened if found on any path or current directory
 *              Aborts with code EX_UINC if file not found
 *      Returns none
 *      Note    If include file name does not begin with path separator
 *              character, the path separator is appended to include path.
 *              For every attempt to find a file in a path, the alternate
 *              path separator character is used.  This will improve program
 *              portability between DOS and XENIX.
 */

int PASCAL CODESIZE
openincfile ()
{
    register char cc;
    int fh;
    SHORT i;

#ifdef MSDOS
    if ((cc = *lbufp) != PSEP && cc != ALTPSEP && cc != '.' &&
        lbufp[1] != ':') {
#else
    if ((cc = *lbufp) != PSEP && cc != ALTPSEP && cc != '.') {
#endif /* MSDOS */

        for (i = inclFirst; i < inclcnt; i++) {
            if ((fh = trypathname (inclpath[i])) != -1) {
                return (fh);
            }
        }

    } else

        if ((fh = trypathname ("")) != -1) {
            return (fh);
        }

    error(E_INC, lbufp);
    errordisplay ();
    closeOpenFiles();

    exit (EX_UINC);
}


/***    includedir - process <include> directive
 *
 *      includedir ();
 *
 *      Entry   lbufp = pointer to include file name
 *      Exit    Opens include file on pass1.  Gets correct buffers on pass 2
 *      Returns none
 *      Notes   Notice the GOTO when correct FCB found in pass2
 */

VOID PASCAL CODESIZE
includedir ()
{
    char lastreadT;
    register FCB * pFCBT;
    unsigned long filelen;
    FCB * svInc;
    int fh;


#ifdef BCBOPT
    if (fNotStored)
        storelinepb ();
#endif

    listline();

    /* Get here on pass 1 OR when file names didn't match */

#ifdef BCBOPT
    if ((fh = openincfile()) == -2){
        pFCBT = pFCBInc = pFCBCur;
        goto gotinclude;
    }
#else
    fh = openincfile();
#endif

    pFCBT = (FCB *)
      nalloc((USHORT)(sizeof(FCB) + strlen(save) + sizeof(char)),"includedir");

    pFCBT->fh = fh;

    strcpy (pFCBT->fname, save);    // Save the file name

    pFCBT->pFCBParent = pFCBCur;  /* Add bidirectional linked list entry */
    pFCBCur->pFCBChild = pFCBT;

#ifdef BCBOPT
    if (!pass2) {
        pFCBT->pFCBNext = NULL;
        pFCBInc->pFCBNext = pFCBT;
        pFCBInc = pFCBT;
    } else
        pFCBT->pbufCur = NULL;
#endif

    if ((filelen = _lseek(pFCBT->fh, 0L, 2 )) == -1L)
        TERMINATE1(ER_ULI, EX_UINP, save);

    /* go back to beginning */
    _lseek(pFCBT->fh, 0L, 0 );

    if (filelen > DEF_INCBUFSIZ << 10)
        pFCBT->cbbuf = DEF_INCBUFSIZ << 10;
    else
        pFCBT->cbbuf = (USHORT) filelen + 1;

    pFCBCur = pFCBT;

    /* get a buffer */

#ifdef BCBOPT
    if (fBuffering && !pass2)
        pFCBT->pBCBFirst = pBCBalloc(pFCBT->cbbuf);
    else
        pFCBT->pBCBFirst = NULL;

    pFCBT->pBCBCur = pFCBT->pBCBFirst;
#endif


gotinclude:

    pFCBT->line = 0;
    pFCBT->ctmpbuf = 0;
#ifdef XENIX286
    pFCBT->ptmpbuf = pFCBT->buf = nalloc(pFCBT->cbbuf, "incdir");
#else
    pFCBT->ptmpbuf = pFCBT->buf = falloc(pFCBT->cbbuf, "incdir");
#endif

    if (crefing && pass2)
            fprintf( crf.fil, "\t%s", save );

    lastreadT = lastreader;
    lineprocess(RREADSOURCE, NULL );

    lastreader = lastreadT;
    swaphandler++;                  /* sync local handler with global state */
    fSkipList++;
}




/***    segdefine - process <segment> directive
 *
 *      routine ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 *      Note    Format is:
 *              <name> SEGMENT [align] | [combine] | ['class']
 *                     align:  PARA | BYTE | WORD | PAGE | INPAGE
 *                     combine:PUBLIC | COMMON | STACK | MEMORY | AT <expr>
 */


VOID PASCAL CODESIZE
segdefine ()
{
        register char cc;
        register SYMBOL FARSYM *p;
        register SYMBOL FARSYM *pT;

        if (!symFetNoXref ())
                /* Create if new segment */
                segcreate (TRUE);
        else {
                if (symptr->symkind != SEGMENT)
                        if (symptr->symkind == CLASS)
                                segcreate (FALSE);
                        else
                                /* Wasn't segment */
                                errorn (E_SDK);
        }
        strcpy(&segName[8], naim.pszName);
        p = symptr;
        /* Output CREF info */
        crefdef ();
        if (p->symkind == SEGMENT){

                if (!(pass2 || (M_BACKREF & p->attr)))
                        addseglist (p);

                p->attr |= M_BACKREF | M_DEFINED;
                if (pcsegment) {

                        /* Save previous segment info */
                        /* Save current segment PC */
                        pcsegment->offset = pcoffset;
                        pcsegment->symu.segmnt.seglen =
                                (pcmax > pcoffset) ? pcmax : pcoffset;
                }
                /* check for nested segment opens */

                for (pT = pcsegment; pT;) {

                    if (pT == p){
                        errorc(E_BNE);
                        goto badNest;
                    }
                    pT = pT->symu.segmnt.lastseg;
                }

                /* Save previous segment */
                p->symu.segmnt.lastseg = pcsegment;
badNest:
                /* Set new current segment  */
                pcsegment = p;
                pcoffset = p->offset;

                /* Set segment maximum offset */
                pcmax = p->symu.segmnt.seglen;

                /* Display where in segment */
                pcdisplay ();

                while (!ISTERM (cc = PEEKC ())) {
                        if (cc == '\'')
                                segclass (p);
                        else if  (LEGAL1ST (cc))
                                segalign (p);
                        else  {
                                error(E_EXP,"align, combine, or 'class'");
                                break;
                        }
                }
#ifdef V386
                if (p->symu.segmnt.use32 == (char)-1)
                        p->symu.segmnt.use32 = wordszdefault;

                wordsize = p->symu.segmnt.use32;

                defwordsize();

                if (wordsize == 4 && !(cputype & P386))
                        errorc(E_CPU);
#endif
            }
            definesym(segName);
            symptr->attr |= M_NOCREF;   /* don't cref @curSeg */
}




/***    addseglist - add segment to list
 *
 *      addseglist (pseg);
 *
 *      Entry   pseg = segment symbol entry
 *      Exit
 *      Returns
 *      Calls
 */


VOID PASCAL CODESIZE
addseglist (
register SYMBOL FARSYM *pseg
){
        register SYMBOL FARSYM  *tseg;
        register SYMBOL FARSYM * FARSYM *lseg;

        /* Add segment to list */
        if (!firstsegment) {
                firstsegment = pseg;
                pseg->symu.segmnt.segordered = NULL;
                return;
        }
        tseg = firstsegment;
        lseg = &firstsegment;
        for (; tseg; lseg = &(tseg->symu.segmnt.segordered),
                                        tseg = tseg->symu.segmnt.segordered) {
                if (segalpha) {
                        if (STRFFCMP (pseg->nampnt->id, tseg->nampnt->id) < 0) {
                                pseg->symu.segmnt.segordered = tseg;
                                *lseg = pseg;
                                return;
                        }
                }
        }
        *lseg = pseg;
        pseg->symu.segmnt.segordered = NULL;
}



/***    segclass - process <segment> 'class' subdirective
 *
 *      segclass (pseg);
 *
 *      Entry   pseg = segment symbol entry
 *              *lbufp = leading ' of class name
 *      Exit
 *      Returns
 *      Calls   scanatom, skipblanks
 *      Note    Format is:
 *              <name> SEGMENT [align] | [combine] | ['class']
 *                     align:  PARA | BYTE | WORD | PAGE | INPAGE
 *                     combine:PUBLIC | COMMON | STACK | MEMORY | AT <expr>
 */


VOID PASCAL CODESIZE
segclass (
        register SYMBOL FARSYM *pseg
){
        SKIPC ();
        getatom ();
        if (NEXTC () != '\'')
                /* Don't have right delim */
                error (E_EXP,"'");
        skipblanks ();
        if (symptr->symu.segmnt.classptr) {
                /* Make sure 'class' matches */
                if (!symFet ())
                        /* Not same class */
                        errorc (E_SPC);
                else if (symptr->symkind != CLASS &&
                         symptr->symkind != SEGMENT &&
                         symptr->symkind != GROUP)
                        errorn(E_SDK);
                else if (symptr != pseg->symu.segmnt.classptr)
                        errorc (E_SPC);
        }
        else if (*naim.pszName == 0)
                errorc (E_EMS);

        else if (!symFet ()) {
                symcreate (M_DEFINED, SEGMENT);
                symptr->symkind = CLASS;
        }
        checkRes();
        pseg->symu.segmnt.classptr = symptr;
}




/***    segalign - process <segment> align and combine subdirectives
 *
 *      segalign ();
 *
 *      Entry
 *      Exit
 *      Returns
 *      Calls
 *      Note    Format is:
 *              <name> SEGMENT [align] | [combine] | [16/32] | ['class']
 *                     align:  PARA | BYTE | WORD | PAGE | INPAGE
 *                     combine:PUBLIC | COMMON | STACK | MEMORY | AT <expr>
 *                     16/32:  USE16 | USE32
 */


VOID PASCAL CODESIZE
segalign (
        register SYMBOL FARSYM *pseg
){
        /* Scan align or combine type */
        getatom ();
        if (fnspar ())
                switch(segidx)
                {
                case IS_BYTE:
                case IS_WORD:
#ifdef V386
                case IS_DWORD:
#endif
                case IS_PAGE:
                case IS_PARA:
                        /* Some align field */
                        if (pseg->symu.segmnt.align == (char)-1)
                                pseg->symu.segmnt.align = segtyp;
                        else if (pseg->symu.segmnt.align != segtyp &&
                            (pseg->symu.segmnt.align != pseg->symu.segmnt.combine ||
                            pseg->symu.segmnt.align))
                                errorc (E_SPC);
                        break;
                case IS_MEMORY:
                case IS_PUBLIC:
                case IS_STACK:
                case IS_COMMON:
                        if (pseg->symu.segmnt.combine == 7)
                                pseg->symu.segmnt.combine = segtyp;
                        else if (pseg->symu.segmnt.combine != segtyp)
                                errorc (E_SPC);
                        break;
#ifdef V386
                case IS_USE16:
                        if (pseg->symu.segmnt.use32 != (char)-1 &&
                            pseg->symu.segmnt.use32 != 2)
                                errorc (E_SPC);
                        if ((cputype&P386)==0)
                                errorc (E_NPA);
                        pseg->symu.segmnt.use32 = 2;
                        break;
                case IS_USE32:
                        if (pseg->symu.segmnt.use32 != (char)-1 &&
                            pseg->symu.segmnt.use32 != 4)
                                errorc (E_SPC);
                        if ((cputype&P386)==0)
                                errorc (E_NPA);
                        pseg->symu.segmnt.use32 = 4;
                        break;
#endif
                default:
                        /* Have AT <expr> */
                        pseg->symu.segmnt.locate = exprconst ();
                        pseg->symu.segmnt.align = 0;
                        pseg->symu.segmnt.combine = 0;
                }
        else {
                /* Not good align or define */
                errorc (E_NPA);
        }
}


/***    procdefine - start procedure block
 *
 *      procdefine ();
 *
 *      Parse the proc statement with optional distance parameters
 */

SYMBOL FARSYM *pArgFirst;       /* pointer to first argument */
SYMBOL FARSYM *pArgCur;         /* pointer to currect argment */
OFFSET offsetCur;               /* current stack offset */
char bp16 [] =" PTR [BP]?";     /* template for text macro creation */
char bp32 [] =" PTR [EBP]?";
char *bp;

VOID     PASCAL CODESIZE
procdefine ()
{
        /* create PROC name with default size*/

        varsize = dirsize[I_PROC];
        switchname();

        if (getatom ()){

            if (fnsize ()){            /* process optional near|far */

                if (varsize < CSFAR)
                    errorc (E_TIL);

                if (langType)
                    getatom();
            }
            else if (!langType)
                errorc (E_MSY);

        }
        switchname();

        labelcreate (varsize, PROC);

        if (symptr->symkind != PROC)
            return;

        /* Set previous PROC, make sure no loop possible */

        if (iProcStack < PROCMAX && pcproc != symptr)
                procStack[++iProcStack] = symptr;

        pcproc = symptr;  /* Set ptr to new PROC */
        symptr->length = 1;
        symptr->symu.clabel.type = typeFet(varsize);
        pcproc->symu.plabel.pArgs = NULL;

        if (langType)

            creatPubName();
        else
            return;

        if (iProcStack > 1)           /* nested procs not allowed */
            errorc(E_BNE);

        iProcCur = ++iProc;
        emitline();

        if (! pass2) {

            /* keep a chain of procedures in sorted order so we can output
             * proc's in the correct order for CV */

            if (pProcCur)
                pProcCur->alpha = symptr;
            else
                pProcFirst = symptr;
        }
        pProcCur = symptr;

        /* check and process any "uses reg1 reg2 ... " */

        iRegSave = -1;
        fProcArgs = ARGS_NONE;
        cbProcLocals = 0;
        switchname();

        if (fetLang() == CLANG)
            pProcCur->attr |= M_CDECL;

#ifndef FEATURE
        if (tokenIS("private")) {
            symptr->attr &=  ~M_GLOBAL;
            getatom();
        }
#endif

        if (tokenIS("uses")){

            char count = 0;

            while(iRegSave < 8 && getatom()){

                count++;

#ifndef FEATURE
                if (symsrch() && symptr->symkind == EQU
                  && symptr->symu.equ.equtyp == TEXTMACRO){
                    expandTM (symptr->symu.equ.equrec.txtmacro.equtext);
                    getatom ();
                }

                if (*naim.pszName)
#endif
                    strcpy(regSave[++iRegSave], naim.pszName);
            }
            if (!count)
                errorc(E_OPN);
            else
                fProcArgs = ARGS_REG;
        }

        pTextEnd = (char *) -1;
        bp = (wordsize == 2)? bp16: bp32;

        offsetCur = wordsize*2;     /* room for [e]bp and offset of ret addr */
        if (pcproc->symtype == CSFAR)
            offsetCur += wordsize;  /* room for [ ]cs (16 or 32 bits) */

        cbProcParms = - offsetCur;

        scanArgs();

        cbProcParms += offsetCur;
        if (cbProcParms)
            fProcArgs = ARGS_PARMS;

        pcproc->symu.plabel.pArgs = pArgFirst;
        offsetCur = 0;
}

/***    defineLocals
 *
 *      Parse the local statment for stack based variables
 */

VOID PASCAL CODESIZE
defineLocals ()
{
        /* check for valid active proc */

        if (!pcproc || fProcArgs < 0)
            return;

        fProcArgs = ARGS_LOCALS;
        getatom();
        scanArgs();

        /* tack on the the end the parm list any locals */

        addLocal(pArgFirst);

        cbProcLocals = offsetCur;
}

/***  addLocal - concatenate a null-terminated list of locals onto a proc
 *
 */

VOID PASCAL CODESIZE
addLocal (
        SYMBOL FARSYM *pSY
){
        if (pcproc) {

            if (!(pArgCur = pcproc->symu.plabel.pArgs))
                pcproc->symu.plabel.pArgs = pSY;

            else {

                for(; pArgCur->alpha; pArgCur = pArgCur->alpha);

                pArgCur->alpha = pSY;
            }
        }
}



char *  PASCAL CODESIZE
xxradixconvert (
        OFFSET  valu,
        register char *p
){
        if (valu / radix) {
                p = xxradixconvert (valu / radix, p);
                valu = valu % radix;
        }
        else /* leading digit */
                if (valu > 9) /* do leading '0' for hex */
                        *p++ = '0';

        *p++ = valu + ((valu > 9)? 'A' - 10 : '0');

        return (p);
}

SHORT     mpTypeAlign[] = {  4, 1, 2, 4 };


/***    scanArgs - process an argument list into text macros
 *
 *
 */


SHORT     PASCAL CODESIZE
scanArgs ()
{
    struct eqar eqarT;
    USHORT defKind;
    USHORT defType;
    USHORT defCV;
    USHORT defPtrSize;
    SHORT  fIsPtr;
    char  *pLeftBrack;
    char  *p;

    pArgFirst = pArgCur = NULL;

    if (*naim.pszName)
        goto First;

    do {
        if (PEEKC() == ',')
            SKIPC();

        if (!getatom())
            break;
First:
        switchname();
        if (!createequ (TEXTMACRO))
            break;

        /* chain in the text macro to this procedure.  You must either
           do a FIFO or LIFO quque depending on calling order */

        if (pProcCur->attr & M_CDECL) {

            if (pArgCur)
                pArgCur->alpha = symptr;
            else
                pArgFirst = symptr;

            symptr->alpha = NULL;
        }
        else {
            pArgFirst = symptr;
            symptr->alpha = pArgCur;
        }

        pArgCur = symptr;

        if (PEEKC() == '[' && fProcArgs == ARGS_LOCALS) { /* array element given */

            SKIPC();
            for (pLeftBrack = lbufp; PEEKC() && PEEKC() != ']'; SKIPC());

            *lbufp = ',';           /* to stop expression evaluation */
            lbufp = pLeftBrack;
            pArgCur->length = exprconst ();

            *lbufp++ = ']';         /* restore bracket */
        }

        fIsPtr = FALSE;
        defType = varsize = wordsize;

        if (PEEKC() == ':') {       /* parse optional type information */

            SKIPC();
            getatom();

            if (fnsize()){

                if (varsize >= CSFAR) {     /* near | far given */

                    if (varsize == CSFAR)
                        defType += 2;

                    varsize = wordsize;
                    getatom();

                    if (! tokenIS("ptr"))
                        error(E_EXP, "PTR");

                    getatom();
                }
                else {
                    defType = varsize;
                    goto notPtr;
                }
            }

            else if (tokenIS("ptr")){
                if (farData[10] > '0')
                    defType += 2;

                getatom();
            }
            else
                errorc(E_UST);

            defCV = fnPtr(defType);
        }
        else
notPtr:
            defCV = typeFet(defType);

        pArgCur->symu.equ.iProc = iProcCur;
        pArgCur->symtype = defType;
        pArgCur->symu.equ.equrec.txtmacro.type = defCV;

    } while(PEEKC() == ',');

    /* Now that all the parmeters have been scanned, go back through
       the list and assign offsets and create the text macro string */


    bp[strlen(bp)-1] = (fProcArgs == ARGS_LOCALS)? '-': '+';

    for(pArgCur = pArgFirst; pArgCur; pArgCur = pArgCur->alpha) {

        if (fProcArgs == ARGS_LOCALS) {
            offsetCur += (offsetCur % mpTypeAlign[pArgCur->symtype % 4]) +
                          (pArgCur->symtype * pArgCur->length);
            pArgCur->offset = -offsetCur;
        }

        p = xxradixconvert (offsetCur,  &save[100]);
        if (radix == 16)
            *p++ = 'h';
        *p++ = ')';
        *p = NULL;

        strcat( strcat( strcpy (&save[1], siznm[pArgCur->symtype]),
               bp), &save[100]);
        *save = '(';

        if (fProcArgs != ARGS_LOCALS) {
            pArgCur->offset = offsetCur;
            offsetCur += pArgCur->symtype + wordsize - 1;
            offsetCur -= offsetCur % wordsize;
        }

        if (!pass2)
            pArgCur->symu.equ.equrec.txtmacro.equtext = _strdup(save);
    }
}


/***    procbuild - check for end of PROC block
 *
 *      procbuild ();
 *
 *      Entry   *pcproc = current PROC
 *      Exit    *pcproc = current or previous PROC
 *      Returns none
 *      Calls   endblk, parse
 *      Note    if not end of PROC, parse line as normal.  Otherwise,
 *              terminate block.
 */

SHORT     PASCAL CODESIZE
procend ()
{
        USHORT size;

        if (!pcproc)
            errorc( E_BNE );

        else if (pcproc->symkind == PROC) {

            if (!symFet() || symptr != pcproc)
                    errorc (E_BNE);

            /* Length of PROC */
            size = pcoffset - pcproc->offset;
            if (pass2 && size != pcproc->symu.plabel.proclen)
                    errorc (E_PHE);

            fProcArgs = iProcCur = 0;
            pcproc->symu.plabel.proclen = size;
            /* Point to prev PROC */
            pcproc = procStack[--iProcStack];
            pcdisplay ();
        }
}


/* bit flags for segment table */

#define SG_OVERIDE      1       /* name can be overriden */
#define SG_GROUP        2       /* segment belongs to dgroup */

char models[] = "SMALL\0  COMPACT\0MEDIUM\0 LARGE\0  HUGE";
char langs[]  = "C\0      PASCAL\0 FORTRAN\0BASIC";
char textN[] = "_TEXT";
char farTextName[14+5];
SHORT  modelWordSize;

char farCode[] = "@CodeSize=0";  /* text macros for model stuff */
char farData[] = "@DataSize=0";
char modelT[] = ".model";

/* table of segment names and attributes for the model */

struct sSeg{
    char  *sName;       /* segment name */
    UCHAR align;        /* alignment */
    UCHAR combine;      /* combine */
    char  *cName;       /* class name */
    UCHAR flags;        /* internal state flags */

} rgSeg[] = {

    textN,      2, 2, "'CODE'",         SG_OVERIDE,
    "_DATA",    2, 2, "'DATA'",         SG_GROUP,
    "_BSS",     2, 2, "'BSS'",          SG_GROUP,
    "CONST",    2, 2, "'CONST'",        SG_GROUP,
    "STACK",    3, 5, "'STACK'",        SG_GROUP,
    "FAR_DATA", 3, 0, "'FAR_DATA'",     SG_OVERIDE,
    "FAR_BSS",  3, 0, "'FAR_BSS'",      SG_OVERIDE
};


/***    model - process the model directive
 *
 *
 *      Note    Format is:
 *              .MODEL SMALL|MEDIUM|COMPACT|LARGE|HUGE {,C|BASIC|FORTRAN|PASCAL}
 */


VOID PASCAL CODESIZE
model ()
{
        register SHORT iModel;
        char buffT[80];

        /* get the model and classify */

        getatom ();

        for (iModel = 0; iModel <= 32; iModel += 8)
            if (tokenIS(&models[iModel]))
                goto goodModel;

        errorc(E_OPN);
        iModel = 0;

goodModel:
        iModel /= 8;            /* offset into index */
        if (fSimpleSeg && iModel+1 != fSimpleSeg)
            error(E_SMD, modelT);

        fSimpleSeg = iModel + 1;

        if (iModel > 1){        /* far code */

            farCode[10]++;
            rgSeg[0].sName = strcat(strcpy(farTextName, &baseName[10]), textN);
            dirsize[I_PROC] = CSFAR;
        }
        else
            rgSeg[0].flags &= ~SG_OVERIDE;


        if (iModel != 0 && iModel != 2 ){        /* far data */

            farData[10]++;

            if (iModel == 4)            /* huge get a '2' */
                farData[10]++;
        }
#ifdef V386

        if (cputype & P386)
            rgSeg[0].align =
            rgSeg[1].align =
            rgSeg[2].align =
            rgSeg[3].align =
            rgSeg[5].align =
            rgSeg[6].align = 5;         /* make data dword aligned */
#endif
        if (PEEKC() == ',') {   /* language option present */

            SKIPC();
            getatom();

            if (! (langType = fetLang()))
                error(E_EXP, "C|BASIC|FORTRAN|PASCAL");
        }

        if (! pass2){

            modelWordSize = wordsize;

            /* define the text macros, the _data segment so dgroup may
               defined, dgroup and the assume */

            definesym(farCode);
            definesym(farData);

            definesym(strcat(strcpy(buffT, "@code="), rgSeg[0].sName));

            definesym("@data=DGROUP");      symptr->attr |= M_NOCREF;
            definesym("@fardata=FAR_DATA"); symptr->attr |= M_NOCREF;
            definesym("@fardata?=FAR_BSS"); symptr->attr |= M_NOCREF;

            doLine(".code");
            doLine(".data");
            endCurSeg();

        }
        xcreflag--;
        doLine("assume cs:@code,ds:@data,ss:@data");
        xcreflag++;

}

SHORT CODESIZE
fetLang()
{
    SHORT iModel;

    for (iModel = 0; iModel <= 24; iModel += 8)
        if (tokenIS(&langs[iModel])) {
            getatom();
            return(iModel/8 + 1);
        }

    return(langType);
}


/***    openSeg - open a segment in the simplified segment
 *
 *
 */


VOID PASCAL CODESIZE
openSeg ()
{
        register struct sSeg *pSEG;
        char *pSegName;
        char buffT[80];

        if (!fSimpleSeg)
            error(E_EXP, modelT);

        pSEG = &rgSeg[opkind];
        getatom ();

        if (*naim.pszName){

            if (! (pSEG->flags & SG_OVERIDE))
                errorc(E_OCI);

            pSegName = naim.pszName;
        }
        else
            pSegName = pSEG->sName;

        strcat( strcat( strcpy(buffT,
               pSegName),
               " segment "),
               pSEG->cName);

        if (pcsegment && opkind != 4)
            endCurSeg();

        doLine(buffT);

        pcsegment->symu.segmnt.combine = pSEG->combine;
        pcsegment->symu.segmnt.align = pSEG->align;

        if (pSEG == &rgSeg[0])
            regsegment[CSSEG] = pcsegment;

#ifdef V386
        pcsegment->symu.segmnt.use32 = modelWordSize;
        wordsize = modelWordSize;
        defwordsize();
#endif

        if (pSEG->flags & SG_GROUP){

            doLine("DGROUP group @CurSeg");
            pSEG->flags &= ~SG_GROUP;
        }
}

/***    stack - create a stack segment
 *
 *
 */


VOID PASCAL CODESIZE
createStack ()
{
        SHORT size;

        if ((size = exprconst()) == 0)
            size = 1024;

        opkind = 4;             /* index into seg table */
        openSeg();
        pcoffset = size;
        endCurSeg();
}

VOID PASCAL CODESIZE
endCurSeg ()
{
        xcreflag--;
        doLine("@CurSeg ends");
        xcreflag++;
}



/***    freeAFileHandle
 *
 *      Free's a file handle if possible
 *
 *      When working with deeply nested include files it is possible
 *      to run out of file handles. If this happens this function is
 *      called to temporarily close one of the include files. This is
 *      done by saving the current file position, closing the file and
 *      replacing the file handle with FH_CLOSED. Notice that the data
 *      buffer assosciated with the file is not destroyed. Hence readline
 *      can continue to read data from it until more data is needed from
 *      disk. There are two files that won't be closed, the main file and
 *      the current file.
 *      Associated functions:
 *          readmore -  if neccessary, will reopen and seek to the original
 *                      position the file.
 *          closefile - closes the file if it hasn't been already.
 *
 *      return:  TRUE = Was able to close a file, FALSE = Couldn't
 */

int PASCAL CODESIZE
 freeAFileHandle ()
 {
    register FCB *pFCBTmp;

    if( !(pFCBTmp = pFCBMain->pFCBChild) ){
        return( FALSE );    /* The only file open is the main source */
    }
    /* Loop down linked list of nested include files */
    while( pFCBTmp ){
        if( (pFCBTmp->fh != FH_CLOSED) && (pFCBTmp != pFCBCur) ){
            pFCBTmp->savefilepos = _tell( pFCBTmp->fh );
            _close( pFCBTmp->fh );
            pFCBTmp->fh = FH_CLOSED;
            return( TRUE );
        }
        pFCBTmp = pFCBTmp->pFCBChild;
    }
    return( FALSE );        /* Couldn't find a file to close */
}

int PASCAL CODESIZE
fpoRecord ()
{
    unsigned long dwValue[6];
    char          peekChar;
    int           i;
    PFPOSTRUCT    pFpo          = pFpoTail;
    PFPO_DATA     pFpoData      = 0;

    if (PEEKC() != '(') {
        errorc(E_PAR);
        return FALSE;
    }
    SKIPC();
    for (i=0; i<6; i++) {
        dwValue[i] = exprconst();
        peekChar = PEEKC();
        SKIPC();
        if (peekChar != ',') {
            if (i < 5) {
                errorc(E_FPO1);
                return FALSE;
            }
            if (peekChar != ')') {
                errorc(E_PAR);
                return FALSE;
            }
            else {
                break;
            }
        }
    }
    if (!pcproc) {
        errorc(E_FPO2);
        return FALSE;
    }
    if (pass2) {
        return TRUE;
    }
    if (!pFpoHead) {
        pFpoTail = pFpoHead = (PFPOSTRUCT)malloc(sizeof(FPOSTRUCT));
        if (!pFpoHead) {
            errorc(E_RRF);
            return FALSE;
        }
        pFpo = pFpoTail;
    }
    else {
        pFpoTail->next = (PFPOSTRUCT)malloc(sizeof(FPOSTRUCT));
        if (!pFpoTail->next) {
            errorc(E_RRF);
            return FALSE;
        }
        pFpo = pFpoTail->next;
        pFpoTail = pFpo;
    }
    numFpoRecords++;
    memset((void*)pFpo,0,sizeof(FPOSTRUCT));
    pFpoData = &pFpo->fpoData;
    if (pcproc->offset != pcoffset) {
        sprintf(naim.pszName, "%s_fpo%d", pcproc->nampnt->id, numFpoRecords);
        strcpy(naim.pszLowerCase, naim.pszName);
        _strlwr(naim.pszLowerCase);
        naim.ucCount = strlen(naim.pszName);
        naim.usHash = 0;
        labelcreate(CSNEAR, CLABEL);
        pFpo->pSymAlt = symptr;
    }
    else {
        pFpo->pSymAlt = 0;
    }
    pFpo->pSym              = pcproc;
    pFpoData->ulOffStart    = pcoffset;
    pFpoData->cbProcSize    = 0;
    pFpoData->cdwLocals     = dwValue[0];
    pFpoData->cdwParams     = dwValue[1];
    pFpoData->cbProlog      = dwValue[2];
    pFpoData->cbRegs        = dwValue[3];
    pFpoData->fUseBP        = dwValue[4];
    pFpoData->cbFrame       = dwValue[5];
    pFpoData->fHasSEH       = 0;
    return TRUE;
}