types.c

asn.1 compiler

        case BASICTYPE_CHOICE:
           /*
            * must fill field names BEFORE filling choice elmts
            * (allows better naming for choice ids)
            */
            FillCxxFieldNames (r, t->basicType->a.choice);
            FillCxxChoiceElmts (r, m, head, t, t->basicType->a.choice);
            break;

        case BASICTYPE_SET:
        case BASICTYPE_SEQUENCE:
            FillCxxStructElmts (r, m, head, t, t->basicType->a.set);
            FillCxxFieldNames (r, t->basicType->a.set);
            break;

        case BASICTYPE_COMPONENTSOF:
        case BASICTYPE_SELECTION:
            fprintf (stderr,"Compiler error - COMPONENTS OF or SELECTION type slipped through normalizing phase.\n");
            break;

        case BASICTYPE_UNKNOWN:
        case BASICTYPE_MACRODEF:
        case BASICTYPE_MACROTYPE:
            /* do nothing */
            break;

    }

    /*
     * figure out whether this is a ptr based on the enclosing
     * type (if any) and optionality/default
     */
    cxxtri->isPtr = IsCxxPtr (r, head, parent, t);

    /* let user overide any defaults with the --snacc attributes */
    /* undefined for C++ ParseTypeRefAttribs (ctri, t->attrList); */


}  /* FillCxxTypeRefInfo */



static void
FillCxxStructElmts PARAMS ((r, m, head, parent, elmts),
    CxxRules *r _AND_
    Module *m _AND_
    TypeDef *head _AND_
    Type *parent _AND_
    NamedTypeList *elmts)
{
    NamedType *et;

    FOR_EACH_LIST_ELMT (et, elmts)
    {
        FillCxxTypeRefInfo (r, m, head, parent, et->type);
    }

}  /* FillCxxStructElmts */



/*
 *  Figures out non-conflicting enum names for the
 *  choice id's
 */
static void
FillCxxChoiceElmts PARAMS ((r, m, head, parent, elmts),
    CxxRules *r _AND_
    Module *m _AND_
    TypeDef *head _AND_
    Type *parent _AND_
    NamedTypeList *elmts)
{
    NamedType *et;
    int idCount = 0;
    CxxTRI *cxxtri;
    int   len;

    /*
     * fill in type info for elmt types first
     */
    FOR_EACH_LIST_ELMT (et, elmts)
        FillCxxTypeRefInfo (r, m, head, parent, et->type);

    /*
     * set choiceId Symbol & value
     * eg
     *  Car ::= CHOICE {          class Car {
     *     chev ChevCar,   ->         enum ChoiceIdEnum {
     *     ford FordCar                  chevCid,
     *     toyota ToyotaCar              fordCid,
     *     }                             toyotaCid } choiceId;
     *                                union CarChoiceUnion {
     *                                      ChevCar *chev;
     *                                      FordCar *ford;
     *                                      ToyotaCar *toyota; };
     *                                  ...
     *                               }
     * NOTE that the union is anonymous
     */
    FOR_EACH_LIST_ELMT (et, elmts)
    {
        cxxtri =  et->type->cxxTypeRefInfo;

        if (cxxtri == NULL)
            continue; /* wierd type */

        cxxtri->choiceIdValue = idCount++;

        len = strlen (cxxtri->fieldName);
        cxxtri->choiceIdSymbol = Malloc (len + 4);
        strcpy (cxxtri->choiceIdSymbol, cxxtri->fieldName);
        strcat (cxxtri->choiceIdSymbol, "Cid");

        if (r->capitalizeNamedElmts)
            Str2UCase (cxxtri->choiceIdSymbol, len);

    }

}  /* FillCxxChoiceElmts */


/*
 * takes a list of "sibling" (eg same level in a structure)
 * ElmtTypes and fills sets up the c field names in
 * the CxxTRI struct
 */
static void
FillCxxFieldNames PARAMS ((r, elmts),
    CxxRules *r _AND_
    NamedTypeList *elmts)
{
    NamedType  *et;
    CxxTRI *cxxtri;
    DefinedObj *fieldNames;
    int        len, num, digit, i, tmpLen;
    char      *tmpName;
    char      *asn1FieldName;
    char      *cFieldName;

    /*
     * Initialize fieldname data
     * allocate (if nec) and fill in CTRI fieldname if poss
     * from asn1 field name.  leave blank otherwise
     */
    fieldNames = NewObjList();
    FOR_EACH_LIST_ELMT (et, elmts)
    {
        cxxtri =  et->type->cxxTypeRefInfo;
        if (cxxtri == NULL)
        {
            cxxtri = MT (CxxTRI);
            et->type->cxxTypeRefInfo = cxxtri;
        }
        if (et->fieldName != NULL)
        {
            /*
             * can assume that the field names are
             * distinct because they have passed the
             * error checking step.
             * However, still call MakeCxxStrUnique
             * to change any field names that
             * conflict with C++ keywords
             */
            asn1FieldName = et->fieldName;
            tmpName = Asn1FieldName2CFieldName (asn1FieldName);
            cxxtri->fieldName = Malloc (strlen (tmpName) + 1 +
                                       r->maxDigitsToAppend);
            strcpy (cxxtri->fieldName, tmpName);
            Free (tmpName);

/*   old    cxxtri->fieldName = Asn1FieldName2CFieldName (asn1FieldName); */

            MakeCxxStrUnique (fieldNames, cxxtri->fieldName, r->maxDigitsToAppend, 1);
            DefineObj (&fieldNames, cxxtri->fieldName);
        }
    }


    FOR_EACH_LIST_ELMT (et, elmts)
    {
        cxxtri =  et->type->cxxTypeRefInfo;

        /*
         * generate field names for those without them
         */
        if (cxxtri->fieldName == NULL)
        {
            if ((et->type->basicType->choiceId == BASICTYPE_LOCALTYPEREF) ||
                 (et->type->basicType->choiceId == BASICTYPE_IMPORTTYPEREF))
            {
                /*
                 * take ref'd type name as field name
                 * convert first let to lower case
                 */
                tmpName = et->type->basicType->a.localTypeRef->link->cxxTypeDefInfo->className;
                tmpName =  Asn1TypeName2CTypeName (tmpName);
                cFieldName = Malloc (strlen (tmpName) + r->maxDigitsToAppend +1);
                strcpy (cFieldName, tmpName);
                Free (tmpName);
                if (isupper (cFieldName[0]))
                    cFieldName[0] = tolower (cFieldName[0]);
            }
            else
            {
                /*
                 * get default field name for this type
                 */
                tmpName = r->typeConvTbl[et->type->basicType->choiceId].defaultFieldName;
                cFieldName = Malloc (strlen (tmpName) + r->maxDigitsToAppend +1);
                strcpy (cFieldName, tmpName);

                if (isupper (cFieldName[0]))
                    cFieldName[0] = tolower (cFieldName[0]);
            }


            len = strlen (cFieldName);

            /*
             * try to use just the type name (with lower case first char).
             * if that is already used in this type or a C++ keyword,
             * append ascii digits to field name until unique
             * in this type
             */
            MakeCxxStrUnique (fieldNames, cFieldName, r->maxDigitsToAppend, 1);
            DefineObj (&fieldNames, cFieldName);
            cxxtri->fieldName = cFieldName;
        }
    }
    FreeDefinedObjs (&fieldNames);
}  /* FillCxxFieldNames */



/*
 * returns true if this c type for this type should be
 * be ref'd as a ptr
 */
static int
IsCxxPtr PARAMS ((r, td, parent, t),
    CxxRules *r _AND_
    TypeDef *td _AND_
    Type *parent _AND_
    Type *t)
{
    CxxTDI *cxxtdi;
    int retVal = FALSE;

    /*
     * inherit ptr attriubutes from ref'd type if any
     * otherwise grab lib c type def from the CxxRules
     */
    if ((t->basicType->choiceId == BASICTYPE_LOCALTYPEREF) ||
        (t->basicType->choiceId == BASICTYPE_IMPORTTYPEREF))
    {
        cxxtdi = t->basicType->a.localTypeRef->link->cxxTypeDefInfo;
    }
    else
        cxxtdi = &r->typeConvTbl[GetBuiltinType (t)];

    /* no parent means t is the root of a typedef */
    if ((parent == NULL) && (cxxtdi->isPtrForTypeDef))
        retVal = TRUE;

    else if ((parent != NULL) &&
             ((parent->basicType->choiceId == BASICTYPE_SET) ||
             (parent->basicType->choiceId == BASICTYPE_SEQUENCE)) &&
             (cxxtdi->isPtrInSetAndSeq))
        retVal = TRUE;

    else if ((parent != NULL) &&
             ((parent->basicType->choiceId == BASICTYPE_SETOF) ||
             (parent->basicType->choiceId == BASICTYPE_SEQUENCEOF)) &&
             (cxxtdi->isPtrInList))
        retVal = TRUE;

    else if ((parent != NULL) &&
             (parent->basicType->choiceId == BASICTYPE_CHOICE) &&
             (cxxtdi->isPtrInChoice))
        retVal = TRUE;

    else if (((t->optional) || (t->defaultVal != NULL)) && (cxxtdi->isPtrForOpt))
        retVal = TRUE;

    return retVal;
}  /* IsCxxPtr */



/* fill given cxxtdi with defaults from table for given typedef */
void
FillCxxTDIDefaults PARAMS ((r, cxxtdi, td),
    CxxRules *r _AND_
    CxxTDI *cxxtdi _AND_
    TypeDef *td)
{
    CxxTDI *tblCxxtdi;
    int typeIndex;
    char *tmpName;

    typeIndex = GetBuiltinType (td->type);

    if (typeIndex < 0)
        return;

    tblCxxtdi = &r->typeConvTbl[typeIndex];

    memcpy (cxxtdi, tblCxxtdi, sizeof (CxxTDI));

    /* make sure class name is unique wrt to previously defined classes */
    tmpName = Asn1TypeName2CTypeName (td->definedName);
    cxxtdi->className = Malloc (strlen (tmpName) + r->maxDigitsToAppend +1);
    strcpy (cxxtdi->className, tmpName);
    Free (tmpName);

    MakeCxxStrUnique (definedNamesG, cxxtdi->className, r->maxDigitsToAppend, 1);
    DefineObj (&definedNamesG, cxxtdi->className);

} /* FillCxxTDIDefaults */