Subversion Repositories tendra.SVN

/*
                 Crown Copyright (c) 1997
    
    This TenDRA(r) Computer Program is subject to Copyright
    owned by the United Kingdom Secretary of State for Defence
    acting through the Defence Evaluation and Research Agency
    (DERA).  It is made available to Recipients with a
    royalty-free licence for its use, reproduction, transfer
    to other parties and amendment for any purpose not excluding
    product development provided that any such use et cetera
    shall be deemed to be acceptance of the following conditions:-
    
        (1) Its Recipients shall ensure that this Notice is
        reproduced upon any copies or amended versions of it;
    
        (2) Any amended version of it shall be clearly marked to
        show both the nature of and the organisation responsible
        for the relevant amendment or amendments;
    
        (3) Its onward transfer from a recipient to another
        party shall be deemed to be that party's acceptance of
        these conditions;
    
        (4) DERA gives no warranty or assurance as to its
        quality or suitability for any purpose and DERA accepts
        no liability whatsoever in relation to any use to which
        it may be put.
*/


#include "config.h"
#include "object.h"
#include "hash.h"
#include "name.h"
#include "type.h"
#include "utility.h"
#include "variable.h"


/*
    CREATE A NEW OBJECT

    This routine creates a new object, with name nm and type t.
*/

object *make_object
    PROTO_N ( ( nm, t ) )
    PROTO_T ( char *nm X int t )
{
    object *p ;
    alloc_variable ( p, object, 1000 ) ;
    p->name = nm ;
    p->objtype = t ;
    p->next = null ;
    p->filename = filename ;
    p->line_no = line_no ;
    return ( p ) ;
}


/*
    JOIN TWO LISTS OF OBJECTS

    This routine joins two lists of objects, returning the result.
*/

object *join_object
    PROTO_N ( ( p, q ) )
    PROTO_T ( object *p X object *q )
{
    object *r = p ;
    if ( p == null ) return ( q ) ;
    if ( q == null ) return ( p ) ;
    while ( r->next ) r = r->next ;
    r->next = q ;
    return ( p ) ;
}


/*
    FIND A SUBSET

    This routine looks up the subset named nm.  The operation for splitting
    nm into its components (which should only be called with preprocessed
    input) needs to be kept in step with subset_name.
*/

object *make_subset
    PROTO_N ( ( nm ) )
    PROTO_T ( char *nm )
{
    object *p = search_hash ( subsets, nm, no_version ) ;
    if ( p == null ) {
        char *api = string_copy ( nm ) ;
        char *file = null ;
        char *subset = null ;
        char *s = strchr ( api, ':' ) ;
        if ( s ) {
            *s = 0 ;
            file = s + 1 ;
            s = strchr ( file, ':' ) ;
            if ( s ) {
                *s = 0 ;
                subset = s + 1 ;
            }
            if ( *file == 0 ) file = null ;
        }
        p = make_object ( nm, OBJ_SUBSET ) ;
        p->u.u_info = make_info ( api, file, subset ) ;
        p->u.u_info->age = ( time_t ) 0 ;
        IGNORE add_hash ( subsets, p, no_version ) ;
    }
    return ( p ) ;
}


/*
    CREATE SUBSET INFORMATION

    This routine creates the subset information for the subset
    api:file:subset.
*/

info *make_info
    PROTO_N ( ( api, file, subset ) )
    PROTO_T ( char *api X char *file X char *subset )
{
    info *p ;
    alloc_variable ( p, info, 100 ) ;
    p->api = api ;
    p->file = file ;
    p->subset = subset ;
    p->age = date_stamp ( filename ) ;
    p->incl = include_name ( output_incl_dir, api, file, subset ) ;
    p->src = src_name ( output_src_dir, api, file, subset ) ;
    p->block = block_name ( api, file, subset ) ;
    p->linkage = "C" ;
    p->nspace = null ;
    p->method = null ;
    p->prefix = token_prefix ( api, file, subset ) ;
    p->protect = macro_name ( PROTECT_PREFIX, api, file, subset ) ;
    p->version = null ;
    p->tokens = 0 ;
    p->implemented = 0 ;
    p->elements = null ;
    return ( p ) ;
}


/*
    UPDATE A SUBSET DATESTAMP

    This routine updates the datestamp on the subset p from that on the
    subset q.
*/

void update_time
    PROTO_N ( ( p, q ) )
    PROTO_T ( object *p X object *q )
{
    if ( p && q ) {
        time_t tp = p->u.u_info->age ;
        time_t tq = q->u.u_info->age ;
        if ( tp && tq > tp ) p->u.u_info->age = tq ;
    }
    return ;
}


/*
    CREATE A TOKEN

    This routine creates a token called nm (version vers) describing the
    object p.  If this is a real token then the tokens field of the
    current subset is set.
*/

object *make_token
    PROTO_N ( ( nm, vers, p, objtype ) )
    PROTO_T ( char *nm X int vers X object *p X int objtype )
{
    object *r = make_object ( nm, OBJ_TOKEN ) ;
    r->u.u_obj = p ;
    IGNORE add_hash ( tokens, r, vers ) ;
    if ( crt_object ) {
        switch ( objtype ) {
            case OBJ_EXTERN :
            case OBJ_WEAK : {
                break ;
            }
            default : {
                crt_object->u.u_info->tokens = 1 ;
                break ;
            }
        }
    }
    return ( r ) ;
}


/*
    CREATE AN EXPRESSION

    This routine creates and expression object of type t called nm (version
    vers).
*/

object *make_exp
    PROTO_N ( ( nm, vers, t ) )
    PROTO_T ( char *nm X int vers X int t )
{
    object *r = make_object ( nm, t ) ;
    IGNORE add_hash ( exps, r, vers ) ;
    r->u.u_type = null  ;
    return ( r ) ;
}