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/*
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 "calculus.h"
#include "check.h"
#include "common.h"
#include "error.h"
#include "output.h"
#include "type_ops.h"
#include "xalloc.h"
/*
LIST OF ALL NAMES
This variable contains a list of all the names defined within the algebra.
*/
static NAME *all_names = NULL ;
/*
ARRAY OF NAME ERRORS
This array gives all the errors associated with the various name types.
*/
static char *name_error [] = {
"Type name %s",
"Auxilliary type name %s",
"Enumeration constant %s.%s",
"Structure component %s.%s",
"Union component %s.%s",
"Union field component %s.%s.%s",
"Union map %s.%s",
"Union map argument %s.%s"
} ;
/*
LOOK UP A NAME
This routine looks up the name with type n and components a, b and c in
the list of all names.
*/
static NAME *find_name
PROTO_N ( ( n, a, b, c ) )
PROTO_T ( int n X char *a X char *b X char *c )
{
NAME *p ;
for ( p = all_names ; p != NULL ; p = p->next ) {
if ( p->type == n && streq ( p->text [0], a ) &&
streq ( p->text [1], b ) && streq ( p->text [2], c ) ) {
return ( p ) ; ;
}
}
return ( NULL ) ;
}
/*
CREATE A NAME
This routine adds the name with type n and components a, b and c to the
list of all names.
*/
static void make_name
PROTO_N ( ( n, a, b, c ) )
PROTO_T ( int n X char *a X char *b X char *c )
{
static int names_left = 0 ;
static NAME *names_free = NULL ;
NAME *p = find_name ( n, a, b, c ) ;
if ( p ) {
char buffer [1000] ;
sprintf_v ( buffer, name_error [n], a, b, c ) ;
error ( ERROR_SERIOUS, "%s already defined (at %s, line %d)",
buffer, p->file, p->line ) ;
return ;
}
if ( names_left == 0 ) {
names_left = 1000 ;
names_free = xmalloc_nof ( NAME, names_left ) ;
}
p = names_free + ( --names_left ) ;
p->type = n ;
p->text [0] = a ;
p->text [1] = b ;
p->text [2] = c ;
p->file = crt_file_name ;
p->line = crt_line_no ;
p->next = all_names ;
all_names = p ;
return ;
}
/*
EXTRACT NAMES FROM AN IDENTIFIER
This routine assigns the names from the identifier id into na and nb.
It also sets the current file position to the location of id.
*/
static void split_id
PROTO_N ( ( id, na, nb ) )
PROTO_T ( CLASS_ID_P id X char **na X char **nb )
{
*na = DEREF_string ( cid_name ( id ) ) ;
*nb = DEREF_string ( cid_name_aux ( id ) ) ;
crt_file_name = DEREF_string ( cid_file ( id ) ) ;
crt_line_no = DEREF_int ( cid_line ( id ) ) ;
return ;
}
/*
CHECK FOR NAME CLASHES
This routine scans through the entire algebra definition checking for
name clashes. Type names are only checked if c is true.
*/
void check_names
PROTO_N ( ( c ) )
PROTO_T ( int c )
{
CLASS_ID_P id ;
char *na, *nb ;
char *empty = "" ;
int line = crt_line_no ;
CONST char *file = crt_file_name ;
all_names = NULL ;
LOOP_PRIMITIVE {
id = DEREF_ptr ( prim_id ( CRT_PRIMITIVE ) ) ;
split_id ( id, &na, &nb ) ;
if ( c ) make_name ( NAME_TYPE, na, empty, empty ) ;
make_name ( NAME_TYPE_AUX, nb, empty, empty ) ;
}
LOOP_IDENTITY {
id = DEREF_ptr ( ident_id ( CRT_IDENTITY ) ) ;
split_id ( id, &na, &nb ) ;
if ( c ) make_name ( NAME_TYPE, na, empty, empty ) ;
make_name ( NAME_TYPE_AUX, nb, empty, empty ) ;
}
LOOP_ENUM {
id = DEREF_ptr ( en_id ( CRT_ENUM ) ) ;
split_id ( id, &na, &nb ) ;
if ( c ) make_name ( NAME_TYPE, na, empty, empty ) ;
make_name ( NAME_TYPE_AUX, nb, empty, empty ) ;
LOOP_ENUM_CONST {
char *ne = DEREF_string ( ec_name ( CRT_ECONST ) ) ;
make_name ( NAME_ENUM_CONST, na, ne, empty ) ;
}
}
LOOP_STRUCTURE {
id = DEREF_ptr ( str_id ( CRT_STRUCTURE ) ) ;
split_id ( id, &na, &nb ) ;
if ( c ) make_name ( NAME_TYPE, na, empty, empty ) ;
make_name ( NAME_TYPE_AUX, nb, empty, empty ) ;
LOOP_STRUCTURE_COMPONENT {
char *nc = DEREF_string ( cmp_name ( CRT_COMPONENT ) ) ;
make_name ( NAME_STRUCT_CMP, na, nc, empty ) ;
}
}
LOOP_UNION {
id = DEREF_ptr ( un_id ( CRT_UNION ) ) ;
split_id ( id, &na, &nb ) ;
if ( c ) make_name ( NAME_TYPE, na, empty, empty ) ;
make_name ( NAME_TYPE_AUX, nb, empty, empty ) ;
LOOP_UNION_COMPONENT {
char *nc = DEREF_string ( cmp_name ( CRT_COMPONENT ) ) ;
make_name ( NAME_UNION_CMP, na, nc, empty ) ;
}
LOOP_UNION_FIELD {
char *nf = DEREF_string ( fld_name ( CRT_FIELD ) ) ;
make_name ( NAME_UNION_CMP, na, nf, empty ) ;
LOOP_FIELD_COMPONENT {
char *nc = DEREF_string ( cmp_name ( CRT_COMPONENT ) ) ;
make_name ( NAME_FIELD_CMP, na, nf, nc ) ;
}
}
LOOP_UNION_MAP {
char *nm = DEREF_string ( map_name ( CRT_MAP ) ) ;
make_name ( NAME_MAP, na, nm, empty ) ;
LOOP_MAP_ARGUMENT {
char *np = DEREF_string ( arg_name ( CRT_ARGUMENT ) ) ;
make_name ( NAME_MAP_ARG, na, nm, np ) ;
}
}
}
crt_file_name = file ;
crt_line_no = line ;
return ;
}