Defining the permission construct.
enum PERMISSION_IST
void Inter::Permission::define(void) { inter_construct *IC = Inter::Defn::create_construct( PERMISSION_IST, L"permission (%i+) (%i+) *(%i*)", I"permission", I"permissions"); METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Permission::read); METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Permission::verify); METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Permission::write); }
define DEFN_PERM_IFLD 2 define PROP_PERM_IFLD 3 define OWNER_PERM_IFLD 4 define STORAGE_PERM_IFLD 5 define EXTENT_PERM_IFR 6
int pp_counter = 1; void Inter::Permission::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) { *E = Inter::Defn::vet_level(IBM, PERMISSION_IST, ilp->indent_level, eloc); if (*E) return; if (Inter::Annotations::exist(&(ilp->set))) { *E = Inter::Errors::plain(I"__annotations are not allowed", eloc); return; } inter_symbol *prop_name = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), ilp->mr.exp[0], PROPERTY_IST, E); if (*E) return; inter_symbol *owner_name = Inter::Textual::find_KOI(eloc, Inter::Bookmarks::scope(IBM), ilp->mr.exp[1], E); if (*E) return; if (Inter::Kind::is(owner_name)) { if (Inter::Types::is_enumerated(Inter::Kind::data_type(owner_name)) == FALSE) { *E = Inter::Errors::quoted(I"not a kind which can have property values", ilp->mr.exp[1], eloc); return; } inter_node_list *FL = Inter::Warehouse::get_frame_list( Inter::Bookmarks::warehouse(IBM), Inter::Kind::permissions_list(owner_name)); if (FL == NULL) internal_error("no permissions list"); inter_tree_node *X; LOOP_THROUGH_INTER_NODE_LIST(X, FL) { inter_symbol *prop_allowed = InterSymbolsTables::symbol_from_frame_data(X, PROP_PERM_IFLD); if (prop_allowed == prop_name) { *E = Inter::Errors::quoted(I"permission already given", ilp->mr.exp[0], eloc); return; } } } else { inter_node_list *FL = Inter::Warehouse::get_frame_list( Inter::Bookmarks::warehouse(IBM), Inter::Instance::permissions_list(owner_name)); if (FL == NULL) internal_error("no permissions list"); inter_tree_node *X; LOOP_THROUGH_INTER_NODE_LIST(X, FL) { inter_symbol *prop_allowed = InterSymbolsTables::symbol_from_frame_data(X, PROP_PERM_IFLD); if (prop_allowed == prop_name) { *E = Inter::Errors::quoted(I"permission already given", ilp->mr.exp[0], eloc); return; } } } TEMPORARY_TEXT(ident) WRITE_TO(ident, "pp_auto_%d", pp_counter++); inter_symbol *pp_name = Inter::Textual::new_symbol(eloc, Inter::Bookmarks::scope(IBM), ident, E); DISCARD_TEXT(ident) if (*E) return; inter_symbol *store = NULL; if (Str::len(ilp->mr.exp[2]) > 0) { store = Inter::Textual::find_symbol(Inter::Bookmarks::tree(IBM), eloc, Inter::Bookmarks::scope(IBM), ilp->mr.exp[2], CONSTANT_IST, E); if (*E) return; } *E = Inter::Permission::new(IBM, InterSymbolsTables::id_from_IRS_and_symbol(IBM, prop_name), InterSymbolsTables::id_from_IRS_and_symbol(IBM, owner_name), InterSymbolsTables::id_from_IRS_and_symbol(IBM, pp_name), (store)?(InterSymbolsTables::id_from_IRS_and_symbol(IBM, store)):0, (inter_ti) ilp->indent_level, eloc); } inter_error_message *Inter::Permission::new(inter_bookmark *IBM, inter_ti PID, inter_ti KID, inter_ti PPID, inter_ti SID, inter_ti level, inter_error_location *eloc) { inter_tree_node *P = Inode::fill_4(IBM, PERMISSION_IST, PPID, PID, KID, SID, eloc, level); inter_error_message *E = Inter::Defn::verify_construct(Inter::Bookmarks::package(IBM), P); if (E) return E; Inter::Bookmarks::insert(IBM, P); return NULL; } void Inter::Permission::verify(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) { inter_ti vcount = Inode::vcount(P); if (P->W.extent != EXTENT_PERM_IFR) { *E = Inode::error(P, I"extent wrong", NULL); return; } *E = Inter::Verify::defn(owner, P, DEFN_PERM_IFLD); if (*E) return; *E = Inter::Verify::symbol(owner, P, P->W.data[PROP_PERM_IFLD], PROPERTY_IST); if (*E) return; *E = Inter::Verify::symbol_KOI(owner, P, P->W.data[OWNER_PERM_IFLD]); if (*E) return; if (P->W.data[STORAGE_PERM_IFLD]) { *E = Inter::Verify::symbol(owner, P, P->W.data[STORAGE_PERM_IFLD], CONSTANT_IST); if (*E) return; } inter_symbol *prop_name = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[PROP_PERM_IFLD]);; inter_symbol *owner_name = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[OWNER_PERM_IFLD]);; if (vcount == 0) { inter_node_list *FL = NULL; if (Inter::Kind::is(owner_name)) { if (Inter::Types::is_enumerated(Inter::Kind::data_type(owner_name)) == FALSE) { *E = Inode::error(P, I"property permission for non-enumerated kind", NULL); return; } FL = Inode::ID_to_frame_list(P, Inter::Kind::permissions_list(owner_name)); if (FL == NULL) internal_error("no permissions list"); inter_tree_node *X; LOOP_THROUGH_INTER_NODE_LIST(X, FL) { inter_symbol *prop_X = InterSymbolsTables::symbol_from_frame_data(X, PROP_PERM_IFLD); inter_symbol *prop_P = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[PROP_PERM_IFLD]);; if (prop_X == prop_P) { *E = Inode::error(P, I"duplicate permission", prop_name->symbol_name); return; } inter_symbol *owner_X = InterSymbolsTables::symbol_from_frame_data(X, OWNER_PERM_IFLD); inter_symbol *owner_P = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[OWNER_PERM_IFLD]);; if (owner_X != owner_P) { *E = Inode::error(P, I"kind permission list malformed", owner_name->symbol_name); return; } } } else { FL = Inode::ID_to_frame_list(P, Inter::Instance::permissions_list(owner_name)); if (FL == NULL) internal_error("no permissions list"); inter_tree_node *X; LOOP_THROUGH_INTER_NODE_LIST(X, FL) { inter_symbol *prop_X = InterSymbolsTables::symbol_from_frame_data(X, PROP_PERM_IFLD); inter_symbol *prop_P = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[PROP_PERM_IFLD]);; if (prop_X == prop_P) { *E = Inode::error(P, I"duplicate permission", prop_name->symbol_name); return; } inter_symbol *owner_X = InterSymbolsTables::symbol_from_frame_data(X, OWNER_PERM_IFLD); inter_symbol *owner_P = InterSymbolsTables::symbol_from_id(Inter::Packages::scope(owner), P->W.data[OWNER_PERM_IFLD]);; if (owner_X != owner_P) { *E = Inode::error(P, I"instance permission list malformed", owner_name->symbol_name); return; } } } Inter::ListLiterals::add(FL, P); FL = Inode::ID_to_frame_list(P, Inter::Property::permissions_list(prop_name)); Inter::ListLiterals::add(FL, P); } } void Inter::Permission::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) { inter_symbol *prop_name = InterSymbolsTables::symbol_from_frame_data(P, PROP_PERM_IFLD); inter_symbol *owner_name = InterSymbolsTables::symbol_from_frame_data(P, OWNER_PERM_IFLD); if ((prop_name) && (owner_name)) { WRITE("permission %S %S", prop_name->symbol_name, owner_name->symbol_name); if (P->W.data[STORAGE_PERM_IFLD]) { inter_symbol *store = InterSymbolsTables::symbol_from_frame_data(P, STORAGE_PERM_IFLD); WRITE(" %S", store->symbol_name); } } else { *E = Inode::error(P, I"cannot write permission", NULL); return; } }