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90 lines
3.2 KiB
OpenEdge ABL
90 lines
3.2 KiB
OpenEdge ABL
[SynopticScenes::] Scenes.
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To compile the main/synoptic/scenes submodule.
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@ Our inventory |inv| already contains a list |inv->scene_nodes| of all packages
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in the tree with type |_instance| which are of the kind |K_scene|. (These do not
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have ID numbers here because they already have |instance_id| values by virtue
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of being instances.)
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=
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void SynopticScenes::compile(inter_tree *I, pipeline_step *step, tree_inventory *inv) {
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if (InterNodeList::array_len(inv->scene_nodes) > 0)
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InterNodeList::array_sort(inv->scene_nodes, MakeSynopticModuleStage::module_order);
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@<Define SHOWSCENESTATUS function@>;
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@<Define DETECTSCENECHANGE function@>;
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}
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@<Define SHOWSCENESTATUS function@> =
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inter_name *iname = HierarchyLocations::iname(I, SHOWSCENESTATUS_HL);
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Synoptic::begin_function(I, iname);
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for (int i=0; i<InterNodeList::array_len(inv->scene_nodes); i++) {
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inter_package *pack =
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InterPackage::at_this_head(inv->scene_nodes->list[i].node);
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inter_symbol *ssf_s = Metadata::read_symbol(pack, I"^scene_status_fn");
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Produce::inv_call_symbol(I, ssf_s);
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}
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Synoptic::end_function(I, step, iname);
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@ There is one argument, |chs|: the number of iterations so far. Iterations
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occur because each set of scene changes could change the circumstances in such
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a way that other scene changes are now required (through external conditions,
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not through anchors); we don't want this to lock up, so we will cap recursion.
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Within the function, a second local variable, |ch|, is a flag indicating
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whether any change in status has or has not occurred.
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@d MAX_SCENE_CHANGE_ITERATION 20
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@<Define DETECTSCENECHANGE function@> =
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inter_name *iname = HierarchyLocations::iname(I, DETECTSCENECHANGE_HL);
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Synoptic::begin_function(I, iname);
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inter_symbol *chs_s = Synoptic::local(I, I"chs", NULL);
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inter_symbol *Again_l = Produce::reserve_label(I, I".Again");
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inter_symbol *CScene_l = Produce::reserve_label(I, I".CScene");
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Produce::place_label(I, Again_l);
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for (int i=0; i<InterNodeList::array_len(inv->scene_nodes); i++) {
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inter_package *pack =
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InterPackage::at_this_head(inv->scene_nodes->list[i].node);
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inter_symbol *scf_s = Metadata::read_symbol(pack, I"^scene_change_fn");
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Produce::inv_primitive(I, IF_BIP);
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Produce::down(I);
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Produce::inv_call_symbol(I, scf_s);
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Produce::code(I);
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Produce::down(I);
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Produce::inv_primitive(I, JUMP_BIP);
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Produce::down(I);
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Produce::lab(I, CScene_l);
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Produce::up(I);
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Produce::up(I);
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Produce::up(I);
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}
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Produce::rfalse(I);
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Produce::place_label(I, CScene_l);
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Produce::inv_primitive(I, IF_BIP);
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Produce::down(I);
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Produce::inv_primitive(I, GT_BIP);
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Produce::down(I);
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Produce::val_symbol(I, K_value, chs_s);
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Produce::val(I, K_value, LITERAL_IVAL, (inter_ti) MAX_SCENE_CHANGE_ITERATION);
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Produce::up(I);
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Produce::code(I);
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Produce::down(I);
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Produce::inv_primitive(I, PRINT_BIP);
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Produce::down(I);
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Produce::val_text(I, I">--> The scene change machinery is stuck.\n");
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Produce::up(I);
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Produce::rtrue(I);
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Produce::up(I);
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Produce::up(I);
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Produce::inv_primitive(I, PREINCREMENT_BIP);
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Produce::down(I);
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Produce::ref_symbol(I, K_value, chs_s);
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Produce::up(I);
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Produce::inv_primitive(I, JUMP_BIP);
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Produce::down(I);
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Produce::lab(I, Again_l);
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Produce::up(I);
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Synoptic::end_function(I, step, iname);
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