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79 lines
3.2 KiB
OpenEdge ABL
79 lines
3.2 KiB
OpenEdge ABL
[Inter::Lab::] The Lab Construct.
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Defining the Lab construct.
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@
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@e LAB_IST
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=
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void Inter::Lab::define(void) {
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inter_construct *IC = Inter::Defn::create_construct(
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LAB_IST,
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L"lab (%C+)",
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I"lab", I"labs");
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IC->min_level = 1;
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IC->max_level = 100000000;
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IC->usage_permissions = INSIDE_CODE_PACKAGE;
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METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Lab::read);
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METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Lab::verify);
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METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Lab::write);
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}
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@
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@d BLOCK_LAB_IFLD 2
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@d LABEL_LAB_IFLD 3
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@d EXTENT_LAB_IFR 4
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=
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void Inter::Lab::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
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if (ilp->no_annotations > 0) { *E = Inter::Errors::plain(I"__annotations are not allowed", eloc); return; }
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*E = Inter::Defn::vet_level(IBM, LAB_IST, ilp->indent_level, eloc);
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if (*E) return;
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inter_symbol *routine = Inter::Defn::get_latest_block_symbol();
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if (routine == NULL) { *E = Inter::Errors::plain(I"'lab' used outside function", eloc); return; }
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inter_symbols_table *locals = Inter::Package::local_symbols(routine);
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if (locals == NULL) { *E = Inter::Errors::plain(I"function has no symbols table", eloc); return; }
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inter_symbol *label = Inter::SymbolsTables::symbol_from_name(locals, ilp->mr.exp[0]);
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if (Inter::Symbols::is_label(label) == FALSE) { *E = Inter::Errors::plain(I"not a label", eloc); return; }
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*E = Inter::Lab::new(IBM, routine, label, (inter_t) ilp->indent_level, eloc);
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}
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inter_error_message *Inter::Lab::new(inter_bookmark *IBM, inter_symbol *routine, inter_symbol *label, inter_t level, inter_error_location *eloc) {
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inter_frame P = Inter::Frame::fill_2(IBM, LAB_IST, 0, Inter::SymbolsTables::id_from_IRS_and_symbol(IBM, label), eloc, (inter_t) level);
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inter_error_message *E = Inter::Defn::verify_construct(Inter::Bookmarks::package(IBM), P); if (E) return E;
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Inter::Frame::insert(P, IBM);
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return NULL;
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}
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void Inter::Lab::verify(inter_construct *IC, inter_frame P, inter_package *owner, inter_error_message **E) {
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if (P.extent != EXTENT_LAB_IFR) { *E = Inter::Frame::error(&P, I"extent wrong", NULL); return; }
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inter_symbol *routine = owner->package_name;
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inter_symbol *label = Inter::SymbolsTables::local_symbol_from_id(routine, P.data[LABEL_LAB_IFLD]);
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if (Inter::Symbols::is_label(label) == FALSE) { *E = Inter::Frame::error(&P, I"no such label", NULL); return; }
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}
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void Inter::Lab::write(inter_construct *IC, OUTPUT_STREAM, inter_frame P, inter_error_message **E) {
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inter_package *pack = Inter::Packages::container(P);
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inter_symbol *routine = pack->package_name;
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inter_symbol *label = Inter::SymbolsTables::local_symbol_from_id(routine, P.data[LABEL_LAB_IFLD]);
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if (label) {
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WRITE("lab %S", label->symbol_name);
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} else { *E = Inter::Frame::error(&P, I"cannot write lab", NULL); return; }
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}
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inter_symbol *Inter::Lab::label_symbol(inter_frame P) {
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inter_package *pack = Inter::Packages::container(P);
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inter_symbol *routine = pack->package_name;
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if (Inter::Package::is(routine) == FALSE) internal_error("bad lab");
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inter_symbol *lab = Inter::SymbolsTables::local_symbol_from_id(routine, P.data[LABEL_LAB_IFLD]);
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if (lab == NULL) internal_error("bad lab");
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return lab;
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}
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