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inform7/inter/inter-module/Chapter 4/The Response Construct.w
2019-02-05 00:44:07 +00:00

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[Inter::Response::] The Response Construct.
Defining the response construct.
@
@e RESPONSE_IST
=
void Inter::Response::define(void) {
Inter::Defn::create_construct(
RESPONSE_IST,
L"response (%i+) (%i+) (%d+) = (%c+)",
&Inter::Response::read,
NULL,
&Inter::Response::verify,
&Inter::Response::write,
NULL,
NULL,
NULL,
&Inter::Response::show_dependencies,
I"response", I"responses");
}
@
@d DEFN_RESPONSE_IFLD 2
@d RULE_RESPONSE_IFLD 3
@d MARKER_RESPONSE_IFLD 4
@d VAL1_RESPONSE_IFLD 5
@d VAL2_RESPONSE_IFLD 6
@d EXTENT_RESPONSE_IFR 7
=
inter_error_message *Inter::Response::read(inter_reading_state *IRS, inter_line_parse *ilp, inter_error_location *eloc) {
inter_error_message *E = Inter::Defn::vet_level(IRS, RESPONSE_IST, ilp->indent_level, eloc);
if (E) return E;
inter_symbol *resp_name = Inter::Textual::new_symbol(eloc, Inter::Bookmarks::scope(IRS), ilp->mr.exp[0], &E);
if (E) return E;
inter_symbol *rule_name = Inter::Textual::find_symbol(IRS->read_into, eloc, Inter::Bookmarks::scope(IRS), ilp->mr.exp[1], CONSTANT_IST, &E);
if (E) return E;
inter_t n1 = UNDEF_IVAL, n2 = 0;
E = Inter::Types::read(ilp->line, eloc, IRS->read_into, IRS->current_package, NULL, ilp->mr.exp[2], &n1, &n2, Inter::Bookmarks::scope(IRS));
if (E) return E;
if ((n1 != LITERAL_IVAL) || (n2 >= 26))
return Inter::Errors::plain(I"response marker out of range", eloc);
inter_symbol *val_name = Inter::Textual::find_symbol(IRS->read_into, eloc, Inter::Bookmarks::scope(IRS), ilp->mr.exp[3], CONSTANT_IST, &E);
if (E) return E;
inter_t v1 = 0, v2 = 0;
Inter::Symbols::to_data(IRS->read_into, IRS->current_package, val_name, &v1, &v2);
return Inter::Response::new(IRS, Inter::SymbolsTables::id_from_IRS_and_symbol(IRS, resp_name), Inter::SymbolsTables::id_from_IRS_and_symbol(IRS, rule_name), n2, v1, v2, (inter_t) ilp->indent_level, eloc);
}
inter_error_message *Inter::Response::new(inter_reading_state *IRS, inter_t SID, inter_t RID, inter_t marker, inter_t v1, inter_t v2, inter_t level, inter_error_location *eloc) {
inter_frame P = Inter::Frame::fill_5(IRS, RESPONSE_IST, SID, RID, marker, v1, v2, eloc, level);
inter_error_message *E = Inter::Defn::verify_construct(P); if (E) return E;
Inter::Frame::insert(P, IRS);
return NULL;
}
inter_error_message *Inter::Response::verify(inter_frame P) {
if (P.extent != EXTENT_RESPONSE_IFR) return Inter::Frame::error(&P, I"extent wrong", NULL);
inter_error_message *E = Inter::Verify::defn(P, DEFN_RESPONSE_IFLD); if (E) return E;
// E = Inter::Verify::symbol(P, P.data[RULE_RESPONSE_IFLD], CONSTANT_IST); if (E) return E;
if (P.data[MARKER_RESPONSE_IFLD] >= 26) return Inter::Errors::plain(I"response marker out of range", NULL);
return NULL;
}
inter_error_message *Inter::Response::write(OUTPUT_STREAM, inter_frame P) {
inter_symbol *resp_name = Inter::SymbolsTables::symbol_from_frame_data(P, DEFN_RESPONSE_IFLD);
inter_symbol *rule_name = Inter::SymbolsTables::symbol_from_frame_data(P, RULE_RESPONSE_IFLD);
if ((resp_name) && (rule_name)) {
WRITE("response %S %S %d = ", resp_name->symbol_name, rule_name->symbol_name, P.data[MARKER_RESPONSE_IFLD]);
Inter::Types::write(OUT, P.repo_segment->owning_repo, NULL,
P.data[VAL1_RESPONSE_IFLD], P.data[VAL1_RESPONSE_IFLD+1], Inter::Packages::scope_of(P), FALSE);
} else {
return Inter::Frame::error(&P, I"response can't be written", NULL);
}
return NULL;
}
void Inter::Response::show_dependencies(inter_frame P, void (*callback)(struct inter_symbol *, struct inter_symbol *, void *), void *state) {
inter_symbol *resp_name = Inter::SymbolsTables::symbol_from_frame_data(P, DEFN_RESPONSE_IFLD);
inter_symbol *rule_name = Inter::SymbolsTables::symbol_from_frame_data(P, RULE_RESPONSE_IFLD);
if ((resp_name) && (rule_name)) {
(*callback)(rule_name, resp_name, state);
inter_t v1 = P.data[VAL1_RESPONSE_IFLD], v2 = P.data[VAL1_RESPONSE_IFLD+1];
inter_symbol *S = Inter::SymbolsTables::symbol_from_data_pair_and_frame(v1, v2, P);
if (S) (*callback)(resp_name, S, state);
}
}