static InverterEntry*
S_fetch_entry(InverterIVARS *ivars, CharBuf *field) {
Schema *const schema = ivars->schema;
int32_t field_num = Seg_Field_Num(ivars->segment, field);
if (!field_num) {
// This field seems not to be in the segment yet. Try to find it in
// the Schema.
if (Schema_Fetch_Type(schema, field)) {
// The field is in the Schema. Get a field num from the Segment.
field_num = Seg_Add_Field(ivars->segment, field);
}
else {
// We've truly failed to find the field. The user must
// not have spec'd it.
THROW(ERR, "Unknown field name: '%o'", field);
}
}
InverterEntry *entry
= (InverterEntry*)VA_Fetch(ivars->entry_pool, field_num);
if (!entry) {
entry = InvEntry_new(schema, (CharBuf*)field, field_num);
VA_Store(ivars->entry_pool, field_num, (Obj*)entry);
}
return entry;
}
Inverter*
Inverter_init(Inverter *self, Schema *schema, Segment *segment) {
InverterIVARS *const ivars = Inverter_IVARS(self);
// Init.
ivars->tick = -1;
ivars->doc = NULL;
ivars->sorted = false;
ivars->blank = InvEntry_new(NULL, NULL, 0);
ivars->current = ivars->blank;
// Derive.
ivars->entry_pool = VA_new(Schema_Num_Fields(schema));
ivars->entries = VA_new(Schema_Num_Fields(schema));
// Assign.
ivars->schema = (Schema*)INCREF(schema);
ivars->segment = (Segment*)INCREF(segment);
return self;
}
