| /* Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define C_LUCY_SORTCACHE |
| #include "Lucy/Util/ToolSet.h" |
| |
| #include "Lucy/Index/SortCache.h" |
| #include "Lucy/Plan/FieldType.h" |
| |
| SortCache* |
| SortCache_init(SortCache *self, const CharBuf *field, FieldType *type, |
| void *ords, int32_t cardinality, int32_t doc_max, int32_t null_ord, |
| int32_t ord_width) { |
| // Init. |
| self->native_ords = false; |
| |
| // Assign. |
| if (!FType_Sortable(type)) { |
| THROW(ERR, "Non-sortable FieldType for %o", field); |
| } |
| self->field = CB_Clone(field); |
| self->type = (FieldType*)INCREF(type); |
| self->ords = ords; |
| self->cardinality = cardinality; |
| self->doc_max = doc_max; |
| self->null_ord = null_ord; |
| self->ord_width = ord_width; |
| |
| ABSTRACT_CLASS_CHECK(self, SORTCACHE); |
| return self; |
| } |
| |
| void |
| SortCache_destroy(SortCache *self) { |
| DECREF(self->field); |
| DECREF(self->type); |
| SUPER_DESTROY(self, SORTCACHE); |
| } |
| |
| bool_t |
| SortCache_get_native_ords(SortCache *self) { |
| return self->native_ords; |
| } |
| |
| void |
| SortCache_set_native_ords(SortCache *self, bool_t native_ords) { |
| self->native_ords = native_ords; |
| } |
| |
| int32_t |
| SortCache_ordinal(SortCache *self, int32_t doc_id) { |
| if ((uint32_t)doc_id > (uint32_t)self->doc_max) { |
| THROW(ERR, "Out of range: %i32 > %i32", doc_id, self->doc_max); |
| } |
| switch (self->ord_width) { |
| case 1: return NumUtil_u1get(self->ords, doc_id); |
| case 2: return NumUtil_u2get(self->ords, doc_id); |
| case 4: return NumUtil_u4get(self->ords, doc_id); |
| case 8: { |
| uint8_t *ints = (uint8_t*)self->ords; |
| return ints[doc_id]; |
| } |
| case 16: |
| if (self->native_ords) { |
| uint16_t *ints = (uint16_t*)self->ords; |
| return ints[doc_id]; |
| } |
| else { |
| uint8_t *bytes = (uint8_t*)self->ords; |
| bytes += doc_id * sizeof(uint16_t); |
| return NumUtil_decode_bigend_u16(bytes); |
| } |
| case 32: |
| if (self->native_ords) { |
| uint32_t *ints = (uint32_t*)self->ords; |
| return ints[doc_id]; |
| } |
| else { |
| uint8_t *bytes = (uint8_t*)self->ords; |
| bytes += doc_id * sizeof(uint32_t); |
| return NumUtil_decode_bigend_u32(bytes); |
| } |
| default: { |
| THROW(ERR, "Invalid ord width: %i32", self->ord_width); |
| UNREACHABLE_RETURN(int32_t); |
| } |
| } |
| } |
| |
| int32_t |
| SortCache_find(SortCache *self, Obj *term) { |
| FieldType *const type = self->type; |
| int32_t lo = 0; |
| int32_t hi = self->cardinality - 1; |
| int32_t result = -100; |
| Obj *blank = SortCache_Make_Blank(self); |
| |
| if (term != NULL |
| && !Obj_Is_A(term, Obj_Get_VTable(blank)) |
| && !Obj_Is_A(blank, Obj_Get_VTable(term)) |
| ) { |
| THROW(ERR, "SortCache error for field %o: term is a %o, and not " |
| "comparable to a %o", self->field, Obj_Get_Class_Name(term), |
| Obj_Get_Class_Name(blank)); |
| } |
| |
| // Binary search. |
| while (hi >= lo) { |
| const int32_t mid = lo + ((hi - lo) / 2); |
| Obj *val = SortCache_Value(self, mid, blank); |
| int32_t comparison = FType_null_back_compare_values(type, term, val); |
| if (comparison < 0) { |
| hi = mid - 1; |
| } |
| else if (comparison > 0) { |
| lo = mid + 1; |
| } |
| else { |
| result = mid; |
| break; |
| } |
| } |
| |
| DECREF(blank); |
| |
| if (hi < 0) { |
| // Target is "less than" the first cache entry. |
| return -1; |
| } |
| else if (result == -100) { |
| // If result is still -100, it wasn't set. |
| return hi; |
| } |
| else { |
| return result; |
| } |
| } |
| |
| void* |
| SortCache_get_ords(SortCache *self) { |
| return self->ords; |
| } |
| |
| int32_t |
| SortCache_get_cardinality(SortCache *self) { |
| return self->cardinality; |
| } |
| |
| int32_t |
| SortCache_get_null_ord(SortCache *self) { |
| return self->null_ord; |
| } |
| |
| int32_t |
| SortCache_get_ord_width(SortCache *self) { |
| return self->ord_width; |
| } |
| |
| |