103 lines
3.3 KiB
C
103 lines
3.3 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TD_SCHEMA_H_
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#define _TD_SCHEMA_H_
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#include "os.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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// ----------------- TSDB COLUMN DEFINITION
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typedef struct {
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int8_t type; // Column type
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int16_t colId; // column ID
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int16_t bytes; // column bytes (restore to int16_t in case of misuse)
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uint16_t offset; // point offset in SDataRow after the header part.
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} STColumn;
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#define colType(col) ((col)->type)
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#define colColId(col) ((col)->colId)
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#define colBytes(col) ((col)->bytes)
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#define colOffset(col) ((col)->offset)
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#define colSetType(col, t) (colType(col) = (t))
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#define colSetColId(col, id) (colColId(col) = (id))
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#define colSetBytes(col, b) (colBytes(col) = (b))
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#define colSetOffset(col, o) (colOffset(col) = (o))
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// ----------------- TSDB SCHEMA DEFINITION
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typedef struct {
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int version; // version
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int numOfCols; // Number of columns appended
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int tlen; // maximum length of a SDataRow without the header part (sizeof(VarDataOffsetT) + sizeof(VarDataLenT) + //
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// (bytes))
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uint16_t flen; // First part length in a SDataRow after the header part
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uint16_t vlen; // pure value part length, excluded the overhead (bytes only)
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STColumn columns[];
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} STSchema;
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#define schemaNCols(s) ((s)->numOfCols)
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#define schemaVersion(s) ((s)->version)
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#define schemaTLen(s) ((s)->tlen)
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#define schemaFLen(s) ((s)->flen)
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#define schemaVLen(s) ((s)->vlen)
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#define schemaColAt(s, i) ((s)->columns + i)
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#define tdFreeSchema(s) tfree((s))
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STSchema *tdDupSchema(STSchema *pSchema);
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int tdEncodeSchema(void **buf, STSchema *pSchema);
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void * tdDecodeSchema(void *buf, STSchema **pRSchema);
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static FORCE_INLINE int comparColId(const void *key1, const void *key2) {
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if (*(int16_t *)key1 > ((STColumn *)key2)->colId) {
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return 1;
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} else if (*(int16_t *)key1 < ((STColumn *)key2)->colId) {
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return -1;
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} else {
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return 0;
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}
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}
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static FORCE_INLINE STColumn *tdGetColOfID(STSchema *pSchema, int16_t colId) {
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void *ptr = bsearch(&colId, (void *)pSchema->columns, schemaNCols(pSchema), sizeof(STColumn), comparColId);
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if (ptr == NULL) return NULL;
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return (STColumn *)ptr;
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}
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// ----------------- SCHEMA BUILDER DEFINITION
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typedef struct {
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int tCols;
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int nCols;
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int tlen;
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uint16_t flen;
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uint16_t vlen;
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int version;
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STColumn *columns;
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} STSchemaBuilder;
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int tdInitTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version);
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void tdDestroyTSchemaBuilder(STSchemaBuilder *pBuilder);
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void tdResetTSchemaBuilder(STSchemaBuilder *pBuilder, int32_t version);
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int tdAddColToSchema(STSchemaBuilder *pBuilder, int8_t type, int16_t colId, int16_t bytes);
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STSchema *tdGetSchemaFromBuilder(STSchemaBuilder *pBuilder);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_TD_SCHEMA_H_*/ |