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add encode and decode functions

This commit is contained in:
hzcheng 2020-05-05 15:38:20 +08:00
parent 65169b0a82
commit 7dcbe81016
1 changed files with 124 additions and 0 deletions
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src/util/inc/tcoding.h Normal file
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/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TD_CODING_H_
#define _TD_CODING_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include <string.h>
#include "tutil.h"
const int TNUMBER = 1;
#define IS_LITTLE_ENDIAN() (*(char *)(&TNUMBER) != 0)
static FORCE_INLINE void *taosEncodeFixed16(void *buf, uint16_t value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(buf, &value, sizeof(value));
} else {
((char *)buf)[0] = value & 0xff;
((char *)buf)[1] = (value >> 8) & 0xff;
}
return POINTER_DRIFT(buf, sizeof(value));
}
static FORCE_INLINE void *taosEncodeFixed32(void *buf, uint32_t value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(buf, &value, sizeof(value));
} else {
((char *)buf)[0] = value & 0xff;
((char *)buf)[1] = (value >> 8) & 0xff;
((char *)buf)[2] = (value >> 16) & 0xff;
((char *)buf)[3] = (value >> 24) & 0xff;
}
return POINTER_DRIFT(buf, sizeof(value));
}
static FORCE_INLINE void *taosEncodeFixed64(void *buf, uint64_t value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(buf, &value, sizeof(value));
} else {
((char *)buf)[0] = value & 0xff;
((char *)buf)[1] = (value >> 8) & 0xff;
((char *)buf)[2] = (value >> 16) & 0xff;
((char *)buf)[3] = (value >> 24) & 0xff;
((char *)buf)[4] = (value >> 32) & 0xff;
((char *)buf)[5] = (value >> 40) & 0xff;
((char *)buf)[6] = (value >> 48) & 0xff;
((char *)buf)[7] = (value >> 56) & 0xff;
}
return POINTER_DRIFT(buf, sizeof(value));
}
static FORCE_INLINE void *taosDecodeFixed16(void *buf, uint16_t *value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(value, buf, sizeof(*value));
} else {
((char *)value)[1] = ((char *)buf)[0];
((char *)value)[0] = ((char *)buf)[1];
}
return POINTER_DRIFT(buf, sizeof(*value));
}
static FORCE_INLINE void *taosDecodeFixed32(void *buf, uint32_t *value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(value, buf, sizeof(*value));
} else {
((char *)value)[3] = ((char *)buf)[0];
((char *)value)[2] = ((char *)buf)[1];
((char *)value)[1] = ((char *)buf)[2];
((char *)value)[0] = ((char *)buf)[3];
}
return POINTER_DRIFT(buf, sizeof(*value));
}
static FORCE_INLINE void *taosDecodeFixed64(void *buf, uint64_t *value) {
if (IS_LITTLE_ENDIAN()) {
memcpy(value, buf, sizeof(*value));
} else {
((char *)value)[7] = ((char *)buf)[0];
((char *)value)[6] = ((char *)buf)[1];
((char *)value)[5] = ((char *)buf)[2];
((char *)value)[4] = ((char *)buf)[3];
((char *)value)[3] = ((char *)buf)[4];
((char *)value)[2] = ((char *)buf)[5];
((char *)value)[1] = ((char *)buf)[6];
((char *)value)[0] = ((char *)buf)[7];
}
return POINTER_DRIFT(buf, sizeof(*value));
}
// TODO
static FORCE_INLINE void *taosEncodeVariant16(void *buf, uint16_t value) {}
static FORCE_INLINE void *taosEncodeVariant32(void *buf, uint32_t value) {}
static FORCE_INLINE void *taosEncodeVariant64(void *buf, uint64_t value) {}
static FORCE_INLINE void *taosDecodeVariant16(void *buf, uint16_t *value) {}
static FORCE_INLINE void *taosDecodeVariant32(void *buf, uint32_t *value) {}
static FORCE_INLINE void *taosDecodeVariant64(void *buf, uint64_t *value) {}
#ifdef __cplusplus
}
#endif
#endif