89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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typedef struct SUdfInit{
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int maybe_null; /* 1 if function can return NULL */
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int decimals; /* for real functions */
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long long length; /* For string functions */
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char *ptr; /* free pointer for function data */
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int const_item; /* 0 if result is independent of arguments */
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} SUdfInit;
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#define TSDB_DATA_INT_NULL 0x80000000LL
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#define TSDB_DATA_BIGINT_NULL 0x8000000000000000LL
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void abs_max(char* data, short itype, short ibytes, int numOfRows, long long* ts, char* dataOutput, char* interBuf, char* tsOutput,
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int* numOfOutput, short otype, short obytes, SUdfInit* buf) {
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int i;
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int r = 0;
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printf("abs_max input data:%p, type:%d, rows:%d, ts:%p,%lld, dataoutput:%p, tsOutput:%p, numOfOutput:%p, buf:%p\n", data, itype, numOfRows, ts, *ts, dataOutput, tsOutput, numOfOutput, buf);
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if (itype == 5) {
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r=*(long *)dataOutput;
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*numOfOutput=0;
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for(i=0;i<numOfRows;++i) {
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if (*((long *)data + i) == TSDB_DATA_BIGINT_NULL) {
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continue;
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}
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*numOfOutput=1;
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long v = abs(*((long *)data + i));
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if (v > r) {
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r = v;
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}
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}
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*(long *)dataOutput=r;
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printf("abs_max out, dataoutput:%ld, numOfOutput:%d\n", *(long *)dataOutput, *numOfOutput);
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}
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}
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void abs_max_finalize(char* dataOutput, char* interBuf, int* numOfOutput, SUdfInit* buf) {
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int i;
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int r = 0;
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printf("abs_max_finalize dataoutput:%p:%d, numOfOutput:%d, buf:%p\n", dataOutput, *dataOutput, *numOfOutput, buf);
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*numOfOutput=1;
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printf("abs_max finalize, dataoutput:%ld, numOfOutput:%d\n", *(long *)dataOutput, *numOfOutput);
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}
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void abs_max_merge(char* data, int32_t numOfRows, char* dataOutput, int32_t* numOfOutput, SUdfInit* buf) {
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int r = 0;
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if (numOfRows > 0) {
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r = *((long *)data);
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}
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printf("abs_max_merge numOfRows:%d, dataoutput:%p, buf:%p\n", numOfRows, dataOutput, buf);
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for (int i = 1; i < numOfRows; ++i) {
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printf("abs_max_merge %d - %ld\n", i, *((long *)data + i));
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if (*((long*)data + i) > r) {
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r= *((long*)data + i);
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}
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}
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*(long*)dataOutput=r;
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if (numOfRows > 0) {
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*numOfOutput=1;
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} else {
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*numOfOutput=0;
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}
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printf("abs_max_merge, dataoutput:%ld, numOfOutput:%d\n", *(long *)dataOutput, *numOfOutput);
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}
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int abs_max_init(SUdfInit* buf) {
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printf("abs_max init\n");
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return 0;
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}
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void abs_max_destroy(SUdfInit* buf) {
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printf("abs_max destroy\n");
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}
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