static void avgFinalize(sqlite_func *context){
SumCtx *p;
p = sqlite_aggregate_context(context, sizeof(*p));
if( p && p->cnt>0 ){
sqlite_set_result_double(context, p->sum/(double)p->cnt);
}
}
/*
** julianday( TIMESTRING, MOD, MOD, ...)
**
** Return the julian day number of the date specified in the arguments
*/
static void juliandayFunc(sqlite_func *context, int argc, const char **argv){
DateTime x;
if( isDate(argc, argv, &x)==0 ){
computeJD(&x);
sqlite_set_result_double(context, x.rJD);
}
}
static void stdDevFinalize(sqlite_func *context){
double rN = sqlite_aggregate_count(context);
StdDevCtx *p = sqlite_aggregate_context(context, sizeof(*p));
if( p && p->cnt>1 ){
double rCnt = cnt;
sqlite_set_result_double(context,
sqrt((p->sum2 - p->sum*p->sum/rCnt)/(rCnt-1.0)));
}
}
/*
** The following routine is a user-defined SQL function whose purpose
** is to test the sqlite_set_result() API.
*/
static void testFunc(sqlite_func *context, int argc, const char **argv){
while( argc>=2 ){
if( argv[0]==0 ){
sqlite_set_result_error(context, "first argument to test function "
"may not be NULL", -1);
}else if( sqliteStrICmp(argv[0],"string")==0 ){
sqlite_set_result_string(context, argv[1], -1);
}else if( argv[1]==0 ){
sqlite_set_result_error(context, "2nd argument may not be NULL if the "
"first argument is not \"string\"", -1);
}else if( sqliteStrICmp(argv[0],"int")==0 ){
sqlite_set_result_int(context, atoi(argv[1]));
}else if( sqliteStrICmp(argv[0],"double")==0 ){
sqlite_set_result_double(context, sqliteAtoF(argv[1], 0));
}else{
sqlite_set_result_error(context,"first argument should be one of: "
"string int double", -1);
}
argc -= 2;
argv += 2;
}
}
static void sumFinalize(sqlite_func *context){
SumCtx *p;
p = sqlite_aggregate_context(context, sizeof(*p));
sqlite_set_result_double(context, p ? p->sum : 0.0);
}
