func (self *Connection) buildFields(result *C.MYSQL_RES) (fields []Field) {
nfields := int(C.mysql_num_fields(result))
cfieldsptr := C.mysql_fetch_fields(result)
cfields := (*[1 << 30]C.MYSQL_FIELD)(unsafe.Pointer(cfieldsptr))
arena := hack.NewStringArena(1024) // prealloc a reasonable amount of space
fields = make([]Field, nfields)
for i := 0; i < nfields; i++ {
length := strlen(cfields[i].name)
fname := (*[1 << 30]byte)(unsafe.Pointer(cfields[i].name))[:length]
fields[i].Name = arena.NewString(fname)
fields[i].Type = int64(cfields[i]._type)
}
return fields
}
func (self *Connection) fetchNext(result *C.MYSQL_RES, colCount int) (row []interface{}) {
rowPtr := (*[1 << 30]*[1 << 30]byte)(unsafe.Pointer(C.mysql_fetch_row(result)))
if rowPtr == nil {
panic(self.lastError(nil))
}
row = make([]interface{}, colCount)
lengths := (*[1 << 30]uint64)(unsafe.Pointer(C.mysql_fetch_lengths(result)))
totalLength := uint64(0)
for i := 0; i < colCount; i++ {
totalLength += (*lengths)[i]
}
arena := hack.NewStringArena(int(totalLength))
for i := 0; i < colCount; i++ {
colLength := (*lengths)[i]
colPtr := (*rowPtr)[i]
if colPtr == nil {
continue
}
row[i] = arena.NewString((*colPtr)[:colLength])
}
return row
}