/
updateCommon.go
65 lines (58 loc) · 1.67 KB
/
updateCommon.go
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// Copyright (c) 2016 OpenM++
// This code is licensed under the MIT license (see LICENSE.txt for details)
package db
import (
"container/list"
"hash"
)
// digestCells add hash of cells (parameter values, accumulators or expressions) to hash.
// It is a hash of text values identical to csv file hash, for example:
// acc_id,sub_id,dim0,dim1,acc_value\n
// 0,1,0,0,1234.5678\n
// Double format is used for float model types digest calculation, if non-empty format supplied
func digestCells(hSum hash.Hash, modelDef *ModelMeta, name string, cell CsvConverter, cellLst *list.List, doubleFmt string) error {
// append header, like: acc_id,sub_id,dim0,dim1,acc_value\n
cs, err := cell.CsvHeader(modelDef, name, true, "")
if err != nil {
return err
}
for k := range cs {
if k != 0 {
if _, err = hSum.Write([]byte(",")); err != nil {
return err
}
}
if _, err = hSum.Write([]byte(cs[k])); err != nil {
return err
}
}
if _, err = hSum.Write([]byte("\n")); err != nil {
return err
}
// append dimensions and value to digest
cvt, err := cell.CsvToIdRow(modelDef, name, doubleFmt, "") // converter from cell id's to csv row []string
if err != nil {
return err
}
for c := cellLst.Front(); c != nil; c = c.Next() {
// convert to strings
if err := cvt(c.Value, cs); err != nil {
return err
}
// append to digest
for k := range cs {
if k != 0 {
if _, err = hSum.Write([]byte(",")); err != nil {
return err
}
}
if _, err = hSum.Write([]byte(cs[k])); err != nil {
return err
}
}
if _, err = hSum.Write([]byte("\n")); err != nil {
return err
}
}
return nil
}