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main.go
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main.go
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package main
/* This program generate tests values for oracle NUMBER type
*/
import (
"database/sql"
"errors"
"fmt"
"math"
"os"
"strconv"
"strings"
"text/template"
_ "github.com/vtov-kr/go-ora/v2"
)
var testValues = []struct {
asString string
asFloat float64
}{
{"0", 0},
{"1", 1},
{"10", 10},
{"100", 100},
{"1000", 1000},
{"10000000", 10000000},
{"1E+30", 1e+30},
{"1E+125", 1e+125},
{"0.1", 0.1},
{"0.01", 0.01},
{"0.001", 0.001},
{"0.0001", 0.0001},
{"0.00001", 0.00001},
{"0.000001", 0.000001},
{"1E+125", 1e125},
{"1E-125", 1e-125},
{"-1E+125", -1e125},
{"-1E-125", -1e-125},
{"1.23456789e15", 1.23456789e+15},
{"1.23456789e-15", 1.23456789e-15},
{"1.234", 1.234},
{"12.34", 12.34},
{"123.4", 123.4},
{"1234", 1234},
{"12340", 12340},
{"123400", 123400},
{"1234000", 1234000},
{"12340000", 12340000},
{"0.1234", 0.1234},
{"0.01234", 0.01234},
{"0.001234", 0.001234},
{"0.0001234", 0.0001234},
{"0.00001234", 0.00001234},
{"0.000001234", 0.000001234},
{"-1.234", -1.234},
{"-12.34", -12.34},
{"-123.4", -123.4},
{"-1234", -1234},
{"-12340", -12340},
{"-123400", -123400},
{"-1234000", -1234000},
{"-12340000", -12340000},
{"-0.1234", -0.1234},
{"-1.234", -1.234},
{"-12.34", -12.34},
{"-123.4", -123.4},
{"-1234", -1234},
{"-12340", -12340},
{"-123400", -123400},
{"-1234000", -1234000},
{"9.8765", 9.8765},
{"98.765", 98.765},
{"987.65", 987.65},
{"9876.5", 9876.5},
{"98765", 98765},
{"987650", 987650},
{"9876500", 9876500},
{"0.98765", 0.98765},
{"0.098765", 0.098765},
{"0.0098765", 0.0098765},
{"0.00098765", 0.00098765},
{"0.000098765", 0.000098765},
{"0.0000098765", 0.0000098765},
{"0.00000098765", 0.00000098765},
{"-9.8765", -9.8765},
{"-98.765", -98.765},
{"-987.65", -987.65},
{"-9876.5", -9876.5},
{"-98765", -98765},
{"-987650", -987650},
{"-9876500", -9876500},
{"-98765000", -98765000},
{"-0.98765", -0.98765},
{"-0.098765", -0.098765},
{"-0.0098765", -0.0098765},
{"-0.00098765", -0.00098765},
{"-0.000098765", -0.000098765},
{"-0.0000098765", -0.0000098765},
{"-0.00000098765", -0.00000098765},
{"2*asin(1)", 2. * math.Asin(1.0)},
{"1/3", 1.0 / 3.0},
{"-1/3", -1.0 / 3.0},
{"9000000000000000000", 9000000000000000000},
{"-9000000000000000000", -9000000000000000000},
// {"9223372036854774784", 9223372036854774784},
// {"-9223372036854774784", -9223372036854774784},
// {"-1000000000000000000", -1000000000000000000},
// {"9223372036854775805", 9223372036854775805},
// {"9223372036854775807", 9223372036854775807},
// {"-9223372036854775806", -9223372036854775806},
// {"-9223372036854775808", -9223372036854775808},
}
func checkErr(err error) {
if err != nil {
fmt.Println(err)
os.Exit(1)
}
}
type tmplRow struct {
SelectText string
OracleText string
Float float64
Integer int64
IsInteger bool
Binary string
}
const (
maxConvertibleInt = 9223372036854774784
)
func main() {
packageName := "converters"
if len(os.Args) >= 2 {
packageName = os.Args[1]
}
connStr := os.Getenv("GOORA_TESTDB")
if connStr == "" {
checkErr(fmt.Errorf("Provide oracle server url in environment variable GOORA_TESTDB"))
}
conn, err := sql.Open("oracle", connStr)
checkErr(err)
defer conn.Close()
result := []tmplRow{}
for _, tt := range testValues {
query := fmt.Sprintf("select N||'' S, N, dump(n) D from (select %s N from DUAL)", tt.asString)
stmt, err := conn.Prepare(query)
checkErr(err)
fmt.Println(query)
rows, err := stmt.Query()
checkErr(err)
if !rows.Next() {
checkErr(fmt.Errorf("Query: %s must return a row", query))
}
var (
asString string
asFloat float64
asInt64 int64
isInteger bool
dump string
)
err = rows.Scan(&asString, &asFloat, &dump)
checkErr(err)
// Check oracle representation to test if number is Int
if i := strings.Index(asString, "."); i == -1 {
isInteger = true
asInt64, err = strconv.ParseInt(asString, 10, 64)
if err != nil || asInt64 >= 9000000000000000000 || asInt64 <= -9000000000000000000 {
if err != nil && !errors.Is(err, strconv.ErrRange) {
checkErr(err)
}
isInteger = false
asInt64 = 0
err = nil
}
}
if i := strings.Index(dump, ": "); i > 0 {
dump = dump[i+2:]
}
result = append(result, tmplRow{
tt.asString,
asString,
tt.asFloat,
asInt64,
isInteger,
dump,
})
rows.Close()
stmt.Close()
}
outFile := "testfloatsvalues.go"
if len(os.Args) > 3 {
outFile = os.Args[2]
}
out, err := os.Create(outFile)
checkErr(err)
defer out.Close()
tmpltext := `package {{.Package}}
/* This file is generated.
move to converters directory and
go run .\generatefloat\main.go {{.Package}}
*/
var TestFloatValue = []struct {
SelectText string
OracleText string
Float float64
Integer int64
IsInteger bool
Binary []byte
}{
{{- range .Values}}
{ "{{.SelectText}}", "{{.OracleText}}", {{printf "%g" .Float}}, {{.Integer}}, {{.IsInteger}}, []byte{ {{.Binary}} } }, // {{printf "%e" .Float}}
{{- end }}
}`
tmpl, err := template.New("master").Parse(tmpltext)
checkErr(err)
err = tmpl.Execute(out, struct {
Package string
Values []tmplRow
}{packageName, result})
}