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//
// Copyright 2020-2022 Sean C Foley
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package main
import (
"bufio"
"io/ioutil"
"log"
"os"
"strconv"
"strings"
)
func main() {
path := "ipaddr/"
mappings, err := readPropertiesFile(path + "IPAddressResources.properties")
if err != nil {
log.Fatal(err)
}
source := writeSourceFile(mappings)
_ = ioutil.WriteFile(path+"ipaddressresources.go", source, 0644)
}
func writeSourceFile(mappings map[string]string) []byte {
indexMappings := make(map[string]int)
indices := make([]int, len(mappings))
valsArray := make([]string, len(mappings))
i := 0
valLen := 0
// create the mappings from string to index into slice, from slice entry to string index
for key, val := range mappings {
indexMappings[key] = i
indices[i] = valLen
valsArray[i] = val
valLen += len(val)
i++
}
// now prepare the source code for each of the three elements, the map, the slice, and the string
mappingsStr := "\n"
for key, val := range indexMappings {
mappingsStr += "`" + key + "`: " + strconv.Itoa(val) + ",\n"
}
indicesStr := ""
for i, val := range indices {
if i%10 == 0 {
indicesStr += "\n"
}
indicesStr += strconv.Itoa(val) + ","
}
strStr := "\n"
for i, val := range valsArray {
if i > 0 {
strStr += "+\n"
}
strStr += "`" + val + "`"
}
bytes :=
`//
// Copyright 2020-2022 Sean C Foley
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Code generated by running convert.go from the go workspace directory (the one containing the src folder). Do not edit.
package ipaddr
var keyStrMap = map[string]int {` + mappingsStr + `
}
var strIndices = []int{` + indicesStr + `
}
var strVals =` + strStr + `
func lookupStr(key string) (result string) {
if index, ok := keyStrMap[key]; ok {
start, end := strIndices[index], strIndices[index+1]
result = strVals[start:end]
}
return
}
`
return []byte(bytes)
}
func readPropertiesFile(filename string) (map[string]string, error) {
config := make(map[string]string)
file, err := os.Open(filename)
if err != nil {
return nil, err
}
defer func() { _ = file.Close() }()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
line = strings.TrimSpace(line)
if len(line) > 0 {
firstChar := line[0]
if firstChar != '#' && firstChar != '=' {
if divIndex := strings.Index(line, "="); divIndex > 0 && divIndex < len(line)-1 {
key := line[:divIndex]
value := line[divIndex+1:]
config[key] = value
}
}
}
}
if err := scanner.Err(); err != nil {
return nil, err
}
return config, nil
}
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