tile38/vendor/github.com/tidwall/rtree/gen/gen.go

88 lines
2.3 KiB
Go

package main
import (
"flag"
"io/ioutil"
"log"
"os"
"strconv"
"strings"
)
func main() {
var dims int
var debug bool
flag.IntVar(&dims, "dims", 4, "number of dimensions")
flag.BoolVar(&debug, "debug", false, "turn on debug tracing")
flag.Parse()
// process rtree.go
data, err := ioutil.ReadFile("src/rtree.go")
if err != nil {
log.Fatal(err)
}
data = []byte(strings.Replace(string(data), "// +build ignore", "// generated; DO NOT EDIT!", -1))
if debug {
data = []byte(strings.Replace(string(data), "TDEBUG", "true", -1))
} else {
data = []byte(strings.Replace(string(data), "TDEBUG", "false", -1))
}
var dimouts = make([]string, dims)
var output string
var recording bool
lines := strings.Split(string(data), "\n")
for _, line := range lines {
if strings.HasPrefix(strings.TrimSpace(line), "//") {
idx := strings.Index(line, "//")
switch strings.ToUpper(strings.TrimSpace(line[idx+2:])) {
case "BEGIN":
recording = true
for i := 0; i < len(dimouts); i++ {
dimouts[i] = ""
}
continue
case "END":
for _, out := range dimouts {
if out != "" {
output += out
}
}
recording = false
continue
}
}
if recording {
for i := 0; i < len(dimouts); i++ {
dimouts[i] += strings.Replace(line, "TNUMDIMS", strconv.FormatInt(int64(i+1), 10), -1) + "\n"
}
} else {
output += line + "\n"
}
}
// process rtree_base.go
if err := os.RemoveAll("../dims"); err != nil {
log.Fatal(err)
}
for i := 0; i < dims; i++ {
sdim := strconv.FormatInt(int64(i+1), 10)
data, err := ioutil.ReadFile("src/rtree_base.go")
if err != nil {
log.Fatal(err)
}
data = []byte(strings.Split(string(data), "// FILE_START")[1])
if debug {
data = []byte(strings.Replace(string(data), "TDEBUG", "true", -1))
} else {
data = []byte(strings.Replace(string(data), "TDEBUG", "false", -1))
}
data = []byte(strings.Replace(string(data), "TNUMDIMS", strconv.FormatInt(int64(i+1), 10), -1))
data = []byte(strings.Replace(string(data), "DD_", "d"+strconv.FormatInt(int64(i+1), 10), -1))
if err := os.MkdirAll("../dims/d"+sdim, 0777); err != nil {
log.Fatal(err)
}
output = string(append([]byte(output), data...))
}
if err := ioutil.WriteFile("../rtree.go", []byte(output), 0666); err != nil {
log.Fatal(err)
}
}