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package main
import (
"os"
"strconv"
"github.com/boltdb/bolt"
)
// Pages prints a list of all pages in a database.
func Pages(path string) {
if _, err := os.Stat(path); os.IsNotExist(err) {
fatal(err)
return
}
db, err := bolt.Open(path, 0600, nil)
if err != nil {
fatal(err)
return
}
defer db.Close()
println("ID TYPE ITEMS OVRFLW")
println("======== ========== ====== ======")
db.Update(func(tx *bolt.Tx) error {
var id int
for {
p, err := tx.Page(id)
if err != nil {
fatalf("page error: %d: %s", id, err)
} else if p == nil {
break
}
// Only display count and overflow if this is a non-free page.
var count, overflow string
if p.Type != "free" {
count = strconv.Itoa(p.Count)
if p.OverflowCount > 0 {
overflow = strconv.Itoa(p.OverflowCount)
}
}
// Print table row.
printf("%-8d %-10s %-6s %-6s\n", p.ID, p.Type, count, overflow)
// Move to the next non-overflow page.
id += 1
if p.Type != "free" {
id += p.OverflowCount
}
}
return nil
})
}
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