/usr/share/gocode/src/github.com/lunny/nodb/util.go is in golang-github-lunny-nodb-dev 0.0~git20160621.0.fc1ef06-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | package nodb
import (
"encoding/binary"
"errors"
"reflect"
"strconv"
"unsafe"
)
var errIntNumber = errors.New("invalid integer")
// no copy to change slice to string
// use your own risk
func String(b []byte) (s string) {
pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
pstring := (*reflect.StringHeader)(unsafe.Pointer(&s))
pstring.Data = pbytes.Data
pstring.Len = pbytes.Len
return
}
// no copy to change string to slice
// use your own risk
func Slice(s string) (b []byte) {
pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
pstring := (*reflect.StringHeader)(unsafe.Pointer(&s))
pbytes.Data = pstring.Data
pbytes.Len = pstring.Len
pbytes.Cap = pstring.Len
return
}
func Int64(v []byte, err error) (int64, error) {
if err != nil {
return 0, err
} else if v == nil || len(v) == 0 {
return 0, nil
} else if len(v) != 8 {
return 0, errIntNumber
}
return int64(binary.LittleEndian.Uint64(v)), nil
}
func PutInt64(v int64) []byte {
var b []byte
pbytes := (*reflect.SliceHeader)(unsafe.Pointer(&b))
pbytes.Data = uintptr(unsafe.Pointer(&v))
pbytes.Len = 8
pbytes.Cap = 8
return b
}
func StrInt64(v []byte, err error) (int64, error) {
if err != nil {
return 0, err
} else if v == nil {
return 0, nil
} else {
return strconv.ParseInt(String(v), 10, 64)
}
}
func StrInt32(v []byte, err error) (int32, error) {
if err != nil {
return 0, err
} else if v == nil {
return 0, nil
} else {
res, err := strconv.ParseInt(String(v), 10, 32)
return int32(res), err
}
}
func StrInt8(v []byte, err error) (int8, error) {
if err != nil {
return 0, err
} else if v == nil {
return 0, nil
} else {
res, err := strconv.ParseInt(String(v), 10, 8)
return int8(res), err
}
}
func StrPutInt64(v int64) []byte {
return strconv.AppendInt(nil, v, 10)
}
func MinUInt32(a uint32, b uint32) uint32 {
if a > b {
return b
} else {
return a
}
}
func MaxUInt32(a uint32, b uint32) uint32 {
if a > b {
return a
} else {
return b
}
}
func MaxInt32(a int32, b int32) int32 {
if a > b {
return a
} else {
return b
}
}
|