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package utils
import (
"bytes"
"os"
"unsafe"
"github.com/pektezol/bitreader"
)
func CheckError(e error) {
if e != nil {
panic(e)
}
}
func ReadByteFromFile(file *os.File, size int32) []byte {
tmp := make([]byte, size)
file.Read(tmp)
return tmp
}
func ReadStringFromFile(file *os.File) string {
var output string
reader := bitreader.Reader(file, true)
for {
value, err := reader.ReadBytes(1)
CheckError(err)
if value == 0 {
break
}
output += string(rune(value))
}
return output
}
func ReadStringFromSlice(file []byte) string {
var output string
reader := bitreader.Reader(bytes.NewReader(file), true)
for {
value, err := reader.ReadBytes(1)
CheckError(err)
if value == 0 {
break
}
output += string(rune(value))
}
return output
}
func FloatArrFromBytes(byteArr []byte) []float32 {
if len(byteArr) == 0 {
return nil
}
l := len(byteArr) / 4
ptr := unsafe.Pointer(&byteArr[0])
// It is important to keep in mind that the Go garbage collector
// will not interact with this data, and that if src if freed,
// the behavior of any Go code using the slice is nondeterministic.
// Reference: https://github.com/golang/go/wiki/cgo#turning-c-arrays-into-go-slices
return (*[1 << 26]float32)((*[1 << 26]float32)(ptr))[:l:l]
}
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