You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
30 lines
546 B
Go
30 lines
546 B
Go
package parser
|
|
|
|
import (
|
|
"bytes"
|
|
"strconv"
|
|
)
|
|
|
|
// IsCallout detects a callout in the following format: <<N>> Where N is a integer > 0.
|
|
func IsCallout(data []byte) (id []byte, consumed int) {
|
|
if !bytes.HasPrefix(data, []byte("<<")) {
|
|
return nil, 0
|
|
}
|
|
start := 2
|
|
end := bytes.Index(data[start:], []byte(">>"))
|
|
if end < 0 {
|
|
return nil, 0
|
|
}
|
|
|
|
b := data[start : start+end]
|
|
b = bytes.TrimSpace(b)
|
|
i, err := strconv.Atoi(string(b))
|
|
if err != nil {
|
|
return nil, 0
|
|
}
|
|
if i <= 0 {
|
|
return nil, 0
|
|
}
|
|
return b, start + end + 2 // 2 for >>
|
|
}
|