@ -29,8 +29,8 @@ type RangeScanner struct {
err error // error from last scan, if any
}
// Create a new RangeScanner for the given buffer, producing ranges for the
// given filename.
// NewRangeScanner creates a new RangeScanner for the given buffer, producing
// ranges for the given filename.
//
// Since ranges have grapheme-cluster granularity rather than byte granularity,
// the scanner will produce incorrect results if the given SplitFunc creates
@ -39,15 +39,19 @@ type RangeScanner struct {
// around individual UTF-8 sequences, which will split any multi-sequence
// grapheme clusters.
func NewRangeScanner ( b [ ] byte , filename string , cb bufio . SplitFunc ) * RangeScanner {
return NewRangeScannerFragment ( b , filename , InitialPos , cb )
}
// NewRangeScannerFragment is like NewRangeScanner but the ranges it produces
// will be offset by the given starting position, which is appropriate for
// sub-slices of a file, whereas NewRangeScanner assumes it is scanning an
// entire file.
func NewRangeScannerFragment ( b [ ] byte , filename string , start Pos , cb bufio . SplitFunc ) * RangeScanner {
return & RangeScanner {
filename : filename ,
b : b ,
cb : cb ,
pos : Pos {
Byte : 0 ,
Line : 1 ,
Column : 1 ,
} ,
pos : start ,
}
}
Martin Atkins
7 years ago