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Diffstat (limited to 'src/pkg/bytes/bytes.go')
| -rw-r--r-- | src/pkg/bytes/bytes.go | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/pkg/bytes/bytes.go b/src/pkg/bytes/bytes.go index e3ee5b1d88..31cf89ea87 100644 --- a/src/pkg/bytes/bytes.go +++ b/src/pkg/bytes/bytes.go @@ -515,6 +515,24 @@ func TrimFunc(s []byte, f func(r rune) bool) []byte { return TrimRightFunc(TrimLeftFunc(s, f), f) } +// TrimPrefix returns s without the provided leading prefix string. +// If s doesn't start with prefix, s is returned unchanged. +func TrimPrefix(s, prefix []byte) []byte { + if HasPrefix(s, prefix) { + return s[len(prefix):] + } + return s +} + +// TrimSuffix returns s without the provided trailing suffix string. +// If s doesn't end with suffix, s is returned unchanged. +func TrimSuffix(s, suffix []byte) []byte { + if HasSuffix(s, suffix) { + return s[:len(s)-len(suffix)] + } + return s +} + // IndexFunc interprets s as a sequence of UTF-8-encoded Unicode code points. // It returns the byte index in s of the first Unicode // code point satisfying f(c), or -1 if none do. |