diff options
Diffstat (limited to 'src/runtime/string.go')
| -rw-r--r-- | src/runtime/string.go | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/src/runtime/string.go b/src/runtime/string.go index e43f4cca51..7bb9d58de0 100644 --- a/src/runtime/string.go +++ b/src/runtime/string.go @@ -76,7 +76,7 @@ func concatstring5(buf *tmpBuf, a0, a1, a2, a3, a4 string) string { // concatbytes implements a Go string concatenation x+y+z+... returning a slice // of bytes. // The operands are passed in the slice a. -func concatbytes(a []string) []byte { +func concatbytes(buf *tmpBuf, a []string) []byte { l := 0 for _, x := range a { n := len(x) @@ -90,7 +90,13 @@ func concatbytes(a []string) []byte { return []byte{} } - b := rawbyteslice(l) + var b []byte + if buf != nil && l <= len(buf) { + *buf = tmpBuf{} + b = buf[:l] + } else { + b = rawbyteslice(l) + } offset := 0 for _, x := range a { copy(b[offset:], x) @@ -100,20 +106,20 @@ func concatbytes(a []string) []byte { return b } -func concatbyte2(a0, a1 string) []byte { - return concatbytes([]string{a0, a1}) +func concatbyte2(buf *tmpBuf, a0, a1 string) []byte { + return concatbytes(buf, []string{a0, a1}) } -func concatbyte3(a0, a1, a2 string) []byte { - return concatbytes([]string{a0, a1, a2}) +func concatbyte3(buf *tmpBuf, a0, a1, a2 string) []byte { + return concatbytes(buf, []string{a0, a1, a2}) } -func concatbyte4(a0, a1, a2, a3 string) []byte { - return concatbytes([]string{a0, a1, a2, a3}) +func concatbyte4(buf *tmpBuf, a0, a1, a2, a3 string) []byte { + return concatbytes(buf, []string{a0, a1, a2, a3}) } -func concatbyte5(a0, a1, a2, a3, a4 string) []byte { - return concatbytes([]string{a0, a1, a2, a3, a4}) +func concatbyte5(buf *tmpBuf, a0, a1, a2, a3, a4 string) []byte { + return concatbytes(buf, []string{a0, a1, a2, a3, a4}) } // slicebytetostring converts a byte slice to a string. |