strconv: use builtin min function in commonPrefixLenIgnoreCase

To make code a bit simpler.

Change-Id: I33b3e04bc810a4838584c477854ef612b355579a
GitHub-Last-Rev: 6d5bbc2a2877193e1319b9e626f408eda399666e
GitHub-Pull-Request: golang/go#71927
Reviewed-on: https://go-review.googlesource.com/c/go/+/651975
Reviewed-by: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Robert Griesemer <gri@google.com>
Auto-Submit: Robert Griesemer <gri@google.com>

diff --git a/src/strconv/atof.go b/src/strconv/atof.go
index 8fc90425f69801d2005551c61a9aa3b7689d0708..fe0dfdce55a0d089c0dae31f383a033829832dc4 100644 (file)
--- a/src/strconv/atof.go
+++ b/src/strconv/atof.go
@@ -18,10 +18,7 @@ var optimize = true // set to false to force slow-path conversions for testing
 // prefix of s and prefix, with the character case of s ignored.
 // The prefix argument must be all lower-case.
 func commonPrefixLenIgnoreCase(s, prefix string) int {
-       n := len(prefix)
-       if n > len(s) {
-               n = len(s)
-       }
+       n := min(len(prefix), len(s))
        for i := 0; i < n; i++ {
                c := s[i]
                if 'A' <= c && c <= 'Z' {