Implements StringRef::compare with bounds. It is behaves similarly to strncmp(). Unit tests also included.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129582 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 6 insertions, 0 deletions

diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h
index 1766d2b9f2..adff42fe2d 100644
--- a/include/llvm/ADT/StringRef.h
+++ b/include/llvm/ADT/StringRef.h
@@ -125,6 +125,12 @@ namespace llvm {
       return Length < RHS.Length ? -1 : 1;
     }
 
+    /// compare - Compare two strings; the result is -1, 0, or 1 if this string
+    /// is lexicographically less than, equal to, or greater than the \arg RHS.
+    /// This is different than compare with no size specified as it only 
+    /// compares at most the first n bytes.
+    int compare(StringRef RHS, size_t n) const;
+
     /// compare_lower - Compare two strings, ignoring case.
     int compare_lower(StringRef RHS) const;