From 63b0d2edb0a245b325bfab8bdc06416ddc20cf70 Mon Sep 17 00:00:00 2001 From: Eli Friedman Date: Mon, 21 Dec 2009 06:49:24 +0000 Subject: Change StringRef::startswith and StringRef::endswith to versions which are a bit more verbose, but optimize to much shorter code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@91817 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/ADT/StringRef.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include/llvm/ADT/StringRef.h') diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h index f299f5f..a744266 100644 --- a/include/llvm/ADT/StringRef.h +++ b/include/llvm/ADT/StringRef.h @@ -159,12 +159,14 @@ namespace llvm { /// startswith - Check if this string starts with the given \arg Prefix. bool startswith(StringRef Prefix) const { - return substr(0, Prefix.Length).equals(Prefix); + return Length >= Prefix.Length && + memcmp(Data, Prefix.Data, Prefix.Length) == 0; } /// endswith - Check if this string ends with the given \arg Suffix. bool endswith(StringRef Suffix) const { - return slice(size() - Suffix.Length, size()).equals(Suffix); + return Length >= Suffix.Length && + memcmp(end() - Suffix.Length, Suffix.Data, Suffix.Length) == 0; } /// @} -- cgit v1.1