[cfe-commits] r131132 - /cfe/trunk/lib/Lex/Lexer.cpp

[Eli Friedman]

Author: efriedma
Date: Tue May 10 12:11:21 2011
New Revision: 131132

URL: http://llvm.org/viewvc/llvm-project?rev=131132&view=rev
Log:
Don't strlen() every file before parsing it.


Modified:
    cfe/trunk/lib/Lex/Lexer.cpp

Modified: cfe/trunk/lib/Lex/Lexer.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Lex/Lexer.cpp?rev=131132&r1=131131&r2=131132&view=diff
==============================================================================
--- cfe/trunk/lib/Lex/Lexer.cpp (original)
+++ cfe/trunk/lib/Lex/Lexer.cpp Tue May 10 12:11:21 2011
@@ -76,7 +76,8 @@
   // skip the UTF-8 BOM if it's present.
   if (BufferStart == BufferPtr) {
     // Determine the size of the BOM.
-    size_t BOMLength = llvm::StringSwitch<size_t>(BufferStart)
+    llvm::StringRef Buf(BufferStart, BufferEnd - BufferStart);
+    size_t BOMLength = llvm::StringSwitch<size_t>(Buf)
       .StartsWith("\xEF\xBB\xBF", 3) // UTF-8 BOM
       .Default(0);