Allow llvm-upgrade to read from stdin. Configure the lexer for reading

from C++ std::istream.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32041 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 8 deletions

diff --git a/tools/llvm-upgrade/UpgradeLexer.l.cvs b/tools/llvm-upgrade/UpgradeLexer.l.cvs
index 08dfd8f335..6822907606 100644
--- a/tools/llvm-upgrade/UpgradeLexer.l.cvs
+++ b/tools/llvm-upgrade/UpgradeLexer.l.cvs
@@ -1,13 +1,13 @@
-/*===-- Lexer.l - Scanner for llvm assembly files --------------*- C++ -*--===//
+/*===-- UpgradeLexer.l - Scanner for 1.9 assembly files --------*- C++ -*--===//
 //
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file was developed by Reid Spencer and is distributed under the 
+// University of Illinois Open Source License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
-//  This file implements the flex scanner for LLVM assembly languages files.
+//  This file implements the flex scanner for LLVM 1.9 assembly languages files.
 //
 //===----------------------------------------------------------------------===*/
 
@@ -32,16 +32,23 @@
 #include <cctype>
 #include <cstdlib>
 
-void set_scan_bytes (const char * str, size_t len) {
-  Upgrade_scan_bytes (str, len);
-}
-
 static void trim(std::string& str) {
   size_t startpos = str.find_first_not_of(" \t\n\r",0);
   if (startpos != std::string::npos)
     str.erase(0,startpos);
 }
 
+#define YY_INPUT(buf,result,max_size) \
+{ \
+  if (LexInput->good() && !LexInput->eof()) { \
+    LexInput->read(buf,max_size); \
+    result = LexInput->gcount(); \
+  } else {\
+    result = YY_NULL; \
+  } \
+}
+
+
 // Construct a token value for a non-obsolete token
 #define RET_TOK(sym) \
   Upgradelval = new std::string(yytext); \