From 11e1a073f33be9fdc1ff9194306179e3e60eb770 Mon Sep 17 00:00:00 2001
From: John Kessenich <cepheus@frii.com>
Date: Sat, 30 Jul 2016 13:39:52 -0600
Subject: [PATCH] PP: Fix issue #407; handle empty identifier.

The sequence

  #define m()
  int m"

creates a token of no length (a string of 0 size).  Protect
against a string of 0 size as well as the existing protect
against a null string.
---
 Test/baseResults/cppBad.vert.out    | 6 ++++--
 Test/cppBad.vert                    | 3 +++
 glslang/Include/revision.h          | 2 +-
 glslang/MachineIndependent/Scan.cpp | 4 +++-
 4 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/Test/baseResults/cppBad.vert.out b/Test/baseResults/cppBad.vert.out
index bd7c141..6938af6 100755
--- a/Test/baseResults/cppBad.vert.out
+++ b/Test/baseResults/cppBad.vert.out
@@ -1,8 +1,10 @@
 cppBad.vert
 ERROR: 0:2: 'preprocessor evaluation' : bad expression 
 ERROR: 0:2: '#if' : unexpected tokens following directive 
-ERROR: 0:3: '' : missing #endif 
-ERROR: 3 compilation errors.  No code generated.
+ERROR: 0:5: 'string' : End of line in string 
+ERROR: 0:5: 'macro expansion' : expected '(' following n
+ERROR: 0:5: '' :  syntax error
+ERROR: 5 compilation errors.  No code generated.
 
 
 Shader version: 100
diff --git a/Test/cppBad.vert b/Test/cppBad.vert
index bb1626e..49600f9 100644
--- a/Test/cppBad.vert
+++ b/Test/cppBad.vert
@@ -1,2 +1,5 @@
 #define m#0#
 #if m
+
+#define n()
+int n"
\ No newline at end of file
diff --git a/glslang/Include/revision.h b/glslang/Include/revision.h
index 88fc553..2badfd2 100644
--- a/glslang/Include/revision.h
+++ b/glslang/Include/revision.h
@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "SPIRV99.1373"
+#define GLSLANG_REVISION "SPIRV99.1374"
 #define GLSLANG_DATE "30-Jul-2016"
diff --git a/glslang/MachineIndependent/Scan.cpp b/glslang/MachineIndependent/Scan.cpp
index 7f60ddc..e297e34 100644
--- a/glslang/MachineIndependent/Scan.cpp
+++ b/glslang/MachineIndependent/Scan.cpp
@@ -612,13 +612,15 @@ void TScanContext::deleteKeywordMap()
     ReservedSet = nullptr;
 }
 
+// Called by yylex to get the next token.
+// Returning 0 implies end of input.
 int TScanContext::tokenize(TPpContext* pp, TParserToken& token)
 {
     do {
         parserToken = &token;
         TPpToken ppToken;
         tokenText = pp->tokenize(&ppToken);
-        if (tokenText == nullptr)
+        if (tokenText == nullptr || tokenText[0] == 0)
             return 0;
 
         loc = ppToken.loc;
-- 
2.7.4