Check for hexadecimal literals exceeding MaxTokenLength.

Test/baseResults/overlongLiteral.frag.out

+overlongLiteral.frag
+ERROR: 0:1: '' : hexadecimal literal too long 
+ERROR: 0:1: '' :  syntax error, unexpected INTCONSTANT
+ERROR: 2 compilation errors.  No code generated.
+
+
+Shader version: 100
+ERROR: node is still EOpNull!
+0:?   Linker Objects
+
+
+Linked fragment stage:
+
+ERROR: Linking fragment stage: Missing entry point: Each stage requires one entry point
+
+Shader version: 100
+ERROR: node is still EOpNull!
+0:?   Linker Objects
+

Test/overlongLiteral.frag

+0x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000;

glslang/MachineIndependent/preprocessor/PpScanner.cpp

@@ -420,7 +420,7 @@ int TPpContext::tStringInput::scan(TPpToken* ppToken)
 
                     ival = 0;
                     do {
-                        if (ival <= 0x0fffffffu || (enableInt64 && ival <= 0x0fffffffffffffffull)) {
+                        if (len < MaxTokenLength && (ival <= 0x0fffffffu || (enableInt64 && ival <= 0x0fffffffffffffffull))) {
                             ppToken->name[len++] = (char)ch;
                             if (ch >= '0' && ch <= '9') {
                                 ii = ch - '0';
@@ -433,7 +433,10 @@ int TPpContext::tStringInput::scan(TPpToken* ppToken)
                             ival = (ival << 4) | ii;
                         } else {
                             if (! AlreadyComplained) {
-                                pp->parseContext.ppError(ppToken->loc, "hexadecimal literal too big", "", "");
+                                if(len < MaxTokenLength)
+                                    pp->parseContext.ppError(ppToken->loc, "hexadecimal literal too big", "", "");
+                                else
+                                    pp->parseContext.ppError(ppToken->loc, "hexadecimal literal too long", "", "");
                                 AlreadyComplained = 1;
                             }
                             ival = 0xffffffffffffffffull;

gtests/AST.FromFile.cpp

@@ -183,6 +183,7 @@ INSTANTIATE_TEST_CASE_P(
         "matrix2.frag",
         "newTexture.frag",
         "Operations.frag",
+        "overlongLiteral.frag",
         "prepost.frag",
         "simpleFunctionCall.frag",
         "structAssignment.frag",