From: Hong, Yang A <yang.a.hong@intel.com>
Date: Thu, 4 Mar 2021 16:13:46 +0000 (+0000)
Subject: literal API: add empty string check.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c81a6d14b0c370a2719ba13931114c2c2b2e929b;p=thirdparty%2Fvectorscan.git

literal API: add empty string check.

fixes github issue #302, #304
---

diff --git a/src/compiler/compiler.cpp b/src/compiler/compiler.cpp
index 32836834..35f46b3f 100644
--- a/src/compiler/compiler.cpp
+++ b/src/compiler/compiler.cpp
@@ -417,6 +417,10 @@ void addLitExpression(NG &ng, unsigned index, const char *expression,
                            "HS_FLAG_SOM_LEFTMOST are supported in literal API.");
     }
 
+    if (!strcmp(expression, "")) {
+        throw CompileError("Pure literal API doesn't support empty string.");
+    }
+
     // This expression must be a pure literal, we can build ue2_literal
     // directly based on expression text.
     ParsedLitExpression ple(index, expression, expLength, flags, id);