From 0d4b4394bbeaf7150eaad35c502bbb4bcac66a60 Mon Sep 17 00:00:00 2001
From: chrchr-github <78114321+chrchr-github@users.noreply.github.com>
Date: Tue, 21 Jun 2022 13:33:45 +0200
Subject: [PATCH] Fix FP with embedded zeros (#4226)

* Partial fix for #11137 FN: invalidFunctionArgStr printf argument

* Typo

* Remove <strz>, suppressions

* Add suppresion, remove <strz>

* Add suppressions

* Fix FP with embedded zeros

* Merge
---
 lib/checkfunctions.cpp | 2 +-
 test/testfunctions.cpp | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/checkfunctions.cpp b/lib/checkfunctions.cpp
index 1c0ba58f6..8fdf20d29 100644
--- a/lib/checkfunctions.cpp
+++ b/lib/checkfunctions.cpp
@@ -174,7 +174,7 @@ void CheckFunctions::invalidFunctionUsage()
                             const Token* strTok = varTok->getValueTokenMinStrSize(mSettings);
                             if (strTok) {
                                 const int strSize = Token::getStrArraySize(strTok);
-                                if (strSize > count)
+                                if (strSize > count && strTok->str().find('\0') == std::string::npos)
                                     invalidFunctionArgStrError(argtok, functionToken->str(), argnr);
                             }
                         }
diff --git a/test/testfunctions.cpp b/test/testfunctions.cpp
index 550d869bd..eef345b5d 100644
--- a/test/testfunctions.cpp
+++ b/test/testfunctions.cpp
@@ -729,6 +729,12 @@ private:
               "    strcat(dest, if_name);\n"
               "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        check("int f() {\n"
+              "    const char c[3] = \"ab\\0\";\n"
+              "    return strlen(c);\n"
+              "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void mathfunctionCall_sqrt() {