From 7577bdb1dfcdf449b27aac4f7d32a74819ca1d2f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Marjam=C3=A4ki?= <daniel.marjamaki@gmail.com>
Date: Tue, 31 Mar 2020 11:33:22 +0200
Subject: [PATCH] DACA: Try to avoid some crashes/hangs for the most crazy code
 so we can focus on most serious bugs first

---
 cli/cmdlineparser.cpp |  1 +
 lib/settings.cpp      |  1 +
 lib/settings.h        |  3 +++
 lib/tokenize.cpp      | 14 ++++++++++++++
 4 files changed, 19 insertions(+)

diff --git a/cli/cmdlineparser.cpp b/cli/cmdlineparser.cpp
index 785a4f991..f517107f0 100644
--- a/cli/cmdlineparser.cpp
+++ b/cli/cmdlineparser.cpp
@@ -664,6 +664,7 @@ bool CmdLineParser::parseFromArgs(int argc, const char* const argv[])
                     mSettings->templateFormat = "{file}:{line}:{column}: warning: {message} [{id}]\\n{code}";
                     mSettings->templateLocation = "{file}:{line}:{column}: note: {info}\\n{code}";
                 } else if (mSettings->templateFormat == "daca2") {
+                    mSettings->daca = true;
                     mSettings->templateFormat = "{file}:{line}:{column}: {severity}: {message} [{id}]";
                     mSettings->templateLocation = "{file}:{line}:{column}: note: {info}";
                 } else if (mSettings->templateFormat == "vs")
diff --git a/lib/settings.cpp b/lib/settings.cpp
index 589e18437..b48158771 100644
--- a/lib/settings.cpp
+++ b/lib/settings.cpp
@@ -36,6 +36,7 @@ Settings::Settings()
       checkUnusedTemplates(false),
       clang(false),
       clangTidy(false),
+      daca(false),
       debugSimplified(false),
       debugnormal(false),
       debugwarnings(false),
diff --git a/lib/settings.h b/lib/settings.h
index 0e5aaad0f..8cc9eafa4 100644
--- a/lib/settings.h
+++ b/lib/settings.h
@@ -105,6 +105,9 @@ public:
     /** @brief include paths excluded from checking the configuration */
     std::set<std::string> configExcludePaths;
 
+    /** @brief Are we running from DACA script? */
+    bool daca;
+
     /** @brief Is --debug-simplified given? */
     bool debugSimplified;
 
diff --git a/lib/tokenize.cpp b/lib/tokenize.cpp
index c82a6c7fd..d9ee852e2 100644
--- a/lib/tokenize.cpp
+++ b/lib/tokenize.cpp
@@ -4297,6 +4297,20 @@ bool Tokenizer::simplifyTokenList1(const char FileName[])
         }
     }
 
+    // Some special bailouts in DACA. To avoid too much hangs/crashes.
+    // FIXME: This is hopefully temporary. Somehow it should not be used in releases.
+    if (mSettings->daca) {
+        int numcase = 0;
+        for (const Token *tok = list.front(); tok; tok = tok->next()) {
+            if (Token::Match(tok, "%name% [ %num% ] = {") && MathLib::toLongNumber(tok->strAt(2)) > 10000)
+                return false;
+            if (tok->str() == "case") {
+                if (++numcase > 10000)
+                    return false;
+            }
+        }
+    }
+
     // Is there C++ code in C file?
     validateC();