Teach loplugin:toolslong about curl_easy_getinfo

...see a9266c39cc71c6f23bfcad4ff6d33ccac53b5e52 "loplugin:toolslong
(--enable-online-update)" arguing that "the third argument to

  curl_easy_getinfo(..., CURLINFO_RESPONSE_CODE, ...)

must be a pointer to long".

Change-Id: I7c542595219d2387cf869953fe40faef2b41b44f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104857
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/compilerplugins/clang/toolslong.cxx b/compilerplugins/clang/toolslong.cxx
index 1f55fb76d1d6..094087911e6a 100644
--- a/compilerplugins/clang/toolslong.cxx
+++ b/compilerplugins/clang/toolslong.cxx
@@ -89,6 +89,8 @@ public:
     bool WalkUpFromFunctionDecl(FunctionDecl const* decl);
     bool VisitFunctionDecl(FunctionDecl const* decl);
 
+    bool VisitCallExpr(CallExpr const* expr);
+
 private:
     bool rewrite(SourceLocation location);
     bool isExcludedFile(SourceLocation spellingLocation) const;
@@ -511,6 +513,48 @@ bool ToolsLong::VisitFunctionDecl(FunctionDecl const* decl)
     return true;
 }
 
+bool ToolsLong::VisitCallExpr(CallExpr const* expr)
+{
+    if (ignoreLocation(expr))
+    {
+        return true;
+    }
+    auto const d1 = expr->getDirectCallee();
+    if (d1 == nullptr || !loplugin::DeclCheck(d1).Function("curl_easy_getinfo").GlobalNamespace())
+    {
+        return true;
+    }
+    if (expr->getNumArgs() != 3)
+    {
+        return true;
+    }
+    //TODO: Check expr->getArg(1) is CURLINFO_RESPONSE_CODE
+    auto const e1 = dyn_cast<UnaryOperator>(expr->getArg(2)->IgnoreParenImpCasts());
+    if (e1 == nullptr || e1->getOpcode() != UO_AddrOf)
+    {
+        return true;
+    }
+    auto const e2 = dyn_cast<DeclRefExpr>(e1->getSubExpr()->IgnoreParenImpCasts());
+    if (e2 == nullptr)
+    {
+        return true;
+    }
+    auto const d2 = e2->getDecl();
+    if (auto const d3 = dyn_cast<ParmVarDecl>(d2))
+    {
+        parmVarDecls_.erase(d3);
+    }
+    else if (auto const d4 = dyn_cast<VarDecl>(d2))
+    {
+        varDecls_.erase(d4);
+    }
+    else if (auto const d5 = dyn_cast<FieldDecl>(d2))
+    {
+        fieldDecls_.erase(d5);
+    }
+    return true;
+}
+
 bool ToolsLong::rewrite(SourceLocation location)
 {
     if (rewriter != nullptr)