fix: align code to fix cppcheck errors

examples/multiprocess_c/multi.c

@@ -38,7 +38,7 @@ RulesSet *rules = NULL;
 ModSecurity *modsec = NULL;
 
 
-void process_special_request (int j) {
+static void process_special_request (int j) {
     Transaction *transaction;
     transaction = msc_new_transaction(modsec, rules, NULL);
 
@@ -60,7 +60,7 @@ void process_special_request (int j) {
     msc_transaction_cleanup(transaction);
 }
 
-void process_request (int j) {
+static void process_request (int j) {
     int i;
 
     for (i = 0; i < REQUESTS_PER_PROCESS; i++) {

headers/modsecurity/rules_exceptions.h

@@ -53,8 +53,8 @@ class RulesExceptions {
     bool contains(int a);
     bool merge(RulesExceptions *from);
 
-    bool loadRemoveRuleByMsg(const std::string &msg, std::string *error);
-    bool loadRemoveRuleByTag(const std::string &msg, std::string *error);
+    bool loadRemoveRuleByMsg(const std::string &msg, const std::string *error);
+    bool loadRemoveRuleByTag(const std::string &msg, const std::string *error);
 
     bool loadUpdateTargetByMsg(const std::string &msg,
         std::unique_ptr<std::vector<std::unique_ptr<variables::Variable> > > v,

src/actions/transformations/utf8_to_unicode.cc

@@ -46,7 +46,7 @@ static inline bool encode(std::string &value) {
         int unicode_len = 0;
         unsigned int d = 0;
         unsigned char c;
-        auto utf = &input[i];
+        const auto* utf = &input[i];
 
         c = *utf;
 

src/operators/fuzzy_hash.cc

@@ -28,7 +28,7 @@ bool FuzzyHash::init(const std::string &param2, std::string *error) {
     std::string digit;
     std::string file;
     std::istream *iss;
-    struct fuzzy_hash_chunk *chunk, *t;
+    std::shared_ptr<fuzzy_hash_chunk> chunk, t;
     std::string err;
 
     auto pos = m_param.find_last_of(' ');
@@ -55,11 +55,10 @@ bool FuzzyHash::init(const std::string &param2, std::string *error) {
     }
 
     for (std::string line; std::getline(*iss, line); ) {
-       chunk = (struct fuzzy_hash_chunk *)calloc(1,
-            sizeof(struct fuzzy_hash_chunk));
+        chunk = std::make_shared<fuzzy_hash_chunk>();
 
-        chunk->data = strdup(line.c_str());
-        chunk->next = NULL;
+        chunk->data = std::shared_ptr<char>(strdup(line.c_str()), free);
+        chunk->next = nullptr;
 
         if (m_head == NULL) {
             m_head = chunk;
@@ -83,23 +82,11 @@ bool FuzzyHash::init(const std::string &param2, std::string *error) {
 #endif
 }
 
-FuzzyHash::~FuzzyHash() {
-    struct fuzzy_hash_chunk *c = m_head;
-    while (c) {
-        struct fuzzy_hash_chunk *t = c;
-        free(c->data);
-        c->data = NULL;
-        c = c->next;
-        free(t);
-    }
-    m_head = NULL;
-}
-
-
 bool FuzzyHash::evaluate(Transaction *t, const std::string &str) {
 #ifdef WITH_SSDEEP
     char result[FUZZY_MAX_RESULT];
-    struct fuzzy_hash_chunk *chunk = m_head;
+    std::shared_ptr<fuzzy_hash_chunk> chunk = m_head;
+
 
     if (fuzzy_hash_buf((const unsigned char*)str.c_str(),
         str.size(), result)) {
@@ -108,7 +95,7 @@ bool FuzzyHash::evaluate(Transaction *t, const std::string &str) {
     }
 
     while (chunk != NULL) {
-        int i = fuzzy_compare(chunk->data, result);
+        int i = fuzzy_compare(chunk->data.get(), result);
         if (i >= m_threshold) {
             ms_dbg_a(t, 4, "Fuzzy hash: matched " \
                 "with score: " + std::to_string(i) + ".");

src/operators/fuzzy_hash.h

@@ -31,8 +31,8 @@ namespace operators {
 
 
 struct fuzzy_hash_chunk {
-    char *data;
-    struct fuzzy_hash_chunk *next;
+    std::shared_ptr<char> data;
+    std::shared_ptr<fuzzy_hash_chunk> next;
 };
 
 class FuzzyHash : public Operator {
@@ -42,14 +42,14 @@ class FuzzyHash : public Operator {
         : Operator("FuzzyHash", std::move(param)),
         m_threshold(0),
         m_head(NULL) { }
-    ~FuzzyHash() override;
+    ~FuzzyHash() override = default;
 
     bool evaluate(Transaction *transaction, const std::string &std) override;
 
     bool init(const std::string &param, std::string *error) override;
  private:
     int m_threshold;
-    struct fuzzy_hash_chunk *m_head;
+    std::shared_ptr<fuzzy_hash_chunk> m_head;
 };
 
 }  // namespace operators

src/request_body_processor/multipart.cc

@@ -1638,7 +1638,7 @@ bool Multipart::process(const std::string& data, std::string *error,
                     }
                 } else { /* It looks like a boundary but */
                          /* we couldn't match it. */
-                    char *p = NULL;
+                    const char *p = NULL;
 
                     /* Check if an attempt to use quotes around the
                      * boundary was made. */

src/rules_exceptions.cc

@@ -58,15 +58,15 @@ bool RulesExceptions::loadUpdateActionById(double id,
 
 
 bool RulesExceptions::loadRemoveRuleByMsg(const std::string &msg,
-    std::string *error) {
+    const std::string *error) {
     m_remove_rule_by_msg.push_back(msg);
 
     return true;
 }
 
 
 bool RulesExceptions::loadRemoveRuleByTag(const std::string &msg,
-    std::string *error) {
+    const std::string *error) {
     m_remove_rule_by_tag.push_back(msg);
 
     return true;