Configure clang-tidy target

Also fix nits.

.clang-tidy

@@ -1,6 +1,7 @@
 Checks: '
     -*,
     bugprone-*,
+    -bugprone-macro-parentheses,
     google-*,
     -google-build-using-namespace,
     -google-readability-casting,
@@ -12,6 +13,7 @@ Checks: '
     -misc-redundant-expression,
     -misc-unused-parameters,
     modernize-*,
+    -modernize-avoid-c-arrays,
     -modernize-deprecated-headers,
     -modernize-loop-convert,
     -modernize-use-auto,
@@ -22,5 +24,7 @@ Checks: '
     readability-*,
     -readability-else-after-return,
     -readability-implicit-bool-conversion,
+    -readability-isolate-declaration,
+    -readability-magic-numbers,
     -readability-named-parameter,
     -readability-simplify-boolean-expr'

src/Makefile.am

@@ -24,7 +24,15 @@ if USE_GNUTLS_NETTLE
   AM_CPPFLAGS += -DUSE_GNUTLS_NETTLE
 endif
 
-s3fs_SOURCES = s3fs.cpp s3fs.h curl.cpp curl.h cache.cpp cache.h string_util.cpp string_util.h s3fs_util.cpp s3fs_util.h fdcache.cpp fdcache.h common_auth.cpp s3fs_auth.h addhead.cpp addhead.h common.h
+s3fs_SOURCES = \
+  s3fs.cpp \
+  curl.cpp \
+  cache.cpp \
+  string_util.cpp \
+  s3fs_util.cpp \
+  fdcache.cpp \
+  common_auth.cpp \
+  addhead.cpp
 if USE_SSL_OPENSSL
   s3fs_SOURCES += openssl_auth.cpp
 endif
@@ -39,6 +47,9 @@ s3fs_LDADD = $(DEPS_LIBS)
 
 noinst_PROGRAMS = test_string_util
 
-test_string_util_SOURCES = string_util.cpp test_string_util.cpp test_util.h
+test_string_util_SOURCES = string_util.cpp test_string_util.cpp
 
 TESTS = test_string_util
+
+clang-tidy:
+	clang-tidy $(s3fs_SOURCES) -- $(DEPS_CFLAGS) $(CPPFLAGS)

src/curl.cpp

@@ -3853,7 +3853,7 @@ int S3fsCurl::MultipartHeadRequest(const char* tpath, off_t size, headers_t& met
     strrange.str("");
     strrange.clear(stringstream::goodbit);
 
-    if(0 != (result = CopyMultipartPostSetup(tpath, tpath, (list.size() + 1), upload_id, meta))){
+    if(0 != (result = CopyMultipartPostSetup(tpath, tpath, static_cast<int>(list.size() + 1), upload_id, meta))){
       return result;
     }
     list.push_back(partdata.etag);

src/s3fs.cpp

@@ -937,7 +937,7 @@ static int s3fs_readlink(const char* _path, char* buf, size_t size)
   if(use_wtf8){
     strTmp = s3fs_wtf8_decode(strTmp);
   }
-  strcpy(buf, strTmp.c_str());
+  strncpy(buf, strTmp.c_str(), size);
 
   FdManager::get()->Close(ent);
   S3FS_MALLOCTRIM(0);
@@ -973,7 +973,7 @@ static int do_create_bucket()
   headers_t meta;
 
   S3fsCurl s3fscurl(true);
-  long     res = s3fscurl.PutRequest("/", meta, tmpfd);
+  int      res = s3fscurl.PutRequest("/", meta, tmpfd);
   if(res < 0){
     long responseCode = s3fscurl.GetLastResponseCode();
     if((responseCode == 400 || responseCode == 403) && S3fsCurl::IsSignatureV4()){
@@ -4555,7 +4555,7 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
       return 0;
     }
     if(0 == STR2NCMP(arg, "multireq_max=")){
-      long maxreq = static_cast<long>(s3fs_strtoofft(strchr(arg, '=') + sizeof(char)));
+      int maxreq = static_cast<int>(s3fs_strtoofft(strchr(arg, '=') + sizeof(char)));
       S3fsCurl::SetMaxMultiRequest(maxreq);
       return 0;
     }

src/string_util.cpp

@@ -96,7 +96,7 @@ off_t s3fs_strtoofft(const char* str, bool is_base_16)
 string lower(string s)
 {
   // change each character of the string to lower case
-  for(unsigned int i = 0; i < s.length(); i++){
+  for(size_t i = 0; i < s.length(); i++){
     s[i] = tolower(s[i]);
   }
   return s;
@@ -132,7 +132,7 @@ string trim(const string &s, const string &t /* = SPACES */)
 string urlEncode(const string &s)
 {
   string result;
-  for (unsigned i = 0; i < s.length(); ++i) {
+  for (size_t i = 0; i < s.length(); ++i) {
     char c = s[i];
     if (c == '/' // Note- special case for fuse paths...
       || c == '.'
@@ -160,7 +160,7 @@ string urlEncode(const string &s)
 string urlEncode2(const string &s)
 {
   string result;
-  for (unsigned i = 0; i < s.length(); ++i) {
+  for (size_t i = 0; i < s.length(); ++i) {
     char c = s[i];
     if (c == '=' // Note- special case for fuse paths...
       || c == '&' // Note- special case for s3...
@@ -185,11 +185,11 @@ string urlEncode2(const string &s)
 string urlDecode(const string& s)
 {
   string result;
-  for(unsigned i = 0; i < s.length(); ++i){
+  for(size_t i = 0; i < s.length(); ++i){
     if(s[i] != '%'){
       result += s[i];
     }else{
-      char ch = 0;
+      int ch = 0;
       if(s.length() <= ++i){
         break;       // wrong format.
       }
@@ -199,7 +199,7 @@ string urlDecode(const string& s)
       }
       ch *= 16;
       ch += ('0' <= s[i] && s[i] <= '9') ? (s[i] - '0') : ('A' <= s[i] && s[i] <= 'F') ? (s[i] - 'A' + 0x0a) : ('a' <= s[i] && s[i] <= 'f') ? (s[i] - 'a' + 0x0a) : 0x00;
-      result += ch;
+      result += static_cast<char>(ch);
     }
   }
   return result;
@@ -525,9 +525,9 @@ bool s3fs_wtf8_encode(const char *s, string *result)
     invalid = true;
     if (result) {
       unsigned escape = escape_base + c;
-      *result += 0xe0 | ((escape >> 12) & 0x0f);
-      *result += 0x80 | ((escape >> 06) & 0x3f);
-      *result += 0x80 | ((escape >> 00) & 0x3f);
+      *result += static_cast<char>(0xe0 | ((escape >> 12) & 0x0f));
+      *result += static_cast<char>(0x80 | ((escape >> 06) & 0x3f));
+      *result += static_cast<char>(0x80 | ((escape >> 00) & 0x3f));
     }
   }
   return invalid;
@@ -556,7 +556,7 @@ bool s3fs_wtf8_decode(const char *s, string *result)
         // convert back
         encoded = true;
         if(result){
-          *result += code - escape_base;
+          *result += static_cast<char>(code - escape_base);
         }
         s+=2;
         continue;