refactor: remove tr_str_is_empty() (#6432)

* refactor: do not u se tr_str_is_empty() in tr_torrentSetLocation()

* refactor: do not use tr_str_is_empty() in remote.cc

* refactor: do not use tr_str_is_empty() in subprocess-win32

* refactor: remove tr_str_is_empty()

libtransmission/subprocess-win32.cc

@@ -144,12 +144,14 @@ auto get_current_env()
 
 void append_argument(std::string& arguments, char const* argument)
 {
+    TR_ASSERT(argument != nullptr);
+
     if (!std::empty(arguments))
     {
         arguments += ' ';
     }
 
-    if (!tr_str_is_empty(argument) && strpbrk(argument, " \t\n\v\"") == nullptr)
+    if (*argument != '\0' && strpbrk(argument, " \t\n\v\"") == nullptr)
     {
         arguments += argument;
         return;

libtransmission/torrent.cc

@@ -1182,7 +1182,8 @@ void tr_torrent::set_location(std::string_view location, bool move_from_old_path
 void tr_torrentSetLocation(tr_torrent* tor, char const* location, bool move_from_old_path, int volatile* setme_state)
 {
     TR_ASSERT(tr_isTorrent(tor));
-    TR_ASSERT(!tr_str_is_empty(location));
+    TR_ASSERT(location != nullptr);
+    TR_ASSERT(*location != '\0');
 
     tor->set_location(location, move_from_old_path, setme_state);
 }

libtransmission/utils.h

@@ -100,11 +100,6 @@ int tr_main_win32(int argc, char** argv, int (*real_main)(int, char**));
 
 // ---
 
-[[nodiscard]] constexpr bool tr_str_is_empty(char const* value)
-{
-    return value == nullptr || *value == '\0';
-}
-
 /** @brief Portability wrapper for `strlcpy()` that uses the system implementation if available */
 size_t tr_strlcpy(void* dst, void const* src, size_t siz);
 

utils/remote.cc

@@ -679,23 +679,28 @@ static void setGroup(tr_variant* args, std::string_view group)
     tr_variantDictAddStrView(args, TR_KEY_group, group);
 }
 
-static void addFiles(tr_variant* args, tr_quark const key, char const* arg)
+[[nodiscard]] auto make_files_list(char const* const str_in)
 {
-    tr_variant* files = tr_variantDictAddList(args, key, 100);
+    auto str = std::string_view{ str_in != nullptr ? str_in : "" };
 
-    if (tr_str_is_empty(arg))
+    if (std::empty(str))
     {
         fmt::print(stderr, "No files specified!\n");
-        arg = "-1"; /* no file will have this index, so should be a no-op */
+        str = "-1"sv; // no file will have this index, so should be a no-op
     }
 
-    if (strcmp(arg, "all") != 0)
+    auto files = tr_variant::Vector{};
+
+    if (str != "all"sv)
     {
-        for (auto const& idx : tr_num_parse_range(arg))
+        files.reserve(100U);
+        for (auto const& idx : tr_num_parse_range(str))
         {
-            tr_variantListAddInt(files, idx);
+            files.emplace_back(idx);
         }
     }
+
+    return files;
 }
 
 // clang-format off
@@ -2935,11 +2940,11 @@ static int processArgs(char const* rpcurl, int argc, char const* const* argv, Re
             switch (c)
             {
             case 'g':
-                addFiles(args, TR_KEY_files_wanted, optarg);
+                *tr_variantDictAdd(args, TR_KEY_files_wanted) = make_files_list(optarg);
                 break;
 
             case 'G':
-                addFiles(args, TR_KEY_files_unwanted, optarg);
+                *tr_variantDictAdd(args, TR_KEY_files_unwanted) = make_files_list(optarg);
                 break;
 
             case 'L':
@@ -2955,15 +2960,15 @@ static int processArgs(char const* rpcurl, int argc, char const* const* argv, Re
                 break;
 
             case 900:
-                addFiles(args, TR_KEY_priority_high, optarg);
+                *tr_variantDictAdd(args, TR_KEY_priority_high) = make_files_list(optarg);
                 break;
 
             case 901:
-                addFiles(args, TR_KEY_priority_normal, optarg);
+                *tr_variantDictAdd(args, TR_KEY_priority_normal) = make_files_list(optarg);
                 break;
 
             case 902:
-                addFiles(args, TR_KEY_priority_low, optarg);
+                *tr_variantDictAdd(args, TR_KEY_priority_low) = make_files_list(optarg);
                 break;
 
             case 700: