Remove dlists in prefs.

I can remove the NOP free function, now.

src/actions.cc

@@ -47,10 +47,10 @@ action_parse(char *line)
 void
 a_Actions_init(void)
 {
-   int n = dList_length(prefs.link_actions);
+   int n = prefs.link_actions.size();
 
    for (int i = 0; i < n; i++) {
-      char *line = reinterpret_cast< char * >( dList_nth_data(prefs.link_actions, i) );
+      char *line = prefs.link_actions.at( i );
       if (line)
          action_parse(line);
    }

src/dialog.cc

@@ -188,12 +188,12 @@ const char *a_Dialog_input(const char *title, const char *msg)
 
     CustChoice2 *ch = new CustChoice2(1*gap,ih+3*gap,180,24);
     if (!pm) {
-       int n_it = dList_length(prefs.search_urls);
+		const int n_it = prefs.search_urls.size();
        pm = new Fl_Menu_Item[n_it+1];
        memset(pm, '\0', (n_it + 1) * sizeof(Fl_Menu_Item));
        for (int i = 0, j = 0; i < n_it; i++) {
           char *label, *url, *source;
-          source = (char *)dList_nth_data(prefs.search_urls, i);
+          source = prefs.search_urls.at( i ).data();
           if (!source || a_Misc_parse_search_url(source, &label, &url) < 0)
              continue;
           pm[j++].label(FL_NORMAL_LABEL, dStrdup(label));

src/prefs.cc

@@ -81,14 +81,12 @@ void a_Prefs_init(void)
    prefs.scroll_switches_tabs = TRUE;
    prefs.scroll_switches_tabs_reverse = FALSE;
    prefs.no_proxy = PREFS_NO_PROXY;
-   prefs.link_actions = dList_new(16);
    prefs.panel_size = P_medium;
    prefs.parse_embedded_css=TRUE;
    prefs.save_dir = PREFS_SAVE_DIR;
    prefs.scroll_step = 100;
    prefs.scroll_page_overlap = 50;
-   prefs.search_urls = dList_new(16);
-   dList_append(prefs.search_urls, dStrdup(PREFS_SEARCH_URL));
+   prefs.search_urls.push_back(PREFS_SEARCH_URL);
    prefs.search_url_idx = 0;
    prefs.scrollbar_on_left = FALSE;
    prefs.scrollbar_page_mode = FALSE;
@@ -140,9 +138,4 @@ void a_Prefs_init(void)
  */
 void a_Prefs_freeall()
 {
-   int i;
-
-   for (i = 0; i < dList_length(prefs.search_urls); ++i)
-      dFree(dList_nth_data(prefs.search_urls, i));
-   dList_free(prefs.search_urls);
 }

src/prefs.hh

@@ -15,6 +15,9 @@
 
 #include "url.hh"
 
+#include <string>
+#include <vector>
+
 #ifdef __cplusplus
 extern "C" {
 #else
@@ -119,7 +122,7 @@ struct DilloPrefs
    bool scroll_switches_tabs;
    bool scroll_switches_tabs_reverse;
    bool search_url_idx;
-   Dlist *search_urls;
+   std::vector< std::string > search_urls;
    std::optional< std::string > save_dir;
    bool show_msg;
    bool show_extra_warnings;
@@ -127,7 +130,7 @@ struct DilloPrefs
    int penalty_hyphen, penalty_hyphen_2;
    int penalty_em_dash_left, penalty_em_dash_right, penalty_em_dash_right_2;
    int stretchability_factor;
-   Dlist *link_actions;
+   std::vector< char * > link_actions;
 };
 
 /** Global Data */

src/uicmd.cc

@@ -741,9 +741,9 @@ static std::optional< std::string > UIcmd_find_search_str(const char *str)
       /* we found a ' ' in str, check whether the first part of str
        * is a prefix of a search_url label
        */
-      for (p = 0; p < dList_length(prefs.search_urls); p++) {
+      for (p = 0; p < prefs.search_urls.size(); p++) {
          const char *search =
-            (const char *)dList_nth_data(prefs.search_urls, p);
+            prefs.search_urls.at(p).c_str();
          if (search && dStrnAsciiCasecmp(str, search, len) == 0) {
             prefs.search_url_idx = p;
             url = UIcmd_make_search_str(str + len + 1);
@@ -1164,7 +1164,7 @@ UIcmd_make_search_str(const char *str)
 {
    char *l, *u, *c;
    std::string keys = a_Url_encode_hex_str(str).value_or( "" );
-   char *src = (char*)dList_nth_data(prefs.search_urls, prefs.search_url_idx);
+   char *src = prefs.search_urls.at( prefs.search_url_idx).data();
    std::string search_url;
 
    /* parse search_url into label and url */