add：添加上下功能键翻阅历史输入。

.vscode/settings.json

@@ -89,6 +89,25 @@
         "xloctime": "cpp",
         "xtree": "cpp",
         "deque": "cpp",
-        "array": "cpp"
+        "array": "cpp",
+        "functional": "cpp",
+        "map": "cpp",
+        "queue": "cpp",
+        "unordered_map": "cpp",
+        "xhash": "cpp",
+        "atomic": "cpp",
+        "bit": "cpp",
+        "charconv": "cpp",
+        "clocale": "cpp",
+        "compare": "cpp",
+        "concepts": "cpp",
+        "format": "cpp",
+        "forward_list": "cpp",
+        "iterator": "cpp",
+        "mutex": "cpp",
+        "optional": "cpp",
+        "sstream": "cpp",
+        "stop_token": "cpp",
+        "thread": "cpp"
     }
 }

filecomplete.cpp

@@ -1,9 +1,9 @@
 #include "filecomplete.h"
 #include <cstring>
 #include <map>
+#include <memory>
 #include <string>
 #include <vector>
-#include <memory>
 
 #ifdef USE_BOOST_FILESYSTEM
 #include <boost/filesystem.hpp>
@@ -101,6 +101,43 @@ static std::vector<std::string> cur_work_content;
 static std::vector<char> deadline_vch;
 static std::string str_predict;
 static std::map<std::string, std::vector<std::string>> path_cache;
+static std::vector<std::string> history;
+static size_t his_pos{};
+
+void append_his(const std::string& his)
+{
+    history.push_back(his);
+    his_pos = history.size();
+}
+
+std::string up_his()
+{
+    if (history.size() < 1) {
+        return "";
+    }
+
+    if (his_pos >= 1) {
+        --his_pos;
+        return history[his_pos];
+    } else {
+        return history[0];
+    }
+}
+
+std::string next_his()
+{
+    if (history.size() < 1) {
+        return "";
+    }
+
+    if (his_pos < (history.size() - 1)) {
+        ++his_pos;
+        return history[his_pos];
+    } else {
+        his_pos = history.size();
+        return "";
+    }
+}
 
 void flush_content(const std::string& search_dir, std::vector<std::string>& out)
 {
@@ -234,6 +271,34 @@ size_t get_u8_len(unsigned char ch)
     return 0;
 }
 
+std::vector<std::vector<char>> str_to_vec(const std::string& source)
+{
+    std::vector<std::vector<char>> result;
+    for (size_t i = 0; i < source.size();) {
+        std::vector<char> b;
+        char curch = source[i];
+        b.push_back(curch);
+        if (curch >= 0) {
+            result.push_back(b);
+            ++i;
+        } else {
+#if defined(BINARY_GBK)
+            size_t length = 2;
+#else
+            size_t length = get_u8_len(curch);
+#endif
+            for (size_t z = 1; z < length; ++z) {
+                if ((i + z) < source.size()) {
+                    b.push_back(source[i + z]);
+                }
+            }
+            result.push_back(b);
+            i += length;
+        }
+    }
+    return result;
+}
+
 void supply(std::vector<char>& wch, char ch)
 {
 #if defined(BINARY_GBK)
@@ -462,6 +527,7 @@ char* fc_readline()
 
         switch (ch) {
         case ENTER:
+            append_his(main_buf);
             return main_buf;
 #if defined(OS_WINDOWS)
         case CTRL_C: {
@@ -482,29 +548,7 @@ char* fc_readline()
         case TAB: {
             // 在这里补全
             if (!str_predict.empty()) {
-                std::vector<std::vector<char>> temp;
-                for (size_t i = 0; i < str_predict.size();) {
-                    std::vector<char> b;
-                    char curch = str_predict[i];
-                    b.push_back(curch);
-                    if (curch >= 0) {
-                        temp.push_back(b);
-                        ++i;
-                    } else {
-#if defined(BINARY_GBK)
-                        size_t length = 2;
-#else
-                        size_t length = get_u8_len(curch);
-#endif
-                        for (size_t z = 1; z < length; ++z) {
-                            if ((i + z) < str_predict.size()) {
-                                b.push_back(str_predict[i + z]);
-                            }
-                        }
-                        temp.push_back(b);
-                        i += length;
-                    }
-                }
+                auto temp = str_to_vec(str_predict);
                 str_predict.clear();
                 for (const auto& item : temp) {
                     add_newer(item);
@@ -536,10 +580,29 @@ char* fc_readline()
                     ++wo;
                 }
                 break;
-            case UP:
+            case UP: {
+                auto up_str = up_his();
+                buf.clear();
+                auto t = str_to_vec(up_str);
+                if (t.size() > 0) {
+                    buf.insert(buf.end(), t.begin(), t.end());
+                }
+                len = buf.size();
+                wo = len;
                 break;
-            case DOWN:
+            }
+
+            case DOWN: {
+                auto next_str = next_his();
+                buf.clear();
+                auto t = str_to_vec(next_str);
+                if (t.size() > 0) {
+                    buf.insert(buf.end(), t.begin(), t.end());
+                }
+                len = buf.size();
+                wo = len;
                 break;
+            }
             case DEL:
                 // Edit buffer like DELETE key
 #if defined(OS_UNIX)

main.cpp

@@ -10,8 +10,8 @@ int main(int argc, char** argv)
     while (1) {
         char* content = fc_readline();
         if (content) {
-            std::cout << std::string(content) << std::endl;
             fc_free(content);
+            std::cout << "" << std::endl;
         }
     }
     return 0;