compile：细节修正。

Makefile

@@ -0,0 +1,34 @@
+# 编译器和编译选项
+CXX = g++
+CXXFLAGS = -Wall -Wextra -std=c++17 -O2
+
+# 文件和目标
+LIB_SRC = filecomplete.cpp
+LIB_OBJ = $(LIB_SRC:.cpp=.o)
+LIB_HEADER = filecomplete.h
+
+MAIN_SRC = main.cpp
+MAIN_OBJ = $(MAIN_SRC:.cpp=.o)
+TARGET = main
+
+# 默认目标
+all: $(TARGET)
+
+# 生成目标文件
+$(TARGET): $(LIB_OBJ) $(MAIN_OBJ)
+	$(CXX) $(CXXFLAGS) -o $@ $^
+
+# 编译库源文件
+$(LIB_OBJ): $(LIB_SRC) $(LIB_HEADER)
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+# 编译主程序文件
+$(MAIN_OBJ): $(MAIN_SRC)
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+# 清理生成文件
+clean:
+	rm -f $(LIB_OBJ) $(MAIN_OBJ) $(TARGET)
+
+# 伪目标
+.PHONY: all clean

filecomplete.cpp

@@ -83,8 +83,6 @@ static std::vector<std::vector<char>> buf{};
 static std::vector<char> word{};
 static size_t wo{};
 static size_t len{};
-static short cy{};
-static short cx{};
 static char* main_buf{};
 
 void trans2buf(char* buffer);
@@ -210,9 +208,9 @@ std::pair<short, short> get_wh()
 #endif
 }
 
-int get_u8_len(unsigned char ch)
+size_t get_u8_len(unsigned char ch)
 {
-    if (ch >= 0x00 && ch <= 0x7F) {
+    if (ch <= 0x7F) {
         return 1;
     } else if ((ch & 0xE0) == 0xC0) {
         return 2;
@@ -225,8 +223,10 @@ int get_u8_len(unsigned char ch)
     } else if ((ch & 0xFE) == 0xFC) {
         return 6;
     } else {
-        return 0;
+        printf("invalid u8 first ch.");
+        exit(1);
     }
+    return 0;
 }
 
 void supply(std::vector<char>& wch, char ch)
@@ -436,13 +436,13 @@ char* fc_readline()
             color_print(str_predict.data(), DEFAULT_PREDICT_COLOR);
         }
         // Move cursor
-        int cur_pos{};
+        size_t cur_pos{};
 #if defined(STRCODE_GBK)
         for (int i = 0; i < buf.size() && i < wo; ++i) {
-            cur_pos += static_cast<int>(buf[i].size());
+            cur_pos += buf[i].size();
         }
 #else
-        for (int i = 0; i < buf.size() && i < wo; ++i) {
+        for (size_t i = 0; i < buf.size() && i < wo; ++i) {
             if (buf[i].size() > 1) {
                 cur_pos += 2;
             } else {
@@ -477,20 +477,20 @@ char* fc_readline()
             // 在这里补全
             if (!str_predict.empty()) {
                 std::vector<std::vector<char>> temp;
-                for (int i = 0; i < str_predict.size();) {
+                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 && curch < 128) {
+                    if (curch >= 0) {
                         temp.push_back(b);
                         ++i;
                     } else {
 #if defined(STRCODE_GBK)
-                        int length = 2;
+                        size_t length = 2;
 #else
-                        int length = get_u8_len(curch);
+                        size_t length = get_u8_len(curch);
 #endif
-                        for (int z = 1; z < length; ++z) {
+                        for (size_t z = 1; z < length; ++z) {
                             if ((i + z) < str_predict.size()) {
                                 b.push_back(str_predict[i + z]);
                             }
@@ -521,10 +521,14 @@ char* fc_readline()
 #endif
             switch (_getch()) {
             case LEFT:
-                wo = wo < 1 ? 0 : (--wo);
+                if (wo > 0) {
+                    --wo;
+                }
                 break;
             case RIGHT:
-                wo = wo >= len ? len : (++wo);
+                if (wo < len) {
+                    ++wo;
+                }
                 break;
             case UP:
                 break;