handle：处理窗口尺寸变化后多行显示崩溃问题。

.vscode/settings.json

@@ -5,7 +5,7 @@
     "terminal.integrated.fontFamily": "Source Code Pro",
     "cmake.configureOnOpen": true,
     "cmake.debugConfig": {
-        "console": "integratedTerminal",
+        "console": "externalTerminal",
         "setupCommands": [
             {
                 "description": "-gdb-set charset utf-8",
@@ -33,5 +33,44 @@
         "ja": true,
         "zh-hant": true,
         "zh-hans": true
+    },
+    "files.associations": {
+        "cmath": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cstring": "cpp",
+        "cwchar": "cpp",
+        "exception": "cpp",
+        "initializer_list": "cpp",
+        "ios": "cpp",
+        "iosfwd": "cpp",
+        "iostream": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "memory": "cpp",
+        "new": "cpp",
+        "ostream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "string": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "typeinfo": "cpp",
+        "utility": "cpp",
+        "vector": "cpp",
+        "xfacet": "cpp",
+        "xiosbase": "cpp",
+        "xlocale": "cpp",
+        "xlocinfo": "cpp",
+        "xlocnum": "cpp",
+        "xmemory": "cpp",
+        "xmemory0": "cpp",
+        "xstddef": "cpp",
+        "xstring": "cpp",
+        "xtr1common": "cpp",
+        "xutility": "cpp"
     }
 }

filecomplete.cpp

@@ -69,18 +69,39 @@
 #define SPACE 32
 #define TAB 9
 
+constexpr int buf_size = 1024 * 100;
 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{};
 
-short terminal_width();
 void clear_line();
 void set_cursor_x(short x);
 short get_cursor_y();
-char* readline();
+char* fc_readline();
 void color_print(char* text, COLOR_TYPE color);
 
+std::pair<short, short> get_wh()
+{
+    HANDLE h_console = GetStdHandle(STD_OUTPUT_HANDLE);
+    if (h_console == NULL) {
+        fprintf(stderr, "[ERROR] Couldn't handle terminal\n");
+        exit(1);
+    }
+    CONSOLE_SCREEN_BUFFER_INFO console_info;
+    if (GetConsoleScreenBufferInfo(h_console, &console_info) == 0) {
+        fprintf(stderr, "[ERROR] Couldn't get terminal info\n");
+        exit(1);
+    }
+    int cw = console_info.srWindow.Right - console_info.srWindow.Left + 1;
+    int ch = console_info.srWindow.Bottom - console_info.srWindow.Top + 1;
+    auto w = static_cast<short>(cw);
+    auto h = static_cast<short>(ch);
+    return std::make_pair(w, h);
+}
+
 void supply(std::vector<char>& wch, char ch)
 {
     wch.push_back(ch);
@@ -91,42 +112,11 @@ void supply(std::vector<char>& wch, char ch)
     wch.push_back(tch);
 }
 
-short terminal_width()
-{
-#if defined(OS_WINDOWS)
-    // Handle current terminal
-    HANDLE h_console = GetStdHandle(STD_OUTPUT_HANDLE);
-    if (h_console == NULL) {
-        fprintf(stderr, "[ERROR] Couldn't handle terminal\n");
-        exit(1);
-    }
-
-    // Get current attributes
-    CONSOLE_SCREEN_BUFFER_INFO console_info;
-    if (GetConsoleScreenBufferInfo(h_console, &console_info) == 0) {
-        fprintf(stderr, "[ERROR] Couldn't get terminal info\n");
-        exit(1);
-    }
-
-    // Return current width
-    return console_info.dwSize.X;
-#elif defined(OS_UNIX)
-    struct winsize t_size;
-
-    if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &t_size) == -1) {
-        fprintf(stderr, "[ERROR] Couldn't get terminal info\n");
-        exit(1);
-    }
-
-    return (short)t_size.ws_col;
-#endif
-}
-
 void clear_line()
 {
 #if defined(OS_WINDOWS)
     // Get current terminal width
-    short width = terminal_width();
+    short width = get_wh().first;
     if (width < 1) {
         fprintf(stderr, "[ERROR] Size of terminal is too small\n");
         exit(1);
@@ -164,14 +154,19 @@ void set_cursor_x(short x)
         exit(1);
     }
 
+    auto wh = get_wh();
     // Create position
     COORD xy;
-    xy.X = x - 1;
     xy.Y = get_cursor_y();
+    short px = x % wh.first - 1;
+    xy.X = px < 0 ? 0 : px;
 
     // Set cursor position
     if (SetConsoleCursorPosition(h_console, xy) == 0) {
-        fprintf(stderr, "[ERROR] Couldn't set terminal cursor position\n");
+        auto code = GetLastError();
+        fprintf(stderr,
+                "[ERROR] Couldn't set terminal cursor position, err=%lu\n",
+                code);
         exit(1);
     }
 #elif defined(OS_UNIX)
@@ -254,17 +249,14 @@ short get_cursor_y()
 #endif
 }
 
-char* readline()
+char* fc_readline()
 {
-    short buff_cap = terminal_width();
+    char* buffer = (char*)calloc((size_t)buf_size, sizeof(char));
-    char* buffer = (char*)calloc((size_t)buff_cap, sizeof(char));
     if (buffer == NULL) {
         fprintf(stderr, "[ERROR] Couldn't allocate memory for buffer\n");
         exit(1);
     }
 
-    short buff_len = 0;
-
     // Current hint number
     int hint_num = 0;
     while (1) {
@@ -353,8 +345,7 @@ char* readline()
                     }
                     buf[wo] = word;
                 }
-			}
+            } else {
-			else {
                 buf.push_back(word);
             }
             ++wo;
@@ -366,6 +357,11 @@ char* readline()
     return buffer;
 }
 
+void fc_free(char* str)
+{
+    free(str);
+}
+
 void color_print(char* text, COLOR_TYPE color)
 {
 #if defined(OS_WINDOWS)
@@ -384,6 +380,8 @@ void color_print(char* text, COLOR_TYPE color)
         exit(1);
     }
 
+    auto wh = get_wh();
+
     backup = console_info.wAttributes;
 
     // Print colored text

filecomplete.h

@@ -1,3 +1,4 @@
 #pragma once
 
-char* readline();
+char* fc_readline();
+void fc_free(char* str);

main.cpp

@@ -4,11 +4,13 @@
 
 int main(int argc, char** argv)
 {
+    std::cout << "PreContent1 " << std::endl;
+    std::cout << "PreContent2 " << std::endl;
     while (1) {
-        char* content = readline();
+        char* content = fc_readline();
         if (content) {
             std::cout << std::string(content) << std::endl;
-            free(content);
+            fc_free(content);
         }
     }
     return 0;