修复了未初始化时ui显示模块内存越界的问题，优化了代码结构 (#789)

kernel/src/libs/lib_ui/textui_no_alloc.rs

@@ -30,36 +30,38 @@ pub fn textui_init_no_alloc(video_enabled: bool) {
     }
 }
 
+fn next_line() {
+    NO_ALLOC_OPERATIONS_INDEX.store(0, Ordering::SeqCst);
+    NO_ALLOC_OPERATIONS_LINE.fetch_add(1, Ordering::SeqCst);
+    if NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst) >= TRUE_LINE_NUM.load(Ordering::SeqCst) {
+        NO_ALLOC_OPERATIONS_LINE.store(0, Ordering::SeqCst);
+    }
+}
+
 pub fn no_init_textui_putchar_window(
     character: char,
     frcolor: FontColor,
     bkcolor: FontColor,
     is_put_to_window: bool,
 ) -> Result<(), SystemError> {
-    if NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst) >= TRUE_LINE_NUM.load(Ordering::SeqCst) {
-        NO_ALLOC_OPERATIONS_LINE.store(0, Ordering::SeqCst);
-    }
     //字符'\0'代表ASCII码表中的空字符,表示字符串的结尾
     if unlikely(character == '\0') {
         return Ok(());
     }
     send_to_default_serial8250_port(&[character as u8]);
 
+    if is_put_to_window {
+        match character {
             // 进行换行操作
-    if unlikely(character == '\n') {
-        // 换行时还需要输出\r
+            '\n' => {
                 send_to_default_serial8250_port(&[b'\r']);
                 if is_put_to_window {
-            NO_ALLOC_OPERATIONS_LINE.fetch_add(1, Ordering::SeqCst);
-            NO_ALLOC_OPERATIONS_INDEX.store(0, Ordering::SeqCst);
+                    next_line();
                 }
-        return Ok(());
             }
             // 输出制表符
-    else if character == '\t' {
-        if is_put_to_window {
+            '\t' => {
                 let char = TextuiCharChromatic::new(Some(' '), frcolor, bkcolor);
-
                 //打印的空格数（注意将每行分成一个个表格，每个表格为8个字符）
                 let mut space_to_print = 8 - NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst) % 8;
                 while space_to_print > 0 {
@@ -70,12 +72,9 @@ pub fn no_init_textui_putchar_window(
                     NO_ALLOC_OPERATIONS_INDEX.fetch_add(1, Ordering::SeqCst);
                     space_to_print -= 1;
                 }
-            return Ok(());
-        }
             }
             // 字符 '\x08' 代表 ASCII 码中的退格字符。它在输出中的作用是将光标向左移动一个位置，并在该位置上输出后续的字符，从而实现字符的删除或替换。
-    else if character == '\x08' {
-        if is_put_to_window {
+            '\x08' => {
                 NO_ALLOC_OPERATIONS_INDEX.fetch_sub(1, Ordering::SeqCst);
                 let op_char = NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst);
                 if op_char >= 0 {
@@ -98,15 +97,16 @@ pub fn no_init_textui_putchar_window(
                     }
                 }
             }
-    } else if is_put_to_window {
             // 输出其他字符
+            _ => {
                 let char = TextuiCharChromatic::new(Some(character), frcolor, bkcolor);
 
-        if NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst) == CHAR_PER_LINE.load(Ordering::SeqCst)
+                if NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst)
+                    == CHAR_PER_LINE.load(Ordering::SeqCst)
                 {
-            NO_ALLOC_OPERATIONS_INDEX.store(0, Ordering::SeqCst);
-            NO_ALLOC_OPERATIONS_LINE.fetch_add(1, Ordering::SeqCst);
+                    next_line();
                 }
+
                 char.no_init_textui_render_chromatic(
                     LineId::new(NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst)),
                     LineIndex::new(NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst)),
@@ -114,6 +114,7 @@ pub fn no_init_textui_putchar_window(
 
                 NO_ALLOC_OPERATIONS_INDEX.fetch_add(1, Ordering::SeqCst);
             }
-
+        }
+    }
     return Ok(());
 }