更换为wpf

2025-05-27 15:55:10 +08:00
parent d0f629d9ba
commit 17257a0ffe
316 changed files with 19206 additions and 76537 deletions
--- a/Spine/Utils/Utf8Validator.cs
+++ b/Spine/Utils/Utf8Validator.cs
@@ -0,0 +1,99 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Spine.Utils
+{
+    /// <summary>
+    /// UTF8 格式检测工具类
+    /// </summary>
+    public static class Utf8Validator
+    {
+        /// <summary>
+        /// 判断某段数据是否是 UTF8 格式, 会忽略尾部不完整数据
+        /// </summary>
+        public static bool IsUtf8(byte[] data, int maxLength = 1024)
+        {
+            int length = Math.Min(data.Length, maxLength);
+
+            int start = 0;
+            if (length >= 3 && data[0] == 0xEF && data[1] == 0xBB && data[2] == 0xBF)
+            {
+                start = 3;
+            }
+
+            int expectedContinuationBytes = 0;
+            for (int i = start; i < length; i++)
+            {
+                byte currentByte = data[i];
+
+                if (expectedContinuationBytes == 0)
+                {
+                    if ((currentByte & 0x80) == 0x00)
+                    {
+                        // 0xxxxxxx，ASCII 字符
+                        continue;
+                    }
+
+                    // 计算需要的续字节数
+                    int needed;
+                    if ((currentByte & 0xE0) == 0xC0)
+                    {
+                        // 110xxxxx，1 个续字节
+                        if (currentByte == 0xC0 || currentByte == 0xC1)
+                            return false; // 避免过长编码
+                        needed = 1;
+                    }
+                    else if ((currentByte & 0xF0) == 0xE0)
+                    {
+                        // 1110xxxx，2 个续字节
+                        needed = 2;
+                    }
+                    else if ((currentByte & 0xF8) == 0xF0)
+                    {
+                        // 11110xxx，3 个续字节
+                        if (currentByte > 0xF4)
+                            return false; // 超出 Unicode 范围
+                        needed = 3;
+                    }
+                    else
+                    {
+                        // 非法的起始字节
+                        return false;
+                    }
+
+                    // 如果剩余字节不足以完成这个字符，就当作“尾部不完整”，跳出主循环
+                    if (i + needed >= length)
+                        break;
+
+                    // 否则进入续字节检查
+                    expectedContinuationBytes = needed;
+                }
+                else
+                {
+                    // 检查续字节（10xxxxxx）
+                    if ((currentByte & 0xC0) != 0x80)
+                        return false;
+                    expectedContinuationBytes--;
+                }
+            }
+
+            // 如果在跳出时，expectedContinuationBytes>0，说明我们跳过了一些尾部续字节，
+            // 本着“忽略尾部不完整字符”的原则，仍然返回 true
+            return expectedContinuationBytes == 0;
+        }
+
+        /// <summary>
+        /// 判断某个文件是否是 UTF8 格式, 会忽略尾部不完整数据
+        /// </summary>
+        public static bool IsUtf8(string path, int maxLength = 1024)
+        {
+            using var stream = File.OpenRead(path);
+            byte[] data = new byte[maxLength];
+            var actualLength = stream.Read(data, 0, data.Length);
+            return IsUtf8(data, actualLength);
+        }
+    }
+}