Fix #3171 : 去掉生成绝对路径函数中的窄字符WindowsAPI调用，改用宽字符API和C++17 std::filesystem来避免win平台中文路径问题

sherpa-onnx/csrc/file-utils.cc

@@ -5,24 +5,30 @@
 #include "sherpa-onnx/csrc/file-utils.h"
 
 #include <fstream>
+#include <filesystem>
 #include <memory>
 #include <sstream>
 #include <string>
 #include <vector>
 
-#ifdef _WIN32
-#include <windows.h>
-#else
-#include <limits.h>
-#include <stdlib.h>
-#endif
-
 #include "sherpa-onnx/csrc/macros.h"
 
 namespace sherpa_onnx {
+std::wstring ToWideString(const std::string &s);
 
 bool FileExists(const std::string &filename) {
-  return std::ifstream(filename).good();
+  try {
+#ifdef _WIN32
+    std::wstring wide_path = ToWideString(filename);
+    std::filesystem::path file_path(wide_path);
+#else
+    std::filesystem::path file_path(filename);
+#endif
+    return std::filesystem::exists(file_path) && 
+           std::filesystem::is_regular_file(file_path);
+  } catch (const std::exception&) {
+    return false;
+  }
 }
 
 void AssertFileExists(const std::string &filename) {
@@ -33,20 +39,30 @@ void AssertFileExists(const std::string &filename) {
 }
 
 std::vector<char> ReadFile(const std::string &filename) {
-  std::ifstream file(filename, std::ios::binary | std::ios::ate);
-  if (!file.is_open()) {
-    return {};
-  }
+  try {
+#ifdef _WIN32
+    std::wstring wide_path = ToWideString(filename);
+    std::filesystem::path file_path(wide_path);
+#else
+    std::filesystem::path file_path(filename);
+#endif
+    std::ifstream file(file_path, std::ios::binary | std::ios::ate);
+    if (!file.is_open()) {
+      return {};
+    }
+
+    std::streamsize size = file.tellg();
+    file.seekg(0, std::ios::beg);
 
-  std::streamsize size = file.tellg();
-  file.seekg(0, std::ios::beg);
+    std::vector<char> buffer(size);
+    if (!file.read(buffer.data(), size)) {
+      return {};
+    }
 
-  std::vector<char> buffer(size);
-  if (!file.read(buffer.data(), size)) {
+    return buffer;
+  } catch (const std::exception&) {
     return {};
   }
-
-  return buffer;
 }
 
 #if __ANDROID_API__ >= 9
@@ -119,33 +135,28 @@ std::string ResolveAbsolutePath(const std::string &path) {
     return path;
   }
 
+  try {
 #ifdef _WIN32
-  // Check if path is already absolute (drive letter or UNC path)
-  if ((path.size() > 1 && path[1] == ':') ||
-      (path.size() > 1 && path[0] == '\\' && path[1] == '\\')) {
-    return path;
-  }
-
-  char buffer[MAX_PATH];
-  if (GetFullPathNameA(path.c_str(), MAX_PATH, buffer, nullptr)) {
-    return std::string(buffer);
-  }
-
-  return path;  // fallback on failure
-
+    std::wstring wide_path = ToWideString(path);
+    std::filesystem::path fs_path(wide_path);
 #else
-  // POSIX: absolute paths start with '/'
-  if (path[0] == '/') {
+    std::filesystem::path fs_path(path);
+#endif
+
+    // If already absolute, return normalized path
+    if (fs_path.is_absolute()) {
+      return fs_path.lexically_normal().u8string();
+    }
+
+    // Convert to absolute path and normalize
+    std::filesystem::path abs_path = std::filesystem::absolute(fs_path);
+    abs_path = abs_path.lexically_normal();
+
+    return abs_path.u8string();
+  } catch (const std::exception&) {
+    // If conversion fails, return original path
     return path;
   }
-
-  char buffer[PATH_MAX];
-  if (realpath(path.c_str(), buffer)) {
-    return std::string(buffer);
-  }
-
-  return path;  // fallback on failure
-#endif
 }
 
 }  // namespace sherpa_onnx