From 28a89016c47a921b18321e0557ec6114046a883c Mon Sep 17 00:00:00 2001
From: Gang Wu <ustcwg@gmail.com>
Date: Wed, 10 Apr 2024 23:22:26 +0800
Subject: [PATCH] ORC-1686: [C++] Avoid using std::filesystem

---
 c++/src/Adaptor.cc    | 16 ++++++++++++++++
 c++/src/Adaptor.hh.in |  1 +
 c++/src/Timezone.cc   |  3 +--
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/c++/src/Adaptor.cc b/c++/src/Adaptor.cc
index d9390131b6..d5dd7802f3 100644
--- a/c++/src/Adaptor.cc
+++ b/c++/src/Adaptor.cc
@@ -53,6 +53,12 @@ ssize_t pread(int fd, void* buf, size_t size, off_t offset) {
 #endif
 #endif
 
+#ifdef _MSC_VER
+#include <Windows.h>
+#else
+#include <sys/stat.h>
+#endif
+
 namespace orc {
 #ifdef HAS_DOUBLE_TO_STRING
   std::string to_string(double val) {
@@ -73,4 +79,14 @@ namespace orc {
     return std::to_string(static_cast<long long int>(val));
   }
 #endif
+
+  bool fileExists(const char* path) {
+#ifdef _MSC_VER
+    return GetFileAttributesA(path) != INVALID_FILE_ATTRIBUTES;
+#else
+    struct stat st;
+    return stat(path, &st) == 0;
+#endif
+  }
+
 }  // namespace orc
diff --git a/c++/src/Adaptor.hh.in b/c++/src/Adaptor.hh.in
index b0edc3e3e9..2cce8158e2 100644
--- a/c++/src/Adaptor.hh.in
+++ b/c++/src/Adaptor.hh.in
@@ -110,6 +110,7 @@ typedef SSIZE_T ssize_t;
 namespace orc {
   std::string to_string(double val);
   std::string to_string(int64_t val);
+  bool fileExists(const char* path);
 }
 
 #ifdef HAS_BUILTIN_OVERFLOW_CHECK
diff --git a/c++/src/Timezone.cc b/c++/src/Timezone.cc
index fbad35fbcf..32276a850d 100644
--- a/c++/src/Timezone.cc
+++ b/c++/src/Timezone.cc
@@ -24,7 +24,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
-#include <filesystem>
 #include <map>
 #include <sstream>
 
@@ -675,7 +674,7 @@ namespace orc {
     if (itr != timezoneCache.end()) {
       return *(itr->second).get();
     }
-    if (!std::filesystem::exists(std::filesystem::path(filename))) {
+    if (!fileExists(filename.c_str())) {
       std::stringstream ss;
       ss << "Time zone file " << filename << " does not exist."
          << " Please install IANA time zone database and set TZDIR env.";