add windows platform to ydb github export

1 files changed, 125 insertions, 0 deletions

diff --git a/util/folder/dirent_win.c b/util/folder/dirent_win.c
new file mode 100644
index 0000000000..7e6db74ce5
--- /dev/null
+++ b/util/folder/dirent_win.c
@@ -0,0 +1,125 @@
+#include <util/system/defaults.h>
+
+#ifdef _win_
+
+    #include <stdio.h>
+    #include "dirent_win.h"
+
+    #if defined(_MSC_VER) && (_MSC_VER < 1900)
+void __cdecl _dosmaperr(unsigned long);
+
+static void SetErrno() {
+    _dosmaperr(GetLastError());
+}
+    #else
+void __cdecl __acrt_errno_map_os_error(unsigned long const oserrno);
+
+static void SetErrno() {
+    __acrt_errno_map_os_error(GetLastError());
+}
+    #endif
+
+struct DIR* opendir(const char* dirname) {
+    struct DIR* dir = (struct DIR*)malloc(sizeof(struct DIR));
+    if (!dir) {
+        return NULL;
+    }
+    dir->sh = INVALID_HANDLE_VALUE;
+    dir->fff_templ = NULL;
+    dir->file_no = 0;
+    dir->readdir_buf = NULL;
+
+    int len = strlen(dirname);
+    //Remove trailing slashes
+    while (len && (dirname[len - 1] == '\\' || dirname[len - 1] == '/')) {
+        --len;
+    }
+    int len_converted = MultiByteToWideChar(CP_UTF8, 0, dirname, len, 0, 0);
+    if (len_converted == 0) {
+        closedir(dir);
+        return NULL;
+    }
+    dir->fff_templ = (WCHAR*)malloc((len_converted + 5) * sizeof(WCHAR));
+    if (!dir->fff_templ) {
+        closedir(dir);
+        return NULL;
+    }
+    MultiByteToWideChar(CP_UTF8, 0, dirname, len, dir->fff_templ, len_converted);
+
+    WCHAR append[] = {'\\', '*', '.', '*', 0};
+    memcpy(dir->fff_templ + len_converted, append, sizeof(append));
+    dir->sh = FindFirstFileW(dir->fff_templ, &dir->wfd);
+    if (dir->sh == INVALID_HANDLE_VALUE) {
+        SetErrno();
+        closedir(dir);
+        return NULL;
+    }
+
+    return dir;
+}
+
+int closedir(struct DIR* dir) {
+    if (dir->sh != INVALID_HANDLE_VALUE)
+        FindClose(dir->sh);
+    free(dir->fff_templ);
+    free(dir->readdir_buf);
+    free(dir);
+    return 0;
+}
+
+int readdir_r(struct DIR* dir, struct dirent* entry, struct dirent** result) {
+    if (!FindNextFileW(dir->sh, &dir->wfd)) {
+        int err = GetLastError();
+        *result = 0;
+        if (err == ERROR_NO_MORE_FILES) {
+            SetLastError(0);
+            return 0;
+        } else {
+            return err;
+        }
+    }
+    entry->d_fileno = dir->file_no++;
+    entry->d_reclen = sizeof(struct dirent);
+    if (dir->wfd.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT &&
+        (dir->wfd.dwReserved0 == IO_REPARSE_TAG_MOUNT_POINT || dir->wfd.dwReserved0 == IO_REPARSE_TAG_SYMLINK))
+    {
+        entry->d_type = DT_LNK;
+    } else if (dir->wfd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
+        entry->d_type = DT_DIR;
+    } else {
+        entry->d_type = DT_REG;
+    }
+    int len = lstrlenW(dir->wfd.cFileName);
+    int conv_len = WideCharToMultiByte(CP_UTF8, 0, dir->wfd.cFileName, len, 0, 0, 0, 0);
+    if (conv_len == 0) {
+        return -1;
+    }
+    if (conv_len > sizeof(entry->d_name) - 1) {
+        SetLastError(ERROR_INSUFFICIENT_BUFFER);
+        return ERROR_INSUFFICIENT_BUFFER;
+    }
+    entry->d_namlen = conv_len;
+    WideCharToMultiByte(CP_UTF8, 0, dir->wfd.cFileName, len, entry->d_name, conv_len, 0, 0);
+    entry->d_name[conv_len] = 0;
+    *result = entry;
+    return 0;
+}
+
+struct dirent* readdir(struct DIR* dir) {
+    struct dirent* res;
+    if (!dir->readdir_buf) {
+        dir->readdir_buf = (struct dirent*)malloc(sizeof(struct dirent));
+        if (dir->readdir_buf == 0)
+            return 0;
+    }
+    readdir_r(dir, dir->readdir_buf, &res);
+    return res;
+}
+
+void rewinddir(struct DIR* dir) {
+    FindClose(dir->sh);
+    dir->sh = FindFirstFileW(dir->fff_templ, &dir->wfd);
+    dir->file_no = 0;
+}
+
+#endif //_win_