Uploaded Test files

2020-11-12 11:05:57 -05:00 · 2020-11-12 11:05:57 -05:00 · 2e81cb7d99
commit 2e81cb7d99
parent f584ad9d97
16627 changed files with 2065359 additions and 102444 deletions
--- a/venv/Lib/site-packages/win32/Demos/CreateFileTransacted_MiniVersion.py
+++ b/venv/Lib/site-packages/win32/Demos/CreateFileTransacted_MiniVersion.py
@ -0,0 +1,81 @@
+"""
+This demonstrates the creation of miniversions of a file during a transaction.
+The FSCTL_TXFS_CREATE_MINIVERSION control code saves any changes to a new
+miniversion (effectively a savepoint within a transaction).
+"""
+
+import win32file, win32api, win32transaction, winerror
+import win32con, winioctlcon
+import struct
+import os
+from pywin32_testutil import str2bytes # py3k-friendly helper
+
+def demo():
+    """
+    Definition of buffer used with FSCTL_TXFS_CREATE_MINIVERSION:
+    typedef struct _TXFS_CREATE_MINIVERSION_INFO{
+        USHORT StructureVersion;
+        USHORT StructureLength;
+        ULONG BaseVersion;
+        USHORT MiniVersion;}
+    """
+    buf_fmt='HHLH0L'   ## buffer size must include struct padding
+    buf_size=struct.calcsize(buf_fmt)
+
+    tempdir=win32api.GetTempPath()
+    tempfile=win32api.GetTempFileName(tempdir,'cft')[0]
+    print("Demonstrating transactions on tempfile", tempfile)
+    f=open(tempfile,'w')
+    f.write('This is original file.\n')
+    f.close()
+
+    trans=win32transaction.CreateTransaction(Description='Test creating miniversions of a file')
+    hfile=win32file.CreateFileW(tempfile, win32con.GENERIC_READ|win32con.GENERIC_WRITE,
+        win32con.FILE_SHARE_READ|win32con.FILE_SHARE_WRITE,
+        None, win32con.OPEN_EXISTING, 0 , None, Transaction=trans)
+
+    win32file.WriteFile(hfile, str2bytes('This is first miniversion.\n'))
+    buf=win32file.DeviceIoControl(hfile, winioctlcon.FSCTL_TXFS_CREATE_MINIVERSION,None,buf_size,None)
+    struct_ver, struct_len, base_ver, ver_1=struct.unpack(buf_fmt, buf)
+
+    win32file.SetFilePointer(hfile, 0, win32con.FILE_BEGIN)
+    win32file.WriteFile(hfile, str2bytes('This is second miniversion!\n'))
+    buf=win32file.DeviceIoControl(hfile, winioctlcon.FSCTL_TXFS_CREATE_MINIVERSION,None,buf_size,None)
+    struct_ver, struct_len, base_ver, ver_2=struct.unpack(buf_fmt, buf)
+    hfile.Close()
+
+    ## miniversions can't be opened with write access
+    hfile_0=win32file.CreateFileW(tempfile, win32con.GENERIC_READ,
+        win32con.FILE_SHARE_READ|win32con.FILE_SHARE_WRITE,
+        None, win32con.OPEN_EXISTING, 0 , None, Transaction=trans, MiniVersion=base_ver)
+    print('version:',base_ver,win32file.ReadFile(hfile_0, 100))
+    hfile_0.Close()
+
+    hfile_1=win32file.CreateFileW(tempfile, win32con.GENERIC_READ,
+        win32con.FILE_SHARE_READ|win32con.FILE_SHARE_WRITE,
+        None, win32con.OPEN_EXISTING, 0 , None, Transaction=trans, MiniVersion=ver_1)
+    print('version:',ver_1,win32file.ReadFile(hfile_1, 100))
+    hfile_1.Close()
+
+    hfile_2=win32file.CreateFileW(tempfile, win32con.GENERIC_READ,
+        win32con.FILE_SHARE_READ|win32con.FILE_SHARE_WRITE,
+        None, win32con.OPEN_EXISTING, 0 , None, Transaction=trans, MiniVersion=ver_2)
+    print('version:',ver_2,win32file.ReadFile(hfile_2, 100))
+    hfile_2.Close()
+
+    ## MiniVersions are destroyed when transaction is committed or rolled back
+    win32transaction.CommitTransaction(trans)
+
+    os.unlink(tempfile)
+
+if __name__ == "__main__":
+    # When run on CI, this fails with NOT_SUPPORTED, so don't have that cause "failure"
+    try:
+        demo()
+    except win32file.error as e:
+        if e.winerror == winerror.ERROR_NOT_SUPPORTED:
+            print("These features are not supported by this filesystem.")
+        else:
+            raise
+
+