Uploaded Test files

venv/Lib/site-packages/win32/Demos/mmapfile_demo.py

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+import win32api, mmapfile
+import winerror
+import tempfile, os
+from pywin32_testutil import str2bytes
+
+system_info=win32api.GetSystemInfo()
+page_size=system_info[1]
+alloc_size=system_info[7]
+
+fname=tempfile.mktemp()
+mapping_name=os.path.split(fname)[1]
+fsize=8*page_size
+print(fname, fsize, mapping_name)
+
+m1=mmapfile.mmapfile(File=fname, Name=mapping_name, MaximumSize=fsize)
+m1.seek(100)
+m1.write_byte(str2bytes('?'))
+m1.seek(-1,1)
+assert m1.read_byte()==str2bytes('?')
+
+## A reopened named mapping should have exact same size as original mapping
+m2=mmapfile.mmapfile(Name=mapping_name, File=None, MaximumSize=fsize*2)
+assert m2.size()==m1.size()
+m1.seek(0,0)
+m1.write(fsize*str2bytes('s'))
+assert m2.read(fsize)==fsize*str2bytes('s')
+
+move_src=100
+move_dest=500
+move_size=150
+
+m2.seek(move_src,0)
+assert m2.tell()==move_src
+m2.write(str2bytes('m')*move_size)
+m2.move(move_dest, move_src, move_size)
+m2.seek(move_dest, 0)
+assert m2.read(move_size) ==  str2bytes('m') * move_size
+##    m2.write('x'* (fsize+1))
+
+m2.close()
+m1.resize(fsize*2)
+assert m1.size()==fsize * 2
+m1.seek(fsize)
+m1.write(str2bytes('w') * fsize)
+m1.flush()
+m1.close()
+os.remove(fname)
+
+
+
+## Test a file with size larger than 32 bits
+## need 10 GB free on drive where your temp folder lives
+fname_large=tempfile.mktemp()
+mapping_name='Pywin32_large_mmap'
+offsetdata=str2bytes('This is start of offset')
+
+## Deliberately use odd numbers to test rounding logic
+fsize = (1024*1024*1024*10) + 333
+offset = (1024*1024*32) + 42
+view_size = (1024*1024*16) + 111
+
+## round mapping size and view size up to multiple of system page size
+if fsize%page_size:
+    fsize += page_size - (fsize%page_size)
+if view_size%page_size:
+    view_size += page_size - (view_size%page_size)
+## round offset down to multiple of allocation granularity
+offset -= offset%alloc_size
+
+m1=None
+m2=None
+try:
+    try:
+        m1=mmapfile.mmapfile(fname_large, mapping_name, fsize, 0, offset*2)
+    except mmapfile.error as exc:
+        # if we don't have enough disk-space, that's OK.
+        if exc.winerror!=winerror.ERROR_DISK_FULL:
+            raise
+        print("skipping large file test - need", fsize, "available bytes.")
+    else:
+        m1.seek(offset)
+        m1.write(offsetdata)
+    
+        ## When reopening an existing mapping without passing a file handle, you have
+        ##  to specify a positive size even though it's ignored
+        m2=mmapfile.mmapfile(File=None, Name=mapping_name, MaximumSize=1,
+            FileOffset=offset, NumberOfBytesToMap=view_size)
+        assert m2.read(len(offsetdata))==offsetdata
+finally:
+    if m1 is not None:
+        m1.close()
+    if m2 is not None:
+        m2.close()
+    if os.path.exists(fname_large):
+        os.remove(fname_large)