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-
- import mmap
- import string, os, re, sys
-
- PAGESIZE = mmap.PAGESIZE
-
- def test_both():
- "Test mmap module on Unix systems and Windows"
-
- # Create an mmap'ed file
- f = open('foo', 'w+')
-
- # Write 2 pages worth of data to the file
- f.write('\0'* PAGESIZE)
- f.write('foo')
- f.write('\0'* (PAGESIZE-3) )
-
- m = mmap.mmap(f.fileno(), 2 * PAGESIZE)
- f.close()
-
- # Simple sanity checks
- print ' Position of foo:', string.find(m, 'foo') / float(PAGESIZE), 'pages'
- assert string.find(m, 'foo') == PAGESIZE
-
- print ' Length of file:', len(m) / float(PAGESIZE), 'pages'
- assert len(m) == 2*PAGESIZE
-
- print ' Contents of byte 0:', repr(m[0])
- assert m[0] == '\0'
- print ' Contents of first 3 bytes:', repr(m[0:3])
- assert m[0:3] == '\0\0\0'
-
- # Modify the file's content
- print "\n Modifying file's content..."
- m[0] = '3'
- m[PAGESIZE +3: PAGESIZE +3+3]='bar'
-
- # Check that the modification worked
- print ' Contents of byte 0:', repr(m[0])
- assert m[0] == '3'
- print ' Contents of first 3 bytes:', repr(m[0:3])
- assert m[0:3] == '3\0\0'
- print ' Contents of second page:', m[PAGESIZE-1 : PAGESIZE + 7]
- assert m[PAGESIZE-1 : PAGESIZE + 7] == '\0foobar\0'
-
- m.flush()
-
- # Test doing a regular expression match in an mmap'ed file
- match=re.search('[A-Za-z]+', m)
- if match == None:
- print ' ERROR: regex match on mmap failed!'
- else:
- start, end = match.span(0)
- length = end - start
-
- print ' Regex match on mmap (page start, length of match):',
- print start / float(PAGESIZE), length
-
- assert start == PAGESIZE
- assert end == PAGESIZE + 6
-
- m.close()
- os.unlink("foo")
- print ' Test passed'
-
- test_both()
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