Compare what's read from files against proper byte literals. Neither of these
modules have unittests AFAICT, and I'm not improving things here, but these changes make a bunch of email package tests succeed, and command line testing against real files seems to make things better. Added an __main__ section to imghdr.py so that it can be run from the command line similarly to sndhdr.py. Someone else can figure out a better -m way of doing this. In sndhdr.py do a couple of very minor cleanups, and use a with statement to not wait for gc to close the file.
This commit is contained in:
Barry Warsaw
parent
46fc337395
commit
72937f3216
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@ -36,14 +36,14 @@ tests = []
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def test_rgb(h, f):
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"""SGI image library"""
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if h[:2] == '\001\332':
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if h[:2] == b'\001\332':
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return 'rgb'
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tests.append(test_rgb)
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def test_gif(h, f):
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"""GIF ('87 and '89 variants)"""
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if h[:6] in ('GIF87a', 'GIF89a'):
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if h[:6] in (b'GIF87a', b'GIF89a'):
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return 'gif'
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tests.append(test_gif)
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@ -51,7 +51,7 @@ tests.append(test_gif)
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def test_pbm(h, f):
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"""PBM (portable bitmap)"""
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if len(h) >= 3 and \
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h[0] == 'P' and h[1] in '14' and h[2] in ' \t\n\r':
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h[0] == ord('P') and h[1] in b'14' and h[2] in b' \t\n\r':
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return 'pbm'
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tests.append(test_pbm)
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@ -59,7 +59,7 @@ tests.append(test_pbm)
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def test_pgm(h, f):
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"""PGM (portable graymap)"""
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if len(h) >= 3 and \
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h[0] == 'P' and h[1] in '25' and h[2] in ' \t\n\r':
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h[0] == ord('P') and h[1] in b'25' and h[2] in b' \t\n\r':
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return 'pgm'
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tests.append(test_pgm)
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@ -67,28 +67,28 @@ tests.append(test_pgm)
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def test_ppm(h, f):
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"""PPM (portable pixmap)"""
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if len(h) >= 3 and \
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h[0] == 'P' and h[1] in '36' and h[2] in ' \t\n\r':
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h[0] == ord('P') and h[1] in b'36' and h[2] in b' \t\n\r':
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return 'ppm'
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tests.append(test_ppm)
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def test_tiff(h, f):
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"""TIFF (can be in Motorola or Intel byte order)"""
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if h[:2] in ('MM', 'II'):
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if h[:2] in (b'MM', b'II'):
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return 'tiff'
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tests.append(test_tiff)
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def test_rast(h, f):
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"""Sun raster file"""
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if h[:4] == '\x59\xA6\x6A\x95':
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if h[:4] == b'\x59\xA6\x6A\x95':
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return 'rast'
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tests.append(test_rast)
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def test_xbm(h, f):
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"""X bitmap (X10 or X11)"""
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s = '#define '
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s = b'#define '
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if h[:len(s)] == s:
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return 'xbm'
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@ -96,26 +96,26 @@ tests.append(test_xbm)
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def test_jpeg(h, f):
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"""JPEG data in JFIF format"""
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if h[6:10] == 'JFIF':
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if h[6:10] == b'JFIF':
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return 'jpeg'
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tests.append(test_jpeg)
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def test_exif(h, f):
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"""JPEG data in Exif format"""
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if h[6:10] == 'Exif':
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if h[6:10] == b'Exif':
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return 'jpeg'
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tests.append(test_exif)
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def test_bmp(h, f):
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if h[:2] == 'BM':
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if h[:2] == b'BM':
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return 'bmp'
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tests.append(test_bmp)
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def test_png(h, f):
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if h[:8] == "\211PNG\r\n\032\n":
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if h[:8] == b'\211PNG\r\n\032\n':
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return 'png'
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tests.append(test_png)
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@ -159,3 +159,6 @@ def testall(list, recursive, toplevel):
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print(what(filename))
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except IOError:
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print('*** not found ***')
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if __name__ == '__main__':
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test()
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@ -30,23 +30,23 @@ explicitly given directories.
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# The file structure is top-down except that the test program and its
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# subroutine come last.
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__all__ = ["what","whathdr"]
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__all__ = ['what', 'whathdr']
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def what(filename):
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"""Guess the type of a sound file"""
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"""Guess the type of a sound file."""
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res = whathdr(filename)
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return res
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def whathdr(filename):
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"""Recognize sound headers"""
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f = open(filename, 'rb')
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h = f.read(512)
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for tf in tests:
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res = tf(h, f)
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if res:
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return res
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return None
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"""Recognize sound headers."""
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with open(filename, 'rb') as f:
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h = f.read(512)
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for tf in tests:
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res = tf(h, f)
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if res:
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return res
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return None
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#-----------------------------------#
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@ -57,12 +57,12 @@ tests = []
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def test_aifc(h, f):
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import aifc
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if h[:4] != 'FORM':
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if h[:4] != b'FORM':
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return None
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if h[8:12] == 'AIFC':
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if h[8:12] == b'AIFC':
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fmt = 'aifc'
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elif h[8:12] == 'AIFF':
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fmt = 'aiff'
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elif h[8:12] == b'AIFF':
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fmt = b'aiff'
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else:
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return None
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f.seek(0)
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@ -70,25 +70,25 @@ def test_aifc(h, f):
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a = aifc.openfp(f, 'r')
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except (EOFError, aifc.Error):
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return None
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return (fmt, a.getframerate(), a.getnchannels(), \
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a.getnframes(), 8*a.getsampwidth())
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return (fmt, a.getframerate(), a.getnchannels(),
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a.getnframes(), 8 * a.getsampwidth())
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tests.append(test_aifc)
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def test_au(h, f):
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if h[:4] == '.snd':
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f = get_long_be
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elif h[:4] in ('\0ds.', 'dns.'):
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f = get_long_le
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if h[:4] == b'.snd':
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func = get_long_be
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elif h[:4] in (b'\0ds.', b'dns.'):
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func = get_long_le
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else:
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return None
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type = 'au'
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hdr_size = f(h[4:8])
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data_size = f(h[8:12])
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encoding = f(h[12:16])
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rate = f(h[16:20])
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nchannels = f(h[20:24])
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filetype = 'au'
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hdr_size = func(h[4:8])
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data_size = func(h[8:12])
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encoding = func(h[12:16])
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rate = func(h[16:20])
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nchannels = func(h[20:24])
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sample_size = 1 # default
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if encoding == 1:
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sample_bits = 'U'
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@ -100,26 +100,26 @@ def test_au(h, f):
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else:
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sample_bits = '?'
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frame_size = sample_size * nchannels
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return type, rate, nchannels, data_size/frame_size, sample_bits
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return filetype, rate, nchannels, data_size / frame_size, sample_bits
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tests.append(test_au)
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def test_hcom(h, f):
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if h[65:69] != 'FSSD' or h[128:132] != 'HCOM':
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if h[65:69] != b'FSSD' or h[128:132] != b'HCOM':
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return None
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divisor = get_long_be(h[128+16:128+20])
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return 'hcom', 22050/divisor, 1, -1, 8
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return 'hcom', 22050 / divisor, 1, -1, 8
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tests.append(test_hcom)
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def test_voc(h, f):
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if h[:20] != 'Creative Voice File\032':
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if h[:20] != b'Creative Voice File\032':
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return None
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sbseek = get_short_le(h[20:22])
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rate = 0
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if 0 <= sbseek < 500 and h[sbseek] == '\1':
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if 0 <= sbseek < 500 and h[sbseek] == b'\1':
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ratecode = ord(h[sbseek+4])
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rate = int(1000000.0 / (256 - ratecode))
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return 'voc', rate, 1, -1, 8
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@ -129,7 +129,7 @@ tests.append(test_voc)
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def test_wav(h, f):
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# 'RIFF' <len> 'WAVE' 'fmt ' <len>
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if h[:4] != 'RIFF' or h[8:12] != 'WAVE' or h[12:16] != 'fmt ':
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if h[:4] != b'RIFF' or h[8:12] != b'WAVE' or h[12:16] != b'fmt ':
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return None
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style = get_short_le(h[20:22])
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nchannels = get_short_le(h[22:24])
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@ -141,7 +141,7 @@ tests.append(test_wav)
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def test_8svx(h, f):
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if h[:4] != 'FORM' or h[8:12] != '8SVX':
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if h[:4] != b'FORM' or h[8:12] != b'8SVX':
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return None
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# Should decode it to get #channels -- assume always 1
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return '8svx', 0, 1, 0, 8
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@ -150,7 +150,7 @@ tests.append(test_8svx)
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def test_sndt(h, f):
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if h[:5] == 'SOUND':
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if h[:5] == b'SOUND':
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nsamples = get_long_le(h[8:12])
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rate = get_short_le(h[20:22])
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return 'sndt', rate, 1, nsamples, 8
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@ -159,7 +159,7 @@ tests.append(test_sndt)
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def test_sndr(h, f):
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if h[:2] == '\0\0':
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if h[:2] == b'\0\0':
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rate = get_short_le(h[2:4])
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if 4000 <= rate <= 25000:
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return 'sndr', rate, 1, -1, 8
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@ -167,21 +167,21 @@ def test_sndr(h, f):
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tests.append(test_sndr)
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#---------------------------------------------#
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# Subroutines to extract numbers from strings #
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#---------------------------------------------#
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#-------------------------------------------#
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# Subroutines to extract numbers from bytes #
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#-------------------------------------------#
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def get_long_be(s):
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return (ord(s[0])<<24) | (ord(s[1])<<16) | (ord(s[2])<<8) | ord(s[3])
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def get_long_be(b):
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return (b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3]
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def get_long_le(s):
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return (ord(s[3])<<24) | (ord(s[2])<<16) | (ord(s[1])<<8) | ord(s[0])
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def get_long_le(b):
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return (b[3] << 24) | (b[2] << 16) | (b[1] << 8) | b[0]
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def get_short_be(s):
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return (ord(s[0])<<8) | ord(s[1])
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def get_short_be(b):
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return (b[0] << 8) | b[1]
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def get_short_le(s):
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return (ord(s[1])<<8) | ord(s[0])
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def get_short_le(b):
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return (b[1] << 8) | b[0]
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#--------------------#
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