diff options
Diffstat (limited to 'Demo/zlib')
| -rwxr-xr-x | Demo/zlib/minigzip.py | 15 | ||||
| -rwxr-xr-x | Demo/zlib/zlibdemo.py | 5 |
2 files changed, 9 insertions, 11 deletions
diff --git a/Demo/zlib/minigzip.py b/Demo/zlib/minigzip.py index dc99d9b..e2801de 100755 --- a/Demo/zlib/minigzip.py +++ b/Demo/zlib/minigzip.py @@ -9,7 +9,7 @@ def write32(output, value): output.write(chr(value & 255)) ; value=value / 256 output.write(chr(value & 255)) ; value=value / 256 output.write(chr(value & 255)) - + def read32(input): v=ord(input.read(1)) v=v+ (ord(input.read(1))<<8 ) @@ -19,9 +19,9 @@ def read32(input): import zlib, sys if len(sys.argv)!=2: - print 'Usage: minigzip.py <filename>' - print ' The file will be compressed or decompressed.' - sys.exit(0) + print 'Usage: minigzip.py <filename>' + print ' The file will be compressed or decompressed.' + sys.exit(0) filename=sys.argv[1] compressing=1 ; outputname=filename+'.gz' @@ -64,7 +64,7 @@ else: # extra flags, and OS byte. if flag & FEXTRA: # Read & discard the extra field, if present - xlen=ord(input.read(1)) + xlen=ord(input.read(1)) xlen=xlen+256*ord(input.read(1)) input.read(xlen) if flag & FNAME: @@ -92,11 +92,11 @@ else: decompdata=decompobj.flush() output.write(decompdata) ; length=length+len(decompdata) crcval=zlib.crc32(decompdata, crcval) - + # We've read to the end of the file, so we have to rewind in order # to reread the 8 bytes containing the CRC and the file size. The # decompressor is smart and knows when to stop, so feeding it - # extra data is harmless. + # extra data is harmless. input.seek(-8, 2) crc32=read32(input) isize=read32(input) @@ -104,4 +104,3 @@ else: if isize!=length: print 'Incorrect length of data produced' input.close() ; output.close() - diff --git a/Demo/zlib/zlibdemo.py b/Demo/zlib/zlibdemo.py index 7c56e3e..5a0ab63 100755 --- a/Demo/zlib/zlibdemo.py +++ b/Demo/zlib/zlibdemo.py @@ -4,7 +4,7 @@ import zlib, sys if len(sys.argv)>1: filename=sys.argv[1] else: filename='zlibdemo.py' print 'Reading', filename -f=open(filename, 'r') # Get the data to compress +f=open(filename, 'r') # Get the data to compress s=f.read() f.close() @@ -24,7 +24,7 @@ decompressor=zlib.decompressobj() comptext=decomp='' for i in range(0, len(s), chunk): comptext=comptext+compressor.compress(s[i:i+chunk]) -comptext=comptext+compressor.flush() # Don't forget to call flush()!! +comptext=comptext+compressor.flush() # Don't forget to call flush()!! for i in range(0, len(comptext), chunk): decomp=decomp+decompressor.decompress(comptext[i:i+chunk]) @@ -33,4 +33,3 @@ decomp=decomp+decompressor.flush() print 'Progressive compression (level 9):' print ' Original:', len(s), 'Compressed:', len(comptext), print 'Uncompressed:', len(decomp) - |