Rearranged files and beautified code

This commit is contained in:
2021-05-03 00:45:54 +03:00
parent a228f94dd0
commit 31d5b1c0f2
8 changed files with 341 additions and 310 deletions
+161 -162
View File
@@ -1,190 +1,189 @@
from os.path import dirname,basename,join,abspath as path
from os.path import dirname, basename, join, abspath as path
from time import time
from datetime import datetime as dt
import click
class Log:
def __init__(self,path,name):
self.path=path
self.name=name
def __init__(self, path, name):
self.path = path
self.name = name
def log(self,msg,name=None):
if name is None:
name=self.name
now=dt.today()
with open(self.path,'a',encoding='utf-8') as file:
file.write(f'{now.year}-{str(now.month).rjust(2,"0")}-{str(now.day).rjust(2,"0")} '
f'{str(now.hour).rjust(2,"0")}:{str(now.minute).rjust(2,"0")}:{str(now.second).rjust(2,"0")},{str(now.microsecond)[:3]}'
' | '
f'{name}'
' | '
f'{msg}\n')
def log(self, msg, name=None):
if name is None:
name = self.name
now = dt.today()
with open(self.path, 'a', encoding='utf-8') as file:
file.write(f'{now.year}-{str(now.month).rjust(2, "0")}-{str(now.day).rjust(2, "0")} '
f'{str(now.hour).rjust(2, "0")}:{str(now.minute).rjust(2, "0")}:{str(now.second).rjust(2, "0")},{str(now.microsecond)[:3]}'
' | '
f'{name}'
' | '
f'{msg}\n')
log=Log(join(dirname(__file__),'hfm.log'),'hfm-py')
log = Log(join(dirname(__file__), 'hfm.log'), 'hfm-py')
def huffman(data):
units={} #getting element-wise info
for c in data:
if c in units:
units[c]+=1
else:
units[c]=1
units,codes=sorted([([u],units[u]) for u in units],key=lambda u:u[1]),dict.fromkeys(units.keys(),'')
while units: #creating Haffman table
if len(units)>2:
b=int(units[0][1]+units[1][1]>units[1][1]+units[2][1])
else:
b=0
for c in units[b][0]:
codes[c]='0'+codes[c]
for c in units[1+b][0]:
codes[c]='1'+codes[c]
units[2*b]=units[b][0]+units[1+b][0],units[b][1]+units[1+b][1]
if len(units)>2:
del units[1]
units.sort(key=lambda u:u[1])
else:
del units
break
return codes
units = {} # getting element-wise info
for c in data:
if c in units:
units[c] += 1
else:
units[c] = 1
units, codes = sorted([([u], units[u]) for u in units], key=lambda u: u[1]), dict.fromkeys(units.keys(), '')
while units: # creating Haffman table
if len(units) > 2:
b = int(units[0][1] + units[1][1] > units[1][1] + units[2][1])
else:
b = 0
for c in units[b][0]:
codes[c] = '0' + codes[c]
for c in units[1 + b][0]:
codes[c] = '1' + codes[c]
units[2 * b] = units[b][0] + units[1 + b][0], units[b][1] + units[1 + b][1]
if len(units) > 2:
del units[1]
units.sort(key=lambda u: u[1])
else:
del units
break
return codes
def tbl(table):
table=';'.join([f'{k};{table[k]}' for k in table]).split(';')
byts=[]
for i in range(len(table)):
if i%2:
num=table[i]
else:
num=bin(int(table[i]))[2:]
while len(num)>7:
byts.append(int('1'+num[:7],2))
num=num[7:]
byts.append(int(num,2))
byts.append(8-len(num))
return byts
table = ';'.join([f'{k};{table[k]}' for k in table]).split(';')
byts = []
for i in range(len(table)):
if i % 2:
num = table[i]
else:
num = bin(int(table[i]))[2:]
while len(num) > 7:
byts.append(int('1' + num[:7], 2))
num = num[7:]
byts.append(int(num, 2))
byts.append(8 - len(num))
return byts
def detbl(byts):
dec=[]
table={}
stack=''
i=0
while i<len(byts):
if byts[i][0]=='1':
stack+=byts[i][1:]
else:
stack+=byts[i][int(byts[i+1],2):]
dec.append(stack[:])
stack=''
i+=1
i+=1
for i in range(0,len(dec),2):
table[dec[i+1]]=int(dec[i],2)
return table
dec = []
table = {}
stack = ''
i = 0
while i < len(byts):
if byts[i][0] == '1':
stack += byts[i][1:]
else:
stack += byts[i][int(byts[i + 1], 2):]
dec.append(stack[:])
stack = ''
i += 1
i += 1
for i in range(0, len(dec), 2):
table[dec[i + 1]] = int(dec[i], 2)
return table
def compress_file(filename):
log.log(f"Loading '{filename}'...")
with open(filename,'rb') as file: #get data
data=list(map(int,file.read()))
log.log(f'Original size: {len(data)} bytes.')
log.log('Creating Huffman table...')
hf=huffman(data)
table=tbl(hf)
log.log('Embedding Huffman table...')
out=[]
ln=bin(len(table))[2:] #embed the table
while len(ln)>7:
out.append(int('1'+ln[:7],2))
ln=ln[7:]
out+=[int(ln,2),8-len(ln)]+table
log.log(f'Huffman table size: {len(out)} bytes.')
log.log('Compressing...')
stack=''
for i in range(len(data)): #encode to Haffman
stack+=hf[data[i]]
while len(stack)>=8:
out.append(int(stack[:8],2))
stack=stack[8:]
out+=[int(stack.ljust(8,'0'),2),len(stack)]
log.log(f'Compressed size: {len(out)} bytes.')
log.log(f"Saving to '{filename}.hfm'...")
with open(f'{filename}.hfm','wb') as file: #save Haffman code
file.write(bytes(out))
log.log('SUCCESSFULLY COMPRESSED')
print(f'"origSize":{len(data)},')
print(f'"compSize":{len(out)},')
log.log(f"Loading '{filename}'...")
with open(filename, 'rb') as file: # get data
data = list(map(int, file.read()))
log.log(f'Original size: {len(data)} bytes.')
log.log('Creating Huffman table...')
hf = huffman(data)
table = tbl(hf)
log.log('Embedding Huffman table...')
out = []
ln = bin(len(table))[2:] # embed the table
while len(ln) > 7:
out.append(int('1' + ln[:7], 2))
ln = ln[7:]
out += [int(ln, 2), 8 - len(ln)] + table
log.log(f'Huffman table size: {len(out)} bytes.')
log.log('Compressing...')
stack = ''
for i in range(len(data)): # encode to Haffman
stack += hf[data[i]]
while len(stack) >= 8:
out.append(int(stack[:8], 2))
stack = stack[8:]
out += [int(stack.ljust(8, '0'), 2), len(stack)]
log.log(f'Compressed size: {len(out)} bytes.')
log.log(f"Saving to '{filename}.hfm'...")
with open(f'{filename}.hfm', 'wb') as file: # save Haffman code
file.write(bytes(out))
log.log('SUCCESSFULLY COMPRESSED')
print(f'"origSize":{len(data)},')
print(f'"compSize":{len(out)},')
def decompress_file(filename):
log.log(f"Loading '{filename}'...")
with open(filename,'rb') as file: #get data
data=[bin(byte)[2:].rjust(8,'0')for byte in file.read()]
os=len(data)
data[-2]=data[-2][:int(data[-1],2)]
del data[-1]
log.log('Extracting Huffman table...')
ln='' #extract the table
i=0
while 1:
if data[i][0]=='1':
ln+=data[i][1:]
else:
ln+=data[i][int(data[i+1],2):]
break
i+=1
del data[:i+2]
table=detbl(data[:int(ln,2)])
del data[:int(ln,2)]
data=''.join(data)
stack=''
out=[]
log.log('Decompressing...')
for c in data: #decode Haffman
stack+=c
if stack in table:
out.append(int(table[stack]))
stack=''
filename=filename[:-4]
log.log(f"Saving to '{filename}'...")
with open(f'{filename}','wb') as file: #save decoded data
file.write(bytes(out))
log.log(f'SUCCESSFULLY DECOMPRESSED')
print(f'"compSize":{os},')
print(f'"origSize":{len(out)},')
log.log(f"Loading '{filename}'...")
with open(filename, 'rb') as file: # get data
data = [bin(byte)[2:].rjust(8, '0') for byte in file.read()]
os = len(data)
data[-2] = data[-2][:int(data[-1], 2)]
del data[-1]
log.log('Extracting Huffman table...')
ln = '' # extract the table
i = 0
while 1:
if data[i][0] == '1':
ln += data[i][1:]
else:
ln += data[i][int(data[i + 1], 2):]
break
i += 1
del data[:i + 2]
table = detbl(data[:int(ln, 2)])
del data[:int(ln, 2)]
data = ''.join(data)
stack = ''
out = []
log.log('Decompressing...')
for c in data: # decode Haffman
stack += c
if stack in table:
out.append(int(table[stack]))
stack = ''
filename = filename[:-4]
log.log(f"Saving to '{filename}'...")
with open(f'{filename}', 'wb') as file: # save decoded data
file.write(bytes(out))
log.log(f'SUCCESSFULLY DECOMPRESSED')
print(f'"compSize":{os},')
print(f'"origSize":{len(out)},')
@click.command(options_metavar='[-c / -d]')
@click.argument('files',nargs=-1,metavar='<file [file [...]]>')
@click.option('-c/-d','comp',default=True,help='Compress/decompress mode selectors.')
def CLI(files,comp):
log.log(f'hfm {"-c"*comp}{"-d"*(not comp)} {" ".join(files)}')
for file in files:
print('{')
stime=time()
if comp:
compress_file(path(file))
wtime=time()-stime
print('"status":true,')
print(f'"time":{round(wtime,3)},')
print(f'"dlink":"./files/{basename(file)+".hfm"}"')
else:
try:
decompress_file(path(file))
wtime=time()-stime
print('"status":true,')
print(f'"time":{round(wtime,3)},')
print(f'"dlink":"./files/{basename(file)[:-4]}"')
except Exception as e:
print(f'"status":false')
print('}')
@click.argument('files', nargs=-1, metavar='<file [file [...]]>')
@click.option('-c/-d', 'comp', default=True, help='Compress/decompress mode selectors.')
def CLI(files, comp):
log.log(f'hfm {"-c" * comp}{"-d" * (not comp)} {" ".join(files)}')
for file in files:
print('{')
stime = time()
if comp:
compress_file(path(file))
wtime = time() - stime
print('"status":true,')
print(f'"time":{round(wtime, 3)},')
print(f'"dlink":"./files/{basename(file) + ".hfm"}"')
else:
try:
decompress_file(path(file))
wtime = time() - stime
print('"status":true,')
print(f'"time":{round(wtime, 3)},')
print(f'"dlink":"./files/{basename(file)[:-4]}"')
except Exception as e:
print(f'"status":false')
print('}')
if __name__=='__main__':
CLI()
if __name__ == '__main__':
CLI()