ASCII art diagram converter: Difference between revisions

=={{header|Python}}==

<lang python>

"""

http://rosettacode.org/wiki/ASCII_art_diagram_converter

Python example based off Go example:

http://rosettacode.org/wiki/ASCII_art_diagram_converter#Go

"""

def validate(diagram):

# trim empty lines

rawlines = diagram.splitlines()

lines = []

for line in rawlines:

if line != '':

lines.append(line)

# validate non-empty lines

if len(lines) == 0:

print('diagram has no non-empty lines!')

return None

width = len(lines[0])

cols = (width - 1) // 3

if cols not in [8, 16, 32, 64]:

print('number of columns should be 8, 16, 32 or 64')

return None

if len(lines)%2 == 0:

print('number of non-empty lines should be odd')

return None

if lines[0] != (('+--' * cols)+'+'):

print('incorrect header line')

return None

for i in range(len(lines)):

line=lines[i]

if i == 0:

continue

elif i%2 == 0:

if line != lines[0]:

print('incorrect separator line')

return None

elif len(line) != width:

print('inconsistent line widths')

return None

elif line[0] != '|' or line[width-1] != '|':

print("non-separator lines must begin and end with '|'")

return None

return lines

"""

results is list of lists like:

[[name, bits, start, end],...

"""

def decode(lines):

print("Name Bits Start End")

print("======= ==== ===== ===")

startbit = 0

results = []

for line in lines:

infield=False

for c in line:

if not infield and c == '|':

infield = True

spaces = 0

name = ''

elif infield:

if c == ' ':

spaces += 1

elif c != '|':

name += c

else:

bits = (spaces + len(name) + 1) // 3

endbit = startbit + bits - 1

print('{0:7} {1:2d} {2:2d} {3:2d}'.format(name, bits, startbit, endbit))

reslist = [name, bits, startbit, endbit]

results.append(reslist)

spaces = 0

name = ''

startbit += bits

return results

def unpack(results, hex):

print("\nTest string in hex:")

print(hex)

print("\nTest string in binary:")

bin = f'{int(hex, 16):0>{4*len(hex)}b}'

print(bin)

print("\nUnpacked:\n")

print("Name Size Bit pattern")

print("======= ==== ================")

for r in results:

name = r[0]

size = r[1]

startbit = r[2]

endbit = r[3]

bitpattern = bin[startbit:endbit+1]

print('{0:7} {1:2d} {2:16}'.format(name, size, bitpattern))

diagram = """

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| ID |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

|QR| Opcode |AA|TC|RD|RA| Z | RCODE |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| QDCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| ANCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| NSCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| ARCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

"""

lines = validate(diagram)

if lines == None:

print("No lines returned")

else:

print(" ")

print("Diagram after trimming whitespace and removal of blank lines:")

print(" ")

for line in lines:

print(line)

print(" ")

print("Decoded:")

print(" ")

results = decode(lines)

# test string

hex = "78477bbf5496e12e1bf169a4"

unpack(results, hex)

</lang>

{{out}}

<pre>

Diagram after trimming whitespace and removal of blank lines:

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| ID |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

|QR| Opcode |AA|TC|RD|RA| Z | RCODE |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| QDCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| ANCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| NSCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

| ARCOUNT |

+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+

Decoded:

Name Bits Start End

======= ==== ===== ===

ID 16 0 15

QR 1 16 16

Opcode 4 17 20

AA 1 21 21

TC 1 22 22

RD 1 23 23

RA 1 24 24

Z 3 25 27

RCODE 4 28 31

QDCOUNT 16 32 47

ANCOUNT 16 48 63

NSCOUNT 16 64 79

ARCOUNT 16 80 95

Test string in hex:

78477bbf5496e12e1bf169a4

Test string in binary:

011110000100011101111011101111110101010010010110111000010010111000011011111100010110100110100100

Unpacked:

Name Size Bit pattern

======= ==== ================

ID 16 0111100001000111

QR 1 0

Opcode 4 1111

AA 1 0

TC 1 1

RD 1 1

RA 1 1

Z 3 011

RCODE 4 1111

QDCOUNT 16 0101010010010110

ANCOUNT 16 1110000100101110

NSCOUNT 16 0001101111110001

ARCOUNT 16 0110100110100100

</pre>