Decompile .cpp

[Yaidel Ferrales]

Hello, I want to convert a .cpp file generated using cython into the original .pyx. Do you know any tool I can use to do that?

Thanks in advance.

[Robert Bradshaw]

Actually converting the C/C++ code back into pyx would be difficult, and wouldn't likely yield very pythonic (let alone the original) source. However, you could probably extract a lot from the comments, e.g.

from collections import defaultdict

import re

import sys

all = defaultdict(dict)

for line in sys.stdin:

    m = re.match(r'/\* "(.*\.pyx)":(\d+)', line)

    if m:

        file = m.group(1)

        lineno = int(m.group(2)) - 2

    elif '*/' in line:

        lineno = None

    elif lineno is not None:

        all[file][lineno] = line[2:].rstrip()

        lineno += 1

for file, lines in all.items():

    print '=' * 20, file, '=' * 20

    for lineno, line in sorted(lines.items()):

        print lineno, ':', line

On Sat, Aug 1, 2015 at 2:34 AM, Yaidel Ferrales <yaidelf...@gmail.com> wrote:

Hello, I want to convert a .cpp file generated using cython into the original .pyx. Do you know any tool I can use to do that?

Thanks in advance.

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[Robert Bradshaw]

Fixed the regex, try

from collections import defaultdict

import re

import sys

all = defaultdict(dict)

lineno = None

for line in sys.stdin:

    m = re.match(r' */\* "(.*\.pyx)":(\d+)', line)

    if m:

        file = m.group(1)

        lineno = int(m.group(2)) - 2

        print "found", m.groups()

    elif '*/' in line:

        lineno = None

    elif lineno is not None:

        all[file][lineno] = line[2:].rstrip()

        lineno += 1

for file, lines in all.items():

    print '=' * 20, file, '=' * 20

    for lineno, line in sorted(lines.items()):

        print lineno, ':', line

https://gist.github.com/robertwb/03998f22f3792ad7b993

[Stefan Behnel]

Robert Bradshaw schrieb am 01.08.2015 um 20:35:

> On Sat, Aug 1, 2015 at 2:34 AM, Yaidel Ferrales wrote:
>> Hello, I want to convert a .cpp file generated using cython into the
>> original .pyx. Do you know any tool I can use to do that?
>

> Actually converting the C/C++ code back into pyx would be difficult, and
> wouldn't likely yield very pythonic (let alone the original) source.
> However, you could probably extract a lot from the comments, e.g.

> [...]

Also see the coverage analysis plugin in Cython/Coverage.py which does this.

Stefan