bpo-37704: Remove Tools/scripts/h2py.py (GH-15000)
Use cffi to access a C API in Python.
This commit is contained in:
Victor Stinner
GitHub
parent
8a758f5b99
commit
27eeaf0f2c
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@ -2,7 +2,7 @@
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This file contains extremely basic regression tests for the scripts found in
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the Tools directory of a Python checkout or tarball which don't have separate
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tests of their own, such as h2py.py.
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tests of their own.
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"""
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import os
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@ -0,0 +1 @@
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Remove ``Tools/scripts/h2py.py``: use cffi to access a C API in Python.
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@ -30,7 +30,6 @@ ftpmirror.py FTP mirror script
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get-remote-certificate.py Fetch the certificate that the server(s) are providing in PEM form
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google.py Open a webbrowser with Google
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gprof2html.py Transform gprof(1) output into useful HTML
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h2py.py Translate #define's into Python assignments
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highlight.py Python syntax highlighting with HTML output
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idle3 Main program to start IDLE
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ifdef.py Remove #if(n)def groups from C sources
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@ -1,171 +0,0 @@
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#! /usr/bin/env python3
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# Read #define's and translate to Python code.
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# Handle #include statements.
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# Handle #define macros with one argument.
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# Anything that isn't recognized or doesn't translate into valid
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# Python is ignored.
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# Without filename arguments, acts as a filter.
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# If one or more filenames are given, output is written to corresponding
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# filenames in the local directory, translated to all uppercase, with
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# the extension replaced by ".py".
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# By passing one or more options of the form "-i regular_expression"
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# you can specify additional strings to be ignored. This is useful
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# e.g. to ignore casts to u_long: simply specify "-i '(u_long)'".
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# XXX To do:
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# - turn trailing C comments into Python comments
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# - turn C Boolean operators "&& || !" into Python "and or not"
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# - what to do about #if(def)?
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# - what to do about macros with multiple parameters?
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import sys, re, getopt, os
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p_define = re.compile(r'^[\t ]*#[\t ]*define[\t ]+([a-zA-Z0-9_]+)[\t ]+')
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p_macro = re.compile(
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r'^[\t ]*#[\t ]*define[\t ]+'
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r'([a-zA-Z0-9_]+)\(([_a-zA-Z][_a-zA-Z0-9]*)\)[\t ]+')
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p_include = re.compile(r'^[\t ]*#[\t ]*include[\t ]+<([^>\n]+)>')
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p_comment = re.compile(r'/\*([^*]+|\*+[^/])*(\*+/)?')
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p_cpp_comment = re.compile('//.*')
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ignores = [p_comment, p_cpp_comment]
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p_char = re.compile(r"'(\\.[^\\]*|[^\\])'")
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p_hex = re.compile(r"0x([0-9a-fA-F]+)L?")
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filedict = {}
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importable = {}
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try:
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searchdirs=os.environ['include'].split(';')
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except KeyError:
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try:
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searchdirs=os.environ['INCLUDE'].split(';')
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except KeyError:
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searchdirs=['/usr/include']
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try:
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searchdirs.insert(0, os.path.join('/usr/include',
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os.environ['MULTIARCH']))
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except KeyError:
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pass
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def main():
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global filedict
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opts, args = getopt.getopt(sys.argv[1:], 'i:')
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for o, a in opts:
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if o == '-i':
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ignores.append(re.compile(a))
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if not args:
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args = ['-']
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for filename in args:
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if filename == '-':
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sys.stdout.write('# Generated by h2py from stdin\n')
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process(sys.stdin, sys.stdout)
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else:
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with open(filename) as fp:
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outfile = os.path.basename(filename)
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i = outfile.rfind('.')
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if i > 0: outfile = outfile[:i]
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modname = outfile.upper()
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outfile = modname + '.py'
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with open(outfile, 'w') as outfp:
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outfp.write('# Generated by h2py from %s\n' % filename)
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filedict = {}
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for dir in searchdirs:
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if filename[:len(dir)] == dir:
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filedict[filename[len(dir)+1:]] = None # no '/' trailing
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importable[filename[len(dir)+1:]] = modname
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break
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process(fp, outfp)
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def pytify(body):
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# replace ignored patterns by spaces
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for p in ignores:
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body = p.sub(' ', body)
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# replace char literals by ord(...)
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body = p_char.sub("ord('\\1')", body)
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# Compute negative hexadecimal constants
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start = 0
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UMAX = 2*(sys.maxsize+1)
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while 1:
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m = p_hex.search(body, start)
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if not m: break
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s,e = m.span()
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val = int(body[slice(*m.span(1))], 16)
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if val > sys.maxsize:
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val -= UMAX
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body = body[:s] + "(" + str(val) + ")" + body[e:]
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start = s + 1
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return body
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def process(fp, outfp, env = {}):
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lineno = 0
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while 1:
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line = fp.readline()
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if not line: break
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lineno = lineno + 1
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match = p_define.match(line)
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if match:
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# gobble up continuation lines
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while line[-2:] == '\\\n':
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nextline = fp.readline()
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if not nextline: break
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lineno = lineno + 1
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line = line + nextline
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name = match.group(1)
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body = line[match.end():]
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body = pytify(body)
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ok = 0
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stmt = '%s = %s\n' % (name, body.strip())
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try:
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exec(stmt, env)
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except:
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sys.stderr.write('Skipping: %s' % stmt)
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else:
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outfp.write(stmt)
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match = p_macro.match(line)
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if match:
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macro, arg = match.group(1, 2)
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body = line[match.end():]
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body = pytify(body)
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stmt = 'def %s(%s): return %s\n' % (macro, arg, body)
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try:
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exec(stmt, env)
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except:
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sys.stderr.write('Skipping: %s' % stmt)
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else:
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outfp.write(stmt)
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match = p_include.match(line)
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if match:
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regs = match.regs
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a, b = regs[1]
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filename = line[a:b]
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if filename in importable:
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outfp.write('from %s import *\n' % importable[filename])
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elif filename not in filedict:
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filedict[filename] = None
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inclfp = None
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for dir in searchdirs:
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try:
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inclfp = open(dir + '/' + filename)
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break
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except IOError:
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pass
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if inclfp:
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with inclfp:
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outfp.write(
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'\n# Included from %s\n' % filename)
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process(inclfp, outfp, env)
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else:
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sys.stderr.write('Warning - could not find file %s\n' %
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filename)
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if __name__ == '__main__':
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main()
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