mirror of https://github.com/python/cpython
87 lines
2.4 KiB
Python
Executable File
87 lines
2.4 KiB
Python
Executable File
#! /usr/local/bin/python
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# Read #define's from stdin and translate to Python code on stdout.
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# Very primitive: non-#define's are ignored, as is anything that isn't
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# valid Python as it stands.
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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 string quotes 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 #include?
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# - what to do about macros with parameters?
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# - reject definitions with semicolons in them
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import sys, regex, string, getopt, os
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p_define = regex.compile('^#[\t ]*define[\t ]+\([a-zA-Z0-9_]+\)[\t ]+')
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p_comment = regex.compile('/\*\([^*]+\|\*+[^/]\)*\(\*+/\)?')
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ignores = [p_comment]
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def main():
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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(regex.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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fp = open(filename, 'r')
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outfile = os.path.basename(filename)
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i = string.rfind(outfile, '.')
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if i > 0: outfile = outfile[:i]
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outfile = string.upper(outfile)
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outfile = outfile + '.py'
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outfp = open(outfile, 'w')
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outfp.write('# Generated by h2py from %s\n' % filename)
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process(fp, outfp)
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outfp.close()
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fp.close()
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def process(fp, outfp):
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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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# 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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n = p_define.match(line)
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if n >= 0:
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name = p_define.group(1)
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body = line[n:]
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# replace ignored patterns by spaces
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for p in ignores:
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while p.search(body) >= 0:
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a, b = p.regs[0]
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body = body[:a] + ' ' + body[b:]
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stmt = '%s = %s\n' % (name, string.strip(body))
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ok = 0
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try:
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exec stmt in env
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ok = 1
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except:
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sys.stderr.write('Skipping: %s' % stmt)
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if ok:
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outfp.write(stmt)
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main()
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