120 lines
3.0 KiB
Python
120 lines
3.0 KiB
Python
#!/usr/bin/env python
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"""This script searches files for functions that are just aliases in
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PHP source code. This is not 100% reliable, so it should not be
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automated, but it's useful to run once in a while to make sure that
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all of the matches it finds are not really legitimate aliases.
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Usage:
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parse_aliases.py <name of alias file> [PHP source code filename]...
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"""
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import sys
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# Fetch this URL to get the file that is parsed into the aliases list
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alias_url = 'http://www.zend.com/phpfunc/all_aliases.php'
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header_tok = '<!-- END OF HEADER -->';
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footer_tok = '<!-- FOOTER -->';
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# Example line of the table that we parse:
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# '<tr bgcolor="#EFEFFF"><td><a href="function.bzclose.php">bzclose</a></td><td><a href="http://lxr.php.net/source/php-src/ext/bz2/bz2.c#48">php-src/ext/bz2/bz2.c</a></td><td><a href="function.fclose.php">fclose</a></td></tr>'
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import re
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line_re = re.compile(r'''
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\A
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<tr\ bgcolor="[^">]+">
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<td><a\ href="[^>"]+\.php">([^<>]+)</a></td>
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<td><a\ href="[^">]+">[^<>]+</a></td>
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<td>
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(?:
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<a\ href="[^">]+\.php">
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( [^<>]+ )
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</a>
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| ( [^<>]+ )
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)
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</td>
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</tr>
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\Z
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''', re.VERBOSE)
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def parseString(s):
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_, rest = s.split(header_tok, 1)
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body, _ = rest.split(footer_tok, 1)
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lines = body.split('\n')
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assert [s.strip() for s in lines[-2:]] == ['</table>', '']
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assert lines[0].strip().startswith('<table')
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del lines[0], lines[-2:]
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aliases = {}
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for line in lines:
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mo = line_re.match(line)
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assert mo, line
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alias, master1, master2 = mo.groups()
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if master1:
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master = master1
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else:
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assert master2
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master = master2
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aliases[alias] = master
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return aliases
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def parseFile(f):
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return parseString(f.read())
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def parseFileName(fn):
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return parseFile(file(fn, 'r'))
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def parseURL(url):
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return parseFile(urllib2.urlopen(url))
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def getAliasRE(aliases):
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return re.compile(r'(->|\$|)\s*\b(%s)\b' % ('|'.join(aliases.keys())))
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def checkAliasesFile(alias_re, f):
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found = []
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line_num = 1
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for line in f:
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for mo in alias_re.finditer(line):
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if mo.group(1):
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continue
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alias = mo.group(2)
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found.append((line_num, alias))
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line_num += 1
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return found
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def checkAliases(alias_re, filename):
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return checkAliasesFile(alias_re, file(filename, 'r'))
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def checkAliasesFiles(alias_re, filenames):
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found = []
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for filename in filenames:
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file_found = checkAliases(alias_re, filename)
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found.extend([(filename, n, a) for (n, a) in file_found])
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return found
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def dumpResults(aliases, found, out=sys.stdout):
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for filename, n, a in found:
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print >>out, "%s:%d %s -> %s" % (filename, n, a, aliases[a])
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def main(alias_file, *filenames):
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aliases = parseFileName(alias_file)
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alias_re = getAliasRE(aliases)
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found = checkAliasesFiles(alias_re, filenames)
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dumpResults(aliases, found)
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return found
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if __name__ == '__main__':
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found = main(*sys.argv[1:])
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if found:
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sys.exit(1)
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