source: trunk/essentials/dev-lang/python/Doc/tools/refcounts.py@ 3315

"""Support functions for loading the reference count data file."""
__version__ = '$Revision: 35267 $'

import os
import sys


# Determine the expected location of the reference count file:
try:
    p = os.path.dirname(__file__)
except NameError:
    p = os.path.dirname(sys.argv[0])
p = os.path.normpath(os.path.join(os.getcwd(), p, os.pardir,
                                  "api", "refcounts.dat"))
DEFAULT_PATH = p
del p


def load(path=DEFAULT_PATH):
    return loadfile(open(path))


def loadfile(fp):
    d = {}
    while 1:
        line = fp.readline()
        if not line:
            break
        line = line.strip()
        if line[:1] in ("", "#"):
            # blank lines and comments
            continue
        parts = line.split(":", 4)
        if len(parts) != 5:
            raise ValueError("Not enough fields in %r" % line)
        function, type, arg, refcount, comment = parts
        if refcount == "null":
            refcount = None
        elif refcount:
            refcount = int(refcount)
        else:
            refcount = None
        #
        # Get the entry, creating it if needed:
        #
        try:
            entry = d[function]
        except KeyError:
            entry = d[function] = Entry(function)
        #
        # Update the entry with the new parameter or the result information.
        #
        if arg:
            entry.args.append((arg, type, refcount))
        else:
            entry.result_type = type