"""High-perfomance logging profiler, mostly written in C."""

import _hotshot

from _hotshot import ProfilerError

from warnings import warnpy3k as _warnpy3k

_warnpy3k("The 'hotshot' module is not supported in 3.x, "

          "use the 'profile' module instead.", stacklevel=2)

class Profile:

    def __init__(self, logfn, lineevents=0, linetimings=1):

        self.lineevents = lineevents and 1 or 0

        self.linetimings = (linetimings and lineevents) and 1 or 0

        self._prof = p = _hotshot.profiler(

            logfn, self.lineevents, self.linetimings)

        # Attempt to avoid confusing results caused by the presence of

        # Python wrappers around these functions, but only if we can

        # be sure the methods have not been overridden or extended.

        if self.__class__ is Profile:

            self.close = p.close

            self.start = p.start

            self.stop = p.stop

            self.addinfo = p.addinfo

    def close(self):

        """Close the logfile and terminate the profiler."""

        self._prof.close()

    def fileno(self):

        """Return the file descriptor of the profiler's log file."""

        return self._prof.fileno()

    def start(self):

        """Start the profiler."""

        self._prof.start()

    def stop(self):

        """Stop the profiler."""

        self._prof.stop()

    def addinfo(self, key, value):

        """Add an arbitrary labelled value to the profile log."""

        self._prof.addinfo(key, value)

    # These methods offer the same interface as the profile.Profile class,

    # but delegate most of the work to the C implementation underneath.

    def run(self, cmd):

        """Profile an exec-compatible string in the script

        environment.

        The globals from the __main__ module are used as both the

        globals and locals for the script.

        """

        import __main__

        dict = __main__.__dict__

        return self.runctx(cmd, dict, dict)

    def runctx(self, cmd, globals, locals):

        """Evaluate an exec-compatible string in a specific

        environment.

        The string is compiled before profiling begins.

        """

        code = compile(cmd, "<string>", "exec")

        self._prof.runcode(code, globals, locals)

        return self

    def runcall(self, func, *args, **kw):

        """Profile a single call of a callable.

        Additional positional and keyword arguments may be passed

        along; the result of the call is returned, and exceptions are

        allowed to propogate cleanly, while ensuring that profiling is

        disabled on the way out.

        """

        return self._prof.runcall(func, args, kw)