A small Sublime Text 2 plugin for C/C++ developers. It opens for you a header file for the current file and vice versa.

Chelp.py

import os
import sublime_plugin


class ChelpCommand(sublime_plugin.WindowCommand):

    ALLOWED_EXT = (".c", ".h")

    def swap_extension(self, current_extension):
        if current_extension == ".c":
            return "h"
        return "c"

    def construct_path(self, filename, extension):
        # under filename is the full absolute path to the file, without extension

        _exploded_file_path = filename.split("/")
        # name of the file, without extension
        file_name = _exploded_file_path[-1]
        # and this is just a path to the file, without filename, just a absolute path
        file_path = "/".join(_exploded_file_path[:-1])
        return "%s/%s.%s" % (file_path, file_name, extension)

    def run(self, *args, **kwargs):
        view = self.window.active_view()

        # file_name = absolute path to the file, without extension
        file_name, file_extension = os.path.splitext(view.file_name())

        if not file_extension in self.ALLOWED_EXT:
            print "I can't help you with this file extension, bye."
            return

        new_extension = self.swap_extension(file_extension)
        path = self.construct_path(file_name, new_extension)

        self.window.open_file(path)