gst/glib-compat.c

/*
 * glib-compat.c
 * Functions copied from glib 2.6 and 2.8
 *
 * Copyright 2005 David Schleef <ds@schleef.org>
 */

/* gfileutils.c - File utility functions
 *
 *  Copyright 2000 Red Hat, Inc.
 *
 * GLib is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * GLib is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GLib; see the file COPYING.LIB.  If not,
 * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 *   Boston, MA 02111-1307, USA.
 */

#include "config.h"

#include <glib.h>
#include <glib/gstdio.h>

#include <stdio.h>
#include <errno.h>

#include "glib-compat.h"
#include "glib-compat-private.h"

#include <sys/stat.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#if 0
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#ifndef G_OS_WIN32
#include <sys/wait.h>
#endif
#include <fcntl.h>
#endif


#ifdef G_OS_WIN32
#include <windows.h>
#include <io.h>
#endif /* G_OS_WIN32 */


#ifdef G_OS_WIN32
#define G_DIR_SEPARATOR '\\'
#define G_DIR_SEPARATOR_S "\\"
#define G_IS_DIR_SEPARATOR(c) ((c) == G_DIR_SEPARATOR || (c) == '/')
#define G_SEARCHPATH_SEPARATOR ';'
#define G_SEARCHPATH_SEPARATOR_S ";"
#else
#define G_DIR_SEPARATOR '/'
#define G_DIR_SEPARATOR_S "/"
#define G_IS_DIR_SEPARATOR(c) ((c) == G_DIR_SEPARATOR)
#define G_SEARCHPATH_SEPARATOR ':'
#define G_SEARCHPATH_SEPARATOR_S ":"
#endif


#if !GLIB_CHECK_VERSION (2, 8, 0)
/**
 * g_mkdir_with_parents:
 * @pathname: a pathname in the GLib file name encoding
 * @mode: permissions to use for newly created directories
 *
 * Create a directory if it doesn't already exist. Create intermediate
 * parent directories as needed, too.
 *
 * Returns: 0 if the directory already exists, or was successfully
 * created. Returns -1 if an error occurred, with errno set.
 *
 * Since: 2.8
 */
int
g_mkdir_with_parents (const gchar * pathname, int mode)
{
  gchar *fn, *p;

  if (pathname == NULL || *pathname == '\0') {
    errno = EINVAL;
    return -1;
  }

  fn = g_strdup (pathname);

  if (g_path_is_absolute (fn))
    p = (gchar *) g_path_skip_root (fn);
  else
    p = fn;

  do {
    while (*p && !G_IS_DIR_SEPARATOR (*p))
      p++;

    if (!*p)
      p = NULL;
    else
      *p = '\0';

    if (!g_file_test (fn, G_FILE_TEST_EXISTS)) {
      if (g_mkdir (fn, mode) == -1) {
        int errno_save = errno;

        g_free (fn);
        errno = errno_save;
        return -1;
      }
    } else if (!g_file_test (fn, G_FILE_TEST_IS_DIR)) {
      g_free (fn);
      errno = ENOTDIR;
      return -1;
    }
    if (p) {
      *p++ = G_DIR_SEPARATOR;
      while (*p && G_IS_DIR_SEPARATOR (*p))
        p++;
    }
  }
  while (p);

  g_free (fn);

  return 0;
}
#endif


/**
 * gst_flags_get_first_value:
 * @flags_class: a #GFlagsClass
 * @value: the value
 *
 * Returns the first GFlagsValue which is set in value.
 *
 * This version is copied from GLib 2.8.
 * In GLib 2.6, it didn't check for a flag value being NULL, hence it
 * hits an infinite loop in our flags serialize function
 *
 * Returns: the first GFlagsValue which is set in value, or NULL if none is set.
 */
GFlagsValue *
gst_flags_get_first_value (GFlagsClass * flags_class, guint value)
{
  g_return_val_if_fail (G_IS_FLAGS_CLASS (flags_class), NULL);

  if (flags_class->n_values) {
    GFlagsValue *flags_value;

    if (value == 0) {
      for (flags_value = flags_class->values; flags_value->value_name;
          flags_value++)
        if (flags_value->value == 0)
          return flags_value;
    } else {
      for (flags_value = flags_class->values; flags_value->value_name;
          flags_value++)
        if (flags_value->value != 0
            && (flags_value->value & value) == flags_value->value)
          return flags_value;
    }
  }

  return NULL;
}

/* Adapted from g_value_dup_object to use gst_object_ref */
#include "gstobject.h"
/**
 * g_value_dup_gst_object:
 * @value: the #GstObject value to dup
 *
 * Get the contents of a G_TYPE_OBJECT derived GValue, increasing its reference count.
 * This function exists because of unsafe reference counting in old glib versions.
 *
 * Returns: object content of value, should be unreferenced with gst_object_unref()
 * when no longer needed.
 */
GObject *
g_value_dup_gst_object (const GValue * value)
{
  GObject *o;

  g_return_val_if_fail (G_VALUE_HOLDS_OBJECT (value), NULL);

  o = value->data[0].v_pointer;
  if (!o)
    return NULL;
  g_return_val_if_fail (GST_IS_OBJECT (o), NULL);
  return gst_object_ref (o);
}