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/*

 * glib-ext.c -- Map/GList extensions and utility functions for GLIB

 *

 * by Michael Petch <mpetch@gnubg.org>, 2014.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 3 or later of the GNU General Public License as

 * published by the Free Software Foundation.

 *

 * This program 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 * $Id: glib-ext.c,v 1.12 2015/07/31 23:57:55 mdpetch Exp $

 */

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "glib-ext.h"

/*  Based on glib's g_fopen to work around issues with WIN32 

 *  versions of g_fopen 

 */

FILE *

gnubg_g_fopen(const gchar * filename, const gchar * mode)

{

#if defined(WIN32)

    wchar_t *wfilename = g_utf8_to_utf16(filename, -1, NULL, NULL, NULL);

    wchar_t *wmode;

    FILE *retval;

    int save_errno;

    if (wfilename == NULL) {

        errno = EINVAL;

        return NULL;

    }

    wmode = g_utf8_to_utf16(mode, -1, NULL, NULL, NULL);

    if (wmode == NULL) {

        g_free(wfilename);

        errno = EINVAL;

        return NULL;

    }

    retval = _wfopen(wfilename, wmode);

    save_errno = errno;

    g_free(wfilename);

    g_free(wmode);

    errno = save_errno;

    return retval;

#else

    return fopen(filename, mode);

#endif

}

#if ! GLIB_CHECK_VERSION(2,14,0)

/* This code has been backported from the latest GLib

 *

 * Copyright (C) 1995-1997  Peter Mattis, Spencer Kimball and Josh MacDonald

 *

 * gthread.c: MT safety related functions

 * Copyright 1998 Sebastian Wilhelmi; University of Karlsruhe

 *                Owen Taylor

 */

static GMutex *g_once_mutex = NULL;

static GCond *g_once_cond = NULL;

static GSList *g_once_init_list = NULL;

gboolean

g_once_init_enter_impl(volatile gsize * value_location)

{

    gboolean need_init = FALSE;

    /* mutex and cond creation works without g_threads_got_initialized */

    g_mutex_lock(g_once_mutex);

    if (g_atomic_pointer_get((void **) value_location) == NULL) {

        if (!g_slist_find(g_once_init_list, (void *) value_location)) {

            need_init = TRUE;

            g_once_init_list = g_slist_prepend(g_once_init_list, (void *) value_location);

        } else

            do

                g_cond_wait(g_once_cond, g_once_mutex);

            while (g_slist_find(g_once_init_list, (void *) value_location));

    }

    g_mutex_unlock(g_once_mutex);

    return need_init;

}

void

g_once_init_leave(volatile gsize * value_location, gsize initialization_value)

{

    g_return_if_fail(g_atomic_pointer_get((void **) value_location) == NULL);

    g_return_if_fail(initialization_value != 0);

    g_return_if_fail(g_once_init_list != NULL);

    g_atomic_pointer_set((void **) value_location, (void *) initialization_value);

    g_mutex_lock(g_once_mutex);

    g_once_init_list = g_slist_remove(g_once_init_list, (void *) value_location);

    g_cond_broadcast(g_once_cond);

    g_mutex_unlock(g_once_mutex);

}

gboolean

g_once_init_enter(volatile gsize * value_location)

{

    if G_LIKELY

        (g_atomic_pointer_get((void *volatile *) value_location) != NULL)

            return FALSE;

    else

        return g_once_init_enter_impl(value_location);

}

#endif

void

glib_ext_init(void)

{

#if !GLIB_CHECK_VERSION (2,32,0)

    if (!g_thread_supported())

        g_thread_init(NULL);

    g_assert(g_thread_supported());

#endif

#if ! GLIB_CHECK_VERSION(2,14,0)

    if (!g_once_mutex)

        g_once_mutex = g_mutex_new();

    if (!g_once_cond)

        g_once_cond = g_cond_new();

#endif

    return;

}

GLIBEXT_DEFINE_BOXED_TYPE(GListBoxed, g_list_boxed, g_list_copy, g_list_gv_boxed_free)

    GLIBEXT_DEFINE_BOXED_TYPE(GMapBoxed, g_map_boxed, g_list_copy, g_list_gv_boxed_free)

    GLIBEXT_DEFINE_BOXED_TYPE(GMapEntryBoxed, g_mapentry_boxed, g_list_copy, g_list_gv_boxed_free)

#if ! GLIB_CHECK_VERSION(2,28,0)

void

g_list_free_full(GList * list, GDestroyNotify free_func)

{

    g_list_foreach(list, (GFunc) free_func, NULL);

    g_list_free(list);

}

#endif

void

g_value_unsetfree(GValue * gv)

{

    g_value_unset(gv);

    g_free(gv);

}

GMapEntry *

str2gv_map_has_key(GMap * map, GString * key)

{

    guint item;

    for (item = 0; item < g_list_length(map); item++) {

        GString *cmpkey = g_value_get_gstring(g_list_nth_data(g_value_get_boxed(g_list_nth_data(map, item)), 0));

        if (g_string_equal(cmpkey, key))

            return g_list_nth(map, item);

    }

    return NULL;

}

GValue *

str2gv_map_get_key_value(GMap * map, gchar * key, GValue * defaultgv)

{

    GString *gstrkey = g_string_new(key);

    GMapEntry *entry = str2gv_map_has_key(map, gstrkey);

    GValue *gv;

    if (entry)

        gv = g_list_nth_data(g_value_get_boxed(entry->data), 1);

    else

        gv = defaultgv;

    g_string_free(gstrkey, TRUE);

    return gv;

}

void

g_list_gv_free_full(gpointer data)

{

    g_assert(G_IS_VALUE(data));

    if (G_IS_VALUE(data))

        g_value_unsetfree(data);

}

void

g_list_gv_boxed_free(GList * list)

{

    g_list_free_full(list, (GDestroyNotify) g_list_gv_free_full);

}

GList *

create_str2int_tuple(char *str, int value)

{

    GString *tmpstr = g_string_new(str);

    GVALUE_CREATE(G_TYPE_INT, int, value, gvint);

    GVALUE_CREATE(G_TYPE_GSTRING, boxed, tmpstr, gvstr);

    g_string_free(tmpstr, TRUE);

    return g_list_prepend(g_list_prepend(NULL, gvint), gvstr);

}

GList *

create_str2gvalue_tuple(char *str, GValue * gv)

{

    GString *tmpstr = g_string_new(str);

    GVALUE_CREATE(G_TYPE_GSTRING, boxed, tmpstr, gvstr);

    g_string_free(tmpstr, TRUE);

    return g_list_prepend(g_list_prepend(NULL, gv), gvstr);

}

GList *

create_str2double_tuple(char *str, double value)

{

    GString *tmpstr = g_string_new(str);

    GVALUE_CREATE(G_TYPE_DOUBLE, double, value, gvdouble);

    GVALUE_CREATE(G_TYPE_GSTRING, boxed, tmpstr, gvstr);

    g_string_free(tmpstr, TRUE);

    return g_list_prepend(g_list_prepend(NULL, gvdouble), gvstr);

}

void

free_strmap_tuple(GList * tuple)

{

    g_string_free(g_list_nth_data(tuple, 0), TRUE);

    g_free(g_list_nth_data(tuple, 1));

    g_list_free(tuple);

}

void

g_value_list_tostring(GString * str, GList * list, int depth)

{

    GList *cur = list;

    while (cur != NULL) {

        g_value_tostring(str, cur->data, depth);

        if ((cur = g_list_next(cur)))

            g_string_append(str, ", ");

    }

}

void

g_value_tostring(GString * str, GValue * gv, int depth)

{

    if (!gv)

        return;

    g_assert(G_IS_VALUE(gv));

    if (G_VALUE_HOLDS_INT(gv)) {

        g_string_append_printf(str, "%d", g_value_get_int(gv));

    } else if (G_VALUE_HOLDS_DOUBLE(gv)) {

        g_string_append_printf(str, "%lf", g_value_get_double(gv));

    } else if (G_VALUE_HOLDS_GSTRING(gv)) {

        g_string_append_printf(str, "\"%s\"", g_value_get_gstring_gchar(gv));

    } else if (G_VALUE_HOLDS_BOXED_GLIST_GV(gv)) {

        g_string_append_c(str, '(');

        g_value_list_tostring(str, g_value_get_boxed(gv), depth + 1);

        g_string_append_c(str, ')');

    } else if (G_VALUE_HOLDS_BOXED_MAP_GV(gv)) {

        g_string_append_c(str, '[');

        g_value_list_tostring(str, g_value_get_boxed(gv), depth + 1);

        g_string_append_c(str, ']');

    } else if (G_VALUE_HOLDS_BOXED_MAPENTRY_GV(gv)) {

        g_value_tostring(str, g_list_nth_data(g_value_get_boxed(gv), 0), depth + 1);

        g_string_append(str, " : ");

        g_value_tostring(str, g_list_nth_data(g_value_get_boxed(gv), 1), depth + 1);

    }

}