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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* lt-variant.c
* Copyright (C) 2011-2012 Akira TAGOH
*
* Authors:
* Akira TAGOH <akira@tagoh.org>
*
* You may distribute under the terms of either the GNU
* Lesser General Public License or the Mozilla Public
* License, as specified in the README file.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "lt-mem.h"
#include "lt-messages.h"
#include "lt-string.h"
#include "lt-utils.h"
#include "lt-variant.h"
#include "lt-variant-private.h"
/**
* SECTION: lt-variant
* @Short_Description: A container class for Variant subtag
* @Title: Container - Variant
*
* This container class provides a data access to Variant subtag entry.
*/
struct _lt_variant_t {
lt_mem_t parent;
char *tag;
char *description;
char *preferred_tag;
lt_list_t *prefix;
};
/*< private >*/
/*< protected >*/
lt_variant_t *
lt_variant_create(void)
{
lt_variant_t *retval;
retval = lt_mem_alloc_object(sizeof (lt_variant_t));
return retval;
}
void
lt_variant_set_tag(lt_variant_t *variant,
const char *subtag)
{
lt_return_if_fail (variant != NULL);
lt_return_if_fail (subtag != NULL);
if (variant->tag)
lt_mem_remove_ref(&variant->parent, variant->tag);
variant->tag = strdup(subtag);
lt_mem_add_ref(&variant->parent, variant->tag, free);
}
void
lt_variant_set_preferred_tag(lt_variant_t *variant,
const char *subtag)
{
lt_return_if_fail (variant != NULL);
lt_return_if_fail (subtag != NULL);
if (variant->preferred_tag)
lt_mem_remove_ref(&variant->parent, variant->preferred_tag);
variant->preferred_tag = strdup(subtag);
lt_mem_add_ref(&variant->parent, variant->preferred_tag, free);
}
void
lt_variant_set_name(lt_variant_t *variant,
const char *description)
{
lt_return_if_fail (variant != NULL);
lt_return_if_fail (description != NULL);
if (variant->description)
lt_mem_remove_ref(&variant->parent, variant->description);
variant->description = strdup(description);
lt_mem_add_ref(&variant->parent, variant->description, free);
}
void
lt_variant_add_prefix(lt_variant_t *variant,
const char *prefix)
{
lt_bool_t no_prefixes;
lt_return_if_fail (variant != NULL);
lt_return_if_fail (prefix != NULL);
no_prefixes = variant->prefix == NULL;
variant->prefix = lt_list_append(variant->prefix, strdup(prefix), free);
if (no_prefixes)
lt_mem_add_ref(&variant->parent, variant->prefix, lt_list_free);
}
/*< public >*/
/**
* lt_variant_ref:
* @variant: a #lt_variant_t.
*
* Increases the reference count of @variant.
*
* Returns: (transfer none): the same @variant object.
*/
lt_variant_t *
lt_variant_ref(lt_variant_t *variant)
{
lt_return_val_if_fail (variant != NULL, NULL);
return lt_mem_ref(&variant->parent);
}
/**
* lt_variant_unref:
* @variant: a #lt_variant_t.
*
* Decreases the reference count of @variant. when its reference count
* drops to 0, the object is finalized (i.e. its memory is freed).
*/
void
lt_variant_unref(lt_variant_t *variant)
{
if (variant)
lt_mem_unref(&variant->parent);
}
/**
* lt_variant_get_better_tag:
* @variant: a #lt_variant_t.
*
* Obtains the better tag for use. this is a convenient function to get
* the preferred-value if available.
*
* Returns: a tag string.
*/
const char *
lt_variant_get_better_tag(const lt_variant_t *variant)
{
const char *retval = lt_variant_get_preferred_tag(variant);
if (!retval)
retval = lt_variant_get_tag(variant);
return retval;
}
/**
* lt_variant_get_tag:
* @variant: a #lt_variant_t.
*
* Obtains the tag name.
*
* Returns: a tag string.
*/
const char *
lt_variant_get_tag(const lt_variant_t *variant)
{
lt_return_val_if_fail (variant != NULL, NULL);
return variant->tag;
}
/**
* lt_variant_get_preferred_tag:
* @variant: a #lt_variant_t.
*
* Obtains the preferred-value. this is available only when the tag is
* marked as deprecated.
*
* Returns: a preferred-value for the tag or %NULL.
*/
const char *
lt_variant_get_preferred_tag(const lt_variant_t *variant)
{
lt_return_val_if_fail (variant != NULL, NULL);
return variant->preferred_tag;
}
/**
* lt_variant_get_name:
* @variant: a #lt_variant_t.
*
* Obtains the description of the subtag.
*
* Returns: a description string.
*/
const char *
lt_variant_get_name(const lt_variant_t *variant)
{
lt_return_val_if_fail (variant != NULL, NULL);
return variant->description;
}
/**
* lt_variant_get_prefix:
* @variant: a #lt_variant_t.
*
* Obtains the prefix being assigned to the subtag.
* This is available only when the subtag has any suitable sequence of
* subtags for forming (with other subtags, as appropriate) a language
* tag when using the variant.
*
* Returns: (element-type utf8) (transfer none): a #lt_list_t contains prefix
* strings or %NULL.
*/
const lt_list_t *
lt_variant_get_prefix(const lt_variant_t *variant)
{
lt_return_val_if_fail (variant != NULL, NULL);
return variant->prefix;
}
/**
* lt_variant_dump:
* @variant: a #lt_variant_t.
*
* Dumps the container information to the standard output.
*/
void
lt_variant_dump(const lt_variant_t *variant)
{
lt_string_t *string = lt_string_new(NULL);
const lt_list_t *list, *l;
const char *preferred = lt_variant_get_preferred_tag(variant);
list = lt_variant_get_prefix(variant);
for (l = list; l != NULL; l = lt_list_next(l)) {
if (lt_string_length(string) == 0)
lt_string_append(string, " (prefix = [");
else
lt_string_append(string, ", ");
lt_string_append(string, (const char *)lt_list_value(l));
}
if (lt_string_length(string) > 0)
lt_string_append(string, "]");
if (preferred) {
if (lt_string_length(string) == 0)
lt_string_append(string, " (");
else
lt_string_append(string, ", ");
lt_string_append_printf(string, "preferred-value: %s",
preferred);
}
if (lt_string_length(string) > 0)
lt_string_append(string, ")");
lt_info("Variant: %s [%s]%s",
lt_variant_get_tag(variant),
lt_variant_get_name(variant),
lt_string_value(string));
lt_string_unref(string);
}
/**
* lt_variant_compare:
* @v1: a #lt_variant_t.
* @v2: a #lt_variant_t.
*
* Compare if @v1 and @v2 is the same object or not.
*
* Returns: %TRUE if it's the same, otherwise %FALSE.
*/
lt_bool_t
lt_variant_compare(const lt_variant_t *v1,
const lt_variant_t *v2)
{
const char *s1, *s2;
if (v1 == v2)
return TRUE;
s1 = v1 ? lt_variant_get_tag(v1) : NULL;
s2 = v2 ? lt_variant_get_tag(v2) : NULL;
if (lt_strcmp0(s1, "*") == 0 ||
lt_strcmp0(s2, "*") == 0)
return TRUE;
return lt_strcmp0(s1, s2) == 0;
}