576 lines
14 KiB
C
576 lines
14 KiB
C
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/*
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* Copyright (C) 2012 - Juan Ferrer Toribio
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "gvn-value.h"
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#include "gvn-misc.h"
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/**
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* SECTION: gvn-value
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* @Short_description: additional value manipulation functions
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* @Title: GvnValue
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* @See_also: #DbForm, #DbConn
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*
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* This functions are intended to expand or ease the use of the original GObject
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* library #GValue utilites.
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**/
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void gvn_value_new_from_string_real (GValue * value, GType type, const gchar * string, gsize len)
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{
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switch (type)
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{
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case G_TYPE_BOOLEAN:
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g_value_set_boolean (value, atoi (string));
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break;
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case G_TYPE_CHAR:
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g_value_set_schar (value, atoi (string));
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break;
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case G_TYPE_INT:
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g_value_set_int (value, atoi (string));
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break;
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case G_TYPE_UINT:
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g_value_set_int (value, (guint) atoi (string));
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break;
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case G_TYPE_LONG:
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g_value_set_long (value, g_ascii_strtoll (string, NULL, 0));
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break;
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case G_TYPE_ULONG:
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g_value_set_ulong (value, g_ascii_strtoull (string, NULL, 0));
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break;
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case G_TYPE_FLOAT:
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g_value_set_float (value, atof (string));
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break;
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case G_TYPE_DOUBLE:
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g_value_set_double (value, g_ascii_strtod (string, NULL));
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break;
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case G_TYPE_STRING:
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g_value_set_string (value, string);
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break;
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default:
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{
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if (len == -1)
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len = strlen (string);
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if (type == G_TYPE_DATE)
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{
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if (len >= 10)
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{
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GDate * date = g_date_new_dmy (
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atoi (string + 8)
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,atoi (string + 5)
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,atoi (string)
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);
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g_value_take_boxed (value, date);
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}
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else
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g_warning ("Gvn: Can't transform string to GDate");
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}
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else if (type == G_TYPE_DATE_TIME)
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{
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if (len >= 19)
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{
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GDateTime * date_time = g_date_time_new_local (
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atoi (string)
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,atoi (string + 5)
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,atoi (string + 8)
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,atoi (string + 11)
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,atoi (string + 14)
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,atoi (string + 17)
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);
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g_value_take_boxed (value, date_time);
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}
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else
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g_warning ("Gvn: Can't transform string to GDateTime");
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}
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else if (type == G_TYPE_BYTES)
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{
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if (len > 0)
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g_value_take_boxed (value, g_bytes_new (string, len));
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else
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g_warning ("Gvn: Can't transform string to GBytes");
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}
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else if (type != GVN_TYPE_NULL)
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g_return_if_reached ();
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}
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}
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}
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static void gvn_value_transform_string_to_any (const GValue * src, GValue * dst)
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{
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gvn_value_new_from_string_real (dst,
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G_VALUE_TYPE (dst), g_value_get_string (src), -1);
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}
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static void gvn_value_transform_null_to_any (const GValue * src, GValue * dst) {}
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static void gvn_value_transform_any_to_null (const GValue * src, GValue * dst)
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{
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gvn_value_set_null (dst);
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}
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static void gvn_value_transform_date_to_string (const GValue * src, GValue * dst)
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{
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GDate * date = g_value_get_boxed (src);
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if (date)
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{
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g_value_take_string (dst, g_strdup_printf ("%04u-%02u-%02u"
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,g_date_get_year (date)
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,g_date_get_month (date)
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,g_date_get_day (date)
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));
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}
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else
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g_value_take_string (dst, NULL);
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}
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static void gvn_value_transform_date_time_to_string (const GValue * src, GValue * dst)
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{
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gpointer date = g_value_get_boxed (src);
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if (date)
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g_value_take_string (dst, g_date_time_format (date, "%Y-%m-%d %T"));
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else
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g_value_take_string (dst, NULL);
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}
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static void gvn_value_transform_date_time_to_date (const GValue * src, GValue * dst)
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{
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GDateTime * date_time = g_value_get_boxed (src);
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if (date_time)
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{
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GDate * date = g_date_new_dmy (
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g_date_time_get_day_of_month (date_time)
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,g_date_time_get_month (date_time)
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,g_date_time_get_year (date_time)
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);
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g_value_take_boxed (dst, date);
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}
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else
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g_value_take_boxed (dst, NULL);
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}
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static void gvn_value_transform_date_to_date_time (const GValue * src, GValue * dst)
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{
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GDate * date = g_value_get_boxed (src);
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if (date)
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{
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GDateTime * date_time = g_date_time_new_utc (
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g_date_get_year (date)
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,g_date_get_month (date)
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,g_date_get_day (date)
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,0
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,0
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,0.0
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);
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g_value_take_boxed (dst, date_time);
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}
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else
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g_value_take_boxed (dst, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Public
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/**
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* gvn_value_new:
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* @type: the type of new #GValue
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*
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* Creates a new #GValue
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*
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* Return value: a #GValue.
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**/
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GValue * gvn_value_new (GType type)
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{
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GValue * value = g_new0 (GValue, 1);
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return g_value_init (value, type);
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}
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/**
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* gvn_value_is_null:
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* @value: the value to be checked
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*
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* Checks if a @value is of type GVN_TYPE_NULL
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*
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* Return value: %TRUE if its NULL, %FALSE otherwise.
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**/
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/**
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* gvn_value_set_null:
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* @value: the value to be nulled
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*
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* Checks if a @value is of type GVN_TYPE_NULL, if not, sets it.
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**/
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void gvn_value_set_null (GValue * value)
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{
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g_return_if_fail (G_IS_VALUE (value));
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if (!gvn_value_is_null (value))
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{
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g_value_unset (value);
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g_value_init (value, GVN_TYPE_NULL);
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}
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}
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/**
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* gvn_value_new_from_string:
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* @value: an uninitilized #GValue
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* @string: a string to be converted
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* @length: length of @string or -1 if its null terminated
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* @type: the type to be converted
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*
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* Creates a new @value from a string
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**/
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void gvn_value_new_from_string (GValue * value, GType type, const gchar * string, gsize len)
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{
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g_return_if_fail (string != NULL);
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g_value_init (value, type);
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gvn_value_new_from_string_real (value, type, string, len);
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}
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/**
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* gvn_value_new_valist:
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* @value: an uninitilized #GValue
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* @type: the type of value
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* @content: a pointer to the value content
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*
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* Initializes the @value with the specified type and content.
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**/
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void gvn_value_new_with_content (GValue * value, GType type, gpointer content)
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{
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g_value_init (value, type);
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switch (type)
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{
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case G_TYPE_BOOLEAN:
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g_value_set_boolean (value, *((gboolean *) content));
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break;
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case G_TYPE_CHAR:
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g_value_set_schar (value, *((gint8 *) content));
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break;
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case G_TYPE_INT:
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g_value_set_int (value, *((gint *) content));
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break;
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case G_TYPE_UINT:
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g_value_set_uint (value, *((guint *) content));
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break;
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case G_TYPE_LONG:
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g_value_set_long (value, *((glong *) content));
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break;
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case G_TYPE_ULONG:
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g_value_set_ulong (value, *((gulong *) content));
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break;
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case G_TYPE_FLOAT:
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g_value_set_float (value, *((gfloat *) content));
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break;
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case G_TYPE_DOUBLE:
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g_value_set_double (value, *((gdouble *) content));
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break;
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case G_TYPE_STRING:
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g_value_set_string (value, (gchar *) content);
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break;
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default:
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if (type == G_TYPE_DATE
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|| type == G_TYPE_BYTES)
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g_value_set_boxed (value, content);
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else if (G_TYPE_IS_OBJECT (type))
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g_value_set_object (value, content);
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else if (type != GVN_TYPE_NULL)
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g_return_if_reached ();
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}
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}
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/**
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* gvn_value_get_valist:
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* @value: the type of value
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* @va: a string to be converted
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*
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* Sets the value of the initilized @value with the value of next
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* element in @va
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**/
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void gvn_value_get_valist (const GValue * value, va_list va)
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{
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GType type = G_VALUE_TYPE (value);
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switch (type)
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{
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case G_TYPE_BOOLEAN:
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*va_arg (va, gboolean*) = g_value_get_boolean (value);
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break;
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case G_TYPE_CHAR:
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*va_arg (va, gint8*) = g_value_get_schar (value);
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break;
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case G_TYPE_INT:
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*va_arg (va, gint*) = g_value_get_int (value);
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break;
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case G_TYPE_UINT:
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*va_arg (va, guint*) = g_value_get_uint (value);
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break;
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case G_TYPE_LONG:
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*va_arg (va, glong*) = g_value_get_long (value);
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break;
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case G_TYPE_ULONG:
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*va_arg (va, gulong*) = g_value_get_ulong (value);
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break;
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case G_TYPE_FLOAT:
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*va_arg (va, gfloat*) = g_value_get_float (value);
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break;
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case G_TYPE_DOUBLE:
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*va_arg (va, gdouble*) = g_value_get_double (value);
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break;
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case G_TYPE_STRING:
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*va_arg (va, gchar**) = g_value_dup_string (value);
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break;
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default:
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if (type == G_TYPE_DATE
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|| type == G_TYPE_BYTES)
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*va_arg (va, gpointer*) = g_value_dup_boxed (value);
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else if (G_TYPE_IS_OBJECT (type))
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*va_arg (va, gpointer*) = g_value_dup_object (value);
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else if (type != GVN_TYPE_NULL)
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g_return_if_reached ();
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}
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}
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/**
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* gvn_value_compare:
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* @a: a #GValue to be compared
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* @b: a #GValue to be compared
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*
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* Does the same as g_value_compare0(), but returns a %gboolean.
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|
|
*
|
|||
|
|
* Return value: %TRUE if two values are equal, %FALSE otherwise.
|
|||
|
|
**/
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* gvn_value_compare0:
|
|||
|
|
* @a: #GValue to be compared
|
|||
|
|
* @b: #GValue to be compared
|
|||
|
|
*
|
|||
|
|
* Compares a and b. The two values must be of the same type or GVN_TYPE_NULL.
|
|||
|
|
*
|
|||
|
|
* Return value: -1, 0 or 1, if @a is <, == or > than @b.
|
|||
|
|
**/
|
|||
|
|
gint gvn_value_compare0 (const GValue * a, const GValue * b)
|
|||
|
|
{
|
|||
|
|
GType a_type = G_VALUE_TYPE (a);
|
|||
|
|
gboolean a_is_val = G_IS_VALUE (a);
|
|||
|
|
gboolean b_is_val = G_IS_VALUE (b);
|
|||
|
|
|
|||
|
|
if (!(a_is_val && b_is_val))
|
|||
|
|
{
|
|||
|
|
if (a_is_val)
|
|||
|
|
return 1;
|
|||
|
|
if (b_is_val)
|
|||
|
|
return -1;
|
|||
|
|
}
|
|||
|
|
else if (a_type == G_VALUE_TYPE (b))
|
|||
|
|
{
|
|||
|
|
switch (a_type)
|
|||
|
|
{
|
|||
|
|
case G_TYPE_FLOAT:
|
|||
|
|
{
|
|||
|
|
gfloat aux = g_value_get_float (a) - g_value_get_float (b);
|
|||
|
|
return (aux > 0.0) ? 1 : (aux < 0.0) ? -1 : 0;
|
|||
|
|
}
|
|||
|
|
case G_TYPE_DOUBLE:
|
|||
|
|
{
|
|||
|
|
gdouble aux = g_value_get_double (a) - g_value_get_double (b);
|
|||
|
|
return (aux > 0.0) ? 1 : (aux < 0.0) ? -1 : 0;
|
|||
|
|
}
|
|||
|
|
case G_TYPE_INT:
|
|||
|
|
return g_value_get_int (a) - g_value_get_int (b);
|
|||
|
|
case G_TYPE_UINT:
|
|||
|
|
return (gint) (g_value_get_uint (a) - g_value_get_uint (b));
|
|||
|
|
case G_TYPE_LONG:
|
|||
|
|
return (gint) (g_value_get_long (a) - g_value_get_long (b));
|
|||
|
|
case G_TYPE_ULONG:
|
|||
|
|
return (gint) (g_value_get_ulong (a) - g_value_get_ulong (b));
|
|||
|
|
case G_TYPE_BOOLEAN:
|
|||
|
|
return (gint) (g_value_get_boolean (a) - g_value_get_boolean (b));
|
|||
|
|
case G_TYPE_CHAR:
|
|||
|
|
return (gint) (g_value_get_schar (a) - g_value_get_schar (b));
|
|||
|
|
case G_TYPE_STRING:
|
|||
|
|
return g_strcmp0 (g_value_get_string (a), g_value_get_string (b));
|
|||
|
|
default:
|
|||
|
|
if (a_type == GVN_TYPE_NULL)
|
|||
|
|
return 0;
|
|||
|
|
if (G_TYPE_FUNDAMENTAL (a_type) == G_TYPE_BOXED)
|
|||
|
|
{
|
|||
|
|
gpointer a_boxed = g_value_get_boxed (a);
|
|||
|
|
gpointer b_boxed = g_value_get_boxed (b);
|
|||
|
|
|
|||
|
|
if (!a_boxed)
|
|||
|
|
return (gint) (a_boxed - b_boxed);
|
|||
|
|
if (!b_boxed)
|
|||
|
|
return (gint) (a_boxed - b_boxed);
|
|||
|
|
if (a_type == G_TYPE_DATE)
|
|||
|
|
return g_date_compare (a_boxed, b_boxed);
|
|||
|
|
if (a_type == G_TYPE_DATE_TIME)
|
|||
|
|
return g_date_time_compare (a_boxed, b_boxed);
|
|||
|
|
else if (a_type == G_TYPE_BYTES)
|
|||
|
|
return (gint) (a_boxed - b_boxed);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
g_warning (_("Attempting to compare invalid types: %s\n"),
|
|||
|
|
g_type_name (a_type));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
else if (gvn_value_is_null (a))
|
|||
|
|
return -1;
|
|||
|
|
else if (gvn_value_is_null (b))
|
|||
|
|
return 1;
|
|||
|
|
|
|||
|
|
return 1;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* gvn_value_copy:
|
|||
|
|
* @src: source #GValue
|
|||
|
|
* @dst: destination #GValue
|
|||
|
|
*
|
|||
|
|
* Copies the value of @src into @dst. This function also works with #GvnNull
|
|||
|
|
* values.
|
|||
|
|
**/
|
|||
|
|
void gvn_value_copy (const GValue * src, GValue * dst)
|
|||
|
|
{
|
|||
|
|
g_return_if_fail (G_IS_VALUE (src));
|
|||
|
|
g_return_if_fail (G_IS_VALUE (dst));
|
|||
|
|
|
|||
|
|
if (G_VALUE_TYPE (src) != G_VALUE_TYPE (dst))
|
|||
|
|
{
|
|||
|
|
g_value_unset (dst);
|
|||
|
|
g_value_init (dst, G_VALUE_TYPE (src));
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
g_value_copy (src, dst);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* gvn_value_ccopy:
|
|||
|
|
* @src: source #GValue
|
|||
|
|
* @dst: destination #GValue
|
|||
|
|
*
|
|||
|
|
* Compares @src with @dst, if they are different copies the value of @src into
|
|||
|
|
* @dst. This function also works with #GvnNull values.
|
|||
|
|
*
|
|||
|
|
* Return value: %TRUE if they are copied, %FALSE if they are equals.
|
|||
|
|
**/
|
|||
|
|
gboolean gvn_value_ccopy (const GValue * src, GValue * dst)
|
|||
|
|
{
|
|||
|
|
if (gvn_value_compare (src, dst))
|
|||
|
|
return FALSE;
|
|||
|
|
|
|||
|
|
gvn_value_copy (src, dst);
|
|||
|
|
return TRUE;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* gvn_value_to_format_string:
|
|||
|
|
**/
|
|||
|
|
void gvn_value_to_format_string (const GValue * src, guint digits, GValue * dst)
|
|||
|
|
{
|
|||
|
|
GType type = G_VALUE_TYPE (src);
|
|||
|
|
|
|||
|
|
g_value_init (dst, G_TYPE_STRING);
|
|||
|
|
|
|||
|
|
switch (type)
|
|||
|
|
{
|
|||
|
|
case G_TYPE_FLOAT:
|
|||
|
|
case G_TYPE_DOUBLE:
|
|||
|
|
{
|
|||
|
|
gdouble dec;
|
|||
|
|
gchar * format;
|
|||
|
|
gchar buffer [G_ASCII_DTOSTR_BUF_SIZE];
|
|||
|
|
|
|||
|
|
if (type == G_TYPE_FLOAT)
|
|||
|
|
dec = (gdouble) g_value_get_float (src);
|
|||
|
|
else
|
|||
|
|
dec = g_value_get_double (src);
|
|||
|
|
|
|||
|
|
format = g_strdup_printf ("%%.%df", digits);
|
|||
|
|
g_ascii_formatd (buffer, G_ASCII_DTOSTR_BUF_SIZE, format, dec);
|
|||
|
|
g_value_set_string (dst, buffer);
|
|||
|
|
g_free (format);
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
default:
|
|||
|
|
if (!gvn_value_is_null (src))
|
|||
|
|
g_value_transform (src, dst);
|
|||
|
|
else
|
|||
|
|
g_value_set_string (dst, "");
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/**
|
|||
|
|
* gvn_type_init:
|
|||
|
|
*
|
|||
|
|
* Initializes library types, also calls g_type_init().
|
|||
|
|
**/
|
|||
|
|
void gvn_type_init ()
|
|||
|
|
{
|
|||
|
|
gint n;
|
|||
|
|
|
|||
|
|
GType types[] = {
|
|||
|
|
G_TYPE_BOOLEAN
|
|||
|
|
,G_TYPE_CHAR
|
|||
|
|
,G_TYPE_INT
|
|||
|
|
,G_TYPE_UINT
|
|||
|
|
,G_TYPE_LONG
|
|||
|
|
,G_TYPE_ULONG
|
|||
|
|
,G_TYPE_FLOAT
|
|||
|
|
,G_TYPE_DOUBLE
|
|||
|
|
,G_TYPE_STRING
|
|||
|
|
,G_TYPE_DATE
|
|||
|
|
,G_TYPE_DATE_TIME
|
|||
|
|
,G_TYPE_BYTES
|
|||
|
|
,G_TYPE_NONE
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
for (n = 0; types[n] != G_TYPE_NONE; n++)
|
|||
|
|
{
|
|||
|
|
g_value_register_transform_func (types[n], GVN_TYPE_NULL,
|
|||
|
|
gvn_value_transform_any_to_null
|
|||
|
|
);
|
|||
|
|
g_value_register_transform_func (GVN_TYPE_NULL, types[n],
|
|||
|
|
gvn_value_transform_null_to_any
|
|||
|
|
);
|
|||
|
|
g_value_register_transform_func (G_TYPE_STRING, types[n],
|
|||
|
|
gvn_value_transform_string_to_any
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
g_value_register_transform_func (G_TYPE_DATE, G_TYPE_STRING,
|
|||
|
|
gvn_value_transform_date_to_string
|
|||
|
|
);
|
|||
|
|
g_value_register_transform_func (G_TYPE_DATE_TIME, G_TYPE_STRING,
|
|||
|
|
gvn_value_transform_date_time_to_string
|
|||
|
|
);
|
|||
|
|
g_value_register_transform_func (G_TYPE_DATE_TIME, G_TYPE_DATE,
|
|||
|
|
gvn_value_transform_date_time_to_date
|
|||
|
|
);
|
|||
|
|
g_value_register_transform_func (G_TYPE_DATE, G_TYPE_DATE_TIME,
|
|||
|
|
gvn_value_transform_date_to_date_time
|
|||
|
|
);
|
|||
|
|
}
|
|||
|
|
|