240 lines
6.2 KiB
C
240 lines
6.2 KiB
C
/*
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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 <stdlib.h>
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#include "sql-value.h"
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/**
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* SECTION: sql-value
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* @Short_description: generic value
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* @Title: SqlValue
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*
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* A generic value that can be used in operations (#SqlOperation) and of course
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* in any place where an #SqlExpr can be used.
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**/
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G_DEFINE_TYPE (SqlValue, sql_value, SQL_TYPE_EXPR);
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SqlObject * sql_value_new ()
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{
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return g_object_new (SQL_TYPE_VALUE, NULL);
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}
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SqlObject * sql_value_new_with_value (const GValue * value)
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{
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g_return_val_if_fail (value, NULL);
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g_return_val_if_fail (G_IS_VALUE (value), NULL);
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return g_object_new (SQL_TYPE_VALUE, "value", value, NULL);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Private
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static void sql_value_render (SqlValue * obj, SqlRender * render)
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{
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GValue * value = obj->value;
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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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sql_render_add_token (render, g_value_get_boolean (value) ? "TRUE" : "FALSE");
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break;
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case G_TYPE_CHAR:
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sql_render_printf (render, "'%c'", g_value_get_schar (value));
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break;
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case G_TYPE_INT:
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sql_render_printf (render, "%i", g_value_get_int (value));
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break;
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case G_TYPE_UINT:
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sql_render_printf (render, "%u", g_value_get_uint (value));
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break;
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case G_TYPE_LONG:
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sql_render_printf (render, "%ld", g_value_get_long (value));
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break;
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case G_TYPE_ULONG:
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sql_render_printf (render, "%lu", g_value_get_ulong (value));
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break;
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case G_TYPE_FLOAT:
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case G_TYPE_DOUBLE:
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{
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gchar buffer[G_ASCII_DTOSTR_BUF_SIZE];
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g_ascii_dtostr (buffer, G_ASCII_DTOSTR_BUF_SIZE,
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(type == G_TYPE_FLOAT)
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?(gdouble) g_value_get_float (value)
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:g_value_get_double (value)
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);
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sql_render_add_espace (render);
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sql_render_append (render, buffer);
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break;
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}
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case G_TYPE_STRING:
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sql_render_append_with_delimiter (render, g_value_get_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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{
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GDate * date = g_value_get_boxed (value);
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sql_render_printf (render, "'%04i-%02i-%02i'"
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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 if (type == G_TYPE_DATE_TIME)
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{
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GDateTime * date_time = g_value_get_boxed (value);
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sql_render_printf (render, g_date_time_format (date_time, "'%Y-%m-%d %T'"));
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}
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else if (type == GVN_TYPE_NULL)
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sql_render_add_token (render, "NULL");
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else
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sql_render_set_error (render);
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}
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}
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static gboolean sql_value_is_ready (SqlValue * obj)
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{
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return !gvn_value_is_null (obj->value);
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}
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static void sql_value_put_value (SqlValue * obj, const GValue * value)
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{
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if (gvn_value_ccopy (value, obj->value))
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g_signal_emit_by_name (obj, "changed");
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}
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static void sql_value_cb_value_changed (GvnParam * param, const GValue * value, SqlValue * obj)
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{
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sql_value_put_value (obj, value);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Public
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const GValue * sql_value_get_value (SqlValue * obj)
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{
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g_return_val_if_fail (SQL_IS_VALUE (obj), NULL);
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return obj->value;
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}
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void sql_value_set_value (SqlValue * obj, const GValue * value)
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{
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g_return_if_fail (SQL_IS_VALUE (obj));
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g_return_if_fail (!obj->param);
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sql_value_put_value (obj, value);
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}
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void sql_value_set_param (SqlValue * obj, GvnParam * param)
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{
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g_return_if_fail (SQL_IS_VALUE (obj));
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g_return_if_fail (GVN_IS_PARAM (param) || !param);
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if (obj->param)
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{
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g_signal_handlers_disconnect_by_func (obj->param,
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sql_value_cb_value_changed, obj);
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g_clear_object (&obj->param);
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}
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if (param)
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{
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obj->param = g_object_ref_sink (param);
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g_signal_connect (param, "value-changed",
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G_CALLBACK (sql_value_cb_value_changed), obj);
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sql_value_put_value (obj, gvn_param_get_value (param));
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}
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Properties
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enum
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{
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PROP_PARAM = 1
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,PROP_VALUE
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};
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static void sql_value_set_property (SqlValue * obj, guint id, const GValue * value, GParamSpec * pspec)
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{
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switch (id)
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{
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case PROP_PARAM:
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sql_value_set_param (obj, g_value_get_object (value));
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break;
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case PROP_VALUE:
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sql_value_set_value (obj, g_value_get_boxed (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, id, pspec);
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}
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}
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static void sql_value_get_property (SqlValue * obj, guint id, GValue * value, GParamSpec * pspec)
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{
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switch (id)
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{
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case PROP_PARAM:
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g_value_set_object (value, obj->param);
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break;
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case PROP_VALUE:
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g_value_set_boxed (value, obj->value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (obj, id, pspec);
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}
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++ Class
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static void sql_value_init (SqlValue * obj)
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{
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obj->param = NULL;
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obj->value = g_new0 (GValue, 1);
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g_value_init (obj->value, GVN_TYPE_NULL);
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}
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static void sql_value_finalize (SqlValue * obj)
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{
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sql_value_set_param (obj, NULL);
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g_value_unset (obj->value);
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g_free (obj->value);
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G_OBJECT_CLASS (sql_value_parent_class)->finalize (G_OBJECT (obj));
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}
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static void sql_value_class_init (SqlValueClass * klass)
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{
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GObjectClass * k = G_OBJECT_CLASS (klass);
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k->finalize = (GObjectFinalizeFunc) sql_value_finalize;
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k->set_property = (GObjectSetPropertyFunc) sql_value_set_property;
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k->get_property = (GObjectGetPropertyFunc) sql_value_get_property;
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SQL_OBJECT_CLASS (klass)->render = (SqlRenderFunc) sql_value_render;
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SQL_OBJECT_CLASS (klass)->is_ready = (SqlObjectIsReadyFunc) sql_value_is_ready;
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g_object_class_install_property (k, PROP_PARAM,
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g_param_spec_object ("param"
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,_("Param")
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,_("The param which is linked")
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,GVN_TYPE_PARAM, G_PARAM_READWRITE
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));
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g_object_class_install_property (k, PROP_VALUE,
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g_param_spec_boxed ("value"
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,_("Value")
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,_("The value")
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,G_TYPE_VALUE, G_PARAM_READWRITE
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));
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}
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