/usr/include/libgda-5.0/libgda/gda-value.h is in libgda-5.0-dev 5.2.4-9.
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* Copyright (C) 2001 - 2003 Rodrigo Moya <rodrigo@gnome-db.org>
* Copyright (C) 2002 - 2003 Gonzalo Paniagua Javier <gonzalo@gnome-db.org>
* Copyright (C) 2002 - 2013 Vivien Malerba <malerba@gnome-db.org>
* Copyright (C) 2003 Akira TAGOH <tagoh@gnome-db.org>
* Copyright (C) 2003 Danilo Schoeneberg <dschoene@src.gnome.org>
* Copyright (C) 2003 Laurent Sansonetti <laurent@datarescue.be>
* Copyright (C) 2004 - 2011 Murray Cumming <murrayc@murrayc.com>
* Copyright (C) 2004 Paisa Seeluangsawat <paisa@users.sf.net>
* Copyright (C) 2008 Przemysław Grzegorczyk <pgrzegorczyk@gmail.com>
* Copyright (C) 2009 Bas Driessen <bas.driessen@xobas.com>
* Copyright (C) 2011 Daniel Espinosa <despinosa@src.gnome.org>
*
* This library 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.
*
* This library 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 this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GDA_VALUE_H__
#define __GDA_VALUE_H__
#include <time.h>
#include <glib.h>
#include <glib-object.h>
#include <libxml/tree.h>
#include <libgda/gda-decl.h>
G_BEGIN_DECLS
#define GDA_TIMEZONE_INVALID (2*12*60*60)
/* Definition of the GType's values used in GValue*/
#define GDA_TYPE_NULL (gda_null_get_type())
#define GDA_TYPE_DEFAULT (gda_default_get_type())
#define GDA_TYPE_BINARY (gda_binary_get_type())
#define GDA_TYPE_BLOB (gda_blob_get_type())
#define GDA_TYPE_GEOMETRIC_POINT (gda_geometricpoint_get_type())
#define GDA_TYPE_NUMERIC (gda_numeric_get_type())
#define GDA_TYPE_SHORT (gda_short_get_type())
#define GDA_TYPE_USHORT (gda_ushort_get_type())
#define GDA_TYPE_TIME (gda_time_get_type())
#define GDA_TYPE_TIMESTAMP (gda_timestamp_get_type())
/* Definition of the GDA_VALUE_HOLDS macros */
#define GDA_VALUE_HOLDS_NULL(value) G_VALUE_HOLDS(value, GDA_TYPE_NULL)
#define GDA_VALUE_HOLDS_DEFAULT(value) G_VALUE_HOLDS(value, GDA_TYPE_DEFAULT)
#define GDA_VALUE_HOLDS_BINARY(value) G_VALUE_HOLDS(value, GDA_TYPE_BINARY)
#define GDA_VALUE_HOLDS_BLOB(value) G_VALUE_HOLDS(value, GDA_TYPE_BLOB)
#define GDA_VALUE_HOLDS_GEOMETRIC_POINT(value) G_VALUE_HOLDS(value, GDA_TYPE_GEOMETRIC_POINT)
#define GDA_VALUE_HOLDS_NUMERIC(value) G_VALUE_HOLDS(value, GDA_TYPE_NUMERIC)
#define GDA_VALUE_HOLDS_SHORT(value) G_VALUE_HOLDS(value, GDA_TYPE_SHORT)
#define GDA_VALUE_HOLDS_USHORT(value) G_VALUE_HOLDS(value, GDA_TYPE_USHORT)
#define GDA_VALUE_HOLDS_TIME(value) G_VALUE_HOLDS(value, GDA_TYPE_TIME)
#define GDA_VALUE_HOLDS_TIMESTAMP(value) G_VALUE_HOLDS(value, GDA_TYPE_TIMESTAMP)
/**
* GdaGeometricPoint:
* @x:
* @y:
*/
typedef struct {
gdouble x;
gdouble y;
} GdaGeometricPoint;
typedef struct _GdaNumeric GdaNumeric;
# ifdef GSEAL_ENABLE
# else
struct _GdaNumeric {
gchar* GSEAL(number);
glong GSEAL(precision);
glong GSEAL(width);
/*< private >*/
gpointer reserved; /* reserved for future usage with GMP (http://gmplib.org/) */
};
#endif
/**
* GdaTime:
* @hour: hour representation of the time, as a number between 0 and 23
* @minute: minute representation of the time, as a number between 0 and 59
* @second: second representation of the time, as a number between 0 and 59
* @fraction: fractionnal part of the seconds, in millionth' of second
* @timezone: number of seconds added to the GMT timezone
*
* Represents a time information.
*/
typedef struct {
gushort hour;
gushort minute;
gushort second;
gulong fraction;
glong timezone;
} GdaTime;
/**
* GdaTimestamp:
* @year: year representation of the time stamp
* @month: month representation of the time stamp, as a number between 1 and 12
* @day: day representation of the time stamp, as a number between 1 and 31
* @hour: hour representation of the time stamp, as a number between 0 and 23
* @minute: minute representation of the time stamp, as a number between 0 and 59
* @second: second representation of the time stamp, as a number between 0 and 59
* @fraction: fractionnal part of the seconds, in millionth' of second
* @timezone: number of seconds added to the GMT timezone
*
* Represents an instant (a time stamp)
*/
typedef struct {
gshort year;
gushort month;
gushort day;
gushort hour;
gushort minute;
gushort second;
gulong fraction;
glong timezone;
} GdaTimestamp;
/**
* GdaBinary:
* @data:
* @binary_length:
*/
typedef struct {
guchar *data;
glong binary_length;
} GdaBinary;
/**
* GdaBlob:
* @data: data buffer, as a #GdaBinary
* @op: (allow-none): a pointer to a #GdaBlopOp, or %NULL
*
* Represents some binary data, accessed through a #GdaBlobOp object.
* @op is generally set up by database providers when giving access to an existing BLOB in
* a database, but can be modified if needed using gda_blob_set_op().
*/
typedef struct {
GdaBinary data;
GdaBlobOp *op;
} GdaBlob;
#define gda_value_isa(value, type) (G_VALUE_HOLDS(value, type))
/**
* SECTION:gda-value
* @short_description: Assorted functions for dealing with #GValue values
* @title: A single Value
* @stability: Stable
* @see_also: #GValue and #GdaBlobOp
*
* &LIBGDA; manages each individual value within an opaque #GValue structure. Any GValue type can be used,
* and &LIBGDA; adds a few more data types usually found in DBMS such as NUMERIC, TIME, TIMESTAMP, GEOMETRIC POINT, BINARY and BLOB.
*
* Libgda makes a distinction between binary and blob types
* <itemizedlist>
* <listitem><para>binary data can be inserted into an SQL statement using a
* (DBMS dependent) syntax, such as "X'ABCD'" syntax for SQLite or the binary strings syntax for PostgreSQL. Binary data
* is manipulated using a #GdaBinary structure (which is basically a bytes buffer and a length attribute).
* </para></listitem>
* <listitem><para>blob data are a special feature that some DBMS have which requires some non SQL code to manipulate them.
* Usually only a reference is stored in each table containing a blob, and the actual blob data resides somewhere on the disk
* (while still being managed transparently by the database). For example PotsgreSQL stores blobs as files on the disk and
* references them using object identifiers (Oid). Blob data
* is manipulated using a #GdaBlob structure which encapsulates a #GdaBinary structure and adds a reference to a
* #GdaBlobOp object used to read and write data from and to the blob.
* </para></listitem>
* </itemizedlist>
* Please note that is distinction between binary data and blobs is Libgda only and does not reflect the DBMS's documentations;
* for instance MySQL has several BLOB types but Libgda interprets them as binary types.
*
* Each provider or connection can be queried about its blob support using the gda_server_provider_supports_feature() or
* gda_connection_supports_feature() methods.
*
* There are two special value types which are:
* <itemizedlist>
* <listitem><para>the GDA_TYPE_NULL value which never changes and acutally represents an SQL NULL value</para></listitem>
* <listitem><para>the GDA_TYPE_DEFAULT value which represents a default value which &LIBGDA; does not interpret (such as when a table column's default value is a function call)</para></listitem>
* </itemizedlist>
*/
GValue *gda_value_new (GType type);
GValue *gda_value_new_null (void);
GValue *gda_value_new_default (const gchar *default_val);
GValue *gda_value_new_binary (const guchar *val, glong size);
GValue *gda_value_new_blob (const guchar *val, glong size);
GValue *gda_value_new_blob_from_file (const gchar *filename);
GValue *gda_value_new_timestamp_from_timet (time_t val);
GValue *gda_value_new_from_string (const gchar *as_string, GType type);
GValue *gda_value_new_from_xml (const xmlNodePtr node);
void gda_value_free (GValue *value);
void gda_value_reset_with_type (GValue *value, GType type);
gboolean gda_value_is_null (const GValue *value);
gboolean gda_value_is_number (const GValue *value);
GValue *gda_value_copy (const GValue *value);
const GdaBinary *gda_value_get_binary (const GValue *value);
void gda_value_set_binary (GValue *value, const GdaBinary *binary);
void gda_value_take_binary (GValue *value, GdaBinary *binary);
const GdaBlob *gda_value_get_blob (const GValue *value);
void gda_value_set_blob (GValue *value, const GdaBlob *blob);
void gda_value_take_blob (GValue *value, GdaBlob *blob);
const GdaGeometricPoint *gda_value_get_geometric_point (const GValue *value);
void gda_value_set_geometric_point (GValue *value, const GdaGeometricPoint *val);
void gda_value_set_null (GValue *value);
const GdaNumeric *gda_value_get_numeric (const GValue *value);
void gda_value_set_numeric (GValue *value, const GdaNumeric *val);
gshort gda_value_get_short (const GValue *value);
void gda_value_set_short (GValue *value, const gshort val);
gushort gda_value_get_ushort (const GValue *value);
void gda_value_set_ushort (GValue *value, const gushort val);
const GdaTime *gda_value_get_time (const GValue *value);
void gda_value_set_time (GValue *value, const GdaTime *val);
const GdaTimestamp *gda_value_get_timestamp (const GValue *value);
void gda_value_set_timestamp (GValue *value, const GdaTimestamp *val);
gboolean gda_value_set_from_string (GValue *value,
const gchar *as_string,
GType type);
gboolean gda_value_set_from_value (GValue *value, const GValue *from);
gint gda_value_differ (const GValue *value1, const GValue *value2);
gint gda_value_compare (const GValue *value1, const GValue *value2);
gchar *gda_value_stringify (const GValue *value);
xmlNodePtr gda_value_to_xml (const GValue *value);
gchar *gda_binary_to_string (const GdaBinary *bin, guint maxlen);
GdaBinary *gda_string_to_binary (const gchar *str);
gchar *gda_blob_to_string (GdaBlob *blob, guint maxlen);
GdaBlob *gda_string_to_blob (const gchar *str);
/* Custom data types */
GType gda_null_get_type (void) G_GNUC_CONST;
GType gda_default_get_type (void) G_GNUC_CONST;
GType gda_numeric_get_type (void) G_GNUC_CONST;
GdaNumeric* gda_numeric_new (void);
GdaNumeric* gda_numeric_copy (GdaNumeric *src);
void gda_numeric_set_from_string (GdaNumeric *numeric, const gchar* str);
void gda_numeric_set_double (GdaNumeric *numeric, gdouble number);
gdouble gda_numeric_get_double (const GdaNumeric *numeric);
void gda_numeric_set_precision (GdaNumeric *numeric, glong precision);
glong gda_numeric_get_precision (const GdaNumeric *numeric);
void gda_numeric_set_width (GdaNumeric *numeric, glong width);
glong gda_numeric_get_width (const GdaNumeric *numeric);
gchar* gda_numeric_get_string (const GdaNumeric *numeric);
void gda_numeric_free (GdaNumeric *numeric);
GType gda_time_get_type (void) G_GNUC_CONST;
gpointer gda_time_copy (gpointer boxed);
void gda_time_free (gpointer boxed);
gboolean gda_time_valid (const GdaTime *time);
void gda_time_change_timezone (GdaTime *time, glong ntz);
GType gda_timestamp_get_type (void) G_GNUC_CONST;
gpointer gda_timestamp_copy (gpointer boxed);
void gda_timestamp_free (gpointer boxed);
gboolean gda_timestamp_valid (const GdaTimestamp *timestamp);
void gda_timestamp_change_timezone (GdaTimestamp *ts, glong ntz);
GType gda_geometricpoint_get_type (void) G_GNUC_CONST;
gpointer gda_geometricpoint_copy (gpointer boxed);
void gda_geometricpoint_free (gpointer boxed);
GType gda_binary_get_type (void) G_GNUC_CONST;
gpointer gda_binary_copy (gpointer boxed);
void gda_binary_free (gpointer boxed);
GType gda_blob_get_type (void) G_GNUC_CONST;
gpointer gda_blob_copy (gpointer boxed);
void gda_blob_free (gpointer boxed);
void gda_blob_set_op (GdaBlob *blob, GdaBlobOp *op);
GType gda_short_get_type (void) G_GNUC_CONST;
GType gda_ushort_get_type (void) G_GNUC_CONST;
G_END_DECLS
#endif
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