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column.c
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column.c
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/*!
\file lib/db/dbmi_base/column.c
\brief DBMI Library (base) - columns management
(C) 1999-2009, 2011 by the GRASS Development Team
This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.
\author Joel Jones (CERL/UIUC), Radim Blazek
\author Doxygenized by Martin Landa <landa.martin gmail.com> (2011)
*/
#include <stdlib.h>
#include <string.h>
#include <grass/gis.h>
#include <grass/dbmi.h>
/*!
\brief Returns column value for given column structure
\param column pointer to dbColumn
\return pointer to dbValue
*/
dbValue *db_get_column_value(dbColumn *column)
{
return &column->value;
}
/*!
\brief Returns column default value for given column structure
\param column pointer to dbColumn
\return pointer to dbValue
*/
dbValue *db_get_column_default_value(dbColumn * column)
{
return &column->defaultValue;
}
/*!
\brief Define column sqltype for column
The function db_sqltype_name() returns sqltype description.
\code
#define DB_SQL_TYPE_UNKNOWN 0
#define DB_SQL_TYPE_CHARACTER 1
#define DB_SQL_TYPE_SMALLINT 2
#define DB_SQL_TYPE_INTEGER 3
#define DB_SQL_TYPE_REAL 4
#define DB_SQL_TYPE_DOUBLE_PRECISION 6
#define DB_SQL_TYPE_DECIMAL 7
#define DB_SQL_TYPE_NUMERIC 8
#define DB_SQL_TYPE_DATE 9
#define DB_SQL_TYPE_TIME 10
#define DB_SQL_TYPE_TIMESTAMP 11
#define DB_SQL_TYPE_INTERVAL 12
#define DB_SQL_TYPE_TEXT 13
#define DB_SQL_TYPE_SERIAL 21
\endcode
\param column pointer to dbColumn
\param sqltype SQL data type (see list)
*/
void db_set_column_sqltype(dbColumn *column, int sqltype)
{
column->sqlDataType = sqltype;
}
/*!
\brief Set column host data type
\param column pointer to dbColumn
\param type data type
*/
void db_set_column_host_type(dbColumn * column, int type)
{
column->hostDataType = type;
}
/*!
\brief Get column scale
\param column pointer to dbColumn
\return scale
*/
int db_get_column_scale(dbColumn * column)
{
return column->scale;
}
/*!
\brief Set column scale
\param column pointer to dbColumn
\param scale column scale value
*/
void db_set_column_scale(dbColumn * column, int scale)
{
column->scale = scale;
}
/*!
\brief Get column precision
\param column pointer to dbColumn
\return precision
*/
int db_get_column_precision(dbColumn * column)
{
return column->precision;
}
/*!
\brief Set column precision
\param column pointer to dbColumn
\param precision value
*/
void db_set_column_precision(dbColumn * column, int precision)
{
column->precision = precision;
}
/*!
\brief Returns column sqltype for column
The function db_sqltype_name() returns sqltype description.
\param column pointer to dbColumn
\return sql data type (see include/dbmi.h)
*/
int db_get_column_sqltype(dbColumn *column)
{
return column->sqlDataType;
}
/*!
\brief Get column host type
\param column pointer to dbColumn
\return data type (see include/dbmi.h)
*/
int db_get_column_host_type(dbColumn * column)
{
return column->hostDataType;
}
/*!
\brief Set default value identificator
\param column pointer to dbColumn
*/
void db_set_column_has_defined_default_value(dbColumn * column)
{
column->hasDefaultValue = 1;
}
/*!
\brief Unset default value identificator
\todo Replace by db_unset_column_has_default_value() ?
\param column pointer to dbColumn
*/
void db_set_column_has_undefined_default_value(dbColumn * column)
{
column->hasDefaultValue = 0;
}
/*!
\brief Unset default value identificator
\param column pointer to dbColumn
*/
void db_unset_column_has_default_value(dbColumn * column)
{
column->hasDefaultValue = 0;
}
/*!
\brief Check if column has defined default value
\param column pointer to dbColumn
\return 1 if true
\return 0 if false
*/
int db_test_column_has_default_value(dbColumn * column)
{
return (column->hasDefaultValue != 0);
}
/*!
\brief Check if column has defined default value
\param column pointer to dbColumn
\return 1 if true
\return 0 if false
*/
int db_test_column_has_defined_default_value(dbColumn * column)
{
return (column->hasDefaultValue);
}
/*!
\brief Check if column has defined default value
\param column pointer to dbColumn
\return 1 if false
\return 0 if true
*/
int db_test_column_has_undefined_default_value(dbColumn * column)
{
return (!column->hasDefaultValue);
}
/*!
\brief Set default value to be used
\param column pointer to dbColumn
*/
void db_set_column_use_default_value(dbColumn * column)
{
column->useDefaultValue = 1;
}
/*!
\brief Unset default value to be used
\param column pointer to dbColumn
*/
void db_unset_column_use_default_value(dbColumn * column)
{
column->useDefaultValue = 0;
}
/*!
\brief Checks if default value is used
\param column pointer to dbColumn
\return 1 if true
\return 0 if false
*/
int db_test_column_use_default_value(dbColumn * column)
{
return (column->useDefaultValue != 0);
}
/*!
\brief Set null value to be allowed
\param column pointer to dbColumn
*/
void db_set_column_null_allowed(dbColumn * column)
{
column->nullAllowed = 1;
}
/*!
\brief Unset null value to be allowed
\param column pointer to dbColumn
*/
void db_unset_column_null_allowed(dbColumn * column)
{
column->nullAllowed = 0;
}
/*!
\brief Checks if null value is allowed
\param column pointer to dbColumn
\return 1 if true
\return 0 if false
*/
int db_test_column_null_allowed(dbColumn * column)
{
return (column->nullAllowed != 0);
}
/*!
\brief Get column's length
\param column pointer to dbColumn
\return length
*/
int db_get_column_length(dbColumn * column)
{
return column->dataLen;
}
/*!
\brief Set column's length
\param column pointer to dbColumn
\param length value
*/
void db_set_column_length(dbColumn * column, int length)
{
column->dataLen = length;
}
/*!
\brief Set select privilages to be granted
\param column pointer to dbColumn
*/
void db_set_column_select_priv_granted(dbColumn * column)
{
column->select = DB_GRANTED;
}
/*!
\brief Unset select privilages
\param column pointer to dbColumn
*/
void db_set_column_select_priv_not_granted(dbColumn * column)
{
column->select = DB_NOT_GRANTED;
}
/*!
\brief Get select privilages
\param column pointer to dbColumn
\return privilages
*/
int db_get_column_select_priv(dbColumn * column)
{
return column->select;
}
/*!
\brief Set update privilages to be granted
\param column pointer to dbColumn
*/
void db_set_column_update_priv_granted(dbColumn * column)
{
column->update = DB_GRANTED;
}
/*!
\brief Unset update privilages
\param column pointer to dbColumn
*/
void db_set_column_update_priv_not_granted(dbColumn * column)
{
column->update = DB_NOT_GRANTED;
}
/*!
\brief Get update privilages
\param column pointer to dbColumn
\return privilages
*/
int db_get_column_update_priv(dbColumn * column)
{
return column->update;
}
/*!
\brief Initialize dbColumn
\param column pointer to dbColumn to be initialized
*/
void db_init_column(dbColumn * column)
{
db_zero((void *)column, sizeof(dbColumn));
db_init_string(&column->columnName);
db_init_string(&column->description);
db_init_string(&column->value.s);
db_init_string(&column->defaultValue.s);
}
/*!
\brief Set column name
\param column pointer to dbColumn
\param name column name
\return DB_OK on success
\return error code on failure
*/
int db_set_column_name(dbColumn * column, const char *name)
{
return db_set_string(&column->columnName, name);
}
/*!
\brief Returns column name for given column
\param column pointer to dbColumn
\return pointer to string with column name
*/
const char *db_get_column_name(dbColumn * column)
{
return db_get_string(&column->columnName);
}
/*!
\brief Set column description
\param column pointer to dbColumn
\param description column's description
\return DB_OK on success
\return error code on failure
*/
int db_set_column_description(dbColumn * column, const char *description)
{
return db_set_string(&column->description, description);
}
/*!
\brief Returns column description for given column
\param column pointer to dbColumn
\return pointer to string with column's description
*/
const char *db_get_column_description(dbColumn * column)
{
return db_get_string(&column->description);
}
/*!
\brief Frees column structure
\param column pointer to dbColumn
*/
void db_free_column(dbColumn * column)
{
db_free_string(&column->columnName);
db_free_string(&column->value.s);
/* match init? */
db_free_string(&column->description);
db_free_string(&column->defaultValue.s);
}
/*!
\brief Copy a db column from source to destination
\param src The column to copy from
\param dest An allocated column to copy to which will be
initialized. In case dest is NULL a new column will be allocated
and returned
\return The pointer of copied/allocated column
*/
dbColumn *db_copy_column(dbColumn *dest, dbColumn *src)
{
dbColumn *new = dest;
if(new == NULL)
new = (dbColumn *) db_calloc(sizeof(dbColumn), 1);
else
db_init_column(new);
db_copy_string(&new->columnName, &src->columnName);
db_copy_string(&new->description, &src->description);
db_copy_value(&new->defaultValue, &src->defaultValue);
db_copy_value(&new->value, &src->value);
new->dataLen = src->dataLen;
new->hasDefaultValue = src->hasDefaultValue;
new->hostDataType = src->hostDataType;
new->nullAllowed = src->nullAllowed;
new->precision = src->precision;
new->scale = src->scale;
new->select = src->select;
new->sqlDataType = src->sqlDataType;
new->update = src->update;
new->useDefaultValue = src->useDefaultValue;
return new;
}