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value.c
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value.c
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/*!
\file lib/db/dbmi_base/value.c
\brief DBMI Library (base) - value 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 <grass/dbmi.h>
/*!
\brief Check of value is null
\param value pointer to dbValue
\return non-zero is null
\return zero is not null
*/
int db_test_value_isnull(dbValue * value)
{
return (value->isNull != 0);
}
/*!
\brief Get integer value
\param value pointer to dbValue
\return value
*/
int db_get_value_int(dbValue * value)
{
return (value->i);
}
/*!
\brief Get double precision value
\param value pointer to dbValue
\return value
*/
double db_get_value_double(dbValue * value)
{
return (value->d);
}
/*!
\brief Get value as double
For given value and C type of value returns double representation.
\param value pointer to dbValue
\param ctype C data type
\return value
*/
double db_get_value_as_double(dbValue * value, int ctype)
{
double val;
switch (ctype) {
case (DB_C_TYPE_INT):
val = (double)db_get_value_int(value);
break;
case (DB_C_TYPE_STRING):
val = atof(db_get_value_string(value));
break;
case (DB_C_TYPE_DOUBLE):
val = db_get_value_double(value);
break;
default:
val = 0;
}
return val;
}
/*!
\brief Get string value
\param value pointer to dbValue
\return value
*/
const char *db_get_value_string(dbValue * value)
{
return (db_get_string(&value->s));
}
/*!
\brief Get year value
\param value pointer to dbValue
\return value
*/
int db_get_value_year(dbValue * value)
{
return (value->t.year);
}
/*!
\brief Get month value
\param value pointer to dbValue
\return value
*/
int db_get_value_month(dbValue * value)
{
return (value->t.month);
}
/*!
\brief Get day value
\param value pointer to dbValue
\return value
*/
int db_get_value_day(dbValue * value)
{
return (value->t.day);
}
/*!
\brief Get hour value
\param value pointer to dbValue
\return value
*/
int db_get_value_hour(dbValue * value)
{
return (value->t.hour);
}
/*!
\brief Get minute value
\param value pointer to dbValue
\return value
*/
int db_get_value_minute(dbValue * value)
{
return (value->t.minute);
}
/*!
\brief Get seconds value
\param value pointer to dbValue
\return value
*/
double db_get_value_seconds(dbValue * value)
{
return (value->t.seconds);
}
/*!
\brief Set value to null
\param value pointer to dbValue
*/
void db_set_value_null(dbValue * value)
{
value->isNull = 1;
}
/*!
\brief Set value to not null
\param value pointer to dbValue
*/
void db_set_value_not_null(dbValue * value)
{
value->isNull = 0;
}
/*!
\brief Set integer value
\param value pointer to dbValue
\param i integer value
*/
void db_set_value_int(dbValue * value, int i)
{
value->i = i;
db_set_value_not_null(value);
}
/*!
\brief Set double precision value
\param value pointer to dbValue
\param d double value
*/
void db_set_value_double(dbValue * value, double d)
{
value->d = d;
db_set_value_not_null(value);
}
/*!
\brief Set string value
\param value pointer to dbValue
\param s string value
*/
int db_set_value_string(dbValue * value, const char *s)
{
db_set_value_not_null(value);
return db_set_string(&value->s, s);
}
/*!
\brief Set year value
\param value pointer to dbValue
\param year year value
*/
void db_set_value_year(dbValue * value, int year)
{
value->t.year = year;
db_set_value_datetime_not_current(value);
}
/*!
\brief Set month value
\param value pointer to dbValue
\param month month value
*/
void db_set_value_month(dbValue * value, int month)
{
value->t.month = month;
db_set_value_datetime_not_current(value);
}
/*!
\brief Set day value
\param value pointer to dbValue
\param day day value
*/
void db_set_value_day(dbValue * value, int day)
{
value->t.day = day;
db_set_value_datetime_not_current(value);
}
/*!
\brief Set hour value
\param value pointer to dbValue
\param hour hour value
*/
void db_set_value_hour(dbValue * value, int hour)
{
value->t.hour = hour;
db_set_value_datetime_not_current(value);
}
/*!
\brief Set minute value
\param value pointer to dbValue
\param minute minute value
*/
void db_set_value_minute(dbValue * value, int minute)
{
value->t.minute = minute;
db_set_value_datetime_not_current(value);
}
/*!
\brief Set seconds value
\param value pointer to dbValue
\param seconds seconds value
*/
void db_set_value_seconds(dbValue * value, double seconds)
{
value->t.seconds = seconds;
db_set_value_datetime_not_current(value);
}
/*!
\brief Check if datatime is current
\param value pointer to dbValue
\return non-zero for true
\return zero for false
*/
int db_test_value_datetime_current(dbValue * value)
{
return (value->t.current != 0);
}
/*!
\brief Set datetime to current
\param value pointer to dbValue
*/
void db_set_value_datetime_current(dbValue * value)
{
value->t.current = 1;
db_set_value_not_null(value);
}
/*!
\brief Set value to non-current
\param value pointer to dbValue
*/
void db_set_value_datetime_not_current(dbValue * value)
{
value->t.current = 0;
db_set_value_not_null(value);
}
/*!
\brief Copy value
Copy value from src to destination
\param dst destination dbValue
\param src source dbValue
*/
void db_copy_value(dbValue * dst, dbValue * src)
{
dst->isNull = src->isNull;
dst->i = src->i;
dst->d = src->d;
if (src->s.nalloc > 0)
db_copy_string(&(dst->s), &(src->s));
dst->t.current = src->t.current;
dst->t.year = src->t.year;
dst->t.month = src->t.month;
dst->t.day = src->t.day;
dst->t.hour = src->t.hour;
dst->t.minute = src->t.minute;
dst->t.seconds = src->t.seconds;
}
/*!
\brief Initialize dbCatValArray
\param arr pointer to dbCatValArray to be initialized
*/
void db_CatValArray_init(dbCatValArray * arr)
{
arr->n_values = 0;
arr->alloc = 0;
arr->value = NULL;
}
/*!
\brief Free allocated dbCatValArray
\param arr pointer to dbCatValArray
*/
void db_CatValArray_free(dbCatValArray * arr)
{
if (arr->ctype == DB_C_TYPE_STRING || arr->ctype == DB_C_TYPE_DATETIME) {
int i;
for (i = 0; i < arr->n_values; i++) {
if (arr->ctype == DB_C_TYPE_STRING && arr->value[i].val.s) {
db_free_string(arr->value[i].val.s);
}
if (arr->ctype == DB_C_TYPE_DATETIME && arr->value[i].val.t) {
db_free(arr->value[i].val.t);
}
}
}
G_free(arr->value);
}
/*!
\brief Allocate dbCatValArray
\todo return type void?
\param arr pointer to dbCatValArray
\param n number of items
\return DB_OK
*/
int db_CatValArray_alloc(dbCatValArray * arr, int n)
{
arr->value = (dbCatVal *) G_calloc(n, sizeof(dbCatVal));
arr->alloc = n;
return DB_OK;
}
/*!
\brief Realloc dbCatValArray
\todo return code void?
\param arr pointer to dbCatValArray
\param n number of items
\return DB_OK
*/
int db_CatValArray_realloc(dbCatValArray * arr, int n)
{
arr->value = (dbCatVal *) G_realloc(arr->value, n * sizeof(dbCatVal));
arr->alloc = n;
return DB_OK;
}